A systematic review of mechanical thromboprophylaxis in the lithotomy position

Abstract

BackgroundVenous thrombosis and compartment syndrome are potentially serious complications of prolonged, lithotomy position surgery. It is unclear whether mechanical thromboprophylaxis in this group of patients modifies the risk of compartment syndrome. This qualitative systematic review examines the evidence base to guide clinical practice. MethodA systematic review was performed guided by Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) criteria, to identify studies reporting relationships between lithotomy position, compartment syndrome and mechanical thromboprophylaxis. The aim was to determine if mechanical thromboprophylaxis influenced compartment syndrome risk in the lithotomy position. ResultsSixteen studies were identified: eight case reports or case series (12 patients), two completed audit cycles (approximately 2000 patients), four reviews and two volunteer case control studies (33 subjects). There were no randomised studies. Nine studies associated mechanical thromboprophylaxis with compartment syndrome risk but in each case a causative relationship was speculative. In contrast, five papers, including an experimental, cohort study and two observational, population studies recommended intermittent pneumatic compression as prevention against compartment syndrome in lithotomy position. One review and one case report were unable to make a recommendation. ConclusionsThe level of evidence addressing the interaction between the lithotomy position, compartment syndrome and mechanical thromboprophylaxis is weak. There is no conclusive evidence that mechanical thromboprophylaxis causes compartment syndrome in the lithotomy position. There is limited evidence to suggest intermittent pneumatic compression may be a safe method of mechanical thromboprophylaxis if accompanied by strict adherence to other measures to reduce the chance of compartment syndrome. However further studies are required.