CN103220968A - Hydrostatic finger cuff for blood wave form analysis and diagnostic support - Google Patents
Hydrostatic finger cuff for blood wave form analysis and diagnostic support Download PDFInfo
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- CN103220968A CN103220968A CN2011800483730A CN201180048373A CN103220968A CN 103220968 A CN103220968 A CN 103220968A CN 2011800483730 A CN2011800483730 A CN 2011800483730A CN 201180048373 A CN201180048373 A CN 201180048373A CN 103220968 A CN103220968 A CN 103220968A
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- inflatable part
- pressure
- fingerstall
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/02233—Occluders specially adapted therefor
- A61B5/02241—Occluders specially adapted therefor of small dimensions, e.g. adapted to fingers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6825—Hand
- A61B5/6826—Finger
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
Abstract
A hydrostatic finger cuff for blood flow property analysis is provided which includes an elongated substrate member which has a pair of opposing long edges and a pair of opposing short edges. The hydrostatic finger cuff is configured to form a frustoconical shell when the ends of the cuff are overlapped and releasably connected together. The interior of the frustoconical shell conforms to the shape of the middle phalange of a finger and the first phalange of a thumb. ODavne side of the elongated member has an inflatable member that has a pressurizable interior region. A tube is fixed to the inflatable member and is in pneumatic communication with the interior of the inflatable member inflatable to a maximum of no more than 60 mmHg. The inflatable member completely circumscribes the finger and provides substantially uniform contact across the entire length of a phalange, in particular, the middle phalange of the middle finger. A pressure relief member is in fluid communication with the inflatable member, and is set to open and release pressure at a pressure level no higher than 1.2 psi.
Description
Statement of government interest
The research contract N00014-10-C-0204 of office of naval
Technical field
The present invention relates to a kind of arterial pulse that is used to measure, be specifically related to a kind of finger Mechanical Contact of direct and user of using and still do not block the method for the noinvasive instrument of the blood flow in the finger the continuous monitoring of arterial pulse waveform.
Background technology
Pressure pulse, blood be mobile machinery performance in tremulous pulse, is considered to usually can obtain optimum detection at well-known classical pressure point place, and its position is delivered in the literature widely.Near skin surface, to such an extent as to use the slight pressure (auscultation) of tightening, the pulsation that heart beating causes can be as the detecting by machinery of the fluctuation in the power of tightening at these tremulous pulsies.
Summary of the invention
According to embodiments of the invention, proposed to be used for the static pressure fingerstall that blood flowing characteristic is analyzed, comprise elongated substrate parts with a pair of relative long limit and a pair of relative minor face.When the fingerstall bottom was overlapping, fingerstall was configured to form a frustum of a cone shell and can links together releasedly.The interior shape of frustum of a cone shell meets the middle phalanxes of finger and first phalanges of thumb.The preferential distal joint of middle finger of selecting is worn fingerstall to the interarticular zone of near-end.Fingerstall can use for a patient, handles after use to prevent hospital infection.Patient uses fingerstall after a while, can handle, and the fingerstall that more renews then, untapped fingerstall can further use by patients.
In a preferred embodiment, described a pair of relative long limit radius of curvature is about 7 inches to 13 inches.In a further advantageous embodiment, the radius of curvature of first long side is from 10 inches to about 13 inches, and the radius of curvature of second long side is from 10 inches to about 7 inches.The radius of curvature of first long side in preferred embodiment from 10 inches to about 12 inches, the radius of curvature of second long side is from 10 inches to about 8 inches.
In another embodiment of the present invention, inflatable part is installed in the front of elongated member, and this expansible elements has the interior zone that can pressurize.A pipe is fixed to inflatable part, is connected with the inside of inflatable part is pneumatic.This inflatable part preferably is sealed in the polyurethane film on the polyurethane-base bottom parts.Wherein parts of two parts adapters, the part that optimizely select is smashed is bonded at the front of elongated member, places the first side near the elongated substrate parts.Inflatable part places the second side near elongated member, and the other part of hasp is attached to the reverse side of elongated member in the inflatable part.Preferably ring is hooked in the end of inflatable part near inflatable part, when fingerstall wraps finger, can optimize fingerstall like this, makes its profile with user's finger consistent.Perhaps use detachably, reusable adhesive replaces the hasp adapter.For example at United States Patent (USP) U.S.Pat.6,040,028 and 5,102,714, and Japan Patent, detachable of describing among JP08188755 and the JP06279741 based on polyurethane, reusable pressure sensitive adhesive mixture (PSAs).PSA has makes fingerstall better meet the advantage of pointing curvature.
In a preferred embodiment, substrate parts, inflatable part, pipe are to be made of polyurethane
In additional embodiments of the present invention, the length of the long side of elongated substrate parts is from 3 inches to about 6 inches.
In additional embodiments of the present invention, the radius of curvature of first long side of elongated substrate parts arrives in about 12 inches scope at 10 inches, and the radius of curvature of second long side arrives in about 8 inches scopes at 10 inches.
In embodiment further, inflatable part of the present invention is essentially rectangle, and the effective surface area scope is 0.9 to 2.55 square inch.
In another embodiment, inflatable part of the present invention is essentially rectangle, at least 1.5 square inches of effective surface areas, and preferably effective surface area is in 1.5 to 2.5 square inches, so that adapt to bigger finger.
In a further embodiment, inflatable part of the present invention is essentially rectangle, and the effective surface area scope is about 0.9 to 1.3 square inch.The width of first side of inflatable part effective coverage is narrower slightly to the distance between the near-end joint than finger tip joint, preferably expands to the place near finger near-end joint from the place near the finger tip joint.Optimum, the length of first side in 0.6 inch to 1.2 inches scope holding than pinkie, in 1.25 inches to 0.88 inch scope to hold bigger finger.Preferably use user's middle finger.
In the further embodiment of the present invention, inflatable part is essentially rectangle, the scope of length-width ratio be from 1.5: 1 to 2.5:1, the scope of preferred length-width ratio is from 1.75:1 to 2.25: 1, optimum is about 2: 1.
In an embodiment of the present invention, one side length range of the effective coverage of inflatable part 0.63 inch in 0.88 inch, the length range of second side is from 1 inch to 1.5 inches.
In another embodiment of the present invention, the first lateral length range of the effective coverage of inflatable part 1.25 inches in 0.88 inch, the second lateral length range of the effective coverage of inflatable part at 2.25 inches in 1.5 inches.About the average perimeter of user's middle phalanxes, inflatable part length covers 1/2 of finger middle phalanxes girth at least, preferably covers 2/3 of finger middle phalanxes circumference at least, points as first-selection with middle finger.
