Fig. 7.

(A) Schematic diagram to show the position of the ultrasound probe. The probe (a) is placed above and 3 finger breadth lateral to the anterior superior iliac spine and is in the short axis of the course of ilioinguinal nerve (i.e. at right angle to the iliac crest). The probe (b) is placed in the inguinal line in long axis of femoral and external iliac artery. (B) Figure showing the three layers of muscles and the fasica split (white line arrows) with the ilioinguinal and iliohypogastric nerves inside. Solid triangles outline the iliac crest. (C) Similar to figure 7b with Doppler showing the deep circumflex iliac artery. EO: external oblique muscle, IO: internal oblique muscle, TA: transverse abdominus muscle, IL: iliacus, F: adipose tissue, Lat: lateral. Reproduced with permission from USRA (www.usra.ca).