CN210990260U - Probe packaging structure of human body pressure measurement sensor - Google Patents
Probe packaging structure of human body pressure measurement sensor Download PDFInfo
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- CN210990260U CN210990260U CN201921205567.7U CN201921205567U CN210990260U CN 210990260 U CN210990260 U CN 210990260U CN 201921205567 U CN201921205567 U CN 201921205567U CN 210990260 U CN210990260 U CN 210990260U
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Abstract
The utility model discloses a human pressure measurement sensor's probe packaging structure, include: the wire is used for supplying power and transmitting signals to the pressure chip; the protection tube is provided with a groove, one end of the protection tube is hermetically communicated with the plastic guide tube, and the other end of the protection tube is a closed end; the micro PCB is placed in the groove, and a signal output end of the micro PCB is connected with the lead; the pressure chip is placed in the groove, and the sensing surface of the pressure chip is vertical to the opening direction of the groove; the transition lead is connected with the pressure chip and the micro PCB; the gap between the pressure chip and the protection tube is filled with protection glue, and the surface of the pressure chip is filled with the protection glue; and a low-stress medium is filled between the pressure chip and the micro PCB. The utility model discloses the chip external stress that receives is minimum, guarantees that the undulant minimum of sensor output numerical value that the encapsulation is good, time drift is minimum, avoids the short circuit risk, has improved the stability of pressure chip test value to effectual pressure monitoring's precision that has improved.
Description
Technical Field
The utility model relates to a pressure monitoring technical field, specific theory is a human pressure measurement sensor's probe packaging structure.
Background
With the advent of the information age, the sensor technology has become an important technical foundation of the information society, and the sensors are more and more widely applied to the aspect of pressure monitoring in medicine, so that the sensors can further promote the rapid development of medicine in the near future with the maturity of manufacturing technology and the continuous improvement of device performance. The sensor is used as the frontmost device of medical equipment, can convert human physiological signals into medical electrical signals, has wide application in the medical field, and can be used for measuring temperature, blood flow velocity, pressure and the like. The application of the sensor in the detection of the pressure in the human body puts forward higher measurement requirements in the aspect of pressure measurement and shows attractive prospects.
The intracranial pressure monitoring is a real-time monitoring method which utilizes an intracranial pressure monitor and a corresponding sensor to dynamically measure the intracranial pressure of a patient, and records and reflects the intracranial state of the patient in the forms of numerical values, pressure waveform display, alarm and the like. The existing intracranial pressure sensors have the common characteristics that: the monitoring part of the sensor probe is embedded with a pressure chip, and the pressure chip is connected with the lead through a soft transition lead. The internal structure is provided with an air passage which consists of two parts, namely an internal air passage of a sensor metal probe and an internal air passage of a sensor lead, so that the air hole of the pressure chip is communicated with the external atmosphere; when the pressure sensor is used, a probe of the sensor is implanted into brain tissue, the brain tissue applies pressure to a sensing surface of the pressure chip in a cranial cavity, and the pressure causes the maximum deformation of the sensing surface of the chip when the pressure vertically acts on the chip; when the pressure is larger than the atmospheric pressure, the sensing surface of the pressure chip deforms, so that the resistance of the chip changes, the voltage output by the chip changes, and the change signal of the voltage is processed to obtain the intracranial relative pressure value. However, current sensor pressure chip leads to the skew because pressure chip locating position receives the wire influence of being connected with pressure chip when the encapsulation to and the stress that produces such as the transition wire that is connected with pressure chip kick-backs, thereby lead to the problem that easily appears when measuring: 1) the measurement data fluctuation caused by uneven stress during pressure detection is large; 2) the output time drift of the sensor is large; the data collected by the medical pressure sensor cannot truly reflect the intracranial pressure of the patient, so that the judgment of medical care personnel is misled, and the illness state treatment of the patient is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a human pressure measurement sensor's probe packaging structure for solve among the prior art intracranial pressure sensor pressure chip when the encapsulation, because pressure chip locating place receives the wire influence of being connected with pressure chip and leads to the skew, and the stress that produces such as the wire resilience of being connected with pressure chip leads to detecting sensor measured data fluctuation big, the big scheduling problem of drift, leads to measured data can not truly reflect intracranial pressure.
