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Mortality Related to Bariatric Surgery (MORSE Study): A Retrospective, International Collaborative Audit
Vignesh Balasubaramaniam1, Geoffrey Yuet Mun Wong2, Alessandro Martinino3
1Department of Surgery, Ysbyty Gwynedd Hospital NHS Trust, Bangor, Wales, UK.
Clinical Obesity
|June 18, 2025
Summary
Bariatric surgery has risks, with gastrointestinal leaks and pulmonary embolism being key causes of death. Understanding these early and late mortality factors is crucial for improving patient safety and outcomes.
Area of Science:
- Surgical Oncology
- Gastroenterology
- Public Health
Background:
- Bariatric surgery, while effective for obesity, carries risks of early and late mortality.
- Understanding specific causes of death is vital for improving patient outcomes.
Purpose of the Study:
- To analyze early (≤90 days) and delayed (>90 days) mortality following bariatric surgery.
- To identify common causes of death attributed to bariatric procedures.
Main Methods:
- Retrospective collaborative audit of bariatric surgery patients who died.
- Data collected from 30 centers across 21 countries between January 1, 2022, and December 31, 2022.
- Descriptive analysis of patient demographics and causes of mortality.
Main Results:
- 82 patient deaths related to bariatric surgery were analyzed.
- 58 deaths (70.7%) occurred within 90 days, and 24 deaths (29.3%) occurred after 90 days.
- Common causes included gastrointestinal leaks, pulmonary embolism, respiratory infections, malnutrition, coronary heart disease, and bleeding.
Conclusions:
- Bariatric surgery mortality can occur both early and late post-procedure.
- Gastrointestinal leaks and pulmonary embolism are significant causes of early mortality.
- Malnutrition and gastrointestinal leaks are notable causes of delayed mortality.
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