CN108013870A - A kind of invasive blood pressure Acquisition Circuit - Google Patents
A kind of invasive blood pressure Acquisition Circuit Download PDFInfo
- Publication number
- CN108013870A CN108013870A CN201711474884.4A CN201711474884A CN108013870A CN 108013870 A CN108013870 A CN 108013870A CN 201711474884 A CN201711474884 A CN 201711474884A CN 108013870 A CN108013870 A CN 108013870A
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- invasive
- pressure sensor
- circuit
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- 230000036772 blood pressure Effects 0.000 title claims abstract description 22
- 238000002955 isolation Methods 0.000 claims abstract description 45
- 239000011324 bead Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000004872 arterial blood pressure Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 101150075681 SCL1 gene Proteins 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 101150111792 sda1 gene Proteins 0.000 description 2
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001746 atrial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000035487 diastolic blood pressure Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000007917 intracranial administration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000035488 systolic blood pressure Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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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
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
-
- 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
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
Abstract
The invention discloses a kind of invasive blood pressure Acquisition Circuit, including invasive pressure sensor body, invasive pressure sensor is set in the invasive pressure sensor body, the identification module with identification code is additionally provided with the invasive pressure sensor body, the output terminal connection IBP circuits of the invasive pressure sensor, the output terminal connection sensor interface isolation circuit of the identification module, the output terminal of the sensor interface isolation circuit is connected with MCU processors, the MCU processors connect main control module, the output terminal of the IBP circuits is connected with main control module, the MCU processors are used for the identification code for reading identification module, and identification code is sent to main control module, the main control module is used for the service condition that the invasive pressure sensor is judged according to identification code.Whether the invasive pressure sensor that may determine that connection is to use first, prevents the situation for reusing disposable invasive pressure sensor.
Description
Technical field
The invention belongs to invasive monitoring of blood pressure technical field, more particularly to a kind of invasive blood pressure Acquisition Circuit.
Background technology
Invasive monitoring of blood pressure technology can realize the monitoring that real-time change is carried out to blood pressure, such as suffer a shock disease in urgent patient
When people, some openheart surgeries and other capital operations, it is with the time is fast, result is accurate, anti-interference strong and have a wide range of application
Feature, therefore invasive monitoring of blood pressure technology has critically important clinical value.Invasive blood pressure can generally monitor arterial pressure, center
Vein pressure, pulmonary arterial pressure, PLA left atrial pressure and intracranial pressure；Its measuring principle is：Conduit is placed in tested position by puncturing first
Intravascular, the outer end of conduit is directly connected with pressure sensor, since fluid is with pressure transmission effect, endovascular pressure
It will be delivered to by the liquid in conduit on the pressure sensor of outside, so as to obtain the dynamic of intravascular real-time pressure change
Waveform, by specific computational methods, can obtain systolic pressure, diastolic pressure and the mean arterial pressure of tested position blood vessel.
Invasive pressure sensor is disposable, if infection even life security can be produced by reusing, but it is existing
Invasive pressure sensor generally by manually taking care of, it is separated to used invasive pressure sensor, but existing
Whether the invasive pressure sensor having can not automatic decision be before use to use first.
The content of the invention
For above-mentioned technical problem, the present invention proposes a kind of invasive blood pressure Acquisition Circuit, it can be determined that connection
Invasive pressure sensor whether be to use first, prevent the situation for reusing disposable invasive pressure sensor.
The technical scheme is that：
A kind of invasive blood pressure Acquisition Circuit, including invasive pressure sensor body, the invasive pressure sensor body is interior to be set
Invasive pressure sensor, is additionally provided with the identification module with identification code in the invasive pressure sensor body, described invasive
The output terminal connection IBP circuits of pressure sensor, the output terminal connection sensor interface isolation circuit of the identification module are described
The output terminal of sensor interface isolation circuit is connected with MCU processors, and the MCU processors connect main control module, the IBP electricity
The output terminal on road is connected with main control module, and the MCU processors are used for the identification code for reading identification module, and identification code is sent
To main control module, the main control module is used for the service condition that the invasive pressure sensor is judged according to identification code.
Preferably, the output terminal of the IBP circuits is connected by level shifting circuit with main control module, the MCU processing
Device is connected by level shifting circuit with main control module.