The utility model discloses a following technical scheme solves above-mentioned problem:
a probe packaging structure of a human body pressure measurement sensor comprises:
the lead is arranged in the plastic conduit, and the first end of the lead is connected with the signal processing circuit;
the protection tube is provided with a groove, one end of the protection tube is communicated with the plastic guide tube in a sealing way, and the other end of the protection tube is a closed end part;
the micro PCB is placed in the groove, and a signal output end of the micro PCB is connected with the second end of the lead;
the pressure chip is placed in the groove, arranged on one side of the micro PCB along the opening direction of the groove, and the sensing surface of the pressure chip is vertical to the opening direction of the groove and faces to the outer side of the groove;
the transition lead is connected with the signal output end of the pressure chip and the signal input end of the micro PCB and used for transmitting electric signals;
a low-stress medium is filled between the pressure chip and the micro PCB;
the pressure chip and the protection tube groove side wall gap are filled with protection glue, the surface of the pressure chip perpendicular to the groove opening direction is filled with protection glue, and the pressure chip is in a suspended state in the groove.
The principle is as follows:
the miniature PCB is placed in the groove, the protective glue is used for fixing the miniature PCB with the side wall of the protective tube and performing insulation protection, the pressure chip and the miniature PCB below the pressure chip are connected and initially fixed through the transition wire, the gap between the pressure chip and the protective tube is filled with the protective glue, and the pressure chip is fixed in the groove in a suspended state through the supporting force of the transition wire and the protective glue. The problem of because pressure chip locating position receives the wire influence that is connected with pressure chip and leads to the skew to and the stress that produces such as rebounding with pressure chip connecting wire causes that the measuring data of detection sensor fluctuates greatly, drift is big and leads to measuring data can not truly reflect intracranial pressure is solved. When any micro deformation of the protection tube acts on the pressure chip through the protection glue, the pressure chip is only pulled in the horizontal direction parallel to the sensing surface of the chip, and the pressure chip is not pulled in the vertical direction of the sensing surface of the pressure chip, so that the minimum external stress of the pressure chip is ensured, and the accuracy of the strain test is improved. The protective adhesive plays roles of insulation protection and initial fixation, and comprises but is not limited to epoxy adhesive, silica gel and the like, so that the side wall of the pressure chip is effectively isolated from the side wall of the groove of the protective tube, the risk of short circuit is avoided, the stability of the test value of the pressure chip is improved, and the precision of intracranial pressure monitoring is effectively improved. Furthermore, a low-stress medium is filled between the bottom of the pressure chip and the miniature PCB, and the low-stress medium comprises non-corrosive gas, low-stress silica gel or oil liquid and the like, wherein the non-corrosive gas comprises dry gas, inert gas and the like, so that the pressure chip and the miniature PCB are protected in an insulating manner, and the intracranial pressure monitoring precision is further improved.
Further, the closed end is a closed end integrally formed with the protection tube.
Furthermore, the joint of the protection tube and the plastic guide tube is encapsulated with protection glue. The pressure chip sensing surface is also encapsulated with protective glue, so that the protective tube can be in smooth transition when extending into the human body. The protective glue has lubricating and protecting functions, and can adopt silica gel or epoxy glue.
Further, the protection tube is made of a relatively magnetically inert and biocompatible material, and the relatively magnetically inert and biocompatible material includes titanium-based metal, cobalt-based metal, ceramic or Peek polymer material, and the like.
The biocompatible material has no sensitization, carcinogenesis and distortion when contacting with human body, and can be well combined with bone tissue, epithelium and connective tissue.
Further, the transition wire is a metal wire with low resistance (high conductivity) such as gold and silver with a diameter of not more than 35 μm. The advantages are that: with good electrical conductivity and very low stress. Further, the medium with the minimum stress is low-stress silica gel, non-corrosive gas or oil.
Further, the protective adhesive is silica gel or epoxy adhesive and the like.
Furthermore, the outer surface of the plastic catheter is provided with scale marks, so that the implantation depth can be observed conveniently during use.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model discloses the clearance packing protection between on the well pressure chip and the protection tube is glued, and when making any small deformation of protection tube glue and act on pressure chip through the protection, only have the tractive to pressure chip at the horizontal direction parallel with the chip response face, and can not have tractive pressure chip external stress that receives minimum at pressure chip response face vertical direction to guarantee that the sensor output numerical value that encapsulates is undulant minimum, time drift is minimum.
