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At least 1,027 records · Page 57Linked to original sources
PubMed1988

High-frequency audiometric changes after stapedectomy.

It is possible that, when the labyrinth is opened in stapedectomy, some form of alteration may occur within it, even if it is not detected postoperatively by routine audiometry. Injuries against the inner ear usually impair the hearing at the highest frequencies. We can assess bone-conduction hearing up to 20 kHz by means of a high-frequency audiometer. Twenty-five patients were examined with conventional and high-frequency audiometry (HFA) before and after successful stapedectomy. Conventional audiometry showed a good postoperative improvement in the low and middle frequencies. HFA showed a lowering of the auditory thresholds above 8 kHz in 20 patients (83.4%), which was not evident with conventional audiometry because it occurred above its upper frequency limit. HFA is a very valuable means of assessing the results of ear surgery, and can be used to compare different surgical techniques.

Adult↗
PubMed1993

Iatrogenic diseases in the surgery of the ear.

We made a retrospective study of 419 cases, who had undergone otological surgery for different reasons. In 55 of them we judged, that the pathology, may have been due to the previous surgery carried out in different hospitals. The disease encountered may have been iatrogenic. We have proceeded analyse of the probable cause and to suggest some techniques for dealing with the problem. We have also suggested criteria for the surgery and for the prevention of this occurrence.

Cholesteatoma↗
PubMed1997

Stapedius tendon reconstruction during stapedotomy: technique and results.

During surgery for otosclerosis, it is common for the surgeon to cut the stapedius tendon. Even without reconstruction of the tendon, the results of this kind of surgery are particularly satisfactory. The stapedial reflex is more important for improving intelligibility of speech in the presence of background noise than for protection against hazardous levels of noise. An intact stapedial reflex improves ones ability to follow speech in the presence of background noise. This report will present a technique to reconstruct the stapedius tendon, along with the results obtained when adding this procedure to stapedotomy surgery.

Aged↗
PubMedDate not supplied

[Historical analysis of otosclerosis surgery].

In the present work main surgical techniques used along the history to solve hypoacusis caused by otosclerosis (opening of the timpani box internal wall, < >, puncture of cephalorachidium liquid, etc.) are studied. Those which have been more spread due to their results are analyzed in more depth (fenestration of the horizontal semicircular ductus, stapes mobilization and stapedectomy).

History, 16th Century↗
PubMed1988

The surgical concept for otosclerosis.

The aggregate results of the stapedectomy operation for hearing improvement are highly satisfactory in the short and long term when carried out by an experienced and skilled surgeon, using a variety of techniques in carefully selected candidates. An initial bone-air gap of 10 dB or less is achieved in 80-90% of patients. The outcome of stapedectomy is dependent on the patient's level of sensorineural reserve which is age dependent, and on the limitations imposed by stapedial footplate pathology. The advantages of various types of piston prostheses for reconstruction have become increasingly clear. The infrequent complications of immediate and delayed sensorineural losses with impaired speech discrimination are certain to be reduced further in incidence by the increasing adoption of small fenestra techniques with piston prostheses and tissue seals. There is a definite need for fully informative statistical methods in reporting the results of surgery for hearing improvement if further advances are to be made.

Adult↗
PubMed1997

[3 cases of post-stapedectomy labyrinthine fistula].

Three cases are presented of labyrinthine fistula which suddenly arose in patients who had undergone stapedectomy interposing a vein graft from the back of the hand. These patients had all enjoyed 12-15 years apparently problem free period before the fistula occurred. In all three cases the fistula was accompanied by objective dizziness and varying degrees of sensorineural or mixed hearing loss. The patients underwent revision surgery which identified the fistula and the endolymph oozing out of the graft from the previously installed prosthesis. The authors present the cases, describe how the symptoms arose and the results obtained with revision surgery. Finally, they discuss the need to first perform stapedotomy with a platinar hole; they indicate that the number of cases of total or partial stapedectomy should be limited only to those cases characterized by anatomical variations and/or whenever complications arise during surgery.

Audiometry, Pure-Tone↗
PubMed1993

Effect of changes in mass on middle ear function.

Vibrating systems such as the middle ear are affected by changes in mass. After disease or ear surgery, significant changes in mass may contribute positively or negatively to the postoperative hearing threshold. This article describes experiments in 15 human temporal bones of the addition or reduction of mass on the middle ear transfer function. Measurement of stapes and umbo vibration was performed using a Laser Doppler Vibrometer before and after the addition of different masses at several sites on the tympanic membrane (TM) and ossicular chain. The input was 61 pure tones swept from 147 to 19433 Hz at 80 dB SPL. The addition of mass onto the TM produced varying detrimental effects on sound transmission, depending on the location and amount of mass. The insertion of ventilation tubes, weighing 12 to 17 mg each, produced losses at 1.5 to 5.0 kHz compared with tympanotomy alone. Addition of mass to the umbo and malleus head produced a loss at mid and high frequencies, whereas addition of mass on the incus long process and stapes also produced a high-frequency decrease in stapes displacement. Reduction of TM mass by removal of the epithelium produced an increase, especially at 2.0 to 4.0 kHz.

Adult↗