There is no need to apply the perc rule to those patients who are not being evaluated for pe. This perc rule calculator is used to rule out patients that are already deemed to have a low risk of pulmonary embolism to allow searching a different diagnosis. All other patients should be considered for further testing with.
Perc stands for pulmonary embolism rule out criteria. Check all of the following that are true: In patients with a low probability of pe who fullfil all eight criteria, the likelihood of pe is low and no further testing is required.