Preferably, the sensor interface isolation circuit includes power isolation circuit and signal isolation circuit, for isolating
Identification module.
Preferably, the power isolation circuit includes DC-DC isolated power supply modules, the DC-DC isolated power supplies module
Input terminal connects the first filter circuit, and output terminal connects the second filter circuit, and first filter circuit includes the electricity of parallel connection first
Hold and the second capacitance, the first magnetic bead of connecting between first capacitance and the second capacitance, second filter circuit are included successively simultaneously
The zener diode of connection, the 3rd capacitance, the 4th capacitance and the 5th capacitance, connect second between the zener diode and the 3rd capacitance
Magnetic bead.
Preferably, the signal isolation circuit includes signal isolation IC, the signal isolation IC connections anti-static function electricity
Road and signal filter circuit.
Preferably, the main control module is inquired to MCU processors, and MCU processors detect whether invasive pressure sensor connects
Connect, the identification code of identification module is read if connection, and be back to main control module, main control module judges invasive according to back information
Whether pressure sensor correctly connects, if correctly connecting, carries out signal processing to pressure acquisition data, pressure is calculated and be shown
Force data；If incorrect connection, prompting sensor is not connected with or sensor error, and sends detection sensor to MCU processors
Order.
Compared with prior art, it is an advantage of the invention that：
Whether the invasive pressure sensor that the 1st, may determine that connection is to use first, prevents the disposable invasive pressure of reuse
The situation of force snesor.It may insure the safety of patient and improve the accuracy of invasive blood pressure data.
2nd, sensor interface isolation circuit includes power isolation circuit and signal isolation circuit, can effectively and pressure sensing
Device identification chip is isolated, and ensures safety.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is principle of the invention block diagram；
Fig. 2 is the circuit diagram of power isolation circuit in the present invention；
Fig. 3 is the circuit diagram of signal isolation circuit in the present invention；
Fig. 4 is MCU processor circuits schematic diagram in the present invention；
Fig. 5 is level shifting circuit schematic diagram in the present invention；
Fig. 6 is master control borad invasive blood pressure acquisition logic flow chart in the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment：
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is described further.
As shown in Figure 1, a kind of invasive blood pressure Acquisition Circuit, including the invasive pressure sensor with identification chip, IBP electricity
Road, sensor interface isolation circuit, MCU processors, level shifting circuit and master control borad composition.Wherein MCU is responsible for reading invasive
The identification code stored in pressure sensor inside identification chip, and identification code is sent to host computer, host computer is according to receiving
Identification code judge the service condition of the sensor.The output terminal of the invasive pressure sensor is defeated with IBP circuits respectively
The input terminal for entering end with sensor interface isolation circuit is connected, the output terminal of the sensor interface isolation circuit and MCU processing
The I/O port of device is connected, and the I/O port of the MCU processors is connected with level shifting circuit, the output terminal of the IBP circuits and
Level shifting circuit is connected, and the output terminal of the level shifting circuit is connected with the serial ports of master control borad.
The realization of sensor interface isolation circuit is isolated with pressure sensor identification chip, including power isolation circuit and letter
Number isolation circuit.Power isolation circuit as shown in Fig. 2, using DC-DC isolated power supply module U1, the chip with 6kVDC every
Ionization voltage, and maximum patient leakage current only has 2uA.At the same time the power module by the 5V voltage conversions of input into 3.3V, can be direct
Power to identification chip, eliminate the reduction voltage circuit of centre.Power isolation circuit includes capacitance C1, C2, C3, C4, C5, magnetic every
U1, zener diode Z1 and magnetic bead FB1, FB2.
Power isolation circuit includes the power filtering module 1 that capacitance C1, C2 and magnetic bead FB1 are formed, capacitance C3, C4, C5, magnetic
The power filtering module 2 of pearl FB2 and zener diode Z1 compositions.Input terminal of the output terminal and magnetic of power filtering module 1 every U1
It is connected, magnetic is connected every the output terminal of U1 with the input terminal of power filtering module 2.
