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Nociception monitoring

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https://www.readbyqxmd.com/read/29216820/comparison-of-the-effect-of-different-infusion-rates-of-sufentanil-on-surgical-stress-index-during-cranial-pinning-in-children-under-general-anaesthesia-a-randomized-controlled-study
#1
In-Kyung Song, Sang-Hwan Ji, Eun-Hee Kim, Ji-Hyun Lee, Jin-Tae Kim, Hee-Soo Kim
BACKGROUND: Surgical stress index (SSI) is an established indicator for intraoperative nociception. Opioids are used to block stimulus of cranial pinning in neurosurgery. We investigated the effect of different infusion rates of sufentanil on SSI during cranial pinning in children under general anaesthesia. METHODS: Forty-nine children (2-12 years of age) underwent neurosurgery with pinning. The children were randomized into three groups based on the rate of sufentanil infusion: 0...
December 8, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/29205090/rapamycin-exacerbates-cardiovascular-dysfunction-after-complete-high-thoracic-spinal-cord-injury
#2
Khalid C Eldahan, David H Cox, Jenna L Gollihue, Samir P Patel, Alexander G Rabchevsky
Autonomic dysreflexia (AD) is a potentially life-threatening syndrome in individuals with spinal cord injury (SCI) above the T6 spinal level that is characterized by episodic hypertension in response to noxious stimuli below the lesion. Maladaptive intraspinal plasticity is thought to contribute to the temporal development of AD, and experimental approaches that reduce such plasticity mitigate the severity of AD. The mammalian target of rapamycin (mTOR) has gained interest as a mediator of plasticity, regeneration and nociceptor hypersensitivity in the injured spinal cord...
December 5, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29163199/slow-breathing-can-be-operantly-conditioned-in-the-rat-and-may-reduce-sensitivity-to-experimental-stressors
#3
Donald J Noble, William N Goolsby, Sandra M Garraway, Karmarcha K Martin, Shawn Hochman
In humans, exercises involving slowed respiratory rate (SRR) counter autonomic sympathetic bias and reduce responses to stressors, including in individuals with various degrees of autonomic dysfunction. In the rat, we examined whether operant conditioning could lead to reductions in respiratory rate (RR) and performed preliminary studies to assess whether conditioned SRR was sufficient to decrease physiological and behavioral responsiveness to stressors. RR was continuously monitored during 20 2-h sessions using whole body plethysmography...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163027/mechanisms-of-osteoarthritic-pain-studies-in-humans-and-experimental-models
#4
REVIEW
Annett Eitner, Gunther O Hofmann, Hans-Georg Schaible
Pain due to osteoarthritis (OA) is one of the most frequent causes of chronic pain. However, the mechanisms of OA pain are poorly understood. This review addresses the mechanisms which are thought to be involved in OA pain, derived from studies on pain mechanisms in humans and in experimental models of OA. Three areas will be considered, namely local processes in the joint associated with OA pain, neuronal mechanisms involved in OA pain, and general factors which influence OA pain. Except the cartilage all structures of the joints are innervated by nociceptors...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29139193/higher-doses-of-intraoperative-analgesia-are-associated-with-lower-levels-of-persistent-pain-and-less-analgesic-consumption-six-months-after-total-hip-arthroplasty
#5
F von Dincklage, A Jakuscheit, J Weth, G Lichtner, C Jurth, B Rehberg-Klug
BACKGROUND: Persistent postoperative pain is a major health problem affecting nearly 30% of all patients undergoing total hip arthroplasty. Previous studies have demonstrated an association between the intensity of acute postoperative pain and persistent pain, but this association might be an epiphenomenon of insufficient intraoperative analgesia. In this study, we investigated the association between the intraoperative level of analgesia and the persistent postoperative pain 6 months after surgery...
November 14, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29121306/monitoring-nociception-getting-there-yet-might-be-easier-with-a-road-map
#6
T Ledowski
No abstract text is available yet for this article.