In an embodiment of the present invention, the ips scope is in 0.05 to 0.075 inch, for the fluid that optimum level is provided between inflatable part and the pressure transducer is communicated with.
It should be noted that dimensions has showed a key feature of the present invention, in the present invention, inflatable part must encase finger fully, and in whole phalanges length range the middle phalanxes of even contact, especially middle finger.These form contrast with optical pickocff that focuses on the finger arteriosomes in fact and palpation equipment.
In another embodiment of the present invention, the static pressure fingerstall that is used for the blood flowing characteristic analysis comprises elongated substrate parts, be installed in the inflatable part in elongated member front, pipe is fixed to inflatable part and inner pneumatic connection of inflatable part, the front that is bonded at elongated member is arranged in a part and the decompression member near the hasp of the first side of elongated substrate parts.Decompression member is connected with inflatable member fluid, is set to out when pressure stage is no more than 1.2psi and release pressure.
In another embodiment of the present invention, one end of pipe is near inflatable part, and the other end is away from inflatable part, and decompression member is one and is attached between the pipe two ends certain any lift valve, when pressure stage is no more than 1.2psi, be set to out and release pressure, and preferably be no more than 1.1psi.Lift valve by ' Y " or " " adapter is connected on the pipe T.
In of the present invention another implemented, decompression member was a fragile part that anchors on the substrate parts, is connected with the pneumatic element internal flow.This fragile part can be a film, is designed to open and release pressure when pressure stage reaches 1.2psi, and preferably is no more than 1.1psi.
In further embodiment of the present invention, blood flowing characteristic is analyzed and is monitored by a fingerstall equipment, this equipment comprises an elongated substrate parts with a front and a reverse side, be installed in the inflatable part in elongated member front, inflatable part has the interior zone that can pressurize, pipe is fixed on the inflatable part and the inner pneumatic communication of inflatable part, one side of an adapter is bonded at the front of elongated member, the position is near the first side of elongated substrate parts, the inflatable part position is near the second side of elongated member, and another part of adapter is fixed on the reverse side of elongated member.This monitoring method may further comprise the steps:
A-is with the finger of finger sleeve ring around user
B-is fixed together two parts of adapter forming the middle phalanxes that a cylindrical sleeve encases finger, and inflatable part is around user's finger,
The c-inflatable part is inflated to the diastolic pressure that pressure is lower than the user
D-produces the pressure oscillation corresponding to the blood pressure of user
Inflatable part is inflated preferable pressure limit at 30psi-60psi, and optimal pressure range is at 40psi-50psi.
In further embodiment of the present invention, pressure pulse is passed to pressure transducer from inflatable part, and the simulation output of pressure transducer is converted to digital signal.Digital signal input computer, digital signal is converted to impulse waveform in computer, and impulse waveform is converted to pressure value.
Description of drawings
Side view when Fig. 1 launches for fingerstall among the present invention;
Side view when Fig. 2 wraps up for fingerstall among the present invention;
Side view when Fig. 3 launches for fingerstall in alternate embodiment of the present invention.
Front view when Fig. 4 launches for fingerstall among the present invention.
Front view when Fig. 5 launches for fingerstall among optional embodiment of the present invention.
Fig. 6 is enclosed within the back of the hand view of user when pointing for middle finger of the present invention.
Palm view when Fig. 7 wraps up for fingerstall among the present invention has been showed pyramidal structure.
Fig. 8 is the perspective view when fingerstall is tapered among the present invention.
Palm view when Fig. 9 wraps up user's thumb first phalanges for fingerstall among the present invention.
Figure 10 is the plane graph of inflatable membrane and pipe in the one embodiment of the invention
Figure 11 is the plane graph of inflatable membrane among optional embodiment of the present invention and pipe
Figure 12's is the optional vertical view of inflatable membrane and pipe in the another embodiment of the present invention.
The specific embodiment
Definition:
In order to implement the present invention, term " piezoelectricity " refers to that crystal or some ceramic material produce the ability of voltage under mechanical stress.In piezoquartz, piezoelectric effect is reversible, and when the outside applied voltage, a little change can take place shape.(for example, deflection is 0.1% of an original size in the piezoelectricity original paper.) this effect has many useful applications, for example produces and survey sound, produces high pressure, produces electronic frequency, microbalance, the ultra-fine focusing of optical module.
In order to implement the present invention, term " piezoelectric element " refers to take place any material of piezoelectric effect.
In order to implement the present invention, term " plethysmograph " refers to based on flowing through or being present in the instrument that certain a part of blood flow volume is measured this organ or this body part change in size.
In order to implement the present invention, term " PZT " finger pressure electric device, lead zirconate titanate for example shows the material of tangible piezoelectric effect, and perhaps any other can reach the electrotechnical ceramics of institute's requirement here.
In order to implement the present invention, term " transreactance amplifier " refers to input current is converted to the circuit of voltage output.Typical case is with the apparatus measures electric current that the voltage input is arranged.To the processing of signal voltage, the electrical attributes that will carry information usually changes voltage into from electric current in circuit electronics.Converter has transformation ratio k=VOUT/I IN[V/mA as one] linear circuit of (be k=V output/I input [V/mA]), have certain resistance.Current-to-voltage converter is the circuit that carries out the current-voltage conversion.The existing edition of this circuit is also referred to as strides resistance or trans-impedance amplifier
In order to implement the present invention, term " optical coupling " refers to minimum coupling grade as used herein.Being coupled to be enough to make between fingerstall and the finger contacts firmly, but can not disturb blood to flow in pointing tremulous pulse.
In order to implement the present invention, term " firmly contact " refers to that the user points with air bag and contacts the analogue signal that is enough to produce a respective user blood pressure fully as used herein.As a comparison, United States Patent (USP) 4726382 discloses a fingerstall, and " outside fingerstall label 18 is non-telescoping, so that allow inflatable bladders 12 to be inflated to influence the patient to point blood circulation in the tremulous pulse." (see the 4th row, 51-59 is capable)
In order to implement the present invention, term " rectangle " refers to the rectangle that all are general as used herein, includes the rectangle of chamfering and the rectangle of the fillet that is commonly called " racing track " shape is arranged.
