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Nociception monitoring

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https://www.readbyqxmd.com/read/28066825/a-blinded-randomised-placebo-controlled-trial-investigating-the-efficacy-of-morphine-analgesia-for-procedural-pain-in-infants-trial-protocol
#1
Rebeccah Slater, Caroline Hartley, Fiona Moultrie, Eleri Adams, Ed Juszczak, Richard Rogers, Jane E Norman, Chetan Patel, Kayleigh Stanbury, Amy Hoskin, Gabrielle Green
Infant pain has both immediate and long-term negative consequences, yet in clinical practice it is often undertreated. To date, few pain-relieving drugs have been tested in infants. Morphine is a potent analgesic that provides effective pain relief in adults, but there is inconclusive evidence for its effectiveness in infants. The purpose of this study is to establish whether oral morphine provides effective analgesia for procedural pain in infants. A blinded, placebo-controlled, parallel-group randomized, phase II, clinical trial will be undertaken to determine whether morphine sulphate administered orally prior to clinically-required retinopathy of prematurity (ROP) screening and heel lancing provides effective analgesia...
November 15, 2016: Wellcome Open Res
https://www.readbyqxmd.com/read/28057535/the-nitric-oxide-donor-isosorbide-dinitrate-induces-a-cephalic-cutaneous-hypersensitivity-associated-with-sensitization-of-the-medullary-dorsal-horn
#2
José María Flores Ramos, Laurent Devoize, Amélie Descheemaeker, Jean-Louis Molat, Philippe Luccarini, Radhouane Dallel
Nitric oxide donors are known to produce headache in healthy as well as migraine subjects, and to induce extracephalic cutaneous hypersensitivity in rodents. However, little is known on the effect of nitric oxide donors on cephalic cutaneous sensitivity. Combining behavioral, immunohistochemical, and in vivo electrophysiological approaches, this study investigated the effect of systemic administration of the nitric oxide donor, isosorbide dinitrate (ISDN), on cephalic and extracephalic cutaneous sensitivity and on neuronal activation within the medullary dorsal horn (MDH) in the rat...
January 3, 2017: Neuroscience
https://www.readbyqxmd.com/read/28044336/monitoring-regional-blockade
#3
REVIEW
K Ode, S Selvaraj, A F Smith
This review attempts to draw on the published literature to address three practical clinical questions. First, what means of testing the degree of regional blockade pre-operatively are available, and can eventual success or failure be determined soon after injection? Second, is it possible to predict if a block inserted after the induction of general anaesthesia will be effective when the patient wakes? Third, what features, and what duration, should cause concern when a block does not resolve as expected after surgery? Although the relevant literature is limited, we recommend testing of multiple sensory modalities before surgery commences; temperature and thermographic changes may offer additional early warning of success or failure...
January 2017: Anaesthesia
https://www.readbyqxmd.com/read/28006939/the-effect-of-combined-treatment-of-opioids-with-methylphenidate-on-nociception-in-rats-and-pain-in-human
#4
A Yamamotová, J Fricová, R Rokyta, R Šlamberová
Methylphenidate hydrochloride (MPH/Ritalin) is a stimulant used for off-label management of cancer-related fatigue and sedation; however, its use in pain treatment is still relatively rare. This study 1) compares the antinociceptive effect of MPH and its combination with morphine (MOR) in adult male Wistar rats after a single administration of MPH, MOR or their combination, and 2) compares the analgesic effects of opioids and Ritalin combined therapy with opioid monotherapy in patients with cancer pain. To objectively assess physical activity during a three-week monitoring period, patients were equipped with Actiwatch Score Actigraph...
December 22, 2016: Physiological Research
https://www.readbyqxmd.com/read/27875927/what-is-being-trained-how-divergent-forms-of-plasticity-compete-to-shape-locomotor-recovery-after-spinal-cord-injury
#5
J Russell Huie, Kazuhito Morioka, Jenny Haefeli, Adam R Ferguson
Spinal cord injury (SCI) is a devastating syndrome that produces dysfunction in motor and sensory systems, manifesting as chronic paralysis, sensory changes, and pain disorders. The multi-faceted and heterogeneous nature of SCI has made effective rehabilitative strategies challenging. Work over the last 40 years has aimed to overcome these obstacles by harnessing the intrinsic plasticity of the spinal cord to improve functional locomotor recovery. Intensive training after SCI facilitates lower extremity function and has shown promise as a tool for retraining the spinal cord by engaging innate locomotor circuitry in the lumbar cord...
