CPT® Code 21685

The procedure described by CPT® Code 21685 refers to a hyoid myotomy and suspension, a surgical intervention primarily aimed at treating obstructive sleep apnea syndrome. This condition is characterized by repeated episodes of airway obstruction during sleep, which can lead to significant health issues. The hyoid myotomy and suspension procedure works by enlarging the airway located behind the tongue, known as the retrolingual space, as well as the lower pharynx, referred to as the hypopharyngeal area. The surgical approach begins with an incision made just above the hyoid bone, allowing the surgeon to create skin flaps that expose the underlying subplatysmal fat and muscles. This exposure is crucial for the subsequent steps of the procedure, which involve partial resection of the subplatysmal fat and careful dissection to access the thyroid cartilage. The technique includes the use of a needle and wire to manipulate the hyoid bone, ultimately advancing it to open the airway and alleviate the obstruction. The procedure concludes with the placement of a drain and closure of the incision layers, ensuring proper healing and recovery.