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Thirty percent of patients have moderate to severe pain 24 hr after ambulatory surgery: a survey of 5,703 patients

[Trente pour cent des patients ont des douleurs modérées à sévères, 24 h après la chirurgie ambulatoire : une enquête auprès de 5 703 patients]

From the Department of Anesthesia, University of Toronto, Toronto Western Hospital, Toronto, Ontario, Canada.

Address correspondence to: Dr. Frances Chung, Department of Anesthesia, EC 2-046, Toronto Western Hospital, 399 Bathurst St., Toronto, Ontario M5T 2S8, Canada. Phone: 416-603-5118; Fax: 416-603-6494; E-mail: frances.chung{at}uhn.on.ca

Purpose: Postoperative pain is the commonest reason for delayed discharge and unanticipated hospital admission after ambulatory surgery. We investigated the severity of pain at 24 hr postoperatively and determined the most painful procedures. The need for further medical advice and clarity of postoperative analgesia instructions were also studied.

Methods: Five thousand seven hundred and three ambulatory surgical patients were telephoned 24 hr postoperatively. Patients graded their pain using the ten-point self-assessing verbal scale (0 = no pain, 10 = worst pain). Data were analyzed in two groups, those with moderate to severe pain (pain score 4–10) and those with no or mild pain (0–3).

Results: Thirty percent of patients (1,495/5,703) had moderate to severe pain. Microdiscectomy, laparoscopic cholecystectomy, shoulder surgery, elbow/hand surgery, ankle surgery, inguinal hernia repair, and knee surgery were identified as the procedures causing most pain at 24 hr. 13.2% of patients needed medical advice by telephone, 1.4% made an unplanned visit to a doctor while the rate of readmission to the hospital was 0.08%. Ninety-eight percent found postoperative instruction sheets and advice helpful. Eighty-eight percent of patients indicated that analgesic instructions were absolutely clear.

Conclusion: This study has identified the more painful common ambulatory surgical procedures which will allow take home analgesia to be tailored according to individual procedures. Further improvement in analgesic instructions may help in better pain management of ambulatory surgery patients.

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