For signal isolation circuit as shown in figure 3, using U2, which is dedicated I2C interface isolating chip, has 5kVDC
Isolation voltage.Signal isolation circuit includes resistance R1, R2, R3, R4, R5, R6, capacitance C6, C7, C8, magnetic bead FB3, FB4,
FB5, FB6 and two-way TVS diode TVS1.
Signal isolation circuit includes the pull-up resistor module that is made of R1, R2, R3, R4, by two-way TVS diode TVS1,
R5, R6 composition anti-static function module, by magnetic bead FB3, FB4, FB5, FB6 signal filter module formed and signal isolation
ICU2.Pin SDA1, SCL1, SDA2 and SCL2 of signal isolation ICU2 is connected with pull-up resistor R2, R1, R3, R4 respectively, chip
The pin SDA2 and SCL2 of U2 is connected with the cathode of anti-static function module, and the anode of anti-static module is connected to ground.Chip U2
Pin VDD2, SDA2, SCL2 and GND4 be connected respectively with magnetic bead FB3, FB4, FB5, FB6 of signal filter module, signal filter
The output terminal of ripple module is the output terminal of signal isolation circuit.
Power isolation circuit is powered after supply voltage is isolated to U2, VDD2, SDA2, SCL2, GND2 and invasive pressure in Fig. 3
Identification module inside force snesor is connected, and the identification module circuit in pressure sensor is isolated by U2, the signal after isolation
SDA1, SCL1 are connected to the I/O port of MCU processors.
MCU processor circuits are as shown in Figure 4.The circuit include resistance R7, R8, R9, R10, R11, R12, R13, R14,
R15, R16, capacitance C9, C10, C11, C12, C13, C14, C15, C16, C17, MCU processors U3, no source crystal oscillator Y1.Circuit is adopted
With 3.3V power voltage supplies, external 8MHz without source crystal oscillator.I2C communication port in this circuit reads the storage information of sensor,
RX, TX port in its USART1 is used for the serial communication with master control borad, for the information of master control borad transmission sensor.MCU
Processor is responsible for reading the information of identification code stored in invasive pressure sensor inside identification module, and then the I/O port of MCU passes through
Level shifting circuit sends information to host computer.
IBP circuits and MCU circuits are Transistor-Transistor Logic level, its operating voltage is 3.3V.And the USART interfaces of main control module are
RS232 level, it is therefore desirable to level shifting circuit.Level conversion operating circuit is as shown in Figure 5 in the design.Circuit includes level
Conversion IC U4, capacitance C18, C19, C20, C21, C22, Transistor-Transistor Logic level is inputted in the pin 9,10,11,12 of U4, pin 7 from U4,
8th, 13,14 output RS232 level, is directly connected with main control module.
Referring to Fig. 6, the output signal of invasive pressure sensor and identification module during work inside invasive blood pressure sensor
It is respectively outputted to two branches, the pressure signal connection IBP circuits of invasive pressure sensor output, IBP circuit filterings amplification electricity
Road and passage switching switch circuit composition, by invasive blood pressure signal by filtering, amplifying, AD conversion input MCU processor progress
Computing is handled, pressure data is finally calculated.What identification module exported is signally attached to sensor interface isolation circuit, including
Power isolation circuit and signal isolation circuit.Then identification signal is inputted into MCU processors, MCU processors judge that sensor is known
Whether other circuit connects, and sensor identification code is read if connection, and send identification code to upper by level shifting circuit
Machine.The pressure data of IBP circuit outputs is also communicated to level shifting circuit, and Transistor-Transistor Logic level is converted to RS232 by level shifting circuit
Level, outputs a signal in host computer.Host computer carries out judging whether sensor is connected with identification code by when both
All meet, then start to analyze pressure data, be calculated and be shown on a display screen.If being not properly connected together, system prompt sensor
Not connected or sensor mismatches alarm signal, and continues slave computer and send detection sensor order, until connecting correctly
Sensor.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Principle, without being construed as limiting the invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole changes fallen into scope and border or this scope and the equivalents on border and repairing
Change example.
