IEC 60601-2-34:2005 requires the following performance tests for the invasive blood pressure (IBP) function of a patient monitor:
- Accuracy of pressure measurement (static, real pressure sources)
- Accuracy of systolic (dynamic, real or simulated pressure sources)
- Frequency response (dynamic, real pressure sources)
- Alarm response time (dynamic, real or simulated pressure sources)
- Although some of the tests refer to real pressure sources, in many cases manufacturers of the monitor and sensor are different. In this case, it can be appropriate to test the patient monitor using simulated signals only, using the industry wide 5µV/V/mmHg specification for IBP sensors. Also for the frequency response test, an alternate method is to test the patient monitor and sensor separately, with the patient monitor tested by simulated signals, and the sensor tested by step response (see here for more details).
Thông số kỹ thuật
- Output voltage range : -1.25mV ~ +8.25mV
- DAC resolution : 2.2µV
- Overall Accuracy : ±5µV
- Output Drift : <2µV / 30 min
- Output Noise : <2µV
- Frequency range : Sine: 0 – 40Hz
- Frequency accuracy : ±0.1%
- Sample rate (waveform streaming) : 5kHz
- Sensor load resistance : 1.33kΩ
- Sensor voltage measurement accuracy : ±0.1%
- Voltage monitor output : Direct connection to the differential output