Incidence, implications and predictors of abdominal compartment syndrome in acute pancreatitis: A nationwide analysis.

Background: Acute pancreatitis (AP) often presents with varying severity, with a small fraction evolving into severe AP, and is associated with high mortality. Complications such as intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS) are intricately associated with AP.

Objective: To assess the clinical implications and predictors of ACS in AP patients.

Methods: We conducted a retrospective study using the National Inpatient Sample (NIS) database on adult AP patients, further stratified by the presence of concurrent ACS. The data extraction included demographics, underlying comorbidities, and clinical outcomes. Multivariate linear and logistic regression analyses were performed using STATA (v.14.2).

Results: Of the 1,099,175 adult AP patients, only 1,090 (0.001%) exhibited ACS. AP patients with ACS had elevated inpatient mortality and all major complications, including septic shock, acute respiratory distress syndrome (ARDS), requirement for total parenteral nutrition (TPN), and intensive care unit (ICU) admission (P < 0.01). These patients also exhibited increased odds of requiring pancreatic drainage and necrosectomy (P < 0.01). Predictor analysis identified blood transfusion, obesity (BMI ≥30), and admission to large teaching hospitals as factors associated with the development of ACS in AP patients. Conversely, age, female gender, biliary etiology of AP, and smoking were found less frequently in patients with ACS.

Conclusion: Our study highlights the significant morbidity, mortality, and healthcare resource utilization associated with the concurrence of ACS in AP patients. We identified potential factors associated with ACS in AP patients. Significantly worse outcomes in ACS necessitate the need for early diagnosis, meticulous monitoring, and targeted therapeutic interventions for AP patients at risk of developing ACS.