What does the PERC score help assess?

The PERC score, or Pulmonary Embolism Rule-Out Criteria, is a clinical tool specifically designed to assess the risk of pulmonary embolism (PE) in patients who present with potential symptoms, such as chest pain or shortness of breath. The score consists of a set of eight criteria that, if met, indicate that the patient is at a low enough risk for PE that further testing, such as a CT angiogram or D-dimer testing, may not be necessary.

By using the PERC score, clinicians can efficiently rule out the presence of a pulmonary embolism and avoid exposing patients to unnecessary tests and procedures when the likelihood of the condition is low. This approach also aids in focusing resources and attention on those who are at higher risk and may benefit from further diagnostic evaluation and potential treatment.

In the context of the question, the PERC score's primary use is to assist in determining the risk associated specifically with pulmonary embolism, making it the correct choice. Other conditions mentioned, such as stroke, ectopic pregnancy, or concussion, do not relate to the function or aim of the PERC scoring system.