anatomy and physiology mcqs

Question #591

The cricoid cartilage



The cricoid cartilage is the only complete ring of hyaline cartilage in the human body – it is not a bone! It can be divided into two distinct regions: the thick posterior lamina and the thin anterior arch.

It lies at the level of C6 and articulates on its posterior lamina with the arytenoids and the inferior cornu of the thyroid cartilage.

Although the lobes of the thyroid gland lie over the thyroid cartilage the isthmus lies inferior to the cricoid cartilage.

Pressure is often applied on the cricoid cartilage during intubation in the hope of collapsing the oesophagus and preventing regurgitation from the stomach. There is some evidence that this common practice that has been in use for over 50 years might not actually compress the oesophagus at all!

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