Nevada Certified Nursing Assistant (CNA) Practice Exam

Using a calibrated sphygmomanometer and stethoscope while placing the cuff snugly around the upper arm is the correct method for taking a patient's blood pressure. This approach ensures accuracy and reliability in the measurement. The upper arm is the standard site for blood pressure measurement because it allows for consistent placement of the cuff over the brachial artery, providing a more accurate reading than other sites.

Using a calibrated sphygmomanometer is essential because it guarantees that the equipment provides precise measurements. Regular calibration ensures that the device is functioning correctly and reflects actual blood pressure levels. The stethoscope is necessary to auscultate the sounds of Korotkoff, which are the sounds heard when the blood begins to flow back into the artery as the cuff pressure is released.

Additionally, placing the cuff snugly is important to ensure a proper fit, as a cuff that is too loose or improperly positioned can lead to inaccurate readings. Measuring blood pressure in a sitting or supine position, rather than while standing, minimizes the impact of gravity on blood flow and helps provide a more stable and accurate measurement.