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Cerebral oximetry

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https://www.readbyqxmd.com/read/28940368/cerebral-oximetry-and-postoperative-delirium-after-cardiac-surgery-a-randomised-controlled-trial
#1
L Lei, R Katznelson, L Fedorko, J Carroll, H Poonawala, M Machina, R Styra, V Rao, G Djaiani
Postoperative delirium is associated with increased morbidity and mortality. We hypothesised that restoration of regional cerebral oxygen desaturation would reduce the incidence of postoperative delirium in elderly patients after cardiac surgery. After institutional ethics review board approval and informed consent, a double-blinded, prospective, randomised, controlled trial was conducted in patients ≥ 60 years of age undergoing cardiac surgery with cardiopulmonary bypass. In the intervention group, an algorithm was commenced if regional cerebral oxygen saturation decreased below 75% of baseline value for 1 min or longer...
September 22, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28940180/cerebral-oximetry-another-blow-to-non-invasive-monitoring
#2
EDITORIAL
G Kunst, Z Milan
No abstract text is available yet for this article.
September 22, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28923611/cerebral-oximetry-as-an-auxiliary-diagnostic-tool-in-the-diagnosis-of-brain-death
#3
O Tatli, O Bekar, M Imamoglu, O Gonenc Cekic, A Aygun, U Eryigit, Y Karaca, A Sahin, S Turkmen, S Turedi
AIM: To investigate the efficacy of cerebral oximetry (CO) as an auxiliary diagnostic tool in brain death (BD). MATERIALS AND METHODS: This observational case-control study was performed on patients with suspected BD. Patients with diagnosis of BD confirmed by the brain death committee were enrolled as the BD group and other patients as the non-BD group. CO monitoring was performed at least 6 h, and cerebral tissue oxygen saturation (ScO2) parameters were compared...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28887152/cerebral-oximetry-leading-up-to-cardiac-arrest-a-marker-of-the-impact-of-mean-arterial-pressure-on-the-brain-but-not-time-of-death
#4
EDITORIAL
Sam Parnia
No abstract text is available yet for this article.
September 5, 2017: Resuscitation
https://www.readbyqxmd.com/read/28882917/effects-of-cerebral-near-infrared-spectroscopy-on-the-outcome-of-patients-undergoing-cardiac-surgery-a-systematic-review-of-randomised-trials
#5
Giuseppe Filiberto Serraino, Gavin J Murphy
OBJECTIVES: Goal-directed optimisation of cerebral oxygenation using near-infrared spectroscopy (NIRS) during cardiopulmonary bypass is widely used. We tested the hypotheses that the use of NIRS cerebral oximetry results in reductions in cerebral injury (neurocognitive function, serum biomarkers), injury to other organs including the heart and brain, transfusion rates, mortality and resource use. DESIGN: Systematic review and meta-analysis. SETTING: Tertiary cardiac surgery centres in North America, Europe and Asia...
September 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28880899/effects-of-sedation-on-subjective-perception-of-pain-intensity-and-autonomic-nervous-responses-to-pain-a-preliminary-study
#6
Hongling Kang, Aya Nakae, Hiroshi Ito, Piyasak Vitayaburananont, Takehiro Minamoto, Takashi Ikeda, Mariko Osaka, Takashi Mashimo, Yuji Fujino, Satoshi Hagihira
Rather than relying solely on subjective pain evaluation using means such as the visual analogue scale (VAS), in clinical situations it is possible to observe evoked responses of the autonomic nervous system (ANS) as objective indicators. Few studies, however, have reported these relationships under finely controlled sedation. 16 healthy male participants were administrated in intravenous sedation with either propofol or midazolam randomly. We initially determined, using pharmacokinetic simulation, the effect-site concentration (Ce) of anaesthetic at loss of response to verbal command and eyelash reflex (Ce-LOR)...
2017: PloS One
https://www.readbyqxmd.com/read/28872355/the-role-of-stump-pressure-and-cerebral-oximetry-in-predicting-ischaemic-brain-damage-during-carotid-endarterectomy
#7
Kuzhuget Rossi, Starodubtsev Vladimir, Ignatenko Pavel, Starodubtseva Alexandra, Voroshilina Olga, Ruzankin Pavel, Karpenko Andrey
Objective is to compare the predictive value of stump pressure (SP) and cerebral oximetry (rSO2) levels in the evaluation of ischaemic injury of the cerebrum during clamping of the carotid artery (CCA) without temporary shunt (TS). Methods We included 84 patients with an asymptomatic stenosis (>70%) of the internal carotid artery (ICA) who underwent carotid endarterectomy (CEA) under GA. Cerebral ischaemic tolerance (CIT) was determined on the basis of SP, rSO2 and ∆rSO2 (↓rSO2 from baseline) during CCA...
