Accuracy of the D-Dimer Assay for the Exclusion of Pulmonary Embolism in a High Risk Oncologic Population
The purpose of this study is to see if a blood test (D-dimer) is as precise as the CT scan for the detection of clots.
A pulmonary embolism is an obstruction of the blood vessels in your lungs usually due to a blood clot that travels to the lungs usually from the leg. Research has shown that the results of a specific blood test (D-dimer) can be used instead of a CT scan to diagnose clots. D-dimer is a valuable diagnostic marker in either detecting the presence of or monitoring the progress of blood clots. D-dimer assays have proven to be a beneficial diagnostic tool in the evaluation of patients with suspected pulmonary embolism (PE).
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Accuracy of the D-Dimer Assay for the Exclusion of Pulmonary Embolism in a High Risk Oncologic Population: A Correlation With Ct Pulmonary Angiogram in the Urgent Care Setting|
- The negative predictive value of the d-dimer assay relative to CT pulmonary angiogram will be the primary measure of accuracy used for this purpose. [ Time Frame: conclusion of study ] [ Designated as safety issue: No ]
- To estimate the positive predictive value, sensitivity, and specificity of the d-dimer assay relative to CT pulmonary angiogram. [ Time Frame: conclusion of study ] [ Designated as safety issue: No ]
- To explore the association between the accuracy of the d-dimer assay and clinical symptoms indicating pulmonary embolism. [ Time Frame: conclusion of study ] [ Designated as safety issue: No ]
|Study Start Date:||May 2005|
|Study Completion Date:||June 2008|
|Primary Completion Date:||June 2008 (Final data collection date for primary outcome measure)|
Patients to have a CT pulmonary angiogram for suspected pulmonary embolism will have a d-dimer drawn as is routinely done.
Procedure: CT pulmonary angiogram and d-dimer draw
A CT pulmonary angiogram and a d-dimer drawn within 24 hours.