What is accessory muscle use

All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use for details see Privacy Policy and Legal Notice. Oxford Reference. Publications Pages Publications Pages. Recently viewed 0 Save Search. Your current browser may not support copying via this button. Subscriber sign in You could not be signed in, please check and try again.

Username Please enter your Username. Password Please enter your Password. A normal person is comfortable in any position. Orthopnoea : Short of breath in supine position, gets some relief by sitting or standing up. Platypnea : Short of breath in erect position, better in supine position. Normal The diaphragm is the dominant muscle. The needed ventilation can be accomplished by breathes per minute. The accessory muscles are not in use with quiet respiration. Patient appears comfortable and the rhythm of respiration close to regular.

The breathing is involuntary. Abnormal Person appears uncomfortable. Breathing seems voluntary. Accessory muscles are in use, expiratory muscles are active and expiration is not passive any more.

The degree of negative pleural pressure is high. Crackles are known as fine or coarse and are also known as rales. Intercostal retractions are a sign of labored breathing. Sonorous rhonchi - a lower pitched wheeze; snoring or moaning adventitious breath sound. Stridor is caused by obstruction of the upper airway.