Seven unconjugated neutral steroids, including testosterone and some of its precursors and metabolites, were measured in the peripheral and spermatic venous blood males, employing specific radioimmunoassays after the fractionation of steroids on Lipidex-5000 (hydroxyalkoxypropyl Sephadex) microcolumns. Respective mean concentrations (ng/ml) and ranges of steroids estimated in peripheral and spermatic venous ...

Section of the right internal spermatic artery and vein where they overlie the ureter in Wistar-related male rats suggests that the right hydronephrosis found in these animals is not a consequence of simple obstruction by the blood vessels. The diverse effects of this operation on testicular weight presumably reflect variation ...

1. Testicular blood flow (ml. 100 g(-1).min(-1); mean +/- S.E. of the mean) measured in monkeys by (133)Xe clearance was 15.9 +/- 1.2 (twenty-six estimations on three monkeys; six testes) within 15 min of anaesthesia and 7.5 +/- 0.8 (twelve estimates; four monkeys, eight testes), after 1-2 hr of anaesthesia; ...

Twenty-eight clinically detectable varicoceles of various sizes were examined with a Doppler ultrasonic stethoscope. Retrograde blood flow through the left internal spermatic vein was confirmed in all cases irrespective of size of the vascular abnormality. The Doppler stethoscope also was used to evaluate 13 patients suspected of having varicoceles but ...

Varicocele is an important cause of infertility in men. The exact mechanism by which varicocele depresses spermatogenesis is unknown but probably the retrograde flow of blood rich in catecholamines into the testes plays a major role. Because subfertile semen qualities are present in a large percentage of men with varicocele ...

A twelve-year-old male with a five-day history of scrotal swelling and pain had increased blood flow on ultrasonic examination. A testicular flow and scan indicated an ischemic testicle. Surgical exploration revealed complete torsion of the spermatic cord. In chronic cases of torsion, the Doppler stethoscope may give a false negative ...

The arteries and veins of the fox testis were studied using an angiographic technique. The postnatal development of the testis involved only minor modification of the vasculature. In the non-breeding season both the arteries and veins of the adult fox testis undergo extensive spiralization which completely disappears during the breeding ...

Thirty-one patients with intrascrotal disease process have been studied with the Doppler ultrasonic flowmeter to determine if testicular torsion can be differentiated from acute epididymitis when clinical characteristics are ambivalent. In all instances of proved torsion there was a loss of blood flow in the involved testes, whereas in acute ...

The radioisotope 99mTc scans reflect the vascular flow to the testis. As a result the scan shows a distinct cold pattern when arterial profusion is compromised and a hot pattern when blood supply to the organ is increased. This is the basis for use of the technetium scrotal scan to ...

1. [5alpha-(3)H]5alpha-Androst-16-en-3-one (5alpha-androstenone) was infused at a constant rate for 180min into the spermatic artery of a sexually mature boar. Samples of spermatic-venous blood were collected at 1min intervals for the first 10min of the infusion and thereafter at 15min intervals for the first hour, then at 64, 125, 155 ...

During histological and physiological investigations of black vultures (Coragyps atratus) dissection revealed the presence of an "organ", the supracloacal chromolipoid body, which has no counterpart among other warm blooded animals. The organ occurs in both sexes and in birds of different ages. It is located in the median sagittal plane ...