CN204445867U - The device of monitoring heart stroke - Google Patents
The device of monitoring heart stroke Download PDFInfo
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- CN204445867U CN204445867U CN201520049935.9U CN201520049935U CN204445867U CN 204445867 U CN204445867 U CN 204445867U CN 201520049935 U CN201520049935 U CN 201520049935U CN 204445867 U CN204445867 U CN 204445867U
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- monitoring
- processor
- heating
- heart stroke
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Abstract
This application discloses a kind of device of monitoring heart stroke, comprise heating module and monitoring modular; Described heating module, heats for utilizing the thermal resistance on float catheter; Described monitoring modular, for carrying out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stops measuring.In the detailed description of the invention of the application, because observation process carries out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stop measuring.The application adopt in heating and control mechanism current limliting, in limited time, the mechanism of dual monitoring, the safety of heating is guaranteed again in conjunction with voltage and the control of heat time heating time, the application ensure that safety with two Synchronous Heating restriction, thus significantly improving the accuracy of heart stroke monitoring and the safety in applying, property performance period is monitored.
Description
Technical field
The application relates to medical apparatus and instruments, particularly relates to a kind of device of monitoring heart stroke.
Background technology
One of physiological activity important parameter of human body is heart stroke, the important parameter of reflection human heart function, heart stroke measuring method has a variety of, what current Application comparison was clinically universal is thermodilution method, namely by using float catheter (being placed on the atrium of heart through venipuncture), and squeezing into a certain amount of frozen water by float catheter, relending and helping heart stroke measuring instrument, realize the discontinuous measurement of heart stroke, this method is the goldstandard method that current heart stroke is measured.Usual thermodilution method adopts float catheter, and be inserted into endocardial (atrium and pulmonary artery) by vein, a certain amount of ice normal saline (or under room temperature normal saline) is injected again by the injection port of float catheter, Real-Time Monitoring is on the impact of blood temperature, and utilize thermal balance to carry out the measurement of heart stroke, (1) formula is computing formula below:
In formula, CO is heart stroke, and K is conversion coefficient, is relevant with the temperature difference of catheter length, TB-TI, and N is the persistent period of blood temperature change, the change that TB is blood heat, TI is injection temperature, Δ Tb is blood temperature.
The mode developing again a kind of heating in recent years realizes the injection of similar frozen water, the heating resistor of float catheter is utilized to realize Fast Heating, and the measurement of heart stroke can be realized equally, because this heating is controlled, therefore can be better, and realize the monitoring of heart stroke continuously, but, just because the measurement of heart stroke needs to the Sensor section Fast Heating be placed in ventricle, increase the temperature rise of local, this temperature rise value can be less than 1 degree Celsius usually, but due to sensor fault may cause this temperature be increased beyond Celsius 2 degree thus produce harm, conventional way carries out real time temperature, the restriction of heating duration, these measures are still not enough to overcome because the temperature rise that fault produces exceedes the harm of 2 degree Celsius.
Summary of the invention
The application provides a kind of device of monitoring heart stroke.
The application provides a kind of device of monitoring heart stroke, comprises heating module and monitoring modular;
Described heating module, heats for utilizing the thermal resistance on float catheter;
Described monitoring modular, for carrying out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stops measuring.
Said apparatus, described monitoring modular is also for monitoring period, and described monitoring period comprises the interval of monitoring heating duration and adjacent twice measurement.
Said apparatus, described monitoring modular comprises:
Communication unit, for when starting thermal resistance and heating, makes dual processor synchronous monitoring and real-time Communication for Power;
First monitoring unit, for monitoring period, if the interval that heating duration exceedes first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process;
Second monitoring unit, for monitoring period and heating voltage, if the interval that heating voltage exception and/or heating duration exceed first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process;
Measuring unit, for carrying out blood temperature measure of the change, calculates heart stroke at the end of the change of blood temperature.
Said apparatus, described dual processor comprises primary processor and from processor, described primary processor arranges high level by an input/output terminal, and be connected to from processor by bleeder circuit, make to obtain high potential from processor, start the timing from processor, be connected to primary processor by on-off circuit simultaneously, make primary processor obtain synchronization monitoring state.
