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Pain physiology

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https://www.readbyqxmd.com/read/29053883/pharmacokinetics-of-inorganic-cobalt-and-a-vitamin-b12-supplement-in-the-thoroughbred-horse-differentiating-cobalt-abuse-from-supplementation
#1
L L Hillyer, Z Ridd, S Fenwick, P Hincks, S W Paine
BACKGROUND: Whilst cobalt is an essential micronutrient for vitamin B12 synthesis in the horse, at supra-physiological concentrations it has been shown to enhance performance in humans and rats and there is evidence that its administration in high doses to horses poses a welfare threat. Animal sport regulators currently control cobalt abuse via international race day thresholds, but since cobalt may be present in physiological concentrations this work was initiated to explore means of potentially adding to application of those thresholds...
October 20, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29053875/current-state-of-the-surgical-treatment-of-terminal-neuromas
#2
Graham C Ives, Theodore A Kung, Bao Tram Nghiem, Daniel C Ursu, David L Brown, Paul S Cederna, Stephen W P Kemp
Painful terminal neuromas resulting from nerve injury following amputation are common. However, there is currently no universally accepted gold standard of treatment for this condition. A comprehensive literature review is presented on the treatment of terminal neuromas. Four categories of terminal neuroma surgical procedures are assessed: epineurial closure; nerve transposition with implantation; neurorrhaphy, and alternate target reinnervation. Significant patient and case studies are highlighted in each section, focusing on surgical technique and patient outcome metrics...
October 19, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29053848/is-virtual-reality-ready-for-prime-time-in-the-medical-space-a-randomized-control-trial-of-pediatric-virtual-reality-for-acute-procedural-pain-management
#3
Jeffrey I Gold, Nicole E Mahrer
Objective: To conduct a randomized control trial to evaluate the feasibility and efficacy of virtual reality (VR) compared with standard of care (SOC) for reducing pain, anxiety, and improving satisfaction associated with blood draw in children ages 10-21 years. Methods: In total, 143 triads (patients, their caregiver, and the phlebotomist) were recruited in outpatient phlebotomy at a pediatric hospital and randomized to receive either VR or SOC when undergoing routine blood draw...
October 19, 2017: Journal of Pediatric Psychology
https://www.readbyqxmd.com/read/29053719/total-disc-replacement-using-tissue-engineered-intervertebral-discs-in-the-canine-cervical-spine
#4
Yu Moriguchi, Jorge Mojica-Santiago, Peter Grunert, Brenton Pennicooke, Connor Berlin, Thamina Khair, Rodrigo Navarro-Ramirez, Rodolfo J Ricart Arbona, Joseph Nguyen, Roger Härtl, Lawrence J Bonassar
The most common reason that adults in the United States see their physician is lower back or neck pain secondary to degenerative disc disease. To date, approaches to treat degenerative disc disease are confined to purely mechanical devices designed to either eliminate or enable flexibility of the diseased motion segment. Tissue engineered intervertebral discs (TE-IVDs) have been proposed as an alternative approach and have shown promise in replacing native IVD in the rodent tail spine. Here we demonstrate the efficacy of our TE-IVDs in the canine cervical spine...
2017: PloS One
https://www.readbyqxmd.com/read/29051890/considerations-for-pediatric-burn-sedation-and-analgesia
#5
REVIEW
Alice Fagin, Tina L Palmieri
Burn patients experience anxiety and pain in the course of their injury, treatment, and recovery. Hence, treatment of anxiety and pain is paramount after burn injury. Children, in particular, pose challenges in anxiety and pain management due to their unique physiologic, psychologic, and anatomic status. Burn injuries further complicate pain management and sedation as such injuries can have effects on medication response and elimination. Burn injuries further complicate pain management and sedation as such injuries can have effects on medication response and elimination...
