
The systematic review analyzed 634 patients undergoing transnasal, transoral, or transcutaneous injection laryngoplasty under local anesthesia. All techniques showed similar vocal improvements, with a mean phonation time increase of 4.57 ± 2.3 seconds. The procedure is safe, effective, and comparable to techniques performed under general anesthesia, offering a reliable outpatient treatment for unilateral vocal fold paralysis.
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