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NIRS anesthesia

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https://www.readbyqxmd.com/read/30100768/changes-in-cerebral-oxygenation-based-on-intraoperative-ventilation-strategy
#1
Elisabeth Dewhirst, Hina Walia, Walter P Samora, Allan C Beebe, Jan E Klamar, Joseph D Tobias
Introduction: Cerebral oxygenation can be monitored clinically by cerebral oximetry (regional oxygen saturation, rSO2 ) using near-infrared spectroscopy (NIRS). Changes in rSO2 have been shown to precede changes in pulse oximetry, providing an early detection of clinical deterioration. Cerebral oximetry values may be affected by various factors, including changes in ventilation. The aim of this study was to evaluate the changes in rSO2 during intraoperative changes in mechanical ventilation...
2018: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/29932375/pace-of-movement-the-role-of-single-neurons-in-the-subthalamic-nucleus
#2
Ariel Tankus, Anat Mirelman, Nir Giladi, Itzhak Fried, Jeffrey M Hausdorff
OBJECTIVE The ability to modulate the pace of movement is a critical factor in the smooth operation of the motor system. The authors recently described distinct and overlapping representations of movement kinematics in the subthalamic nucleus (STN), but it is still unclear how movement pace is modulated according to the demands of the task at the neuronal level in this area. The goal of this study was to clarify how different movement paces are being controlled by neurons in the STN. METHODS The authors performed direct recording of the electrical activity of single neurons in the STN of neurosurgical patients with Parkinson's disease undergoing implantation of a deep brain stimulator under local anesthesia while the patients performed repetitive foot and hand movements intraoperatively at multiple paces...
June 22, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29799675/the-changes-of-cerebral-hemodynamics-during-ketamine-induced-anesthesia-in-a-rat-model
#3
Jayyoung Bae, Teo J Shin, Seonghyun Kim, Dong-Hyuk Choi, Dongrae Cho, Jinsil Ham, Marco Manca, Seongwook Jeong, Boreom Lee, Jae G Kim
Current electroencephalogram (EEG) based-consciousness monitoring technique is vulnerable to specific clinical conditions (eg, epilepsy and dementia). However, hemodynamics is the most fundamental and well-preserved parameter to evaluate, even under severe clinical situations. In this study, we applied near-infrared spectroscopy (NIRS) system to monitor hemodynamic change during ketamine-induced anesthesia to find its correlation with the level of consciousness. Oxy-hemoglobin (OHb) and deoxy-hemoglobin concentration levels were continuously acquired throughout the experiment, and the reflectance ratio between 730 and 850 nm was calculated to quantify the hemodynamic changes...
May 25, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29790382/toward-respiratory-gated-retrograde-intrarenal-surgery-a-prospective-controlled-randomized-study
#4
Vasileios Kourmpetis, Snir Dekalo, Nadav Levy, Tomer Nir, Yuval Bar-Yosef, Avi Beri, Ofer Yossepowitch, Mario Sofer
INTRODUCTION: We set out to investigate whether general anesthesia with low ventilation (LV, respiratory rate ≤8/minute and tidal volume <500 mL) could reduce renal mobility and thereby facilitate improved retrograde intrarenal surgery (RIRS) compared with general anesthesia with standard ventilation (SV). MATERIALS AND METHODS: All 60 consecutive patients who presented for RIRS in our department from September 1, 2017 to December 31, 2017 were prospectively randomized 1:1 into one group that was selected to receive SV and another that received LV...
June 21, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29485961/cerebral-function-and-perfusion-during-cardiopulmonary-bypass-a-plea-for-a-multimodal-monitoring-approach
#5
Marcus Thudium, Ingo Heinze, Richard K Ellerkmann, Tobias Hilbert
BACKGROUND: Postoperative neurological injury still represents a major cause of morbidity after cardiac surgery. Our objective was to compare the limits as well as advantages of routine monitoring tools for the detection of cerebral function and perfusion deficits during cardiopulmonary bypass in a daily clinical setting. METHODS: Adult patients undergoing elective cardiac surgery with use of cardiopulmonary bypass were included. Patients received monitoring comprising Bispectral Index (BIS), Near Infrared Spectroscopy (NIRS) and assessment of middle cerebral artery flow velocity (MCAV) using transcranial Doppler (TCD) sonography...
