Visualisation Ventilation-perfusion Matching Occurring Human Lung Stock Footage Video (100% Royalty-free) 2803939 | Shutterstock
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Visualisation Ventilation-perfusion Matching Occurring Human Lung …
Sep 19, 2012
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The respiratory process consists of three components. Ventilation, diffusion and perfusion. Ventilation consists of two parts: - Inspiration, which is the expansion of the chest with a negative intrapulmonary pressure when air flows into the thorax; and - Expiration, when the intrapulmonary pressure is higher than the atmosphere, air will flow out of the lungs. Diffusion is the process whereby gases move from an area of high pressure to low pressure. This includes during: - Internal respiration
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🫁🩺🔵 V/Q mismatch occurs when ventilation (V, air reaching the alveoli) and perfusion (Q, blood flow to the alveoli) are not properly matched, leading to impaired gas exchange. 🔵Types of V/Q Mismatch: 🔵1. Low V/Q (Shunt-like effect) – Perfusion is adequate, but ventilation is reduced (e.g., pneumonia, COPD, pulmonary edema). This leads to hypoxemia because oxygen cannot reach the blood efficiently. 🔵 2. High V/Q (Dead space effect) – Ventilation is adequate, but perfusion is reduced (e.g.,
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