How long must a patient with pulmonary embolism be symptom-free before they can be certified?

Patients with a history of pulmonary embolism must be symptom-free for a period of three months before they can be certified for certain medical purposes, such as obtaining a commercial driver's license. This three-month period is based on the understanding that, following a pulmonary embolism, there is a significant risk for recurrence, and a buffer period allows for adequate healing and assessment of stability. The medical guidelines emphasize ensuring that patients remain asymptomatic and have a low risk of further thromboembolic events before issuing a certification. It also allows for any necessary medical follow-up or treatment to ensure the patient has made a full recovery. Thus, the three-month requirement fosters safe practices, especially for individuals in high-responsibility occupations.