keyword
MENU ▼
Read by QxMD icon Read
search

Blood oxygenator

keyword
https://www.readbyqxmd.com/read/29677510/physiological-and-genetic-adaptations-to-diving-in-sea-nomads
#1
Melissa A Ilardo, Ida Moltke, Thorfinn S Korneliussen, Jade Cheng, Aaron J Stern, Fernando Racimo, Peter de Barros Damgaard, Martin Sikora, Andaine Seguin-Orlando, Simon Rasmussen, Inge C L van den Munckhof, Rob Ter Horst, Leo A B Joosten, Mihai G Netea, Suhartini Salingkat, Rasmus Nielsen, Eske Willerslev
Understanding the physiology and genetics of human hypoxia tolerance has important medical implications, but this phenomenon has thus far only been investigated in high-altitude human populations. Another system, yet to be explored, is humans who engage in breath-hold diving. The indigenous Bajau people ("Sea Nomads") of Southeast Asia live a subsistence lifestyle based on breath-hold diving and are renowned for their extraordinary breath-holding abilities. However, it is unknown whether this has a genetic basis...
April 19, 2018: Cell
https://www.readbyqxmd.com/read/29677351/retinal-oxygen-delivery-and-metabolism-in-healthy-and-sickle-cell-retinopathy-subjects
#2
Mahnaz Shahidi, Anthony E Felder, Ou Tan, Norman P Blair, David Huang
Purpose: Reduction in inner retinal oxygen delivery (DO2) can cause retinal hypoxia and impair inner retinal oxygen metabolism (MO2), leading to vision loss. The purpose of the current study was to establish measurements of DO2 and MO2 in healthy subjects and test the hypothesis that DO2 and MO2 are reduced in sickle cell retinopathy (SCR) subjects. Methods: Dual wavelength retinal oximetry and Doppler optical coherence tomography were performed in 12 healthy control and 12 SCR subjects...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677087/military-supplement-perfluorocarbon-gas-transport-an-overview-of-medical-history-with-yet-unrealized-potentials
#3
Bruce D Spiess
Perfluorocarbon (PFCs) compounds have been a hereto fore under realized pharmaceutical class of intravenous emulsions and respiratory adjuvants researched extensively since the late 1970. This review represents an introduction for a series of more detailed lectures/manuscripts that were part of a combined United States collaborative Federal agency meeting in early February, 2017 at Ft Detrick, MD, focused upon potential technologies in development to fulfill a perceived need: "When blood transfusion is not available...
April 19, 2018: Shock
https://www.readbyqxmd.com/read/29677080/corm-401-reduces-ischemia-reperfusion-injury-in-an-ex-vivo-renal-porcine-model-of-the-donation-after-cardiac-death
#4
Rabindra N Bhattacharjee, Mahms Richard-Mohamed, Qizhi Sun, Aaron Haig, Ghaleb Aboalsamh, Peter Barrett, Richard Mayer, Ibrahim Alhasan, Karen Pineda-Solis, Larry Jiang, Hajed Alharbi, Manujendra Saha, Eric Patterson, Alp Sener, Gediminas Cepinskas, Anthony M Jevnikar, Patrick P W Luke
BACKGROUND: Carbon monoxide (CO) inhalation protects organ by reducing inflammation and cell death during transplantation processes in animal model. However, using CO in clinical transplantation is difficult due to its delivery in a controlled manner. A manganese-containing CORM-401 has recently been synthesized which can efficiently deliver 3 molar equivalents of CO. We report the ability of this anti-inflammatory CORM-401 to reduce ischemia reperfusion injury associated with prolonged cold storage of renal allografts obtained from donation after cardiac death in a porcine model of transplantation...
April 19, 2018: Transplantation
https://www.readbyqxmd.com/read/29677054/effects-of-acute-aerobic-exercise-on-arterial-stiffness-and-cerebrovascular-pulsatility-in-adults-with-and-without-hypertension
#5
Wesley K Lefferts, Jacob P DeBlois, Candace N Receno, Tiago V Barreira, Tom D Brutsaert, Robert L Carhart, Kevin S Heffernan
OBJECTIVES: Stiffer central arteries, as seen in hypertension (HTN), foster transmission of pulsatile hemodynamics into fragile cerebral vessels. Aerobic exercise is recommended for adults with HTN, but its effects on arterial stiffness and pulsatility in this group are unclear. This study sought to investigate the effect of acute aerobic exercise on arterial stiffness and cerebrovascular pulsatility in 30 adults with treated HTN and 30 age, sex, and BMI-matched adults without HTN (56 ± 6 years, BMI 28...