2017: Burns and trauma
https://www.readbyqxmd.com/read/29045952/-progress-in-diagnosis-and-management-of-syncope-in-children
#6
W R Xu, Y Liao, H F Jin, Q Y Zhang, C S Tang, J B DU
Syncope is a common emergency of children and adolescents, which has serious influence on the quality of life. Neurally-mediated syncope, including postural tachycardia syndrome, vasovagal syncope, orthostatic hypotension and orthostatic hypertension, is the main cause of syncope in children and adolescents. The main manifestations of neurally-mediated syncope are diverse, such as dizziness, headache, chest tightness, chest pain, pale complexion, fatigue, pre-syncope and syncope. Although the clinical manifestations are similar, each subtype of syncope has its hemodynamic feature and optimal treatment option...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29043208/phosphaturic-mesenchymal-tumor-pmt-exceptionally-rare-disease-yet-crucial-not-to-miss
#7
Amir Ghorbani-Aghbolaghi, Morgan Angus Darrow, Tao Wang
Phosphaturic mesenchymal tumors (PMTs) are very rare tumors which are frequently associated with Tumor Induced Osteomalacia (TIO), a paraneoplastic syndrome that manifests as renal phosphate wasting. The tumor cells produce a peptide hormone-like substance known as fibroblast growth factor 23 (FGF23), a physiologic regulator of phosphate levels. FGF23 decreases proximal tubule reabsorption of phosphates and inhibits 1-α-hydroxylase, which reduces levels of 1-α, 25-dihydroxyvitamine D3. Thus, overexpression of FGF23 by the tumor cells leads to increased excretion of phosphate in the urine, mobilization of calcium and phosphate from bones, and the reduction of osteoblastic activity, ultimately resulting in widespread osteomalacia...
July 2017: Autopsy & case reports
https://www.readbyqxmd.com/read/29042065/analgesic-and-anxiolytic-effects-of-leu-31-pro-34-neuropeptide-y-microinjected-into-the-periaqueductal-gray-in-rats
#8
Priscila Vázquez-León, Luis G Mendoza-Ruiz, Eduardo Ramírez-San Juan, German Alberto Chamorro-Cevallos, Abraham Miranda-Páez
Several reports have demonstrated that neuropeptide Y (NPY) is involved in food intake, epilepsy, circadian rhythms, drug seeking, pain and anxiety, and other physiological or pathological conditions. On the other hand, periaqueductal gray (PAG) is a key brain center for modulating pain, anxiety and fear. It is the main structure implicated in integrated defensive behaviors. One such behavior, tonic immobility (TI), resembles fear and is able to induce analgesia. After microinjection of [Leu(31),Pro(34)]-Neuropeptide Y ([Leu(31),Pro(34)]-NPY) into the PAG dorsal (D) or ventrolateral (VL) of adult male Wistar rats, the following parameters were assessed: i) the analgesic effect by means of the tail-flick test (TF), ii) the duration of TI as a passive defensive behavioral response and as an anxiety/fear model (considering both TF and TI as single behaviors), iii) TI-induced analgesia by the combination of TF/TI, and iv) the anxious-like state through the elevated plus maze (EPM), and defensive burying behavior (DBB)...
October 12, 2017: Neuropeptides
https://www.readbyqxmd.com/read/29035598/rpe-during-concentric-and-eccentric-cycling-are-we-measuring-effort-or-exertion
#9
Luis Peñailillo, Karen Mackay, Chris R Abbiss
Despite the terms often being used interchangeably it has been suggested that perceptions of effort and perceptions of exertion may differ. Eccentric cycling may provide a model of exercise by which differences between these perceptions can be examined. PURPOSE: of this study was to examine and compare perceptions of effort and exertion during eccentric and concentric cycling at four intensities. METHODS: Ten healthy male participants (mean ± SD; age: 29.8 ± 2...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29034255/perioperative-management-of-elderly-patients-with-gastrointestinal-malignancies-the-contribution-of-anesthesia
#10
REVIEW
Rudolf Mörgeli, Kathrin Scholtz, Johannes Kurth, Sascha Treskatsch, Bruno Neuner, Susanne Koch, Lutz Kaufner, Claudia Spies
INTRODUCTION: Elderly patients suffering from gastrointestinal malignancies are particularly prone to perioperative complications. Elderly patients often present with reduced physiological reserves, and comorbidities can limit treatment options and promote complications. Surgeons and anesthesiologists must be aware of strategies required to deal with this vulnerable subgroup. METHODS: We provide a brief review of current and emerging perioperative strategies for the treatment of elderly patients with gastrointestinal malignancies and frequent comorbidities...
