Final answer:
The most likely reason for the NAP obtaining falsely low blood pressure readings is the use of a cuff that is too wide for the patient's arm circumference. Proper blood pressure measurement technique includes correct cuff size and even wrapping at the level of the heart.
Step-by-step explanation:
If the Nursing Assistive Personnel (NAP) is obtaining falsely low blood pressure readings, there could be multiple reasons, but the options provided include an improperly sized cuff, deflation issues, patient arm support, and cuff placement. The most common reason for inaccurately low readings is often related to the use of a blood pressure cuff that is too big for the arm circumference. When the cuff is too wide, it does not compress the artery sufficiently, leading to lower readings than the actual blood pressure. Moreover, if the cuff is not wrapped evenly, it can result in uneven pressure on the artery, again causing a falsely low measurement.
Proper technique in measuring blood pressure includes ensuring the cuff size is correct for the patient's arm circumference, inflating the cuff adequately, and positioning the patient's arm at heart level, supported and free of constricting clothing. If the arm is unsupported or the cuff is too loose or unevenly wrapped, these factors can contribute to incorrect readings. The NAP must be trained to follow all steps carefully to improve the accuracy of the readings they take. Retraining may be necessary to ensure proper technique and reliable results.