Detection of ideal reservoir level after laryngectomy using endoilluminator in voice rehabilitation.

OBJECTIVE To assess the diagnostic value of a novel device, the endoilluminator, in patients who can or cannot attain effective speech after application of voice prosthesis. STUDY DESIGN Prospective clinical study. METHODS Thirty-four patients who underwent total laryngectomy and whose insufflation test was positive were included. As a result of efforts to develop an insufflation test that includes a light apparatus, we attained a device that we call an endoilluminator. We found that the area it illuminated when a patient achieved effective speech was a predictive factor for the test result. That is, patients for whom the upper part of the tracheostomy (where the standard tracheoesophageal fistula will be opened) was illuminated were categorized as the positive test group, whereas those for whom the neck skin above this region was illuminated were categorized as the negative test group. RESULTS In 27 of the 34 patients, appropriate localization was determined using the endoilluminator, and these patients achieved effective speech. In the remaining seven patients, localization was inappropriate and they did not achieve effective speech during the first week, first month, or third month postpuncture. In further investigations of these seven patients, a pharyngoesophageal spasm was detected in five, and a pharyngoesophageal stricture was detected in two. CONCLUSION Endoilluminator increases the success rate of the insufflation test by accurately predicting a patient's ability to achieve effective speech after application of voice prosthesis.