Annals of surgery · 2012
Predicting risk for venous thromboembolism with bariatric surgery: results from the Michigan Bariatric Surgery Collaborative.
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Finks Jonathan F, English Wayne J, Carlin Arthur M, Krause Kevin R, Share David A, Banerjee Mousumi, Birkmeyer John D, Birkmeyer Nancy J, Michigan Bariatric Surgery Collaborative, Center for Healthcare Outcomes and Policy
Аннотация
OBJECTIVE: We sought to identify risk factors for venous thromboembolism (VTE) among patients undergoing bariatric surgery in Michigan.
BACKGROUND: VTE remains a major source of morbidity and mortality after bariatric surgery. It is unclear which factors should be used to identify patients at high risk for VTE.
METHODS: The Michigan Bariatric Surgery Collaborative maintains a prospective clinical registry of bariatric surgery patients. For this study, we identified all patients undergoing primary bariatric surgery between June 2006 and April 2011 and determined rates of VTE. Potential risk factors for VTE were analyzed using a hierarchical logistic regression model, accounting for clustering of patients within hospitals. Significant risk factors were used to develop a risk calculator for development of VTE after bariatric surgery.
RESULTS: Among 27,818 patients who underwent bariatric surgery during the study period, 93 patients (0.33%) experienced a VTE complication, including 51 patents with pulmonary embolism. There were 8 associated deaths. Significant risk factors included previous history of VTE (OR 4.15, CI 2.42-7.08); male gender (OR 2.08, CI 1.36-3.19); operative time more than 3 hours (OR 1.86, CI 1.07-3.24); BMI category (per 10 units) (OR 1.37, CI 1.06-1.75); age category (per 10 years) (OR 1.25, CI 1.03-1.51); and procedure type (reference adjustable gastric band): duodenal switch (OR 9.45, CI 2.50-35.97); open gastric bypass (OR 6.48, CI 2.17-19.41); laparoscopic gastric bypass (OR 3.97, CI 1.77-8.91); and sleeve gastrectomy (OR 3.50, CI 1.30-9.34). Nearly 97% of patients had a predicted VTE risk less than 1%.
CONCLUSIONS: In this population-based study, overall VTE rates were low among patients undergoing bariatric surgery. The use of an empirically based risk calculator will allow for the development of a risk-stratified approach to VTE prophylaxis.
BACKGROUND: VTE remains a major source of morbidity and mortality after bariatric surgery. It is unclear which factors should be used to identify patients at high risk for VTE.
METHODS: The Michigan Bariatric Surgery Collaborative maintains a prospective clinical registry of bariatric surgery patients. For this study, we identified all patients undergoing primary bariatric surgery between June 2006 and April 2011 and determined rates of VTE. Potential risk factors for VTE were analyzed using a hierarchical logistic regression model, accounting for clustering of patients within hospitals. Significant risk factors were used to develop a risk calculator for development of VTE after bariatric surgery.
RESULTS: Among 27,818 patients who underwent bariatric surgery during the study period, 93 patients (0.33%) experienced a VTE complication, including 51 patents with pulmonary embolism. There were 8 associated deaths. Significant risk factors included previous history of VTE (OR 4.15, CI 2.42-7.08); male gender (OR 2.08, CI 1.36-3.19); operative time more than 3 hours (OR 1.86, CI 1.07-3.24); BMI category (per 10 units) (OR 1.37, CI 1.06-1.75); age category (per 10 years) (OR 1.25, CI 1.03-1.51); and procedure type (reference adjustable gastric band): duodenal switch (OR 9.45, CI 2.50-35.97); open gastric bypass (OR 6.48, CI 2.17-19.41); laparoscopic gastric bypass (OR 3.97, CI 1.77-8.91); and sleeve gastrectomy (OR 3.50, CI 1.30-9.34). Nearly 97% of patients had a predicted VTE risk less than 1%.
CONCLUSIONS: In this population-based study, overall VTE rates were low among patients undergoing bariatric surgery. The use of an empirically based risk calculator will allow for the development of a risk-stratified approach to VTE prophylaxis.