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Biomedical subjects

H J Opitz

Publications and source records attributed to H J Opitz.

At least 19 recordsLinked to original sources
PubMed1979

[Slow cortical evoked potentials after noise exposure].

Human cortical evoked potentials under conditions of stimulation are registrated in the post-stimulatory phase of a five minutes lasting equally masking white noise (90 dB HL). Changes of the evoked potentials during to adaptation, possible analogy with high tone losses after noise representation and the origin of tinnitus are examined. Stimulation was started 3 sec after the off-effect of the noise. For five minutes periodically tone bursts were represented. Each train of stimulation consists of tone bursts of three frequencies: 2 kcs, 4 kcs, 8 kcs. The 0.5 sec lasting tones were separated by pauses of 2 sec. During the experiment stimulation and analysis were controlled by a computer. Changes in latency and amplitudes of the cortical evoked potentials were registered. Changes of the adaption patterns as a function of the poststimulatory time are discussed.

Acoustic Stimulation↗
PubMed1979

[Acoustic evoked potentials in presbycusis].

Investigations concerning presbyacusis indicate that the ageing process of the hearing organ is mostly influenced by changes in the sensory-neural pathways. Psychoacoustic measurements give only reduced information on the peripheral and central part of the hearing organ. To verify changes of transport processes in the hearing organ caused by age we examined different evoked potentials. Occurrence probability of positive wave-complexes, input-output functions of amplitude and latency and particular changes in response pattern are analyzed. The results are controled by a signal-analyzer-system using the classical t-test. Thus we could prove data of three age groups and of sex-differences. Our examination partically confirm morphological and histological data of reduced transport processes in most regions of the auditory pathays.

Acoustic Stimulation↗
PubMed1979

[Changes of tube ventilation after nasal septal reconstruction and turbinotomy (author's transl)].

The influence of endonasal operations on tube dysfunction was examined. Because of rhinomanometric proved reduced ventilation a nasal septal reconstruction, in some patients combined with turbinotomy, was performed. Before the operation and then up to two years after the operation tube function was registrated using tube manometry. Compared with the praeoperative results 12 patients out of 37 showed an improvement in tube function. After the operation 7 out of 28 patients were able to provide active equalization of a negative pressure in the middle ear and thus required the ability for physiological middle ear ventilation. In some cases the optimal tube manometric results were achieved not before the end of the observation period of two years. This investigation leads to the conclusion that in cases of reduced ventilation a nasal septum reconstruction should precede a tympanoplasty in order to improve tube function. An improvement of tube function only by permanent ventilation over a period of 2 years can not be obtained, as could be proved by statistic analysis.

Deglutition↗
PubMed1978

[Effects of contraceptive pills in the field of otorhinolaryngology (author's transl)].

Besides the wellknown alterations of the Eustachian tube there will be discussed the effects of the contraceptive pills on salivarian glands and on inner ear. The influence of the gestagen and estrogen on the regulation mechanism of the above mentioned organs is demonstrated. Especially the erectile tissue of the submandibular and parotic glands and recidiving sudden deafness are discussed.

Adult↗
PubMed1978

[Clinic and therapy of the lingual thyreoid (author's transl)].

A case of a lingual thyreoid without any orthotop thyreoideal tissue is presented. Dystopia of thyreoideal tissue is due to disturbances in the embryological development of the thyreoid gland. The clinical picture, diagnosis and differential diagnosis, therapy and prognosis are discussed in regard of cases of literature.

Choristoma↗
PubMed1978

[The influence of aging on middle ear function (author's transl)].

Aging does not only affect the sensory-neural region of the hearing organ but as well the middle ear and its mechanic acoustic function. To determine changes in friction and elasticity of middle ear function due to growing age impedance audiometric methods were used. Alterations of middle ear impedance correlating with age and sex were proved by tympanometry, compliance measurement, reflex-activity and Eustachian tube function. The audiological results confirm morphological data of the middle ear and prove that the hearing organ may be looked at as a sensitive indicator of human physiological aging process.

Acoustic Impedance Tests↗
PubMed1978

[The problems of simultaneous tympanoplasty and adeno- tonsillectomy (author's transl)].

The effect of adento-tonsillectomy on tube function and middle-ear ventilation was measured by tympanometry and manometry. It was found, that after adenotomy considerable negative pressure values may develop in the middle ear. In about one third of all cases five to six days after operation the tube function was not yet normal again. After tonsillectomy alone only a few of the operated children has slight negative pressure values. Adenotomy and tympanoplasty should not be achieved simultaneously.

