CARDAIC SURGERY;

RISK FACTORS OF DELAYED EXTUBATION

Abstract

Objectives: To identify the risk factors of delayed extubation after cardiac surgery.
Study Design: Observational study. Setting: Cardiac surgery in CPE Institute of Cardiology.
Period: 2 months from November-2016 to March-2017. Methods: Eighty-one (81) patients who
underwent cardiac surgery. In ICU we recorded extubation time of all patients. Patients with
extubation time <6 hours after labelled as early extubation group and those with extubation
time >6 hours were labelled as delayed extubation group. We recorded their preoperative risk
factors and operative variables of surgery to identify the risk factors that leads to late extubation
after cardiac surgery (CS). Results: Prevalence of diabetes was significantly high in patients
with delayed extubation. There were 42.3% diabetic patients with delayed extubation and only
12.7% diabetic patients with early extubation (p-value 0.003). Total pump time, cross clamp
time and type of operation were similar between the groups. Cardiovascular instability was
the most common cause of delayed extubation that occurred in 9 patients, reduced level of
consciousness in 9 patients, post-op bleeding in 6 patients, while hypoxemia and increased
respiratory rate occurred in 1, 1 patient respectively. Conclusion: Diabetes Mellitus is an
independent risk factor of delayed extubation after cardiac surgery. Cardiovascular instability,
reduced level of consciousness and post-operative bleeding after surgery are the main factors
that leads to delayed extubation after CS.