有关诊断剂量超声波对胎儿是否有潜在性损伤的问题一直存在着争议。在本研究中,用甲氧氟烷麻醉体重约250g的Sprague-Dawley孕鼠,然后置于37℃水槽中。用超声对怀孕15天的大鼠子宫一角,声束截面为0.8×3.5cm~2;入射声强为1.5w/cm~2[SPTA],占空乩为50％,胁冲频率为2.5MHz,脉宽为10μs,重复频率为50KHz,辐照30分钟。在辐照期间,用YSI22温度计记录的母 There has been controversy over the potential damage to the fetus of diagnostic doses of ultrasound. In the present study, Sprague-Dawley pregnant rats weighing about 250 g were anesthetized with metoprolol and then placed in a 37 ° C water bath. The angle of sound beam was 0.8 × 3.5cm ~ 2 at the tip of uterus of 15-day-old pregnant rats. The incident sound intensity was 1.5w / cm ~ 2 [SPTA] , Pulse width of 10μs, repetition frequency of 50KHz, irradiation for 30 minutes. During irradiation, the YSI22 thermometer recorded the mother