In proximal medial thigh, it divides into anterior and posterior division and supplies adductor muscles
Anterior division travels between adductor longus and adductor brevis muscles
Posterior division travels between adductor brevis and adductor magnus muscles
Responsible innervation to hip joint at inferior femoral neck, pubic ramus, medial femoral shaft, and its medial condyle
Sensory innervation to midinner thigh and posterior knee joint
Renders anesthesia for 6-12 hours
Steroids can be added to anesthetic solution in cases where component of entrapment or inflammation is suspected
Provides somatic pain coverage
PREPROCEDURE
Indications
Contraindications
Getting Started
PROCEDURE
Patient Position/Location
Equipment Preparation
Procedure Steps
Findings and Reporting
Alternative Procedures/Therapies
POST PROCEDURE
Expected Outcome
Things to Do
Things to Avoid
OUTCOMES
Problems
Complications
Selected References
Nielsen ND et al: An obturator nerve block does not alleviate postoperative pain after total hip arthroplasty: a randomized clinical trial. Reg Anesth Pain Med. ePub, 2019
Tran DQ et al: Lower extremity regional anesthesia: essentials of our current understanding. Reg Anesth Pain Med. ePub, 2019
Bareka M et al: Superior perioperative analgesia with combined femoral-obturator-sciatic nerve block in comparison with posterior lumbar plexus and sciatic nerve block for ACL reconstructive surgery. Knee Surg Sports Traumatol Arthrosc. 26(2):478-84, 2018
House CV et al: CT-guided obturator nerve block via the posterior approach. Skeletal Radiol. 35(4):227-32, 2006
Choquet O et al: A new inguinal approach for the obturator nerve block: anatomical and randomized clinical studies. Anesthesiology. 103(6):1238-45, 2005
Heywang-Köbrunner SH et al: CT-guided obturator nerve block for diagnosis and treatment of painful conditions of the hip. Eur Radiol. 11(6):1047-53, 2001
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
KEY FACTS
Terminology
Preprocedure
Procedure
Post Procedure
Outcomes
TERMINOLOGY
Abbreviations
Obturator nerve (ON)
Obturator nerve block (ONB)
Definitions
Blockade of ON
Arises from anterior rami of L2-L4 nerve roots from lumbar plexus within psoas major muscle
Emerges from psoas major medial into pelvis and then along obturator canal (accompanied by vessels) to reach medial thigh compartment
In proximal medial thigh, it divides into anterior and posterior division and supplies adductor muscles
Anterior division travels between adductor longus and adductor brevis muscles
Posterior division travels between adductor brevis and adductor magnus muscles
Responsible innervation to hip joint at inferior femoral neck, pubic ramus, medial femoral shaft, and its medial condyle
Sensory innervation to midinner thigh and posterior knee joint
Renders anesthesia for 6-12 hours
Steroids can be added to anesthetic solution in cases where component of entrapment or inflammation is suspected
Provides somatic pain coverage
PREPROCEDURE
Indications
Contraindications
Getting Started
PROCEDURE
Patient Position/Location
Equipment Preparation
Procedure Steps
Findings and Reporting
Alternative Procedures/Therapies
POST PROCEDURE
Expected Outcome
Things to Do
Things to Avoid
OUTCOMES
Problems
Complications
Selected References
Nielsen ND et al: An obturator nerve block does not alleviate postoperative pain after total hip arthroplasty: a randomized clinical trial. Reg Anesth Pain Med. ePub, 2019
Tran DQ et al: Lower extremity regional anesthesia: essentials of our current understanding. Reg Anesth Pain Med. ePub, 2019
Bareka M et al: Superior perioperative analgesia with combined femoral-obturator-sciatic nerve block in comparison with posterior lumbar plexus and sciatic nerve block for ACL reconstructive surgery. Knee Surg Sports Traumatol Arthrosc. 26(2):478-84, 2018
House CV et al: CT-guided obturator nerve block via the posterior approach. Skeletal Radiol. 35(4):227-32, 2006
Choquet O et al: A new inguinal approach for the obturator nerve block: anatomical and randomized clinical studies. Anesthesiology. 103(6):1238-45, 2005
Heywang-Köbrunner SH et al: CT-guided obturator nerve block for diagnosis and treatment of painful conditions of the hip. Eur Radiol. 11(6):1047-53, 2001
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