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https://www.readbyqxmd.com/read/29301706/an-experimental-study-and-finite-element-modeling-of-head-and-neck-cooling-for-brain-hypothermia
#1
Hui Li, Roland K Chen, Yong Tang, William Meurer, Albert J Shih
Reducing brain temperature by head and neck cooling is likely to be the protective treatment for humans when subjects to sudden cardiac arrest. This study develops the experimental validation model and finite element modeling (FEM) to study the head and neck cooling separately, which can induce therapeutic hypothermia focused on the brain. Anatomically accurate geometries based on CT images of the skull and carotid artery are utilized to find the 3D geometry for FEM to analyze the temperature distributions and 3D-printing to build the physical model for experiment...
January 2018: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29288014/efficacy-of-different-cooling-technologies-for-therapeutic-temperature-management-a-prospective-intervention-study
#2
Petra Sonder, Gladys N Janssens, Albertus Beishuizen, Connie L Henry, Jon C Rittenberger, Clifton W Callaway, Cameron Dezfulian, Kees H Polderman
BACKGROUND: Mild therapeutic hypothermia (32-36 °C) is associated with improved outcomes in patients with brain injury after cardiac arrest (CA). Various devices are available to induce and maintain hypothermia, but few studies have compared the performance of these devices. We performed a prospective study to compare four frequently used cooling systems in inducing and maintaining hypothermia followed by controlled rewarming. METHODS: We performed a prospective multi-centered study in ten ICU's in three hospitals within the UPMC health system...
December 26, 2017: Resuscitation
https://www.readbyqxmd.com/read/29247482/commonalities-in-epileptogenic-processes-from-different-acute-brain-insults-do-they-translate
#3
REVIEW
Pavel Klein, Raymond Dingledine, Eleonora Aronica, Christophe Bernard, Ingmar Blümcke, Detlev Boison, Martin J Brodie, Amy R Brooks-Kayal, Jerome Engel, Patrick A Forcelli, Lawrence J Hirsch, Rafal M Kaminski, Henrik Klitgaard, Katja Kobow, Daniel H Lowenstein, Phillip L Pearl, Asla Pitkänen, Noora Puhakka, Michael A Rogawski, Dieter Schmidt, Matti Sillanpää, Robert S Sloviter, Christian Steinhäuser, Annamaria Vezzani, Matthew C Walker, Wolfgang Löscher
The most common forms of acquired epilepsies arise following acute brain insults such as traumatic brain injury, stroke, or central nervous system infections. Treatment is effective for only 60%-70% of patients and remains symptomatic despite decades of effort to develop epilepsy prevention therapies. Recent preclinical efforts are focused on likely primary drivers of epileptogenesis, namely inflammation, neuron loss, plasticity, and circuit reorganization. This review suggests a path to identify neuronal and molecular targets for clinical testing of specific hypotheses about epileptogenesis and its prevention or modification...
December 15, 2017: Epilepsia
https://www.readbyqxmd.com/read/29225557/toward-the-development-of-a-flexible-mesoscale-mri-compatible-neurosurgical-continuum-robot
#4
Yeongjin Kim, Shing Shin Cheng, Mahamadou Diakite, Rao P Gullapalli, J Marc Simard, Jaydev P Desai
Brain tumor, be it primary or metastatic, is usually life threatening for a person of any age. Primary surgical resection which is one of the most effective ways of treating brain tumors can have tremendously increased success rate if the appropriate imaging modality is used for complete tumor resection. Magnetic resonance imaging (MRI) is the imaging modality of choice for brain tumor imaging because of its excellent soft-tissue contrast. MRI combined with continuum soft robotics has immense potential to be the next major technological breakthrough in the field of brain cancer diagnosis and therapy...
December 2017: IEEE Transactions on Robotics: a Publication of the IEEE Robotics and Automation Society
https://www.readbyqxmd.com/read/29205169/potential-for-thermal-damage-to-the-blood-brain-barrier-during-craniotomy-procedure-implications-for-intracortical-recording-microelectrodes
#5
Andrew Shoffstall, Jennifer Paiz, David Miller, Griffin Rial, Mitchell Willis, Dhariyat Menendez, Stephen Hostler, Jeffrey R Capadona
Our objective was to determine how readily blood-brain barrier (BBB) disruption occurred as a result of bone drilling during a craniotomy to implant microelectrodes in rat cortex. While the phenomenon of heat production during bone-drilling is well-known, practices to evade damage to the underlying brain tissue are inconsistently practiced and reported in the literature. Approach: We conducted a review of intracortical microelectrode literature to summarize typical approaches to mitigate drill heating during rodent craniotomies...
