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Wu WT, Mezian K, Naňka O, Chen LR, Ricci V, Lin CP, Chang KV, Özçakar L. Enhancing diagnosis and treatment of superior cluneal nerve entrapment: cadaveric, clinical, and ultrasonographic insights. Insights Imaging 2023; 14:116. [PMID: 37395948 DOI: 10.1186/s13244-023-01463-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/10/2023] [Indexed: 07/04/2023] Open
Abstract
OBJECTIVES Low back pain is a prevalent public health issue caused by superior cluneal nerve (SCN) entrapment. This study aimed to explore the course of SCN branches, cross-sectional area (CSA) of the nerves, and effects of ultrasound-guided SCN hydrodissection. METHODS SCN distance relative to the posterior superior iliac spines was measured and compared with ultrasound findings in asymptomatic volunteers. The CSA of the SCN, pressure-pain threshold, and pain measurements were obtained from asymptomatic controls and patients with SCN entrapment at various time points after hydrodissection (with 1 mL of 50% dextrose, 4 mL of 1% lidocaine, and 5 mL of 1% normal saline) in the short-axis view. RESULTS Twenty sides of 10 formalin-fixed cadavers were dissected. The SCN locations on the iliac crest did not differ from the ultrasound findings in 30 asymptomatic volunteers. The average CSA of the SCN across different branches and sites ranged between 4.69-5.67 mm2 and did not vary across different segments/branches or pain statuses. Initial treatment success was observed in 77.7% (n = 28) of 36 patients receiving hydrodissection due to SCN entrapment. A group with initial treatment success experienced symptom recurrence in 25% (n = 7) of cases, and those with recurrent pain had a higher prevalence of scoliosis than those without symptom recurrence. CONCLUSIONS Ultrasonography effectively localizes SCN branches on the iliac crest, whereby increased nerve CSA is not useful for diagnosis. Most patients benefit from ultrasound-guided dextrose hydrodissection; however, those with scoliosis may experience symptom recurrence and whether structured rehabilitation can reduce recurrence post-injection should be considered as one perspective in future research. Trial registration ClinicalTrials.gov (NCT04478344). Registered on 20 July 2020, https://clinicaltrials.gov/ct2/show/NCT04478344?cond=Superior+Cluneal+Nerve&cntry=TW&draw=2&rank=1 . Critical relevance statement Ultrasound imaging accurately locates SCN branches on the iliac crest, while enlargement of the CSA is not useful in diagnosing SCN entrapment; however, approximately 80% of SCN entrapment cases respond positively to ultrasound-guided dextrose hydrodissection.
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Affiliation(s)
- Wei-Ting Wu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, No. 87, Nei-Jiang Rd., Wan-Hwa District, Taipei, Taiwan
- Department of Physical Medicine and Rehabilitation, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Kamal Mezian
- Department of Rehabilitation Medicine, Charles University, First Faculty of Medicine and General University Hospital in Prague, Prague, Czech Republic
| | - Ondřej Naňka
- Institute of Anatomy, Charles University, First Faculty of Medicine, Prague, Czech Republic
| | - Lan-Rong Chen
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, No. 87, Nei-Jiang Rd., Wan-Hwa District, Taipei, Taiwan
| | - Vincenzo Ricci
- Physical and Rehabilitation Medicine Unit, Luigi Sacco University Hospital, ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Chih-Peng Lin
- Department of Anesthesiology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ke-Vin Chang
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, No. 87, Nei-Jiang Rd., Wan-Hwa District, Taipei, Taiwan.
- Department of Physical Medicine and Rehabilitation, National Taiwan University College of Medicine, Taipei, Taiwan.
- Center for Regional Anesthesia and Pain Medicine, Wang-Fang Hospital, Taipei Medical University, Taipei, Taiwan.
| | - Levent Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
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A simple and novel ultrasound-guided approach for superior cluneal nerves block. Anaesth Crit Care Pain Med 2021; 40:100838. [PMID: 33757913 DOI: 10.1016/j.accpm.2021.100838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 11/23/2022]
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Ricci V, Özçakar L. Ultrasound Imaging for the Medial Branches of the Superior Cluneal Nerve: Optimal Visibility at the "Fatty Tunnel". Pain Pract 2019; 20:338-339. [PMID: 31677220 DOI: 10.1111/papr.12852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincenzo Ricci
- Physical and Rehabilitation Medicine Unit, Department of Biomedical and Neuromotor Science, IRCCS Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Levent Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
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