Comparing the effects of adaptive support ventilation and synchronized intermittent mandatory ventilation on intubation duration and hospital stay after coronary artery bypass graft surgery.
BACKGROUND
Different modes of mechanical ventilation are used for respiratory support after coronary artery bypass graft (CABG). This study aimed to compare the effect(s) of using adaptive support ventilation (ASV) and synchronized intermittent mandatory ventilation (SIMV) on the length of mechanical ventilation (intubation duration) and hospital stay after coronary artery bypass graft surgery.


METHODS
In a randomized control trial, 64 patients were ventilated with ASV as the experiment group or with SIMV as the control group after CABG surgery in Chamran Hospital of Isfahan University of Medical Sciences. The time of tracheal intubation and the length of hospital stay were compared between the two groups. Data were analyzed and described using statistical analysis (independent t-test).


RESULTS
The mean time of intubation duration was significantly lower in ASV group compared with SIMV group. (4.83 h vs 6.71 h, P < 0.001). The lengths of hospital stay in the ASV and the SIMV groups were 140.6 h and 145.1 h, respectively. This difference was significant between the two groups (P = 0.006).


CONCLUSIONS
According to the results of this study, using ASV mode for mechanical ventilation after CABG led to a decrease in intubation duration and also hospital stay in comparison with the SIMV group. It is recommended to use ASV mode on ventilators for respiratory support of patients undergoing coronary artery bypass graft surgery.
Ulcer Repair Research Center, Faculty of Nursing and Midwifery, Isfahan University of Medical Sciences, Isfahan, Iran.
Ahmadreza
A
Yazdannik
Department of Critical Care Nursing, School of Nursing and Midwifery, Nursing Student Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
Hadi
H
Zarei
Department of Anesthesiology, School of a Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Gholamreza
G
Massoumi
Adaptive support ventilation; Iran; cardiac surgery intensive care unit; coronary artery bypass; coronary artery bypass graft surgery; intensive care unit; mechanical ventilation; nurses; nursing; synchronized intermittent mandatory ventilation