December 5, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29200996/regulation-of-brown-adipose-tissue-activity-by-interoceptive-cns-pathways-the-interaction-between-brain-and-periphery
#6
Otto Muzik, Vaibhav A Diwadkar
To maintain thermal homeostasis, specific thermogenic tissues are under the control of central thermoregulatory networks that regulate the body's response to thermal challenges. One of these mechanisms involves non-shivering thermogenesis in brown adipose tissue (BAT), which is activated in cold environments in order to defend the body against physical damage as a result of hypothermia. The objective of our study was to assess the interaction between CNS thermoregulatory pathways and sympathetic innervation in BAT during a cold exposure paradigm...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29200946/combined-hemorrhagic-shock-and-unilateral-common-carotid-occlusion-induces-neurological-injury-in-adult-male-rats
#7
Chung-Ching Chio, Chien-Chin Hsu, Yu-Feng Tian, Chung-Han Wang, Mao-Tsun Lin, Ching-Ping Chang, Hung-Jung Lin
Background: Clinical assessment reveals that patients after surgery of cardiopulmonary bypass or coronary bypass experience postoperative cognitive dysfunction. This study aimed to investigate whether resuscitation after a hemorrhagic shock (HS) and/or mild cerebral ischemia caused by a unilateral common carotid artery occlusion (UCCAO) can cause brain injury and concomitant neurological dysfunction, and explore the potential mechanisms. Methods: Blood withdrawal (6 mL/100 g body weight) for 60 min through the right jugular vein catheter-induced an HS...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29192867/reduction-of-hyperthermia-in-pediatric-patients-with-severe-traumatic-brain-injury-a-quality-improvement-initiative
#8
Marlina E Lovett, Melissa Moore-Clingenpeel, Onsy Ayad, Nicole O'Brien
OBJECTIVE Severe traumatic brain injury remains a leading cause of morbidity and mortality in the pediatric population. Providers focus on reducing secondary brain injury by avoiding hypoxemia, avoiding hypotension, providing normoventilation, treating intracranial hypertension, and reducing cerebral metabolic demand. Hyperthermia is frequently present in patients with severe traumatic brain injury, contributes to cerebral metabolic demand, and is associated with prolonged hospital admission as well as impaired neurological outcome...
December 1, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29187242/statistical-analysis-plan-for-the-eurohyp-1-trial-european-multicentre-randomised-phase-iii-clinical-trial-of-the-therapeutic-hypothermia-plus-best-medical-treatment-versus-best-medical-treatment-alone-for-acute-ischaemic-stroke
#9
Per Winkel, Philip M Bath, Christian Gluud, Jane Lindschou, H Bart van der Worp, Malcolm R Macleod, Istvan Szabo, Isabelle Durand-Zaleski, Stefan Schwab
BACKGROUND: Cooling may reduce infarct size and improve neurological outcomes in patients with ischaemic stroke. In phase II trials, cooling awake patients with ischaemic stroke has been shown to be feasible and safe, but the effects in functional outcomes has not yet been investigated in an adequately sized randomised clinical trial. METHODS/DESIGN: The EuroHYP-1 trial is a multinational, randomised, superiority phase III clinical trial with masked outcome assessment testing the benefits and harms of therapeutic cooling in awake adult patients with acute ischaemic stroke...
