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Sonographically guided obturator internus injections: techniques and validation.

Jay Smith¹, Steve J Wisniewski, Michael K Wempe

¹Department of Physical Medicine and Rehabilitation, W14, Mayo Clinic College of Medicine, E10, Mayo Building, 200 First St SW, Rochester, MN 55905, USA. smith.jay@mayo.edu

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine

|September 27, 2012

Summary

This summary is machine-generated.

Sonographically guided injections into the obturator internus (OI) muscle or bursa are feasible. This technique may aid in diagnosing and managing gluteal pain syndromes.

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Area of Science:

Musculoskeletal imaging
Interventional radiology
Anatomy

Background:

Gluteal and retrotrochanteric pain syndromes are common clinical challenges.
Accurate diagnosis and targeted treatment are crucial for patient outcomes.
The obturator internus (OI) muscle and bursa are potential pain generators in this region.

Purpose of the Study:

To describe and validate sonographically guided injection techniques for the obturator internus (OI) muscle and bursa.
To assess the feasibility and accuracy of these procedures in a cadaveric model.

Main Methods:

Ten sonographically guided OI injections were performed in 5 unembalmed cadaveric pelvis specimens.
Four techniques were utilized: OI tendon sheath, OI intramuscular, OI bursa trans-tendinous, and OI bursa short-axis.
Latex was injected under sonographic guidance, followed by dissection to evaluate injectate placement.

Main Results:

All 10 injections accurately placed latex into the intended target sites (OI muscle or bursa).
Specific techniques showed high accuracy, with minimal or no extra-articular/extra-muscular spread.
No adverse events, such as injury to nearby nerves or vessels, were observed.

Conclusions:

Sonographically guided injections into the obturator internus (OI) muscle or bursa are technically feasible.
These validated techniques offer a potential tool for diagnosing and managing gluteal and retrotrochanteric pain.