RESPIRATORY
CHRONIC OBSTRUCTIVE PULMONARY DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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8-10 at rest
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15-20 at rest
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Either A or B
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None of the above
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Detailed explanation-1: -Pathophysiology. Normal pulmonary artery systolic pressure at rest is 18 to 25 mm Hg, with a mean pulmonary pressure ranging from 12 to 16 mm Hg. This low pressure is due to the large cross-sectional area of the pulmonary circulation, which results in low resistance.
Detailed explanation-2: -Normal systemic blood pressure is 120/80 mmHg. Normal blood pressure within the lungs is much lower and much more difficult to evaluate. Normal blood pressure in the lungs is 15-25 mmHg, or about 1/5th the bodies blood pressure. Pulmonary Hypertension results when the blood vessels constrict (tightens).
Detailed explanation-3: -There was a progressive increase in rest and exercise pulmonary artery pressures with increasing age. Pulmonary artery systolic pressures at rest and with exercise were 25±5mmHg and 33±9mmHg, respectively, in those <40 years, and 30±5mmHg and 41±12mmHg, respectively, in those ≥70 years.
Detailed explanation-4: -Normally, mean pulmonary arterial pressure is about 15 mmHg, and the pulmonary arterial systolic and diastolic pressures are about 25 and 10 mmHg, respectively.