Wound infection in cardiac surgery.

Area of Science:

• Cardiovascular Surgery
• Infectious Disease Epidemiology

Background:

• Open heart surgery encompasses various procedures including coronary bypass, valve replacement, valve repair, and congenital heart surgery.
• Sternal wound infections (SWI) are a significant complication following open heart surgery.
• Risk factors for SWI require continuous investigation to improve patient outcomes.

Purpose of the Study:

• To analyze the incidence and risk factors of sternal wound infections in patients undergoing different types of open heart surgery.
• To identify specific patient populations and surgical characteristics associated with a higher risk of infection.

Main Methods:

• Retrospective analysis of 170 patients who underwent open heart surgery in 1983.
• Categorization of surgeries into coronary bypass, valve replacement, valve repair, and congenital heart surgery.
• Comparison of infection rates based on surgical type, patient comorbidities (diabetes, obesity), and operative factors.

Main Results:

• Overall sternal wound infection rate was 8.2% (14/170), with 5.8% minor and 2.3% major infections.
• Coronary bypass surgery patients had a 6-fold higher sternal wound infection rate (20%) compared to other open heart surgeries (3.3%).
• Diabetic and obese patients showed a three times higher incidence of wound infection; 54% of coronary bypass patients were diabetic.

Conclusions:

• Coronary artery bypass surgery is associated with a substantially higher risk of sternal wound infection.
• Diabetes and obesity are significant risk factors for wound infections post open heart surgery.
• Longer operation duration and coronary perfusion time may contribute to increased infection risk in coronary artery surgery patients.