In order to implement the present invention, term " finger " refers to five fingers that mammal is all on hand as used herein.When mentioning best the use, refer in particular to specific finger, yet but the general use of pointing this term both the best of fingerstall place and also can refer to non-best the placement.
The present invention relates to static pressure fingerstall form and measure changes in heart rate (HRV), blood pressure, hypovolemia, blood volume increases, eartbeat interval, the wireless and noinvasive physiological monitoring system of abnormal patterns and other physiological periods.Monitor data can be stored in and be used in the equipment downloading to PDA or PC by USB or bluetooth after a while, perhaps data in real time is sent on the receiving equipment.
Built-in relevant pressure transducer must have enough sensitivity, and micro-strain must be coupled into pick off and form pulse, therefore can make equipment continuous operation several hrs, even several days.
Standard, commercially available pressure transducer, for example (instrument) or absolute sensor relatively can be used for keeping the fingerstall internal pressure constant and do not have deviation with piezometer.Be to be used for doing gauge pressure transducer in essence,, measure static pressure because it is communicated with atmosphere on the other hand.Yet as unique quantifier, it is very poor that it shows when gaging pressure changes, and removes non-pressure and change very slow as atmospheric pressure.
Second pressure transducer, be used for the time rate of change of gaging pressure.It can not measure static pressure, perhaps absolute value or variable.The piezoelectricity disk is installed on the ring, is used for measuring the pulse pressure fluctuation.They push Radial artery, obtain the waveform of arterial pulse.The problem of doing like this is the detection that slight motion will be missed follow-up 6 to 10 seconds pulses.The problem that quick solution small movements is brought is possible, but can make parts become very big like this, does not belong to mini-plant.Facts have proved by using trans-impedance amplifier, use a small device just can be reduced to stabilization time and be lower than a Cardiac cycle.Produce the time-derivative of pulse pressure pulse thus.
Analyze the arterial pressure pulse with pulse decomposition analysis principle.Deconvolute fingerstall with the pulse of continuous impulse reading input building block by the paired pulses waveform, and this process is called pulse decomposition analysis (PDA).Openly text can be referring to United States Patent (USP) 7,087,025 entirely for the PAD technology, based on the Time delay measurement blood pressure between the heart beating pulse upper prong, pending application application, s/n12/537,228, gradual center Hypovolemia detects, application on August 6th, 2009, pending application: s/n11/500,558, with the method and the diagnosis support device of arterial pulse decomposition analysis mensuration vital sign, PCT/US10/43914, application on July 30th, 2010, these are all enumerated here as a reference.
In optical system, measure the saturation of blood oxygen based on prior art.After the measurement, obtain the waveform that shows that a pulse cycle inner blood oxidation changes.The optics waveform of deriving seems a bit picture pulsating pressure waveform, but whether, it can not be used for obtaining the BP(blood pressure by the pulse decomposition analysis).
The design of fingerstall makes that whole device can the remarkable influence blood flow among the present invention, and is just enough because the fingerstall inflation only needs an a branch of optical coupling to advance to point tremulous pulse.It would be desirable that fingerstall/pressure sleeve can not change the internal diameter of tremulous pulse, therefore can not influence blood flow.Pressure in the preferred fingerstall is less than the diastolic pressure of tremulous pulse, and optimal cases is to be no more than about 50psi.The lower limit of pressure be high enough to can with optical coupling such as tremulous pulse behind the tremulous pulse optocoupler, but enough low and can not disturb blood flow, even if having, also be minimum.Least interference means that fingerstall can use for a long time, promptly uses perhaps many days many hours.
The notion that need understand the external load tremulous pulse is to be used for the being interpreted as working method of what fingerstall and radially air bag is different fully.A simple and easy example intuitively is to consider that balloon of supposition is at 10PSI.The balloon skin in elasticity tension, any one disturbance, for example pulse in balloon can pressurize for the balloon skin.Because can storing immediately, this disturbance or pulse, balloon surpass the background pressure of 10PSI just.This balloon put under atmospheric pressure or another balloon of 0PSI in fact, without any change.Yet when the outside of second balloon is stamped into 10PSI, all things in second balloon all are 10PSI so.Do not have elasticity tension in first balloon, and the pulse in first balloon will be regulated the elasticity tension of second balloon skin.This behavior promptly is so-called unloading tremulous pulse (first balloon).
Fingerstall wraps measurement point, is inflated near the low pressure, and for example, 50mmHg is to increase contact pressure.Pulse causes the minor variations of fingerstall internal pressure then, and this is because the blood wave small volume-variation during through measurement point causes.
For fear of block blood flow, pressure should be lower than diastolic pressure, preferable range 30-70mmhg, optimum range about 35 to 55mmhg.The determining to be based on of force value kept fingerstall and contacted with the good of finger, more specifically, and based on pulse wave.Fingerstall has been applied in uniform circumferential pressure around phalanges.Keep a successive or consistent pressure not necessarily, but setting a maximum pressure value is crucial to avoid block blood flow.Yet, contacting to detect the foothold of pulse pressure waveform with the good of finger from keeping fingerstall, a minimum pressure values is very crucial.
Being connected piezoelectric buzzer element between input and the gain (mutual impedance) changes a little to adjust this signal level and cooperates fingerstall.The bandwidth of this equipment is adjusted a little to remove the induction to external noise source.The external noise signal bandwidth is basically at about 1hz, and signal characteristic extends to about 60hz.
Pneumatic connection is arranged between fingerstall and the analog signal generator.Though fingerstall can be operated in any finger, the optimum measurement point that finds is first phalanges of thumb.When the middle phalanxes that is used to point, especially middle finger also can obtain point-device result.
Thumb provides optimum, as known medical skill, is because thumb contains the principal artery of thumb that originates from Radial artery.Therefore almost can directly regard signal as from the signal of thumb from Radial artery.All attempt directly to measure Radial artery with the method for present many continuous blood pressure measurings, for example the tensionapplanation measurement method of Penaz before.
Other fingers have proper palmar digital arteries, from the ulna tremulous pulse.The average diameter of Radial artery has more 28%(Riekkinen HV than ulna tremulous pulse, Karkola KO, and Kankainen A. Radial artery is bigger than ulna tremulous pulse, thoracic surgery yearbook 2003; 75:882-4).This means that the blood that flows to thumb is more than flowing to other fingers.In addition, finger of Radial artery supply thumb, and the ulna tremulous pulse will be supplied other four fingers.
