(A)Cv Mode - Assisted Volume-Controlled Ventilation - ResMed Astral Series Clinical Manual

Ventilation modes

(A)CV mode - Assisted volume-controlled ventilation

(A)CV is a volume target ventilation mode delivering volume-controlled mandatory breaths:
-
Inspiration can either be initiated by the ventilator at a set respiratory rate (time-triggered breath)
or the patient (spontaneous-triggered breath). A spontaneous breath re-schedules the next
time-triggered breath. Both Trigger and Resp. rate can be set to Off, but not at the same time.
When Trigger is set to Off, the mode name will be shown on the Information bar as CV.
-
End of inspiration (switch from inspiration to expiration) is controlled by the ventilator (time-cycled
breath).
Parameter
Resp. rate (per min)
PEEP (cmH
O)
2
Vt (mL)
PIF (L/min)
Ti (sec)
Flow shape (%)
Trigger Type
Trigger
Note: Some default settings are different for Mouthpiece circuit.
*The International ventilator standard indicates that Paediatric patient type is intended to be used for a patient receiving less
than 300 mL, however Astral permits adjustment of 'Vt' setting parameter up to 500 mL for cases where 'Vt' is set such that it
compensates for leak in the breathing circuit.
WARNING
ResMed does not recommend 500 mL as the upper limit for the pediatric tidal volume use;
however, clinicians may choose this upper limit based on their clinical determination.
Supplementary features:
•
Apnoea response
•
Sigh breath (Astral 150 only)
•
Manual breath (Astral 150 only)
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Setting
Adult: Off, 2 to 50 [15]
Paed: Off, 5 to 80 [15]
Off, 3.0 to 20.0 [5.0]
Adult: 100 to 2500 [500]
Paed: 50 to 300 [100]*
When Volume Breath option is set to PIF:
Adult: 10 to 120 [50]
Paed: 5 to 60 [10]
When Volume Breath option is set to Ti:
Adult: 0.3 to 3.0 [1.0]
Paed: 0.3 to 3.0 [0.6]
100 (Constant), 75, 50, 25 [100]
Flow / Pressure
When Trigger Type is set to Flow
(double limb circuit only)
Adult: Off, 0.5 to 15 [1.0] (L/min)
Paed: Off, 0.5 to 15 [0.5] (L/min)
When Trigger Type is set to Pressure
(double and single limb circuit)
Off, Very low to Very high [Medium]