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Biomedical subjects

W Bader

Publications and source records attributed to W Bader.

At least 19 recordsLinked to original sources
PubMed1995

[Ultrasound morphologic parameters of female stress incontinence].

AIM: The study compared ultrasound parameters of the lower urinary tract with patients' age, number of previous pregnancies as well as the grade of incontinence. Furthermore, the influence of postural changes was studied. METHOD: Ultrasonographic examination of the vaginal introitus was performed on 222 patients using a 5 MHz scanner. The transducer was inserted along the body axis and a vertical plane was defined. RESULTS: Urinary stress incontinence was found to be associated with the occurrence of cystoceles, the finding of a funnel-like opening of the proximal urethra, an increased retrovesical angle beta, and finally with a descent of the bladder neck. However, there was no significant correlation between urethral length and the grade of stress incontinence. In patients without urinary incontinence, the retrovesical angle as well as the position of the bladder neck were strongly related to parity but did not correlate with the patients' age. There was no significant difference between parameters when the patients were straining in a prone or half-prone position. CONCLUSION: Sonomorphological pelvic floor disorder is based on previous pregnancies and correlates well with urinary stress incontinence.

Adult↗
PubMed1995

[Postpartum ultrasound morphology of the pelvic floor].

METHODS: Introital sonography was performed on 131 patients between the first and 13th day (average 4.2 days) after delivery. 41 non-pregnant nulliparous women without any complaints of urinary incontinence served as controls. Post-partum morphological changes were analysed using a 5-MHz vaginal scanner and correlated with parity and mode of delivery. RESULTS: The occurrence of cystoceles and opening of the proximal urethra were strongly related with parity and mode of delivery being more common in multiparous women after vaginal deliveries than after caesarean sections. In the control group, the urethrovesical angle beta was 96 degrees in rest and 102 degrees when straining. After vaginal deliveries, a significantly larger angle was observed when compared to patients after caesarean section. During straining, the bladder neck shortened from 21.4 mm to 13.1 mm compared to -0.7 mm after vaginal delivery. CONCLUSION: Morphological changes of the lower urinary tract after delivery are common. The sonographic appearance of these changes is almost identical to those observed in patients with urinary stress incontinence.

Adolescent↗
PubMed1994

[Texture analysis: a new method for evaluating ultrasound imaged lesions of the breast].

Echogenicity and echostructure in sonomammography are essential criteria to determine the malignancy of a breast tumor. Looking for a correlation between echostructure of an ultrasound image and its histopathology a texture analysis was performed. Ultrasonic examinations were carried out by means of a 7.5-MHz linear scanner under standardized conditions. 71 mammasonographic findings were documented by video tape, each tumor in 2 dimensions. In a second step 'the region of interest', that means the whole tumor area, was marked and statistically analyzed by a dedicated computer system. The values of 23 first- and second-order statistical texture parameters were compared with the histopathology of the tumor. They include grey level histogram, Fourier analysis and cooccurrence matrix. The most important results were obtained in the histogram analysis. An obvious distinction could be worked out concerning carcinomas, adenomas, mastopathic tumors, and fat necrosis. Except the difference between carcinomas and adenomas this distinction was statistically significant. Fourier analysis and coocurrence matrix significantly separate fibrocystic lesions, fat necrosis, scars, and cystic structures from malignant tumors. Furthermore the maximum value method was used to compare the different parameters with regard to their capability of discriminating benign and malignant tumors. The extreme values of 100% were mostly observed in the case of seromas and scars. A significant difference was found by histological grading of carcinomas, too. Highly differenciated carcinomas show capability of results comparable to those of adenomas. By means of a computer texture analysis program it is possible to find a correlation between echostructure and histopathology of breast tumors.(ABSTRACT TRUNCATED AT 250 WORDS)

Adenoma↗
PubMed1993

[Antibody detection after antepartal rhesus prophylaxis: normal values or sensitization].

Antibody screening tests were performed in 29 unsensitized pregnant women after antepartum Rh immune prophylaxis, using the indirect Coombs test (ICT) and a more sensitive ID-microtyping-system (IDM). With the ICT, anti-D antibodies were detected in 85% for at least 4 weeks and at most 8 weeks after immunisation. The maximum titer was 1:8. With the IDM, 97% showed antibodies against 'D' for at least 4 weeks and at most 11 weeks with a maximum of 1:16. The IDM titer was always 1 to 3 steps more sensitive than the ICT. After postpartum Rh immune prophylaxis, anti-D titers were again positive in many of the patients (ICT: 42%; IDM: 60%). In conclusion, it is nearly always possible to measure antibodies against 'D' after antepartum Rh immune prophylaxis and IDM was superior in comparison to ICT. However, maternal isoimmunisation to the rhesus antigen cannot be excluded for sure and patients have then to be controlled. As isoimmunisation could not be confirmed in any of our patients, postpartum Rh immune prophylaxis has to be administered even after detection of an antibody titer against 'D' after antepartum Rh prophylaxis.

Coombs Test↗
PubMed1992

[Comparative studies of the uterine cervix in pregnancy using palpation and vaginal sonography].

Ultrasonography and manual palpation were used to evaluate the uterine cervix of 71 pregnant women between 14th and 36th week of gestational age. The sonographic length of the uterine cervix was about 4.2 cm according to the relevant cervix palpation (Group I), about 3.2 cm in the moderately shortened cervix (Group II) and about 2.8 cm in the severely shortened cervix (Group III). The distance between the surface of the ectocervix to the urinary bladder corresponded to the cervical palpation showing a constant difference of about 0.5 cm. No difference could be found in the width of the upper cervix. The index was determined as ratio of the sonographically ascertained cervical length and width of the supravaginal cervix. A value of 0.8 or lower describes a cervical incompetence of a higher degree and signifies an unfavourable prognosis. The evaluation of cervical incompetence and the relevance of the sonographically detected opened internal os have not yet been clarified. A hitherto unsolved problem is the dilatation of the cervical canal in case of immature palpatory findings with traumatic anamnesis.

Adult↗
PubMed1990

[Hyperkinetic syndrome following premedication with Thalamonal].

A rare hyperkinetic syndrome in a child after premedication with Thalamonal has been known for some time. The triad: unconsciousness, opisthothonus and conjugate deviation should be considered by surgeon and anesthetist and it looks like the somnolent-ophthalmoplegic-hyperkinetic type of Economo's Encephalitis lethargica. The therapy is simple: 1 ml Biperiden i.v.

Anesthetics↗
PubMed1989

[Lateral osteoma--auditory exostosis or hamartoma?].

An osteoma of the external meatus the size of a hazelnut was found in a 30-year-old man, arising from the bony edge of the external meatus near the tympanomastoid fissure. Histology showed epithelial cysts, trabeculae, blood-forming areas, fat cells, connective tissue and blood vessels. The site of origin and histological findings seem to indicate true hamartoma.

Adult↗