CN2860345Y - Gain calibration device and invasive blood pressure measuring device comprising same - Google Patents
Gain calibration device and invasive blood pressure measuring device comprising same Download PDFInfo
- Publication number
- CN2860345Y CN2860345Y CN 200520062552 CN200520062552U CN2860345Y CN 2860345 Y CN2860345 Y CN 2860345Y CN 200520062552 CN200520062552 CN 200520062552 CN 200520062552 U CN200520062552 U CN 200520062552U CN 2860345 Y CN2860345 Y CN 2860345Y
- Authority
- CN
- China
- Prior art keywords
- signal
- blood pressure
- invasive blood
- circuit
- output
- Prior art date
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A gain calibration apparatus and an invasive blood pressure measuring apparatus with the former one. The gain calibration apparatus comprises a selective switch and at least one standard pressure signal generator corresponding to the characteristics of the predetermined type of sensor. Each fan-out of the standard pressure signal generator is connected with the selective ends of the selective switch. One of the selective ends of the switch is electrically connected to the fan-out of the measuring pressure sensor and the controlling end of the switch is connected to a circuit processing the controlling signal and fan-out connection signal from the invasive blood pressure measuring apparatus. The invasive blood pressure apparatus also contains pressure sensor driving circuit, which generate circuit or voltage driving the measuring pressure sensor and a voltage reference delivered to the power supply terminal of branch voltage circuit with its output being output of the standard pressure signal generator. Therefore, the invasive blood pressure measuring apparatus can accomplish gain calibration of the circuit automatically, can be easily operated, and can strengthen the testing function of the system gain stability.
Description
Technical field this utility model relates to the measurement device that medical diagnosis is used, and relates in particular to the gain correction device of blood pressure measuring device.
It is one of important content of monitoring clinically the sick body physiological feature that background technology is measured blood pressure, is to realize accurately measuring blood pressure the recognized standard method and the direct method of measurement of wound is arranged.The device that uses this method to measure or monitor blood pressure generally comprises
1) pick off and duct portion: general with piercing method conduit the insertion in the sick body arteries earlier, by normal saline in the conduit described intra-arterial pressure is passed to the described pressure transducer that links to each other with conduit again, convert this pressure signal to the signal of telecommunication, give follow-up amplifying circuit by connection cord with this electrical signal transfer again;
2) signal amplifies and filter circuit: amplify the signal of telecommunication of described representative pressure by the instrument amplifying circuit (or its equivalent circuit) that difference input, single-ended output are arranged, active or the passive filter circuit of reuse is made low-pass filtering to finish this amplifying signal denoising, obtain corresponding Pressure Fluctuation Signal, and carry toward analog-digital converter and carry out analog digital conversion;
3) driving of pressure transducer and the pick off testing circuit that comes off: be used for finishing that curtage to the current pressure pick off drives and the status monitoring of pressure transducer;
4) comprise the numerical portion of analog digital conversion and microprocessor: carry out the conversion of blood pressure signal digitized, and based on predetermined data analysis algorithm, realize status monitoring and control, waveform correlation feature identification and the blood pressure parameter of each part mentioned above circuit are calculated with the solidification software form, thereby finish monitoring of blood pressure and relevant parameter in real time and (comprise systolic pressure, diastolic pressure and mean pressure, and pulse frequency) calculates, and obtain the real-time waveform demonstration.
Above-mentioned one type of prior art syringe is in the monitoring of blood pressure process, because pressure transducer is a disposable product, the null offset of described pick off exists always and may change, the gain of amplifying circuit also may change in life-time service, therefore generally need regulate gain and revise these variations, to guarantee the accuracy of blood pressure measurement by the school zero-sum.All be to realize the zero-sum adjusting gain of described school at present with manual method, promptly, at first by manual switching, import ' zero pressure ' and certain normal pressure (as 200mmHg) at signal input part to described pick off, the force value of observing current measurement again is if equal input pressure, then cancel the school zero-sum and regulate the gain step, otherwise carry out the school zero-sum and regulate the gain step,, realize the accurate measurement of static pressure to obtain reference at zero point accurately and gain calibration coefficient.
