puncture) administration of local anaesthesia has been reported as safe, effective and well accepted by patients for bronchoscopy (18,19).
Lower range singing is marked by more thyroarytenoid muscle (TA) activity and lower subglottic pressure, while higher range singing in female classical production and male falsetto involves a more active cricothyroid
muscle (CT) and generally higher subglottic pressure.
(3,4) As the recurrent laryngeal nerve enters the larynx at the level of the piriform sinus at the cricothyroid
joint, a high endotracheal tube cuff pressure can cause a direct crush injury to the nerve, pinning it against the thyroid cartilage.
In patients with cricothyroid
membrane injury, cut ends were sutured and the damaged cartilage structures were approximated with 3-0 Prolene.
A 20-year-old man with Morquio syndrome (Type IV mucopolysaccharidosis) had had a tracheostomy only possible via the cricothyroid
membrane to bypass obstruction at the laryngeal inlet caused by infiltration of glycosaminoglycan.
versus head voice dominant (cricothyroid
dominant) production; straight
Dissection along the nerve as it coursed through the tracheoesophageal groove toward the cricothyroid
membrane allowed for the division of the Berry ligament and release of the lobe.
Therefore, an alternative airway management plan like suitable size LMA, stylet, bougie, high frequency jet ventilation, cricothyroid
cannula and preparation for tracheostomy should be ready beforehand.
space measured 0.86 cm, with the thyroid gland over this space (Figure 2).
Like other muscles innervated by cranial nerves, the intrinsic laryngeal muscles, for example, the thyroarytenoid that comprises the vocal folds, as well as the muscles that adduct (interarytenoid and lateral cricoarytenoid), abduct (posterior cricoarytenoid), and lengthen the vocal folds (cricothyroid
), are composed of muscle fibers that differ from most abdominal and limb muscle.
(9) The weak point of the subglottic area is its proximity to the cricothyroid
membrane, which is perforated by blood vessels and lymphatic channels (the cricothyroid
On exploration multiple blood clots were found and one large clot 4x3 cms was found compressing the trachea in cricothyroid
area, blood clots were removed, hemostasis was achieved, drain was placed and wound closed.