Figure 9.

Parasagittal/longitudinal view and in-plane approach within the hypoechoic triangle. (A) Parasagittal/longitudinal (novel approach) view showing adjacent segments of the rectus abdominis (RA) on one side, the tendinous intersection (TI) between the two segments, and the underlying hypoechoic triangle (HT). The boundaries of this real space (as opposed to the potential space in the traditional approach) are a thin fascial layer enveloping the rectus abdominis muscle (F) and the double layer forming its base (transversus abdominis [TA] and peritoneum [P]). (B) In-plane approach with needle tip placement. The bidirectional pattern of spread and the crescent-shaped appearance of the injectate within the hypoechoic triangle are shown. (Reproduced from Thind et al¹⁴ © Wolters Kluwer Health, Inc. Distributed under the terms of the Creative Commons Attribution License, CC BY 4.0).