Article (Scientific journals)
Effects of remifentanil on brain responses to noxious stimuli during deep propofol sedation
Pujol, Jesus; Martínez-Vilavella, Gerard; Gallart, Lluís et al.
2023In British Journal of Anaesthesia, 130 (2), p. 330 - e338
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Keywords :
deep sedation; functional MRI; neuroimaging; nociception; pain; propofol; remifentanil; Anesthetics, Intravenous; Brain; Electroencephalography; Humans; Pain; Piperidines; Propofol; Remifentanil; Unconsciousness; Anesthesiology and Pain Medicine
Abstract :
[en] Background: The safety of anaesthesia has improved as a result of better control of anaesthetic depth. However, conventional monitoring does not inform on the nature of nociceptive processes during unconsciousness. A means of inferring the quality of potentially painful experiences could derive from analysis of brain activity using neuroimaging. We have evaluated the dose effects of remifentanil on brain response to noxious stimuli during deep sedation and spontaneous breathing. Methods: Optimal data were obtained in 26 healthy subjects. Pressure stimulation that proved to be moderately painful before the experiment was applied to the thumbnail. Functional MRI was acquired in 4-min periods at low (0.5 ng ml−1), medium (1 ng ml−1), and high (1.5 ng ml−1) target plasma concentrations of remifentanil at a stable background infusion of propofol adjusted to induce a state of light unconsciousness. Results: At low remifentanil doses, we observed partial activation in brain areas processing sensory-discriminative and emotional-affective aspects of pain. At medium doses, relevant changes were identified in structures highly sensitive to general brain arousal, including the brainstem, cerebellum, thalamus, auditory and visual cortices, and the frontal lobe. At high doses, no significant activation was observed. Conclusions: The response to moderately intense focal pressure in pain-related brain networks is effectively eliminated with safe remifentanil doses. However, the safety margin in deep sedation-analgesia would be narrowed in minimising not only nociceptive responses, but also arousal-related biological stress.
Disciplines :
Anesthesia & intensive care
Author, co-author :
Pujol, Jesus;  MRI Research Unit, Department of Radiology, Hospital Del Mar, Barcelona, Spain ; Centro Investigación Biomédica en Red de Salud Mental, CIBERSAM G21, Barcelona, Spain
Martínez-Vilavella, Gerard;  MRI Research Unit, Department of Radiology, Hospital Del Mar, Barcelona, Spain
Gallart, Lluís;  Department of Anesthesiology, Hospital Del Mar-IMIM, Barcelona, Spain ; Department of Surgery, Universitat Autònoma de Barcelona, Barcelona, Spain
Blanco-Hinojo, Laura;  MRI Research Unit, Department of Radiology, Hospital Del Mar, Barcelona, Spain ; Centro Investigación Biomédica en Red de Salud Mental, CIBERSAM G21, Barcelona, Spain
Pacreu, Susana;  Department of Anesthesiology, Hospital Del Mar-IMIM, Barcelona, Spain
Bonhomme, Vincent  ;  Centre Hospitalier Universitaire de Liège - CHU > > Service d'anesthésie - réanimation
Deus, Joan;  MRI Research Unit, Department of Radiology, Hospital Del Mar, Barcelona, Spain ; Department of Psychobiology and Methodology in Health Sciences, Autonomous University of Barcelona, Barcelona, Spain
Pérez-Sola, Víctor;  Centro Investigación Biomédica en Red de Salud Mental, CIBERSAM G21, Barcelona, Spain ; Institute of Neuropsychiatry and Addictions, Hospital Del Mar- IMIM, Pompeu I Fabra University, Barcelona, Spain
Gambús, Pedro L.;  Systems Pharmacology Effect Control & Modeling Research Group, Anesthesiology Department, Hospital Clinic de Barcelona, Barcelona, Spain
Fernández-Candil, Juan;  Department of Anesthesiology, Hospital Del Mar-IMIM, Barcelona, Spain
Language :
English
Title :
Effects of remifentanil on brain responses to noxious stimuli during deep propofol sedation
Publication date :
February 2023
Journal title :
British Journal of Anaesthesia
ISSN :
0007-0912
eISSN :
1471-6771
Publisher :
Elsevier Ltd
Volume :
130
Issue :
2
Pages :
e330 - e338
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 November 2023

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