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Biomedical subjects

G Benoit

Publications and source records attributed to G Benoit.

At least 91 records · Page 5Linked to original sources
PubMed1992

[Vesico-sphincteric disorders in patients with Parkinson's disease].

Vesicosphincteric disorders are frequent in patients with Parkinson's disease, due to a lesion of the locus niger of the extrapyramidal tract which no longer secretes sufficient dopamine to activate the nigrostriatal tract. The commonest symptoms are urgent micturition, dysuria or a combination of the two. 50% of patients with Parkinson's disease present with disturbances of micturition and these symptoms may be presenting complaint of the disease in 10% of cases. Cystomanometry reveals detrusor hyperactivity in more than 60% of cases and hypoactivity in less than 30% of case, while dyssynergia is less common. Delayed relaxation of the striated sphincter may sometimes be observed. Urological problems must therefore be distinguished from urological problems in these patients. A combined urological and urodynamic assessment is essential as the risk of incontinence following prostate surgery is 20%. Stress urinary incontinence in women may mask or be associated with urgency. These vesicosphincteric disorders must therefore be treated cautiously with a combination of medical treatment (dopatherapy increases detrusor control), retraining and occasionally surgery after a detailed urodynamic assessment.

Female↗
PubMed1991

Decrease in renal vascular resistance in University of Wisconsin solution preserved kidney transplants.

Renal vascular resistance was compared in 2 groups of renal grafts: group 1-16 kidneys perfused with University of Wisconsin solution and group 2-16 kidneys perfused with Euro-Collins solution. Both groups had comparable donors and recipient criteria. Renal blood flow was measured by a miniaturized pulsed Doppler probe fixed on the graft renal artery. Renal vascular resistance was calculated either according to the formula: renal vascular resistance (mm. Hg/ml. per second) = systemic arterial pressure (P)/renal blood flow or through the renal vascular resistive index (RVRI): RVRI = systolic flow velocity - diastolic flow velocity/systolic flow velocity = (S-D)/S. Renal vascular resistance estimation seems to be more contributory than renal blood flow in assessment of renal graft reperfusion disorders. Our results show that University of Wisconsin solution seems to preserve intrarenal arterial caliber better with a decrease in intrarenal vascular resistance, thus, allowing for a higher arterial graft perfusion flow.

Adenosine↗
PubMed1991

[Histologic identification of the afferent fibers of the pelvic plexus].

The inferior hypogastric (pelvic) plexus conveys two types of fibres: sympathetic fibres originating in the thoracolumbar sympathetic chain and parasympathetic fibers originating in the sacral anterior rami. By using a histofluorescent stain (glyoxalic acid) and a histochemical stain (thiocholine) in 17 fresh cadavres, we have demonstrated that the sympathetic fibres arise from sacral sympathetic ganglia. These fibres participate in the constitution of the pelvic splanchnic nerves. In this study, we confirm that the inferior roots of the pelvic plexus are not only parasympathetic, but also sympathetic.

Adrenergic Fibers↗
PubMed1990

Transplant renal artery stenosis: experience and comparative results between surgery and angioplasty.

One hundred thirty-eight patients with transplant renal artery stenosis (TRAS) were identified among 1200 patients undergoing renal transplantation in our university hospital. Severe systemic hypertension was the main symptom leading to a diagnosis of TRAS. Only 88 TRAS patients were given interventional treatment consisting of percutaneous angioplasty (PTA; n = 49) or surgical repair (SR; n = 39). The immediate success rate was 92.1% for SR and 69% for PTA. The long-term success rate was 81.5% for SR and 40.8% for PTA, with a follow-up period of 56.7 +/- 22.4 months (SR group) and 32 +/- 28.1 months (PTA group). PTA morbidity reached 28%, compared to 7.6% in the SR group. In spite of these results, we still favor PTA as a first line interventional treatment when TRAS is recent, linear, and distal and primary SR in cases of kinking and proximal TRAS.

Adolescent↗