Prospective Observational Study on the Analgesic Effectiveness of Blocking the Suprascapular and Axillary Nerves in Shoulder Arthroscopy.

Inclusion Criteria: * Patients over 18 years of age. * ASA (Physical Status Classification System) I - III. * Having been scheduled for shoulder arthroscopy surgery. Exclusion Criteria: Any contraindication for performing regional anesthetic techniques: * Infection at the puncture point. * Alteration of hemostasis. * Allergy to local anesthetics. * Patient refusal to participate in the study. * Inability to evaluate postoperative pain. * Known neuropathy of the operated limb. * Patients who required conversion to open surgery.