Diagnosis of Deep Vein Thrombosis in Outpatients With Musculoskeletal Disorders: A Survey of Orthopaedic and Sports Academies

Abstract

Venous thromboembolism can present as either a deep vein thrombosis (DVT) or a pulmonary embolism. The purpose of this study was to determine if there was a difference in physical therapists' estimation of the probability of a patient having a DVT in patient vignettes as compared with the modified Wells criteria prediction. Members of the American Academy of Orthopaedics, Academy of Orthopaedic Physical Therapists (AOPT), and American Academy of Sports Physical Therapy (AASPT) completed patient vignettes. Descriptive statistics were calculated, and sign tests assessed for differences between responses of the presence of DVT (likely or unlikely) and whether referral was necessary. Six hundred and seventy consented, and 521 completed the survey of 24,028 members from the AOPT and AASPT. In total, 7.2% did not feel competent to screen for DVT. Descriptive statistics revealed difficulty in determining whether a DVT was likely or unlikely in 4/5 vignettes as compared with the modified Wells criteria, with only vignette 2 having 95.9% correctly answering as DVT being unlikely. In the other 4 vignettes, approximately 60% to 70% of respondents estimated DVT to be likely, despite 2 of these being unlikely. Across the vignettes, between 2.3% and 19.2% more respondents chose to refer when they determined if a DVT was likely. Across vignettes, statistically significant differences between DVT being likely or unlikely and decision to refer were present. Respondents consistently chose to refer even when a DVT was unlikely (P < .001 for vignettes 1, 3–5. P = .038 for vignette 2). Venous thromboembolisms are potentially life-threatening conditions seen by physical therapists. Members of the AOPT and AASPT have difficulty in determining the presence or absence of DVT in clinical case vignettes, with some demonstrating a conservative management decision to refer despite low probability of DVT. Efforts to educate members should be considered to improve the understanding of DVT assessment. Members of the AOPT and AASPT appear to have difficulty in determining the presence of a DVT in clinical patient vignettes. Respondents chose to refer patients perhaps with conservative caution. Efforts to educate therapists should be considered to improve the understanding of DVT assessment.