January 13, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27807964/analgesia-nociception-monitoring-for-opioid-guidance-meta-analysis-of-randomized-clinical-trials
#6
Matthias Gruenewald, Astrid Dempfle
BACKGROUND: The adequate suppression of nociception is, besides induction of unconsciousness and immobility, the main objective during anaesthesia. Analgesics, most commonly opioids, are usually titrated by established clinical surrogates of nociception. Recently, monitoring techniques became available to evaluate analgesia/nociception during anaesthesia and provide better measures then clinical evaluation alone. They are primarily derived from autonomic response on physiologic standard measures...
November 3, 2016: Minerva Anestesiologica
https://www.readbyqxmd.com/read/27766525/comparison-of-the-qcon-and-qnox-indices-for-the-assessment-of-unconsciousness-level-and-noxious-stimulation-response-during-surgery
#7
Umberto Melia, Eva Gabarron, Mercé Agustí, Nuria Souto, Patricia Pineda, Joan Fontanet, Montserrat Vallverdu, Erik Weber Jensen, Pedro Gambus
The objective of this work is to compare the performances of two electroencephalogram based indices for detecting loss of consciousness and loss of response to nociceptive stimulation. Specifically, their behaviour after drug induction and during recovery of consciousness was pointed out. Data was recorded from 140 patients scheduled for general anaesthesia with a combination of propofol and remifentanil. The qCON 2000 monitor (Quantium Medical, Barcelona, Spain) was used to calculate the qCON and qNOX. Loss of response to verbal command and loss of eye-lash reflex were assessed during the transition from awake to anesthetized, defining the state of loss of consciousness...
October 20, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27749829/trpa1-mediates-sensation-of-the-rate-of-temperature-change-in-drosophila-larvae
#8
Junjie Luo, Wei L Shen, Craig Montell
Avoidance of noxious ambient heat is crucial for survival. A well-known phenomenon is that animals are sensitive to the rate of temperature change. However, the cellular and molecular underpinnings through which animals sense and respond much more vigorously to fast temperature changes are unknown. Using Drosophila larvae, we found that nociceptive rolling behavior was triggered at lower temperatures and at higher frequencies when the temperature increased rapidly. We identified neurons in the brain that were sensitive to the speed of the temperature increase rather than just to the absolute temperature...
January 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/27742411/inhibition-of-reinforcing-hyperalgesic-and-motor-effects-of-morphine-by-buspirone-in-rats
#9
Darakhshan Jabeen Haleem, Shazia Nawaz
: Morphine and other opioids are among the most effective prescription medications for the treatment of pain. Addiction and hyperalgesia associated with their long-term use limits the clinical utility of these drugs. In view of a role of somatodendritic serotonin-1A receptors in addiction and analgesic effects of morphine, the present study concerns effects of co-use of buspirone, a partial agonist at the serotonin-1A receptor, on reinforcing, hyperalgesic, and motor effects of morphine in rats...
January 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27703336/profile-of-the-capsaicin-8-patch-for-the-management-of-neuropathic-pain-associated-with-postherpetic-neuralgia-safety-efficacy-and-patient-acceptability
#10
Muhammad Laklouk, Ganesan Baranidharan
Capsaicin is a naturally occurring irritant active ingredient found in hot peppers. It is a ligand for transient receptor potential channel vanilloid receptors, which are found in nociceptive nerve terminals in the skin. Initial exposure to topical capsaicin leads to excitation of these receptors, release of vasoactive mediators, erythema, intense burning, pain, and thereafter desensitization of sensory neurons resulting in inhibition of pain transmission. Capsaicin 8% has been licensed for the treatment of postherpetic neuralgia pain in recent years...
