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Which of the following conditions increases pulmonary vascular resistance? | Which of the following conditions increases pulmonary vascular resistance? | ||
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D. Atelectasis | D. Atelectasis | ||
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==Answer== | ==Answer== | ||
The answer is D. Atelectasis. Various physiologic conditions may affect pulmonary vascular resistance (PVR). Situations that may increase PVR include hypoxia, hypercarbia and/or acidosis, positive pressure ventilation (and PEEP above FRC), high hematocrit, atelectasis (or PEEP below FRC). Situations that decrease PVR include hyperoxia or oxygen supplementation, hypocarbia and/or alkalosis, PEEP at FRC, anemia and nitric oxide. | The answer is D. Atelectasis. Various physiologic conditions may affect pulmonary vascular resistance (PVR). Situations that may increase PVR include hypoxia, hypercarbia and/or acidosis, positive pressure ventilation (and PEEP above FRC), high hematocrit, atelectasis (or PEEP below FRC). Situations that decrease PVR include hyperoxia or oxygen supplementation, hypocarbia and/or alkalosis, PEEP at FRC, anemia and nitric oxide. | ||
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==Notes== | ==Notes== | ||
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==Keywords== | ==Keywords== | ||
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<p style="text-align: center;">[[TYK About | About Test Your Knowledge]]</p> | <p style="text-align: center;">[[TYK About | About Test Your Knowledge]]</p> | ||
[[Category:TYK]] | |||
Latest revision as of 02:49, 25 September 2026
Which of the following conditions increases pulmonary vascular resistance?
A. Hyperoxia
B. Alkalosis
C. Low hematocrit
D. Atelectasis
Click for Answer
Answer
The answer is D. Atelectasis. Various physiologic conditions may affect pulmonary vascular resistance (PVR). Situations that may increase PVR include hypoxia, hypercarbia and/or acidosis, positive pressure ventilation (and PEEP above FRC), high hematocrit, atelectasis (or PEEP below FRC). Situations that decrease PVR include hyperoxia or oxygen supplementation, hypocarbia and/or alkalosis, PEEP at FRC, anemia and nitric oxide.
Notes