References
1. Amaral S, Lombardi RA, Medeiros H, Nogueira A, Gadsden J. Superior Trunk Block Is an Effective Phrenic-Sparing Alternative to Interscalene Block for Shoulder Arthroscopy: A Systematic Review and Meta-Analysis. *Curēus (Palo Alto, CA).* 2023;15(11):e48217. doi:10.7759/cureus.48217.
2. Diwan S, Sethi D, Kamath N, Nair A. Low-volume C5-6 interscalene and supraclavicular nerve blocks for arthroscopic shoulder surgery: A case series. *J Anaesthesiol Clin Pharmacol.* 2021;37(4):661-664. doi:10.4103/joacp.JOACP_438_20.
3. Ferré F, Pommier M, Laumonerie P, et al. Hemidiaphragmatic paralysis following ultrasound‐guided anterior vs. posterior suprascapular nerve block: a double‐blind, randomised control trial. *Anaesthesia.* 2020;75(4):499-508. doi:10.1111/anae.14978.
4. Kim H, Han JU, Lee W, et al. Effects of Local Anesthetic Volume (Standard Versus Low) on Incidence of Hemidiaphragmatic Paralysis and Analgesic Quality for Ultrasound-Guided Superior Trunk Block After Arthroscopic Shoulder Surgery. *Anesth Analg.* 2021;133(5):1303-1310. doi:10.1213/ANE.0000000000005654.
5. Lee BH, Qiao WP, McCracken S, Singleton MN, Goman M. Regional Anesthesia Techniques for Shoulder Surgery in High-Risk Pulmonary Patients. *J Clin Med.* 2023;12(10):3483. doi:10.3390/jcm12103483.
6. Lim JA, Lim H, Lee JH, et al. Local anesthetic volume in ultrasound-guided interscalene block and opioid consumption during shoulder arthroscopic surgery: A retrospective comparative study. *Medicine (Baltimore).* 2021;100(27):e26527. doi:10.1097/MD.0000000000026527.
7. Oliver‐Fornies P, Gomez Gomez R, Ortega Lahuerta JP, et al. A randomised controlled trial in patients undergoing arthroscopic shoulder surgery comparing interscalene block with either 10 ml or 20 ml levobupivacaine 0.25. Anaesthesia. 2022;77(10):1106-1112. doi:10.1111/anae.15822
8. Riazi S, Carmichael N, Awad I, Holtby RM, McCartney CJ. Effect of local anaesthetic volume (20 vs 5 ml) on the efficacy and respiratory consequences of ultrasound-guided interscalene brachial plexus block. *Br J Anaesth.* 2008;101(4):549-556. doi:10.1093/bja/aen229.
9. Taha AM, Yurdi NA, Elahl MI, Abd‐Elmaksoud AM. Diaphragm‐sparing effect of the infraclavicular subomohyoid block vs low volume interscalene block. A randomized blinded study. *Acta Anaesthesiol Scand.* 2019;63(5):653-658. doi:10.1111/aas.13322.
10. Tedore TR, Lin HX, Pryor KO, et al. Dose–response relationship between local anesthetic volume and hemidiaphragmatic paresis following ultrasound-guided supraclavicular brachial plexus blockade. *Reg Anesth Pain Med.* 2020;45(12):979-984. doi:10.1136/rapm-2020-101728.
