از بعضی از کاربرای محترم که کمال احترام رو نثار بنده کردند سپاسگزارم
بیاییم و برای بحث کردن جنبه و تحمل بالاتری داشته باشیم
از اعضای محترم سایت کسی هست که زبان انگلیسی ش خوب باشه و این متن رو ترجمه کنه و نتیجه رو توی تاپیک بزاره تا همه استفاده کنیم؟؟
Risks of Ultrasound: Safety Concern
The only ultrasound safety concern that has been raised to any significant degree is in the case of fetal ultrasound. Is ultrasound safe for the developing fetus? The risks of ultrasound during pregnancy are largely unknown because few large-scale studies have addressed this question in depth. Of those studies that have looked at obstetric ultrasound safety, most occurred two or more decades ago when scanning intensities were a fraction of what is used today. Therefore, prior studies suggesting that ultrasound is not dangerous for an unborn baby may bear no relation to current fetal ultrasound practices. Some studies suggest the procedure may contribute to slower fetal growth and other problems while others show that routine prenatal ultrasound provides no benefit in normal pregnancies and may lead to a high number of babies being falsely diagnosed as high-risk. This scenario leads to a cycle of over-testing and elevated stress for the mother other family members in cases that would otherwise be treated as normal pregnancies.
Particular concern has been raised about the effects of Doppler ultrasound on an unborn baby because Doppler uses continuous waves rather than intermittent pulses and thus causes greater exposure when compared with conventional ultrasound. Potentially more dangerous is the increasing prevalence of so-called keepsake ultrasounds. Keepsake ultrasounds use 3d and 4d ultrasound imaging not for medical purposes but for emotional and personal reasons, that is, to view and take pictures of an unborn baby and to determine its gender. Proponents claim that this bonding experience can increase healthy outcomes by motivating mothers to take better care of themselves during pregnancy. However, the fact remains that the long exposure times used in 3d and 4d keepsake ultrasounds have not been adequately studied for safety risks to the unborn baby.
Given these unknown safety risks and the fact that routine ultrasound for healthy pregnancies provides no benefit and may lead to unnecessary medical intervention, some experts have made the commonsense recommendation to avoid routine prenatal ultrasounds and use the procedure only when a problem arises that may warrant further investigation. Another way to lower risk is to minimize exposure time and intensity by using a skilled sonographer and by avoiding Doppler ultrasound if possible, especially early in pregnancy.
اینم لینک:
http://www.ultrasoundtechniciancenter.org/ultrasound-knowledge/risks-benefits-future.html