查看文章

The purpose of this study was to measure the angle and depth at which the vocal folds are accessed via transcutaneous injection through two different approaches through the cricothyroid membrane.

Twenty-five cadavers preserved with formalin were studied. The larynges were bisected through the thyroid notch, and the skin and soft tissue were removed. A 27-gauge needle was inserted through the cricothyroid membrane, once from just inferior to the thyroid cartilage and once from just superior to the cricoid cartilage, and advanced to the midpoint of the musculomembranous vocal fold (determined as the halfway point from anterior commissure to vocal process), immediately lateral to the vocalis muscle without penetrating the epithelium. The angle of approach was determined after taking multiple measurements with a Castroviejo caliper. The depth of the needle was measured.

Ten male …