Altitude; Rain And Snow - ZOLL 731 Series Operator's Manual

Portable critical care ventilator
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O
PERATION

Altitude

The unit is designed to operate from -2,000 to 25,000 feet (-610 to 7620 meters). An absolute
barometric pressure sensor monitors ambient pressure and this information is used to
continuously correct the output of the device to maintain the ventilation parameters. When the
altitude is > 25,000 feet, the unit activates a Low Priority alarm. When this occurs, the operator
should monitor the peak inspiratory pressure (PIP) and adjust the tidal volume to maintain the
PIP and monitor breath sounds and chest excursion to assure adequate ventilation is
maintained. The tidal volume increases as altitude increases, so the operator should look to
prevent over pressurization of the lung when the altitude increases beyond 25,000 feet. If
changes are made above 25,000 feet, the operator should revert to the initial settings once
operation resumes in the compensated range (the LED will turn from yellow to green).
Warning!
The unit is not intended for hyperbaric operation. Use in a hyperbaric chamber can
result in harm to the patient and/or damage to the device.

Rain and Snow

Like any electronic device, the operator should attempt to prevent exposure to rain or snow.
This can be accomplished by using the optional padded case that can be purchased with the
unit. The unit is capable of operating in these conditions if the operator keeps the device in the
padded case and uses the rain flap, which is provided with the padded case. The padded case
and rain flap prevent rain and snow from puddling on any of the device's surfaces. In cases of
driving rain, where water could possibly enter the unit's compressor, a bacterial/viral filter can
be used to protect the compressor inlet.
3-14
www.zoll.com
906-0731-01 Rev. J

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