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https://www.readbyqxmd.com/read/28547651/photoplethysmography-for-blood-volumes-and-oxygenation-changes-during-intermittent-vascular-occlusions
#1
T Y Abay, P A Kyriacou
Photoplethysmography (PPG) is an optical technique that measures blood volume variations. The main application of dual-wavelength PPG is pulse oximetry, in which the arterial oxygen saturation (SpO[Formula: see text]) is calculated noninvasively. However, the PPG waveform contains other significant physiological information that can be used in conjunction to SpO[Formula: see text] for the assessment of oxygenation and blood volumes changes. This paper investigates the use of near infrared spectroscopy (NIRS) processing techniques for extracting relative concentration changes of oxygenated ([Formula: see text]HbO[Formula: see text]), reduced ([Formula: see text]HHb) and total haemoglobin ([Formula: see text]tHb) from dual-wavelength PPG signals during intermittent pressure-increasing vascular occlusions...
May 25, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28542481/effect-of-hyperbaric-oxygen-on-bdnf-release-and-neuroprotection-investigations-with-human-mesenchymal-stem-cells-and-genetically-modified-nih3t3-fibroblasts-as-putative-cell-therapeutics
#2
Jennifer Schulze, Odett Kaiser, Gerrit Paasche, Hans Lamm, Andreas Pich, Andrea Hoffmann, Thomas Lenarz, Athanasia Warnecke
Hyperbaric oxygen therapy (HBOT) is a noninvasive widely applied treatment that increases the oxygen pressure in tissues. In cochlear implant (CI) research, intracochlear application of neurotrophic factors (NTFs) is able to improve survival of spiral ganglion neurons (SGN) after deafness. Cell-based delivery of NTFs such as brain-derived neurotrophic factor (BDNF) may be realized by cell-coating of the surface of the CI electrode. Human mesenchymal stem cells (MSC) secrete a variety of different neurotrophic factors and may be used for the development of a biohybrid electrode in order to release endogenously-derived neuroprotective factors for the protection of residual SGN and for a guided outgrowth of dendrites in the direction of the CI electrode...
2017: PloS One
https://www.readbyqxmd.com/read/28538801/effects-of-hyperbaric-oxygen-and-nerve-growth-factor-on-the-long-term-neural-behavior-of-neonatal-rats-with-hypoxic-ischemic-brain-damage
#3
Lixia Wei, Qing Ren, Yongjun Zhang, Jiwen Wang
Purpose: To evaluate the effects of HBO (Hyperbaric oxygen) and NGF (Nerve growth factor) on the long-term neural behavior of neonatal rats with HIBD (Neonatal hypoxic ischemic brain damage). Methods: The HIBD model was produced by ligating the right common carotid artery of 7 days old SD (Sprague-Dawley) rats followed by 8% O2 + 92% N2 for 2h. Totally 40 rats were randomly divided into 5 groups including sham-operated group, HIBD control group, HBO treated group, NGF treated group and NGF + HBO treated group...
April 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28502690/the-clinical-effect-of-postoperative-hyperbaric-oxygen-therapy-on-idiopathic-normal-pressure-hydrocephalus-a-retrospective-and-comparative-analysis-of-61-patients-with-ventriculoperitoneal-shunt
#4
Lin Yang, Xingdong Wang, Yuping Li, Lang Chen, Zhengcun Yan, Lei She, Jun Dong
PURPOSE: The aim of the study was to examine the clinical effect of postoperative hyperbaric oxygen (HBO) therapy on symptoms and signs in the ventriculoperitoneal (VP) shunt insertion treatment of idiopathic normal pressure hydrocephalus (iNPH). MATERIALS AND METHODS: We conducted a retrospective analysis of 61 patients treated at our institution for iNPH since 2007. Patients were stratified into 2 groups according to undergoing pure VP shunt with gravitational valves (Group 1) or combined with postoperative HBO therapy (Group 2)...
May 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28495827/hyperbaric-oxygen-reduces-infarction-volume-and-hemorrhagic-transformation-through-atp-nad-sirt1-pathway-in-hyperglycemic-middle-cerebral-artery-occlusion-rats
#5
Qin Hu, Anatol Manaenko, Hetao Bian, Zongduo Guo, Jun-Long Huang, Zhen-Ni Guo, Peng Yang, Jiping Tang, John H Zhang
BACKGROUND AND PURPOSE: Energy depletion is a critical factor leading to cell death and brain dysfunction after ischemic stroke. In this study, we investigated whether energy depletion is involved in hyperglycemia-induced hemorrhagic transformation after ischemic stroke and determined the pathway underlying the beneficial effects of hyperbaric oxygen (HBO). METHODS: After 2-hour middle cerebral artery occlusion, hyperglycemia was induced by injecting 50% dextrose (6 mL/kg) intraperitoneally at the onset of reperfusion...