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29121287/analgesia-nociception-index-for-the-assessment-of-pain-in-critically-ill-patients-a-diagnostic-accuracy-study
#7
G Chanques, T Tarri, A Ride, A Prades, A De Jong, J Carr, N Molinari, S Jaber
Background: Behavioural pain tools are used in Intensive Care Unit (ICU) patients unable to self-report their pain-intensity but need sustained efforts to educate and train the ICU team because of the subjective nature of these clinical tools. This study measured the validity and performance of an electrophysiological monitoring tool based on the spectral analysis of heart rate variability, the Analgesia Nociception Index (ANI) which varies from 0 (minimal parasympathetic tone, maximal stress-response and pain) to 100 (maximal parasympathetic tone, minimal stress-response and pain)...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29107209/phkv-a-toxin-isolated-from-the-spider-venom-induces-antinociception-by-inhibition-of-cholinesterase-activating-cholinergic-system
#8
Flavia Karine Rigo, Mateus Fortes Rossato, Gabriela Trevisan, Samira Dal-Toé De Prá, Rafael Porto Ineu, Mariane Bernardo Duarte, Célio José de Castro Junior, Juliano Ferreira, Marcus Vinicius Gomez
BACKGROUND AND AIMS: Cholinergic agents cause antinociception by mimicking the release of acetylcholine (ACh) from spinal cholinergic nerves. PhKv is a peptide isolated from the venom of the armed spider Phoneutria nigriventer. It has an antiarrythmogenic activity that involves the enhanced release of acetylcholine. The aim of this study was to investigate whether PhKv had an antinociceptive action in mice. METHODS: Male albino Swiss mice (25-35g) were used in this study...
October 26, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29105170/influence-of-glutamate-evoked-pain-and-sustained-elevated-muscle-activity-on-blood-oxygenation-in-the-human-masseter-muscle
#9
Shunichi Suzuki, Taro Arima, Yoshimasa Kitagawa, Peter Svensson, Eduardo Castrillon
This study aimed to investigate the effect of glutamate-evoked masseter muscle pain on intramuscular oxygenation during rest and sustained elevated muscle activity (SEMA). Seventeen healthy individuals participated in two sessions in which they were injected with glutamate and saline in random order. Each session was divided into three, 10-min periods. During the first (period 1) and the last (period 3) 10-min periods, participants performed five intercalated 1-min bouts of masseter SEMA with 1-min periods of 'rest'...
November 3, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29104423/distance-based-permutation-of-inter-meal-differences-as-a-sensitive-test-of-temporomandibular-joint-nociception-in-rats
#10
Mikhail Umorin, Phillip R Kramer, Larry L Bellinger
Purpose: Compare non-parametric permutation method using intr-meal rate as endpoint to existing ANOVA method that uses average daily meal duration as an endpoint for detection of chronic pain in Sprague-Dawley rats. Methods: Nociception following bilateral temporomandibular joint (TMJ) injection of high-dose of Complete Freunds Adjuvant (CFA, 250 μg/50 μL per side) could be detected in young adult male Sprague-Dawley rats using average daily meal durations as a measure of nociception for up to 19 days (Kramer, Kerins, Schneiderman, & Bellinger, 2010) using ANOVA and multiple comparisons range tests...
September 2017: Journal of Applied Biobehavioral Research
https://www.readbyqxmd.com/read/29082571/the-role-of-peripheral-vasopressin-1a-and-oxytocin-receptors-on-the-subcutaneous-vasopressin-antinociceptive-effects
#11
A Manzano-García, A González-Hernández, I A Tello-García, G Martínez-Lorenzana, M Condés-Lara
BACKGROUND: Vasopressin (AVP) seems to play a role as an antinociceptive neurohormone, but little is known about the peripheral site of action of its antinociceptive effects. Moreover, AVP can produce motor impairment that could be confused with behavioural antinociception. Finally, it is not clear which receptor is involved in the peripheral antinociceptive AVP effects. METHODS: In anaesthetized rats with end-tidal CO2 monitoring, extracellular unitary recordings were performed, measuring the evoked activity mediated by Aβ-, Aδ-, C-fibres and post-discharge...
