9-20 624074/07
9 P/V tool maneuver option
Description: Meaningful data from the P/V Tool maneuver
requires there be no gas leak on the patient side (that is, bet-
ween the flow sensor and the patient’s respiratory system) and
that the flow sensor perform well at low flows (that is, < 15 l/
min in both directions).
For the purposes of normal ventilation, the tightness test and
the flow sensor calibration assure these patient circuit parts will
perform adequately. For the purposes of the P/V Tool maneu-
ver, however, the tightness test and the flow sensor calibration
could not be sufficient. This is because the P/V Tool maneuver
involves very low flows. therefore could not tolerate small
leaks, or less-than-optimal performance, which would be per-
fectly adequate during routine ventilation.
Preparation: Connect the ventilator to AC power, and air and
oxygen supplies. Set up the ventilator for normal ventilation,
complete with appropriate breathing circuit, appropriate flow
sensor, appropriate demonstration lung or lung model, and
expiratory membrane and cover. Switch power ON.
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