Review Article
Ultrasound-Guided Obturator Nerve Block: A Focused Review on Anatomy and Updated Techniques
Table 1
Technical differences in ultrasound-guided obturator nerve block techniques.
| ā | Soong et al. [38] Fujiwara et al. [39] Sinha et al. [30] | Akkaya et al. [35] | Anagnostopoulou et al. [17] Taha [23] | Lin et al. [42] | Yoshida et al. [31] |
| Ultrasound probe orientation | In-plane | In-plane | Out-of-plane | In-plane | In-plane | Transducer position | Inguinal crease | Pubic region | Inguinal crease | Inguinal crease | Medial thigh | Transducer tilt | Not required | Not required | Required | Required | Not required | Needle-ultrasound beam angle | Small (posterior branch) | Small | NA | Small | Large | Nerve stimulation guidance | Recommended | Recommended | Not needed | Not needed | Not needed | Patient position | Supine | Supine | Supine | Supine | Lithotomy |
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NA, not applicable.
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