Chapter 18 Q+A Flashcards
What is the hydrostatic pressure at all locations within the arterial circulation? (supine)
With supine individuals, the hydrostatic pressure is 0 mmHg
What is the arterial pressure at the knee of the supine patient? (supine)
140 mmHg
What is the arterial pressure in the carotid artery of the neck of the supine patient? (supine)
140 mmHg
What is the hyrdostatic pressure at all locations within the arterial circulation? (standing)
Depends on where the vessel is located
below the heart will be positive about 50 mmHg at the waist and 100 mmHg at the ankle
above the heart will be negative
What is the arterial pressure measured in the toe of the upright patient?
240 mmHg, since the toe is far below the heart the hydrostatic pressure is 100mmHg and the circulatory pressure is 140 mmHg
So, 100mmHg + 140 mmHg = 240 mmHg
What is the arterial pressure measured at this patient’s knee?
215 mmHg, the knee is somewhat below the heart it is 75 mmHg and the circulatory pressure is 140 mmHg
75 mmHg + 140 mmHg = 215 mmHg
What is the arterial pressure measured at the standing patient’s waist?
190 mmHg, the waist is slightly below the waist is 50 mmHg and the circulatory pressure is 140 mmHg
50 mmHg + 140 mmHg = 190 mmHg
What is the arterial pressure measured at the standing patient’s upper arm?
140 mmHg, since the upper arm is at heart level
What is the arterial pressure measured at the finger when the patient fully extends an arm toward the sky?
90 mmHg, since the extended finger is high above the heart, the hydrostatic pressure is -50 mmHg and the circulatory pressure is 140 mmHg
-50 mmHg + 140 mmHg = 90 mmHg
Normally, what happens to venous flow in the legs during inspiration?
decreases
All of the following occur during expiration except:
abdominal pressure increases