April 19, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29676964/advanced-imaging-techniques-in-evaluation-of-colorectal-cancer
#6
Roberto García-Figueiras, Sandra Baleato-González, Anwar R Padhani, Antonio Luna-Alcalá, Ana Marhuenda, Joan C Vilanova, Iria Osorio-Vázquez, Anxo Martínez-de-Alegría, Antonio Gómez-Caamaño
Imaging techniques are clinical decision-making tools in the evaluation of patients with colorectal cancer (CRC). The aim of this article is to discuss the potential of recent advances in imaging for diagnosis, prognosis, therapy planning, and assessment of response to treatment of CRC. Recent developments and new clinical applications of conventional imaging techniques such as virtual colonoscopy, dual-energy spectral computed tomography, elastography, advanced computing techniques (including volumetric rendering techniques and machine learning), magnetic resonance (MR) imaging-based magnetization transfer, and new liver imaging techniques, which may offer additional clinical information in patients with CRC, are summarized...
April 20, 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29676667/evaluating-the-clinical-value-of-the-hypoxia-burden-index-in-patients-with-obstructive-sleep-apnea
#7
Fengwei Chen, Kun Chen, Cheng Zhang, Xue Chen, Junjun Huang, Peng Jia, Jing Ma, Jue Zhang, Jing Fang, Guangfa Wang
PURPOSE: We aimed to develop a novel index, the hypoxia burden index (HBI), that reflects the degree and duration of oxygen desaturation, and to determine whether this index is better than the apnea hypopnea-index (AHI) for evaluating obstructive sleep apnea (OSA) and cardiovascular diseases morbidities. METHODS: We retrospectively analyzed 459 adult subjects who underwent overnight polysomnography (PSG) in this study. The HBI was calculated by dividing the total desaturation area of SpO2 below 90% by the TST measured in seconds...
April 20, 2018: Postgraduate Medicine
https://www.readbyqxmd.com/read/29675862/hemodialysis-a-model-for-extreme-physiology-in-a-vulnerable-patient-population
#8
REVIEW
Jeroen P Kooman, Krassimir Katzarski, Frank M van der Sande, Karel M Leunissen, Peter Kotanko
Hemodialysis (HD) is a lifesaving treatment for patients with end-stage renal disease, which is very efficient in the correction of abnormalities of the internal environment. However, this efficiency also induces significant hemodynamic, thermal, and respiratory stressors. These have parallels with the extreme physiologic demands which are normally mainly experienced by healthy subjects under adverse environmental conditions, with the difference that they must be endured by a vulnerable patient population. Hemodynamic stress induced by ultrafiltration leads to a decline in circulating blood volume, which may result in intradialytic hypotension (IDH) and changes in tissue perfusion, which may have long-term consequences for the function of vital organs such as the brain and the heart...
April 19, 2018: Seminars in Dialysis
https://www.readbyqxmd.com/read/29675595/involvement-of-cytosolic-and-mitochondrial-iron-in-iron-overload-cardiomyopathy-an-update
#9
REVIEW
Richard Gordan, Suwakon Wongjaikam, Judith K Gwathmey, Nipon Chattipakorn, Siriporn C Chattipakorn, Lai-Hua Xie
Iron overload cardiomyopathy (IOC) is a major cause of death in patients with diseases associated with chronic anemia such as thalassemia or sickle cell disease after chronic blood transfusions. Associated with iron overload conditions, there is excess free iron that enters cardiomyocytes through both L- and T-type calcium channels thereby resulting in increased reactive oxygen species being generated via Haber-Weiss and Fenton reactions. It is thought that an increase in reactive oxygen species contributes to high morbidity and mortality rates...
April 19, 2018: Heart Failure Reviews
https://www.readbyqxmd.com/read/29675493/association-between-seminal-plasma-neopterin-and-oxidative-stress-in-male-infertility-a-case-control-study
#10
Tayebeh Ghiasvand, Mohammad Taghi Goodarzi, Gholamreza Shafiee, Alireza Zamani, Jamshid Karimi, Marzieh Ghorbani, Iraj Amiri
Background: Neopterin is a significant and sensitive marker in estimating the activity of cellular immune system. Oxidative stress plays a role in the etiology of male infertility. Increased reactive oxygen species is accompanied with increase in neopterin level. Hence neopterin may be involved in male infertility. Objective: The objective of this case-control study was to determine neopterin level in idiopathic infertile and normospermic men; furthermore, to identify its relationship with oxidative stress markers including total oxidant, malondialdehyde, sperm DNA fragmentation, and total antioxidant capacity of seminal plasma...
