Here is a post from Ryan Radecki at EM Lit of Note. His philosophy mirrors what I took from Jeff Kline the PE guru on the approach to PE workup. When you have committed to ordering a CT-PA, then get a d dimer and if NEG, CANCEL the CT. Controversial of course. But the dimer is MORE SENSITIVE than a CT. Some say the d dimer is only for “low risk” patients, but check out this study using not necessarily low risk patients.
Room9er ["Room Niner"]:
The sickest patients, who receive world-class care in the trauma/critical care bay of University of Louisville Department of Emergency Medicine
![Room9er ["Room Niner"]:](https://room9er.com/wp-content/uploads/2020/03/cropped-Screen-Shot-2020-03-08-at-3.16.16-PM.png)
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