Impact of Melatonin on Sleep and Pain After Total Knee Arthroplasty Under Regional Anesthesia With Sedation: A Double-Blind, Randomized, Placebo-Controlled Pilot Study.

TitleImpact of Melatonin on Sleep and Pain After Total Knee Arthroplasty Under Regional Anesthesia With Sedation: A Double-Blind, Randomized, Placebo-Controlled Pilot Study.
Publication TypeJournal Article
Year of Publication2015
AuthorsKirksey MA, Yoo D, Danninger T, Stundner O, Ma Y, Memtsoudis SG
JournalJ Arthroplasty
Volume30
Issue12
Pagination2370-5
Date Published2015 Dec
ISSN1532-8406
KeywordsAged, Anesthesia, Conduction, Arthroplasty, Replacement, Knee, Central Nervous System Depressants, Double-Blind Method, Female, Humans, Male, Melatonin, Middle Aged, Pain, Postoperative, Pilot Projects, Sleep, Sleep Wake Disorders
Abstract

This pilot study explores sleep disruption after total knee arthroplasty and the impact of melatonin on sleep and postoperative pain. Sleep time was decreased on the last preoperative night and first two postoperative nights. Sleep efficiency was decreased on all three postoperative nights. Compared to placebo, melatonin increased sleep efficiency by 4.4% (mean; 95% CI -1.6, 10.4; P=0.150) and sleep time by 29 min (mean; 95% CI -2.0, 60.4; P=0.067). Melatonin appeared to have no effect on subjective sleep quality or daytime sleepiness, pain at rest or pain with standardized activity. In conclusion, sleep quality is impaired after total knee arthroplasty and exogenous melatonin does not appear to improve postoperative sleep or pain to a significant degree.

DOI10.1016/j.arth.2015.06.034
Alternate JournalJ Arthroplasty
PubMed ID26173613

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