What is a V/Q Scan Test?
A ventilation/perfusion scan, or V/Q Scan, is a diagnostic procedure used to evaluate blood flow and airflow in the lungs. This test is typically performed when there is suspicion of pulmonary embolism, a condition where a blood clot blocks one of the main arteries in the lung. It can also assess other lung conditions, such as chronic obstructive pulmonary disease (COPD) or pulmonary hypertension.
The test involves two parts: the ventilation scan and the perfusion scan. During the ventilation scan, a radioactive gas mixture is inhaled through a mask or mouthpiece while lying on a table under a camera. This allows for images to be taken of airflow through the lungs. In the perfusion scan, a small amount of radioactive material is injected into a vein, and images are taken to show blood flow through the lungs.
A V/Q scan is often performed when there are symptoms or risk factors for pulmonary embolism, such as sudden shortness of breath, chest pain, or a history of blood clots. It may also be done to evaluate lung function before surgery or to monitor the effectiveness of treatment for lung conditions.
To prepare for a V/Q scan, patients may be asked to avoid caffeine and certain medications beforehand. The procedure itself is non-invasive and typically takes about 30 minutes. Patients must lie still during the scans but otherwise should experience minimal discomfort.
After the V/Q scan is completed, a radiologist will record the results in a V/Q Scan Test Report. This report will include a detailed description of the findings and any abnormalities. If a pulmonary embolism is suspected, additional imaging tests may be recommended to confirm the diagnosis.











