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https://www.readbyqxmd.com/read/29222132/invasive-assessment-of-the-coronary-microvasculature-the-index-of-microcirculatory-resistance
#1
REVIEW
William F Fearon, Yuhei Kobayashi
Traditionally, invasive coronary physiological assessment has focused on the epicardial coronary artery. More recently, appreciation of the importance of the coronary microvasculature in determining patient outcomes has grown. Several invasive modalities for interrogating microvascular function have been proposed. Angiographic techniques have been limited by their qualitative and subjective nature. Doppler wire-derived coronary flow reserve has been applied in research studies, but its clinical role has been limited by its lack of reproducibility, its lack of a clear normal value, and the fact that it is not specific for the microvasculature but interrogates the entire coronary circulation...
December 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29221809/acute-pain-and-peripheral-sensitization-following-cautery-disbudding-in-1-and-4-week-old-calves
#2
Mirra Alessandro, Spadavecchia Claudia, Bruckmaier Rupert, Gutzwiller Andreas, Casoni Daniela
Acute pain and peripheral sensitization development after cautery disbudding was investigated in 33 calves administered preventive multimodal analgesia. The animals were assigned randomly to three groups: 1) Group SH (Control), undergoing sham disbudding at 1 and 4weeks of age; 2) Group ED (Early Disbudding), undergoing disbudding at 1week of age and sham disbudding at 4weeks of age; 3) Group LD (Late Disbudding), undergoing sham disbudding at 1week of age and disbudding at 4weeks of age. Physiological parameters (heart rate, respiratory rate, rectal temperature, invasive blood pressure, cortisol, β-endorphin, interleukin-1β, interleukin-6, tumor necrosis factor-α and haptoglobin plasmatic concentration), local variables (tactile sensitivity score, pressure pain thresholds and horn temperature), behavior and pain scores [multidimensional pain scale and visual analogue scale (VAS)] were assessed at baseline and at several pre-determined time points until 24h after disbudding...
December 5, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29219021/review-of-the-mechanism-of-action-for-supartz-fx-in-knee-osteoarthritis
#3
Roy D Altman, Vinod Dasa, Jun Takeuchi
Objective Summarize the biologic effects of Supartz FX for knee osteoarthritis (OA), the first worldwide clinically approved intra-articular (IA) hyaluronic acid (HA) product. Design To determine the mechanism of action from preclinical and clinical studies, a literature search was conducted of Supartz FX using academic databases from 1987 to 2016. Articles on Supartz FX that deal with its mechanisms of action were extracted, categorized, and reviewed. Results Supartz FX has 2 potential mechanisms of action: (1) biomechanical: IA Supartz FX directly improves the viscoelasticity and lubrication of synovial fluid; (2) physiologic: IA Supartz FX penetrates synovium and cartilage tissues to reach HA receptors on the surface of synoviocytes and chondrocytes...
January 2018: Cartilage
https://www.readbyqxmd.com/read/29218364/ultrasound-evaluation-of-stress-injuries-and-physiological-adaptations-in-the-fingers-of-adolescent-competitive-rock-climbers
#4
Kathryn Garcia, Diego Jaramillo, Erika Rubesova
BACKGROUND: The impact of high-intensity, repetitive training on the fingers of adolescent climbers is relatively unknown. OBJECTIVE: To evaluate this effect by ultrasound (US) and to confirm some findings by magnetic resonance imaging (MRI). MATERIALS AND METHODS: The US study was performed in 20 adolescent rock climbers (ages 10-17 years) and 6 non-climbing controls (ages 11-15 years). US was used to examine the third digit of the right hand for differences in thickness of soft tissue, flexor and extensor tendon, volar plate and bony and growth plate adaptations...
December 7, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29218071/composite-agency-semiotics-of-modularity-and-guiding-interactions
#5
Alexei A Sharov
Principles of constructivism are used here to explore how organisms develop tools, subagents, scaffolds, signs, and adaptations. Here I discuss reasons why organisms have composite nature and include diverse subagents that interact in partially cooperating and partially conflicting ways. Such modularity is necessary for efficient and robust functionality, including mutual construction and adaptability at various time scales. Subagents interact via material and semiotic relations, some of which force or prescribe actions of partners...
