CN2074163U - Dynamic monitor for measuring dilution and oxygen saturation of flood during extracorporeal circulation - Google Patents
Dynamic monitor for measuring dilution and oxygen saturation of flood during extracorporeal circulation Download PDFInfo
- Publication number
- CN2074163U CN2074163U CN 89220729 CN89220729U CN2074163U CN 2074163 U CN2074163 U CN 2074163U CN 89220729 CN89220729 CN 89220729 CN 89220729 U CN89220729 U CN 89220729U CN 2074163 U CN2074163 U CN 2074163U
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- CN
- China
- Prior art keywords
- oxygen saturation
- infrared
- amplifier
- extracorporeal circulation
- frequency
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to a medical monitoring instrument, which comprises an infrared sensor, an infrared modulation transmitting circuit, a frequency selection amplifying circuit, a function amplifier and a display device. Dynamic monitoring is conducted for the dilution and oxygen saturation of flood in the process of extracorporeal circulation. The concentration of blood cells is detected by turbidimetry, and the oxygen saturation of flood is detected according to the different infrared absorptivity of the oxygenated hemoglobin and reduced hemoglobin. Two parameters can be detected by the same sensor; the utility model has the advantages of simple structure and one machine with multifunction.
Description
This utility model reaches the pick off of being made up of light-sensitive element, optical filter by infrared light modulation transmitter, frequency-selecting receiving circuit, function amplifier and constitutes.This device is mainly used in extracorporeal circulation, and the hemodilution degree in its process, blood oxygen saturation are carried out continuous dynamic monitoring.
Look into domestic and international interrelated data and patent documentation and do not see that as yet hemodilution degree dynamic monitor is arranged, so far in the domestic extracorporeal circulation hemodilution degree monitoring method is remained interruption and extract blood specimen, destroy hemocyte with chemical method, reuse COLORIMETRY METHOD IN HEMOGLOBIN DETERMINATION content is inferred instant hemodilution situation with this.
Gas-stat courage and uprightness monitoring device produced in USA and SO2% blood oxygen saturation monitoring device cost an arm and a leg, need be series at special joint on the monitored blood conduit, the Installation and Debugging complicated operation, even also need special chemical drugs to carry out adjustment before use, need the time longer, and all disposable use of this special fit, cost is higher.So at present domestic only indivedual R﹠D institution purchases and uses this instrument, also only uses in indivedual scientific research tasks.In China's extracorporeal circulation at present the monitoring method of artificial lung oxygenate situation and perfused tissue situation is still to be interrupted and extracts the artery and vein blood specimen and make blood gas analysis.In every routine extracorporeal circulation process These parameters is needed repeatedly to check, because each complicated operation of checking, needed 10～20 minutes just can see the result, can not satisfy the needs of extracorporeal circulation, because every routine extracorporeal circulation can be finished in 1～2 hour, some cases finishes also not see assay in the turn of tidal stream until operation, has lost the directive significance of laboratory examination to clinical perfusion.In addition, blood drawing increases infection chance repeatedly, and repeatedly checking has increased patient economy burden.
The purpose of this utility model is to develop a kind of dynamic monitor of hemodilution degree blood oxygen saturation, remove complicated chemical examination program from, can understand hemodilution situation, artificial lung oxygenate situation, perfused tissue situation timely and accurately, make extracorporeal circulation be reduced to minimum level, reduce infection chance so that in time adjust the perfusion index, reduce medical expense the damage of human body.The purpose of this utility model also is to develop a kind of easy to use, need not increase other auxiliary joint in pipeline, does not promptly change conventional method for filling, without any need for debugging the monitoring device that can directly apply in the extracorporeal circulation.The requirement source of data is wide, and is cheap, popularizes easily and uses, and transforms fields such as can also being used for the hemodialysis clinic check a little.
