Prospective evaluation of the clinical utility of laryngeal electromyography.
OBJECTIVE
To prospectively evaluate the clinical utility of laryngeal electromyography (LEMG) STUDY DESIGN: Prospective observational study.


METHODS
The study involved 50 consecutive patients referred for LEMG. Laryngologists initially indicated diagnoses and treatment plans under the assumption of no access to LEMG. Patients then underwent LEMG by blinded examiners. LEMG results were reviewed by each patient's laryngologist. Diagnoses and treatment plans were either maintained or altered based on the LEMG results.


RESULTS
The diagnosis changed 10% (5/50) of the time and treatment plans were altered 36% (18/50) of the time based on information provided by LEMG. Observational periods were eliminated in 13/50 patients based on LEMG, moving them to permanent treatment. LEMG allowed the differentiation between joint fixation and bilateral paralysis in three patients. Previously unrecognized superior laryngeal neuropathies were identified in three patients.


CONCLUSIONS
Laryngeal electromyography often provides clinically useful information that typically leads to a more accurate diagnosis and a more appropriate, expedited treatment plan.


METHODS
2b.
University of Pittsburgh Voice Center, Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, U.S.A.
John W
JW
Ingle
VyVy N
VN
Young
Libby J
LJ
Smith
Micheal C
MC
Munin
Clark A
CA
Rosen
D003937:Diagnosis, Differential; D004576:Electromyography / Q000706:statistics & numerical data*; D005500:Follow-Up Studies; D006801:Humans; D007830:Larynx / Q000503:physiopathology*; D011379:Prognosis; D011446:Prospective Studies; D012009:Recurrent Laryngeal Nerve / Q000503:physiopathology*; D015203:Reproducibility of Results; D014826:Vocal Cord Paralysis / Q000175:diagnosis* / Q000469:parasitology / Q000503:physiopathology
Laryngeal electromyography; bilateral vocal fold paralysis; cricoarytenoid joint; laryngeal stenosis; medial arytenoidectomy; superior laryngeal nerve; transverse cordotomy; vocal fold paralysis