Tracheal rings

Jump to: navigation, search
Tracheal rings
Gray952.png
Ligaments of the larynx. Posterior view. (Rings visiblea at bottom.)
Latin cartilagines tracheales
Gray's subject #237 1086
Dorlands/Elsevier c_12/12217233

WikiDoc Resources for Tracheal rings

Articles

Most recent articles on Tracheal rings

Most cited articles on Tracheal rings

Review articles on Tracheal rings

Articles on Tracheal rings in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Tracheal rings

Images of Tracheal rings

Photos of Tracheal rings

Podcasts & MP3s on Tracheal rings

Videos on Tracheal rings

Evidence Based Medicine

Cochrane Collaboration on Tracheal rings

Bandolier on Tracheal rings

TRIP on Tracheal rings

Clinical Trials

Ongoing Trials on Tracheal rings at Clinical Trials.gov

Trial results on Tracheal rings

Clinical Trials on Tracheal rings at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Tracheal rings

NICE Guidance on Tracheal rings

NHS PRODIGY Guidance

FDA on Tracheal rings

CDC on Tracheal rings

Books

Books on Tracheal rings

News

Tracheal rings in the news

Be alerted to news on Tracheal rings

News trends on Tracheal rings

Commentary

Blogs on Tracheal rings

Definitions

Definitions of Tracheal rings

Patient Resources / Community

Patient resources on Tracheal rings

Discussion groups on Tracheal rings

Patient Handouts on Tracheal rings

Directions to Hospitals Treating Tracheal rings

Risk calculators and risk factors for Tracheal rings

Healthcare Provider Resources

Symptoms of Tracheal rings

Causes & Risk Factors for Tracheal rings

Diagnostic studies for Tracheal rings

Treatment of Tracheal rings

Continuing Medical Education (CME)

CME Programs on Tracheal rings

International

Tracheal rings en Espanol

Tracheal rings en Francais

Business

Tracheal rings in the Marketplace

Patents on Tracheal rings

Experimental / Informatics

List of terms related to Tracheal rings

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]



The cartilages of the trachea (or tracheal rings) vary from sixteen to twenty in number: each forms an imperfect ring, which occupies the anterior two-thirds or so of the circumference of the trachea, being deficient behind, where the tube is completed by fibrous tissue and unstriped muscular fibers.

Middle tracheal cartilages

The cartilages are placed horizontally above each other, separated by narrow intervals.

They measure about 4 mm. in depth and 1 mm. in thickness.

Their outer surfaces are flattened in a vertical direction, but the internal are convex, the cartilages being thicker in the middle than at the margins.

Two or more of the cartilages often unite, partially or completely, and they are sometimes bifurcated at their extremities.

They are highly elastic, but may become calcified in advanced life.

Bronchial cartilages

In the right bronchus the cartilages vary in number from ten to twelve; in the left, from fifteen to twenty.

They are longer and wider than those of the trachea, but have the same shape and arrangement.

First and last tracheal cartilages

The peculiar tracheal cartilages are the first and the last.

The first cartilage is broader than the rest, and often divided at one end; it is connected by the cricotracheal ligament with the lower border of the cricoid cartilage, with which, or with the succeeding cartilage, it is sometimes blended.

The last cartilage is thick and broad in the middle, in consequence of its lower border being prolonged into a triangular hook-shaped process, which curves downward and backward between the two bronchi. It ends on each side in an imperfect ring, which encloses the commencement of the bronchus. The cartilage above the last is somewhat broader than the others at its center.

Additional images

External links



Linked-in.jpg