Setchell B P, Bergh A, Widmark A, Damber J E
Department of Urology, University of Umea, Sweden.
Int J Androl. 1995 Jun;18(3):120-6. doi: 10.1111/j.1365-2605.1995.tb00397.x.
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.
利用激光多普勒血流探头，已在麻醉大鼠的睾丸实质中证实了血管运动（血流的自发性节律变化）。随着睾丸温度升高，平均血流量无变化，但血管运动频率增加而幅度减小，直至在36℃至42℃之间血管运动消失。随后当睾丸冷却时，血管运动重新出现，且随着温度下降幅度增大而频率减小。在对照组大鼠中，其睾丸温度维持在约33℃的正常阴囊温度，在相同时间段内血管运动无变化。在两组大鼠中，当睾丸温度随后降至正常阴囊温度以下时，血管运动幅度增大且频率进一步降低，而平均血流量无任何变化。在实验结束时，当睾丸温度在19℃至27℃之间时，也用微球测量了毛细血管血流量，冷却组与对照组的睾丸或附睾之间无差异。
