Radiotelemetric manometry of the urinary bladder.
Explore the source record for details and available documents.
Female↗
Biomedical subjects
H Derouet
Publications and source records attributed to H Derouet.
Muscular cavernous single cell analysis (MCSCA) in patients with venoocclusive dysfunction (VOD).
Explore the source record for details and available documents.
Action Potentials↗
[Radiotelemetric manometry of the urinary bladder].
The standard procedure for manometric investigation of bladder function involves the use of a urethral catheter. The presence of this foreign body causes irritations, however, with a resultant increase in urethral resistance. This perturbs the micturition process, but it can be avoided by a new telemetric method of intravesical pressure measurements. A very small pressure gauge and radio emitter are introduced into the bladder, and the values measured are transmitted to an external receiver. Thus, for the first time, is possible to perform physiological studies of bladder function that do not require catheterization or special positioning of the patient and are well tolerated. Some examples are described, which show that this method allows repeated catheter-free investigations over longer periods of time and accurate evaluation of the effects of pharmacological products on bladder function.
Adult↗
[Treatment of erectile dysfunction with vacuum pumps].
A Vacuum constrictor device (VCD) was tested in 90 patients with organic erectile failure, some of whom had positive and some, negative responses to intracavernous self-injection of vasoactive drugs. Acceptance of the VCD overall was 37%. Among the 49 patients who did not respond to intracavernous injection of vasoactive drugs, acceptance was 45%, clearly higher than among the 41 responders to the injections, only 27% of whom accepted the VCD. Isolated subcutaneous hematomas were the only noteworthy complications observed with long-term therapy (up to 3 years). In cases of so-called venous leakage, the degree of venous outflow disturbance limited the use of the VCD, even in combination with self-injection therapy. The VCD is a successful alternative therapeutic option for the treatment of organic erectile failure, with a lower primary acceptance than corpus cavernosum self-injection therapy.
Adult↗
[Nuclear magnetic resonance tomography for improving the differential diagnosis of pathologic changes in the scrotal contents].
A total of 75 patients with scrotal pathology were examined using magnetic resonance imaging (MRI). The diagnostic results were compared with operative and histological findings and with the sonographic results available. Compared with sonography, MRI showed diagnostic advantages in the detection and characterization of malignant tumors and in the exclusion of non-tumorous testicular pathology (old torsions, periorchitis, old hematomas). No false-negative results were found by MRI. False-positive results were found in 2 out of 75 MRI examinations. The possibility of showing tunica albuginea, of imaging testes in various planes and its diagnostic accuracy of about 88% as well as the lack of ionizing irradiation make MRI the most reliable form of diagnostic imaging in the classification of scrotal pathology. Sonography (51/75) showed high sensitivity in detecting testicular disease (90%), but its specificity (55%) was disappointing and could not be quantified with regards to the differentiation of testicular cancer.
Adolescent↗
[Fournier's gangrene].
Today Fournier's gangrene ranks among necrotizing fasciitis. Most of the cases reveal the origin of the disease (proctogenic, urologic, gynecologic). Untreated, the polybacterial synergistic infection will overwhelmingly spread along anatomically defined fascias of the pelvic floor. Thus the lethality rate is high, especially in patients with risk factors i.e. diabetes, alcoholism, arterial occlusive disease, chronic consumptive disorders and obesity. Only by instant and radical surgical excision of the total gangrenous tissue the spreading of the disease and the developing of sepsis can be stopped together with calculated antibiotic therapy and intensive care. Mutilating operations (i.e. penectomy, orchiectomy) are seldom necessary; thus plastic reconstructions will show good results both in function and cosmetic. Based on the experience with 6 patients, a pathogenic concept, concerning both diagnosis and therapy, is presented: after radical emergency surgery in the first risky stage, an elective approach can safely be performed in a second stage for the repair of functional lesions.
Aged↗
[Magnetic resonance tomography in the differential diagnosis of pathologic changes in scrotal contents--a comparison with computed tomography].
48 patients with scrotal pathology were examined by magnetic resonance tomography (MRI) and computed tomography (CT). The diagnostic results were compared to surgical and histological findings. The correct diagnosis could be detected in 81% by CT and in 85% by MR. Another 27 patients were examined only by MR with positive results in 88%. Demonstration of tunica albuginea, imaging of testes in various planes and diagnostic accuracy in about 88% with missing ionising irradiation make MRI the most reliable diagnostic imaging in the classification of scrotal pathology. False negative results were found in 1/48 by CT and none by MRI. False positive results could be found in 2/75 of MRI examinations but none in CT.