Have been found that now and use thumb to have superiority, because as if temperature have some relations with the operation of fingerstall equipment.Therefore, use thumb to have superiority, because the size of tremulous pulse is also directly relevant with temperature.As everyone knows, Raynaud disease, thyroid level, anemia, diabetes, coronary heart disease, cancer, arthritis, carpal tunnel syndrome, tendinitis and many other medical conditions can make hands cool off.This is to have reduced blood flow because the extreme of blood vessel is shunk, and finger is cooled off.In having above-mentioned disease patient's body temperature record, the thumb temperature is found and typically is higher than other fingers.Fingerstall among the present invention will be mainly used in injured or sick patient, and the bedfast patient who is considered to lack blood flow.(seeing http://www.handresearch.com/news/cold-hands-warm-heart-raynaud-poor-circulation-fingers.htm)
Further, the thumb capsule, though the same with the finger capsule, it can not experience the mechanical noise problem from flexor tunnel.Almost any motion of any part on the arm all can cause religion tendon friction in some canalis carpis, produces low-frequency noise.The power spectral density of this low frequency click sound and pulse beat are in same bandwidth, and about 0.01to30Hz exists in a large number and can't filter fully.
Though use other element can produce identical result, the preferred piezoelectric element of analog signal generator, be installed in one comprise compression pump, comprise analogue-to-digital converters, on the pressure shell of trans-impedance amplifier, data storage part and signal projector.This data storage part can comprise solid state memory device.Various physics, electric, electronic component is well-known technically, is not the critical of narrow sense.
To such an extent as to but piezoelectric element is installed in withstand voltage airtight can the moving freely of its edge pressure shell, exerting pressure, it is planar to make the element bending be drum.Bending has and the proportional electric charge of pressure the outer surface of piezoelectric.Thereby the electric charge gaging pressure of measuring.By using sensitive equipment, measured value provides the pulse signal that is used to analyze.
There is several different methods to measure electric charge, even the distinct methods significant difference.Voltage amplifier will be measured the whole pressure on the piezoelectric element.The change in voltage that pulse causes changes little than the whole pressure on the sensing element, whole pressure that amplifier must hold generation change.If use enough amplifications to observe pulse signal and its feature, the most of the time signal can pour in power electrode, thereby can't use.Therefore require patient very quiet, and the very careful preparation available signal of service personal.
Prefered method mainly is to shorten the surface of piezoelectricity and the electric current that gaging pressure changes the charge transfer formation that causes.In this case, amplifier is called as transimpedance amplifier, because it has generated a change in voltage that is directly proportional with input current (impedance i.e. volt/electric current).Use this configuration, a voltage output representative pressure changes.Output valve is centered around near 0 volt, can adopt the amplification significantly that only influences signal.
The fingerstall design
The difference of the equipment of technology is not attempt to point palpation to fingerstall with adopting before.Pressure does not put on the finger tremulous pulse, and is opposite, finger by finger sleeve ring around, fingerstall applies circumferencial direction pressure to finger, i.e. extruding finger.
Fingerstall is made by polyurethane fully.Polyurethane film (inch thickness 1/2000th) is bonded into the skin that the 5-7 mil polyurethane forms hook and loop material, preferably uses the radio-frequency welding single stepping.Owing to need in the production process labour force's proportion little so help to reduce the fingerstall cost.Better, the skin that internal layer engaged is the part of the ring in the hook and loop material.
Other materials, the particularly current available or polymeric material that develops hereinafter can provide them not exceed and meets other listed standards of this paper.Have any be noted that at present with polyurethane and other polymeric materials for example silicon or polyethylene to engage be very difficult.
Optimize material even polyurethane film is considered to a kind of skin, be used to the disposable upper arm band of sphygomanometer, also used the disposable sheet with hospital sometimes, but without being usually used in clasp connector.Polyurethane shackle system can only bear about 100 times and connect and disconnect, and system can become not firm afterwards.By contrast, the shackle of non-polyurethane material can stand thousands of time connection and disconnections, and this point is proved having on the similar application clothing.
Use adjustable adapter, hook and loop material for example provides necessary total connection between the finger of the air bag of fingerstall and user.The expansion of air bag is not to be used for regulating the fingerstall of pine, but is used for doing minimum adjusting to obtain firmly contact between air bag and the user finger.
Fig. 1 and 2 listed examples has shown that fingerstall 100 has a hook part 104 attached to inner A face, and the part 106 of ring is attached to outside B face.The part 106 of hook part 104 and ring simultaneously again all at the end of substrate parts 102, is used for protecting fingerstall 100 not only attached to relative two sides.Inflatable sensing element 110 is positioned at the inside A face of substrate parts 102, almost with relative with the part 106 of ring, and contact user finger.In these embodiments, sensing element 110 is made up of inflatable membrane 116 and pipe 114.The edge weld of inflatable membrane 116 is to substrate parts 102, as shown in the figure on the limit 112 and 113.Inflatable membrane 116 is configured to seal the interior zone of being made up of by pressuring method film 116 and substrate parts 102 118, and with pipe 114, pressure transducer 110 connects.600 pneumatic connections of electronics enclosure among pipe 114 and interior zone 118 and Fig. 6.
In Fig. 3 listed examples, fingerstall 200 has used the sensing element 210 the same with sensing unit 110 among Fig. 1 and Fig. 2.Yet in this embodiment, the part 206 of ring extends to the length of whole substrate 202.The part 204 of hook preferably just at the end of substrate 202, causes discomfort with the part 204 that prevents hook with the contact skin of user.
Figure 4 and 5 have been enumerated the outward appearance of two embodiment of fingerstall disclosed herein.In Fig. 4, fingerstall 400 is included in the hook material 408 of substrate 420 ends and at the sensing element 410 of the other end.Inflatable membrane 405 seals it along the circumference 404 of inflatable part 406.Pipe 402 is extended to reception electronic device (not drawing) from inflatable part 406, remains in the seal between substrate 420 and the inflatable membrane 405.Having a buckle 410 on the pipe 402 shifts out from inflatable part 406 unexpectedly to prevent pipe 402.Pipe 402 is sealed between substrate 420 and inflatable part 405 outer peripheral areas 404, and buckle 410 is the another one safety guarantee that provide in the system.Buckle 410 is used for stoping pipe to be extracted in the inflatable region 406 of substrate 420 and inflatable membrane 405 compositions.
As what clearly enumerate among these figure, the substrate parts of fingerstall preferably is not orthogonal, but the edge 430 and 440 of two relative bendings is arranged, and radius of curvature R arrives in about 7 inches scope at about 13 inches.
