In respiratory physiology, the ventilation/perfusion ratio (V/Q ratio) is a ratio used to assess the efficiency and adequacy of the ventilation-perfusion coupling and thus the matching of two …

2023年6月28日 · When this ratio is above or below 0.8, you may have ventilation/perfusion (V/Q) mismatch. A V/Q mismatch happens when part of your lung receives oxygen without blood …

2025年1月2日 · A V/Q mismatch refers to an imbalance between ventilation (V) and perfusion (Q) in the lungs. It means that certain regions of the lungs are not optimally exchanging gases due …

What is a VQ scan used for? Providers most often use a VQ scan to diagnose a blood clot in your lungs (pulmonary embolism, or PE). A pulmonary embolism can be fatal if left untreated. It’s …

2024年9月24日 · Ventilation-perfusion (V/Q) mismatch occurs when either the ventilation (airflow) or perfusion (blood flow) in the lungs is impaired, preventing the lungs from optimally delivering …

2025年3月20日 · A V/Q mismatch occurs when there is an imbalance between ventilation (V) and perfusion (Q) in different areas of the lungs. Ideally, ventilation and blood flow should be …

A ventilation/perfusion lung scan, also called a V/Q lung scan, or ventilation/perfusion scintigraphy, is a type of medical imaging using scintigraphy and medical isotopes to evaluate …

2023年1月23日 · Ventilation (V) refers to the flow of air into and out of the alveoli, while perfusion (Q) refers to the flow of blood to alveolar capillaries. Individual alveoli have variable degrees of …

2023年3月24日 · What is the test? The ventilation-perfusion scan is a nuclear scan so named because it studies both airflow (ventilation) and blood flow (perfusion) in the lungs. The initials …

A V/Q scan consists of two imaging tests that measure the air and blood flow in your lungs. It's most often used to check for a blood clot (pulmonary embolism).