May 11, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28473763/the-optimal-speed-for-cortical-activation-of-passive-wrist-movements-performed-by-a-rehabilitation-robot-a-functional-nirs-study
#6
Sung Jin Bae, Sung Ho Jang, Jeong Pyo Seo, Pyung Hun Chang
Objectives: To advance development of rehabilitation robots, the conditions to induce appropriate brain activation during rehabilitation performed by robots should be optimized, based on the concept of brain plasticity. In this study, we examined differences in cortical activation according to the speed of passive wrist movements performed by a rehabilitation robot. Methods: Twenty three normal subjects participated in this study. Passive movements of the right wrist were performed by the wrist rehabilitation robot at three different speeds: 0...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28470432/the-no-cgmp-pkg-signal-transduction-pathway-is-involved-in-the-analgesic-effect-of-early-hyperbaric-oxygen-treatment-of-neuropathic-pain
#7
Yuanyuan Ding, Peng Yao, Tao Hong, Zhenkai Han, Baisong Zhao, Weimin Chen
BACKGROUND: Hyperbaric oxygen (HBO) has the potential to relieve neuropathic pain. The purpose of this study was to determine whether the NO-cGMP-PKG signaling pathway is involved in the analgesic effects of early hyperbaric oxygen treatment of neuropathic pain in rats. METHODS: Rats were randomly grouped for establishment of chronic constriction injury (CCI) models. Intrathecal catheters were inserted and 2.5ATA HBO therapy was administered from day 1 post-surgery for 60 minutes daily, continuously for 5 days; menstruum NS, DMSO, NO synthase(NOS) nonspecific inhibitor (L-NAME), soluble guanylyl cyclase(sGC) inhibitor (ODQ) and protein kinase G(PKG) inhibitor (KT5823) were administered intrathecally 30 minutes prior to HBO therapy...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28426381/hyperbaric-oxygen-for-experimental-intracerebral-haemorrhage-systematic-review-and-stratified-meta-analysis
#8
Han-Jin Cui, Hao-Yu He, A-Li Yang, Hua-Jun Zhou, Tao Tang, Jie-Kun Luo
OBJECTIVE: Hyperbaric oxygen (HBO) is widely used in treating various neurological diseases. However, HBO for treatment of intracerebral haemorrhage (ICH) remains controversial, in either animal or clinical studies. Therefore, we conducted this systematic review and meta-analysis on studies describing the efficacy of HBO in animal models of ICH. METHODS: Studies were identified by searching mainstream databases through November 2015. The efficacy of HBO in animal models of ICH was assessed by changes in the brain water content (BWC), neurobehavioural outcome (NO) or both...
2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28413648/effects-of-hyperbaric-oxygen-treatment-on-gastric-cancer-cell-line-sgc7901
#9
Yinliang Qi, Jianfeng Ruan, Mei Wang, Yuanchang Dai, Qing Zhou, Shuyu Gui, Sumei Zhang, Yuan Wang
Hyperbaric oxygen (HBO) has been previously identified as an effective adjunct treatment option for the management of brain injury, diabetic ulcers and chronic wounds. However, the roles of HBO as an adjunctive therapy for tumors remain controversial. The present research project was performed to explore the effects of HBO treatment on proliferation, autophagy and endoplasmic reticulum stress response of the gastric cancer cell line, SGC7901. The present study demonstrated that, after subjecting SGC7901 cells to HBO treatment, the increase in cell proliferation was significant, compared with that of the control group...
April 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28410116/hyperbaric-oxygenation-for-resuscitation-and-therapy-of-elderly-patients-with-cerebral-and-cardio-respiratory-dysfunction
#10
Gennady G Rogatsky, Ilia Stambler
Hyperbaric oxygenation therapy (HBOT) has been gaining an increasing recognition as a versatile therapeutic approach. This article reviews the application of hyperbaric oxygenation as a method for resuscitation and therapy of elderly patients with cerebral and cardio-respiratory dysfunction, in acute as compared to chronic impairments. The vital role of proper dosage of HBO therapy to ensure both the efficacy and safety of the treatment is emphasized. We argue that in the acute stages of brain and cardiorespiratory impairment, the adequate hyperbaric oxygen dose is the most important condition for obtaining maximum therapeutic effect, due to the powerful anti-hypoxic capabilities of this method...