2016: Patient Preference and Adherence
https://www.readbyqxmd.com/read/27702648/probing-pain-pathways-with-light
#11
Feng Wang, Erik Bélanger, Marie-Eve Paquet, Daniel Côté, Yves De Koninck
We have witnessed an accelerated growth of photonics technologies in recent years to enable not only monitoring the activity of specific neurons, while animals are performing certain types of behavior, but also testing whether specific cells, circuits, and regions are sufficient or necessary for initiating, maintaining, or altering this or that behavior. Compared to other sensory systems, however, such as the visual or olfactory system, photonics applications in pain research are only beginning to emerge. One reason pain studies have lagged behind is that many of the techniques originally developed cannot be directly implemented to study key relay sites within pain pathways, such as the skin, dorsal root ganglia, spinal cord, and brainstem...
October 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27693901/efficacy-and-safety-of-two-methadone-titration-methods-for-the-treatment-of-cancer-related-pain-the-equimeth2-trial-methadone-for-cancer-related-pain
#12
Philippe Poulain, Marie-Pierre Berleur, Shimsi Lefki, Danièle Lefebvre, Gisèle Chvetzoff, Eric Serra, Fibra Tremellat, Alain Derniaux, Marilène Filbet
CONTEXT: In the European Association for Palliative Care recommendations for cancer pain management, there was no consensus regarding the indications, titration, or monitoring of methadone. OBJECTIVES: This national, randomized, multicenter trial aimed to compare two methadone titration methods (stop-and-go vs. progressive) in patients with cancer-related pain who were inadequately relieved by or intolerant to Level 3 opioids. METHODS: The primary end point was the rate of success/failure at Day 4, defined as pain relief (reduction of at least two points on the visual scale and a pain score <5 for two consecutive days) and no overdose (Rudkin scale ≥3 and respiratory rate <8/minute)...
November 2016: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/27686494/chronic-administration-of-pyr-1-apelin-13-attenuates-neuropathic-pain-after-compression-spinal-cord-injury-in-rats
#13
Zahra Hajimashhadi, Nahid Aboutaleb, Farinaz Nasirinezhad
Apelin is an endogenous ligand for apelin receptor (APJ) with analgesic effect on visceral, analgesic and proanalgesic influences on acute pains in animal models. The purpose of this study was to determine the possible analgesic effects of [Pyr(1)] apelin-13 on chronic pain after spinal cord injury (SCI) in rats. Animals were randomly divided into three major groups as intact, sham and SCI. The SCI group randomly allocated to four subgroups as no treatment, vehicle-treatment (normal saline: 10μl, intrathecally) and two subgroups with intrathecal injection (i...
September 2, 2016: Neuropeptides
https://www.readbyqxmd.com/read/27622550/the-antinociceptive-properties-of-the-corydalis-yanhusuo-extract
#14
Lien Wang, Yan Zhang, Zhiwei Wang, Nian Gong, Tae Dong Kweon, Benjamin Vo, Chaoran Wang, Xiuli Zhang, Jae Yoon Chung, Amal Alachkar, Xinmiao Liang, David Z Luo, Olivier Civelli
Corydalis yanhusuo. W.T. extracts (YHS) are widely used for the treatment of pain and inflammation. There are a few studies that assessed the effects of YHS in pain assays; however, none of these studies has systematically compared its activities in the different pain animal modes namely: acute, inflammatory and chronic pain. Furthermore, little is known about the mechanism of YHS activity in these assays. The aim of this study was to systematically evaluate the antinociceptive properties of YHS by testing it in four standardized pain assays and to investigate its mechanism...
2016: PloS One
https://www.readbyqxmd.com/read/27538603/electrophysiological-assessment-of-nociception-in-patients-with-parkinson-s-disease-a-multi-methods-approach
#15
Janosch A Priebe, Miriam Kunz, Christian Morcinek, Peter Rieckmann, Stefan Lautenbacher
OBJECTIVE: Nociceptive abnormalities indicating increased pain sensitivity have been reported in patients with Parkinson's disease (PD). The disturbances are mostly responsive to dopaminergic (DA) treatment; yet, there are conflicting results. The objective of the present study was to investigate pain processing and nociception in PD patients in a more comprehensive manner than previous studies. For this purpose, a multi-methods approach was used in order to monitor different levels of the central nervous system (spinal, subcortical-vegetative, cortical)...