October 30, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29076307/toward-a-functional-near-infrared-spectroscopy-based-monitoring-of-pain-assessment-for-nonverbal-patients
#12
Raul Fernandez Rojas, Xu Huang, Keng-Liang Ou
Pain diagnosis for nonverbal patients represents a challenge in clinical settings. Neuroimaging methods, such as functional magnetic resonance imaging and functional near-infrared spectroscopy (fNIRS), have shown promising results to assess neuronal function in response to nociception and pain. Recent studies suggest that neuroimaging in conjunction with machine learning models can be used to predict different cognitive tasks. The aim of this study is to expand previous studies by exploring the classification of fNIRS signals (oxyhaemoglobin) according to temperature level (cold and hot) and corresponding pain intensity (low and high) using machine learning models...
October 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29043601/pupillary-reflex-dilation-in-response-to-incremental-nociceptive-stimuli-in-patients-receiving-intravenous-ketamine
#13
Nada Sabourdin, Thomas Giral, Risa Wolk, Nicolas Louvet, Isabelle Constant
Pupillometry is a non-invasive monitoring technique, which allows dynamic pupillary diameter measurement by an infrared camera. Pupillary diameter increases in response to nociceptive stimuli. In patients anesthetized with propofol or volatile agents, the magnitude of this pupillary dilation is related to the intensity of the stimulus. Pupillary response to nociceptive stimuli has never been studied under ketamine anesthesia. Our objective was to describe pupillary reflex dilation after calibrated tetanic stimulations in patients receiving intravenous ketamine...
October 17, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29036889/single-administration-of-melatonin-modulates-the-nitroxidergic-system-at-the-peripheral-level-and-reduces-thermal-nociceptive-hypersensitivity-in-neuropathic-rats
#14
Elisa Borsani, Barbara Buffoli, Veronica Bonazza, Russel J Reiter, Rita Rezzani, Luigi F Rodella
Neuropathic pain is a severe condition with unsatisfactory treatments. Melatonin, an indolamine, seems to be a promising molecule suitable for this purpose due to its well-known anti-inflammatory, analgesic, and antioxidant effects, as well as its modulation of the nitroxidergic system. Nevertheless, the data on its mechanism of action and potentialities are currently insufficient in this pathology, especially at the peripheral level. Thus, this work evaluated the effect of a single administration of melatonin in an established mononeuropathy pain model that monitors the behaviour and the changes in the nitroxidergic system in dorsal root ganglia and skin, which are affected by nervous impairment...
October 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29033356/intraoperative-analgesia-guided-by-the-analgesia-nociception-index-in-bariatric-surgery-an-unmatched-case-control-study
#15
Lisa Le Gall, Anaëlle David, Pauline Carles, Sébastien Leuillet, Brigitte Chastel, Catherine Fleureau, Antoine Dewitte, Alexandre Ouattara
INTRODUCTION: Analgesia Nociception Index (ANI) has been proposed for the evaluation of the nociception-antinociception balance in the perioperative period. In obese patient, where the management of analgesia may be rendered difficult by pharmacological changes, we hypothesized that the monitoring of analgesia with ANI would reduce intraoperative opioid consumption during bariatric surgery. METHODS: This monocentric, observational, unmatched case-control study aimed to compare perioperative data from obese subjects (body mass index ≥ 35kg...