January 31, 2018: Heart Surgery Forum
https://www.readbyqxmd.com/read/29330639/changes-in-tissue-and-cerebral-oxygenation-following-spinal-anesthesia-in-infants-a-prospective-study
#6
Alexander B Froyshteter, Dmitry Tumin, Emmett E Whitaker, David P Martin, Mumin Hakim, Hina Walia, Tarun Bhalla, Joseph D Tobias
Use of spinal anesthesia (SA) in children may address concerns about potential neurocognitive effects of general anesthesia. We used near-infrared spectroscopy (NIRS) to assess the effects of SA on cerebral and tissue oxygenation in 19 patients aged 7 ± 3 months. Prior to SA placement, NIRS monitors were placed on the forehead (cerebral) and the thigh (tissue). Intraoperative cerebral and tissue saturation were 73 ± 7 and 80 ± 11%, respectively, before SA placement. NIRS measurements were monitored every minute for 30 min after SA placement and modeled using mixed-effects linear regression...
April 2018: Journal of Anesthesia
https://www.readbyqxmd.com/read/29317969/pulse-pressure-analysis-to-guide-intraoperative-phlebotomy-prior-to-cardiac-surgery
#7
Brian Schloss, Dmitry Tumin, Aymen Naguib, Julie Rice, Mark Galantowicz, Joseph D Tobias
Background: The aim of this study was to evaluate the response of the LiDCO-rapid™ during intraoperative phlebotomy in anesthetized children prior to surgery for congenital heart disease. Methods: After the induction of general anesthesia and endotracheal intubation, baseline vital signs were recorded, along with pulse pressure variability (PPV) and stroke volume variability (SVV) from the LiDCO-rapid™ and cerebral oxygenation (rSO2 ) using near-infrared spectroscopy (NIRS)...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29306241/the-relationship-between-the-trendelenburg-position-and-cerebral-hypoxia-inpatients-who-have-undergone-robot-assisted-hysterectomy-and-prostatectomy
#8
Ali Özgün, Asuman Sargın, Semra Karaman, İlkben Günüşen, Işık Alper, Fatma Zekiye Aşkar
Background/aim: This study aimed to evaluate the relationship between the Trendelenburg position and cerebral hypoxia in robot-assisted hysterectomy and prostatectomy.Materials and methods: A standardized mini-mental state examination was administered to 50 patients enrolled in the study 1 h before and after surgery. Near infrared spectroscopy (NIRS) values and hemodynamic and respiratory parameters were recorded after induction of anesthesia (baseline) and once every 20 min in the Trendelenburg position and supine positions...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29229261/preliminary-experience-in-combined-somatic-and-cerebral-oximetry-monitoring-in-liver-transplantation
#9
Tina Hu, Yves Collin, Réal Lapointe, François Martin Carrier, Luc Massicotte, Annik Fortier, Jean Lambert, Franck Vandenbroucke-Menu, André Y Denault
OBJECTIVE: The use of cerebral near-infrared spectroscopy (NIRS) has become widespread in cardiac surgery after research demonstrated an association between perioperative cerebral desaturations and postoperative complications. Somatic NIRS desaturation also is associated with an increased risk of postoperative complications and mortality. The objective of this study was to explore the trends of both somatic and cerebral NIRS during liver transplantation. DESIGN: A prospective, single-site, observational case series...