Shown in figure (1), the pick off of this device (2) is by infrared emission tube (3), optical filter (4), and infrared receiver tube (5), (24) and sensor outer housing (25) are formed.Modulation of infrared rays circuit (1) is delivered to transmitting tube (3) with the characteristic frequency pulse makes it luminous, this bundle light passes across the plastic, transparent pipeline (26) that is full of blood, filter interference light through optical filter (4), be radiated at that receiving tube (5) is gone up and light intensity is converted into the signal of telecommunication and send into the frequency-selective amplifier of being made up of operational amplifier (7) and decoder (8) etc.s (6a) and carry out the frequency-selecting amplification, the numerical value of change resistance (9) can make the receive frequency of this amplifier identical with the frequency of agitator (1).The signal of telecommunication after the demodulation is sent into the level translator of being made up of amplifier (11) etc. (10a) output signal is become suitable numerical value.Zero-regulator resistor (12) is in order to eliminate DC component.Further amplify through function amplifier (13a) again, make output voltage and hematochrome or packed cell volume linear, adjustable resistance (15) can be determined the output voltage limit value of integrated circuit (14), output voltage is delivered to display (16), numeral shows content of hemoglobin or packed cell volume value at once, another part dividing potential drop of output voltage is delivered to alarm device (17), when the hemodilution degree reached predetermined alarming value, the window circuit of being made up of amplifier (19a, 19b) triggered warning circuit realization sound, light warning with output alarm signal.Wherein luminous tube (20a, 20b) is the light alarm lamp, and amplifier (21), electric capacity (22) and Yang Shengqi (23) form the audible alarm circuit.The detection principle is: the tube wall of tested pipeline (26) is transparent, and the thickness of tube wall and the internal diameter of pipeline immobilize, and so, the light intensity that infrared receiver tube (5) is received then weakens along with the increase of pipeline inner cell number, otherwise then strengthens.Receiving tube (5) signal of telecommunication voltage amplitude of sending into frequency-selective amplifier (6a) will and change along with RBC number purpose increase and decrease in the hemodilution process like this, the voltage of output also will change thereupon after function amplifier (13a) is handled again, thereby, realized the dynamic monitoring of hemodilution degree and the warning of predetermined value.
Blood oxygen saturation monitoring part is that strong and oxygen and the hemoglobin principle a little less than to infrared ray absorbing power designs to ultrared absorbing power according to reduced hemoglobin.As shown in Figure 1, directly pass pipeline (26) by the modulated infrared major part that infrared emission tube (3) sends, and having the part infrared ray on transparent tube wall and interface that the pipeline inner blood contacts, to reflect, infrared receiver tube (24) is arranged on the angle of reflection of transmitting tube (2).The blood color is black by red stain when reduced hemoglobin increases, ultrared absorbing power is strengthened, be that most of infrared ray is absorbed, the reflected infrared ray that infrared receiver tube (24) is received reduces, when HbO2 Oxyhemoglobin increased, the blood color reddened, and ultrared absorbtivity is reduced, the light intensity that reflexes on the receiving tube (24) increases, and receiving tube (24) also changes the intensity that optical signal becomes the signal of telecommunication along with the variation of blood oxygen saturation like this.The signal of telecommunication of this variation is sent into frequency-selective amplifier (6b) and is carried out the frequency-selecting amplification, through level translator (10b) output voltage being transformed into suitable numerical value handles this signal of telecommunication through function amplifier (13b) again, make the shown blood oxygen saturation percentage ratio of percentage ratio that HbO2 Oxyhemoglobin increases and output voltage consistent, delivering to display (16b) at last shows, its numerical value is the blood oxygen saturation value, thereby has realized the dynamic monitoring of blood oxygen saturation.
Display ((16a, 16b) is digital voltmeter, and also available needle dc voltmeter is the auxilliary functional select switch of establishing when the shared display of two kinds of monitoring functions, also can in establish intervalometer to two kinds of monitored indexs automatically conversion show in turn.
