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Biomedical subjects

B Lobel

Publications and source records attributed to B Lobel.

At least 91 records · Page 5Linked to original sources
PubMed1996

Value of nocturnal penile tumescence and rigidity (NPTR) recording in impotent patients with multiple sclerosis.

The etiology of impotence in patients with multiple sclerosis (MS) is difficult to assess due to the possibility of normal nocturnal penile tumescence and rigidity (NPTR) recording despite neurologic involvement. Sixteen patients with MS and impotence were studied with Rigiscan, cavernous artery doppler, neurophysiological tests and intracavernous injection of PGE1. When more restrictive criteria of normality than usual are used for Rigiscan (rigidity > or = 80% and/or duration > 30 minutes), an inverse relationship between NPTR recording and sexuality score or PGE1 dose is reported. No significant difference is noted for neurophysiological tests. With such criteria, Rigiscan alone or combined with intracavernous PGE1 is a valuable means to differentiate neurogenic from psychogenic impotence in MS patients. Neurophysiological tests are of limited clinical value.

Adult↗
PubMed1995

[Treatment of cystitis in women].

Acute cystitis is a benign curable condition which affects at least one out of every two women at least once in their life. In uncomplicated cases, urinalysis is usually unnecessary as a simple dip stick test is sufficient for diagnosis and prescription of a short antibiotic regimen (a single dose or a 3 day treatment). Complicated acute cystitis requires a more precise diagnosis and justifies urinalysis and imaging. Antibiotics adapted to germ sensitivity is prescribed until bacteriologically sterile urine is obtained (3 to 10 days). Associated malformations of the urinary tract or obstruction must be managed together with careful control of aggravating factors (diabetes) and personal hygiene. Recurrent cystitis, defined as at least 4 episodes, raises a certain number of problems. The casual germ varies, although Escheria coli is found in approximately 70% of the cases. Several factors favour recurrent cystitis including malformations of the urinary tract, lithiasis, bladder reflux, cystocele or modification of the urethral meatus. Other circumstances such as sexual relations, excessive vaginal hygiene, vaginal tampons and clothing habits may play a role. Antibiotics generally solve the problem, but mechanisms which would improve the organism's specific response are currently under study.

Acute Disease↗
PubMed1995

Is ipsilateral adrenalectomy a necessary component of radical nephrectomy?

Due to the increased use of modern imaging systems during the last few years, kidney tumors are often diagnosed at an earlier and less advanced stage. This fact implies a reevaluation of the operative technique of radical nephrectomy that was recommended 30 years ago. The ipsilateral adrenal involvement during radical nephrectomy for renal cell carcinoma is assessed and the necessity of its extirpation is discussed. Between September 1987 and September 1993, we performed 299 radical nephrectomies for renal cell carcinoma and removed 285 ipsilateral adrenal glands. Eleven adrenal glands (3.8%) were involved with the kidney tumor and 274 (96.2%) were free of disease. In 7 of the adrenal gland involved cases (63.6%) the tumor invaded the gland by direct extension from the superior pole of the kidney. In the other 4 cases the ipsilateral adrenal gland was affected by a metastatic lesion. In all 11 adrenal gland involved cases the tumors were at an advanced stage (the lowest was stage pT3N1). Our results led us to recommend adrenalectomy during radical nephrectomy only when direct extension of the kidney tumor into the gland is suspected (upper pole or large tumors) or when the adrenal is the site of a single metastasis. Macroscopically normal adrenal glands at radical nephrectomy should not be routinely extirpated. Metastatic renal cell carcinoma (not by contiguity) in the ipsilateral adrenal gland should be regarded as a stage M+ (distant metastasis) tumor.

Adrenal Gland Neoplasms↗
PubMed1995

Treatment of the intraoperative penile erection with intracavernous phenylephrine.

A total of 23 patients who had an intraoperative penile erection during endoscopic or penile surgery underwent intracavernous injection of 200 micrograms phenylephrine. Detumescence occurred rapidly in all patients with a single injection. Hemodynamic changes consisted of a transient increase in systolic and diastolic blood pressures (+9%, p < 0.05) without significant change in pulse rate (-5%, p > 0.05). No marked side effect was reported even in elderly patients. Intraoperative penile erection, which seems to be more frequent in patients younger than 50 years, during general anesthesia with propofol or epidural anesthesia, can be treated safely with intracavernous injection of phenylephrine.