February 2018: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28836009/contralateral-cerebral-hemoglobin-oxygen-saturation-changes-in-patients-undergoing-thoracotomy-with-general-anesthesia-with-or-without-paravertebral-block-a-randomized-controlled-trial
#10
RANDOMIZED CONTROLLED TRIAL
Keika Mukaihara, Maiko Hasegawa-Moriyama, Yuichi Kanmura
PURPOSE: Perioperative analgesia during thoracotomy is often achieved by combining paravertebral block (PVB) with general anesthesia (GA). Functional near-infrared spectroscopy (NIRS) can detect changes in cerebral oxygenation resulting from nociceptive stimuli in the awake state or under sedation. We used NIRS to measure changes in cerebral blood flow provoked by thoracotomy incision made under GA and determine how these changes were influenced by supplementation of GA with PVB. METHODS: Thirty-four patients undergoing elective thoracotomy were enrolled...
December 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28800981/near-infrared-spectroscopy-in-adult-cardiac-surgery-patients-a-systematic-review-and-meta-analysis
#11
REVIEW
Matthew J Chan, Tricia Chung, Neil J Glassford, Rinaldo Bellomo
OBJECTIVES: To identify the normal baseline preoperative range of cerebral tissue oxygen saturation (SctO2 ) derived using near-infrared spectroscopy (NIRS) and the efficacy of perioperative interventions designed to modulate SctO2 in cardiac surgical patients. DESIGN: Systematic review and meta-analysis of relevant randomized controlled trials (RCTs) extracted from the Medline, Embase, and Cochrane Central Register of Controlled Trials databases. SETTING: Hospitals performing cardiac surgery...
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28742709/prospective-evaluation-of-precision-multimodal-gallbladder-surgery-navigation-virtual-reality-near-infrared-fluorescence-and-x-ray-based-intraoperative-cholangiography
#12
Michele Diana, Luc Soler, Vincent Agnus, Antonio D'Urso, Michel Vix, Bernard Dallemagne, Vanina Faucher, Catherine Roy, Didier Mutter, Jacques Marescaux, Patrick Pessaux
OBJECTIVE: We aimed to prospectively evaluate NIR-C, VR-AR, and x-ray intraoperative cholangiography (IOC) during robotic cholecystectomy. BACKGROUND: Near-infrared cholangiography (NIR-C) provides real-time, radiation-free biliary anatomy enhancement. Three-dimensional virtual reality (VR) biliary anatomy models can be obtained via software manipulation of magnetic resonance cholangiopancreatography, enabling preoperative VR exploration, and intraoperative augmented reality (AR) navigation...
November 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28215468/outcome-of-patients-undergoing-tavr-with-and-without-the-attendance-of-an-anesthesiologist
#13
COMPARATIVE STUDY
Maayan Konigstein, Jeremy Ben-Shoshan, David Zahler, Nir Flint, Gilad Margolis, Yoav Granot, Galit Aviram, Amir Halkin, Gad Keren, Shmuel Banai, Ariel Finkelstein
BACKGROUND: During the last few years there is a shift from performing Transcatheter Aortic Valve Replacement (TAVR) under general anesthesia towards conscious sedation and local anesthesia only. In the vast majority of centers, sedation is guided by a qualified anesthesiologist. In our center, all TAVR procedures are being performed under local anesthesia and mild sedation, however, since September 2014, a large portion of TAVR procedures are being performed under local anesthesia without the presence of an anesthesiologist...
August 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28199475/examiner-s-finger-mounted-near-infrared-spectroscopy-is-feasible-to-analyze-cerebral-and-skeletal-muscle-oxygenation-in-conscious-chihuahuas
#14
Keisuke Hiwatashi, Kimiaki Doi, Risuke Mizuno, Makoto Yokosuka
To measure regional saturation of oxygen ( rSO 2 ) of hemoglobin and total hemoglobin index (HbI) in the brain (through the molera of the head) and skeletal muscle (musculus gracilis) of conscious Chihuahua dogs using an examiner’s finger-mounted near-infrared spectroscopy (NIRS) device, Toccare, we investigated brain and skeletal muscle NIRS in 48 Chihuahuas without severe disease. To measure rSO 2 and total HbI, a Toccare probe was placed on the molera of the head and musculus gracilis of each dog for real-time recording...
