This site is intended for healthcare professionals
Login | Register (NOW FREE)

Medical search

stridor

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

Incomplete obstruction to airflow within the upper respiratory tract leads to turbulence and the intense musical sound of stridor. It may be difficult to distinguish from a monophonic wheeze.

The larynx is particularly predisposed to obstruction because it is the only part of the respiratory tract that has an entire circle of non-compliant cartilage - the cricoid cartilage. In addition, the subglottis - the area just below the vocal cords - is also the narrowest part of the upper respiratory tract. Hence, pathology in the larynx, e.g. inflammation or a foreign body, may lead to airflow obstruction.

Stridor may be of three types according to the location of the airway obstruction:

  • inspirational: most common; obstruction at, or above, the level of the cords
  • biphasic: inspirational and expirational; obstruction in the subglottis or trachea
  • expirational - obstruction in the small airways, e.g. asthma

With advancing obstruction, inspirational stridor may develop into the biphasic form.

Links:

The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.