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Nociception monitoring

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https://www.readbyqxmd.com/read/29671874/pain-assessment-by-pupil-dilation-reflex-in-response-to-noxious-stimulation-in-anaesthetized-adults
#1
D Wildemeersch, N Peeters, V Saldien, M Vercauteren, G Hans
BACKGROUND: In response to noxious stimulation, pupillary dilation reflex (PDR) occurs even in anaesthetized patients. The aim of the study was to evaluate the ability of pupillometry with an automated increasing stimulus intensity to monitor intraoperative opioid administration. METHODS: Thirty-four patients undergoing elective surgery were enrolled. Induction by propofol anaesthesia was increased progressively until the sedation depth criteria (SeD) were attained...
April 19, 2018: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29669562/comfort-in-palliative-sedation-compas-a-transdisciplinary-mixed-method-study-protocol-for-linking-objective-assessments-to-subjective-experiences
#2
Stefaan Six, Steven Laureys, Jan Poelaert, Johan Bilsen, Peter Theuns, Reginald Deschepper
BACKGROUND: In case of untreatable suffering at the end of life, palliative sedation may be chosen to assure comfort by reducing the patient's level of consciousness. An important question here is whether such sedated patients are completely free of pain. Because these patients cannot communicate anymore, caregivers have to rely on observation to assess the patient's comfort. Recently however, more sophisticated techniques from the neurosciences have shown that sometimes consciousness and pain are undetectable with these traditional behavioral methods...
April 18, 2018: BMC Palliative Care
https://www.readbyqxmd.com/read/29655977/dexmedetomidine-or-fentanyl-cardiovascular-stability-and-analgesia-during-propofol-ketamine-total-intravenous-anaesthesia-in-experimental-pigs
#3
Andreas Lervik, Joanna Raszplewicz, Birgit Ranheim, Susanna Solbak, Simen F Toverud, Henning A Haga
OBJECTIVE: To compare cardiovascular function and response to nociception during total intravenous anaesthesia in pigs with propofol, ketamine and either dexmedetomidine or fentanyl administered as a continuous infusion. STUDY DESIGN: Blinded, randomized, balanced, crossover study ANIMALS: Eight immunocastrated male, mixed breed pigs with a mean ± standard deviation body weight of 26.4 ± 1.9 kg for dexmedetomidine and 27.5 ± 3.8 kg for fentanyl treatment...
December 5, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29601275/effects-of-conversational-hypnosis-on-relative-parasympathetic-tone-and-patient-comfort-during-axillary-brachial-plexus-blocks-for-ambulatory-upper-limb-surgery-a-quasiexperimental-pilot-study
#4
Emmanuel Boselli, Hervé Musellec, Franck Bernard, Nicolas Guillou, Pierre Hugot, Caroline Augris-Mathieu, Nathalie Diot-Junique, Lionel Bouvet, Bernard Allaouchiche
This two-center quasiexperimental pilot study was to determine the effect of conversational hypnosis on patient comfort and parasympathetic tone, which may represent a quantitative measure of hypnotic depth, during regional anesthesia. The patients received conversational hypnosis in one center and oral premedication in the other. The patients' subjective comfort (0-10 rating scale) and objective parasympathetic tone, as assessed by the Analgesia/Nociception Index (ANI), were measured before and after regional anesthesia...
April 2018: International Journal of Clinical and Experimental Hypnosis
https://www.readbyqxmd.com/read/29568123/non-instrumental-clinical-monitoring-does-not-guarantee-an-adequate-course-of-general-anesthesia-a-prospective-clinical-study
#5
Katarzyna Szostakiewicz, Zbigniew Rybicki, Dariusz Tomaszewski
BACKGROUND: Clinical monitoring is the most common method of adjusting the appropriate level of general anesthesia. However, episodes of intraoperative awareness (AWR) are still reported, suggesting that clinical observations may not be sufficient in some cases. The objective of this study was to compare the efficacy of clinical and instrumental neuromonitoring with auditory evoked potentials (AEP) in an intraoperative analysis of the proper level of general anesthesia. METHODS: Patients scheduled for elective surgery were randomly divided into two groups...
