What is the main hemodynamic parameter that measures preload?
Systolic Blood Pressure.
Mean Arterial Blood Pressure.
Central Venous Pressure (CVP).
Systemic Vascular Resistance.
The Correct Answer is C
Choice A reason: Systolic Blood Pressure is not a direct measure of preload; it indicates the pressure in the arteries during the contraction of the heart muscles.
Choice B reason: Mean Arterial Blood Pressure is an average blood pressure in an individual during a single cardiac cycle, but it does not specifically measure preload.
Choice C reason: Central Venous Pressure (CVP) is a direct measure of the blood volume returning to the heart and the ability of the heart to pump the blood into the arterial system, making it a key indicator of preload.
Choice D reason: Systemic Vascular Resistance refers to the resistance to blood flow offered by all of the systemic vasculature, excluding the pulmonary vasculature, and is not a measure of preload.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Requesting a job that requires sitting all day does not reflect an understanding of correct body mechanics or how to manage chronic back pain through activity.
Choice B reason: Beginning exercises to strengthen the lower back indicates that the patient understands the importance of muscle strength in supporting the spine and preventing back pain.
Choice C reason: Keeping the back straight while lifting is important, but the statement about lifting "heavy objects above my waist" suggests a misunderstanding, as lifting objects above the waist increases the risk of back injury.
Choice D reason: Sleeping with knees and back extended is not recommended for preventing back pain. It is better to sleep with knees slightly bent to maintain the natural curve of the spine.
Correct Answer is C
Explanation
Choice A reason: Lactated Ringer's solution does not provide the necessary glucose and may not be compatible with TPN.
Choice B reason: 0.45% sodium chloride (0.45% NaCl) is a hypotonic solution and does not provide adequate calories for a patient on TPN.
Choice C reason: 10% dextrose in water (D10W) is the appropriate choice as it provides a source of calories and prevents hypoglycemia until the next TPN bag is available.
Choice D reason: 5% dextrose in lactated Ringer's solution (D5LR) provides less dextrose than D10W and may not prevent hypoglycemia as effectively.
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