![]() Mild wheezing is often limited to the expiratory phase of respiration, while more severe wheezing can be heard throughout the respiratory cycle. Low-pitched wheezes are sometimes called rhonchi. Wheezes can be high-pitched, which is common with asthma, or low- pitched with almost a snoring quality. Airways can be narrowed by a number of causes: the bronchial constriction that accompanies asthma, bronchial inflammation, mucus accumulation or mucous plugs, or tumors. They are most common at the end of inspiration.ġ8 Wheezes Wheezes are continuous sounds caused by air moving through constricted airways. Crackles, which are sometimes called rales, are wet, popping sounds created by air moving through liquid or by collapsed alveoli snapping open on inspiration. Occasionally you might not hear any breath sounds at all over a particular part of the lung this can result from airway obstruction, with collapse of lung tissue (such as pneumothorax)ġ7 Odd sounds Note the quality of the lung sounds and listen carefully for any abnormal sounds, such as crackles or wheezes. However, diminished breath sounds can also be associated with disease. You must train to have selective hearing, to listen for a single sound & then focus on it.ġ6 When its not normal Diminished or hard-to-hear lung sounds are most common with thick chest walls (in either muscular or obese patients), or when the patient is not taking deep breaths. These are subjectively equated to the physical properties of sound waves, frequency, intensity, & harmonics. Sound is perceived according to its pitch, loudness & quality. It should be applied with very light pressure barely making an air tight seal. These include absent breath sound areas, 3rd & 4th heart sounds, fluid filled chest cavity, i.e. It should be applied to the skin of the chest wall with firm pressure.ġ4 Use of the stethoscope The bell- is best suited for low-pitched sounds & murmurs. These include high pitched rales, 1st & 2end heart sounds, some stenosis & regurgitation murmurs. ![]() You should hear breath sounds over all lung tissue, and the quality of the breath sounds should be similar as you listen from side to side.ġ3 Use of the Stethoscope The diaphragm- most suitable for listening to high- pitched sounds & murmurs. Each area should be listened to in both inspiration & exhalation phasesġ2 LIstening Be sure to listen to each full cycle of inspiration and expiration before moving your stethoscope, as just one part of the respiratory cycle might generate abnormal sounds. These sounds need to be defined by when they occur, loudness, wet or dry, associated cough, etc.ġ0 Where do you listen There at least 4 separate areas on both sides of the body, top & bottom, front & back, right & left. You are listening for several types of sounds these may include: Normal breath sounds, decreased or absent breath sounds & abnormal breath sounds. ![]() They should fit well, be comfortable, be air tight & angled slightly forward. The ear piece is frequently the source of a problem if you cannot hear well. The sounds you hear depends on it functioning properly. Presentation on theme: "Breath Sounds and stethoscope"- Presentation transcript:Ĥ The Stethoscope You will all have one, but how is the best way to use it.
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