September 5, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28839003/acute-hypoxia-in-a-simulated-high-altitude-airdrop-scenario-due-to-oxygen-system-failure
#8
William Ottestad, Tor Are Hansen, Gaurav N Pradhan, Jan Stepanek, Lars Øivind Høiseth, Jan Ivar Kåsin
High Altitude High Opening (HAHO) is a military operational procedure in which parachute jumps are performed at high altitude requiring supplemental oxygen, putting personnel at risk of acute hypoxia in the event of oxygen equipment failure. This study was initiated by the Norwegian Army in order to evaluate potential outcomes during failure of oxygen supply, and to explore physiology during acute severe hypobaric hypoxia. A simulated HAHO without supplemental oxygen was carried out in a hypobaric chamber with decompression to 30 000 ft (9144 m) and then recompression to ground level with a descent rate of 1000 ft/min (305 m/min)...
August 24, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28829010/combined-stump-pressure-and-oximetry-for-shunt-use-during-carotid-endarterectomy
#9
J Max Findlay, Rohit Kesarwani, Michael Jacka, B Elaine Marchak
BACKGROUND: Cross-clamp ischemia during carotid endarterectomy can be prevented with carotid bypass shunts in vulnerable patients identified by cerebral monitoring for ischemia. We compared transcranial cerebral oximetry (TCO) with carotid stump pressure measurements for selective shunt use. METHODS: We prospectively collected data on 300 consecutive patients operated on under general anesthesia between 2009 and 2016. Shunts were inserted for a 10% or greater drop in cerebral saturations and/or a mean stump pressure less than 40 mmHg...
August 22, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28821337/intraoperative-cerebral-perfusion-disturbances-during-transcatheter-aortic-valve-replacement
#10
Jonathon P Fanning, Darren L Walters, Allan J Wesley, Chris Anstey, Samuel Huth, Judith Bellapart, Caroline Collard, Ivan L Rapchuk, Sarvesh Natani, Michael Savage, John F Fraser
BACKGROUND: Transcatheter aortic valve replacement entails profound and unavoidable hemodynamic perturbations that may contribute to the neurological injury associated with the procedure. METHODS: Thirty-one patients were monitored with cerebral oximetry as a surrogate marker of perfusion while undergoing transcatheter aortic valve replacement via a transfemoral approach under general anesthesia to detect intraoperative hypoperfusion insult. Serial neurologic, cognitive, and cerebral magnetic resonance imaging assessments were administered to objectively quantify perioperative neurologic injury and ascertain any association with significant cerebral oximetry disturbances...
August 16, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28800979/advancing-cerebral-oximetry-research-one-small-step-at-a-time
#11
EDITORIAL
Hilary P Grocott
No abstract text is available yet for this article.
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28718260/cerebral-oximetry-use-for-cardiac-surgery
#12
Syed Shahmeer Raza, Farhan Ullah, Chandni, Edward Bruce Savage
BACKGROUND: Studies have shown maintaining good cerebral perfusion during Cardiac Surgeries is very important in terms of patient outcomes and reducing the hospital stay, which may have its financial and clinical implications. The aim of this review study was to determine the effectiveness of Cerebral Oximetry (Transcranial Near-Infrared Spectroscopy-NIRS to monitor cerebral oxygenation) for Cardiac Surgery and to propose a possible concluding remark about its potential applications, overall clinical value and whether to keep using it or not...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28711570/anesthetic-management-of-reversible-cerebral-vasoconstriction-syndrome-a-case-report
#13
Hiroshi Hoshijima, Naoki Itoh, Yoshinori Iwase, Hiroshi Nagasaka
Reversible cerebral vasoconstriction syndrome (RCVS) is a group of disorders characterized by prolonged reversible cerebral vasoconstriction, associated with acute-onset, severe, episodic "thunderclap" headaches with or without other neurologic clinical features. We describe the first reported case, to our knowledge, of a patient with RCVS who was managed under general anesthesia in the field of oral and maxillofacial surgery. A 67-year-old woman with a diagnosis of RCVS made 2 months earlier was scheduled to undergo surgical extraction of the mandibular right third molar...
June 14, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28664392/validation-of-near-infrared-spectroscopy-for-monitoring-cerebral-autoregulation-in-comatose-patients
#14
Lucia Rivera-Lara, Romergryko Geocadin, Andres Zorrilla-Vaca, Ryan Healy, Batya R Radzik, Caitlin Palmisano, Marek Mirski, Wendy C Ziai, Charles Hogue
BACKGROUND: Transcranial Doppler (TCD) noninvasively measures cerebral blood flow (CBF) velocity and is a well-studied method to monitor cerebral autoregulation (CA). Near-infrared spectroscopy (NIRS) has emerged as a promising noninvasive method to determine CA continuously by using regional cerebral oxygen saturation (rSO2) as a surrogate for CBF. Little is known about its accuracy to determine CA in patients with intracranial lesions. The purpose of this study was to assess the accuracy of rSO2-based CA monitoring with TCD methods in comatose patients with acute neurological injury...