Adult↗
PubMed1995

[Testicular microlithiasis: ultrasonographic diagnosis and semiologic value].

Testicular microlithiasis corresponds to calcifications in the lumen of seminiferous tubules. This rare condition, primarily diagnosed histologically, is usually discovered on scrotal ultrasonography. The characteristic appearance combines multiple microscopic hyperechoic areas disseminated bilaterally throughout the testicular parenchyma. The coexistence of microlithiasis and testicular neoplasms has been described and raises the problem of the therapeutic approach following incidental discovery on scrotal ultrasonography performed for other reasons. The authors report a case of testicular microlithiasis discovered on ultrasonography performed after testicular trauma.

Adolescent↗
PubMed1995

[The vaginal route in the treatment of stress urinary incontinence].

Female stress incontinence can always be treated by a transvaginal approach. It is often associated with genital prolapse which must be treated at the same time as the incontinence. Patients can be classified into 4 groups according to the position of the bladder neck, the degree of sphincter function and the associated genital prolapse. Operative techniques designed to simultaneously control incontinence and genital prolapse are indicated for each of these groups. Urologists should be just as familiar with the transvaginal treatment of female stress incontinence and disorders of pelvic tone as gynaecologists now are with urodynamics and cystoscopy.

Female↗
PubMed1994

[Medical treatment of prostate cancer].

Hormone dependence of prostate cancer is well known. In 80% of cases with metastases, hormone suppression leads to the reduction of tumour volume and related disorders. However the treatment is generally palliative because malignant process recurs after about around 16 months. Mean survival is less than 3 years in these forms. Lack of response come always together with a poor prognosis, and there is 90% mortality at 2 years. Advanced prostatic cancer should not be treated with hormones if the patient has few symptoms and his quality of life is satisfactory. Symptomatic forms require hormone manipulation. Orchidectomy or LH-RH are recommended. Total androgen ablation (combined treatment) leads rapidly to more relief of symptoms, but its drawbacks and especially high cost indicate that its use should be weighed individually. Estramustine is not a first-lune treatment. Presently, there is no criteria to predict response to treatment.

Androgen Antagonists↗
PubMed1994

Erythrocyte polyamines and prognosis in stage D2 prostatic carcinoma patients.

We studied 43 patients with newly diagnosed, untreated, stage D2 prostatic carcinoma, and correlated the initial performance status, hemoglobin, prostate specific antigen levels, tumor Gleason grade, extent of disease on the bone scan, and erythrocyte spermidine and spermine levels with progression. Three patients died of unrelated causes and were excluded from the study, 16 remained in remission with a mean 28 +/- 11 months of followup and 24 had progression (18, or 75%, of whom died of the cancer) with a mean 12 +/- 9 months of followup (p < 0.05 for followup) after initiation of hormonal therapy. Pretreatment performance status, hemoglobin, and erythrocyte spermidine and spermine levels were correlated with progression, hemoglobin and spermine being the most significant independent variables (p = 0.006 and p = 0.001, respectively). Concerning cause-specific survival, only hemoglobin and spermine erythrocyte levels were significant independent variables (p = 0.02 and p = 0.0025, respectively). If confirmed, polyamine erythrocyte levels obtained by a simple blood sample could discriminate at diagnosis patients with a high risk of rapid hormonal relapse who may benefit from a more aggressive primary management.

Aged↗
PubMed1994

[Synchronous bladder metastasis of a clear-cell adenocarcinoma of the kidney].

Urinary bladder synchronous metastases from renal cell carcinoma are rare, three cases were reported in the literature and we present the fourth. In these four published cases, the bladder metastases followed a left kidney tumor and in three, a brain metastases was also found. A possible retrograde metastatic dissemination through the left genital and vertebral veins has to be taken in consideration. The short survival after the extirpation of the tumor and the bladder metastases implies a less aggressive approach in the presence of a bladder metastases.

Adenocarcinoma, Clear Cell↗
PubMed1994

[Extracorporeal lithotripsy for urinary calculi: a non invasive technique? Report of 150 patients treated with the Nova lithotriptor].