(2) The protective rubber has insulativity, so that the side wall of the pressure chip is effectively isolated from the side wall of the groove of the protective tube, the risk of electric leakage is avoided, the stability of a test value of the pressure chip is improved, and the precision of intracranial pressure monitoring is effectively improved.
(3) The utility model discloses a transition wire carries out initial fixation for pressure chip for it is convenient for adjust chip position at the installation, and the transition wire chooses for use high conductivity materials such as gold, silver.
Drawings
Fig. 1 is a top view of the present invention;
FIG. 2 is a sectional view of the structure of the present invention;
FIG. 3 is a structural cross-sectional view of another embodiment of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 2 taken along the line A-A;
wherein, 1-plastic conduit; 2-protecting the tube; 3-a pressure chip; 4-micro PCB; 5-a wire; 6-transition wire.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1:
referring to fig. 1, 2 and 4, a probe packaging structure of a body pressure measurement sensor includes:
the lead 5 is arranged in the plastic conduit 1, and the first end of the lead 5 is connected with the signal processing circuit;
the protection tube 2 is provided with a groove, one end of the protection tube 2 is hermetically communicated with the plastic guide tube 1, and the other end of the protection tube is a closed end;
the miniature PCB4 is placed in the groove, the size of the miniature PCB4 is matched with the inner diameter of the protection tube 2 so as to be placed in the groove, the protective glue is filled in the gap between the miniature PCB4 and the side wall of the protection tube 2 so as to fix the position of the miniature PCB4, and the signal output end of the miniature PCB4 is connected with the second end of the lead 5;
the pressure chip 3 is placed in the groove, the sensing surface of the pressure chip 3 is perpendicular to the opening direction of the groove, and the sensing surface of the pressure chip 3 faces the outer side of the groove;
the transition lead 6 is connected with the signal output end of the pressure chip 3 and the signal input end of the micro PCB4 and used for electric signal transmission, the pressure chip 3 is suspended in the groove and arranged on one side of the micro PCB4 along the opening direction of the groove, as shown in fig. 3, the transition lead 6 can be arranged on one side close to or far away from the closed end;
and the pressure chip 3 and the side wall of the groove of the protection tube 2 are filled with protective glue in a gap, and the surface of the pressure chip 3 perpendicular to the opening direction of the groove is filled with protective glue.
And a low-stress medium is filled between the pressure chip 3 and the micro PCB.
Miniature PCB4 places in the recess to adopt the protection glue to fix it and the lateral wall of protection tube 2 with it and insulation protection, utilize transition wire 6 to be connected initial fixation with pressure chip 3 and miniature PCB4 rather than the below, the clearance packing protection glue between on the pressure chip 3 and the protection tube 2, pressure chip 3 utilizes the holding power of transition wire 6 and the gluey fixing of protection to be unsettled state in the recess. The problems that the placement position of the pressure chip 3 is affected by a wire connected with the pressure chip 3 to cause deviation, and the stress generated by the rebound of the transition wire 6 connected with the pressure chip 3 and the like causes large fluctuation of the measurement data of the detection sensor, and the measurement data can not truly reflect the intracranial pressure are solved. When any micro deformation of the protection tube 2 acts on the pressure chip 3 through the protection glue, the pressure chip 3 is only pulled in the horizontal direction parallel to the sensing surface of the pressure chip 3, and the pressure chip 3 cannot be pulled in the vertical direction of the sensing surface, so that the minimum external stress of the pressure chip 3 is ensured, and the accuracy of the strain test is improved. The protection glue plays insulating protection and initial fixed effect, including but not limited to epoxy glue, silica gel etc. make 3 lateral walls of pressure chip and the effectual isolation of the recess lateral wall of protection tube 2, can not produce the risk of short circuit, improved the stability of 3 test values of pressure chip to the effectual precision that has improved human pressure monitoring. Furthermore, a low-stress medium such as non-corrosive gas, low-stress silica gel or oil is filled between the bottom of the pressure chip 3 and the micro PCB4, so that the pressure chip 3 and the micro PCB4 are protected in an insulating manner, and the accuracy of monitoring the human body pressure is further improved.
It is worth to be noted that the probe packaging structure is not only used for intracranial pressure monitoring, but also applicable to pressure monitoring of other parts of human body.