Said apparatus, in measurement or in waiting for, primary processor and report state mutually by PORT COM from processor, and undertaken inquiring about and confirming by input/output terminal, and trigger and measure or halted state, when occurring abnormal, triggering and stopping measuring.
Said apparatus, described primary processor comprises PLC, FPGA or MCU.
Said apparatus, describedly comprises PLC, FPGA or MCU from processor.
Owing to have employed above technical scheme, the beneficial effect that the application is possessed is:
In the detailed description of the invention of the application, because observation process carries out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stop measuring.The application adopt in heating and control mechanism current limliting, in limited time, the mechanism of dual monitoring, the safety of heating is guaranteed again in conjunction with voltage and the control of heat time heating time, the application ensure that safety with two Synchronous Heating restriction, thus significantly improving the accuracy of heart stroke monitoring and the safety in applying, property performance period is monitored.
Accompanying drawing explanation
Fig. 1 is the application's heating and controlling circuit in one embodiment;
Fig. 2 is the real time temperature monitoring circuit in application;
Fig. 3 is the device structural representation in one embodiment of the application.
Detailed description of the invention
By reference to the accompanying drawings the application is described in further detail below by detailed description of the invention.
As shown in Figures 1 to 3, the device of the monitoring heart stroke of the application, its a kind of embodiment, comprises heating module and monitoring modular; Heating module, heats for utilizing the thermal resistance on float catheter; Monitoring modular, for carrying out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stops measuring.When stopping measuring, first need to stop heating, in order to avoid damage human body.
In one embodiment, monitoring modular is also for monitoring period, and monitoring period comprises the interval of monitoring heating duration and adjacent twice measurement.
Monitoring modular comprises communication unit, the first monitoring unit, the second monitoring unit and measuring unit.Communication unit, for when starting thermal resistance and heating, makes dual processor synchronous monitoring and real-time Communication for Power.First monitoring unit, for monitoring period, if the interval that heating duration exceedes first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process.Second monitoring unit, for monitoring period and heating voltage, if the interval that heating voltage exception and/or heating duration exceed first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process.Measuring unit, for carrying out blood temperature measure of the change, calculates heart stroke at the end of the change of blood temperature.
First threshold and Second Threshold can be arranged as required, to ensure premised on safety.First threshold is 20 ~ 40 seconds, and Second Threshold is 100 ~ 140 seconds.In the present embodiment, first threshold is 30 seconds, and Second Threshold is 120 seconds, and Second Threshold is the minimum interval of adjacent double measurement, generally need guarantee to measure each time and terminate, to next time between measurement, have the convalescent period of more than 60 seconds.First threshold and Second Threshold also can arrange and rule of thumb be set to other numerical value, as long as guarantee safety.
In one embodiment, dual processor comprises primary processor and from processor, primary processor arranges high level by an input/output terminal, and be connected to from processor by bleeder circuit, make to obtain high potential from processor, start the timing from processor, be connected to primary processor by on-off circuit simultaneously, make primary processor obtain synchronization monitoring state.Primary processor and all can select PLC, FPGA, MCU or other controllers from processor, in the present embodiment, primary processor and all select MCU from processor.
In one embodiment, in measurement or in waiting for, primary processor and report state mutually by PORT COM from processor, and undertaken inquiring about and confirming by input/output terminal, and trigger and measure or halted state, when occurring abnormal, triggering and stopping measuring.
For guaranteeing the control that is perfectly safe under single failure, the application use dual controller both-way communication mechanism, by I/O state and communication double mechanism realize dual controller work alone mechanism.
As shown in Figure 1, A1 is master controller, A2 is from controller, measurement instruction is sent by A1, I/O0 arranges high level, by R1, high potential is obtained after R2 dividing potential drop and by the AD1 of A2, start the timing of A2, simultaneously by I/O1 and R7, R8 opens Q3, R7, the dividing potential drop of R8 is connected to again the AD1 of A1, synchronization monitoring state is obtained by A1, in like manner A1 is also by I/O5 and R9, R10 opens Q3, R11, the dividing potential drop of R12 is connected to again the AD0 of A2, synchronization monitoring state is obtained by A2, simultaneously again by a serial ports Rx of A1 and A2, Tx connects the state communication association realizing both sides, to realize I/O port herein, the multiple temporal of PORT COM, the monitoring of duty.