The NOVA apparatus is an electrohydraulic lithotriptor not yet available in France. The authors present an evaluation of the first 150 patients treated with this machine. 92.2% of the 185 stones treated were fragmented. 141 patients were reviewed at 1 month and, if necessary, 3 months after the first session; 4/24 patients and 1/3 patients were not reviewed after their second and third treatment session, respectively. Evaluation of the 177 sessions performed (16% of second sessions and 2% of third sessions), 69.11% of patients did not have any residual stones. The success rate was 52% for renal stones; 96% for stones of the lumbar ureter and 50% for pelvic stones. The morbidity was low (10% of renal colic, 5% of obstructive stone) but in combination with second treatment sessions, it generated a risk of being rehospitalised after the first session of 26%. When the procedures performed under anaesthesia before and after ECL (apart from repeated sessions) are added, the risk of this supplementary anaesthetic for a given patient is 18.66%. Lastly, the risk of undergoing another anaesthetic after the 1st ECL was 33%. These data indicate the limits of the "noninvasive" nature of a modern and effective lithotriptor.

Adolescent↗
PubMed1994

[Current aspects of varicocele. Analysis of cases treated in the Department of Surgery in Brazzaville].

The authors analyze retrospectively the files of patients who have been operated on for varicocele between 5th may 1992 and 5th may (12 months) in Talangaï hospital at Brazzaville. The overall operation rate for that pathology was 1.1%. Prevalence according to age group is as follows: -1 adolescent; -2 young adults; -1 old person. The localization of varicocele was left in all cases. The disease was associated with male infertility in one observation. In all patients, there was a case of primary varicocele. Patients got the surgical cure through the left inguinal route and the post-therapeutic improvement of clinical manifestations was obtained between D30 and D90. The authors make comments on those results and they clarify points on certain current aspects of the disease.

Adolescent↗
PubMed1994

[Acquired experience in anesthesia and perioperative intensive care in percutaneous nephrolithotomy. Current approach in the endoscopic treatment of lithiasis and pyelo-ureteral junction anomalies].

Percutaneous endoscopic treatment of the kidney retains a place in the treatment of renal stones (percutaneous nephrolithotomy--PCNL) and ureteropelvic junction abnormalities (endopyeloplasty). It requires anaesthesia ensuring surgical comfort and safety for the patients despite changes in position and the prolonged ventral supine position. The operation carries certain iatrogenic risks related to caliceal irrigation in patients with more or less documented episodes of infection and carries risks of haemorrhage and effraction of adjacent organs. 282 patients treated by PCNL between 1984 and 1991 were reviewed in order to define the respective indications for general anaesthesia and peridural anaesthesia and to determine the modalities, to evaluate the risk and severity of absorption of irrigation fluid and to assess the risk of infection by defining the indications for prophylactic antibiotics. General anaesthesia, using etomidate and propofol via an infusion pump, ensures surgical comfort, anaesthetic safety and better control of intraoperative complications. The renewed interest in this technique must be counterbalanced by the growing incidence of anaphylactic reactions related to anaesthetic drugs. Operations lasting more than 2 hours, raised intracaliceal pressure, the initially exclusive use of glycine for irrigation induce haemodilution complications, possibly aggravated by glycine intoxication. Repeated surgery is preferable with the use of an Amplatz tube as often as possible and physiological saline, except when required by the operation. Patients with a history of urinary tract infection or infected stones should receive prolonged and effective antibiotics before, during and after the operation. Prophylactic antibiotics are reserved for those patients with no history of infection. These principles equally apply to percutaneous nephrolithotomy and endopyeloplasty.

Adolescent↗
PubMed1993

Accuracy of ultrasound diagnosis after blunt testicular trauma.

The aim of this study is to determine the value of ultrasound evaluation for the diagnosis of testis rupture due to blunt scrotal trauma. We reviewed 16 operated cases of blunt scrotal trauma with hematocele, which were evaluated by ultrasound preoperatively. In 2 cases a tunica albuginea rupture was correctly diagnosed by ultrasonography but there were 2 false-positive and 5 false-negative diagnoses of rupture. Systematic exploration of the 16 cases revealed testicular rupture in 7, simple hematocele in 7 and hematocele associated with spermatic cord injury in 2. In 2 cases orchiectomy was necessary. From our experience the accuracy rate of ultrasound evaluation of blunt scrotal trauma was 56%, with a 58% negative predictive value. Considering these results, ultrasound examination of blunt scrotal trauma with hematocele is not sufficiently accurate to eliminate surgical exploration and, therefore, we recommended early surgical exploration as primary therapy in these cases.

