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Biomedical subjects

T Frank

Publications and source records attributed to T Frank.

At least 91 records · Page 5Linked to original sources
PubMed1978

Acoustic neurinoma in a child: a case study.

This case study reports the audiological and surgical findings for a nine-year-old boy with an acoustic neurinoma. He was suspected of having a right ear retrocochlear lesion following three audiological evaluations in four years. The initial evaluation indicated normal hearing ability. The second and third evaluations indicated a progressive right ear hearing loss, characterized by reduced word discrimination ability and absent acoustic reflexes. The patient had a 5 cm acoustic neurinoma compressing and adherent to the brain stem. The tumor was successfully removed following three operations employing an otoneurological and neurosurgical team approach through a retromastoid exposure. Postoperative recovery was uneventful. Facial nerve function was not disturbed, however attempts to preserve hearing on the involved side were not successful.

Child↗
PubMed1978

Ultrasonic evaluation of "silent regions" in the thyroid scintiscan.

35 patients with scintigraphically silent thyroid regions without palpable cold nodules were further evaluated by ultrasonography. In 33 cases the sonographic diagnosis was confirmed by other examinations or the clinical course. 2 cases were misinterpreted right at the beginning of our series. The use of ultrasonography in evaluating silent thyroid regions in the totally decompensated autonomous adenoma, in unilateral thyroid aplasia, thyroiditis and hyperthyroidism is shown to be a reliable and valuable supplement to the clinical and radioisotopic evaluation procedures. When differentiating the totally decompensated autonomous adenoma from unilateral thyroid aplasia a stimulation test need not be performed in most cases. Suspected thyroiditis can be confirmed in a simple way. Being a non-invasive evaluation procedure, ultrasonography should be used before performing a needle biopsy.

Congenital Abnormalities↗
PubMed1978

[The vessels of the retropancreatic space in grey-scale-ultrasound. A contribution to the topography of the pancreas (author's transl)].

Normal pancreatic parenchyma and retropancreatic vessels can be well visualized and differentiated by grey-scale-tomography. The posterior border of the head and body of the pancreas can be defined better with the grey-scale-technique than with other ultra-sound-techniques by visualization of the retropancreatic vessels. For this purpose the venous system (portal vein, splenic vein and superior mesenteric vein) is more important than the arteries because of their closer topographic relationship to head and body of the pancreas. Identification and separation of those veins from other vascular structures is easily possible because of their constantly reliable topography and typical configuration on transverse section. The spleno-porto-vascular bundle--resembling a tadpole--should be demonstrated well enough to avoid the occasional confusion with the pancreas itself.

Humans↗
PubMed1978

[Possibilities of errors in the sonographic diagnosis of renal tumours (author's transl)].

Artefacts or not completely visualised renal contours can lead to the erroneous diagnosis "renal tumour". This false diagnosis is mostly avoidable by means of accurate examination technique. Further radiological examination will be required only in exceptional cases. Incompletely visualisable parenchymal ridges with socalled incomplete multiple kidneys frequently create the impression of an intrarenal tumour and indicate the need for further clarification. There is a relatively high degree of uncertainty in intrarenal space-occupying processes below 2.5 cm diameter, as far as structural analysis is concerned. In such cases, provided a sufficiently strong clinical and roentgenological suspicion is sustained, angiography and, if necessary, exposure, should be recommended on a rather liberal basis.

Congenital Abnormalities↗
PubMed1978

[Sonographic renal diagnosis in paediatrics (author's transl)].

Sonography is a method without risk but of high diagnostic value. Hence, it is extremely well suited for paediatric examination. In our opinion, this method should rank first among all other examination methods when clarifying inflammatory conditions of kidneys and of the efferent urinary tract, whereas in all other problems sonography continues to rank second behind the urogram. Both examinations together, which account for a diagnostic safety of more than 95%, are employed to decide whether and to what extent other and more invasive and complicated measures will have to be taken.

Abdominal Neoplasms↗
PubMed1978

Relative intelligibility of CID spondees for normal and hearing-impaired listeners.

The relative intelligibility of the 36 CID spondees presented via tape recording was found on Ss with normal hearing, and on Ss with flat and with sloping sensorineural losses (N: 15 in each group). The spondees as a group were found not to be homogeneous in intelligibility for each group and across groups. Ss with a sloping loss identified the spondees at a significantly (p less than 0.05) higher sensation level (SL) compared with the other groups. A list of 14 spondees was derived encompassing relative intelligibility within a 5-db range for clinical use with such Ss.

