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Korean Journal of Anesthesiology 2007;52(2):172-178.
DOI: https://doi.org/10.4097/kjae.2007.52.2.172   
Effect of Intrathecal Morphine for Total Knee Replacement Arthroplasty Elderly Patients.
Min Jung Hur, Youn Jin Kim, Hee jung Baik, Jong Hak Kim
Department of Anesthesiology and Pain Medicine, College of Medicine, Ewha Womans Univeristy, Seoul, Korea. ankyj@ewha.ac.kr
Abstract
BACKGROUND
Low-dose intrathecal opioid has been used for early postoperative pain co1ntrol. This study was designed to assess effect intrathecal morphine on postoperative pain control for total knee arthroplasty (TKA) under combined spinal-epidural analgesia (CSE) in elderly patients.
METHODS
Fifty four patients over 60 years, undergoing TKA were randomly allocated to three groups. M(0) group for control group did not received intrathecal morphine, M(50) and M(100) group received intrathecal morphine 50microgram and 100microgram respectively. The pain scores (verbal numeric rating scale, VNRS) at rest and coughing, analgesic consumption, patient satisfaction and side effects such as nausea, vomiting, pruritus, headache, dizziness, sedation, respiratory depression, and urinary retention were recorded immediately before and at 1, 3, 6, 12, 24, 48 hour after the initiation of patient-controlled epidural analgesia (PCEA). RESULTS: VNRS were low at each time, and were not exceeding 2 in all groups. M(50) and M(100) group revealed significantly less analgesic consumption compared to M(0) group (P < 0.05). PCEA first injection time after PCEA connection was shortest in M(0) group compared to M(50) and M(100) group. The incidence of pruritus increased in M(50) and M(100) group with dose-dependence, but no significant differences were noticed in other side effects.
CONCLUSIONS
Intrathecal morphine use showed no significant analgesic effect except pruritus compared to control group. Further studies are required into the effective intrathecal morphine without side effects in elderly patients for TKA.
Key Words: analgesia; morphine; patient-controlled epidural analgesia; total knee arthroplasty


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