August 2017: Visceral Medicine
https://www.readbyqxmd.com/read/29032948/anxiety-and-pain-related-to-mandibular-block-injections-comparison-of-self-reported-measures-and-physiological-response
#11
Jacco G Tuk, Jerome A Lindeboom, Linda Hoogendoorn, Byron W Taylor, Arjen J van Wijk
OBJECTIVE: The aim of this study was to determine whether patients with a pain score ≥7 (high pain group) after a mandibular block injection had a higher physiologic response compared with patients with scores <7 (low pain group). STUDY DESIGN: Before oral surgery, patients (n = 66) filled out questionnaires to measure anxiety and expected pain. The questionnaires also assessed patients' experiences with dental injections and dental anxiety, as well as their emotional state and intensity of anxiety...
September 6, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29032938/the-jak-stat-signaling-pathway-and-photobiomodulation-in-chronic-wound-healing
#12
Sandy W Jere, Heidi Abrahamse, Nicolette N Houreld
Wound healing is a physiological process that occurs in overlapping phases namely hemostasis, inflammation, proliferation, and remodeling. Chronic wounds fail to proceed through these reparative processes to achieve the functional integrity within the expected time. Wound healing relies upon growth factors and cytokines for the precise and accurate regulation of cellular responses. These are achieved through the use of complex growth factor/cytokine induced signaling pathways. The Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway transmits extracellular signals to the nucleus for the transcription of genes involved in proliferation and differentiation, to name but a few...
October 6, 2017: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/29032916/combination-of-magnesium-sulphate-and-ropivacaine-epidural-analgesia-for-hip-arthroplasty-in-dogs
#13
Elena Lardone, Bruno Peirone, Chiara Adami
OBJECTIVE: The aim of this study was to determine whether lumbosacral epidural administration of magnesium sulphate added to ropivacaine prolongs and improves perioperative analgesia, without adverse effects on motor block duration or hind limb neurological function, in dogs undergoing hip arthroplasty. STUDY DESIGN: Investigator-blind, controlled, randomized, prospective clinical trial. ANIMALS: A group of 20 client-owned dogs undergoing hip arthroplasty were allocated randomly to either group C (control, 1 mg kg(-1)epidural ropivacaine) or group M (magnesium, epidural injection of 1 mg kg(-1) ropivacaine and 2 mg kg(-1)magnesium sulphate)...
June 16, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29032483/regulation-of-cardiac-voltage-gated-sodium-channel-by-kinases-roles-of-protein-kinases-a-and-c
#14
Ademuyiwa S Aromolaran, Mohamed Chahine, Mohamed Boutjdir
In the heart, voltage-gated sodium (Nav) channel (Nav1.5) is defined by its pore-forming α-subunit and its auxiliary β-subunits, both of which are important for its critical contribution to the initiation and maintenance of the cardiac action potential (AP) that underlie normal heart rhythm. The physiological relevance of Nav1.5 is further marked by the fact that inherited or congenital mutations in Nav1.5 channel gene SCN5A lead to altered functional expression (including expression, trafficking, and current density), and are generally manifested in the form of distinct cardiac arrhythmic events, epilepsy, neuropathic pain, migraine, and neuromuscular disorders...
October 15, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/29031589/implicit-evaluations-and-physiological-threat-responses-in-people-with-persistent-low-back-pain-and-fear-of-bending
#15
J P Caneiro, Peter O'Sullivan, Anne Smith, G Lorimer Moseley, Ottmar V Lipp
BACKGROUND AND AIMS: Pain and protective behaviour are dependent on implicit evaluations of danger to the body. However, current assessment of perceived danger relies on self-report, on information of which the person is aware and willing to disclose. To overcome this limitation, attempts have been made to investigate implicit evaluation of movement-related threatening images in people with persistent low back pain (PLBP) and pain-related fear. Lack of specificity of the sample and stimuli limited those explorations...
