Journal ArticleDOI
Pupillometry to detect pain response during general anaesthesia following unilateral popliteal sciatic nerve block: a prospective, observational study.
Sylvain Isnardon,Marc Vinclair,Céline Genty,Amelie Hebrard,Pierre Albaladejo,Jean François Payen +5 more
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TLDR
The effects of peripheral nerve block can be detected via the measurement of pupillary reflex dilation response to noxious stimulation of the skin in patients receiving remifentanil through a proof of concept study.Abstract:
CONTEXT Pupillary reflex dilation appears to be a reliable indicator of response to noxious stimulation even under general anaesthesia. The ability of pupillometry to detect the effects of extremity blocks during continuous infusion of opioids remains unknown. OBJECTIVE To explore the performance of pupillometry to detect differences in pupillary reflex dilation response to a standardised noxious stimulus applied to each leg following unilateral popliteal sciatic nerve block during continuous infusion of remifentanil. DESIGN Prospective, observational study. SETTING University hospital anaesthesia department, between June 2010 and December 2010. PATIENTS Twenty-four adult patients undergoing elective foot or ankle surgery under general anaesthesia who requested a peripheral nerve block. Unilateral popliteal sciatic nerve block with 0.75% ropivacaine and 1% lidocaine was performed awake. General anaesthesia was maintained with steady-state infusions of propofol and remifentanil. MAIN OUTCOME MEASURE Video-based pupillometer was used to determine pupillary reflex dilation during tetanic stimulation (60 m, 100 Hz) applied to the skin area innervated by the sciatic nerve for 5 s after the onset of general anaesthesia. RESULTS Sensory nerve block led to a blunted maximal pupillary reflex dilation response to noxious stimulation compared with the non-blocked leg: median (interquartile range) change from baseline 2% (1 to 4%) versus 17% (13 to 24%), respectively (P < 0.01). The differences in the response persisted throughout the 5-s stimulus and the recovery phase. CONCLUSION These results are a proof of concept. The effects of peripheral nerve block can be detected via the measurement of pupillary reflex dilation response to noxious stimulation of the skin in patients receiving remifentanil.read more
Citations
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Journal ArticleDOI
Portable infrared pupillometry: a review.
TL;DR: An introduction to the physiology of pupillary reflexes and the currently established clinical applications of infrared pupillometry is presented, which will hopefully encourage physicians to use this diagnostic tool in their clinical practice.
Journal Article
Effect site concentration of remifentanil and pupillary response to noxious stimulation
J.M. Eba,Edgard Engelman,Denis Schmartz,Anne Ducart,Patricia Ewalenko,Micheline Levarlet,Luc Barvais +6 more
TL;DR: During propofol TCI in healthy patients, the decrease in pupil response to a painful stimulus is a better measurement of the progressive increase of remifentanil Ce(T) up to 5 ng ml(-1) than haemodynamic or BIS measurements.
Journal ArticleDOI
Monitoring depth of anesthesia: from consciousness to nociception. A window on subcortical brain activity.
Isabelle Constant,Nada Sabourdin +1 more
TL;DR: The pupillometry, which is based on the assessment of the pupillary reflex dilatation induced by nociceptive stimulations, might be the most adapted to assess the stress in the awake or sedated neonate, while the performances of this method appear disappointing under anesthesia.
Journal ArticleDOI
Physiological Signal Processing for Individualized Anti-nociception Management During General Anesthesia: a Review.
J. De jonckheere,Vincent Bonhomme,M. Jeanne,Emmanuel Boselli,M. Gruenewald,Régis Logier,P. Richebe +6 more
TL;DR: Though presented devices could constitute efficient solutions for individualized anti-nociception management during general anesthesia, this review of current literature emphasizes the fact that the choice to use one or the other mainly relies on the clinical context and the general purpose of the monitoring.
Journal ArticleDOI
Prediction of Opioid Analgesic Efficacy by Measurement of Pupillary Unrest.
Andrew E. Neice,Matthias Behrends,Michael P. Bokoch,Katherine M Seligman,Nicole M Conrad,Merlin D. Larson +5 more
TL;DR: It is observed that the pretreatment magnitude of PUAL is correlated with the analgesic response to opioid therapy, and that patients who exhibit higher levels ofPUAL change after opioid administration have a more beneficial analgesic effect from opioids.
References
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Journal ArticleDOI
Influence of age and gender on the pharmacokinetics and pharmacodynamics of remifentanil. I. Model development
Charles F. Minto,Thomas W. Schnider,Talmage D. Egan,Elizabeth J. Youngs,Harry J. M. Lemmens,Pedro L. Gambús,Valerie Billard,John F. Hoke,Katherine H. P. Moore,David J. Hermann,Keith T. Muir,Jaap W. Mandema,Steven L. Shafer +12 more
TL;DR: The aim of this study was to determine the influence of age and gender on the pharmacokinetics and pharmacodyn of fentanyl, alfent anil, and sufentanil.
Journal ArticleDOI
Anesthetic depth defined using multiple noxious stimuli during isoflurane/oxygen anesthesia. I. Motor reactions.
TL;DR: Tetanic stimulation and, to some extent, trapezius squeeze are reproducible and noninvasive stimulation patterns that can be used as an alternative to skin incision when evaluating potency of an anesthetic agent.
Journal ArticleDOI
Pupillary response to noxious stimulation during isoflurane and propofol anesthesia.
Merlin D. Larson,Daniel I. Sessler,Denna E. Washington,B Merrifield,James A. Hynson,Joseph McGuire +5 more
TL;DR: It is concluded that with these experimental conditions, the pupil is a more sensitive measure of noxious stimulation than the commonly used variables of arterial blood pressure and heart rate.
Journal ArticleDOI
Effect site concentrations of remifentanil and pupil response to noxious stimulation
TL;DR: In this paper, the relationship between the target effect site concentration (CeT) of remifentanil and the pupil diameter and reactivity in response to a standard noxious stimulus were evaluated.
Journal Article
Effect site concentration of remifentanil and pupillary response to noxious stimulation
J.M. Eba,Edgard Engelman,Denis Schmartz,Anne Ducart,Patricia Ewalenko,Micheline Levarlet,Luc Barvais +6 more
TL;DR: During propofol TCI in healthy patients, the decrease in pupil response to a painful stimulus is a better measurement of the progressive increase of remifentanil Ce(T) up to 5 ng ml(-1) than haemodynamic or BIS measurements.