November 29, 2017: Trials
https://www.readbyqxmd.com/read/29176756/cryogenic-3d-printing-of-super-soft-hydrogels
#10
Zhengchu Tan, Cristian Parisi, Lucy Di Silvio, Daniele Dini, Antonio Elia Forte
Conventional 3D bioprinting allows fabrication of 3D scaffolds for biomedical applications. In this contribution we present a cryogenic 3D printing method able to produce stable 3D structures by utilising the liquid to solid phase change of a composite hydrogel (CH) ink. This is achieved by rapidly cooling the ink solution below its freezing point using solid carbon dioxide (CO2) in an isopropanol bath. The setup was able to successfully create 3D complex geometrical structures, with an average compressive stiffness of O(1) kPa (0...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29166361/the-impact-of-hepatectomy-time-of-the-liver-graft-on-post-transplant-outcome-a-eurotransplant-cohort-study
#11
Ina Jochmans, Steffen Fieuws, Ineke Tieken, Undine Samuel, Jacques Pirenne
OBJECTIVE: Assessing the effect of donor hepatectomy time on outcome after transplantation. SUMMARY OF BACKGROUND DATA: When blood supply in a deceased organ donor stops, ischemic injury starts. Livers are cooled to reduce cellular metabolism and minimize ischemic injury. This cooling is slow and livers are lukewarm during hepatectomy, potentially affecting outcome. METHODS: We used the Eurotransplant Registry to investigate the relationship between donor hepatectomy time and post-transplant outcome in 12,974 recipients of deceased-donor livers (January 1, 2004, to December 31, 2013)...
November 21, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/29164310/relevance-of-trpa1-and-trpm8-channels-as-vascular-sensors-of-cold-in-the-cutaneous-microvasculature
#12
REVIEW
Y Pan, D Thapa, L Baldissera, F Argunhan, A A Aubdool, S D Brain
Cold exposure is directly related to skin conditions, such as frostbite. This is due to the cold exposure inducing a vasoconstriction to reduce cutaneous blood flow and protect against heat loss. However, a long-term constriction will cause ischaemia and potentially irreversible damage. We have developed techniques to elucidate the mechanisms of the vascular cold response. We focused on two ligand-gated transient receptor potential (TRP) channels, namely, the established "cold sensors" TRP ankyrin 1 (TRPA1) and TRP melastin (TRPM8)...
November 21, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29147585/acute-exercise-and-neurocognitive-development-in-preadolescents-and-young-adults-an-erp-study
#13
Chien-Heng Chu, Arthur F Kramer, Tai-Fen Song, Chih-Han Wu, Tsung-Min Hung, Yu-Kai Chang
The purpose of this study was to examine the effect of a single bout of exercise on neurocognitive function in preadolescent children and young adults by determining the modulatory role of age and the neuroelectrical mechanism(s) underlying the association between acute exercise and executive function. Twenty preadolescents and 20 young adults completed the Stroop test, and neuroelectrical activity was recorded during two treatment sessions performed in a counterbalanced order. Exercise treatments involved moderate intensity aerobic exercise for 20 min as the main exercise and two 5 min periods of warm-up and cool-down...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/29125053/twenty-minutes-of-normothermic-cardiac-arrest-in-a-pig-model-the-role-of-short-term-hypothermia-for-neurological-outcome
#14
Katharina Foerster, Christoph Benk, Friedhelm Beyersdorf, Heidi Cristina Schmitz, Karin Wittmann, Itumeleng Taunyane, Claudia Heilmann, Georg Trummer
INTRODUCTION: Cardiopulmonary resuscitation restores circulation, but with inconsistent blood-flow and pressures. Our recent approach using an extracorporeal life support system, named "controlled integrated resuscitation device" (CIRD), may lead to improved survival and neurological recovery after cardiac arrest (CA). The basic idea is to provide a reperfusion tailored to the individual patient by control of the conditions of reperfusion and the composition of the reperfusate. Hypothermia is one aspect of this concept...
November 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29123858/development-of-new-equipment-for-intra-arrest-brain-cooling-that-uses-cooled-oxygen-in-the-lungs-volunteer-study
#15
Atsushi Sakurai, Rumi Tagami, Shingo Ihara, Junko Yamaguchi, Atsunori Sugita, Nami Sawada, Tomohide Komatsu, Satoshi Hori, Kosaku Kinoshita
Aims: Many experimental studies have reported that intra-arrest cooling during cardiac arrest is a promising treatment to mitigate brain injury. However, there is no clinically established method for cooling the brain during cardiac arrest. We hypothesized that, as blood flow in the lungs must be very slow during cardiopulmonary resuscitation, the blood could be cooled by ventilating the lungs with cooled oxygen like a radiator, and that this cooled blood would in turn cool the brain...
