Background: The shoulder and its joint are very important parts of the human body. The shoulder is very important for a vertical body position and cosmetic appearance particularly in women. The shoulder joint has the largest motion range of all joints in the human body. There are some shoulder surgery procedures such as diagnostic arthroscopy, subacromial disorders (impingement syndrome, rotator cuff defects and ruptures, periarthritis humeroscapularis, tendinopathy) and arthroscopic subacromial decompression). All of these shoulder procedures need anesthesia and analgesia. Adequate pain relief after the surgical procedures of shoulder is necessary both for the comfort of the patients and for an early use of rehabilitation exercises. The management of acute postoperative pain after shoulder surgery has been performed using conventional nonsteroidal anti-inflammatory drugs (NSAIDs), local injection of analgesics, i.v. patient-controlled analgesia (PCA), continuous intrabursal infusion of analgesics, and patient-controlled interscalene or subacromial analgesia. ISO (infraclavicular-subomohyoid) block, subscapularis subomohyoid block block a recent techniques used to block BP cords and the suprascapular nerve, was also described to provide adequate shoulder analgesia while reducing phrenic nerve injury incidence.