Sensormedics 3100 Oscillator
3100A for < 30kg; 3100B for >30kg
Used if needing high ventilation pressures and oxygen index is >15 - 20 or high PCO2
Set frequency at 10 Hz for infants, decreasing gradually to 5 Hz for teenagers
Set MAP 2 - 4cm above mean on conventional ventilation initially: adjust according to oxygenation and inflation. Usually aim for high inflation (9-10 posterior ribs on CXR). Reduce MAP when FiO2 is < 0.4 - 0.5
Amplitude adjusted until a good 'bounce' is seen on the chest
To improve pO2 Increase FiO2, Increase MAP
To decrease pCO2 Increase amplitude (2 - 4cm increments), reduce Hz (D/W Cons)
Setting up
1. Connect ventilator to air and oxygen supply
2. Connect to power supply
3. Makes sure the rubber stopper is inserted in the end of the circuit.
4. Turn power on
5. Make sure SILENCE 45secs is lit to ensure the alarms don't sound
6. Calibrate circuit
a. Turn bias flow to 20L/min
b. Set MEAN PRESSURE ADJUST and MEAN PRESSURE LIMIT to Max (full clockwise)
c. Push in RESET, and hold. Observe mean pressure readout - should read 39 - 43cmH2O.
d. Release the RESET button
7. Performance check
a. Set frequency to 15Hz, Insp time to 33% and power to 0.0
b. Turn SET MAX PAW thumbwheel to 30, and SET MIN PAW to 10
c. Adjust MEAN PRESSURE ADJUST control to achieve 19 - 21 cmH2O
d. Press START/STOP - oscillation will now start
e. Increase power to 6.0 and centre the piston
f. Check with panel on top of ventilator that DP (Power) and PAW readings are within range.
8. Set desired pressures and alarm limits (+ / - 2 - 5cmH2O)
a. Pinch expired limb tubing to verify high pressure alarm
9. Remove stopper, connect to patient ETT and press RESET to restart oscillation. Adjust POWER to achieve chest wall movement
