[Posterior semicircular canal occlusion with microwave assisted technique in guinea pigs].
OBJECTIVE
To study the effectiveness of posterior semicircular canal occlusion with microwave assisted technique.


METHODS
Posterior semicircular canal occlusion with microwave assisted technique was performed in 20 guinea pigs. Electronystagmography (ENG) and auditory brainstem response (ABR) were recorded preoperatively and postoperatively. Morphological changes were observed under light microscopy.


RESULTS
Left and right nystagmus returned symmetrical on the 3rd postoperative day. Two ears showed normal symmetrical nystagmus to icc-water stimulation on preoperation and the 30th postoperative day. There were no significant changes of the thresholds of ABR before and after surgery. Histopathological findings revealed that posterior semicircular canal was completely occluded, and that Organ of Corti and crista ampullaris were normal.


CONCLUSIONS
Posterior semicircular occlusion with microwave technique is suggested as an effective and safe treatment for the benign paroxysmal positional vertigo.
Liu
J
J
Department of Otolaryngology, First Affiliated Hospital, Jinzhou Medical College, Jinzhou 121001.
Gu
J
J
Yin
S
S
Sun
L
L
D000818:Animals; D004584:Electronystagmography; D016057:Evoked Potentials, Auditory, Brain Stem; D006168:Guinea Pigs; D007759:Labyrinth Diseases / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008872:Microwaves / Q000627:therapeutic use*; D012665:Semicircular Canals / Q000601:surgery*; D014717:Vertigo / Q000601:surgery