IS THE USE OF DOPPLER FOR FETAL ULTRASOUND AT 13 + 6 WEEKS SAFE?

ISUOG statement on the safe use of Doppler for fetal ultrasound examination in the first 13 + 6 weeks of pregnancy.

ISUOG statement on the safe use of Doppler for fetal ultrasound examination in the first 13 + 6 weeks of pregnancy.

The fetal period commences at 11 weeks (after the last menstrual period; corresponding to a crown-rump length ≥ 45 mm). By this stage, organogenesis is complete and the fetal–placental circulation is established.

From 11 + 0 to 13 + 6 weeks, spectral Doppler, color flow imaging, power imaging, and other Doppler ultrasound modalities may be used routinely for certain clinical indications, such as screening for trisomy and cardiac anomalies.

When performing Doppler ultrasound, the displayed thermal index (TI) should be ≤ 1.0, and exposure time should be kept as short as possible (usually no longer than 5–10 min).

ISOUG Doppler for fetal ultrasound
Source: ISOUG

Read more: https://obgyn.onlinelibrary.wiley.com/doi/10.1002/uog.23610?fbclid=IwAR0obhtYtLgGho7QX-EQ9MEtKrvfXjnIx036_Y71XU0Bs6AqFBlW-x6-BtY


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