When a nurse obtains an unusually low blood pressure measurement for a client whose blood pressure is generally elevated, she considers the possibility of a problem with her technique. Which of the following sources of error should she consider as a possible cause of the low reading?
Wrapping the cuff too loosely around the client's arm
Measuring blood pressure right after the client's mealtime
Positioning the client's arm above heart level
Deflating the cuff too slowly
The Correct Answer is C
The correct answer is: c. Positioning the client’s arm above heart level.
Choice A: Wrapping the cuff too loosely around the client’s arm
Wrapping the cuff too loosely can lead to an inaccurately high blood pressure reading, not a low one. A loose cuff does not compress the artery properly, causing the device to overestimate the pressure needed to occlude the artery.
Choice B: Measuring blood pressure right after the client’s mealtime
Measuring blood pressure right after a meal can cause a slight increase in blood pressure due to the body’s metabolic response to digestion. This is not a common cause of a low blood pressure reading.
Choice C: Positioning the client’s arm above heart level
Positioning the client’s arm above heart level can lead to an inaccurately low blood pressure reading. When the arm is elevated, the hydrostatic pressure decreases, resulting in a lower reading. This is a well-known source of error in blood pressure measurement.
Choice D: Deflating the cuff too slowly
Deflating the cuff too slowly can cause venous congestion, which may lead to an inaccurately high reading rather than a low one. The standard deflation rate is 2-3 mm Hg per second to ensure accurate measurement.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: The diaphragm of the stethoscope is used for high-pitched sounds such as breath sounds, bowel, and normal heart sounds. For the apical pulse, which involves listening to the heart's sounds, the bell of the stethoscope is often recommended, especially for lower-pitched sounds like murmurs.
Choice B reason: Counting the apical pulsations for a full minute is the correct action when assessing the apical pulse, particularly for clients on cardiovascular medications. This ensures accuracy in detecting any irregularities or changes in the heart rate that could be affected by the medications.
Choice C reason: The stethoscope should be placed gently against the client's skin. Pressing too firmly can distort the heart sounds, making it difficult to accurately assess the apical pulse.
Choice D reason: A Doppler device is not typically used for routine assessment of the apical pulse. It is more commonly used when pulses are difficult to palpate or auscultate, such as in cases of peripheral arterial disease.
Correct Answer is B
Explanation
Choice A reason: A systemic infection would affect the entire body or multiple systems, not just the urinary tract. While a urinary tract infection can become systemic if it leads to sepsis, the scenario provided does not specify such progression.
Choice B reason: A health care-associated infection (HAI) is an infection that a patient acquires while receiving treatment for another condition within a healthcare setting. Since the infection occurred after the insertion of a urinary catheter in a hospital, it is considered an HAI.
Choice C reason: An endogenous infection originates from the host's own microbial flora. The scenario does not provide enough information to determine if the infection was caused by the client's own flora or by external sources.
Choice D reason: An exogenous infection comes from outside the body. While the urinary tract infection could be exogenous, the scenario suggests it is more likely to be health care-associated due to the timing and context of the catheter insertion.
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