Evidence-based literature supports the practice of determining the clinical pretest probability of pulmonary embolism before proceeding with diagnostic testing. A clinical practice guideline, Current Diagnosis of Venous Thromboembolism in Primary Care, from the American Academy of Family Physicians (AAFP) and the American College of Physicians (ACP), recommends that validated clinical prediction rules be used to estimate pretest probability of pulmonary embolism and to interpret test results. Clinical scoring algorithms are less objective and less powerful than some authors would claim.Below are 2 validated systems:
The Modified Wells Scoring System and the Revised Geneva Scoring System. Simplified versions of the Wells score and the revised Geneva score have been developed. Initial studies support the validity of these scores. Points are assigned to each of the criteria.
To see complete information on pulmonary embolism, please see Medscape Reference article Pulmonary Embolism.