June 1, 2017: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28393184/hyperbaric-oxygen-inhibits-venous-neointimal-hyperplasia-following-arteriovenous-fistulization
#11
Zhui Li, Maoping Li, Xiangjie Li, Mao Zhang, Yu Zhao, Wei Ren, Jun Cheng, Xuehu Wang
Hypoxia following arteriovenous fistulization results in venous neointimal hyperplasia (VNH), potentially causing early arteriovenous fistula (AVF) dysfunction. In this study, we used hyperbaric oxygen (HBO) in a rabbit model of AVF to determine whether it could ameliorate early AVF failure. Chronic renal failure was induced by adenine in 96 adult rabbits randomly divided into 3 groups (n=32 in each group). The sham + HBO group underwent sham operation and received HBO. The AVF alone group underwent fistulization, but did not receive HBO...
May 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28385082/hyperbaric-oxygen-therapy-modulates-serum-opg-rankl-in-femoral-head-necrosis-patients
#12
Giuliano Vezzani, Silvia Quartesan, Pasqua Cancellara, Enrico Camporesi, Devanand Mangar, Thomas Bernasek, Prachiti Dalvi, Zhongjin Yang, Antonio Paoli, Alex Rizzato, Gerardo Bosco
Hyperbaric oxygen therapy (HBOT) has beneficial effects on avascular necrosis of femoral head (ANFH), but its mechanism of action is still unclear. We investigated if HBOT upregulates serum osteoprotegerin (OPG) and/or inhibits osteoclast activation. 23 patients with unilateral ANFH at stage I, II and III consented to the study: the patients received standard HBOT. Serum OPG levels were obtained at the beginning of HBOT (T0), after 15 sessions (T1), 30 sessions (T2), after a 30-day break (T3), and after 60 sessions (T4)...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28378582/low-affinity-zinc-sensor-showing-fluorescence-responses-with-minimal-artifacts
#13
Xinhao Yan, Jin Ju Kim, Hye Sun Jeong, Yu Kyung Moon, Yoon Kyung Cho, Soyeon Ahn, Sang Beom Jun, Hakwon Kim, Youngmin You
The study of the zinc biology requires molecular probes with proper zinc affinity. We developed a low-affinity zinc probe (HBO-ACR) based on an azacrown ether (ACR) and an 2-(2-hydroxyphenyl)benzoxazole (HBO) fluorophore. This probe design imposed positive charge in the vicinity of a zinc coordination center, which enabled fluorescence turn-on responses to high levels of zinc without being affected by the pH and the presence of other transition-metal ions. Steady-state and transient photophysical investigations suggested that such a high tolerance benefits from orchestrated actions of proton-induced nonradiative and zinc-induced radiative control...
April 5, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28374694/-dynamics-of-eeg-and-psychophysiological-indicators-of-acute-poisoning-neurotoxicants-on-the-stage-of-rehabilitation-on-the-background-of-different-methods-of-treatment
#14
I Yu Berezina, A V Badalyan, L I Sumsky, Yu S Gol'dfarb
AIM: To evaluate the dynamics of functional activity of brain structures underlying cognitive functions in patients with encephalopathy due to poisoning with neurotoxicants on the stage of rehabilitation. MATERIAL AND METHODS: Fifty-six patients were examined. The main group consisted of 40 patients treated with intravenous injections with mexidol (n=10), combination of mexidol with non-pharmacological methods - mesodiencephalic modulation (MDM) (n=10), hyperbaric oxygenation (HBO) (n=10) and the combination of MDM and HBO (n=10)...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28362819/hydrogen-gas-alleviates-oxygen-toxicity-by-reducing-hydroxyl-radical-levels-in-pc12-cells
#15
Junchao Yu, Qiuhong Yu, Yaling Liu, Ruiyun Zhang, Lianbi Xue
Hyperbaric oxygen (HBO) therapy through breathing oxygen at the pressure of above 1 atmosphere absolute (ATA) is useful for varieties of clinical conditions, especially hypoxic-ischemic diseases. Because of generation of reactive oxygen species (ROS), breathing oxygen gas at high pressures can cause oxygen toxicity in the central nervous system, leading to multiple neurological dysfunction, which limits the use of HBO therapy. Studies have shown that Hydrogen gas (H2) can diminish oxidative stress and effectively reduce active ROS associated with diseases...
