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Incidence of sternal wound infection after tracheostomy in patients undergoing cardiac surgery: A systematic review and meta-analysis.

PURPOSE: This systematic review and meta-analysis was performed to determine whether timing or type of tracheostomy was associated with superficial or deep sternal wound infections after cardiac surgery.

METHODS: All studies reporting the incidence of sternal wound infection after tracheostomy in patients undergoing cardiac surgery were collected and analyzed. Subgroup analyses determined a priori included timing of tracheostomy and type of procedure (open vs percutaneous). All analyses used the random effects model. A meta-regression analysis was performed on the proportion of sternal wound infection and number of days between tracheostomy and initial cardiac surgery.

RESULTS: A total of 13 studies met inclusion criteria. The incidence of sternal wound infection across all studies reported was 7% (95% confidence interval [CI], 4-10). The percutaneous tracheostomy group had a sternal wound infection proportion of 3% (95% CI, 1-8), and the open tracheostomy group had a sternal wound infection proportion of 9% (95% CI, 5-14). The incidence of sternal wound infection with early (<14 days) (7%; 95% CI, 3-11) versus late (≥14 days) (7%; 95% CI, 4-10) tracheostomy was similar. Meta-regression demonstrated no significant relationship between incidence of sternal wound infection and number of days between tracheostomy and initial cardiac surgery (R2  = 6.13%, P = .72). Reported secondary outcomes included 30-day and 1-year mortality, which were high at 23% (95% CI, 19-28) and 63% (95% CI, 43-80), respectively.

CONCLUSIONS: The incidence of sternal wound infection after tracheostomy in patients undergoing cardiac surgery remains high at 7% (95% CI, 4-10). Open or percutaneous tracheostomy after cardiac surgery is a feasible option because the incidence of sternal wound infection and short-term mortality are comparable. Moreover, the timing of tracheostomy (early or late) had comparable rates of sternal wound infection and short-term mortality.

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