Claims (6)
1. a kind of invasive blood pressure Acquisition Circuit, including invasive pressure sensor body, set in the invasive pressure sensor body
It is equipped with wound pressure sensor, it is characterised in that be additionally provided with the identification with identification code in the invasive pressure sensor body
Module, the output terminal connection IBP circuits of the invasive pressure sensor, the output terminal connection sensor interface of the identification module
Isolation circuit, the output terminal of the sensor interface isolation circuit are connected with MCU processors, and the MCU processors connect master control
Module, the output terminal of the IBP circuits are connected with main control module, and the MCU processors are used for the identification code for reading identification module,
And send identification code to main control module, the main control module is used for the use that the invasive pressure sensor is judged according to identification code
Situation.
2. invasive blood pressure Acquisition Circuit according to claim 1, it is characterised in that the output terminal of the IBP circuits passes through
Level shifting circuit is connected with main control module, and the MCU processors are connected by level shifting circuit with main control module.
3. invasive blood pressure Acquisition Circuit according to claim 1, it is characterised in that the sensor interface isolation circuit bag
Power isolation circuit and signal isolation circuit are included, for isolating identification module.
4. invasive blood pressure Acquisition Circuit according to claim 1, it is characterised in that the power isolation circuit includes DC-
DC isolated power supply modules, the input terminal of the DC-DC isolated power supplies module connect the first filter circuit, the second filter of output terminal connection
Wave circuit, first filter circuit include the first capacitance and the second capacitance in parallel, are gone here and there between first capacitance and the second capacitance
Join the first magnetic bead, second filter circuit includes zener diode in parallel successively, the 3rd capacitance, the 4th capacitance and the 5th electricity
Hold, the second magnetic bead of connecting between the zener diode and the 3rd capacitance.
5. invasive blood pressure Acquisition Circuit according to claim 1, it is characterised in that the signal isolation circuit includes signal
Isolate IC, the signal isolation IC connection anti-static function circuits and signal filter circuit.
6. invasive blood pressure Acquisition Circuit according to claim 1, it is characterised in that the main control module is to MCU processors
Inquiry, MCU processors detect whether invasive pressure sensor connects, and read the identification code of identification module if connection, and return
To main control module, main control module judges whether invasive pressure sensor correctly connects according to back information, if correctly connecting,
Signal processing is carried out to pressure acquisition data, pressure data is calculated and be shown；If correct connection, prompt sensor be not connected with or
Sensor error, and send detection sensor order to MCU processors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474884.4A CN108013870A (en) | 2017-12-29 | 2017-12-29 | A kind of invasive blood pressure Acquisition Circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474884.4A CN108013870A (en) | 2017-12-29 | 2017-12-29 | A kind of invasive blood pressure Acquisition Circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN108013870A true CN108013870A (en) | 2018-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711474884.4A Pending CN108013870A (en) | 2017-12-29 | 2017-12-29 | A kind of invasive blood pressure Acquisition Circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155536A (en) * | 2020-05-08 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Disposable blood pressure collecting device, analysis system and method for collecting blood pressure in real time |
| CN112155532A (en) * | 2019-12-03 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Blood pressure acquisition system, method for acquiring blood pressure in real time and coronary artery analysis system |
| CN112155534A (en) * | 2019-12-03 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Disposable blood pressure collecting device, method for collecting blood pressure in real time and analysis system |
| CN112155533A (en) * | 2019-12-03 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Detachable blood pressure acquisition system, method for acquiring blood pressure in real time and analysis system |
| CN114354021A (en) * | 2021-12-27 | 2022-04-15 | 武汉航空仪表有限责任公司 | Anti-interference pressure transmitting circuit |
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| CN112155534A (en) * | 2019-12-03 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Disposable blood pressure collecting device, method for collecting blood pressure in real time and analysis system |
| CN112155533A (en) * | 2019-12-03 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Detachable blood pressure acquisition system, method for acquiring blood pressure in real time and analysis system |
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| CN112155536A (en) * | 2020-05-08 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Disposable blood pressure collecting device, analysis system and method for collecting blood pressure in real time |
| WO2021223352A1 (en) * | 2020-05-08 | 2021-11-11 | 苏州润迈德医疗科技有限公司 | Disposable blood pressure collection device, analysis system, and real-time blood pressure collection method |
| CN114354021A (en) * | 2021-12-27 | 2022-04-15 | 武汉航空仪表有限责任公司 | Anti-interference pressure transmitting circuit |
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