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MINERVA ANESTESIOLOGICA

Rivista di Anestesia, Rianimazione, Terapia Antalgica e Terapia Intensiva


Official Journal of the Italian Society of Anesthesiology, Analgesia, Resuscitation and Intensive Care
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Minerva Anestesiologica 2015 December;81(12):1298-310

Copyright © 2015 EDIZIONI MINERVA MEDICA

lingua: Inglese

Melatonin reduces the need for sedation in ICU patients: a randomized controlled trial

Mistraletti G. 1, 2, Umbrello M. 2, Sabbatini G. 1, Miori S. 1, Taverna M. 1, Cerri B. 2, Mantovani E. S. 2, Formenti P. 2, Spanu P. 2, D’Agostino A. 3, Salini S. 4, Morabito A. 5, 6, Fraschini F. 7, Reiter R. J. 8, Iapichino G. 1, 2

1 Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi di Milano, Milan, Italy; 2 U.O. Anestesia e Rianimazione, A. O. San Paolo-Polo Universitario, Milan, Italy; 3 Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milan, Italy; 4 Dipartimento di Economia, Management e Metodi Quantitativi Università degli Studi di Milano, Milan, Italy; 5 Laboratorio di Statistica Medica, Biometria ed Epidemiologia “G.A. Maccacaro”, Università degli Studi di Milano, Milan, Italy; 6 Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, Milan, Italy; 7 Dipartimento di Farmacologia, Chemioterapia e Tossicologia Medica, Università degli Studi di Milano, Milan, Italy; 8 Department of Cellular and Structural Biology, University of Texas Health Science Centre, San Antonio, TX, USA


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BACKGROUND: Critically ill patients suffer from physiological sleep deprivation and have reduced blood melatonin levels. This study was designed to determine whether nocturnal melatonin supplementation would reduce the need for sedation in patients with critical illness.
METHODS: A single-center, double-blind randomized placebo-controlled trial was carried out from July 2007 to December 2009, in a mixed medical-surgical Intensive Care Unit of a University hospital, without any form of external funding. Of 1158 patients admitted to ICU and treated with conscious enteral sedation, 82 critically-ill with mechanical ventilation >48 hours and Simplified Acute Physiology Score II>32 points were randomized 1:1 to receive, at eight p.m. and midnight, melatonin (3+3mg) or placebo, from the third ICU day until ICU discharge. Primary outcome was total amount of enteral hydroxyzine administered.
RESULTS: Melatonin treated patients received lower amount of enteral hydroxyzine. Other neurological indicators (amount of some neuroactive drugs, pain, agitation, anxiety, sleep observed by nurses, need for restraints, need for extra sedation, nurse evaluation of sedation adequacy) seemed improved, with reduced cost for neuroactive drugs. Post-traumatic stress disorder prevalence did not differ between groups, nor did ICU or hospital mortality. Study limitations include the differences between groups before intervention, the small sample size, and the single-center observation.
CONCLUSION: Long-term enteral melatonin supplementation may result in a decreased need for sedation, with improved neurological indicators and cost reduction. Further multicenter evaluations are required to confirm these results with different sedation protocols.

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Mistraletti G, Umbrello M, Sabbatini G, Miori S, Taverna M, Cerri B, et al. Melatonin reduces the need for sedation in ICU patients: a randomized controlled trial. Minerva Anestesiol 2015 December;81(12):1298-310. 

Corresponding author e-mail

giovanni.mistraletti@unimi.it