September 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27421789/effect-of-subacute-agomelatine-treatment-on-painful-diabetic-neuropathy-involvement-of-catecholaminergic-mechanisms
#16
Taliha H Aydın, Özgür D Can, Ümide Demir Özkay, Nazlı Turan
In this study, we investigated the effects of subacute agomelatine (40 and 80 mg/kg) administration on chronic hyperglycemia, metabolic parameters, and pain perception in streptozotocin-induced diabetic rats. Fasting blood glucose measurements and oral glucose tolerance tests were performed to evaluate the effect of agomelatine on glycemia, while metabolic parameters were monitored using metabolic cages. Potential effect of agomelatine on diabetes-induced mechanical and thermal allodynia was evaluated using dynamic plantar aesthesiometer and warm plate (38 °C) tests, respectively...
December 2016: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/27418174/antinociceptive-effects-of-botulinum-toxin-type-a-on-trigeminal-neuropathic-pain
#17
K Y Yang, M J Kim, J S Ju, S K Park, C G Lee, S T Kim, Y C Bae, D K Ahn
Previous studies have demonstrated that botulinum toxin type A (BoNT-A) attenuates orofacial nociception. However, there has been no evidence of the participation of the voltage-gated sodium channels (Navs) in the antinociceptive mechanisms of BoNT-A. This study investigated the cellular mechanisms underlying the antinociceptive effects of BoNT-A in a male Sprague-Dawley rat model of trigeminal neuropathic pain produced by malpositioned dental implants. The left mandibular second molar was extracted under anesthesia, followed by a miniature dental implant placement to induce injury to the inferior alveolar nerve...
September 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27411333/a-novel-multivariate-steady-state-index-during-general-anesthesia-stan
#18
Ana Castro, Fernando Gomes de Almeida, Pedro Amorim, Catarina S Nunes
The assessment of the adequacy of general anesthesia for surgery, namely the nociception/anti-nociception balance, has received wide attention from the scientific community. Monitoring systems based on the frontal EEG/EMG, or autonomic state reactions (e.g. heart rate and blood pressure) have been developed aiming to objectively assess this balance. In this study a new multivariate indicator of patients' steady-state during anesthesia (STAN) is proposed, based on wavelet analysis of signals linked to noxious activation...
July 13, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27403261/administration-of-orexin-receptor-1-antagonist-into-the-rostral-ventromedial-medulla-increased-swim-stress-induced-antinociception-in-rat
#19
Neda Soliemani, Alireza Moslem, Ali Shamsizadeh, Hassan Azhdari-Zarmehri
OBJECTIVES: Intracerebroventricular injection of orexin-A (hypocretin-1) antagonist has been shown to inhibit stress-induced analgesia. However the locations of central sites that may mediate these effects have not been totally demonstrated. This study was performed to investigate the role of rostral ventromedial medulla (RVM) orexin receptor 1 in stress-induced analgesia (SIA). MATERIALS AND METHODS: Forced swim stress in water was employed to adult male rats (200-250 g)...
May 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/27383702/selective-5-ht7-receptor-agonists-lp-44-and-lp-211-elicit-an-analgesic-effect-on-formalin-induced-orofacial-pain-in-mice
#20
Kadriye Demirkaya, Özlem Martı Akgün, Buğra Şenel, Zeynep Öncel Torun, Melik Seyrek, Enza Lacivita, Marcello Leopoldo, Ahmet Doğrul
OBJECTIVE: To investigate the antinociceptive effects of pharmacological activation of 5-HT7 receptors on orofacial pain in mice. MATERIAL AND METHODS: Nociception was evaluated by using an orofacial formalin test in male Balb-C mice. Selective 5-HT7 receptor agonists, LP 44 and LP 211 (1, 5, and 10 mg/kg), were given intraperitoneally 30 min prior to a formalin injection. A bolus of 10 µl of 4% subcutaneous formalin was injected into the upper lip of mice and facial grooming behaviors were monitored...
May 2016: Journal of Applied Oral Science: Revista FOB
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