Mindray BeneVision N22 User Manual

33 - 8 BeneVision N22/N19 Patient Monitor Operator’s Manual
On the Ventilation page, you can also perform the following operations:
■ Select Pressure Unit. Then corresponding parameter values will be automatically converted and updated
accordingly.
■ Select Range to show the normal range of each parameter.
33.6.2 Input Parameters for Ventilation Calculations
33.6.3 Calculated Parameters and Formulas for Ventilation Calculations
Input Parameter Label Unit
percentage fraction of inspired oxygen FiO
2
%
respiration rate RR rpm
partial pressure of mixed expiratory CO2 PeCO
2
mmHg, kPa
partial pressure of carbon dioxide in the arteries PaCO
2
mmHg, kPa
partial pressure of oxygen in the arteries PaO
2
mmHg, kPa
tidal volume TV ml
respiratory quotient RQ None
atmospheric pressure ATMP mmHg, kPa
Calculated Parameters Label Unit Formula
partial pressure of oxygen
in the alveoli
PAO
2
mmHg, kPa PAO
2
(mmHg) = [ATMP (mmHg) - 47 mmHg]
× FiO
2
(%)/100 - PaCO
2
(mmHg) × [FiO
2
(%)/
100 + (1 - FiO
2
(%)/100)/RQ]
alveolar-arterial oxygen
difference
AaDO
2
mmHg, kPa AaDO
2
(mmHg) = PAO
2
(mmHg) - PaO
2
(mmHg)
oxygenation ratio Pa/FiO
2
mmHg, kPa
Pa/FiO
2
(mmHg) = 100 × PaO
2
(mmHg)/FiO
2
(%)
arterial to alveolar oxygen
ratio
a/AO
2
%
a/AO
2
(%) = 100 × PaO
2
(mmHg)/PAO
2
(mmHg)
minute volume MV L/min
MV (L/min) = [TV (ml)
× RR (rpm)]/1000
volume of physiological
dead space
Vd
ml
Vd (ml) = TV (ml) × [1 - PeCO
2
(mmHg)/PaCO
2
(mmHg)]
physiologic dead space in
percent of tidal volume
Vd/Vt %
Vd/Vt (%) = 100
× Vd (ml)/TV (ml)
alveolar volume VA L/min
VA (L/min) =[TV (ml) - Vd (ml)]
× RR (rpm)/
1000

Mindray BeneVision N22 Specifications

General

Brand	Mindray
Model	BeneVision N22
Category	Monitor
Language	English