Fluke Biomedical medSim 300B - Manual (Page 119)

Option 1
Fetal/Maternal ECG with Intrauterine Pressure
4
4-21
The top line of the display gives the following information:
bpl:lv BP channel 1 left ventricular pressure—120/0
bp3:paw BP channel 3 pulmonary artery wedge pressure
10/2
Pulmonary artery wedge (PAW) pressure setting (variable)
The medSim 300B is now simulating measurements from a catheter wedged in
the pulmonary capillary bed and sensing pressure from the left side of the heart
via the lungs.
The variable systolic blood pressure selections for PAW pressure are:
• 10/2 (normal—medSim 300B default value)
• 26/18
• 29/19
• 31/21
• 34/22
• 36/24
2. Press <F4>-UP or <F3>-DOWN on the medSim 300B to increase or decrease the
systolic blood pressure value for the pulmonary artery wedge (PAW) on blood
pressure channel 3 (bp3:paw).
3. To exit the medSim 300B mitral valve simulation, press the <up arrow> key until
you view the desired menu.
Fetal/Maternal ECG with Intrauterine Pressure
The medSim 300B can simulate a fetal and maternal electrocardiogram (ECG) that
occurs during labor, along with a pressure waveform that is produced by uterine
contractions. This ECG is comprised of the fetal heart rate (FHR) and the maternal heart
rate.
The fetal heart rate can be either fixed or interactive with uterine contractions (periodic).
The maternal ECG is always a normal sinus rhythm with a heart rate of 80 BPM.
The medSim 300B produces waveforms that represent direct measurements of the fetal
heart rate and the intrauterine pressure.
The medSim 300B simulated fetal heart rate represents a measurement from a fetal scalp
electrode while the simulated maternal heart rate represents a measurement from an
electrode on the mother's thigh. The simulated intrauterine pressure waveform represents
a measurement taken by an intra-amniotic catheter connected to a pressure transducer.