2017: PloS One
https://www.readbyqxmd.com/read/28352069/efficacy-of-n-butylphthalide-and-hyperbaric-oxygen-therapy-on-cognitive-dysfunction-in-patients-with-delayed-encephalopathy-after-acute-carbon-monoxide-poisoning
#16
RANDOMIZED CONTROLLED TRIAL
Wenping Xiang, Hui Xue, Baojun Wang, Yuechun Li, Jun Zhang, Changchun Jiang, Jiangxia Pang
BACKGROUND Delayed encephalopathy after acute carbon monoxide (CO) poisoning (DEACMP) is one of the most serious complications after CO poisoning. This study was conducted to explore the efficacy of the combined application of N-Butylphthalide and hyperbaric oxygenation therapy (HBO) on cognitive dysfunction in patients with DEACMP. MATERIAL AND METHODS A total of 184 patients with DEACMP were randomly assigned to either receive HBO or N-Butylphthalide and HBO. Meanwhile, all patients received conventional treatment...
March 29, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28336821/hyperbaric-oxygen-therapy-reduces-renal-lactate-production
#17
Thomas S Nørlinger, Per Mose Nielsen, Haiyun Qi, Emmeli Mikkelsen, Kasper Hansen, Nikolaj H Schmidt, Michael Pedersen, Peter Agger, Fredrik Palm, Christoffer Laustsen
Intrarenal hypoxia is an acknowledged factor contributing to the development of diabetic nephropathy. Hyperbaric oxygen (HBO) therapy is a well-known adjuvant treatment for several medical conditions, such as decompression sickness, infections, and wound healing. The underlying metabolic response of HBO is largely unknown. In this study, we investigated the effect of HBO on the intrarenal metabolic alteration in diabetes. Hyperpolarized [1-(13)C]pyruvate MRI was performed to assess intrarenal energy metabolism in normoglycemic controls and short-term (2 weeks) streptozotocin-induced diabetic rats with and without HBO for five consecutive days...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28336339/optimal-feature-selection-from-fnirs-signals-using-genetic-algorithms-for-bci
#18
Farzan Majeed Noori, Noman Naseer, Nauman Khalid Qureshi, Hammad Nazeer, Rayyan Azam Khan
In this paper, a novel technique for determination of the optimal feature combinations and, thereby, acquisition of the maximum classification performance for a functional near-infrared spectroscopy (fNIRS)-based brain-computer interface (BCI), is proposed. After obtaining motor-imagery and rest signals from the motor cortex, filtering is applied to remove the physiological noises. Six features (signal slope, signal mean, signal variance, signal peak, signal kurtosis and signal skewness) are then extracted from the oxygenated hemoglobin (HbO)...
March 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28328661/microangiography-to-monitor-treatment-outcomes-following-severe-frostbite-injury-to-the-hands
#19
Thomas Masters, Steven Omodt, Jon Gayken, Christopher Logue, Bjorn Westgard, Stephen Hendriksen, Joseph Walter, Rachel Nygaard
Frostbite injury causes direct damage to tissues following exposure to temperatures below their freezing point causing tissue death potentially leading to serious amputations. After rewarming, a variety of treatment options have been employed to avoid amputation. This case report details the use of indocyanine green fluorescence microangiography to monitor the clinical progression of perfusion following hyperbaric oxygen therapy (HBOT) for severe frostbite injury. We present a case report of a man with deep frostbite of the bilateral hands treated with thrombolytics and HBOT...
March 15, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28325788/decompression-illness-with-hypovolemic-shock-and-neurological-failure-symptoms-after-two-risky-dives-a-case-report
#20
Sebastian Klapa, Johannes Meyne, Wataru Kähler, Frauke Tillmans, Henning Werr, Andreas Binder, Andreas Koch
Hypovolemia is known to be a predisposing factor of decompression illness (DCI) while diving. The typical clinically impressive neurological symptoms of DCI may distract from other symptoms such as an incipient hypovolemic shock. We report the case of a 61-year-old male Caucasian, who presented with an increasing central and peripheral neural failure syndrome and massive hypovolemia after two risky dives. Computed tomography (CT) scans of the chest and Magnetic resonance imaging scans of the head revealed multiple cerebral and pulmonary thromboembolisms...
March 2017: Physiological Reports
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