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Question 1
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Which of the following statements about the cricoid cartilage is true?
Your Answer: A force of 4 newtons must be applied to the cricoid cartilage to control regurgitation
Correct Answer: The lower border is attached to the first tracheal ring
Explanation:The cricoid cartilage is a hyaline cartilage ring surrounding the trachea. It provides support for key phonation muscles.
The inferior border of the cricoid cartilage is attached to the thyroid cartilage and the inferior border is attached to the first tracheal ring through the cricotracheal ligament.
Application of pressure to the cricoid cartilage to reduce risk of aspiration of gastric contents (Sellick manoeuvre) does not stop tracheal aspiration and cannot stop regurgitation into the oesophagus.
A force of 44 newtons to the cricoid cartilage is needed to control regurgitation.
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This question is part of the following fields:
- Antomy
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