624074/07 7-29
RCinsp
(s)
Monitoring 1 Inspiratory time constant. It is calculated from
the product of Rinsp and Cstat and defines the
inflation time. RCinsp is calculated using the
LSF method.
NOTE:
Actively breathing patients can create
artifact or noise, which can affect the
accuracy of these measurements. The
more active the patient, the less accu-
rate the measurements. To minimize
patient activity during these measure-
ments, you can choose increased Psup-
port by 10 cmH2O. After completion,
return this control to its former setting.
An inspiratory time shorter than 2 x RCinsp
indicates disequilibrium between ventilator
pressure and alveolar pressure and can result in
inadequate inspiration.
Rexp
(cmH
2
O/
(l/s))
Monitoring 1
NOTE:
Actively breathing patients can create
artifact or noise, which can affect the
accuracy of these measurements. The
more active the patient, the less accu-
rate the measurements. To minimize
patient activity during these measure-
ments, you can choose increased Psup-
port by 10 cmH
2
O. After completion,
return this control to its former setting.
Resistance to expiratory flow caused by the
endotracheal tube and major airways during
exhalation. It is calculated using the LSF
method applied to the expiratory phase.
Table 7-1. Monitored parameters
Parame-
ter (unit)
Monitoring
Window
Definition
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