The purposes of this descriptive study were to 1) examine pain intensity in patients post total knee arthroplasty at the first three postoperative days; 2) assess pain management strategies; 3) examine the pain effects on patients' activity of daily living; and 4) measure patients' satisfaction with postoperative pain management. Ninety-eight patients underwent total knee arthroplasty were excluded from Ramathibodi Hospital, Pramongkutklao Hospital, Chulalonkorn Hospital, and Lerdsin Hospital. Demographic questionnaire, and pain assessment questionnaire developed by Detroit Medical Center and Wayne State University were used including pain management questionaire.

The study revealed that 1) at the first postoperative day, patients had mean scores pain at most at the high level; 2) the frequent strategies for pain management that patients, physicians and  nurses used were turning body into the comfortable position, giving information for anxiety relief, and paying attention and asking patients' pain perception. At the first two postoperative day patients received  morphine injections as a pharmacological management, which was high efficacy; 3) severe pain and movement, having activities, having interpersonal relationships with other persons, mood, coughing, and deep breathing were positively correlated (r = .53, .46, .41, .37, .32,  p < 0.01). Importantly, pain had the strongest relation with movement (r = .53,  p < 0.01), and 4) patients reported high satisfaction with postoperative pain management strategies given by physicians, nurses and health care staff.