4D peripheral UltrasonographyWe present a standardized method for using four-dimensional ultrasound (4D US) guidance for peripheral nerve blocks. 4D US allows for needle tracking in multiple planes simultaneously and accurate measurement of the local anesthetic volume surrounding the nerve following injection. Additionally, the morphology and proximity of local anesthetic spread around the target nerve are clearly seen with the described technique. This method provides additional spatial information in real-time compared to standard two-dimensional ultrasound.
Expectant mothers that are full-figured should consider scheduling their 3D/4D ultrasound between 28 and 32 weeks of pregnancy. If you are expecting twins or multiples, the best time for 3D/4D ultrasound is between 22-27 weeks.