Fig. 5 has enumerated another one embodiment.Similar with embodiment before, fingerstall 500 is included in the hook material 508 of substrate 520 ends and at the sensing element 510 of the other end.Hermetic unit 504 is in the periphery of inflatable membrane 505.Pipe 502 secure seal that hermetic unit 504 will extend to inflatable membrane 506 inside are very desirable.The same with the embodiment of Fig. 4, pipe 502 has a buckle part 512, is in inflatable region inside in the case, is the button shape.
The range of curvature radius at the edge 530 of substrate 520 about 10 to 13 inches better, preferably 10 to 12 inches.About 10 to 7 inches of the range of curvature radius at the edge 540 of substrate 520 is preferably in 10 to 8 inches scopes.Fully cooperate the male to point required radius of curvature obviously greater than fully cooperating the required radius of curvature of most females fingers.Same, fully cooperate the required radius of curvature of most females fingers obviously greater than fully cooperating the child to point required radius of curvature.Fingerstall must bending be consistent for the taper that is become with the user finger, firmly contacts basically with pointing thereby reach in whole air bag zone.Particularly contact with balloon element 505 from point nearly joint to the radioulnar joint zone whole length.Therefore, fingerstall must can not produce folding line and QI collapse caused by exhaustion of QI of the spleen and kidney with pointing consistent very flexibly.
The example of preferred size:
Following preferred sizes scope is applicable to all disclosed embodiment, though reference number is only from a certain diagram.This is convenient to describe and can not become a limitation.
The length of pipe preferably is not less than several inches or bigger.Because pipe is used for being connected of fingerstall and record/memory device, so the length of pipe can vary depending on the application.In certain embodiments, therefore pipe can prolong in use by the hermetically sealed connector expansion.
As shown in Figure 5, the length of the minor face B of film 505 inflation area is preferably in about 0.63 to 1.5 inch scope.
Substrate parts 520 width " c " are preferably in about 1 1/8 to 1 1/2 inches scopes.
About 0.6 to 1.25 inch of the scope of the width D between two long limits of the inflatable region 506 of film 505, its selection is relevant to the distance between the distal joint with the middle phalanxes near-end of pointing middle finger preferably.
About 1/2 to 3/4 inch of the width E preferable range in hook 508 zones.
The zone 508 of the ring of hook and ring component is preferably greater than the inflatable part zone.
The radius of curvature of basal edge 540 can be in 7-13 inch scope, that short in two long limits of substrate radius of curvature is in 7 to 10 inches scopes, that long radius of curvature is in 10 to 13 inches scopes.
The effective surface area of inflatable part is in 0.9 to 2.5 square inch of scope, and for bigger finger, best surfaces is amassed in 1.5 to 2 square inches of scopes.For less finger, effective surface area is in 0.9 to 1.3 square inch of scope.
Distance R between two minor faces of substrate parts is preferably in 33/4 to 51/4 foot scope in 3 to 6 inches scopes.
One side length of inflatable region or substrate parts should be included in distance between a round rectangle or two opposite faces of chamfering rectangle.
In Fig. 6 A, fingerstall 500 is on the middle phalanxes of user's middle finger, and pipe 502 leads to signal processing and data record and memory device 600.Data can send to any equipment that is used for the Collection and analysis data in the equipment from recording equipment 600.Data are transferred to computer and can be undertaken by present known any way, and are suitable for using.Perhaps, can directly from recording equipment 600, analyze and read data.
Finger has the bone and two radicular arterieses that are positioned at central authorities, each one of both sides.Fingerstall is placed on user's finger, and flexible air bag contacts with two tremulous pulsies.Air bag is pressurized to about 40mmHg, the fingerstall extruding finger tissue of columniform pressurization and unloading finger tremulous pulse.Air bag has been eliminated the spring function of tremulous pulse around finger, and elastic restoring force is provided, and promptly air bag has become the elastic artery wall.Air bag also contains the pulse pressure waveform simultaneously.Tremulous pulse does not push bone, does not hinder blood circulation, does not use Palpation simultaneously.As noted earlier, the pressure after the air bag supercharging is lower than diastolic pressure.By extreme contrast, brachial artery cuff plethysmograph must be stamped into than systolic arterial pressure is high and could work.
The balloon that children use in ballooning and the party is similar.If the weak balloon size of supercharging is constant, just hold up.If supercharging is too much, balloon is excessively inflated, and is called balloon usually.Polyurethane can excessively not inflated.In the static pressure fingerstall, must avoid excessive expansion.
The clear fingerstall 500 and the cone shape that twine showed in Fig. 7.Obtaining this shape is one aspect of the present invention, and it is that 612 zones contact uniformly from terminal joint 610 to the near-end joint with middle phalanxes 600 for inflatable membrane.Can see very clearly among the figure that pipe 502 stretches out from fingerstall 500.
At least use two fail safe mechanism to prevent that fingerstall from overcharging, fingerstall overcharges when expansion is used can kill finger.One is software per quart detected pressures second, if the pressure height, whole system is closed and pressure is dynamo-electric discharges.
Structure of the present invention is designed to an autonomous Self Powered Device.Because current available valve is approximately needing 180mA to keep normally open valve to close under the 4V voltage, so the present invention has used one normally closedly to cut down the conserve batteries power supply.Stimulate in this case and cause the aerofluxus action, discharge gasbag pressure.
Common power failure can be impassive the pressure in the air bag that causes discharge.Therefore, first fail safe step, per quart detects absolute pressure second, and can close whole process by software command and control.As described above, the setting value of air bag supercharging is 50mmHg, just in time is lower than diastolic pressure, therefore can not damage finger.Preferably, can import a maximum set value and protect as add-on security by the software control setting value.
Second heavily fail safe be to use a lift valve, when reaching the maximum pressure of prior setting, lift valve is opened.In traditional automatic sphygmomanometer, there is no need to use lift valve, because oversleeve energy controlled pressure, pressure can reach 200mmHg or higher, and if power failure, it will be opened and release pressure, eliminate all danger to the wearer.Fingerstall based on technology before uses a normally open valve, excites valve-off by electricity.As described above, the present invention has used a normally close valve, and is opposite with before fingerstall.Lift valve used herein is arranged on about 1 to 1.2PSI.Therefore, surpass setting value when pressure increases, lift valve does not need Electronic Control with passive release pressure.