July 2017: Biosemiotics
https://www.readbyqxmd.com/read/29217439/in-patients-with-severe-peripheral-arterial-disease-revascularization-induced-improvement-in-lower-extremity-ischemia-can-be-detected-by-laser-speckle-contrast-imaging-of-the-fluctuation-in-blood-perfusion-after-local-heating
#6
Sotaro Katsui, Yoshinori Inoue, Yohei Yamamoto, Kimihiro Igari, Toshifumi Kudo, Hiroyuki Uetake
BACKGROUND: We previously reported the utility of the perfusion value fluctuation slope for detecting severe ischemia in the lower limb. Our approach was based on a thermal load test mimicking the well-known physiological reaction termed "cold-induced vasodilation," which is known to occur as a three-phase phenomenon. The slope parameter quantifies the decrease in perfusion values accompanying the relative cooling (third phase) following the transient increase in blood flow (second phase) induced by the applied thermal load...
December 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29212893/comparative-physiology-of-nociception-and-pain
#7
REVIEW
Lynne U Sneddon
The study of diverse animal groups allows us to discern the evolution of the neurobiology of nociception. Nociception functions as an important alarm system alerting the individual to potential and actual tissue damage. All animals possess nociceptors, and, in some animal groups, it has been demonstrated that there are consistent physiological mechanisms underpinning the nociceptive system. This review considers the comparative biology of nociception and pain from an evolutionary perspective.
January 1, 2018: Physiology
https://www.readbyqxmd.com/read/29212771/establishment-of-a-surgical-bile-duct-injection-technique-giving-direct-access-to-the-bile-ducts-for-studies-of-the-murine-biliary-tree
#8
Natalie Lie Berntsen, Bjarte Fosby, Laura Valestrand, Corey Tan, Henrik Reims, Elisabeth Schrumpf, Tom H Karlsen, Pål-Dag Line, Espen Melum
Cholangiopathies are progressive disorders with largely unknown pathoetiology and limited treatment options. We aimed to develop a novel surgical technique with direct access to the bile ducts that would complement existing mouse models of cholestasis, biliary inflammation and fibrosis, and present a new route of administration for testing of potential treatment strategies. We developed a surgical technique to access the murine biliary tree by injection of different solvents through catheterization of the gall bladder with simultaneous clamping of the common bile duct...
December 6, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29212578/to-treat-or-not-to-treat-the-effects-of-pain-on-experimental-parameters
#9
Norman C Peterson, Elizabeth A Nunamaker, Patricia V Turner
A common dilemma faced by all animal bioethics committees arises when exceptions are proposed to the use of analgesics in painful procedures. The committee and researcher must weigh the possible confounding effects of including additional drugs (analgesics) in their treatment regimen against the moral obligation to perform humane research. Often neglected in these considerations are the potential confounding effects of unrelieved pain and consistency with pain-relieving practices in human medicine. In this review, we summarize what is currently known regarding the molecular and physiologic effects of pain and analgesics in common animal models used across several therapeutic areas...
December 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/29210760/a-pilot-study-of-responses-to-suctioning-among-neonates-on-bubble-nasal-continuous-positive-airway-pressure
#10
Michele Sweet, Debra Armbruster, Erin Bainbridge, Brianna Reiner, Alai Tan, Esther Chipps
BACKGROUND: Maintenance of a patent airway while the neonate is on nasal continuous positive airway pressure (nasal CPAP) requires vigilant monitoring and oral/nasopharyngeal suctioning. Currently, no evidence-based guidelines for safe suctioning in neonates while on bubble nasal CPAP have been published. PURPOSE: (1) To characterize the clinical and behavioral responses of neonates on bubble nasal CPAP in a level III neonatal intensive care unit following routine oral and nasopharyngeal suctioning...