Adenoidectomy↗
PubMed1978

[Continuous stapedius reflex registration in low and high intensive levels (author's transl)].

To study the whole dynamic range of the stapedius reflex the intensity of the soundstimulus with fixed frequency is continuously changed from 70 to 115 dB. Thus we get results concerning the real reflex eleciting intensity level. the gradient caused by continuous intensity change and a possible limit of contraction. To investigate time resolution phenomenons the stimulating signal is pulsated in a second trial. We used this method of stapedius reflex registration with 48 normal ears and a group of patients with sensorineural hearing loss. The results and the diagnostic possibilities of this method are discussed.

Acoustic Stimulation↗
PubMed1978

[Effects of contraceptive pills in the field of otolaryngology? (author's transl)].

Besides the wellknown alterations of the Eustachian tube and membrana mucosa nasi there will be discussed the effects of the contraceptive pills on salivarian glands and on inner ear. The influence of gestagen and estrogen on the regulation mechanism of the above mentioned organes is demonstrated. Especially the erectile tissue of the submandibular and parotic glands and recidiving sudden deafness and discussed. To solve the about mentioned problems the interaction of medical statistics with clinical experiences is desirable.

Contraceptives, Oral↗
PubMed1977

[Eustachian tube function and middle ear pressure with adhesive tympanic membrane (author's transl)].

The function of the Eustachian tube and the corresponding middle ear pressure are significant factors in the etiology of adhesive ear drums as well as in the prognosis of a possible tympanoplasty. In 58 patients with adhesive tympanic membrane tubal function and middle ear pressure were determined by means of the air pressure equalization technique respectively by direct punction. Normal or only slightly impaired tubal function as well as the middle ear pressure was found in one third of the cases, whereas in the majority of the patients an impaired tubal function and underpressure in the middle ear was registrated. As a precondition for a successful tympanoplasty the ventilation of the middle ear must be improved in these cases. At present this is achieved by a polyethylene tube inserted in the tympanic membrane during the operation.

Ear Diseases↗
PubMed1977

[Middle ear pressure after rhinoplasty surgery (author's transl)].

Middle ear pressure after rhinoplasty surgery was determined by tympanometry. Measurings were done in 94 patients (total of 177 ears) before the rhinoplasty operation and during the following 6 days respectively in special cases up to three weeks. In 153 ears normal middle ear pressure was found before the operation. After the rhinoplasty in about 2/3 of all cases negative pressure up to 300 mm Ws developed. This negative pressure was equalized in the vast majority of cases (84.3%) after the tamponade was removed. In some cases negative pressure persisted for 6 days after the operation (9.8%); in few cases (5.9%) up to three weeks. In 13 out of 24 patients having negative middle ear pressures together with rhinomanometrically objectified impaired nasal ventilation rhinoplasty led to normal middle ear pressure. Reasons for the development of negative pressures in the middle ear are discussed. The results of the investigations lead to consequences concerning tympanoplasty in connection with rhinoplasty operations. Rhinoplasty and tympanoplasty should not be performed on the same day--there should be an intervall of 4--6 days between these operations. Negative pressure in the middle ear in cases of impaired nasal ventilation can be improved by rhinoplasty.

Airway Obstruction↗
PubMed1977

[Mucoserotympanon in adults (author's transl)].

In a great number of adults we investigated anamnesis, etiology, symptomatic, age and sex distribution and quantity of seromucotympanon. Tympanometry is represented as the final method for diagnosis and control. Moment and application of conservative and operative therapy are discussed.

Adult↗
PubMed1976

[Muco-serous otitis media- a frequently missed disease of the middle ear (author's transl)].

Muco-serous otitis media (muco-serotympanon) is one of the most frequent otological diseases not only among children but increasingly also in the adult age group. In addition to microscopic otoscopy tympanometry is most relevant for diagnosis. Tympanometry is based on measurement of acoustic resistance at the level of the tympanic membrane. In cases of muco-serous otitis very characteristic types of tympanometric curves are obtained. Paracenlastic tube through the tympanic membrane are recommended for therapy.

Age Factors↗
PubMed1975

[Postoperative estimation of stapes- and tympanoplastics by pressure evoked threshold shift (author's transl)].

Postoperative middle ear function (tympano-and stapesplastics) is discussed by threshold shift caused by pressure evoked dislocation of the middle ear transmission system (tympano audiometry). The hearing ability in correlation with the tympanogram und tympano-audiogram of special cases out of a total of 91 patients is shown. Different types of tympano-and stapes plastics are discussed.

Audiometry↗