When checking a client's peripheral pulses, the practical nurse (PN) is unable to palpate the dorsalis pedis pulse. Which follow- up action should the PN take?

Rationale:

A. Clavicle: The clavicle is a bony structure that does not overlie lung tissue, so placing the stethoscope here would not allow auscultation of lung sounds. It is important to position the stethoscope over areas where airflow can be heard clearly.

B. Sternum: The sternum is also a central bony structure and does not provide access to lung fields. Auscultation over the sternum would mainly transmit cardiac sounds, not lung sounds, limiting the assessment of pulmonary function.

C. Lung apex: The apex of the lung, located just above the clavicles, is the correct starting point for auscultation. Beginning at the apex allows the PN to assess airflow in the upper lung fields first and then move systematically downward and posteriorly to compare lung sounds bilaterally, ensuring a thorough respiratory assessment.

D. Aortic site: The aortic site refers to a cardiac auscultation landmark, not a pulmonary field. Placing the stethoscope here is used to assess heart sounds, specifically the aortic valve area, and would not provide reliable information about lung function.

Rationale:

A. Position the client on the left side and reassess: Placing the client in the left lateral decubitus position shifts the heart closer to the chest wall, making the PMI easier to palpate, especially in older adults or clients with a thick chest wall. This maneuver is a standard initial approach to improve assessment accuracy before concluding that the apical site is non-palpable.

B. Document the lack of an apical pulse in the medical record: Recording a missing apical impulse without further assessment is premature. The inability to palpate the PMI in the supine position can be influenced by positioning or body habitus, additional assessment techniques should be attempted first.

C. Assess the client for signs of diminished cardiac output: While important for overall cardiac assessment, evaluating for symptoms such as hypotension, fatigue, or altered mentation does not address the immediate issue of locating the PMI. This action is supportive but not the priority initial step.

D. Count the pulse rate and volume at the radial site: Measuring the radial pulse provides information on peripheral perfusion but does not substitute for assessing the apical impulse, which is critical for detecting dysrhythmias or confirming heart rate and rhythm, particularly in a bedfast client.