December 2017: Advances in Neonatal Care: Official Journal of the National Association of Neonatal Nurses
https://www.readbyqxmd.com/read/29209250/mental-simulation-of-painful-situations-has-an-impact-on-posture-and-psychophysiological-parameters
#11
Thierry Lelard, Olivier Godefroy, Said Ahmaidi, Pierre Krystkowiak, Harold Mouras
Embodiment is made possible by the ability to imagine ourselves in a particular situation (mental simulation). Postural changes have been demonstrated in response to painful situations, but the effect of an implicit instruction has not been studied. The present study was designed to record differential responses according to whether or not subjects were instructed to imagine themselves in a painful or non-painful situation. Painful stimuli and instructions to mentally simulate the displayed situation were hypothesized to induce postural changes that could be demonstrated by changes in the center of pressure (COP) trajectory compared to viewing the same stimuli with no instructions...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29203993/minimally-invasive-surgery-for-rectal-cancer-current-status-and-future-perspectives
#12
REVIEW
Chinock Cheong, Nam Kyu Kim
Although laparoscopic resection for colon cancer has been proven safe and feasible when compared with open resection, currently no clear evidence is available regarding minimally invasive surgery for rectal cancer. This type of surgery may benefit patients by allowing fast recovery of normal dietary intake and bowel function, reduced postoperative pain, and shorter hospitalization. Therefore, minimally invasive surgeries such as laparoscopic or robot surgery have become the predominant treatment option for colon cancer...
December 2017: Indian Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29203121/using-a-memory-systems-lens-to-view-the-effects-of-estrogens-on-cognition-implications-for-human-health
#13
Donna L Korol, Wei Wang
Understanding the organizing and activating effects of gonadal steroids on adult physiology can guide insight into sex differences in and hormonal influences on health and disease, ranging from diabetes and other metabolic disorders, emotion and stress regulation, substance abuse, pain perception, immune function and inflammation, cognitive function and dysfunction accompanying neurological disorders. Because the brain is highly sensitive to many forms of estrogens, it is not surprising that many adult behaviors, including cognitive function, are modulated by estrogens...
December 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29200428/low-empathy-like-behaviour-in-male-mice-associates-with-impaired-sociability-emotional-memory-physiological-stress-reactivity-and-variations-in-neurobiological-regulations
#14
Giovanni Laviola, Francesca Zoratto, Danilo Ingiosi, Valentina Carito, Damien Huzard, Marco Fiore, Simone Macrì
Deficits in empathy have been proposed to constitute a hallmark of several psychiatric disturbances like conduct disorder, antisocial and narcissistic personality disorders. Limited sensitivity to punishment, shallow or deficient affect and reduced physiological reactivity to environmental stressors have been often reported to co-occur with limited empathy and contribute to the onset of antisocial phenotypes. Empathy in its simplest form (i.e. emotional contagion) is addressed in preclinical models through the evaluation of the social transmission of emotional states: mice exposed to a painful stimulus display a higher response if in the presence of a familiar individual experiencing a higher degree of discomfort, than in isolation...
2017: PloS One
https://www.readbyqxmd.com/read/29199560/lion-s-mane-medicinal-mushroom-hericium-erinaceus-agaricomycetes-modulates-purinoceptor-coupled-calcium-signaling-and-murine-nociceptive-behavior
#15
Pei-Shan Liu, Sheau-Huei Chueh, Chin-Chu Chen, Li-Ya Lee, Li-Yen Shiu
Hericium erinaceus is well known for the neurotrophic effect it confers by promoting nerve growth factor biosynthesis. We discovered a novel bioactivity of H. erinaceus in its ability to suppress adenosine triphosphate (ATP)-induced calcium signaling in neuronal PC12 cells. ATP, known primarily as a neurotransmitter, also acts on purinoceptors (P2 purinergic receptor [P2R]) to generate the cellular calcium signaling and secretion that mediate P2R physiological manifestations, including pain. Chronic pain reduces quality of life...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29199161/indications-of-24-h-esophageal-ph-monitoring-capsule-ph-monitoring-combined-ph-monitoring-with-multichannel-impedance-esophageal-manometry-radiology-and-scintigraphy-in-gastroesophageal-reflux-disease
#16
Rukiye Vardar, Muharrem Keskin
Ambulatory esophageal pH monitoring is an essential method in patients exhibiting signs of non-erosive reflux disease (NERD) to make an objective diagnosis. Intra-esophageal pH monitoring is important in patients who are non-responsive to medications and in those with extraesophageal symptoms, particularly in NERD, before surgical interventions. With the help of the wireless capsule pH monitoring, measurements can be made under more physiological conditions as well as longer recordings can be performed because the investigation can be better tolerated by patients...
