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The aim of the study was to check the predictability of ‘suction drain tip’ and ‘drain fluid’ cultures for detecting their association with possible surgical site infection. Material and Methods: This was an observational study conducted in Surgical Unit 1, Civil Hospital Karachi from February 2017 to November 2017. All post-operative patients having closed drains were included in the study excluding the patients who did not require drains in post-operative period. Cultures from drain fluid and drain tip were sent. The sensitivity, specificity, positive and negative predictive values were calculated. Result: The predictability for surgical infections in positive drain tip cultures showed Sensitivity =100% and Specificity = 61%. With Positive Predictive Value = 30.3 % and Negative Predictive Value = 100%. In drain fluid cultures the sensitivity was slightly low (85% ) with Specificity = 76.3%. Positive Predictive Value = 37.8% and Negative Predictive Value = 96.8%. Conclusion: We conclude that positive tip cultures and drain fluid can be important predictors of infection with high sensitivity but low specificity.

Predicting Surgical Site Infection by ‘Suction Drain Tip’ and ‘Drain Fluid’ Cultures: Are they Helpful?