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8.14 Patient Triggered Modes
8.14.1 To use SLE 2000 in PTV and SIMV mode
As in steps 1 to 5 and CPAP setup
(a) Advance the mode switch to CMV
(b) Set PTV sensitivity to 1
(c) Set the BPM control to provide either:-
The desired back-up rate for PTV
or
The desired number of mandatory breaths per minute for SIMV
(d) Advance the mode switch from CMV to PTV or SIMV
Once connected to a patient, increase the PTV sensitivity towards Max until patient
effort triggers the ventilator. This is indicated by the TRIGGER BACK-UP light
extinguishing.
The weaker the patient the higher the sensitivity required.
After 60 seconds with an update every 60 seconds, the BPM LED display will indicate
the number of patient initiated breaths that were delivered in the preceding minute.
Care should be taken not to set the PTV sensitivity too high as it could self trigger.
Note on the set-up for PTV
If currently ventilating a patient in CMV mode and the decision is made to
change to PTV, the BPM must be reduced to approx. 10 BPM. This is done to
enable the patient to trigger the ventilator. Once this has been achieved the
BPM can be increased to approximately 20 BPM below the patients measured
respiratory rate.
This becomes the backup BPM rate.
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