Auscultation

Definition

Auscultation is the systematic process of listening to sounds produced within the body, especially the heart, lungs, vasculature, and abdomen, with a stethoscope. It is the fourth step of physical examination, except in abdominal assessment where it is second (after inspection).

Stethoscope Use

• Diaphragm: High-pitched sounds (breath, bowel, normal heart sounds, S1/S2).
• Bell: Low-pitched sounds (S3, S4, bruits, extra murmurs).

Clinical Applications

Heart: listen over aortic, pulmonic, Erb's point, tricuspid, and mitral areas. Lungs: auscultate posterior, lateral, and anterior chest, comparing side-to-side. Abdomen: listen all four quadrants for at least 1 minute each before deciding bowel sounds are absent (5 minutes for confirmation). Vessels: listen for bruits over carotids, abdominal aorta, and renal arteries.

Nursing Considerations

Warm the diaphragm, ensure a quiet environment, and place the stethoscope directly on skin, never over gown. Document location, pitch, quality, and timing of any abnormal sounds.

NCLEX Relevance

Remember: For the abdomen, the order changes to Inspect, Auscultate, Percuss, Palpate.