
She developed a transient anatomic shunt resulting in impaired oxygenation. Ventilation was occurring, but perfusion was inadequate causing shortness of breath. Impaired gas diffusion across alveolar membranes resulted in dyspnea and hypoxia. Which of these statements best characterises the underlying problem of her PE? The combination of normal perfusion but compromised ventilation caused hypoxia. She was subsequently diagnosed with a pulmonary embolism (PE) that resolved with anticoagulant therapy. She is extremely short of breath upon arrival at her destination. Question: A 44-year-old woman has developed calf pain during a long overseas flight. Long flights are a significant risk factor for the development of deep vein thrombosis and therefore of PEs. The main cause of PE is a deep vein thrombosis, which is a blood clot in the VEINS that break off and only have one place they can end up (in the lung). Prone positioning has also been demonstrated to increase the ratio of minute ventilation divided by PaCO 2, suggesting decreased dead-space. On average, under non-exertion conditions, the human respiratory rate is 12–15 breaths/minute.QUESTION 1 Background: A pulmonary embolism (PE) is a condition in which something lodges in the arteries of the lungs, preventing gas exchange in the portion of the lung that is blocked by the embolism. EIT demonstrated a non-dependent decrease in only-ventilated lung units and a decrease in the dead-space to shunt ratio, suggesting an improvement in V/Q matching. The number of breaths per minute is the respiratory rate.

\): A tissue layer called pleura surrounds the lung and interior of the thoracic cavity.