Adolescent↗
PubMed1977

[Ultrasound for differentiated carcinoma of the thyroid, autonomous adenoma and thyroiditis (author's transl)].

The article deals with a number of thyroid abnormalities which produce similar sonographic patterns, characterised by a paucity of echos of low amplitude. It concerns three more or less circumscribed changes (differentiated carcinoma of the thyroid, autonomous adenoma and focal thyroiditis) and two diffuse thyroid conditions (sub-acute and lymphocytic diffuse thyroiditis, hyperthyroidism). Carcinoma of the thyroid is of particular interest. The distinguishing features and differential diagnosis are discussed.

Diagnosis, Differential↗
PubMed1976

Yes-no test for nonorganic hearing loss.

The Yes-No Test is a procedure that can be used in the diagnosis of nonorganic hearing loss in children. The test employs a pure tone audiometric technique in which the child is instructed to say "yes" when he hears the tone and "no" when he does not hear the tone. This article describes clinical findings in three cases involving nonorganic hearing loss in which the Yes-No Test was instrumental in determining the true organic hearing thresholds.

Adolescent↗
PubMed1976

[The scope of ultra sound in the diagnosis of thyroid disease (author's transl)].

Between 28, 9, 73 and 30, 9, 75, we examined the thyroid glands of 315 patients by means of ultra sound. In 166 patients the ultra sound findings could be compared with other methods of examination, particularly surgery, or with the subsequent clinical course. The value of ultra sould is stressed particularly in the differential diagnosis of solitary "cold" scintigraphic nodules and for wider routine use. The technique and value of this method are described.

Adenoma↗
PubMedDate not supplied

Clinical significance of the relative intelligibility of pictorially represented spondee words.

The relative intelligibility of 20 pictorially represented spondees were found for 40 normal hearing children between 3 1/2 and 5 1/2 years old. The range of the level of relative intelligibility was 5.3 dB. A spondee threshold (ST) was obtained for 60 different children between 3 1/2 and 5 1/2 years old in a 2 dB (N = 30) or a 5 dB step (N = 30) method for three sets of pictorially represented spondees (six pictures per set) having low, mid, and high levels of relative intelligibility. The ST's using a 2- or 5-dB step were not significantly different regardless of picture set level of relative intelligibility. ST's obtained with the picture sets having different levels of relative intelligibility were significantly different from each other. It was suggested that clinical consideration be given to the use of pictorially represented spondees which were identified at the lowest levels of relative intelligibility to increase the efficiency and precision of the ST measurement in children.

Child, Preschool↗
PubMedDate not supplied

Attenuation characteristics of hearing aid earmolds.

The purpose of this study was to determine the attenuation characteristics of several hearing aid earmolds. Six earmolds and an E-A-R earplug modified to act as an earmold were evaluated according to the standard procedure. The six earmolds consisted of two types (shell and skeleton) having different materials (Lucite and vinylflex) and different styles (normal and tragus lock). The traditional earmolds provided approximately 17 dB less attenuation as compared with the E-A-R earmolds. The attenuation provided by the traditional earmolds was not influenced by the type, material, or style. The traditional earmolds had a noise reduction rating of less than 3.3 dB, whereas the noise reduction rating for the E-A-R earmolds was greater than 18.2 dB. Traditional earmolds should not be considered as a substitute for a hearing protection device. However, E-A-R earmolds could be used as a substitute for a hearing protection device provided the level of the noise minus the noise reduction rating would be acceptable.

Adult↗
PubMedDate not supplied

The Beltone 5b artificial mastoid: theoretical characteristics and performance measurements.

Early versions of the Beltone artificial mastoid system were designated as model 5A. Later versions were designated as model 5B due to design modifications which changed the mechanical impedance parameters. The theoretical impedance characteristics of the 5B were considerably lower than for a comparison 5A. Compared with a B & K model 4930 (new pad) artificial mastoid, the 5B had a lower impedance (closer to ANSI values) from 500 to 2000 Hz and a slightly higher impedance at 250, 3000, and 4000 Hz. Discrete and continuous output voltage measurements with a constant input revealed that the performance of the 5B was also different compared with a 5A and the B & K model 4930 for different vibrator types. Bone conduction thresholds for a Radioear B-70A, B-71, and B-72 vibrator were obtained on 30 trained normal-hearing listeners. Adjusted threshold force levels needed to achieve normal-hearing bone conduction thresholds are presented for calibrating bone vibrators in clinical use with a Beltone 5B artificial mastoid.

Adult↗