Fig. 8 has provided the fingerstall 500 that does not have the user to point.Pipe 502 stretches out from film 505, and hook 508 is attached on the ring 506.
In Figure 10, lift valve 700 is attached on the manifold that is illustrated as t connector 704, and t connector 704 is inserted in the pipe 502 that stretches out from inflatable region 505 and between the pipe 702 that stretches to the pump in electronic device shell 600.Even t connector 704 uses in the present embodiment, any method of prolonging pipe location lift valve 700 can be used, and these methods are known by the people who is skilled in technique, for example, and " the shape manifold by use ' Y.
In the embodiment shown in fig. 11, as embodiment before, inflatable region 742 comprises stretches to electronic equipment 600(and does not draw) pipe 722 and a buckle 710 independently.In addition, second pipe 703 stretches into inflatable region 742, and buckle 712 has been installed there.The other end of pipe 703 stretches to lift valve 720.This is pointed out that more safety measure is presented as the insurance premium that needs are less, thereby reduces cost.As described above, pipe 703 and 722 preferably is fused on polyurethane pneumatic element and the polyurethane-base bottom parts.
Lift valve comprises stainless steel spring and the steel ball that is installed in stainless steel tube inside, and stainless steel tube has agnail to hook for example 722 and/or 703 inside of polymer pipe outward.Valve member preferably has an accurate valve seat in case stopping leak reveals.Lift valve selectively or additional being included in the electronic device shell 600.
At another selectable polymer moieties, use valve to provide separately with fingerstall.When overcharging modes of inflation, because some unaccountable or accidental causes, polymeric membrane lost efficacy and release pressure, caused fingerstall can't use this moment.Fingerstall is can be reusable, abandons but can use up promptly for the reason of health, and fingerstall only is intended for use single user strictly speaking, for example the single patient in the hospital.One the time that user can quite be grown uses fingerstall and temporarily unloads fingerstall, when for example having a bath or washing one's hands, but can consider disposable use.In addition, if fingerstall dirty can abandon the fingerstall that more renews then.
In the embodiment shown in fig. 12, unload press mold 810 and can be formed directly on the air bag and (do not draw), even rupture diaphragm contacts and can make the expansible pressure of film that adverse influence be arranged to being used for finger.Preferably rupture diaphragm 810 is formed on the substrate parts 808, and an opening 811 is provided on ring material 804.Because shackle 804 systems do not form sealing, the expansion of film 810 will cause the fingerstall hook and the air that encircles between 804 is released.
Yet be used at fingerstall, the substrate parts that is preferably in substrate 808 inside covers film 810 top zones provides an elongated slot 812.Just in case film rupture can make the faster release of pressure.In another embodiment, the part of fastener hook can be provided with a plurality of air ducts hole, and is the same with the effect of single elongated opening 812.
Though usually fracturing diaphragm is processed into disc form, also is processed into rectangular slab (fracture plate or vent cover plate).Equipment size is preferably in below 1/4 inch and can makes by different materials, and especially polymeric film just can break below the pressure of 2psi.
As selection, rupture diaphragm can be installed with the form of the lift valve among the lift valve among Figure 10 700 or Figure 11 720.
Two kinds of typical body internal pressures
1Pa=145x10′
6psi1kPa=1000Pa=145x10′
3psi.
1psi=6.89kPa40mm?Hg=40x133.3Pa=5.33kPa
The pulse decomposition algorithm
The essential part of algorithm is the peak detector that 1-is used for identifying at derived data stream heart beating, 2-is used to generate the differentiator of the heart beating second dervative of detection, second dervative is to be used for obtaining to meet the anti-phase of assembly pulse position, the 3-digital integrator, realize by Bessel filter, obtain the impulse waveform behind the integration from the original data stream that has broken up, determine the amplitude of relevant components pulse, 4 low pass filters can be identified main heart contraction peak.The frequency spectrum of successive analysis data flow calculates signal to noise ratio (S/N) coefficient in addition, to such an extent as to it is to be used for determining whether enough high permission peak value detects and analyzes signal fidelity.
In case the instantaneous position at reflection subassembly pulse and contraction peak is determined, interval T 13 is shunk the time-delay of peak (P1) and ilium peak (P3) and is calculated.In the integrated pulse spectrum, calculate the P2P1 ratio with P2 and contraction peak.
Operational approach
What the system among the present invention was passive turns round under low constant coupling air pressure, for example 40mmhg.After the blood pressure readings that obtains calibrating, equipment is followed the trail of blood pressure by constitutional injection pulse and the tremulous pulse pulse-echo of analyzing left ventricle on the middle phalanxes of middle finger.
System provides during nuclear magnetic resonance pressure measuring value relative, real-time, by shooting.System comprises a trans-impedance amplifier and transducer, Bluetooth adapter, USB digital to analog converter and cable, INISO optical isolator input adapter, the automatic blood pressure alignment unit is being installed for example Windows XP of operating system, Vista, move on the computer of the system of Windows7, pass analogue signal back BIOPAC MP equipment or third party's A/D converter.The HLT100C module of BIOPAC Systems company limited is used for providing optics to isolate to improve the safety of main body the MP150 data-acquisition system of INISO optical isolator input adapter access BIOPAC Systems company limited.
The fingerstall system can be by software control and the transmission data that operate in computer.Communication can be wireless, for example Bluetooth transmission protocol.In a preferred embodiment, digital sensor is designed to characteristic with the miniaturization based on piezoelectric transducer, and is heavy～114 grams, fills once electricity and can move about 12 hours.
Since equipment can follow the trail of from the reflection of cardio-arterial pulse, can prove that it also can follow the trail of aortic blood pressure.Nearest experiment has shown that further present technique especially is suitable as a hemorrhage detector.This is because PAD is particularly suitable for following the trail of pulse pressure, and the pulse pressure sensitive clear and definite sign that to be blood volume reduce,
The signal quality of equipment is enough high, can carry out the contour analysis of detailed radial pulse or finger pulse shape, radial pulse or finger pulse shape are subjected to some factors for example systolic pressure and diastolic pressure, the influence of the pressure resistance effect of arteriectasia and tremulous pulse/small artery interface.Especially, it can differentiate the assembly pulse structure of radial pulse/finger pulse envelope.
Transimpedance amplifier
The 35mm piezoelectric element has about 0.02uF electric capacity generates the voltage of measuring pulse and demarcates about 1v. when 1Hz, and 1V voltage causes about 0.1 μ amp electric current on electric capacity.Gain is the transimpedance amplifier that 1 voltage amplifier is about as much as a Rf=10Mohm.
