9-6
9.10 P-V Tool
Mechanical ventilation set with the optimal PEEP can improve oxygenation, improve
alveolar mechanics and reduce injury to the lungs. By drawing static pressure-volume loop
(static P-V loop), P-V tool is the method to determine the optimal PEEP based on the
characteristic points on the static P-V loop. The doctor is able to determine the optimal PEEP
for the patient with the help of this function.
NOTE
The P-V tool function is disabled in the following cases: patient type is Ped ; in
CPAP/PSV ; in NIV or apnea ventilation mode ; during O
2
↑(oxygen enrichment) ;
during P0.1 measurement ; during nebulization or suction ; within one minute
after nebulization or suction ; within one minute after last P-V loop measurement.
The P-V tool function is not recommended when there is great leakage or when the
patient has spontaneous breathing. The relevant characteristic points, that the P-V
tool function provides are only for your reference.
If no operation is performed on P-V tool window within three minutes, the
measurement window exits automatically.
1. Select the [Tools] key→[P-V Tools].
2. Select [P-V Tools] to access the P-V tools window.
3. Read notes related to P-V tool on the Info screen.
4. Select [Procedure], and set parameters of Pstart, Flow, Pmax, and Vlimit on the
Procedure screen. The system acquires Tmax parameter value based on the calculation
formula and displays it on the procedure screen.
Flow: gas delivery and expiration flows of the static P-V loop.
Pstart: starting pressure of the static P-V loop.
Pmax: maximum pressure which the static P-V loop can reach.
Vlimit: maximum volume which the static P-V loop can reach.
Tmax: maximum measurement time required for completing static P-V loop
measurement.
5. Select [Start] and the system starts P-V tool measurement. If you select [Stop Insp]
during measurement, the system stops measurement test in the inspiratory limb
immediately and starts measurement in the expiratory limb. If you select [Abort] during
measurement, the system aborts measurement immediately.
To Next Page
Loading...
General