What is perc in pulmonary embolism?

The Pulmonary Embolism Rule-out Criteria (PERC) is an eight-item block of clinical criteria that can identify patients who can safely be discharged from the ED without further investigation for PE.

How do you use perc criteria?

The PERC rule requires a clinical suspicion of <15% before it can be applied; it should notbe applied to all patients in whom you are considering PE. Similarly, the WELLS score is notmeant to be used on all patients with chest pain or dyspnea; you must first have a genuine clinical suspicion for PE.

What is perc in medical?

The Pulmonary Embolism Rule Out Criteria (PERC) is an 8-item rule, that was derived and tested to rule out the diagnosis of Pulmonary Embolism (PE) in the Emergency Department (ED) amongst low risk patients. All centers will recruit patients with a suspicion of PE and a low pre test probability.

What is the pulmonary embolism rule out criteria?

Quiz Ref IDThe pulmonary embolism rule-out criteria (PERC) rule is an 8-item set of clinical criteria that includes arterial oxygen saturation (Spo2) of 94% or less, pulse rate of at least 100/min, patient age of 50 years or older, unilateral leg swelling, hemoptysis, recent trauma or surgery, prior PE or deep venous …

Why is there a PERC rule for mdcalc?

Dr. Kline’s comments about the PERC Rule for MDCalc: “ I derived the PERC rule to give some objective backing to the situation where you have considered PE in the active differential diagnosis, but really do not think any diagnostic test is necessary.

What is the PERC rule for pulmonary embolism calculator?

PERC rule calculator is somehow the opposite of models such as the Geneva or Wells score that stratify the risk of PE, as in this case, the test tries to rule out PE to allow further differentiated diagnosis in patients that are already put in the low risk category by previous tests.

When to use perc in patients not being evaluated for PE?

There is no need to apply the PERC rule to those patients who are not being evaluated for PE. If the patient is considered low-risk, PERC may help avoid further testing. If the patient is moderate or high risk then PERC can not be utilized. Consider d-dimer or imaging based on risk.

What is the specificity of the PERC rule?

PERC Rule interpretation. The PERC rule testing is considered to have a sensitivity of 97.4%, a specificity of 21.9% and a false negative rate of just 1% making it a valuable tool in preventing diagnostic tests to be used unnecessary, especially imagistic ones. However, in cases where PERC rule cannot be validated,…