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Chapter 5: Ventilation modes
PEEP
PCV
APCV
PSV
PSV-S
VCV
AVCV
P-SIMV
V-SIMV
The PEEP (= Positive End Expiratory Pressure) is the positive pressure which is
available to the patient during expiration before starting the new inspiration. It can
be spontaneous as well as mechanically controlled.
FREQUENCY
PCV
APCV
PSV
VCV
AVCV
P-SIMV
V-SIMV
The frequency is set in the controlled ventilation modes (PCV / VCV) as a defined
specification by the machine. In the PSV mode and in the assisted APCV or AVCV
mode, the set frequency is defined as the minimum frequency, which can be incre
-
ased by spontaneous breaths of the patient.
In the SIMV modes, the frequency is defined as the frequency used to supply
the mandatory breaths to the patient at the specified IPAP and during the speci
-
fied inspiration time. Thus, the set frequency ensures the patient’s minimum fre
-
quency. In between the mandatory breaths, the patient can increase the frequency
by means of spontaneous inspiration.
APNOEA TIME
PSV
The apnoea time is intended to provide an additional time interval for patient, who
can spontaneously breaths after the mandatory period has expired. The apnea
time begins at the end of the inspiration period. The device begins ventilation if
there are no patient breaths for the duration of the apnoea time. If the set apnoea
time ends before the frequency-depend expiration period expires, the set apnoea
time will not be considered (see Figure 36 on page 81).
TIME INSPIRATION / I:E
PCV
APCV
PSV
VCV
AVCV
P-SIMV
V-SIMV
You can choose in the system screen if you setting up the inspiration time or the
I:E ratio.
The inspiration time defines the duration of inspiration (in seconds). The frequency
must be taken into account when setting the inspiration time. Setting up a fixed
inspiration time, the I:E ratio is calculated depending on the respiratory frequency.
The I:E ratio is the ratio of inspiration to expiration of a breath. Setting up a fixed
I:E ratio, the inspiration time depends on the set frequency.
Summary of Contents for CARAT II pro
Page 2: ......
Page 22: ...22 Chapter 1 Introduction ...
Page 40: ...40 Chapter 3 Description of device ...
Page 106: ...106 Chapter 5 Ventilation modes ...
Page 148: ...148 Chapter 6 Device operation ...
Page 168: ...168 Chapter 8 Cleaning and disinfection ...
Page 175: ...Chapter 10 Appendix 175 Chapter 10 APPENDIX ...