Which of the following is the correct procedure for measuring an adult's blood pressure using a manual sphygmomanometer?

Place the stethoscope over the patient's chest and listen for the first sound to appear

Inflate the cuff to 140 mmHg and release it quickly while palpating the radial pulse

Inflate the cuff to 100 mmHg, then slowly deflate while listening for Korotkoff sounds

Inflate the cuff to 30 mmHg above the patient's estimated systolic pressure, then slowly deflate and listen for Korotkoff sounds

Answer and Explanation

The Correct Answer is D

Rationale:

A. Placing the stethoscope over the patient’s chest and listening for the first sound is incorrect because blood pressure is measured by auscultating the brachial artery in the antecubital fossa, not the chest.

B. Inflating the cuff to 140 mmHg and releasing it quickly while palpating the radial pulse is incorrect because 140 mmHg may not exceed the patient’s systolic pressure, and rapid deflation can lead to an inaccurate reading.

C. Inflating the cuff to 100 mmHg and slowly deflating while listening for Korotkoff sounds is incorrect because in many adults this pressure may not be sufficient to occlude the brachial artery, which can result in a falsely low measurement.

D. Inflating the cuff to 30 mmHg above the patient’s estimated systolic pressure and slowly deflating while listening for Korotkoff sounds is correct. The cuff should be placed on the bare upper arm at heart level, and the stethoscope positioned over the brachial artery. The first Korotkoff sound heard indicates systolic pressure, and the disappearance of sound indicates diastolic pressure. Inflating above the estimated systolic pressure ensures the artery is fully occluded, allowing for an accurate reading.

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Correct Answer is C

Explanation

Rationale:

A. Blood pressure is objective data because it is measurable, observable, and quantifiable. The nurse can obtain this information using a blood pressure cuff and verify it independently. Objective data are considered factual and can be used to track changes over time or compare against established norms. While critical for patient care, it does not reflect the patient’s personal experience or perception.

B. Respiratory rate is also objective data because it can be counted and observed. It provides a concrete measure of physiological function and is not influenced by the patient’s subjective feelings. Objective data like vital signs are crucial for detecting trends, assessing baseline health, and identifying early signs of deterioration.

C. The patient reporting feeling nausea is subjective data, meaning it is based on the patient’s personal experience and cannot be directly measured by the nurse. Subjective data include symptoms such as pain, fatigue, dizziness, anxiety, or nausea. This type of information is essential for understanding the patient’s perception of illness, guiding interventions, and planning individualized care. Without eliciting subjective data through careful interviewing, a nurse might miss symptoms that are not apparent through objective measurements alone.

A. Using a Doppler ultrasound device over the brachial artery. B. Palpating the radial artery while counting beats for 30 seconds. C. Using a stethoscope, auscultate at the second intercostal space, right midclavicular line. D. Using a stethoscope, auscultate at the fifth intercostal space, left midclavicular line.

Correct Answer is D

Explanation

Rationale:

A. Doppler devices are useful for detecting weak pulses, especially in peripheral arteries, but the brachial artery does not provide a direct assessment of the apical heart rate, which reflects actual cardiac contractions at the apex of the heart.

B. Radial pulse measurement can underestimate or miss irregularities such as arrhythmias because it only reflects the peripheral pulse, which may differ from actual cardiac contractions (pulse deficit). Counting for only 30 seconds can also reduce accuracy, particularly in irregular rhythms.

C. The second intercostal space at the right sternal border is the aortic valve auscultation site, not the apex of the heart. This site is used to assess heart sounds like the aortic valve closure, not to measure apical pulse rate.

D. The apical pulse is most accurately measured at the apex of the heart, which is located at the fifth intercostal space at the left midclavicular line. Auscultation here allows direct assessment of ventricular contractions, making it the gold standard for measuring heart rate and rhythm, especially in patients with irregular rhythms or when accurate measurement is critical.

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Which of the following is the correct procedure for measuring an adult's blood pressure using a manual sphygmomanometer?

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