低频超声终止妊娠的实验研究

目的探讨低频超声止孕可能性。方法低频聚焦超声(353 kHZ)6种声强直接照射妊娠第10 d兔胚胎,10 d后观察胚胎死亡率,并用免疫组化法检测胎盘组织细胞p53的变化。结果声强30 W/cm2、35 W/cm2及≥40 W/cm2组的胚胎死亡率分别为25.00%、72.88%和100%;照射后胎盘组织细胞p53表达增加,96 h升至最高点,192 h接近对照组水平。结论低频超声抗孕具有可行性,可诱导胎盘组织细胞p53表达增加,但具有可恢复性。

Experimental study of early gestation termination induced by low frequency ultrasound

Objective To investigate the availability of early gestation termination with low frequency ultrasound.Methods The 10th day rabbit embryos were irradiated with low frequency focused ultrasound of 6 different levels of sound intensity.The rates of embryonic mortality were observed and the expression of p53 was detected by using immunohistochemistry 10 days after the irradiating.Results The rates of embryonic mortalities were 25.00%,72.88 % and 100% with the intensity of 30 W/cm~2,35 W/cm~2 and 40 W/cm~2 for 60 seconds,respectively.The expression of p53 in placenta cells increased after irradiating,peaked at 96 hours,and recovered to control level at 192 hours.Conclusion It is feasible for early pregnancy termination with low frequency ultrasound.The low frequency ultrasound may induce the increased expression of p53 in placenta cells,but the expression may be recovered.