Journal of Anesthesia

, Volume 25, Issue 6, pp 923–926 | Cite as

Ultrasound guided obturator nerve block: a single interfascial injection technique

  • Seong Heon Lee
  • Cheol Won Jeong
  • Hyun Jung Lee
  • Myung Ha Yoon
  • Woong Mo KimEmail author
Clinical Report


We describe a new technique of single interfascial injection for 25 patients scheduled for transurethral bladder tumor resection. An ultrasound probe was placed at the midline of inguinal crease and moved medially and caudally to visualize the fascial space between the adductor longus (or pectineus) and adductor brevis muscles. We injected 20 mL 1% lidocaine containing epinephrine into the interfascial space using a transverse plane approach to make an interfascial injection, not an intramuscular swelling pattern. And just distally, firm pressure was applied for 3 min. Afterwards, surgery was performed under spinal anesthesia. The time required for identification and location of the nerve was 20 ± 15 and 30 ± 15 s, respectively. Adductor muscle strength, which was measured with a sphygmomanometer, decreased in all patients, from 122 ± 26 mmHg before blockade to 63 ± 11 mmHg 5 min after blockade. No movement or palpable muscle twitching occurred in 23 cases, slight movement of the thigh not interfering with the surgical procedure was observed in 1 case, thus the obturator reflex was successfully inhibited in 96% of cases. Ultrasound-guided single interfascial injection is an easy and successful technique for obturator nerve block.


Obturator nerve block Obturator reflex Ultrasound technique 


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Copyright information

© Japanese Society of Anesthesiologists 2011

Authors and Affiliations

  • Seong Heon Lee
    • 1
  • Cheol Won Jeong
    • 1
  • Hyun Jung Lee
    • 1
  • Myung Ha Yoon
    • 1
  • Woong Mo Kim
    • 1
    Email author
  1. 1.Department of Anesthesiology and Pain MedicineChonnam National University Medical SchoolGwang-JuKorea

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