Adhesive capsulitis — popularly called “frozen shoulder” — is one of the most disabling musculoskeletal conditions, characterized by intense pain, progressive stiffness, and significant loss of shoulder range of motion. A large-scale network meta-analysis published in Frontiers in Medicine in November 2025 pooled 84 randomized clinical trials and 7,125 patients to systematically compare 17 different acupuncture-based interventions — providing, for the first time, a comprehensive efficacy ranking for this condition.
Conducted by Ji, Huang, Weng, Zhang, and colleagues, the study performed searches in national and international databases including PubMed, Cochrane, Embase, CNKI, and Wanfang. The interventions evaluated included conventional manual acupuncture, electroacupuncture, moxibustion, small needle-knife therapy, floating needle, joint mobilization combined with warm-needle moxa, auricular acupuncture, trigger-point acupuncture, plus combinations of these techniques with rehabilitation or conventional medication.
MAIN RESULTS — NETWORK META-ANALYSIS (84 RCTS, 7,125 PATIENTS)
Methodology: Bayesian network meta-analysis
Network meta-analysis (NMA) is the most advanced methodologic standard for multiple treatment comparisons. Unlike conventional pairwise meta-analyses, NMA allows interventions that have never been tested head-to-head in the same trial to be compared indirectly — provided that both have been compared with a common control. The researchers used the Bayesian approach with a random-effects model, calculating SUCRA (Surface Under the Cumulative Ranking Curve) rankings for each intervention in each outcome. The primary outcomes were overall efficacy (treatment response rate), complete cure rate, and shoulder function (validated scales such as Constant-Murley, DASH, and UCLA).
Outcome rankings: each intervention has its profile
One of the most relevant findings of the NMA is that no intervention dominates in all outcomes simultaneously — each modality has its efficacy profile. For overall efficacy (treatment response rate), the small needle-knife took first place with RR=1.39 (95% CI 1.21–1.60), followed by floating needle and electroacupuncture combined with mobilization. For complete cure rate, joint mobilization associated with warm-needle moxa showed the best performance with RR=1.83 (95% CI 1.19–2.83), suggesting that therapeutic heat and mechanical mobilization together potentiate the resolution of capsular adhesions. For shoulder function, the floating needle outperformed all others with SMD=3.12 (95% CI 1.91–4.33) — exceptionally large effect magnitude, even considering possible methodologic variance among the studies.
Floating needle: differentiated mechanism for soft tissues
The floating needle is a technique developed in the 1990s by Dr. Fu Zhong-Hua, which uses a special needle inserted superficially in the subcutaneous tissue — without penetrating muscle — followed by sweeping movements of the cannula. The proposed mechanism involves modulation of the superficial fascial connective tissue and release of myofascial trigger points without deep muscle stimulation. For frozen shoulder, where myofascial restriction and trigger points in the rotator cuff muscles contribute significantly to pain and stiffness, this mechanism may explain the superior performance in functional recovery. The SMD of 3.12 places the floating needle in the “large” effect category according to Cohen’s taxonomy, although it is fundamental to interpret this datum with caution given the limited number of studies available for this specific technique.
Frequently Asked Questions
The studies included in this NMA used protocols ranging from 4 to 12 weeks, with typical frequency of 2 to 3 sessions per week. Adhesive capsulitis naturally tends to resolve spontaneously in 1 to 3 years, but evidence suggests that acupuncture may accelerate part of this process — especially in pain reduction and functional recovery. For chronic cases with more than 6 months of evolution, longer protocols of 8 to 12 weeks with combined techniques tend to produce better results.
When performed by a physician with adequate training, the small needle-knife has an acceptable safety profile. Risks include ecchymosis, local bleeding, infection (rare with adequate sterile technique) and, in inexperienced hands, injury to vascular and nerve structures. The technique requires precise knowledge of shoulder anatomy, the use of sterile and disposable instruments, and specific training of the executing professional.
Yes — impingement syndrome, rotator cuff injury, glenohumeral arthritis, and cervical radiculopathy may mimic adhesive capsulitis. The defining characteristic of frozen shoulder is restriction of motion in all planes (including passive external rotation), unlike rotator cuff injuries that generally preserve passive rotation. Ultrasonography and magnetic resonance imaging assist in differential diagnosis. The physician should confirm the diagnosis before initiating any intervention, since therapeutic approaches differ substantially among these conditions.
Founded in 1989 by physicians trained at the University of São Paulo (USP) and specialized in China, CEIMEC is a Brazilian national reference in the teaching and practice of medical acupuncture. With more than 3,000 physicians trained over 35 years, it collaborates with HC-FMUSP and is recognized by the Brazilian Medical College of Acupuncture (CMBA/AMB).