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Obturator canal block: an anatomical study.

Hipolito Labandeyra1,2, Pierre Goffin3,4, Rita Riera5

  • 1Human Anatomy and Embryology Unit, Universitat de Barcelona Facultat de Medicina i Ciències de la Salut, Barcelona, Catalunya, Spain.

Regional Anesthesia and Pain Medicine
|November 3, 2024
PubMed
Summary
This summary is machine-generated.

This study evaluated ultrasound-guided obturator nerve blocks using the iliopubic ramus landmark. The approach successfully stained the obturator nerve, demonstrating its potential for effective pain management.

Keywords:
Nerve BlockOrthopedic SurgeryPain, PostoperativePeripheral NervesREGIONAL ANESTHESIA

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Area of Science:

  • Anatomy
  • Regional Anesthesia
  • Ultrasound Guidance

Background:

  • Obturator nerve blocks are crucial for hip and thigh surgery.
  • Existing techniques lack focus on the obturator canal exit.
  • Anatomical evaluation of a novel injection point is needed.

Purpose of the Study:

  • To anatomically evaluate ultrasound-guided obturator nerve block at the obturator canal exit.
  • To detail anatomical landmarks and solution distribution for this block.

Main Methods:

  • Cadaveric study (10 cadavers, 20 hemipelvises).
  • Ultrasound identification of anatomical structures.
  • Methylene blue injection and dissection to assess dye spread.

Main Results:

  • Consistent staining of obturator nerve trunk and anterior branch (100%).
  • Posterior branch staining in 80% of samples.
  • Intrapelvic spread observed in 65%.

Conclusions:

  • Sagittal approach utilizing the iliopubic ramus is effective for obturator nerve blocks.
  • The study details structures around the obturator canal exit.
  • Further research is required to confirm safety and efficacy.