A laryngeal pacemaker for inspiration-controlled, direct electrical stimulation of the denervated posterior cricoarytenoid muscle in sheep

Bilateral recurrent nerve palsies were induced in four sheep and unilateral nerve palsy in one sheep. Vocal cord abductions were achieved by direct electrical stimulation of the posterior cricoarytenoid muscles (PCMs). By means of the diaphragmatic myogram, respiratory synchronous activation of the...

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Published in:European archives of oto-rhino-laryngology 1991, Vol.248 (8), p.445-448
Main Authors: ZRUNEK, M, BIGENZAHN, W, MAYR, W, UNGER, E, FELDNER-BUSZTIN, H
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Diseases of the upper aerodigestive tract
Electric Stimulation Therapy - instrumentation
Electromyography
Ent and stomatology
Female
Glottis - physiopathology
Laryngeal Muscles - innervation
Laryngeal Muscles - physiopathology
Medical sciences
Paralysis - physiopathology
Prostheses and Implants
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Recurrent Laryngeal Nerve - physiopathology
Respiration
Sheep
Vocal Cords - physiopathology
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Summary:Bilateral recurrent nerve palsies were induced in four sheep and unilateral nerve palsy in one sheep. Vocal cord abductions were achieved by direct electrical stimulation of the posterior cricoarytenoid muscles (PCMs). By means of the diaphragmatic myogram, respiratory synchronous activation of the glottis opening musculature was shown possible. In all cases an adequate glottis opening for respiratory function was achieved during a maximum period of stimulation of 5-8 h in each animal. Abductor movements of the vocal cords were documented with video laryngoscopy. Using digital image processing, the areas of the open glottis were measured at rest and during bilateral direct electrical stimulation of the PCMs.
ISSN:0937-4477
1434-4726
DOI:10.1007/BF00627631