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. 2025 Sep;69(9):960-962.
doi: 10.4103/ija.ija_459_25. Epub 2025 Aug 12.

Femoral rami obturator nerve trunk (FRONT) block in intramedullary nailing surgery: A motor-sparing approach to anterior hip analgesia

Francesco Marrone  1 , Tommaso Sorrentino  2 , Giovanni Cosco  2 , Saverio Paventi  1
Affiliations

Femoral rami obturator nerve trunk (FRONT) block in intramedullary nailing surgery: A motor-sparing approach to anterior hip analgesia

Francesco Marrone et al. Indian J Anaesth. 2025 Sep.
No abstract available

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
(a) Procedural setup for the FRONT block: Skin markings indicate the pre-block identification of the lateral femoral cutaneous nerve and the anterior superior iliac spine (ASIS) using a low-frequency transducer. The injection is then performed following the method described by Jessen, positioning the probe infrainguinally approximately 6–7 cm distal and 2 cm medial to the anterior superior iliac spine (ASIS). (b) and (c): Ultrasound image of the infrainguinal region: The FRONT block achieves anterior hip analgesia using a single needle approach with a dual injection technique. The injection site is not on the same ultrasound plane as the probe is tilted to identify two distinct planes: the subpectineal interfascial plane (1, yellow arrow) and the iliopsoas plane (2, red arrow). Ultrasound guidance is essential for precision. Note that the femoral nerve is located around 1.5 cm from the hip capsule. Needle trajectory and injectate spread are shown. A = artery; FH = femoral head and surrounding capsule; FN = femoral nerve; IP = iliopsoas muscle; LA = local anaesthetic; OE = obturator externus muscle; PECT = pectineus muscle; V = vein
See this image and copyright information in PMC

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