As part of presurgical teaching for patients who are about to undergo a coronary artery bypass graft, a nurse is performing an education session with a group of surgical candidates
Which of the following teaching points best conveys an aspect of the human circulatory system?
A)
"The blood pressure varies widely between arteries and veins and between pulmonary and systemic circulation."
B)
"Only around one quarter of your blood is in your heart at any given time."
C)
"Blood pressure and blood volume roughly mimic one another at any given location in the circulatory system."
D)
"Left-sided and right-sided pumping action on each beat of the heart must equal each other to ensure adequate blood distribution."
Ans:
A
Feedback:
There is a large variation between the higher pressure in the systemic circulatory system and arteries and the lower pressure in the pulmonary system and veins. Approximately 8% of the blood supply is in the heart at any given time. Blood pressure and blood volume are inversely proportionate. The body is able to accommodate short-term differences in left-sided and right-sided output.
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