Biomaterial Database

Effect of testicular temperature on vasomotion and blood flow. 1995

B P Setchell, and A Bergh, and A Widmark, and J E Damber

Department of Urology, University of Umea, Sweden.

Vasomotion (spontaneous rhythmic variations in blood flow) has been demonstrated in the parenchyma of the testes of anaesthetized rats, using a laser-Doppler flow probe. As the temperature of the testis was increased, mean blood flow showed no change, but the frequency of vasomotion increased and its amplitude decreased, until vasomotion disappeared between 36 degrees C and 42 degrees C. As the testis was then cooled, vasomotion reappeared, and increased in amplitude and decreased in frequency as the temperature fell. In control rats, in which the temperature of the testes was maintained at normal scrotal temperature of about 33 degrees C, there no changes in vasomotion over an equivalent period. In both groups of rats, when the temperature of the testes was then allowed to fall below normal scrotal temperature, the amplitude of vasomotion increased and its frequency decreased even further, without any change in mean blood flow. Capillary blood flow was also measured with microspheres at the end of the experiment, when testicular temperature was between 19 degrees C and 27 degrees C, and there was no difference between the cooled and control testes or epididymides.

UI	MeSH Term	Description	Entries
D007668	Kidney	Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.	Kidneys
D008297	Male		Males
D011467	Prostate	A gland in males that surrounds the neck of the URINARY BLADDER and the URETHRA. It secretes a substance that liquefies coagulated semen. It is situated in the pelvic cavity behind the lower part of the PUBIC SYMPHYSIS, above the deep layer of the triangular ligament, and rests upon the RECTUM.	Prostates
D012039	Regional Blood Flow	The flow of BLOOD through or around an organ or region of the body.	Blood Flow, Regional,Blood Flows, Regional,Flow, Regional Blood,Flows, Regional Blood,Regional Blood Flows
D001831	Body Temperature	The measure of the level of heat of a human or animal.	Organ Temperature,Body Temperatures,Organ Temperatures,Temperature, Body,Temperature, Organ,Temperatures, Body,Temperatures, Organ
D002196	Capillaries	The minute vessels that connect arterioles and venules.	Capillary Beds,Sinusoidal Beds,Sinusoids,Bed, Sinusoidal,Beds, Sinusoidal,Capillary,Capillary Bed,Sinusoid,Sinusoidal Bed
D004822	Epididymis	The convoluted cordlike structure attached to the posterior of the TESTIS. Epididymis consists of the head (caput), the body (corpus), and the tail (cauda). A network of ducts leaving the testis joins into a common epididymal tubule proper which provides the transport, storage, and maturation of SPERMATOZOA.
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013737	Testis	The male gonad containing two functional parts: the SEMINIFEROUS TUBULES for the production and transport of male germ cells (SPERMATOGENESIS) and the interstitial compartment containing LEYDIG CELLS that produce ANDROGENS.	Testicles,Testes,Testicle
D017078	Laser-Doppler Flowmetry	A method of non-invasive, continuous measurement of MICROCIRCULATION. The technique is based on the values of the DOPPLER EFFECT of low-power laser light scattered randomly by static structures and moving tissue particulates.	Doppler-Laser Flowmetry,Flowmetry, Laser-Doppler,Laser-Doppler Velocimetry,Velocimetry, Laser-Doppler,Doppler Laser Flowmetry,Flowmetry, Doppler-Laser,Flowmetry, Laser Doppler,Laser Doppler Flowmetry,Laser Doppler Velocimetry,Velocimetry, Laser Doppler