Abscess↗
[Acceptance of corpus cavernosum auto-injection therapy in long-term treatment of erectile dysfunction].
A total of 121 patients suffering from erectile dysfunction were evaluated by means of a questionnaire. In all these cases corpus cavernosum autoinjection therapy had been recommended. The aim of the study was to determine the acceptance and complications of the therapy, general level of satisfaction with it, and reasons for refusal. Completed questionnaire were received from 89 patients (75.5%), 56.2% of whom had applied the therapy continuously, while 18% had broken it off and 25.8% had never started on therapy (cumulative dropout rate 43.8%). The complications encountered were temporary hematomas (25.8) and deviations of the penis (10.1%). In 6.1% indurations of the penis were found. The frequency of prolonged erection needing an antidote was 0.07% in the continuous treatment group. The relatively high drop-out rate in the autoinjection therapy group shows the necessity for intensive patient care and the need for alternative therapy options and a more critical view of reports already published of success with autoinjection therapy.
Erectile Dysfunction↗
[Alloplastic ureter substitution and limitations in clinical application. A status analysis].
Operative ureteral replacement with the patient's own body tissue or by reconstructive ureteral surgery is indicated relatively often. The operative methods applied vary: they include pelvic flap pyeloplasty, caudal transposition of the kidney, interposition of the small intestine, trans-ureterostomy, calico-ureterostomy, of bladder flap transplantation and autotransplantation of the kidney. When the indications are correctly observed with reference to the kind and location of the ureteral lesion all these methods are successful. The methods of alloplastic replacement of the ureter, in contrast, have lost clinical importance and should be performed only in rare, isolated cases, mainly as a short-term solution. Possible indications are a poor general condition in patients for whom alloplastic ureteral replacement is the only alternative to permanent nephrostomy and malignant tumours requiring immediate irradiation, which cannot be postponed until definitive wound healing has taken place following a plastic operation. It is important that problems of biocompatibility have now been largely overcome. Segmental ureteral replacement with alloplastic materials is not possible, however, and the functional difficulties with urinary transport have not been solved in the long term, even in models with pumps and reflux-preventing mechanisms.
Biocompatible Materials↗
[The value of corpus cavernosum sonography following administration of vasoactive substances in the diagnosis of patients with erectile impotence].
In 70 Patients with erectile dysfunction, ultrasound examination of both corpora cavernosa after intracavernous injection of papaverine was done using B-scan, Duplex scan and Doppler color. B-scan can detect morphological disease in a penis profundis, the higher degrees of cavernous muscle myopathia, and disease of the tunica albuginea. For the analysis of pulse curve and the measurement of blood-flow velocity, the Duplex scan is necessary. Doppler color imaging enables ultra sonographic examination of a dorsalis and a penis profundis and can detect intracavernous vascular pathology. The results show that ultrasonography is an important diagnostic tool in patients with erectile dysfunction. A differentiated therapeutic strategy can be based on this examination, especially when revascularization procedures are being discussed. Additionally, better follow-up of patients under self-injection therapy is possible.
Adult↗
[Computed tomography of acute bacterial nephritis].
Five case reports are used to illustrate that it is possible by computed tomography to differentiate between acute diffuse, acute focal and abscess-forming types of renal infection. In acute diffuse renal inflammatory disease, intravenously injected contrast medium remains in various parts of the renal tissue after an interval of two to six hours following injection. Acute focal inflammatory disease and abscesses produce localised hypodense or isodense lesions. Sequential increase in density following a contrast bolus injection permits the distinction of focal nephritis from an abscess. These findings provides information concerning the type and duration of treatment.
Acute Disease↗
[Computed tomographic studies of the scrotal contents, particularly the testis].
CT examination of the testes was carried out in 49 patients for the investigation of testicular tumours. Hypodensity and inhomogeneity were typical of teratomas and hyperdensity and relative homogeneity of seminomas. Granulomatous orchitis and lymphomas showed the same characteristics as seminomas. Three testes in the abdomen could be localised and classified. One non-palpable primary tumour was found as well as an old partially calcified tumour, three old torsions and one lipo-sarcoma. In about 10% it was not possible to distinguish between tumour and inflammatory lesions. Compared with sonography, CT has advantages, particularly in the diagnosis of old torsion.
Abdominal Neoplasms↗