Objectives: Poststernotomy mediastinitis after cardiac operations is a nosocomial infection involving the mediastinal space and the sternum, with a high mortality rate mostly related to a late diagnosis. We investigated whether sternal puncture might facilitate and shorten the delay in the diagnosis of mediastinitis.
Methods: Of 1024 patients undergoing sternotomy for cardiac surgery, sternal puncture was performed in a subgroup of 49 patients in whom mediastinitis was suspected.
Results: Sternal puncture culture results were positive for all patients with true mediastinitis (n = 23) and negative in 24 of 26 patients without mediastinitis. In addition, sternal puncture allowed diagnosis of mediastinitis with a shorter delay (9 +/- 5 days vs 13 +/- 8 days, P =.04) and caused a reduction in the length of mechanical ventilation (3 +/- 4 days vs 10 +/- 13 days, P =.02) and stay in the intensive care unit (9 +/- 7 days vs 18 +/- 15 days, P =.02) compared with that found in another group of patients (n = 20) operated on for true mediastinitis on the basis of the presence of classic, delayed, clinical signs.
Conclusions: Our study shows that sternal puncture is a rapid and safe method to ensure the diagnosis of poststernotomy mediastinitis.
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