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Diagnostic peritoneal lavage: integration with clinical information to improve diagnostic performance.
Journal of Trauma 1992 January
Management of abdominal trauma requires both the detection of injuries sustained and an ability to distinguish patients who require operative repair from those who do not. In this prospective study of 200 patients receiving diagnostic peritoneal lavage (DPL) following blunt trauma, relationships among DPL result, clinical features (information from initial patient assessment), and laparotomy outcome were investigated. The DPL result alone predicted requirement for laparotomy with an accuracy of 93%, a specificity of 96%, a sensitivity of 85%, a positive predictive value (PV-Positive) of 87%, and a negative predictive value (PV-Negative) of 95%. Combining clinical features with the DPL result reduced the number of unnecessary laparotomies (increased PV-Positive and specificity), but increased the number of missed necessary laparotomies (decreased PV-Negative and sensitivity). The best diagnostic performance was found by combining the DPL result with circulatory status, which, in this series of patients, predicted necessary laparotomy with an accuracy of 95%, a specificity of 99%, a sensitivity of 81%, a PV-Positive of 98%, and a PV-Negative of 94%.
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