A nurse who is mentoring a graduate nurse explains the correlation between severe blood loss and the effect on the client's mean arterial pressure (MAI The graduate nurse demonstrates correct understanding when he states which of the following:
It raises cardiac output and MAP.
It causes vasoconstriction and increased MAP.
There is no direct correlation to MAP.
Lower blood volume lowers MAP.
The Correct Answer is D
A. Severe blood loss actually decreases blood volume, which leads to decreased cardiac output and ultimately lower MAP.
B. While it's true that the body initially responds to blood loss by vasoconstricting to maintain blood pressure, this compensatory mechanism can only last for so long. As blood loss continues, MAP will decrease.
C. There is no direct correlation to MAP. MAP is directly influenced by cardiac output and systemic vascular resistance (SVR). Blood volume is a major determinant of both.
D. A decrease in blood volume leads to decreased preload, which reduces cardiac output. This, in turn, lowers MAP.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pupils round, 2mm and constricting to light is a normal pupil response.
B. Decreasing level of consciousness is a critical sign of deteriorating neurological status and requires immediate medical intervention.
C. Temporal headache is a common symptom after head injury but it is not as urgent as a decreasing level of consciousness.
D. Glasgow coma score of 13 indicates a mild to moderate head injury, but it's a static measurement. A decreasing level of consciousness would indicate worsening condition.
Correct Answer is D
Explanation
A. Severe blood loss actually decreases blood volume, which leads to decreased cardiac output and ultimately lower MAP.
B. While it's true that the body initially responds to blood loss by vasoconstricting to maintain blood pressure, this compensatory mechanism can only last for so long. As blood loss continues, MAP will decrease.
C. There is no direct correlation to MAP. MAP is directly influenced by cardiac output and systemic vascular resistance (SVR). Blood volume is a major determinant of both.
D. A decrease in blood volume leads to decreased preload, which reduces cardiac output. This, in turn, lowers MAP.
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