利用微波的热效应原理,对实验动物睾丸进行局部照射,以提高睾丸内部温度,改变精子生成的物理环境,从而抑制精子产生,达到节育目的。本文在相同的实验照射条件,和用睾丸中心与阴囊表面同时进行对比性测温的情况下,对实验规定的不同温度组动物的实验结果进行比较,目的在于探讨微波用于节育时的有效温度阈值。实验用微波源为WL-200型医用微波理疗机。动物用体重2.5公斤以上、照前精子密度在2亿/毫升以上的雄性家兔共60只,随机分为4个大组。各组实验规定温度是以微波照射后,睾丸中心温度上升至实验额定温度为准。4个实验组照射时睾内温度分别确定为:41℃,43℃,44℃,46℃。各组动物照后定期分别进行精子密度动态观察和睾丸组织切片检查。实验结果表明,经微波一次照射20分钟后,睾丸内温度升至41℃时,受照动物精子密度并不下降,为节育无效温度。睾内温度43℃组中一半动物精子密度明显下降,但维持时间较短,节育效果不理想。睾内温度44℃组,在20分钟照射下,无论照射1次或2次,所有实验动物精子密度均有明显下降,于照射后15—19天即可降低至0.3亿/毫升以下,维持低水平时间一次照射亚组在23天左右,两次照射亚组约37天。本组在实验结束时,平均精子密度及睾丸组织学改变均能较好恢复,属于节育有效温度。睾内温度46℃组 The use of microwave heat effect principle, the experimental animals, testicular local irradiation, to increase the temperature inside the testis, changing the physical environment of sperm production, thereby inhibiting the production of sperm to achieve the purpose of birth control. In this paper, under the same experimental conditions of irradiation, and with the testicular center and the scrotum surface at the same time the comparative temperature measurement, the experimental results of different temperature groups of animals to compare the experimental results, the purpose is to explore microwave effective temperature for birth control Threshold. Experimental microwave source for the WL-200 medical microwave physiotherapy machine. Animals with a body weight of 2.5 kg or more, according to pre-sperm density of 200 million / ml or more male rabbits total of 60, were randomly divided into four groups. The experimental set the temperature of each group is irradiated by microwaves, testicular center temperature rise to the experimental rated temperature prevail. The testicular temperatures at 4 experimental groups were determined as follows: 41 ° C, 43 ° C, 44 ° C, 46 ° C. Animals in each group were regularly sperm concentration dynamic observation and testicular tissue biopsy. The experimental results show that after 20 minutes of microwave irradiation, the testis temperature rose to 41 ℃, the irradiated animal sperm density does not decline, is the birth control invalid temperature. The sperm density of half of animals in the testis temperature 43 ℃ group decreased obviously, but the maintenance time was shorter and the birth control effect was not ideal. Testis temperature 44 ℃ group, at 20 minutes irradiation, regardless of irradiation 1 or 2 times, all experimental animals, sperm density decreased significantly, 15-19 days after irradiation can be reduced to 30 million / ml or less, to maintain low Horizontal irradiation time sub-group at about 23 days, twice irradiation sub-group about 37 days. This group at the end of the experiment, the average sperm density and testicular histological changes are better recovery, is the effective temperature of birth control. Testis temperature 46 ℃ group