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Biomedical subjects

W Mauermayer

Publications and source records attributed to W Mauermayer.

At least 19 recordsLinked to original sources
PubMed1985

[Operative complications in transurethral operations: causes and prevention].

Complications resulting from transurethral operations can be classified as intraoperative, directly postoperative and late complications. Specific problems are related to prostatic resection, resection of bladder tumors or lithotripsy of bladder stones. An analysis of these problems is presented based on in the experience in more than 10 000 transurethral operations. Directives are developed to avoid additional intraoperative harm and minimize resulting problems. Methods for correction of iatrogenic complications are explained.

Adenoma↗
PubMed1984

Hereditary autosomal dominant form of bladder diverticula in male patients.

We report on 1 family in which 7 male patients had solitary bladder diverticulum. This family represents an autosomal dominant form of this disease by which only men are affected. Diverticula of the bladder can be classified as congenital (primary) or acquired (secondary). Vesical diverticula are uncommon in children and occur either primarily, when the vesical mucosa protrudes through a congenital defect in the bladder wall, or secondarily to bladder outflow obstruction. In adults the occurrence of multiloculated secondary diverticula is mainly due to subvesical obstruction. This seemingly autosomal dominant form of solitary diverticula in men was mostly associated with bladder outlet obstruction.

Adolescent↗
PubMed1981

[Television recording and demonstration of open surgical procedures with a new system (author's transl)].

Our first experiences with taping of open surgical interventions using TUR teaching attachment adapted to a TV-camera is reported. Successful attempts to film in deep surgical wounds with an optic for laparascopy adapted to a teaching attachment in connection with a TV-camera are reported. The equipment does not interfere with the surgeon and there are no problems with sterility. The image quality is sufficient for demonstrating even small details.

Methods↗
PubMed1980

[Technique of transurethral electroresection in high-pressure irrigation. Use of a multifunctional irrigation stopcock (author's transl)].

Despite the existence of technically excellent resectoscopes the development of new and better instruments is possible and necessary. Only thereby, in the various resection techniques, as in high- and low-pressure irrigation, mechanically correlated instrumental insufficiencies can be compensated. With the use of a multifunctional irrigation stopcock, presented in this article, the TUR technique can be remarkably improved by steplessly regulatable water flow in combination with high-pressure irrigation.

Electrosurgery↗
PubMed1980

[Micromorphological and functional alterations of the kidney during persistent ureteral obstruction (author's transl)].

Alterations on the upper urinary-tract and on the kidney have been investigated by histology and scanning-electron-microscopy (SEM) in an animal study on the rat. Examinations have been performed 7, 14, 28 and 56 days after double-ligating the ureter. The documentation shows the developed alterations which are remarkable in the area of the papilla and medulla of the kidney, whereas the glomerula are nearly unchanged in comparison with the controls. At the same time function-tests with radioactively labelled Jodium-Hippuran and technetium-DTPA have been performed. The nephrograms in the region of interest technique showed after 14 days isosthenuria and after 4 weeks no signs of any function on the operated side.

Animals↗
PubMed1979

[Urethral strictures following transurethral instrumentation: causes, prevention, results (author's transl)].

The paper discusses the multiple causes of developing urethral stricture after transurethral instrumentation. Methods are presented how these causes may be avoided with specially by on internal urethrotomy. 1660 cases of TUR show, that in 12,1% an internal urethrotomy was necessary to introduce a 24 F instrument. The frequency--distribution of the localisation of the sites of internal urethrotomy is presented. Follow-up shows that postoperative strictures have developed in 5,1% in cases without internal urethrotomy and only in 2,6% in cases where internal urethrotomy was performed before introducing the instrument for TUR.

Cystoscopy↗
PubMed1977

[On a modification of the otis urethrotome (author's transl)].

A modification of the Otis urethrotome is presented and the technique of internal urethrotomy with this instrument is described. The instrument opens parallel, and the incision blade makes a cut in two directions possible. Special additional parts at the top of the instrument make the introduction easier. The unintentional stretching of the urethra by the extraction of a conical instrument is therefore avoided.

Humans↗
PubMed1977

[Transurethral resection of bladder tumors--indication, technique and results (author's transl)].

In the period 1965 to 1975 treatment of bladder tumors was carried out in 730 patients. A transurethral tumor resection was performed in 86% of which 722 patients were reviewed. The results have been analyzed with respect to the grade and the stage of the tumor. There is a 55% survival with papilloma and transitional cell carcinoma grade 1 and 15% with grades 2, 3, squamous cell carcinoma and adenocarcinoma. The morbidity rate was low, 1.1%. Indication and technique for transurethral bladder tumor resection are reported in detail. From several points of view the transurethral resection is better than the total cystectomy.

Adolescent↗
PubMed1977

[Epithelial tumors of the urinary bladder in the first twenty years of life (author's transl)].

Eighty two cases of epithelial tumors of the bladder in the first two decades of life have been reviewed from the literature. A case of a transitional cell carcinoma, grade I--II, in a 16-year-old boy is presented. Transurethral electroresection was done and there was no recurrence, two years postoperatively. In 70% of all cases a hematuria was found. The epithelial bladder tumors in children have a better prognosis, a lower tendency to recur and a lower grade malignancy than tumors in adults. Treatment of choice is transurethral or suprapubic tumor excision without drug chemotherapy or radiation therapy.

Adolescent↗
PubMed1976

[The bladder-stone punch--a new principle of visual lithotripsy (author's transl)].

Description of a bladder-stone lithotriptor which works similarly to a punch resectoscope. This 24 French instrument can be used in simultaneously with electrohydraulic lithotripsy (Urat I), i.e., stones of the size of a cherry can be simply punched, while all larger stones may be destroyed first by electrohydraulic lithotripsy and then cut into smaller pieces for removal with the punch. The instrument, with irrigation qualities and a sight like a resectoscope, allows a quick operation, so that lithotripsy and TUR of the prostate may be performed opportunely.

Cystoscopy↗
PubMed1976

[The controlled TUR: a new method for the measurement of intraoperative blood-loss during TUR (author's transl)].

The measurement of intraoperative blood-loss during TUR is concerned as a compulsory procedure for this kind of operation. After testing so far known methods for measuring blood-volume in blood-water-mixtures and demonstrating greater disadvantages of these methods, we developed a new photometer, which allows an immediate and exact estimation of the blood-loss. We compared this new method with other also exact but more complicated methods, had laboratory tests and tests in the daily operative routine and excluded possible mistakes.

Aged↗