Abstract
Adequate relief of perioperative pain has been deemed a fundamental right of patients, and obligation of practitioners.1 Inadequately relieved postoperative pain has numerous physiologic complications, attendant risk of increased morbidity, and causes needless suffering. More than 40% of postoperative patients report inadequate pain relief, or pain of moderate or greater intensity, despite treatment.1-3 Unrelieved acute postoperative pain is a risk factor for the development of chronic postsurgical pain.4,5 It seems axiomatic that the duration of analgesia should match the duration of pain.
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