Basics Lung Sounds

Introduction


The ideal position for auscultation is to place the patient in a sitting position. If a patient is to remain recumbent, roll the patient from one side to the other to examine the back. If the patient cannot be rolled from side to side, such as in certain ICU settings, auscultation over the anterior chest can be done to yield a more limited examination.
When auscultating, the patient should inhale and exhale through the mouth, deeper than their usual breaths. Auscultation should be performed with the diaphragm of the stethoscope applied directly to the skin, as clothing and other materials can dampen or distort perceived sounds. This should occur symmetrically between the two hemithoraces so that sounds may be compared between sides. Start near the apices and move down in a ladderlike pattern until below the level of the diaphragm is reached or breath sounds are no longer appreciated. This should be performed over the anterior and posterior chest.
lungs examination.
The sounds heard during auscultation can be classified as breath sounds, created by air movement through the airways, and adventitious, or added sounds, which have multiple mechanisms of generation.