October 11, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29030935/rapid-response-team-activation-for-pediatric-patients-on-the-acute-pain-service
#16
Maxwell Teets, Dmitry Tumin, Hina Walia, Jenna Stevens, Sharon Wrona, David Martin, Tarun Bhalla, Joseph D Tobias
INTRODUCTION: Untreated pain or overly aggressive pain management may lead to adverse physiologic consequences and activation of the hospital's Rapid Response Team. This study is a quality improvement initiative that attempts to identify patient demographics and patterns associated with Rapid Response Team consultations for patients on the acute pain service. METHODS: A retrospective review of all patients on the acute pain service from February 2011 until June 2015 was cross-referenced with inpatients requiring consultation from the Rapid Response Team...
November 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29030410/shame-and-the-vulnerable-self-in-medical-contexts-the-compassionate-solution
#17
Paul Gilbert
Shame is a powerful experience that plays a vital role in a whole range of aspects of the clinical encounter. Shame experiences can have an impact on our psychological and physiological state and on how we experience ourselves, others and our relationships. The medical encounter is an obvious arena for shame because we are presenting (aspects of) our bodies and minds that can be seen as unattractive and undesirable, diseased, decayed and injured with the various excretions that typically might invite disgust...
October 13, 2017: Medical Humanities
https://www.readbyqxmd.com/read/29027912/guanidinium-toxins-and-their-interactions-with-voltage-gated-sodium-ion-channels
#18
REVIEW
Lorena M Durán-Riveroll, Allan D Cembella
Guanidinium toxins, such as saxitoxin (STX), tetrodotoxin (TTX) and their analogs, are naturally occurring alkaloids with divergent evolutionary origins and biogeographical distribution, but which share the common chemical feature of guanidinium moieties. These guanidinium groups confer high biological activity with high affinity and ion flux blockage capacity for voltage-gated sodium channels (NaV). Members of the STX group, known collectively as paralytic shellfish toxins (PSTs), are produced among three genera of marine dinoflagellates and about a dozen genera of primarily freshwater or brackish water cyanobacteria...
October 13, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29027199/characterization-of-a-mouse-model-of-sickle-cell-trait-parallels-to-human-trait-and-a-novel-finding-of-cutaneous-sensitization
#19
Katherine J Zappia, Yihe Guo, Dawn Retherford, Nancy J Wandersee, Cheryl L Stucky, Cheryl A Hillery
Sickle cell trait (SCT) has classically been categorized as a benign condition except in rare cases or upon exposure to severe physical conditions. However, several lines of evidence indicate that individuals with SCT are not always asymptomatic, and additional physiological changes and risks may remain unexplored. Here, we utilized mice harbouring one copy of normal human β globin and one copy of sickle human β globin as a model of SCT to assess haematological, histopathological and somatosensory outcomes...
October 12, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/29026686/pain-prediction-from-ecg-in-vascular-surgery
#20
Tricia Adjei, Wilhelm Von Rosenberg, Valentin Goverdovsky, Katarzyna Powezka, Usman Jaffer, Danilo P Mandic
Varicose vein surgeries are routine outpatient procedures, which are often performed under local anaesthesia. The use of local anaesthesia both minimises the risk to patients and is cost effective, however, a number of patients still experience pain during surgery. Surgical teams must therefore decide to administer either a general or local anaesthetic based on their subjective qualitative assessment of patient anxiety and sensitivity to pain, without any means to objectively validate their decision. To this end, we develop a 3-D polynomial surface fit, of physiological metrics and numerical pain ratings from patients, in order to model the link between the modulation of cardiovascular responses and pain in varicose vein surgeries...
2017: IEEE Journal of Translational Engineering in Health and Medicine
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