A clinical observation algorithm for anterior abdominal stab wound is safe in an Australian setting.

Introduction: We previously published the outcomes associated with the use of diagnostic laparoscopy to determine peritoneal breach for AASW patients without an immediate indication for laparotomy. Although this pathway was 100% sensitive there was a 54% non-therapeutic laparotomy rate. Another option that has been extensively reported is the clinical observation algorithm (COA) however, majority of the data originate from high-volume centres. We hypothesized that a COA would also be a safe option in an Australian setting, and reduce the rate of non-therapeutic operative intervention in managing AASW.

Methods: This was a prospective cohort study examining patients with AASW admitted to a level 1 trauma centre in Sydney, Australia, between June 2021 and August 2023. Patient, injury, management and outcome data were collected from electronic medical records and the hospital trauma registry. Data were then analysed to determine the diagnostic accuracy of the COA, complication rates and median hospital length-of-stay (LOS).

Results: A total of 48 patients presented with AASW. Of these patients, 11 (22.9%) proceeded to immediate laparotomy. Seven patients had a contraindication to COA and underwent diagnostic laparoscopy. Thirty patients were managed with the COA, with three (10%) patients subsequently requiring a laparotomy. Only one patient (3.3%) underwent a non-therapeutic laparotomy. There were no missed injuries. The COA sensitivity was 100%, specificity 92.7%, PPV 50% and NPV 100%. Patients managed with COA had no complications. Overall median hospital LOS was 1 day (1.0-2.3).

Conclusion: A COA is a safe approach for evaluating patients with AASW in an Australian setting with adequate resources. It reduces the rate of non-therapeutic operative intervention and has acceptable outcomes compared with a diagnostic laparoscopy pathway.