April 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29119455/ct-brain-artefact-due-to-air-bubbles-in-the-oil-cooling-system-characteristic-band-like-configuration-on-sagittal-reformatted-image
#16
Simon Sin Man Wong, James Siu Wai Cheung, Tom Wai Kin Lee, Chris Siu Chun Tsai, Alex Wing Hung Ng
PURPOSE: To retrospectively review the imaging characteristics of CT artefacts due to air bubbles within the oil cooling system of the X-ray tube housing. MATERIALS AND METHODS: Air bubbles were introduced into the oil cooling system of the X-ray tube housing during tube replacement in one of the CT scanners in the authors' institution. All 126 CT brain studies performed in this period were retrospectively reviewed. One hundred and four studies were negative for artefacts...
November 8, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29105854/simultaneous-determination-and-tissue-distribution-studies-of-four-phenolic-acids-in-rat-tissue-by-uflc-ms-ms-after-intravenous-administration-of-salvianolic-acid-for-injection
#17
Shuang Li, Xiuman Xie, Dongxiang Li, Zhiguo Yu, Ling Tong, Yunli Zhao
A rapid, simple and sensitive ultra-fast liquid chromatography tandem mass spectrometric method was developed and validated for simultaneous determination and tissue distribution studies of rosmarinic acid, salvianolic acid D, lithospermic acid and salvianolic acid B in rats after intravenous administration of salvianolic acid for injection. The tissue homogenate samples were pretreated by protein precipitation with pre-cooled acetonitrile. Chromatographic separation was achieved on a Waters Cortecs UPLC C18 column (1...
November 6, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29099343/feasibility-study-of-a-novel-high-flow-cold-air-cooling-protocol-of-the-porcine-brain-using-mri-temperature-mapping
#18
Jan Sedlacik, Åsmund Kjørstad, Zsuzsanna Nagy, Jan-Hendrik Buhk, Christoph R Behem, Constantin J Trepte, Jens Fiehler, Fabian Temme
Early, prehospital cooling seeks to reduce and control the body temperature as early as possible to protect the brain and improve patient outcome in cardiac arrest, stroke, and traumatic brain injury. In this study, we investigate the feasibility of localized cooling of the porcine brain by using a novel high-flow cold air protocol, which utilizes the close proximity between the nasal cavity and the brain. Five adult pigs were anesthetized and temperature change was mapped before, during, and after cooling by using the proton resonance frequency method on a 3 T Siemens Magnetom Skyra system...
November 3, 2017: Therapeutic Hypothermia and Temperature Management
https://www.readbyqxmd.com/read/29059865/design-of-focal-brain-cooling-system-for-suppressing-epileptic-seizures
#19
Kei Hata, Koichi Fujiwara, Manabu Kano, Takao Inoue, Sadahiro Nomura, Hirochika Imoto, Michiyasu Suzuki
Epilepsy is a group of diseases caused by excessive neuronal activities, and one-quarter of the patients do not become seizure-free by the existing treatments. The potential treatments include focal brain cooling, which aims to cool the region where the excessive neuronal activities begin. We are developing a focal brain cooling system. The system delivers cold saline to a cranially implanted cooling device. The outflow is cooled by a Peltier device and pumped for circulation. The Peltier device and the pump are activated only when a seizure is predicted...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29040750/cool-callous-and-in-control-superior-inhibitory-control-in-frequent-players-of-video-games-with-violent-content
#20
Laura Stockdale, Robert G Morrison, Robert Palumbo, James Garbarino, Rebecca L Silton
Research on the effects of media violence exposure has shown robust associations among violent media exposure, increased aggressive behavior, and decreased empathy. Preliminary research indicates that frequent players of violent video games may have differences in emotional and cognitive processes compared to infrequent or non-players, yet research examining the amount and content of game play and the relation of these factors with affective and cognitive outcomes is limited. The present study measured neural correlates of response inhibition in the context of implicit attention to emotion, and how these factors are related to empathic responding in frequent and infrequent players of video games with graphically violent content...
October 4, 2017: Social Cognitive and Affective Neuroscience
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