• Dong-wook Rha, Sang-Hee Lee, Hyung-Jin Lee, You-Jin Choi, Hee-Jin Kim, and Sang Chul Lee.
• Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, South Korea.
• Pain Physician. 2015 Nov 1; 18 (6): E1111-7.

BackgroundThe close anatomic and functional relationship between the proximal parts of the adductor longus and pectineus muscles produce considerable overlap in symptoms and signs in the inguinal region. To our knowledge, there have been no publications of ultrasound (US)-guided injection techniques into the 2 muscles.ObjectiveThis study sought to describe US-guided injection techniques in the proximal part of the adductor longus and pectineus muscles and to validate whether these techniques deliver injections appropriately to their target muscles in unembalmed cadavers.Study DesignCadaveric study.MethodsA preliminary trial with 2 unembalmed cadavers provided information on the target sonographic structures of proximal adductor longus and pectineus muscles. Bilateral US-guided intramuscular injections in the proximal adductor longus and pectineus were performed using the remaining 5 unembalmed male cadavers. To avoid confusion of dye location, we did not inject into both the adductor longus and pectineus muscle in the same side. After injections, each specimen was dissected to evaluate the accuracy of injection.ResultsTen injections (5 for the adductor longus muscle and 5 for the pectineus muscle) were performed targeting the proximal parts of muscles in 5 cadaveric specimens. All injections were successful and blue dye was injected accurately at the target area within the adductor longus and the pectineus muscles. No other muscles were injected unintentionally. There were no accidental penetrations and/or injuries at adjacent neurovascular structures as well.LimitationDespite successful injection of the proximal parts of adductor longus and pectineus, this study did not verify the usefulness of this technique in clinical practice.ConclusionsThe results of this study may play a role in the diagnosis and management of patients presenting with chronic pelvic pain syndrome and sports hernia.

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