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Doctor insights on: Lung Perfusion Scan

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Which procedure does a lung perfusion scan involve?

Which procedure does a lung perfusion scan involve?

Inject radioactive: A perfusion lung scan is done by injectecting a low-dose radioactive tracer into a vein and taking images showing where blood flow is going in the lungs. It is used to diagnose pulmonary embolism (blood clot to the lungs). The test is safe and generally free of any side effects. It is used less often now than ct angiogram, but is safer and involves less radiation exposure. ...Read more

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Lung (Definition)

Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the ...Read more


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What are the side effects of lung perfusion scan?

What are the side effects of lung perfusion scan?

Usually none: The dose of radioactivity given is small, and the test is considered safe and harmless. If a woman is pregnant, the use of any radioactive material must be carefully weighed as to potential benefits vs risks to the fetus. ...Read more

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What person needs a lung ventilation/perfusion scan?

What person needs a lung ventilation/perfusion scan?

: Folks with a suspicion for blood clot in the lung. This may be due to spells of breathlessness or chest pain or both. More common if there is blood clots in the leg (phlebitis). ...Read more

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What does blood clot in the lungs (pulmonary embolus) show on ventilation perfusion scan?

Lack of blood flow: A ventilation perfusion scan is a test for a blood clot in the lungs, or pulmonary embolism. If there is a blood clot, an area of the lung will not be perfused, but will be ventilated, and therefore a mismatch will be seen. ...Read more

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What is the function of a vent perfusion scan?

Dx Pulmonary Embolus: A ventillation perfusion lung scan is a nuclear test used to diagnose a blood clot to the lung or pulmonary embolus. Medication is injected into your vein and you also breath a medication into the lung to look for a mismatch on a nuclear imaging camera which would suggest a pulmonary embolus. ...Read more

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How is a cardiac perfusion scan used?

How is a cardiac perfusion scan used?

Find Bockages: Myocardial perfusion imaging is typically combined with exercise. This test is used to diagnose coronary artery disease in patients with typical symptoms or patients with high risk for coronary artery disease. ...Read more

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What is a ventilation-perfusion scan?

What is a ventilation-perfusion scan?

Radiological test: A ventilation-perfusion (v/q) scan is a specialized radiological lung test comparing mismatches between any part of your lung that still exchanges oxygen (affected in COPD e.g.) and any part that is not receiving blood flow. This is done through radio-tracers. A mismatch means there is a clot in that part of the lung hindering blood flow. Diseases & surgery of the lung complicate interpretation. ...Read more

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What is a pulmonary perfusion scan used for?

What is a pulmonary perfusion scan used for?

Blood clots : A blood clot that floats into the lung interferes with blood flow to that segment. A lung perfusion scan with will show a hole (no blood flow) behind the clot. ...Read more

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What are the risks in having a myocardial perfusion scan?

What are the risks in having a myocardial perfusion scan?

Stress associated : A myocardial perfusion scan is performed in two steps. One injection of a radiotracer at rest and another at stress ( either treadmill or pharmacological stress test with adenosine, regadenoson, dobutamine, dipyridamole). Only few skin reactions have been reported with the radiotracer injection. Risks are more associated with the stress used for the test such has angina, headache, nausea... ...Read more

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Perfusion (Definition)

Perfusion usually refers to blood flow into an ...Read more