Above-mentioned the deficiencies in the prior art part is, because school zero is to use intermediary any one process to carry out at each pick off and this pick off, zero point also must be with reference to ambient pressure environment, so need manual finishing; And the school gain does not need at each pick off, as long as carry out at similar particular sensitivity pick off and signal amplification circuit, often when the design blood pressure measuring device, defined the categories of sensors of adaptation, so do not need regular carrying out, thereby current artificial school gain brings following defective: the one, and the gain of manual school is not easy to actual clinical and uses, the 2nd, need be when carrying out the school gain by means of external pressure reference source (as mercury gauge or other piezometer), the inaccurate meeting of these external pressure reference sources brings the inaccurate of school gain results, and then produces the blood pressure measurement error.
Utility model content the technical problems to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and a kind of gain correction device is proposed, can be used for the invasive blood pressure measuring device, can abandon the manual adjustment gain, and adopt automatic calibration based on standard signal source.Thereby increase the gain stability of checking system, and eliminate complicated and the influenced and inaccurate defective of blood pressure measurement of blood pressure measurement process operation that artificial gain calibration causes.
For solving the problems of the technologies described above, of the present utility modelly be contemplated that substantially: because the calibration of gain is not associated with the individual character of pick off, and depend on the sensor type that blood pressure measuring device is default, therefore gain calibration and pick off individuality are peeled away, can design one consistent with the preset kind sensor characteristics, and depending on the reference pressure signal source of drives, gain calibration is finished in the signal input of selecting when being used as calibration automatically; Can come regularly to carry out on schedule described calibration by programme-control, to keep the stable of described blood pressure measuring device amplifying circuit gain.
As first technical scheme that realizes this utility model design be, a kind of gain correction device is provided, be electrically connected an invasive blood pressure measuring device, especially comprise a selector switch, and normal pressure signal source at least one and that the predefined type sensor characteristics adapts, respectively the outfan of this normal pressure signal source connects each selecting side of described selector switch respectively; The another selecting side of described selector switch is electrically connected the outfan of measuring with pressure transducer; The control end of described selector switch connects the control signal from described invasive blood pressure measuring device, and the signal output of outfan is toward the signal processing circuit of described invasive blood pressure measuring device.
As second technical scheme that realizes this utility model design be, a kind of invasive blood pressure measuring device with gain correction device is provided, comprise a sensor interface, be used for being electrically connected the measurement pressure transducer of predefined type; Signal processing circuit, with input signal amplify with Filtering Processing after be sent to analog-digital converter and carry out analog digital conversion; Pressure transducer drives and detection circuit, produces to be sent to drive current or the driving voltage of described measurement with pressure transducer, and receives the status monitoring signal from this pressure transducer; Microprocessor receives the data from described analog-digital converter output, and output unit is sent in analysis result output; Especially, also comprise gain correction device, this gain correction device comprises a selector switch, and normal pressure signal source at least one and that the predefined type sensor characteristics adapts, and respectively the outfan of this normal pressure signal source connects each selecting side of described selector switch respectively; The another selecting side of described selector switch is electrically connected the outfan of described measurement with pressure transducer; The control end of described selector switch connects from described microprocessor control signal, and the output of the signal of outfan is toward described signal processing circuit.
In the such scheme, described microprocessor is also exported a control signal and is sent to described signal processing circuit, is used for regulating the gain of this signal processing circuit.
In the such scheme, described normal pressure signal source comprises bleeder circuit, and described pressure transducer drives and detection circuit is also exported a reference voltage signal, is sent to the power end of described bleeder circuit; This bleeder circuit also has an end ground connection, and other has an outfan, and its output is as the output of described normal pressure signal source.
