Automated peritoneal dialysis machine pressure sensor condition checkout gear and methodTechnical field
The present invention relates to automated peritoneal dialysis field, particularly a kind of automated peritoneal dialysis machine is examined with pressure sensor stateSurvey device and method.
Background technology
One of effective ways of nephrotic's renal function replacement therapy during peritoneal dialysis, because the shortage of kidney source causes kidney transplantPatient it is gradually few, and the patient of Blood Dialyzing Center at different levels gradually saturation, peritoneal dialysis is just used by increasing patient.In peritoneal dialysis automated peritoneal dialysis due to be remarkably improved patient quality of life, dialysis-effect is good, be difficult to cause withThe advantages of operating related complication, it is contemplated that explosive growth will be welcome in The Next 3-5 Years.
Dialyzate is injected abdominal cavity by peritoneal dialysis, and dialyzate is swapped with toxins in human body in abdominal cavity, then toxin withDialyzate excludes external.Power source is provided by pump in automated peritoneal dialysis machine, by the conduit of insertion abdominal cavity of patientsTo be input into, draw dialyzate, during input, drawing dialyzate, the flowing of dialyzate is realized by gas, in the processNeed to detect the gas pressure of each part by pressure sensor.The automated peritoneal dialysis device of prior art, lacksFew detection to pressure sensor performance.In equipment running process, the frequency of use of pressure sensor is high, may makeThe hydraulic performance decline of pressure sensor, influences the Stress control of automated peritoneal dialysis machine, so as to influence therapeutic effect.
The content of the invention
It is an object of the invention to provide a kind of automated peritoneal dialysis machine pressure sensor condition checkout gear and method,The performance of pressure sensor can be detected, and is corrected, it is to avoid because of pressure sensor hydraulic performance decline influence peritoneal dialysis machineStress control.
The technical scheme for realizing the object of the invention is：A kind of automated peritoneal dialysis machine is filled with pressure sensor state-detectionPut, including gas circuit chamber, control unit, pressure sensor, source of the gas, the first valve, the second valve and the 3rd valve；
The gas circuit chamber is arranged in peritoneal dialysis machine, for storing gas；
The pressure sensor is connected with gas circuit chamber, the atmospheric pressure value for detecting gas circuit chamber；
The source of the gas is connected by the first valve and the second valve with air pressure chamber, for being input into gas to air pressure chamber；
3rd valve is used to control gas circuit chamber to be connected with ambient atmosphere；
Described control unit is used to control the opening and closing of source of the gas, by controlling the first valve, the second valve, the 3rd valveDoor open and closes control gas turnover gas circuit chamber.
A kind of state-detection and calibration side based on the automated peritoneal dialysis machine with pressure sensor condition checkout gearMethod, comprises the following steps：
Control unit controls the 3rd valve open-minded, by gas circuit chamber and atmosphere；
Gas in emptying gas circuit chamber, until gas circuit chamber is identical with the atmospheric pressure value in air；
Control unit control pressure sensor reads the pressure value in gas circuit chamber, and is compared with Reference pressure value,Judge the state of pressure sensor；
It is base with the minimum pressure sensor of Reference pressure value absolute difference if pressure sensor is normal conditionStandard, calibrates to pressure sensor.
Compared with prior art, remarkable advantage of the invention is：
The present invention can detect the state of the pressure sensor of detection gas pressure in automatic dialysis machine, and carry out schoolJust, it is to avoid the pressure controling precision of automated peritoneal dialysis machine is influenceed because of pressure sensor hydraulic performance decline, so as to influence therapeutic effect.
Brief description of the drawings
Fig. 1 is automated peritoneal dialysis machine pressure sensor condition checkout gear schematic diagram of the present invention.
Fig. 2 is detection and the embodiment schematic diagram of calibration method of pressure sensor state of the present invention.
Fig. 3 is pressure sensor condition adjudgement process schematic in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the present invention.
With reference to Fig. 1, a kind of automated peritoneal dialysis machine pressure sensor condition checkout gear of the invention, including gas circuit chamberRoom, control unit, pressure sensor, source of the gas, the first valve, the second valve and the 3rd valve；
The gas circuit chamber is arranged in peritoneal dialysis machine, for storing gas；
The pressure sensor is connected with gas circuit chamber, the atmospheric pressure value for detecting gas circuit chamber；
The source of the gas is connected by the first valve and the second valve with air pressure chamber, for being input into gas to air pressure chamber；
3rd valve is used to control gas circuit chamber to be connected with ambient atmosphere；
Described control unit is used to control the opening and closing of source of the gas, by controlling the first valve, the second valve, the 3rd valveDoor open and closes control gas turnover gas circuit chamber.
The present invention also provides a kind of state based on the automated peritoneal dialysis machine pressure sensor condition checkout gearDetection and calibration method, comprise the following steps：
Control unit controls the 3rd valve open-minded, by gas circuit chamber and atmosphere；
Gas in emptying gas circuit chamber, until gas circuit chamber is identical with the atmospheric pressure value in air；
Control unit control pressure sensor reads the pressure value in gas circuit chamber, and is compared with Reference pressure value,Judge the state of pressure sensor；
It is base with the minimum pressure sensor of Reference pressure value absolute difference if pressure sensor is normal conditionStandard, calibrates to pressure sensor.
Further, the method for judging pressure sensor state is：
Judged with the absolute value of Reference pressure value difference value according to pressure sensor, if absolute difference is less than threshold valueRepresent that pressure sensor state is normal, otherwise pressure sensor abnormal state.
Further, the threshold value is 3mbar.
With reference to specific embodiment, the invention will be further described.
Embodiment
As shown in Fig. 2 Fig. 2 is the schematic diagram of pressure sensor state-detection of the present invention and calibration method.In the present embodiment,Pressure sensor state-detection and calibration method are specifically included：
S1, control unit controls the 3rd valve open-minded, and gas circuit chamber is connected with air；
S2, gas in emptying gas circuit chamber, after waiting certain hour, gas circuit chamber is identical with the atmospheric pressure value in air；
S3, control unit control pressure sensor reads the pressure value in gas circuit chamber, and is compared with Reference pressure valueCompared with determining the state of pressure sensor；
It is base with the minimum pressure sensor of Reference pressure value absolute difference if pressure sensor is normal conditionStandard, calibrates to pressure sensor；
Referring to Fig. 3, the state of sensor is determined according to the reading value of pressure sensor 2 and Reference pressure value difference value；Reference gasPressure value takes the atmospheric pressure of peritoneal dialysis machine local environment in theory, it is actually used in due to objective factor, atmospheric value is all provided withIt is 0mbar, absolute difference represents that pressure sensor state is normal within 3mbar, then represents that pressure is passed more than or equal to 3mbarSensor abnormal state.
S4, repeats S1, S2, S3, detects all pressure sensor states of peritoneal dialysis machine；
S5, when all pressure sensor states are normal, carries out peritoneal dialysis machine pressure sensor calibration.Pressure sensingThere is individual difference in device, to realize that peritoneal dialysis machine normally runs, improve due to structure, precision aspect reason, pressure sensorControl accuracy, pressure sensor is calibrated, it is possible to reduce deviation, improves peritoneal dialysis machine running precision box therapeutic effect.
In sum, the embodiment of the present invention provide it is a kind of existing peritoneal dialysis is carried out with pressure sensor state detection andThe method of calibration, can detect pressure sensor state in peritoneal dialysis device, it is to avoid because of the influence of pressure sensor hydraulic performance declineThe precision of fluid control, improves therapeutic effect.