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 to either inadequate ventilation relative to blood flow or inadequate blood flow relative to ventilation.

2025年1月3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 matched for optimal gas exchange. A V/Q mismatch can lead to inefficient oxygen uptake or CO2 removal.

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 oxygen to the blood.

2016年5月27日 · Learn the basics of V/Q mismatch, the A:a gradient, intrapulmonary shunting and dead space as well as what the typical causes and treatments are.

2023年1月23日 · Collective changes in ventilation and perfusion in the lungs are measured clinically using the ratio of ventilation to perfusion (V/Q). Changes in the V/Q ratio can affect gas exchange and can contribute to hypoxemia. Gas exchange occurs in the respiratory zone of the lung, where alveoli are present.

2023年1月13日 · In the V/Q lung scan, an aerosol and injectable radioactive tracer are used to assess lung ventilation (V) and perfusion (Q) to identify V/Q mismatch areas. The most common clinical indication for a V/Q lung scan is to assess the likelihood of pulmonary embolism (PE) when contrast or radiation exposure is contraindicated.

Beyond its impact on gas exchange, V / Q mismatch is a predictor of adverse outcomes in patients with ARDS; more recently, its role in ventilation-induced lung injury and worsening lung edema has been described.

2023年7月16日 · Ventilation-Perfusion Mismatch. If alveolar ventilation and alveolar blood flow are not matched, this will be reflected in the V/Q ratio. When there is inadequate ventilation the V/Q reduces, and gas exchange within the affected alveoli is impaired.

2018年10月16日 · V/Q mismatch is usually caused by an issue with the lungs that decreases or increases ventilation or perfusion. This means anything that interferes with the lung’s ability to receive fresh air into the alveoli or anything that prevents blood from flowing to the capillaries.

2020年4月1日 · It sounds smart because it is, and there’s a very good chance that a ventilation perfusion (VQ) mismatch is why your patient is hypoxic. Let’s investigate what this really means so that when you drop knowledge bombs like this in front of your residents and attendings, you have some data and understanding to back it up.