Part D- Module 21.4 Gas Exchange CBRT Exercise Part 3 The delay in the onset of

Question

Part D- Module 21.4 Gas Exchange CBRT Exercise Part 3 The delay in the onset of symptoms following phosgene exposure makes the difficult. To ensure that each patient received appropriate care, the CBRT put a system into place whereby asymptomatic 2) serious (patients experiencing dyspnes without signs of pulmonary edema), or 3) ritical (patients with signs of pulmonary edema) task of deaiding which patients will need extensive care and which will not very presenting patients were dassified as either. 1) As pulmonary edema worsens, the alveoli fill with fluid, which prevents gas exchange from taking place altogether, and results in hypoxemia and hypercapnia. The severity of the hypoxemia and hypercapnia can be determined by measuring the arterial blood gases, which is a test that evaluates arterial blood for its Po2 and Pco2 The patients in our soenario had decreased Poz and increased Pco2, which was not surprising considering that their alveoli were filled with fluid In severe pulmonary edema, supplemental oxygen is often inadequate to maintain the Poz within a normal range, and mechanical ventilation is required to restore oxygenation. Patients exposed to phosgene require a type of mechanical ventilation called high positive end-expiratory pressure (high PEEP) High PEEP maintains a high pressure inside the alveoli during expiration so that intrapuimonary pressure remains higher than atmospheric pressure. This prevents collapse of the alveoli during expiration and facilitates gas exchange. High PEEP is typically effective, but can lead to further complicabions if it is prolanged Phosgene gas dereases the efficienoy of pulmonary gas exchange How might phosgene gas affect the respiratory membrane to diredtly impair pulmonary gas exchange? O Decrease the surface ares of the respiratory membrane O Alter the perfusion of the tissue O Ingrease the blood fiow in capiliaries of alveoli with higher Po2 O Decrease the thiakness of the respiratory membrane My Answers Give Ue

Explanation / Answer

The third option is correct. Phosgene gas causes the pulmonary edema in people exposing to the gas. Phosgene gas increases blood flow in alveoli. The pulmonary edema reflects its mechanism and suggests that it causes fluid accumulation after blood flow in alveoli. It causes difficulty in reparation. Phosgene gas takes two days to accumulate fluid in the lung.

Therefore, the third option is correct.

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