February 2018: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29675404/neonatal-hemodynamics-from-developmental-physiology-to-comprehensive-monitoring
#11
REVIEW
Sabine L Vrancken, Arno F van Heijst, Willem P de Boode
Maintenance of neonatal circulatory homeostasis is a real challenge, due to the complex physiology during postnatal transition and the inherent immaturity of the cardiovascular system and other relevant organs. It is known that abnormal cardiovascular function during the neonatal period is associated with increased risk of severe morbidity and mortality. Understanding the functional and structural characteristics of the neonatal circulation is, therefore, essential, as therapeutic hemodynamic interventions should be based on the assumed underlying (patho)physiology...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29675134/leptin-and-leptin-resistance-in-the-pathogenesis-of-obstructive-sleep-apnea-a-possible-link-to-oxidative-stress-and-cardiovascular-complications
#12
REVIEW
Slava Berger, Vsevolod Y Polotsky
Obesity-related sleep breathing disorders such as obstructive sleep apnea (OSA) and obesity hypoventilation syndrome (OHS) cause intermittent hypoxia (IH) during sleep, a powerful trigger of oxidative stress. Obesity also leads to dramatic increases in circulating levels of leptin, a hormone produced in adipose tissue. Leptin acts in the hypothalamus to suppress food intake and increase metabolic rate. However, obese individuals are resistant to metabolic effects of leptin. Leptin also activates the sympathetic nervous system without any evidence of resistance, possibly because these effects occur peripherally without a need to penetrate the blood-brain barrier...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29674976/neocytolysis-how-to-get-rid-of-the-extra-erythrocytes-formed-by-stress-erythropoiesis-upon-descent-from-high-altitude
#13
REVIEW
Heimo Mairbäurl
Neocytolysis is the selective destruction of those erythrocytes that had been formed during stress-erythropoiesis in hypoxia in order to increase the oxygen transport capacity of blood. Neocytolysis likely aims at decreasing this excess amount of erythrocytes and hemoglobin (Hb) when it is not required anymore and to decrease blood viscosity. Neocytolysis seems to occur upon descent from high altitude. Similar processes seem to occur in microgravity, and are also discussed to mediate the replacement of erythrocytes containing fetal hemoglobin (HbF) with those having adult hemoglobin (HbA) after birth...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29674752/protecting-the-ischaemic-penumbra-as-an-adjunct-to-thrombectomy-for-acute-stroke
#14
REVIEW
Jean-Claude Baron
After ischaemic stroke, brain damage can be curtailed by rescuing the 'ischaemic penumbra' - that is, the severely hypoperfused, at-risk but not yet infarcted tissue. Current evidence-based treatments involve restoration of blood flow so as to salvage the penumbra before it evolves into irreversibly damaged tissue, termed the 'core'. Intravenous thrombolysis (IVT) can salvage the penumbra if given within 4.5 h after stroke onset; however, the early recanalization rate is only ~30%. Direct removal of the occluding clot by mechanical thrombectomy considerably improves outcomes over IVT alone, but despite early recanalization in > 80% of cases, ~50% of patients who receive this treatment do not enjoy functional independence, usually because the core is already too large at the time of recanalization...
April 19, 2018: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/29674333/intravenous-and-intratracheal-thyrotropin-releasing-hormone-and-its-analog-taltirelin-reverse-opioid-induced-respiratory-depression-in-isoflurane-anesthetized-rats
#15
James D Boghosian, Anita Luethy, Joseph F Cotten
Thyrotropin releasing hormone (TRH) is a tripeptide hormone and a neurotransmitter widely-expressed in the CNS that regulates thyroid function and that maintains physiologic homeostasis. Following injection in rodents, TRH has multiple effects including increased blood pressure and breathing. We tested the hypothesis that TRH and its long-acting analog, taltirelin, will reverse morphine-induced respiratory depression in anesthetized rats following intravenous(IV) or intratracheal(IT) administration. TRH (1 mg/kg plus 5 mg/kg/hour IV) and talitrelin (1 mg/kg IV), when administered to rats pretreated with morphine (5 mg/kg IV), increased ventilation from 50±6 to 131±7% and 45±6 to 168±13% (percent baseline; n=4±SEM), primarily through increased breathing rates (from 76+/-9 to 260±14% and 66±8 to 318±37%)...