Frequency domain
Frequency domain of the present invention covers and breathes the heart beating that comprises high frequency from the tranquillization that is in extremely low frequency.Therefore passband is approximately from 100mHz to about 60Hz.
Electric current amplifies
Trans-impedance amplifier converts the electric current input to voltage output.Piezoelectric element replaces charge Q with the tensile stress in the PZT element.So Q=k
13* F.Because dQ/dt=k
13* dF/dt, dQ/dt=i is so the output voltage of trans-impedance amplifier is directly proportional with the time-derivative of power on being applied to sensing element.
If the impulse waveform spectral decomposition becomes one group of sine wave (Fourier transform), basic definition so, dQ/dt=ω * cos (Ω t) provide one significantly true, as ω during near direct current, the derivative of this group SIN function drops to zero with 20dB/decade.Therefore, if replace measuring voltage, measure the electric current of representing charge movement between the short-circuiting electrode, stopping direct current is an inherent character in measuring so, so no longer need electric capacity.
At 100mHz, relative 100M feedback resistance, it is very big that its reactance becomes, and low-frequency cutoff causes the actual gain of circuit to be fallen to direct current.
As if the electric capacity of piezoelectric electrode is in parallel with the active voltage source in the voltage amplification module, and when frequency was in the passband highest frequency, therefore reactance can be ignored greater than 100K.
The frequency domain that uses in this volume tracer covers and breathes the heart beating that comprises high frequency from the tranquillization that is in extremely low frequency.Therefore passband is approximately from 100milliHz to about 60Hz.
The advantage of trans-impedance amplifier circuit
It has eliminated very large input capacitance, is necessary during low frequency thermal drift in eliminating measuring-signal.
Circuit provides a low-down impedance for coming from the external source electromagnetic effect.The high impedance input line that provides of voltage amplifier circuit is extraordinary antenna on the other hand.
Because the time-derivative of the output current representation signal of piezoelectric element, it always is in 0 volt, and maximum gain can be used for the system noise factor is set, and need not fear in the place's signal cut of guide rail Switching Power Supply.
Pass the power supply of the capacity cell of piezoelectric transducer by restriction, the counter electromotive force that does not postpone charge movement in circuit produces, thereby has obtained the maximum linear degree.
It is minimum and size is minimum to be used for the number of components of circuit.
When beginning to load, can on piezometer, see pulsation.The spectral content of pulsation is the main thing of paying close attention to.That is, auscultation (sound of listening internal such as heart and lung to send is to help the diagnosis to some imbalance), oscillographic method (is measured the instrument of vibration, especially blood flow), compare with turbulent structure, all doctors and monitoring side all want to see a disturbance.The present invention pays close attention to perturbations, that is, and and turbulent waveform.Mainly be spectrum analysis, pulse wave is resolved into the formation element, the formation element of waveform is used for deriving and is used to support the data diagnosed.
System compares with palpation, and it is nonsensical being pressed into an air bag in the finger tremulous pulse, because tremulous pulse is too thin, and air bag is big relatively, circle and very soft.Even sharp shaped material is pushed the finger tremulous pulse also almost is nonsensical, because tremulous pulse is too thin, even bone is arranged, is difficult to find tremulous pulse accurately between tip and bone.
Except bone, all things all are slick, move everywhere.Unlike radial artery, find the finger tremulous pulse near being difficult in bone.
The energy of pulse is as the spring arterial wall that stretches.When pulse forward the time, arterial wall is sent back to pulse with energy stored.The elastic vessel wall has a successive energy storage and dispose procedure.Has only very little energy loss when ideally, pulse resembles the blood capillary motion.Storage and discharge can be with the speed of pulse about the 1500m/s steel pipe be reduced to 10m/s in blood vessel.
Claims (23)
1. a static pressure fingerstall is diagnosed supportive device, is used to survey pulse wave, comprise,
An elongated substrate parts, described elongated substrate parts have a pair of relative long side and a pair of relative minor face, about 7 inches to about 13 inches of described a pair of relative long side radius of curvature,
Inflatable part is installed in the front of described elongated member, and described inflatable part has the interior zone that can pressurize,
A pipe is fixed to inflatable part, is connected with the interior zone of described inflatable part is pneumatic,
First hook and loop components is bonded at the front of elongated member, places first limit near the described a pair of relative minor face of described elongated substrate parts,
Described inflatable part places second limit near the described a pair of relative minor face of described elongated member,
Second hook and loop components is bonded at the reverse side of described elongated member.
2. static pressure fingerstall according to claim 1, wherein said substrate parts, inflatable part, pipe has at least one to have polyurethane to constitute.
3. static pressure fingerstall according to claim 1, the length of the long side of wherein said elongated substrate parts is from 3 inches to about 6 inches.
4. static pressure fingerstall according to claim 1, the radius of curvature of first long side of wherein said elongated substrate parts 10 inches in about 13 inches scope, the radius of curvature of described second long side from 10 inches in about 7 inches scopes.
5. static pressure fingerstall according to claim 5, the radius of curvature of first long side of wherein said elongated substrate parts 10 inches in about 12 inches scope, the radius of curvature of described second long side from 10 inches in about 8 inches scopes.
6. static pressure fingerstall according to claim 6, wherein said inflatable part is essentially rectangle, and the effective surface area scope is 0.9 to 2.5 square inch.
7. static pressure fingerstall according to claim 1, wherein said inflatable part is essentially rectangle, and the effective surface area scope is 1.5 to 2 square inch.
8. static pressure fingerstall according to claim 1, wherein said inflatable part is essentially rectangle, and the effective surface area scope is 0.9 to 1.3 square inch.
9. static pressure fingerstall according to claim 10, wherein said ips scope are in 0.05 to 0.075 inch, and the first side length range of the described effective surface area of described inflatable part is 0.6 to 1.2 inch.
10. static pressure fingerstall according to claim 10, the first side length range of the effective coverage of wherein said inflatable part 0.63 inch in 0.88 inch, the length range of second side of the effective coverage of described inflatable part is from 1 inch to 1.5 inches.
11. static pressure fingerstall according to claim 9, the length range of first side of the effective coverage of wherein said inflatable part at 1.25 inches in 0.88 inch, the length range of second side of the effective coverage of inflatable part 2.25 inches in 1.5 inches, described inflatable part the blowing pressure scope from 30mm Hg to not being higher than 60mm Hg.
