Assist Ratio; Assist Ratio Control Keys - Arrow AutoCAT 2 Series Operating Manual

3 . P r i n c i p l e s o f O p e r a t i o n
3 . 3 : C o n t r o l K e y s a n d F u n c t i o n K e y s

Assist Ratio

AutoPilot ™ and Operator Modes:
The ASSIST RATIO control keys are used to select the frequency of IABP assist the
patient will receive. Counterpulsation is usually initiated in a 1:1 ratio in AutoPilot
Using the left or right arrow keys you can choose your selection. The ASSIST RATIO can
be selected in either direction. The LED for the selected ASSIST RATIO will be
illuminated. The Assist Ratio keys perform the same function in both AutoPilot
Operator mode.
Selection
1:1
1:2
1:4
1:8

Assist Ratio

3-36

Assist Ratio Control Keys

Description
Initiates one inflation-deflation cycle for each cardiac cycle; generally
used after timing has been optimized. Provides maximum IABP
support.
Initiates one inflation-deflation cycle for every second cardiac cycle;
generally used to initiate counterpulsation and optimize timing, and to
wean patient from IABP support.
Initiates one inflation-deflation cycle for every fourth cardiac cycle;
generally used to wean patient from IABP support.
Initiates one inflation-deflation cycle for every eighth cardiac cycle;
generally used to wean patient from IABP support.
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