Nitric oxide based influence of nitrates on micturition in patients with benign prostatic hyperplasia.

Background: Nitric oxide (NO) is involved in the physiologic regulation of smooth muscle relaxation in the prostate. Organic nitrates act as NO donors. In this prospective open study we prove the influence of orally given nitrates on micturition.

Transcutaneous penile oxygen pressure during bicycling.

Objective: To evaluate the blood supply to the penis during bicycling and thus determine whether the associated perineal compression might be responsible for some cases of impotence.

Subjects And Methods: The transcutaneous penile oxygen partial pressure (pO2 ) at the glans of the penis was measured in 25 healthy athletic men; pO2 is readily measured by noninvasive techniques currently widely used in the management of premature infants, and which have been shown to give pO2 levels that correlate with arterial pO2 levels. The measurements in the healthy subjects were taken in various positions, before, during and after bicycling.

Pneumatic v electrokinetic lithotripsy in treatment of ureteral stones.

Recently, a new device (Combilith) for electrokinetic lithotripsy (EKL) has become available which is very similar to the well-known device for pneumatic (ballistic) lithotripsy (Swiss Lithoclast). The Lithoclast uses air pressure to push a projectile within the handpiece against the end of a metal probe, which is thereby accelerated and thrown like a jackhammer against the stone. In principle, the same stroking movement of a small metal probe is provided by EKL; the difference is that instead of a projectile, a magnetic core within the handpiece is accelerated by the electromagnetic principle.

Nephrogenic adenoma of the bladder.

A nephrogenic adenoma of the bladder in a 4-year-old girl with a past history of urologic surgery for vesicorenal reflux is described. The multifocal tumor was treated by transurethral resection. Relapse occurred 15 months later and was again treated by transurethral resection.