Should surgeon-performed intraoperative ultrasound be the preferred test for detecting main pancreatic duct injuries in operative trauma cases?

BACKGROUND

The diagnostic performance of multiple tests for detecting the presence of a main pancreatic duct injury remains poor. Given the central importance of main duct integrity for both subsequent treatment algorithms and patient outcomes, poor test reliability is problematic. The primary aim was to evaluate the comparative test performance of computed tomography (CT), magnetic resonance cholangiopancreatography (MRCP), endoscopic retrograde cholangiopancreatography (ERCP), and intraoperative ultrasound (IOUS) for detecting main pancreatic duct injuries.

METHODS

All severely injured adult patients with pancreatic trauma (2010-2021) were evaluated. Patients who received an IOUS pancreas-focused evaluation, with Grades III, IV, and V injuries (main duct injury) were compared with those with Grade I and Grade II trauma (no main duct injury). Test performances were analyzed.

RESULTS

Of 248 pancreatic injuries, 74 underwent an IOUS. The additional mix of diagnostic studies (CT, MRCP, ERCP) was variable across grade of injury. Of these 74 IOUS cases for pancreatic injuries, 48 (64.8%) were confirmed as Grades III, IV, or V main duct injuries. The patients were predominantly young (median age = 33, IQR:21-45) blunt injured (70%) males (74%) with severe injury demographics (injury severity score = 28, (IQR:19-36); 30% hemodynamic instability; 91% synchronous intra-abdominal injuries). Thirty-five percent of patients required damage-control surgery. Patient outcomes included a median 13-day hospital length of stay and 1% mortality rate. Test performance was variable across groups (CT = 58% sensitive/77% specific; MRCP = 71% sensitive/100% specific; ERCP = 100% sensitive; IOUS = 98% sensitive/100% specific).

CONCLUSION

Intraoperative ultrasound is a highly sensitive and specific test for detecting main pancreatic duct injuries. This technology is simple to learn, readily available, and should be considered in patients who require concurrent non-damage-control abdominal operations.

LEVEL OF EVIDENCE: Diagnostic Test/Criteria; Level III.