Adult↗
PubMed1993

Polyamines and prostatic carcinoma: clinical and therapeutic implications.

The erythrocyte polyamines, spermidine and spermine, are known proliferation markers. The authors present their experience with polyamines and prostatic carcinoma. 229 patients with prostatic carcinoma had polyamine erythrocyte determination at diagnosis. Previous results confirmed a tendency to spermidine increase with tumor stage and a significant increase in spermine in metastatic and hormonal escape patients. No correlation was found between polyamine erythrocyte levels and hemoglobin, prostate-specific antigen or tumor grade. 148 prostatic carcinoma patients were followed up. Their pretreatment erythrocyte polyamine levels were correlated to progression. Patients (whatever stage) with rapid progression present significantly enhanced pretreatment erythrocyte spermine levels compared to patients with a favorable outcome. Polyamines are not only proliferation markers but are also necessary for cell division. The authors present their results on polyamine deprivation, combining a polyamine-free diet, polyamine synthesis inhibitors and intestinal tract decontamination, on in vivo tumor growth inhibition of the murine prostatic carcinoma Dunning Mat LyLu tumor model.

Adult↗
PubMed1993

Bladder substitutes, bile acids and the risk of colorectal cancer: an experimental study.

There is a large body of evidence relating the causation of colon cancer to bile acids. Using an animal model, we attempted to address the question, i.e., the incidences of carcinogenesis in the colon as consequences of resection of different bowel segments, predominantly employed in the construction of various forms of intestinal bladder substitutes. 60 male Wistar rats were operated. Group 1 served as control, in group 2, 20 cm of terminal ileum was resected, and rats in group 3 underwent resection of the distal 10 cm of the ileum and 7 cm of the proximal colon. All rats were killed 6 months after surgery and the colon was removed. After examination under 40-fold magnification, in the absence of tumors, 3 biopsies were performed at predetermined positions and underwent histological processing. Even if no tumor was found it would be incorrect to conclude that these results would have an appeasing relevance. The complex and highly different fecal bile acid profiles of the rat compared to man makes it impossible in this context to draw analogies between the rat model and human colonic carcinogenesis. Furthermore, 6 months of observation in the rat might be too short for 'spontaneous' colonic carcinogenesis. Nevertheless, there exists evidence from epidemiological studies to implicate bile acids as an etiological factor in the development and growth of colorectal cancer. Therefore, the importance of colorectal cancer in urologic surgery patients must be kept in perspective. In this direction, further studies are required besides the application of known appropriate preventive measures.

Animals↗
PubMed1993

[Can we do better than surgery in the treatment of benign prostatic hypertrophy? Results after 10 years in endoscopic resection and adenomectomy in urination and sexual disorders].

Surgery is considered to be the reference treatment for obstructive benign prostatic hypertrophy (NPH). Transurethral resection of the prostate (TURP) and suprapubic prostatectomy are the operations most frequently performed by urologists. However, little information is available concerning the long-term results of this surgery. In order to assess the long-term efficacy, we recalled 618 consecutive patients operated for benign prostatic hypertrophy between 1979 and 1982 (390 by TURP and 228 by suprapubic prostatectomy (SP). 167 patients were reviewed and investigated, 150 had died and 301 were lost to follow-up. Ten years after the operation, 85% of the patients reviewed had good or satisfactory micturition and 72% of them were satisfied, regardless of the technique used. In 80% of patients, no complementary procedure was required to ensure urinary comfort. However, the effects of this surgery on sexual function were considerable, as one half of patients reporting sexual intercourse before the operation reported a deterioration of sexual function after the operation. Lastly, long-term morbidity affected 10 to 41% of patients and 9 to 12% of them were reoperated. Although, overall, surgery gave excellent results at 10 years, 15% of patients did not derive any benefit from the procedure. It is therefore important, in the future, to more clearly define the indications for surgery and the place of noninvasive treatments. At the present time, young subjects wishing to preserve their sex life may benefit from noninvasive first-line treatments, provided their quality of life is sufficiently altered by the severity of the urinary symptoms.

Aged↗