Deep vein thrombosis is a common condition seen in the Emergency Department. Standard of care for diagnosis of DVT includes a combination of a clinical pre-test probability rule known as Well's criteria, D-dimer blood testing, and Radiology department ultrasound. The purpose of this study is to determine whether Emergency Physicians can safely rule out deep vein thrombosis using Well's criteria and D-dimer blood testing combined with Emergency department bedside ultrasound.
Study Type
OBSERVATIONAL
Enrollment
227
Kingston General Hospital
Kingston, Ontario, Canada
Hotel Dieu Hospital
Kingston, Ontario, Canada
First co-primary outcome: sensitivity/specificity of LC U/S vs D-dimer in clinically "unlikely" DVT patients.
Time frame: 3 days
Second co-primary outcome: sensitivity/specificity of LC U/S plus D-dimer vs formal ultrasound in clinically "likely" DVT patients.
Time frame: 3 days
interobserver reliability of modified Well's criteria
Time frame: 3 days
learning curve for LC U/S by emergency physicians and residents
Time frame: 365 days
difference in diagnostic time interval for patients grouped by pre-test probability
Time frame: 3 days
number of return visits for formal ultrasound imaging
Time frame: 3 days
number of patients receiving empirical anticoagulation while formal ultrasound imaging is pending
Time frame: 3 days
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