December 2017: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29199079/nociceptive-cortical-activity-is-dissociated-from-nociceptive-behavior-in-newborn-human-infants-under-stress
#17
Laura Jones, Lorenzo Fabrizi, Maria Laudiano-Dray, Kimberley Whitehead, Judith Meek, Madeleine Verriotis, Maria Fitzgerald
Newborn infants display strong nociceptive behavior in response to tissue damaging stimuli, and this is accompanied by nociceptive activity generated in subcortical and cortical areas of the brain [1, 2]. In the absence of verbal report, these nociceptive responses are used as measures of pain sensation in newborn humans, as they are in animals [3, 4]. However, many infants are raised in a physiologically stressful environment, and little is known about the effect of background levels of stress upon their pain responses...
November 23, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29193492/perfusion-measures-for-symptom-severity-and-differential-outcome-of-revascularization-in-limb-ischemia-preliminary-results-with-arterial-spin-labeling-reactive-hyperemia
#18
Hou-Jen Chen, Trisha L Roy, Graham A Wright
BACKGROUND: Previously, a theoretical model based on microvascular physiology was established to facilitate the interpretation of calf perfusion dynamics recorded by arterial spin labeling (ASL). PURPOSE: To investigate the clinical relevance of novel perfusion indices by comparing them to the symptoms, response to revascularization, and short-term functional outcome in patients with peripheral arterial disease (PAD). STUDY TYPE: Prospective cohort study...
November 28, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29191101/despite-worse-baseline-status-depressed-patients-achieved-outcomes-similar-to-those-in-nondepressed-patients-after-surgery-for-cervical-deformity
#19
Gregory W Poorman, Peter G Passias, Samantha R Horn, Nicholas J Frangella, Alan H Daniels, D Kojo Hamilton, Hanjo Kim, Daniel Sciubba, Bassel G Diebo, Cole A Bortz, Frank A Segreto, Michael P Kelly, Justin S Smith, Brian J Neuman, Christopher I Shaffrey, Virginie LaFage, Renaud LaFage, Christopher P Ames, Robert Hart, Gregory M Mundis, Robert Eastlack
OBJECTIVE Depression and anxiety have been demonstrated to have negative impacts on outcomes after spine surgery. In patients with cervical deformity (CD), the psychological and physiological burdens of the disease may overlap without clear boundaries. While surgery has a proven record of bringing about significant pain relief and decreased disability, the impact of depression and anxiety on recovery from cervical deformity corrective surgery has not been previously reported on in the literature. The purpose of the present study was to determine the effect of depression and anxiety on patients' recovery from and improvement after CD surgery...
December 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/29188681/targeted-muscle-reinnervation-for-improved-control-of-myoelectric-upper-limb-prostheses
#20
G Vadalà, G Di Pino, L Ambrosio, L Diaz Balzani, V Denaro
Targeted muscle reinnervation (TMR) is a novel surgical technique developed to improve the control of myoelectric upper limb prostheses. Nerves transected by the amputation, which retain their original motor pathways even after being severed, are redirected to residual denervated muscles that serve as target for consequent reinnervation. Once the process is complete, reinnervated muscles will contract upon voluntary activation of transferred nerves while attempting to move missing regions of the amputated limb, generating EMG signals that can be recorded and used to control a prosthetic device...
October 2017: Journal of Biological Regulators and Homeostatic Agents
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