Potential Risk Factors for Surgical Site Infection after Isolated Coronary Artery Bypass Grafting in a Bahrain Cardiac Centre: A Retrospective, Case-Controlled Study.
OBJECTIVE
The purposes of this study were to determine the incidence of surgical site infections (SSI) and associated risk factors in patients undergoing isolated coronary artery bypass grafting (CABG) in our cardiac center during a 2-year period.


METHODS
Retrospective case-control analysis for 80 patients who underwent isolated cardiac surgery CABG. These patients were divided into the SSI study group (n = 40) and the noninfected control group (n = 40). Eight potential perioperative risk variables were compared between the two groups using univariate logistic regression analysis.


RESULTS
Univariate analysis was carried out for eight potential risk factors. The risk factors found to be significant were: Impaired estimated glomerular filtration rate (P = 0.011) and impaired left ventricular ejection fraction (P = 0.015). However, Factors found to have no significant influence on the incidence of SSIs were: Perioperative length of hospital stay (days), urgency of surgery, use of bilateral internal mammary artery (BIMA) grafting, prolonged cardiopulmonary bypass duration, elevated body mass index.


CONCLUSIONS
Patients with comorbidities of impaired renal function and/or impaired left ventricular systolic function are at high risk of developing SSI. There appears to be a relationship between SSIs in CABG patients and impaired renal or LV function (low ejection fraction). CABG with BIMA grafting could be performed safely even in diabetics. Future studies should consider further scrutiny of these and other factors in relation to SSIs in a larger surgical population.
Department of Cardiovascular Surgery, Sheikh Mohammad Al Khalifa Cardiac Centre, Manama, Kingdom of Bahrain.
Ahmed Abdulaziz
AA
Abuzaid
Department of Cardiothoracic Anaesthesia and Intensive Care, Sheikh Mohammad Al Khalifa Cardiac Centre, Manama, Kingdom of Bahrain.
Mahmood
M
Zaki
Department of Cardiovascular Surgery, Sheikh Mohammad Al Khalifa Cardiac Centre, Manama, Kingdom of Bahrain.
Habib
H
Al Tarief
Bahrain; coronary artery bypass grafting; risk factors; surgical site infection