**5. Postoperative analgesic techniques**

In the immediate postoperative period, the patients present a very intense pain during the first hours. It is necessary to apply analgesic guidelines to control it, such as the combination of nonsteroidal anti-inflammatory drugs and intravenous opioids.

The use of catheters with continuous perfusion of local anesthetics accompanied by the possibility of self-administered boluses in shoulder surgery reduces the total dose of local anesthetic and the risk of side effects, and improves overall patient satisfaction. The use of an interscalene catheter is indicated mainly in patients who are going to undergo aggressive surgery with painful postoperative in the first 6 hours and in those patients who present the need for early and energetic rehabilitation. According to the type of surgery and patient characteristics, the catheter will be used between 3 and 5 days.