Description above starts measuring state, first sent by A1, then worked in coordination with and monitor to obtain mutually the opening of heating paths by A2, Q2, Q3 conducting, afterwards again by the DA0 port output drive signal of A1, by R3, R4, A3, R5, R6 and Q1 form crossing current source drive, electric current by
determine; wherein IDA0 is the electric current of DA0, excessive in order to ensure the possible exception of electric current further, also provides current limiting measures at power positive end; be made up of Q4, Q5, R13 and R14; time normal, Q4 conducting, Q5 ends; when current is excessive; Q5 conducting, and trigger Q4 cut-off, realize the protective measure of overcurrent.
As shown in Figure 2, the constant-current source of B point access 30 μ A, Rt is for thermometric critesistor, and R21 is measuring resistance, for system calibration, R22 is school zero resistance, corrects for system zero reference.Realize Quick Measurement to temperature by the control of IO0_A1, IO1_A1, IO2_A1, IO3_A1 tetra-ports, the zero reference of system calibration and system corrects.
Above content is the further description done the application in conjunction with concrete embodiment, can not assert that the concrete enforcement of the application is confined to these explanations.For the application person of an ordinary skill in the technical field, under the prerequisite not departing from the application's design, some simple deduction or replace can also be made.
Claims (7)
1. monitor a device for heart stroke, it is characterized in that, comprise heating module and monitoring modular;
Described heating module, heats for utilizing the thermal resistance on float catheter;
Described monitoring modular, for carrying out bi-directional synchronization restriction by dual processor to heating process, if there is processor exception to be detected, then stops measuring.
2. the device of monitoring heart stroke as claimed in claim 1, is characterized in that, described monitoring modular is also for monitoring period, and described monitoring period comprises the interval of monitoring heating duration and adjacent twice measurement.
3. the device of monitoring heart stroke as claimed in claim 2, it is characterized in that, described monitoring modular comprises:
Communication unit, for when starting thermal resistance and heating, makes dual processor synchronous monitoring and real-time Communication for Power;
First monitoring unit, for monitoring period, if the interval that heating duration exceedes first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process;
Second monitoring unit, for monitoring period and heating voltage, if the interval that heating voltage exception and/or heating duration exceed first threshold and/or adjacent twice measurement is less than Second Threshold, then stops described heating process;
Measuring unit, for carrying out blood temperature measure of the change, calculates heart stroke at the end of the change of blood temperature.
4. the device of monitoring heart stroke as claimed in claim 1, it is characterized in that, described dual processor comprises primary processor and from processor, described primary processor arranges high level by an input/output terminal, and be connected to from processor by bleeder circuit, make to obtain high potential from processor, start the timing from processor, be connected to primary processor by on-off circuit simultaneously, make primary processor obtain synchronization monitoring state.
5. the device of monitoring heart stroke as claimed in claim 4, it is characterized in that, in measurement or in waiting for, primary processor and report state mutually by PORT COM from processor, and undertaken inquiring about and confirming by input/output terminal, and trigger measurement or halted state, when occurring abnormal, triggering and stopping measurement.
6. the device of monitoring heart stroke as claimed in claim 4, it is characterized in that, described primary processor comprises PLC, FPGA or MCU.
7. the device of monitoring heart stroke as claimed in claim 6, is characterized in that, describedly comprises PLC, FPGA or MCU from processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049935.9U CN204445867U (en) | 2015-01-23 | 2015-01-23 | The device of monitoring heart stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049935.9U CN204445867U (en) | 2015-01-23 | 2015-01-23 | The device of monitoring heart stroke |
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| Publication Number | Publication Date |
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| CN204445867U true CN204445867U (en) | 2015-07-08 |
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| CN201520049935.9U Withdrawn - After Issue CN204445867U (en) | 2015-01-23 | 2015-01-23 | The device of monitoring heart stroke |
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| CN (1) | CN204445867U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104665804A (en) * | 2015-01-23 | 2015-06-03 | 深圳大学 | Cardiac output monitoring method and cardiac output monitoring device |
-
2015
- 2015-01-23 CN CN201520049935.9U patent/CN204445867U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104665804A (en) * | 2015-01-23 | 2015-06-03 | 深圳大学 | Cardiac output monitoring method and cardiac output monitoring device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150708 Effective date of abandoning: 20180206 |