Adopt above-mentioned each technical scheme, all can finish calibration automatically, and realize judgement, increase the checking function of system gain stability circuit gain stability to circuit gain.
Description of drawings Fig. 1 is the invasive blood pressure measuring device theory diagram of this utility model band gain correction device, and shown in wherein in the dot-dash wire frame is gain correction device
Fig. 2 is the invasive blood pressure measuring device circuit diagram of this utility model band gain correction device
Fig. 3 is this utility model invasive blood pressure measuring device software flow pattern
Below the specific embodiment, the most preferred embodiment shown in is further set forth this utility model in conjunction with the accompanying drawings.
Shown in Fig. 1 block diagram, this utility model invasive blood pressure measuring device comprises a sensor interface, is used for being electrically connected the measurement pressure transducer of predefined type; Signal processing circuit, with input signal amplify with Filtering Processing after be sent to analog-digital converter and carry out analog digital conversion; Pressure transducer drives and detection circuit, produces to be sent to drive current or the driving voltage of described measurement with pressure transducer, and receives the status monitoring signal from this pressure transducer, is used for judging the working condition of described pressure transducer; Microprocessor receives the data from described analog-digital converter output, and output unit is sent in analysis result output.
This device also comprises the gain correction device of being illustrated in the dot-dash wire frame.This gain correction device comprises a selector switch, and normal pressure signal source at least one and that the predefined type sensor characteristics adapts, and respectively the outfan of this normal pressure signal source connects each selecting side of described selector switch respectively; Establish this selector switch in the present embodiment and connect two class standard pressure signal sources, represent with standard signal 1 and 2 respectively.The another selecting side of described selector switch is electrically connected the outfan of described measurement with pressure transducer by described sensor interface; The control end of described selector switch connects from described microprocessor control signal, and the output of the signal of outfan is toward described signal processing circuit.
Be activated work as invasive blood pressure measuring device, during described selector switch selection pressure pick off, this utility model invasive blood pressure measuring device will enter the normal arterial pressure measuring process, shown in Fig. 3 embodiment, microprocessor is under the solidification software guiding, to carry out self check to the circuit state of device each several part, if normally then enter manual school zero process (because of non-the invention emphasis, detailed process slightly); Subsequently, microprocessor receives the pressure testing data from described pressure transducer, carries out pressure waveform identification and judges, calculates, and output test result or (during test crash) improper information.When described selector switch is selected described normal pressure signal source, this utility model invasive blood pressure measuring device will enter the gain calibration process, described microprocessor receives the dateout from described analog-digital converter, compare with the standard value of storage inside, obtain a gain calibration factor, this gain calibration factor is stored, and is used for revising measurement result in follow-up measurement blood pressure process.
Two of the embodiment of this utility model invasive blood pressure measuring device sees dotted line shown in Fig. 1, described microprocessor is also exported a control signal and is sent to described signal processing circuit, like this, when described selector switch selects described normal pressure signal source to enter the gain calibration process, the gain that described microprocessor can the described signal processing circuit of regulating and controlling.
Normal pressure signal source described in described each embodiment is achieved in that described gain correction device also comprises driving device (pressure transducer that is described invasive blood pressure measuring device drives and detection circuit), and drive current or the driving voltage of described measurement with pressure transducer is sent in output.Described normal pressure signal source comprises bleeder circuit, and described driving device is also exported a reference voltage signal, is sent to the Shen Yuanduan of described bleeder circuit; This bleeder circuit also has an end ground connection, and other has an outfan, and its output is as the output of described normal pressure signal source.(but be not limited to this physical circuit form, other equal circuit is also in this utility model scope) specifically as shown in Figure 2: resistance R 18, R19 and be that the circuit of core constitutes described pressure transducer and drives and detection circuit with amplification circuit U2; The bleeder circuit that comprises resistance R 18 and R19 is exported described reference voltage SensorRef0, penetrate with amplification circuit U1-1 through one and to be sent to the two-way bleeder circuit that comprises resistance R 3, R4, R5, R6, a pair of differential signal (acting as described normal pressure signal source) that produces the output of the corresponding property sensor of simulation is sent to a pair of selecting side X1 and the Y1 of described selector switch (U3 realizes with the selector switch integrated circuit).There are a variety of models optional in described amplification circuit and the selector switch integrated circuit prior art, do not repeat them here.
