Trial reportBMC anesthesiology2026
Impact of interscalene versus superior trunk blocks as sole anesthetics on respiratory outcomes for shoulder arthroscopy: a randomized controlled trial.
Trial report in BMC anesthesiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06703281 (Comparison of the Effects of Interscalene Block and Superior Trunk Block on Pulmonary Functions for Shoulder Arthroscopic Surgery Patients), which is not on this map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Comparison of the Effects of Interscalene Block and Superior Trunk Block on Pulmonary Functions for Shoulder Arthroscopic Surgery Patients
Who cites it
2 citing papers in PubMed.
- Ultrasound-Guided Infraspinatus-Teres Minor Interfascial Block versus Interscalene Brachial Plexus Block for Analgesia After Arthroscopic Shoulder Surgery: A Randomized Non-Inferiority Clinical Trial.Drug design, development and therapy · 2026Trial
- Feasibility and Adoption of Low-Volume Ultrasound-Guided Superior Trunk Block for Shoulder Reduction in the Emergency Department.Journal of clinical medicine · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe interscalene block (ISB) provides effective analgesia for shoulder surgery but commonly results in hemidiaphragmatic paralysis (HDP). The superior trunk block (STB) is an alternative technique to reduce this complication while maintaining effective analgesia. This randomized trial compared ISB and STB used as sole anesthetic techniques, without general anesthesia, for shoulder arthroscopy, focusing on diaphragmatic excursion, spirometry, and clinical respiratory outcomes.
methodsThis prospective randomized observer-blinded study included 123 patients allocated to either ISB (n = 62) or STB (n = 61) groups. The diaphragmatic excursion (DE) was assessed using ultrasound, and forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) were determined by spirometry before and after the block. The time to the first postoperative analgesic requirement was recorded.
resultsThe DE, FEV1, FVC, and FEV1/FVC reductions were significantly lower in the STB group (p < 0.05). The HDP incidence was lower in the STB (p < 0.01) when compared to the ISB group. Both groups demonstrated comparable analgesia.
conclusionThe STB provides analgesia with less respiratory complications compared to the ISB, making it a favorable choice for patients at risk of pulmonary compromise.
trial registrationClinicalTrials.gov identifier: NCT06703281. Date: 11/21/2024. ESAIC Mentorship Programme ID: ESAIC_MSP_2024_BB.
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