April 19, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29673593/augmented-neutrophil-extracellular-traps-formation-promotes-atherosclerosis-development-in-socially-defeated-apoe-mice
#16
Keita Yamamoto, Hiroyuki Yamada, Noriyuki Wakana, Masakazu Kikai, Kensuke Terada, Naotoshi Wada, Shinichiro Motoyama, Makoto Saburi, Takeshi Sugimoto, Daisuke Kami, Takehiro Ogata, Masakazu Ibi, Chihiro Yabe-Nishimura, Satoaki Matoba
Depression is an independent risk factor of cardiovascular disease (CVD); however, the causal association remains undefined. We exposed mice to repeated social defeat (RSD) to precipitate depressive-like behaviors, and investigated the effects on atherosclerosis. Eight-week-old male apoE-/- mice were exposed to RSD by housing with a larger CD-1 mouse in a shared home cage. They were subjected to vigorous physical contact daily for 10 consecutive days and fed a high-cholesterol diet (HCD) for 6 weeks. The social interaction ratio and immobility time showed dramatic social avoidance before and after HCD feeding...
April 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29673580/the-long-term-effects-of-cocaine-use-on-cognitive-functioning-a-systematic-critical-review
#17
REVIEW
Kirsten M Frazer, Qwynten Richards, Diana R Keith
BACKGROUND: The predominant view of chronic cocaine use maintains that it causes a broad range of cognitive deficits. However, concerns about the possibly deleterious impact of cocaine on cognitive functioning have yet to be thoroughly vetted. This review addresses the impact of cocaine use on such cognitive domains as executive function, memory, language, and psychomotor speed. Additionally, relevant neuroimaging data is considered to understand the neural basis underlying cocaine-related effects on cognitive functioning...
April 16, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29673243/the-effect-of-additional-carbohydrate-supplements-for-7-days-after-prolonged-interval-exercise-on-exercise-performance-and-energy-metabolism-during-submaximal-exercise-in-team-sports-athletes
#18
Hun-Young Park, Jisu Kim, Miyoung Park, Nana Chung, Kiwon Lim
PURPOSE: The purpose of our study was to determine the effectiveness of carbohydrate loading by additional carbohydrate supplements for 7 days after prolonged interval exercise on exercise performance and energy metabolism during submaximal exercise in team-sports athletes. METHODS: Twenty male team-sports athletes (14 soccer and 6 rugby players) volunteered to participate in the study and were equally divided into the experimental group (EXP, n=10) performing additional carbohydrate supplementation for 7 days after prolonged interval exercise until blood glucose level reaches 50 mg/dL or less and the control group (CON, n=10)...
March 30, 2018: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29672351/femoral-artery-blood-flow-and-microcirculatory-perfusion-during-acute-low-level-functional-electrical-stimulation-in-spinal-cord-injury
#19
Thomas J Barton, David A Low, Thomas W J Janssen, Maurits Sloots, Christof A J Smit, Dick H J Thijssen
OBJECTIVE: Functional electrical stimulation (FES) may help to reduce the risk of developing macro- and microvascular complications in people with SCI. Low-intensity FES has significant clinical potential since this can be applied continuously throughout the day. This study examines the acute effects of low intensity FES using wearable clothing garment on vascular blood flow and oxygen consumption in people with SCI. DESIGN: Cross-sectional observation study METHODS: Eight participants with a motor complete SCI received 4x3 minutes of unilateral FES to the gluteal and hamstring muscles...
April 19, 2018: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29671905/oxygen-uptake-and-net-flux-of-metabolites-by-splanchnic-tissues-of-sheep-in-response-to-short-term-mesenteric-infusion-of-nitrogenous-compounds
#20
S Stefanello, M P Mezzomo, D Zeni, R C Ebling, A V Soares, G V Kozloski
This study was conducted in an attempt to quantify the impact of N load on splanchnic tissues metabolism of sheep. The trial was conducted with four male sheep (45 ± 2.5 kg body weight (BW)) surgically implanted with chronic indwelling catheters into the portal, hepatic and mesenteric veins. Blood flow and metabolic flux through portal-drained viscera (PDV), liver and total splanchnic tissues (ST) were measured daily following a 4 × 4 Latin Square experimental design, where sheep were continually infused into the mesenteric vein with a physiological saline (0...
April 19, 2018: Journal of Animal Physiology and Animal Nutrition
keyword
keyword
48592
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"