J1 shown in Figure 2 represents described sensor interface, when inserting the predefined type pressure transducer, described signal SensorRef0 drives this pressure transducer through integrated circuit U2, the level of status monitoring signal SensorStatus0 changes simultaneously, can be as shown in Figure 1, be sent to described microprocessor through described analog-digital converter, judge the working condition of described pressure transducer by this microprocessor basis and the comparative result of preset value; Analog-digital converter described here has two input ports, and reception is from the signal of signal processing circuit, and another receives described status monitoring signal.Certainly, described status monitoring signal also can use second analog-digital converter separately, all in protection domain of the present utility model.
The another embodiment of this utility model invasive blood pressure measuring device also can comprise an electrical level judging circuit, the input of this electrical level judging circuit receives described signal SensorStatus0, outfan output judging result signal, be sent to display lamp and show (can use for reference because of prior art has multiple mode) so do not give unnecessary details or illustrate at this.Described electrical level judging circuit can also be the internal circuit of described microprocessor.
Simultaneously among Fig. 2, the differential pressure signal of described pressure transducer output be sent to described selector switch through resistance R 1, R2 respectively another to selecting side X0 and Y0.Control signal A and control signal B from microprocessor (indicate) control described selector switch, select an output signal (through outfan X and Y) and are sent to signal processing circuit (instrument amplifier that comprises U1-2, U1-3 and U1-4) and handle.Resistance R 15, the R24 of described signal processing circuit also can adopt the adjustable resistance that is controlled by microprocessor, are used for the gain of regulating circuit.
As described in Fig. 1 dotted line, the embodiment of this utility model invasive blood pressure measuring device also comprises, the control signal of described pressure transducer driving and detection circuit is sent in one of described microprocessor output, is used for regulating the driving voltage or the drive current that offer described pressure transducer.Like this, when described sensor interface inserted dissimilar pressure transducer, described microprocessor can be according to setting in advance, and the control drive circuit is regulated drive current or the voltage of giving described pressure transducer automatically.For ease of gain calibration, described microprocessor can also drive and detection circuit by described pressure transducer, regulates the reference voltage that is sent to described normal pressure signal source, and then adjusts the normal pressure signal source that produces corresponding the type pressure transducer.
Described a plurality of normal pressure signal source can also set in advance with a plurality of bleeder circuits respectively, connect the different choice end of described selector switch respectively, select to export and be scheduled to the be electrically connected corresponding normal pressure signal source of pressure sensor types by the control signal that is sent to this selector switch.
The adaptable sensor type of the described sensor interface of this utility model invasive blood pressure measuring device will depend on the setting of normal pressure signal source, pick off such as 5uV/V/mmHg and 20uV/V/mmHg etc. at common type in the reality, we can be provided with corresponding two the normal pressure signal sources of the sensor and get final product, but are not limited to two.
Claims (10)
1. a gain correction device is electrically connected an invasive blood pressure measuring device, it is characterized in that:
Comprise a selector switch, and normal pressure signal source at least one and that the predefined type sensor characteristics adapts, respectively the outfan of this normal pressure signal source connects each selecting side of described selector switch respectively; The another selecting side of described selector switch is electrically connected the outfan of measuring with pressure transducer; The control end of described selector switch connects the control signal from described invasive blood pressure measuring device, the output of the signal of outfan is toward the signal processing circuit of described invasive blood pressure measuring device, realizes having the monitoring of the invasive blood pressure of automatic gain calibration by the microprocessor that is connected and solidified program.
2. gain correction device according to claim 1 is characterized in that:
Also comprise driving device, drive current or the driving voltage of described measurement with pressure transducer is sent in output.
3. gain correction device according to claim 1 and 2 is characterized in that:
Described normal pressure signal source comprises bleeder circuit, and described driving device is also exported a reference voltage signal, is sent to the power end of described bleeder circuit; This bleeder circuit also has an end ground connection, and other has an outfan, and its output is as the output of described normal pressure signal source.
4. the invasive blood pressure measuring device with gain correction device comprises
One sensor interface is used for being electrically connected the measurement pressure transducer of predefined type;
Signal processing circuit, with input signal amplify with Filtering Processing after be sent to analog-digital converter and carry out analog digital conversion;
Pressure transducer drives and detection circuit, produces to be sent to drive current or the driving voltage of described measurement with pressure transducer, and receives the status monitoring signal from this pressure transducer;
Microprocessor receives the data from described analog-digital converter output, and output unit is sent in analysis result output;
It is characterized in that:
Also comprise gain correction device, this gain correction device comprises a selector switch, and normal pressure signal source at least one and that the predefined type sensor characteristics adapts, and respectively the outfan of this normal pressure signal source connects each selecting side of described selector switch respectively; The another selecting side of described selector switch is electrically connected the outfan of described measurement with pressure transducer; The control end of described selector switch connects from described microprocessor control signal, and the output of the signal of outfan is toward described signal processing circuit.
5. according to the invasive blood pressure measuring device of the described band gain correction device of claim 4, it is characterized in that:
Described microprocessor is also exported a control signal and is sent to described signal processing circuit, is used for regulating the gain of this signal processing circuit.
6. according to the invasive blood pressure measuring device of the described band gain correction device of claim 4, it is characterized in that:
Also comprise an electrical level judging circuit, the input of this electrical level judging circuit receives described status monitoring signal, outfan output judging result signal.
7. according to the invasive blood pressure measuring device of the described band gain correction device of claim 4, it is characterized in that:
Also comprise second analog-digital converter that receives described status monitoring signal, described microprocessor receives the dateout of this analog-digital converter, and these data and preset value is relatively judged the working condition of described pressure transducer.
8. according to the invasive blood pressure measuring device of the described band gain correction device of claim 4, it is characterized in that:
Described normal pressure signal source comprises bleeder circuit, and described pressure transducer drives and detection circuit is also exported a reference voltage signal, is sent to the power end of described bleeder circuit; This bleeder circuit also has an end ground connection, and other has an outfan, and its output is as the output of described normal pressure signal source.
9. according to the invasive blood pressure measuring device of claim 4 or 8 described band gain correction devices, it is characterized in that:
Described microprocessor is also exported a control signal, is sent to described pressure transducer and drives and detection circuit, is used for regulating described driving voltage or the drive current that offers pressure transducer.
10. according to the invasive blood pressure measuring device of the described band gain correction device of claim 4, it is characterized in that:
The predetermined pressure transducer that is electrically connected of described sensor interface has 2 classes at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062552 CN2860345Y (en) | 2005-08-02 | 2005-08-02 | Gain calibration device and invasive blood pressure measuring device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062552 CN2860345Y (en) | 2005-08-02 | 2005-08-02 | Gain calibration device and invasive blood pressure measuring device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2860345Y true CN2860345Y (en) | 2007-01-24 |
Family
ID=37657973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520062552 Expired - Lifetime CN2860345Y (en) | 2005-08-02 | 2005-08-02 | Gain calibration device and invasive blood pressure measuring device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2860345Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815885A (en) * | 2012-11-19 | 2014-05-28 | 深圳迈瑞生物医疗电子股份有限公司 | Invasive blood pressure testing device |
| CN105249946A (en) * | 2015-10-26 | 2016-01-20 | 武汉思创电子有限公司 | Invasive blood pressure acquisition circuit for inhibiting temperature drift |
| CN106324479A (en) * | 2016-08-11 | 2017-01-11 | 上海东软载波微电子有限公司 | Chip calibration method and circuit, and chip |
| CN113096758A (en) * | 2020-01-09 | 2021-07-09 | 深圳理邦智慧健康发展有限公司 | Blood pressure management method and system |
| CN113907730A (en) * | 2021-10-19 | 2022-01-11 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
-
2005
- 2005-08-02 CN CN 200520062552 patent/CN2860345Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815885A (en) * | 2012-11-19 | 2014-05-28 | 深圳迈瑞生物医疗电子股份有限公司 | Invasive blood pressure testing device |
| CN103815885B (en) * | 2012-11-19 | 2016-02-24 | 深圳迈瑞生物医疗电子股份有限公司 | Invasive blood pressure test set |
| CN105249946A (en) * | 2015-10-26 | 2016-01-20 | 武汉思创电子有限公司 | Invasive blood pressure acquisition circuit for inhibiting temperature drift |
| CN105249946B (en) * | 2015-10-26 | 2018-05-15 | 武汉思创电子有限公司 | A kind of invasive blood pressure Acquisition Circuit for suppressing temperature drift |
| CN106324479A (en) * | 2016-08-11 | 2017-01-11 | 上海东软载波微电子有限公司 | Chip calibration method and circuit, and chip |
| CN113096758A (en) * | 2020-01-09 | 2021-07-09 | 深圳理邦智慧健康发展有限公司 | Blood pressure management method and system |
| CN113907730A (en) * | 2021-10-19 | 2022-01-11 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
| CN113907730B (en) * | 2021-10-19 | 2024-05-17 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105658136A (en) | Patient monitor sensor type auto configuration | |
| KR101998915B1 (en) | Transducer interface system and method | |
| US7775985B2 (en) | Method for analysing pressure signals derivable from a body cavity | |
| DE112009003807B4 (en) | Electronic blood pressure monitor and blood pressure measurement method | |
| CN101589948B (en) | Blood pressure measurement calibration method by oscillography and electronic sphygmomanometer | |
| CN2860345Y (en) | Gain calibration device and invasive blood pressure measuring device comprising same | |
| US20070106165A1 (en) | Sensor wire assembly | |
| Balestrieri et al. | Instruments and methods for calibration of oscillometric blood pressure measurement devices | |
| EP3021740B1 (en) | Blood pressure analysis system and method | |
| CN100566653C (en) | Blood pressure dynamic measuring and trend analysis observation system | |
| CN101589947B (en) | Automatic error detection method in pressure measurement and electronic sphygmomanometer | |
| DE10138799B4 (en) | Device for signal conditioning for medical sensors | |
| US11166676B2 (en) | Real-time kidney monitoring medical device | |
| CN201234977Y (en) | Electronic sphygmomanometer | |
| DE112018001387T5 (en) | Apparatus, method and program for measuring biological information | |
| CN1985755A (en) | Non-invasive blood pressure measuring analyzer | |
| EP2890288B1 (en) | Apparatus for simulation of pressure transducer for measurement of blood pressure | |
| JP6285966B2 (en) | Method of operating an interface connecting a cable and a receiver to a physiological monitor | |
| AU2006211808A1 (en) | Method and apparatus for monitoring a sedated patient | |
| CN213345622U (en) | Blood pressure acquisition device and blood pressure acquisition processing system | |
| CN210811009U (en) | Dynamic blood pressure simulator for measuring electronic sphygmomanometer | |
| CN109805914B (en) | Dynamic calibrator for non-invasive sphygmomanometer | |
| CN110522431A (en) | A kind of ambulatory blood pressure simulator measuring electronic sphygmomanometer | |
| Amoore | Assessment of oscillometric non-invasive blood pressure monitors using the Dynatech Nevada Cuff Link analyser | |
| CN105852834A (en) | Blood pressure measurement system and operating method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150802 Granted publication date: 20070124 |
|
| EXPY | Termination of patent right or utility model |