My understanding is that angle correction is only required where an absolute value is required e.g. PSV in the MCA but not for a ratio e.g. S/D, PI or RI. Current guidance does not comment on angle correction for uterine artery doppler acquisition.
That's correct! Angle correction is required only where an absolute valocity is required
In cases of measurement of Peak Systolic Velocity in MCA för prediction of fetal anemia angle should be zero (or must be corrected). Semiquantitative parameters like Pulsatility Index or Resistance Index in any arteries are not dependant on angle.
So Uterine Artery Doppler doesn't need angle correction. However it is more important to find the main uterine artery. PSV in uterine artery should be at least 60cm/sec. If it is less this is not uterine artery.
Correct! There is no angle guidance.
But AUD should be performed on the booth side it is more than important and recommanded to observe other parameters such umb. art. and DVPI.
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