Sensor construction quarrel Fig. 2, its two side (27) of placing the notch of tested pipeline (26) is plane, pipeline is put into through bayonet socket (28), and restriction conduit is in groove.
Description of drawings:
Fig. 1, monitor functional-block diagram
Fig. 2, sensor arrangement figure
1, agitator (modulation of infrared rays device)
2, pick off
3, infrared emission tube
4, optical filter
5, infrared receiver tube (hemodilution part)
6a, 6b, frequency-selective amplifier
7, operational amplifier
8, decoder
9, adjustable resistance
10a, 10b, level translator
11, operational amplifier
12, adjustable resistance
13a, 13b, function amplifier
14, function amplifier integrated circuit
15, adjustable resistance
16a, 16b, display
17a, 17b, alarm
18a, 18b, adjustable resistance
19a, 19b, operational amplifier
20a, 20b, light emitting diode
21, operational amplifier
22, electric capacity
23, speaker
24, infrared receiver tube (blood oxygen saturation part)
25, sensor outer housing
26, tested pipeline
27, pick off notch inwall
28, pipeline bayonet socket
Claims (5)
1, this utility model is to receive amplifying circuit by pick off, infrared light modulation transmitter and frequency-selecting to constitute, and it is characterized in that:
Infrared emission tube (3) constitutes the correlation relation with the adapter (5) that detects the hemodilution degree, takes over (24) with the infrared ray of blood oxygen saturation detection usefulness and constitutes reflective relation.
The light source of two receiving tubes (4), (9) can be same transmitting tube (3).
2, monitor according to claim 1 is characterized in that pick off has the notch (27) that can place detected pipeline, and its two side (28) are plane, have restriction conduit and deviate from the narrow of usefulness (29).
3, monitor according to claim 1 is characterized in that using agitator (1) to realize the infrared light modulation, and the mid frequency of frequency-selective amplifier (5), (10) equates with agitator (1).
4, monitor according to claim 1 is characterized in that having the hemodilution degree and presets alarm device (17a), also has blood oxygen saturation presetter device (17b).
5, monitor according to claim 1, it is characterized in that having function amplifier (hemodilution degree part) 13a, function amplifier (blood oxygen saturation part) 13b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89220729 CN2074163U (en) | 1989-12-12 | 1989-12-12 | Dynamic monitor for measuring dilution and oxygen saturation of flood during extracorporeal circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89220729 CN2074163U (en) | 1989-12-12 | 1989-12-12 | Dynamic monitor for measuring dilution and oxygen saturation of flood during extracorporeal circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2074163U true CN2074163U (en) | 1991-04-03 |
Family
ID=4875350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89220729 Withdrawn CN2074163U (en) | 1989-12-12 | 1989-12-12 | Dynamic monitor for measuring dilution and oxygen saturation of flood during extracorporeal circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2074163U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425197C (en) * | 2002-01-31 | 2008-10-15 | 拉夫伯勒大学企业有限公司 | Venous pulse oximetry |
| CN101616628B (en) * | 2006-12-01 | 2012-07-18 | 赫格雷(大连)制药有限公司 | Methods and systems for detecting a condition of compartment syndrome |
| CN111323381A (en) * | 2020-04-14 | 2020-06-23 | 深圳联开生物医疗科技有限公司 | Background voltage self-adaption method, measuring method, cell analyzer and storage medium |
-
1989
- 1989-12-12 CN CN 89220729 patent/CN2074163U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425197C (en) * | 2002-01-31 | 2008-10-15 | 拉夫伯勒大学企业有限公司 | Venous pulse oximetry |
| CN101616628B (en) * | 2006-12-01 | 2012-07-18 | 赫格雷(大连)制药有限公司 | Methods and systems for detecting a condition of compartment syndrome |
| CN111323381A (en) * | 2020-04-14 | 2020-06-23 | 深圳联开生物医疗科技有限公司 | Background voltage self-adaption method, measuring method, cell analyzer and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |