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Hypothermia

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https://www.readbyqxmd.com/read/27923323/mild-hypothermia-promotes-pericontusion-neuronal-sprouting-via-suppressing-socs3-expression-after-moderate-traumatic-brain-injury
#1
Cheng-Cheng Zhao, Chuan-Fang Wang, Wei-Ping Li, Yong Lin, Qi-Lin Tang, Jun-Feng Feng, Qing Mao, Guo-Yi Gao, Jiyao Jiang
Mild therapeutic hypothermia is a candidate for the treatment of traumatic brain injury (TBI). However, the role of mild hypothermia in neuronal sprouting after TBI remains obscure. We used a fluid percussion injury (FPI) model to assess the effect of mild hypothermia on pericontusion neuronal sprouting after TBI in rats. Male Sprague Dawley rats underwent FPI or sham surgery, and then followed by mild hypothermia treatment (33°C) or normothermia treatment (37°C) for 3 hours. All the rats were sacrificed at 7 days after FPI...
December 6, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27920725/controlled-reperfusion-strategies-improve-cardiac-hemodynamic-recovery-after-warm-global-ischemia-in-an-isolated-working-rat-heart-model-of-donation-after-circulatory-death-dcd
#2
Emilie Farine, Petra Niederberger, Rahel K Wyss, Natalia Méndez-Carmona, Brigitta Gahl, Georg M Fiedler, Thierry P Carrel, Hendrik T Tevaearai Stahel, Sarah L Longnus
Aims: Donation after circulatory death (DCD) could improve cardiac graft availability, which is currently insufficient to meet transplant demand. However, DCD organs undergo an inevitable period of warm ischemia and most cardioprotective approaches can only be applied at reperfusion (procurement) for ethical reasons. We investigated whether modifying physical conditions at reperfusion, using four different strategies, effectively improves hemodynamic recovery after warm ischemia. Methods and Results: Isolated hearts of male Wistar rats were perfused in working-mode for 20 min, subjected to 27 min global ischemia (37°C), and 60 min reperfusion (n = 43)...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27919274/altered-pharmacological-effects-of-adrenergic-agonists-during-hypothermia
#3
REVIEW
Erik Sveberg Dietrichs, Georg Sager, Torkjel Tveita
Rewarming from accidental hypothermia is often complicated by hypothermia-induced cardiac dysfunction, calling for immediate pharmacologic intervention. Studies show that although cardiac pharmacologic support is applied when rewarming these patients, a lack of updated treatment recommendations exist. Mainly due to lack of clinical and experimental data, neither of the international guidelines includes information about pharmacologic cardiac support at temperatures below 30 °C. However, core temperature of accidental hypothermia patients is often reduced below 30 °C...
December 5, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27917566/perioperative-hypothermia-in-neonatal-intensive-care-unit-patients-effectiveness-of-a-thermoregulation-intervention-and-associated-risk-factors
#4
Branden M Engorn, Stephanie L Kahntroff, Karen M Frank, Sarabdeep Singh, Helen A Harvey, Charles T Barkulis, Annika M Barnett, Olamide O Olambiwonnu, Eugenie S Heitmiller, Robert S Greenberg
BACKGROUND: Hypothermia in neonatal intensive care unit patients is associated with morbidity. Perioperative normothermia is the standard of care. AIMS: We hypothesized that a quality improvement intervention (transport protocol, transport education, ongoing monitoring) would decrease the incidence of perioperative hypothermia. Secondarily, we hypothesized that patients undergoing surgery at a postmenstrual age of <37 weeks or at a weight of <1.5 kg would be at higher risk for perioperative hypothermia...
December 5, 2016: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/27917359/protective-roles-of-intra-arterial-mild-hypothermia-and-arterial-thrombolysis-in-acute-cerebral-infarction
#5
Xiaoxiang Peng, Yue Wan, Wenjun Liu, Bitang Dan, Li Lin, Zhouping Tang
OBJECTIVE: Herein, we evaluated the efficacy and safety of intra-arterial mild hypothermia in combination with arterial thrombolysis to treat acute cerebral infarction due to middle cerebral artery occlusion. METHODS: A total of 26 patients with acute middle cerebral artery occlusion were divided into a normothermia group (n = 15) and a mild hypothermia group (n = 11). The infarct volumes at 24 h and 7 days after the operation were compared between the normothermia group and the mild hypothermia group...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27916764/serotonergic-system-does-not-contribute-to-the-hypothermic-action-of-acetaminophen
#6
Akihiro Fukushima, Wakana Sekiguchi, Kizuku Mamada, Yumi Tohma, Hideki Ono
Acetaminophen (AcAP), a widely-used antipyretic and analgesic drug, has been considered to exert its effects via central mechanisms, and many studies have demonstrated that the analgesic action of AcAP involves activation of the serotonergic system. Although the serotonergic system also plays an important role in thermoregulation, the contribution of serotonergic activity to the hypothermic effect of AcAP has remained unclear. In the present study, we examined whether the serotonergic system is involved in AcAP-induced hypothermia...
December 3, 2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27916686/altered-cytokine-profile-pain-sensitivity-and-stress-responsivity-in-mice-with-co-disruption-of-the-developmental-genes-neuregulin-1%C3%A3-disc1
#7
Lieve Desbonnet, Rachel Cox, Orna Tighe, Donna Lai, Richard P Harvey, John L Waddington, Colm M P O'Tuathaigh
The complex genetic origins of many human disorders suggest that epistatic (gene×gene) interactions may contribute to a significant proportion of their heritability estimates and phenotypic heterogeneity. Simultaneous disruption of the developmental genes and schizophrenia risk factors Neuregulin-1 (NRG1) and Disrupted-in-schizophrenia 1 (DISC1) in mice has been shown to produce disease-relevant and domain-specific phenotypic profiles different from that observed following disruption of either gene alone. In the current study, anxiety and stress responsivity phenotypes in male and female mutant mice with simultaneous disruption of DISC1 and NRG1 were examined...
December 1, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27914963/hypothermia-in-mouse-is-caused-by-adenosine-a1-and-a3-receptor-agonists-and-amp-via-three-distinct-mechanisms
#8
Jesse Lea Carlin, Shalini Jain, Elizabeth Gizewski, Tina C Wan, Dilip K Tosh, Cuiying Xiao, John A Auchampach, Kenneth A Jacobson, Oksana Gavrilova, Marc L Reitman
Small mammals have the ability to enter torpor, a hypothermic, hypometabolic state, allowing impressive energy conservation. Administration of adenosine or adenosine 5'-monophosphate (AMP) can trigger a hypothermic, torpor-like state. We investigated the mechanisms for hypothermia using telemetric monitoring of body temperature in wild type and receptor knock out (Adora1(-/-)-/-, Adora3(-/-)) mice. Confirming prior data, stimulation of the A3 adenosine receptor (AR) induced hypothermia via peripheral mast cell degranulation, histamine release, and activation of central histamine H1 receptors...
November 30, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27913267/a-comparison-between-intravascular-and-traditional-cooling-for-inducing-and-maintaining-temperature-control-in-patients-following-cardiac-arrest-traditional-or-modern-therapeutic-hypothermia-after-cardiac-arrest
#9
Jeremy Rosman, Maxime Hentzien, Moustapha Dramé, Vincent Roussel, Bernard Just, Damien Jolly, Philippe Mateu
: Therapeutic temperature control has been widely used during the last decade to improve clinical outcomes. We conducted this retrospective observational study to compare traditional cooling with endovascular cooling in post-cardiac arrest comatose survivors and to compare results with current guidelines. PATIENTS AND METHODS: All patients admitted to our ICU for cardiac arrest and for whom temperature control was performed were included. Traditional cooling included cold infusions, ice packs and cooling blankets...
November 29, 2016: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/27912037/avalanche-accidents-causing-fatalities-are-they-any-different-in-the-summer
#10
Mathieu Pasquier, Olivier Hugli, Alexandre Kottmann, Frank Techel
: Pasquier, Mathieu, Olivier Hugli, Alexandre Kottmann, and Frank Techel. Avalanche accidents causing fatalities: are they any different in the summer? High Alt Med Biol. 16:000-000, 2016. AIMS: This retrospective study investigated the epidemiology of summer avalanche accidents that occurred in Switzerland and caused at least one fatality between 1984 and 2014. Summer avalanche accidents were defined as those that occurred between June 1st and October 31st. RESULTS: Summer avalanches caused 21 (4%) of the 482 avalanches with at least one fatality occurring during the study period, and 40 (6%) of the 655 fatalities...
December 2, 2016: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/27909278/-surgical-treatment-of-right-atrial-malignant-tumor-thrombus-under-deep-hypothermia-with-intermittent-circulatory-arrest-report-of-two-cases
#11
Akira Fujita, Toshiro Kobayashi, Hideharu Hironaka, Mitsutaka Jinbou, Naomasa Uesugi, Satoshi Saito, Tsuyoshi Takahashi, Hidenori Gohra
Right atrial tumor thrombus is rare in patients with visceral malignant tumors and can cause right heart failure or sudden death. We present 2 cases of right atrial tumor thrombus treated under deep hypothermic intermittent circulatory arrest (DHICA). A 45-year-old man with right heart failure was diagnosed with right renal cancer extending to the right atrium. Computed tomography revealed no metastasis. He underwent right nephrectomy and tumor thrombus resection under DHICA. He was discharged on postoperative day 11 in good clinical course...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27908944/use-of-neuromuscular-blockers-during-therapeutic-hypothermia-after-cardiac-arrest-a-nursing-protocol
#12
Coraline Boulila, Samia Ben Abdallah, Aude Marincamp, Vincent Coic, Romuald Lauverjat, Nicole Ericher, Wulfran Bougouin, Jean-Paul Mira, Alain Cariou, Guillaume Geri
BACKGROUND: Neuromuscular blockers used to prevent shivering during therapeutic hypothermia in comatose patients after out-of-hospital cardiac arrest are associated with adverse events. OBJECTIVE: To assess the influence of a nurse-implemented protocol on use of neuromuscular blockers in patients treated with 24-hour therapeutic hypothermia after out-of-hospital cardiac arrest. METHODS: A before and after study was done in a 24-bed cardiac arrest center...
December 2016: Critical Care Nurse
https://www.readbyqxmd.com/read/27907969/neuroprotection-in-critical-care-neurology
#13
Menno R Germans, Hieronymus D Boogaarts, R Loch Macdonald
Ischemic stroke, intracerebral hemorrhage, subarachnoid hemorrhage, and traumatic brain injury-all have in common early brain injury due to brain tissue destruction, reduced cerebral blood flow and oxygen delivery, and overall substantial morbidity and mortality. The pathophysiology of brain tissue damage likely includes common cellular mechanisms. Neuroprotection has seldom, if ever, been shown to reduce early brain injury. Secondary brain injury develops after these conditions due to macroscopic events such as increased intracranial pressure and reduced cerebral blood flow, as well as cellular processes including vascular damage, inflammation, and apoptotic/necrotic cell death...
December 2016: Seminars in Neurology
https://www.readbyqxmd.com/read/27906641/time-to-cooling-is-associated-with-resuscitation-outcomes
#14
Robert B Schock, Andreas Janata, W Frank Peacock, Nathan S Deal, Sarathi Kalra, Fritz Sterz
Our purpose was to analyze evidence related to timing of cooling from studies of targeted temperature management (TTM) after return of spontaneous circulation (ROSC) after cardiac arrest and to recommend directions for future therapy optimization. We conducted a preliminary review of studies of both animals and patients treated with post-ROSC TTM and hypothesized that a more rapid cooling strategy in the absence of volume-adding cold infusions would provide improved outcomes in comparison with slower cooling...
December 2016: Therapeutic Hypothermia and Temperature Management
https://www.readbyqxmd.com/read/27906602/meta-analysis-of-pre-clinical-trials-of-therapeutic-hypothermia-for-intracerebral-hemorrhage
#15
Kara R Melmed, Patrick D Lyden
Therapeutic hypothermia (TH) is a potent neuroprotectant for experimental ischemic stroke, but studies of TH for intracerebral hemorrhage (ICH) are emerging. We systematically reviewed the experimental literature to assess TH efficacy for ICH. We found 18 suitable papers; quality scores were moderately good. Compared with normothermia, TH reduced measures of edema (mean effect size (95% CI) -1.6873 (-2.3640, -1.0106), p < 0.0001) or blood-brain barrier leakage (p < 0.0001) and improved behavioral outcomes (p < 0...
December 1, 2016: Therapeutic Hypothermia and Temperature Management
https://www.readbyqxmd.com/read/27906545/temperature-dependent-inotropic-and-lusitropic-indices-based-on-half-logistic-time-constants-for-four-segmental-phases-in-isovolumic-left-ventricular-pressure-time-curve-in-excised-cross-circulated-canine-heart
#16
Ju Mizuno, Satoshi Mohri, Takeshi Yokoyama, Mikiya Otsuji, Hideko Arita, Kazuo Hanaoka
Varying temperature affects cardiac systolic and diastolic function and the left ventricular (LV) pressure-time curve (PTC) waveform that includes information about LV inotropism and lusitropism. Our proposed half-logistic (h-L) time constants obtained by fitting using h-L functions for four segmental phases (Phases I-IV) in the isovolumic LV PTC are more useful indices for estimating LV inotropism and lusitropism during contraction and relaxation periods than the mono-exponential (m-E) time constants at normal temperature...
September 5, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/27903671/sports-related-lung-injury-during-breath-hold-diving
#17
Tanja Mijacika, Zeljko Dujic
The number of people practising recreational breath-hold diving is constantly growing, thereby increasing the need for knowledge of the acute and chronic effects such a sport could have on the health of participants. Breath-hold diving is potentially dangerous, mainly because of associated extreme environmental factors such as increased hydrostatic pressure, hypoxia, hypercapnia, hypothermia and strenuous exercise.In this article we focus on the effects of breath-hold diving on pulmonary function. Respiratory symptoms have been reported in almost 25% of breath-hold divers after repetitive diving sessions...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/27903642/behavioral-characterization-of-kappa-opioid-receptor-agonist-spiradoline-and-cannabinoid-receptor-agonist-cp55940-mixtures-in-rats
#18
Vanessa Minervini, Sujata S Dahal, Charles France
Pain is a significant clinical problem and there is a need for more effective treatments with reduced adverse effects that currently limit the use of mu opioid receptor agonists. Synthetic kappa opioid receptor agonists have no abuse liability and well-documented antinociceptive effects; however, adverse effects (diuresis, dysphoria) preclude their use in the clinic. Combining kappa opioids with non-opioid drugs (cannabinoid receptor agonists) allows for smaller doses of each drug to produce antinociception...
November 30, 2016: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/27903207/direct-cerebral-perfusion-and-cooling-in-experimental-cardiac-arrest
#19
Rinaldo Bellomo, Bruno Marino, Peter Angelopoulos, Scott Carson, Glenn Eastwood, Junko Kosaka, Naoya Iguchi, Andrew Hilton, Clive May
BACKGROUND: Cerebral protection is a key priority during cardiac arrest (CA). However, current approaches are suboptimal. OBJECTIVE: To test whether direct perfusion and cooling of the anterior cerebral circulation by means of cerebral vessel cannulation and extracorporeal membrane oxygenation (ECMO) increases cerebral oxygenation and induces cerebral hypothermia during CA. METHODS: We performed proof-of-concept animal experiments in sheep...
December 2016: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/27902983/perinatal-asphyxia-and-erythropoietin-and-vegf-serial-serum-and-cerebrospinal-fluid-responses
#20
Deirdre U Sweetman, Chike Onwuneme, William R Watson, John F A Murphy, Eleanor J Molloy
BACKGROUND: Infants with neonatal encephalopathy (NE) of hypoxic-ischaemic origin are at risk of oxidative and ischaemia-reperfusion injury, which may induce abnormal inflammatory responses involving excessive cytokine production and release in serum and cerebrospinal fluid (CSF). Systemic inflammation is found in infants with NE, and we therefore were interested in cytokines associated with hypoxia, including vascular endothelial growth factor (VEGF) and erythropoietin (Epo). OBJECTIVE: To investigate the relationship between Epo, VEGF levels, brain injury and outcome in a group of term infants exposed to perinatal asphyxia (PA) compared to controls...
December 1, 2016: Neonatology
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