How is the appropriate C-collar size measured?

How is the appropriate C-collar size measured?

• A. From bottom of chin to top of shoulder
• B. From ear lobe to shoulder
• C. From nose to sternum
• D. From jawline to clavicle

Answer: (A)

Sizing a C-collar is about matching its length to the neck, so it immobilizes the cervical spine from under the chin down to the upper chest without blocking the airway. Measuring from the bottom of the chin to the top of the shoulder gives you the appropriate neck length to cover the mandible area down toward the clavicles, ensuring the collar spans the key immobilization zone. This position prevents gaps that could allow movement at the cervical spine while staying clear of the airway and trachea. The other landmarks don’t consistently reflect the needed neck-to-clavicle distance, so they’re not used for sizing.

Sizing a C-collar is about matching its length to the neck, so it immobilizes the cervical spine from under the chin down to the upper chest without blocking the airway. Measuring from the bottom of the chin to the top of the shoulder gives you the appropriate neck length to cover the mandible area down toward the clavicles, ensuring the collar spans the key immobilization zone. This position prevents gaps that could allow movement at the cervical spine while staying clear of the airway and trachea. The other landmarks don’t consistently reflect the needed neck-to-clavicle distance, so they’re not used for sizing.