October 12, 2017: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/28991059/analgesia-nociception-index-monitoring-during-supratentorial-craniotomy
#16
Lakshman K Kommula, Sonia Bansal, Ganne S Umamaheswara Rao
BACKGROUND: Objective monitoring of pain during and after surgery has been elusive. Recently, Analgesia Nociception Index (ANI) monitor based on the high frequency component of heart rate variability has been launched into clinical practice. We monitored analgesia during craniotomy using ANI monitor and compared it with cardiovascular parameters and response entropy (RE) of entropy monitor. MATERIALS AND METHODS: In 21 patients undergoing a craniotomy for a supratentorial lesion, we monitored ANI, heart rate (HR), mean arterial pressure (MAP), state entropy, and RE throughout the surgery...
October 5, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28987074/combination-of-rheum-ribes-and-metformin-against-diabetes-thermal-hyperalgesia-and-tactile-allodynia-in-a-mice-model
#17
Karim Raafat, Abdalla El-Lakany
Context • The prevalence of diabetes mellitus (DM) is increasing. Because of its progressive nature, therapeutic shifts and combinations are often required to reduce the risk of glucose toxicity and avoid serious side effects. To treat DM and its related complications, a combination therapy may offer a promising remedy to counteract those issues. Objectives • The study was established to evaluate the phytochemical content of a standardized aqueous extract of Rheum ribes (RR) and to determine the antidiabetic, antihyperalgesic, and antimechanical allodynic effects of 50 mg/kg of RR alone, 25 mg/kg of metformin (MTF) alone, and a combination of the 2 substances (MTF+RR) in mice with alloxan-induced diabetes...
October 2, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28971837/cgrp%C3%AE-within-the-trpv1-cre-population-contributes-to-visceral-nociception
#18
Nick J Spencer, Elin I Magnúsdóttir, Jon Jakobsson, Garreth Kestell, Bao Nan Chen, David Morris, Simon J H Brookes, Malin C Lagerstrom
The role of Calcitonin Gene Related Peptide (CGRP) in visceral and somatic nociception is incompletely understood. CGRPα is highly expressed in sensory neurons of dorsal root ganglia (DRG) and particularly in neurons that also express the transient receptor potential cation channel subfamily V member 1 (Trpv1). Therefore, we investigated changes in visceral and somatic nociception following deletion of CGRPα from the Trpv1-Cre population using the Cre/lox system. In control mice, acetic acid injection (0...
September 28, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28951360/-spinal-serotonergic-receptor-is-involved-in-descending-inhibition-of-cardiac-nociception-by-the-lateral-reticular-nucleus-in-rats
#19
Man Han, Xiao-Hua Liu, Jian-Qing DU
OBJECTIVE: To investigate the role of the lateral reticular nucleus (LRN) in descending inhibition of cardiac nociception in rats and the involvement of spinal serotonergic receptors in the descending inhibition. METHODS: Male SD rats were randomly divided into 5 groups, namely bradykinin (BK) group, BK + glutamate group, BK + methysergide group, BK + glutamate + methysergide group, and BK + glutamate + vehicle group. The rats received glutamate microinjection in the LRN combined with the intrathecal injection of serotonergic receptor antagonist methysergide, and the changes in the cardiacsomatic motor reflex induced by intrapericardial BK injection were monitored by observing electromyogram (EMG) responses of the dorsal spinotrapezius muscle; c-Fos expression in the spinal dorsal horn was also tested...
September 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28882752/mechanosensitive-ion-channels-in-articular-nociceptors-drive%C3%A2-mechanical-allodynia-in-osteoarthritis
#20
B H He, M Christin, S Mouchbahani-Constance, A Davidova, R Sharif-Naeini
OBJECTIVE: Osteoarthritis (OA) is a disabling and highly prevalent condition affecting millions worldwide. Pain is the major complaint of OA patients and is presently inadequately managed. It manifests as mechanical allodynia, a painful response to innocuous stimuli such as joint movement. Allodynia is due in part to the sensitization of articular nociceptors to mechanical stimuli. These nociceptors respond to noxious mechanical stimuli applied to their terminals via the expression of depolarizing high-threshold mechanosensitive ion channels (MSICs) that convert painful mechanical forces into electrical signals...
September 5, 2017: Osteoarthritis and Cartilage
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