12. a static pressure fingerstall is diagnosed supportive device, is used to survey pulse wave, comprises,
An elongated substrate parts, described elongated substrate parts have a pair of relative long limit and a pair of relative minor face, about 3 inches to about 6 inches of described a pair of relative long edge lengths,
Inflatable part is installed in the front of described elongated member, the effective coverage area that described inflatable part can be pressurizeed 0.9-2.5 the square inch,
A pipe is fixed to inflatable part, is connected with the interior zone of described inflatable part is pneumatic,
First hook and loop components is bonded at the front of elongated member, places the first side near the elongated substrate parts,
Described inflatable part places the second side near elongated member,
Second hook and loop components is bonded at the reverse side of described elongated member.
13. static pressure fingerstall according to claim 12, wherein said substrate parts and described inflatable part are polyurethane, and wherein said pipe is a polyurethane.
14. static pressure fingerstall according to claim 12, wherein said inflatable part is essentially rectangle, and the effective surface area scope is 0.9 to 1.3 square inch.
15. static pressure fingerstall according to claim 12, wherein said inflatable part is essentially rectangle, the effective surface area scope is 1.5 to 2.25 square inch, and the first side length range of the described effective surface area of described inflatable part is 0.6 to 1.2 inch.
Comprise 16. be used for the static pressure fingerstall of blood flowing characteristic analysis,
An elongated substrate parts, described elongated substrate parts have a pair of relative long limit and a pair of relative minor face, about 3 inches to about 6 inches of described a pair of relative long edge lengths,
Inflatable part is installed in the front of described elongated member, the effective coverage area that described inflatable part can be pressurizeed 0.9 to 2.5 the square inch,
A pipe is fixed to inflatable part, is connected with the interior zone of described inflatable part is pneumatic,
First hook and loop components is bonded at the front of elongated member, places the first side near the elongated substrate parts,
Described inflatable part places the second side near elongated member,
Second hook and loop components is bonded at the reverse side of described elongated member,
A decompression member, decompression member is connected with the inflatable part fluid, is set to open when pressure stage is no more than 1.2psi and release pressure.
17. the static pressure fingerstall that is used for the blood flowing characteristic analysis according to claim 16, one end of wherein said pipe is near inflatable part, the other end is away from inflatable part, described decompression member is one and is attached between the pipe two ends certain any lift valve, be set to open and put pressure when pressure stage reaches 1.1psi.
18. the static pressure fingerstall that is used for the blood flowing characteristic analysis according to claim 16, wherein said decompression member is a fragile part that is bonded on the substrate parts, be connected with the pneumatic element internal flow, when pressure stage reaches 1.1psi, be made as and open and release pressure.
19. use the diagnosis support method of fingerstall, described fingerstall comprises
Elongated substrate parts with a front and a reverse side is installed in the inflatable part in elongated member front, and inflatable part has the interior zone that can pressurize,
Pipe is fixed on the inflatable part and the inner pneumatic communication of inflatable part, and the first of an adapter is bonded at the front of elongated member, and the position is near the first side of elongated member, and the inflatable part position is near the second side of elongated member,
The second portion of adapter is fixed on the reverse side of elongated member.This monitoring method may further comprise the steps:
Point around user with finger sleeve ring,
The first of described adapter and the second portion of described adapter are fixed, make described inflatable part around and firmly contact user finger,
Inflatable part is inflated to the diastolic pressure that pressure is lower than the user, keeps the middle phalanxes of described inflatable part around contact user jewelry simultaneously,
Generation is corresponding to the pressure oscillation of the blood pressure of user
20. method according to claim 19, further comprise with described inflatable part be inflated to pressure at 30mmHg to the step that is no more than in the 60mmHg scope.
21. method according to claim 19, further comprise with described inflatable part be inflated to pressure at 30mmHg to the step that is no more than in the 50mmHg scope.
22. method according to claim 19, following steps have further been comprised, pressure pulse is transferred to pressure transducer from described inflatable part, to simulate output from described pressure transducer and be converted to digital signal, described digital data transmission to computer, is converted to described digital signal the pressure value of correspondence in described computer.
23. the method for claim 19, described user's finger is a thumb.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37266310P | 2010-08-11 | 2010-08-11 | |
| US61/372,663 | 2010-08-11 | ||
| PCT/US2011/047461 WO2012021731A2 (en) | 2010-08-11 | 2011-08-11 | Hydrostatic finger cuff for blood wave form analysis and diagnostic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103220968A true CN103220968A (en) | 2013-07-24 |
Family
ID=45568197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800483730A Pending CN103220968A (en) | 2010-08-11 | 2011-08-11 | Hydrostatic finger cuff for blood wave form analysis and diagnostic support |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2603134A4 (en) |
| CN (1) | CN103220968A (en) |
| WO (1) | WO2012021731A2 (en) |
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| CN106137161A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate and blood pressure measurement apparatus and method |
| CN106137163A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate measurement apparatus and method |
| CN109688912A (en) * | 2017-05-09 | 2019-04-26 | 爱德华兹生命科学公司 | Fingerstall connector |
| CN111386072A (en) * | 2017-09-29 | 2020-07-07 | 菲特比特公司 | Finger blood pressure belt |
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| WO2015024026A1 (en) * | 2013-08-16 | 2015-02-19 | Empirical Technologies Corporation | External calibration and recalibration for a blood pressure monitor |
| CN105852834A (en) * | 2016-06-03 | 2016-08-17 | 广州中科新知科技有限公司 | Blood pressure measurement system and operating method thereof |
| US20190374116A1 (en) * | 2018-06-12 | 2019-12-12 | Edwards Lifesciences Corporation | Finger cuff blood pressure measurement system including a heart reference sensor |
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| CN106137163A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate measurement apparatus and method |
| CN109688912A (en) * | 2017-05-09 | 2019-04-26 | 爱德华兹生命科学公司 | Fingerstall connector |
| CN111386072A (en) * | 2017-09-29 | 2020-07-07 | 菲特比特公司 | Finger blood pressure belt |
| CN111386072B (en) * | 2017-09-29 | 2023-11-28 | 飞比特有限公司 | finger blood pressure belt |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2603134A2 (en) | 2013-06-19 |
| EP2603134A4 (en) | 2017-11-15 |
| WO2012021731A2 (en) | 2012-02-16 |
| WO2012021731A3 (en) | 2012-07-05 |
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