PA Medical News about Pain, Postoperative Analgesics, Opioid

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Perioperative pain management in the patient treated with opioids: Continuing Professional Development
Canadian Journal of Anesthesia, 11/09/09

Richebe P et al. – The number of patients under opioid treatment is increasing. Pain management is problematic in these patients, because regular opioid intake is associated with mechanisms of tolerance and dependence. More recently, opioid–induced hyperalgesia phenomena have been brought to light. As a rule, the usual opioid dose should be administered with the appropriate conversions, and additional requirements should be anticipated because of the surgical procedure. Local and regional anesthesia, and multimodal analgesia are indicated whenever possible. For the patient addicted to heroin or other opioids, the perioperative period is not a suitable time to initiate weaning. The physiological and pharmacological changes caused by chronic opioid intake must be understood in order to provide optimal pain management with respect to each individual and the type of procedure.