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11.4 Performance Specifications
Fetal monitoring (FHR, TOCO, FM)
Ultrasound
Technique: ultrasonic pulse Doppler
Ultrasonic operating frequency: 0.8MHz~5.0MHz
US frequency: 2MHz
Spatial-average pulse-average intensity (I
SAPA
): <20mW/cm
2
Offset with nominal frequency: ≤±10%
Mechanical index MI: < 1
Thermal index for soft tissue TIS: < 1
Thermal index for bone TIB: <1
FHR measuring range: 30 ~240 bpm/min
FHR measurement accuracy: ±2 bpm/min
FHR display scope: 30~240 bpm /min
Uterine contraction
ressure (TOCO)
Coverage scope of uterine contraction pressure: 0~100 units
Nonlinear error for uterine contraction pressure measurement: ±10%
Paper feeding error for curve recording: <±5%
Fetal movement (FM)
Manual
11.5 Recorder Specifications
Printing
specifications
Printing method Thermal sensitive line dot method
Effective printing width
144 mm
Printing speed:
Standard Speed (Real-Time Traces ): 1 cm/min, 2 cm/min, 3 cm/min
Fast Print Speed (Stored Traces): Up to 75mm/sec
Paper width 156mm
Paper feed method 1 dot line / 4 pulse, bipolar 1-2 phase
excitation
Paper feed accuracy
5% at fixed-speed feed with the back
tension of approx.100g(0.98N)
Record Information:
FHR1 trace/mark, FHR2 trace/mark,
FHR3 trace/mark, TOCO trace, fetal
movement mark, date, time, printing
speed, ID, name, FHR2 Offset, FHR3
Offset etc.
Detection
function
Head temperature detection Thermistor
Paper detection Photo interrupter
Mark detection
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