Author/Editor		Gros, Anton
Title		"Smiselnost ohranitve stremenčeve mišice pri kirurškem zdravljenju otoskleroze"
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		1998
Volume		str. 95
Language		slo
Abstract		Background. Several different surgical methods for the treatment of otosclerosisrelated conductive deafness have been reported. Surgical procedures were aimed at re-establishing as far as possible normal functioning of the conductive system of the middle ear. Every surgical technique established so far requires severance of the stapedial muscle tendon. This disables the muscle which is - in combination with the tympanic tensor muscle - responsible for changing impedance of the whole conductive system of the middle ear. In the case of strong acoustic stimulation, the preserved stapedial muscle and its re-established function increase the impedance of middle ear conductive system, thus protecting the inner ear from acoustic damage. Our study was aimed to show whether it makes sense that in the surgical treatment of otosclerosis-related conductive deafness the stapedial muscle remains preserved, whether it responds to strong auditory stimuli by contraction, and finally, whether in patients with the muscle preserved the threshold of discomfort related to a strong auditory signal is increased. Patients and Methods. Our study was carried out on 67 patients (20 males and 47 females) with the evidence of conductive or combined deafness in tone threshold audiograms, who were to undergo surgery for suspected otosclerosis-related conductive deafness. The prerequisite for inclusion into the study was tympanoscopic evidence of otosclerosis which was in many cases also confirmed by histological examination of a stapedial tissue sample. In group A (34 patients) the stapedial muscle was intraoperatively preserved as follows: the stapedial suprastructure with the preserved muscle endon was transpositioned onto the longer arm of the incus and secured with a tantalum wire loop.(Abstract truncated at 2000 characters.)
Descriptors		OTOSCLEROSIS STAPES HEARING LOSS, CONDUCTIVE ACOUSTIC IMPEDANCE TESTS STAPES SURGERY AUDIOMETRY AUDITORY THRESHOLD