March 21, 2018: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/29469163/a-method-for-characterising-human-intervertebral-disc-glycosaminoglycan-disaccharides-using-liquid-chromatography-mass-spectrometry-with-multiple-reaction-monitoring
#6
X Liu, D Krishnamoorthy, L Lin, P Xue, F Zhang, L Chi, R J Linhardt, J C Iatridis
Intervertebral disc (IVD) degeneration results in the depletion of proteoglycans and glycosaminoglycans (GAGs), which can lead to structural and mechanical loss of IVD function, ingrowth of nociceptive nerve fibres and eventually discogenic pain. Specific GAG types as well as their disaccharide patterns can be predictive of disease and degeneration in several tissues but have not been comprehensively studied within the IVD. A highly sensitive mass spectrometry based technique with multiple reaction monitoring (MRM) was used to provide characterisation of chondroitin sulphate (CS), hyaluronic acid (HA), heparan sulphate (HS) and their disaccharide sulphation patterns across different anatomical regions of human IVDs...
February 22, 2018: European Cells & Materials
https://www.readbyqxmd.com/read/29445230/investigation-of-biomarkers-alterations-after-an-acute-tissue-trauma-in-human-trapezius-muscle-using-microdialysis
#7
Line Bay Sørensen, Parisa Gazerani, Karin Wåhlén, Nazdar Ghafouri, Björn Gerdle, Bijar Ghafouri
Alterations in muscle milieu are suggested as important activity of peripheral drive in patients with chronic musculoskeletal pain (CMP). Microdialysis (MD) has been used in monitoring altered metabolic response pattern in muscles. However, the insertion of MD probe causes a local tissue trauma. Whether and how metabolites in trapezius muscle are affected by acute tissue trauma is unknown. Hence, this study investigated the metabolic response and nociceptive reaction of the tissue following MD probe insertion in patients with CMP and healthy individuals...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319607/longitudinal-resting-state-functional-magnetic-resonance-imaging-in-a-mouse-model-of-metastatic-bone-cancer-reveals-distinct-functional-reorganizations-along-a-developing-chronic-pain-state
#8
David Buehlmann, Joanes Grandjean, Jael Xandry, Markus Rudin
Functional neuroimaging has emerged as attractive option for characterizing pain states complementing behavioral readouts or clinical assessment. In particular, resting-state functional magnetic resonance imaging (rs-fMRI) enables monitoring of functional adaptations across the brain, for example, in response to chronic nociceptive input. We have used rs-fMRI in a mouse model of chronic pain from breast cancer-derived tibial bone metastases to identify pain-induced alterations in functional connectivity. Combined assessment of behavioral readouts allowed for defining a trajectory as model function for extracting pain-specific functional connectivity changes from the fMRI data reflective of a chronic pain state...
April 2018: Pain
https://www.readbyqxmd.com/read/29318860/-effect-of-transcutaneous-acupoint-electrical-stimulation-on-hemodynamic-fluctuation-caused-by-loosing-tourniquet-in-elderly-patients-undergoing-knee-joint-replacement
#9
Han-Sheng Liang, Yi Feng
OBJECTIVE: To observe the effect of transcutaneous acupoint electrical stimulation (TAES) on hemodynamic fluctuation caused by loosing tourniquet in the elderly patients undergoing knee joint replacement. METHODS: A total of 60 ASA (America Society Anesthesiologist) I or II elderly patients for elective knee joint replacement surgery were randomly divided into control group (30 cases) and TAES group (30 cases). Patients of both groups were treated by intravenous anesthesia, and monitored with bispectral index (BIS, between 45-60) for anesthesia depth, stroke volume variation (SVV) for fluid management, mean arterial pressure (MAP) and cardiac index (CI) for hemodynamic fluctuation evaluation, and with analgesia nociception index (ANI, between 50-70) for remifentanil dosage adjustment...
December 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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