Acute postoperative pain is a common clinical condition that, when poorly controlled, can result in a number of significant negative consequences. The American Pain Society commissioned an evidence-based guideline on the management of postoperative pain to promote evidence-based, safe, and effective perioperative pain management. An interdisciplinary panel developed 31 key questions and inclusion criteria to guide the evidence review. Investigators reviewed 6556 abstracts from multiple electronic databases up to November 2012, an updated evidence review to October 2014, and key references suggested by expert reviewers. More than 800 primary studies not included in a systematic review and 107 systematic reviews were included. Despite a large body of evidence, a number of critical research gaps were identified where only low-quality or insufficient evidence was found to help guide clinical practice recommendations. This report identifies evidence gaps including optimal methods and timing of perioperative patient education, nonpharmacological modalities, combinations of analgesic techniques, monitoring of patient response to treatment, techniques for neuraxial and regional analgesia, and organizational care delivery models. Recommendations to help guide the design of future perioperative studies are offered.

Acute postoperative pain is a common clinical condition requiring an evidence-based, planned, and multimodal approach. Despite the plethora of published evidence, much of it is weak and key questions remain unanswered. Researchers are encouraged to work together to produce strong evidence to help guide clinical decisions in perioperative pain management.