Dräger D-Vapor, Instructions For Use Manual

Page: 111 / 120

Instructions for use D-Vapor/D-Vapor 3000
111
Description
Influence of gas type and composition
The concentration delivered by the vaporizer is
dependent on the composition of the fresh gas
since the viscosity and density of the gas changes
from one gas to another.
The vaporizer is calibrated with Air because the
output concentration deviates little from the set
value for the most frequently used anesthetic gas
mixtures.
When operating with 100 % O
2
the output
concentration with respect to Air rises by a
maximum of 15 % relative.
When operating with 30 % O
2
and 70 % N
2
O the
output concentration with respect to Air falls by a
maximum of 10 % relative.
Influence of atmospheric pressure and altitude
The D-Vapor is calibrated in Vol%. The calibration
in Vol% is independent of the ambient pressure.
The partial pressure of the delivered desflurane
vapor determines the physiological effect. The
partial pressure is dependent on the ambient
pressure. The required setting is calculated
according to the formula:
The following table shows how the control dial on
the vaporizer must be set at an altitude of 1000 m
(3281 ft) and 2000 m (6562 ft) above sea level.
Required
=
Desired partial
pressure at
x
1013 hPa
(14.69 psi)
Setting 1013 hPa
(14.69 psi)
Atmospheric
pressure hPa
Normal set-
ting of the
control dial
Vol% Required setting of the control dial
Vol%
Altitude 1000 m
(3281 ft)
Altitude 2000 m
(6562 ft)
5 5.5 6.5
10 11 12.5
14 16 18