The risk of the 25 gauge needle breaking during injection through the
cricothyroid membrane is reduced by withdrawing the needle after initial injection, before the patient coughs.
(12) Although injury to the latter can result in abnormal
cricothyroid function, frank vocal fold immobility is unlikely, as seen in our case.
A small horizontal midline skin incision was made at the level of the
cricothyroid space.
A needle inserted into the trachea via the
cricothyroid membrane permitted successful intermittent jet ventilation with oxygen.
But what real benefit comes from knowing the difference between the
cricothyroid and thyroarytenoid muscles?
It then ascends to enter the larynx near the
cricothyroid joint or through the lower horn of the thyroid cartilage, through the inferior constrictor, and into the apex of the piriform sinus (19, 22).
The function of the
cricothyroid muscle is defined in its name: it pulls the thyroid cartilage toward the cricoid cartilage.
(10) Finally, research shows a greater ratio of activity by the thyroarytenoid muscle relative to the activity of the
cricothyroid muscle occurs during and after using the SOVTs.
The superior glands are most commonly located at the level of the
cricothyroid joint, approximately 1 cm above the intersection of the recurrent laryngeal nerve (RLN) and the inferior thyroid artery in a plane deep to the RLN.
It is important to note that the recurrent laryngeal nerve crosses the K-J space as it enters inferolaterally to the
cricothyroid joint, and therefore careful dissection in this area is necessary to avoid nerve injury (figure, B).
Occasionally, the extralaryngeal muscles and the
cricothyroid muscles are injected to improve the tremor.
It may cause a forward position of the cricoid [cartilage] in relation to the thyroid [cartilage], thereby stretching the
cricothyroid muscle.