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Biomedical subjects

H Porst

Publications and source records attributed to H Porst.

At least 37 records · Page 2Linked to original sources
PubMed1988

[Comparison of papaverine-induced Doppler sonography and angiography in the diagnosis of erectile dysfunction].

In the course of the evaluation of 500 patients with erectile dysfunction the results of penile Doppler-sonography and penile angiography could be compared in 65 patients, in whom both investigations were carried out under standardized conditions. Criteria for the evaluation of penile Doppler-sonography were the wave form analysis and especially the increase of blood-flow in the investigated arteries after intracavernous injection of papaverine. Criteria for the evaluation of the angiograms were the depiction of the penile arteries as well as the evidence of obstruction and collaterals of the internal iliac and pudendal arteries. In regard to the dorsal penile artery an all over correlation of 96.1% and in regard to the deep penile artery of 92.3% could be found. Based on these findings the conclusion can be drawn that papaverine-induced Doppler-sonography is able to replace penile angiography, thus no longer serving as the golden standard in the diagnosis of arterial insufficiency.

Angiography↗
PubMed1988

[Ectopic ureterocele--diagnosis and therapy].

The ectopic ureterocele is a relatively frequent congenital abnormality of the urinary tract. Its clinical signs are often uncharacteristic. Therefore the sometimes discrete changes in the diagnostic evaluations have to be looked for. The various procedures of which the excretory urography still plays a central role are discussed with their possibilities and limitations. The removal of the mostly dysplastic upper segment with its ureter is usually the most sensible treatment. Only in rare cases, where scintigraphically and clinically the segment seems preservable, a ureteropyelostomy is indicated. The different indications for primary and secondary excision of the ureterocele itself are outlined. A minimal therapy, that does not correct the underlying anatomical abnormality like the endoscopic incision should be reserved for uroseptic emergencies.

Child↗
PubMed1987

Relevance of dynamic cavernosography to the diagnosis of venous incompetence in erectile dysfunction.

Dynamic cavernosography with flow and cavernosometric studies was performed on 140 patients, 18 of whom served as a control group. Of the 122 multidisciplinary investigated patients with erectile dysfunction 66 (54.1 per cent) showed associated venous leakage. Insufficiency of the dorsal penile veins (29 patients, 44 per cent) and complicated venous leakage (23 patients, 34.8 per cent) were predominate. In 63 patients with erectile dysfunction the results of an additional papaverine test were compared to the results of dynamic cavernosography, and they indicated a sensitivity of more than 90 per cent in regard to evidence or exclusion of venous incompetence in erectile dysfunction.

Adult↗
PubMed1987

[Blunt kidney trauma in childhood].

In a retrospective analysis of 42 paediatric blunt renal injuries the indications for conservative and surgical treatment were evaluated. The type of injury (contusion, laceration, fragmentation, pedicle injury), associated injuries, the diagnostic procedures, the therapy and its results were analysed. All 18 contusions were treated conservatively. For the 24 severe injuries there was a surgery rate of 66% (16/24), a renal loss rate of 16% (4/24); the other organs could be saved by the operation. With primarily conservative treatment we had to operate in one case only due to recurrent haematuria; the renal loss rate was 0%. The following criteria are defined as indications for surgical treatment: (1) deteriorating vital signs, (2) pedicle injury, (3) large devitalized renal segments, (4) large extravasations of contrast medium ("Page kidney").

Adolescent↗
PubMed1987

Somatosensory evoked potentials after stimulation of the dorsal penile nerve: normative data and results from 145 patients with erectile dysfunction.

Somatosensory evoked potentials (SSEPs) recorded from scalp after stimulation of the dorsal penile nerves, terminal branches of the pudendal nerve, were examined in 30 normal potent men and in 145 patients with erectile dysfunction of different etiologies. In the control group there was a significant relationship between latencies P1 and N1 and the subjects' height. In the patient group SSEPs were absent in 12 subjects, a prolonged latency was found in 28 patients.

Adolescent↗
PubMed1987

[Etiology and therapeutic possibilities of post-traumatic erectile impotence].

Based on 12 patients with posttraumatic erectile dysfunction due to pelvic fractures, ruptures of urethra and straddle-trauma, the diagnostic and therapeutic means in the management of erectile failure are discussed. The most frequent etiology encountered in posttraumatic erectile failure were combined arterial-neurogenic lesions followed by insufficiencies of the venae profundae penis as a sequelae of pelvic fractures or symphyseal ruptures. Promising therapeutic alternatives represent injections of cavernous bodies with vasoactive drugs, penile implants and also in suitable cases penile revascularization procedures.

Adult↗
PubMed1987

[Dynamic cavernosonography and intracavernous drug testing in the diagnosis of erectile dysfunction].

Based on 216 dynamic cavernosographies, performed in 25 patients with normal erectile capacity and in 191 patients with erectile dysfunction, an evaluation of this method in regard to its diagnostic validity in erectile dysfunction was possible. An additional comparison of the results of intracavernous application of vasoactive drugs with the outcome of dynamic cavernosography in 141 patients showed that a negative or clearly positive test-outcome indicated in over 90 per cent of the evaluated patients the presence or lack of venous insufficiency during dynamic cavernosography.

