The association between pancreatic enzyme serum concentrations and blunt pancreatic trauma: a systematic review.

Clinical Snapshot

Key Findings

• P Value: Not reported

• Effect Size: Early serum amylase (<90 min post-injury): low sensitivity (magnitude not specified in abstract). Delayed combined amylase and lipase testing (>3 hours post-injury): sensitivity 85%, specificity 100% in one study

• Primary Outcome: Diagnostic accuracy of serum amylase and/or lipase for detecting blunt pancreatic trauma in adults

• Nnt Or Sensitivity: Sensitivity 85%, Specificity 100% (single study, delayed combined testing >3 hours post-injury); early amylase sensitivity described as low — specific values not provided in abstract

• Confidence Interval: Not reported

Clinical Application

Serum amylase and lipase are universally available, inexpensive, and routinely ordered in Australian emergency and trauma settings. The key implementation challenge is the timing of measurement — clinicians must understand that enzyme levels drawn within 90 minutes of injury have limited diagnostic utility and that repeat testing at 3–6 hours post-injury is more informative. This requires a structured serial sampling protocol, which may be feasible in major trauma centres but logistically challenging in regional or rural settings. Blunt pancreatic trauma is managed across Australian Level 1 trauma centres including John Hunter Hospital (Newcastle), Royal Darwin Hospital, and Bankstown Hospital — all represented in the author affiliations. The RACGP and Australasian College for Emergency Medicine (ACEM) do not currently have specific guidelines for pancreatic enzyme use in blunt trauma triage. CT scanning is the primary diagnostic modality in Australian trauma protocols, consistent with the review's suggestion that enzyme testing may complement rather than replace imaging. Serum amylase and lipase are MBS-rebatable (MBS item numbers 66500 and 66536 respectively), making serial testing financially feasible. The TGA has no specific regulatory position on enzyme biomarkers for trauma diagnostics. Given the rarity of blunt pancreatic trauma in Australian trauma registries, multicentre prospective studies — potentially through the Australia New Zealand Trauma Registry (ANZTR) network — would be the most appropriate validation pathway. Adult patients presenting to emergency departments or trauma centres following blunt abdominal trauma where pancreatic injury is clinically suspected or cannot be excluded on initial assessment

Abstract

PURPOSE: Blunt pancreatic trauma is uncommon. When suspected, serum amylase and lipase are measured, but their diagnostic value remains uncertain. This systematic review evaluated the diagnostic performance of serum amylase and serum lipase in detecting blunt pancreatic trauma in adults. METHODS: MEDLINE, Embase, Scopus and Cochrane Central were searched for studies evaluating serum amylase and/or lipase in adults with blunt pancreatic trauma. Observational studies reporting diagnostic accuracy or clinical outcomes were included. Two reviewers independently screened studies and assessed risk of bias using the Newcastle-Ottawa Scale. RESULTS: Four observational studies met inclusion criteria. A total of 4937 patients with blunt abdominal trauma, including 150 with pancreatic injury were investigated. Two studies evaluated serum lipase alone and two compared amylase and lipase. Pancreatic injuries were graded according to the American or Japanese Association for the Surgery of Trauma. Early serum amylase measurement (< 90 min post-injury) demonstrated low sensitivity. In contrast, testing performed more than 3 h after injury has shown improved diagnostic accuracy with one study suggesting combined serum amylase and lipase testing can achieve a sensitivity of 85% and specificity of 100%. CONCLUSION: Early serum pancreatic enzymes measurement does not appear to aid initial management decisions following blunt abdominal trauma. Delayed testing (> 3-6 h), particularly using lipase or combined lipase and amylase showed improved diagnostic performance. Prospective multicentre validation is needed to define their role in guiding further imaging after equivocal or negative initial CT.

References

1. 1.Sykes, B., Gracias, D., Bendinelli, C., & Balogh, Z. J. (2026). The association between pancreatic enzyme serum concentrations and blunt pancreatic trauma: a systematic review. European Journal of Trauma and Emergency Surgery. https://doi.org/10.3390/ijerph15020277