title: Unanticipated variations between expected and delivered pneumatic compression therapy after elective hip surgery: a possible source of variation in reported patient outcomes.
abstract: The differences between the pneumatic compression thromboprophylaxis delivered after elective total hip arthroplasties and that was expected were quantified before (49 patients) and after a concerted nursing education program (30 patients) that was designed to ensure maximum compliance and to verify the correct application of the devices. The expected therapy was not delivered to any of the patients monitored. Therapy was delivered only an average of 77.8% of the time during the expected treatment periods. During 99.9% of the expected therapy times, values of key outcomes-related parameters of the therapy delivered to the patients varied by >10% from expected values. These variations were not reduced significantly by medical and nursing education. This variation may be a significant confounding factor in comparatively evaluating thromboembolic disease outcome reports.
authors.affiliation: Division of Reconstructive Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
authors.forename: F S
authors.initials: FS
authors.lastname: Haddad
authors.forename: R M
authors.initials: RM
authors.lastname: Kerry
authors.forename: J A
authors.initials: JA
authors.lastname: McEwen
authors.forename: L
authors.initials: L
authors.lastname: Appleton
authors.forename: D S
authors.initials: DS
authors.lastname: Garbuz
authors.forename: B A
authors.initials: BA
authors.lastname: Masri
authors.forename: C P
authors.initials: CP
authors.lastname: Duncan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000451:nursing; D017558:Elective Surgical Procedures; D005260:Female; D005676:Gravity Suits / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009732:Nursing Care; D011312:Pressure; D011446:Prospective Studies; D011655:Pulmonary Embolism / Q000209:etiology / Q000451:nursing / Q000517:prevention & control*; D016896:Treatment Outcome; D020246:Venous Thrombosis / Q000209:etiology / Q000451:nursing / Q000517:prevention & control*