Stridor and wheezing are two terms for different breathing sounds that are often used synonymously although there is a difference. Wheezing refers to the high-pitched or whistling sound, which is most prominent when breathing out (expiration). A wheeze is usually heard clearly upon auscultation (use of a stethoscope) although at times it may be audible, especially to the patient, without any need for a stethoscope. A stridor is also high pitched but ‘rough’ sound sometimes described as crowing. It easily audible without the use of a stethoscope (auscultation) and while it is present when breathing in (inspiration) or out (expiration), it is usually more prominent on inspiration.
continue reading Causes of Stridor and Wheeze (Breathing Sounds)