Example 2:
on the basis of embodiment 1, the closed end is a closed end integrally formed with the protective tube 2.
Furthermore, the outer layers of the protection tube 2 and the closed end are both made of relatively magnetic inert and biocompatible materials, the relatively magnetic inert materials do not contain magnetic metals such as iron, the relatively magnetic inert and biocompatible materials comprise titanium-based metals, cobalt-based metals, ceramics or Peek high polymer materials, the phenomena of sensitization, carcinogenesis and distortion are avoided when the relatively magnetic inert and biocompatible materials are in contact with a human body, and the relatively magnetic inert and biocompatible materials can be well combined with bone tissues, epithelia and connective tissues.
Example 3:
on the basis of the embodiment 1, the closed end is a closed end head made of packaging soft rubber, and further, the notch formed by the height difference between the sensing surface of the pressure chip 3 and the protective tube 2 is also encapsulated with the packaging soft rubber, so that the protective tube 2 can be in smooth transition when extending into the human body. The packaging soft adhesive has lubricating and protecting functions, also belongs to protective adhesive, and can adopt silica gel or epoxy adhesive.
Example 4:
on the basis of example 1, the transition wire 6 is a low-resistance metal wire having a diameter of not more than 35 μm, such as a gold wire, a silver wire, or an aluminum wire.
Furthermore, the outer surface of the plastic catheter 1 is provided with scale marks, so that the implantation depth can be observed conveniently during use.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are merely preferred embodiments of the present invention, it is to be understood that the present invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (9)
1. A probe packaging structure of a human body pressure measurement sensor is characterized by comprising:
the lead is arranged in the plastic conduit, and the first end of the lead is connected with the signal processing circuit;
the protection tube is provided with a groove, one end of the protection tube is communicated with the plastic guide tube in a sealing way, and the other end of the protection tube is a closed end part;
the micro PCB is placed in the groove, and a signal output end of the micro PCB is connected with the second end of the lead;
the pressure chip is placed in the groove and arranged on one side of the micro PCB along the opening direction of the groove, and the sensing surface of the pressure chip is vertical to the opening direction of the groove;
the transition lead is connected with the signal output end of the pressure chip and the signal input end of the micro PCB and used for transmitting electric signals;
a low-stress medium is filled between the pressure chip and the micro PCB;
the pressure chip and the protection tube groove side wall gap are filled with protection glue, the surface of the pressure chip perpendicular to the groove opening direction is filled with protection glue, and the pressure chip is in a suspended state in the groove.
2. The probe packaging structure of the human body pressure measurement sensor according to claim 1, wherein a protective glue is packaged at the joint of the protective tube and the plastic conduit.
3. The probe package structure of claim 1, wherein the protective tube is made of a relatively magnetically inert and biocompatible material.
4. The probe package structure of claim 3, wherein the relatively magnetically inert and biocompatible material is titanium-based metal, cobalt-based metal, ceramic, or PEEK polymer.
5. The probe package structure of claim 1, wherein the transition wire is a metal wire with a diameter or width of not more than 35 μm.
6. The probe package structure of the human body pressure measurement sensor according to claim 5, wherein the metal wire is made of a high conductivity metal.
7. The probe encapsulation structure of the human body pressure measurement sensor according to claim 1, wherein the low-stress medium is low-stress silica gel, non-corrosive gas or oil.
8. The probe encapsulation structure of the human body pressure measurement sensor according to claim 1, wherein the protective adhesive is a silicone adhesive or an epoxy adhesive.
9. The probe packaging structure of the human body pressure measurement sensor according to claim 1, wherein the outer surface of the plastic conduit is provided with scale marks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921205567.7U CN210990260U (en) | 2019-07-29 | 2019-07-29 | Probe packaging structure of human body pressure measurement sensor |
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| CN201921205567.7U CN210990260U (en) | 2019-07-29 | 2019-07-29 | Probe packaging structure of human body pressure measurement sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110279409A (en) * | 2019-07-29 | 2019-09-27 | 成都拓蓝精创医学技术有限公司 | A kind of probe encapsulating structure of human pressure's measurement sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110279409A (en) * | 2019-07-29 | 2019-09-27 | 成都拓蓝精创医学技术有限公司 | A kind of probe encapsulating structure of human pressure's measurement sensor |
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