Risk Factors and Outcomes Associated with Emergency Abdominal Surgery following Lower Extremity Total Joint Arthroplasty.

Objectives: This study aims to identify potential risk factors and assess postoperative outcomes associated with requiring emergency abdominal surgery (EAS) within 30 days following total hip arthroplasty (THA) and total knee arthroplasty (TKA). We hypothesized that patients requiring EAS would carry a higher morbidity and mortality rates compared to patients that underwent the index operation alone. Methods: We conducted a retrospective analysis using TriNetX, examining data from 2016-2024 from patients over 18 years old who underwent THA/TKA and required EAS within 30 days. Postoperative outcomes, including mortality and hospital readmission, were compared between patients requiring EAS and those who did not. Statistical analyses included measures of association and chi-squared tests. Patient demographic data, including age, sex, and comorbidities were analyzed. Results: Patients requiring EAS within 30 days of a joint arthroplasty were significantly more likely to be older, overweight or obese, and to be diagnosed with comorbidities including diverticular disease, cholelithiasis, alcohol use disorders, and tobacco use. These patients had significantly higher mortality rates within 60 days of joint arthroplasty compared to patients without EAS, suggesting that the second operation contributed significantly to the increase in adverse outcomes. Conclusion: This study emphasizes the importance of recognizing key risk factors for severe GI complications that require EAS. These findings highlight the need for careful patient selection, pre-operative evaluation of risk, and vigilant post-operative management, especially in those with many risk factors. Improved identification and management of high-risk patients may help reduce the likelihood of EAS and its associated mortality.