Adolescent↗
PubMed1987

[Current diagnosis of pediatric kidney trauma: consequences for therapy planning].

For the therapy of pediatric renal trauma there is always the question of the appropriate diagnostic measures. The various procedures such as ultrasound, urography, scintigraphy, computed tomography, conventional angiography, arterial and venous digitalized subtraction angiography are discussed. By these new methods it is possible to judge the severity of renal trauma more accurately and to limit the indications for an operation. With stable circulation an operation should only be performed in the presence of a large, expanding retroperitoneal hematoma, extensive extravasation (urinoma), persistent massive hematuria or if large areas of devitalized renal tissue are found.

Adolescent↗
PubMed1987

[Hemangioma of the kidney--diagnostic and therapeutic problems].

Hemangioma of the kidney as one of the possible causes of "essential hematuria" is discussed with special regard to its diagnostic features in the various modern radiological examinations. Still most important is angiography. Typical findings are demonstrated in a case with complete replacement of the parapelvic fat by a large cavernous hemangioma. The various therapeutic possibilities--conservative treatment, embolisation, partial or complete nephrectomy - are discussed.

Adult↗
PubMed1986

[DSA and conventional angiography compared in the angiographic diagnosis of impotence].

Twenty-three patients complaining of impotence were examined angiographically as part of their investigation. In all patients, DSA as well as conventional angiography was carried out. The purpose of this investigation was to compare the two methods with regard to their diagnostic value. By means of sequential analysis it was shown that, with an error level of 10%, DSA was superior to conventional angiography.

Adolescent↗
PubMed1986

[Dynamic cavernosography. Radiologic diagnosis of venous induced erection disorders and erectile body diseases].

In 30 to 50% erectile dysfunctions are due to vascular disorders. Roughly a third of these vasculogenic disturbances is based on venous disorders. These venous-induced erectile failures may be objectivated and radiologically located via dynamic cavernosography, combined with a simultaneous recording of a cavernous pressure profile. Based on over 130 examinations it was possible to provide both an exact description of the normal venous drainage in normal potent men and to give a good idea of the different venous leakages in patients complaining of erectile dysfunctions. Congenital and acquired penile deviations along with Peyronie's disease may also be appropriate for dynamic cavernosography.

Adolescent↗
PubMed1986

[The bulbocavernosus reflex in controls and patients with potency disorders].

The bulbocavernosusreflex (BCR) was examined in 34 controls and in 98 patients with disturbances of potency. The shortest and longest latencies, the mean and the temporal dispersion out of ten successive reflex responses were measured. Additionally the smallest and largest side differences were determined when recording reflex responses simultaneously from the right and left bulbocavernosus muscles. BCR measurements revealed pathological results in 57 patients. Most sensitive parameters were the temporal dispersion and maximum side difference.

Adolescent↗
PubMed1986

[Diagnostic and therapeutic problems in renal oncocytomas].

Renal oncocytomas are a well-defined tumor entity and can be differentiated from renal cell carcinomas both from the histological point of view and the clinical course. An illustration of three case reports and a review of the literature underline the diagnostic and therapeutic dilemma in the management of this tumor-type. At present no pre- or intraoperative diagnostic means are available for definite differentiation of pure renal oncocytomas from renal cell carcinomas. Because of this lack of reliable diagnostic means therapeutic management of oncocytomas will continue to be in nephrectomy. In a minority of the reported cases oncocytomas were found in a bilateral or multicentric manifestation thus requiring a more conservative surgical management as recommended for bilateral hypernephromas.

Adenoma↗
PubMed1986

[Nephrotoxicity of ionic and nonionic contrast media in selective renovasography].

Nephrotoxic effect of ionic and non-ionic contrast media was examined in a doubleblind study by evaluation of serum creatinine, blood urea nitrogen, urine volume, urinary protein excretion and erythrocyturia before and after selective renovasography. In 19 of 22 patients reliable results were obtained. With optimal hydration before and after renovasography no significant differences between both administered contrast media (Rayvist 300 and Omnipaque 300) could be found by evaluation of the aforementioned parameters. In 3 patients with preexistent proteinuria (greater than 200 mg/l) urine protein excretion remained at the same or a lower level after application of the non-ionic contrast medium Omnipaque 300. Three patients with proteinuria tended to increase the proteinuria after administration of the ionic contrast medium (Rayvist 300) up to 48 h after angiography indicating a higher nephrotoxic potential of ionic contrast media in patients with preexistent renal disease. The constant values of urine volume and serum creatinine indicate an absence of clinically relevant nephrotoxicity of both contrast media in this study when administered in well-hydrated patients. This emphasizes the importance of sufficient hydration in prophylaxis of nephrotoxic effects, especially in patients with risk factors.

Adult↗