June 29, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28656097/a-comparative-study-of-the-effect-of-nasal-intermittent-positive-pressure-ventilation-and-nasal-continuous-positive-airway-pressure-on-the-regional-brain-tissue-oximetry-in-premature-newborns-weighing-1500-g
#15
Alireza Sadeghnia, Marzieh Zamani Foroshani, Zohreh Badiei
BACKGROUND: Near-infrared spectroscopy (NIRS) provides the capability of monitoring oxygenation levels in cerebral microscopic vessels, enabling the operator to observe the spontaneous changes in the levels of hemoglobin concentration in tissue and interpret the resulting fluctuations. The current study tried to investigate whether brain's autoregulatory mechanisms in premature newborns have the potential to prevent the adverse effects caused by asynchronous changes of pressure in the rib cage...
2017: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28653463/does-hypothermia-impair-cerebrovascular-autoregulation-in-neonates-during-cardiopulmonary-bypass
#16
Brendan Smith, Eric Vu, Kathleen Kibler, Craig Rusin, Ronald B Easley, Dean Andropoulos, Jeffrey Heinle, Marek Czosnyka, Daniel Licht, Jennifer Lynch, Ken Brady
BACKGROUND: Autoregulation monitoring has been proposed as a means to identify optimal arterial blood pressure goals during cardiopulmonary bypass, but it has been observed that cerebral blood flow is pressure passive during hypothermic bypass. When neonates cooled during cardiopulmonary bypass are managed with vasodilators and controlled hypotension, it is not clear whether hypothermia or hypotension were the cause of impaired autoregulation. AIM: We sought to measure the effect of both arterial blood pressure and hypothermia on autoregulation in a cohort of infants cooled for bypass, hypothesizing a collinear relationship between hypothermia, hypotension, and dysautoregulation...
September 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28651978/changes-in-cerebral-oxygenation-in-preterm-infants-with-progressive-posthemorrhagic-ventricular-dilatation
#17
Michael Kochan, Jacob McPadden, William T Bass, Tushar Shah, Wendy T Brown, Gary W Tye, Turaj Vazifedan
BACKGROUND: Optimal timing of intervention in neonatal progressive posthemorrhagic hydrocephalus is often a difficult decision. Unchecked hydrocephalus can lead to irreversible brain injury through impaired perfusion, while placement of a shunt is not without long-term morbidity. The purpose of this study was to assess the use of near-infrared spectroscopy to measure changes in regional cerebral oxygen saturation as an indicator of cerebral perfusion in infants with progressive posthemorrhagic ventricular dilatation...
May 25, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28599970/cerebral-near-infrared-spectroscopy-insensitively-detects-low-cerebral-venous-oxygen-saturations-after-stage-1-palliation
#18
Erin Rescoe, Xiaoqi Tang, Dorothy Alison Perry, Lynn A Sleeper, James A DiNardo, Barry D Kussman, John N Kheir
BACKGROUND: Measurement of cerebral venous oxyhemoglobin saturation (ScvO2) is considered a gold standard in assessing the adequacy of tissue oxygen delivery (DO2) after the stage 1 palliation (S1P), with SvO2 <30% often representing severely compromised DO2. Regional oxygenation index (rSO2) based on near-infrared resonance spectroscopy (NIRS) frequently is used to screen for compromised DO2, although its sensitivity to detect severe abnormalities in SvO2 is uncertain. METHODS: ScvO2 was measured by co-oximetry from the internal jugular vein as clinically indicated in 73 neonates after S1P...
September 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28585238/three-dimensional-mapping-of-brain-venous-oxygenation-using-r2-oximetry
#19
Deng Mao, Yang Li, Peiying Liu, Shin-Lei Peng, Jay J Pillai, Hanzhang Lu
PURPOSE: Cerebral venous oxygenation (Yv ) is an important biomarker for brain diseases. This study aims to develop an R2*-based MR oximetry that can measure cerebral Yv in 3D. METHODS: This technique separates blood signal from tissue by velocity-encoding phase contrast and measures the R2* of pure blood by multi-gradient-echo acquisition. The blood R2* was converted to Yv using an R2*-versus-oxygenation (Y) calibration curve, which was obtained by in vitro bovine blood experiments...
June 6, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28560835/a-comparison-of-pulse-oximetry-and-cerebral-oxygenation-in-children-with-severe-sleep-apnea-hypopnea-syndrome-a-pilot-study
#20
Jorge Olmo Arroyo, Sonia Khirani, Alessandro Amaddeo, Lucie Griffon, Livio De Sanctis, Philippe Pouard, Brigitte Fauroux
Near infrared spectroscopy (NIRS) has been used to assess the impact of obstructive sleep apnea-hypopnea syndrome (OSAHS) on cerebral oxygenation. However, the relationship between the variations in the cerebral tissue oxygen saturation (ΔTOI) and pulse oximetry (ΔSpO2 ) has not been assessed in children with OSAHS. Consecutive clinically stable children with severe OSAHS [apnea-hypopnea index (AHI) >15 events h(-1) ] diagnosed during a night-time polygraphy with simultaneous recording of cerebral oxygenation with NIRS (NIRO-200NX, Hamamatsu Photonics KK) were included between September 2015 and June 2016...
May 31, 2017: Journal of Sleep Research
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