February 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28058845/ultrasensitive-phototriggered-local-anesthesia
#15
Changyou Zhan, Weiping Wang, Claudia Santamaria, Bruce Wang, Alina Rwei, Brian P Timko, Daniel S Kohane
An injectable local anesthetic producing repeatable on-demand nerve block would be desirable for pain management. Here we present a phototriggerable device to achieve repeatable and adjustable on-demand local anesthesia in superficial or deep tissues, consisting of gold nanorods attached to low temperature sensitive liposomes (LTSL). The particles were loaded with tetrodotoxin and dexmedetomidine. Near-infrared light (NIR, 808 nm, continuous wave) could heat gold nanorods at low fluence (short duration and low irradiance), leading to rapid release of payload...
February 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/27910802/near-infrared-spectroscopy-evaluated-cerebral-oxygenation-during-anesthesia
#16
REVIEW
Henrik Sørensen
Likely, maintained organ and notably cerebral perfusion, secures rapid recovery following anesthesia. To secure cerebral blood flow (CBF) at least mean arterial pressure (MAP) and the arterial carbon dioxide tension (PaCO2 ) need to be considered. CBF is "autoregulated", i.e. stays more or less stable within a MAP of 50-150 mmHg, but the lower limit appears to depend on the central blood volume and/or cardiac output, illustrated by a decrease in CBF at a MAP of 80 mmHg with a compromised central blood volume, while CBF remains constant with a MAP < 40 mmHg, if the central blood volume is maintained...
December 2016: Danish Medical Journal
https://www.readbyqxmd.com/read/27878503/evaluation-of-different-near-infrared-spectroscopy-technologies-for-assessment-of-tissue-oxygen-saturation-during-a-vascular-occlusion-test
#17
Kevin Steenhaut, Koen Lapage, Thierry Bové, Stefan De Hert, Annelies Moerman
An increasing number of NIRS devices are used to provide measurements of peripheral tissue oxygen saturation (St O2 ). The aim of the present study is to test the hypothesis that despite technological differences between devices, similar trend values will be obtained during a vascular occlusion test. The devices compared are NIRO-200NX, which measures St O2 and oxyhemoglobin by spatially resolved spectroscopy and the Beer-Lambert law, respectively, and INVOS 5100C and Foresight Elite, which both measure St O2 with the Beer-Lambert law, enhanced with the spatial resolution technique...
December 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27867719/monitoring-cerebral-oxygenation-and-local-field-potential-with-a-variation-of-isoflurane-concentration-in-a-rat-model
#18
Dong-Hyuk Choi, Teo Jeon Shin, Seonghyun Kim, Jayyoung Bae, Dongrae Cho, Jinsil Ham, Ji-Young Park, Hyoung-Ihl Kim, Seongwook Jeong, Boreom Lee, Jae Gwan Kim
We aimed to investigate experimentally how anesthetic levels affect cerebral metabolism measured by near-infrared spectroscopy (NIRS) and to identify a robust marker among NIRS parameters to discriminate various stages of anesthetic depth in rats under isoflurane anesthesia. In order to record the hemodynamic changes and local field potential (LFP) in the brain, fiber-optic cannulae and custom-made microelectrodes were implanted in the frontal cortex of the skull. The NIRS and LFP signals were continuously monitored before, during and after isoflurane anesthesia...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27415436/capturing-pain-in-the-cortex-during-general-anesthesia-near-infrared-spectroscopy-measures-in-patients-undergoing-catheter-ablation-of-arrhythmias
#19
Barry D Kussman, Christopher M Aasted, Meryem A Yücel, Sarah C Steele, Mark E Alexander, David A Boas, David Borsook, Lino Becerra
The predictability of pain makes surgery an ideal model for the study of pain and the development of strategies for analgesia and reduction of perioperative pain. As functional near-infrared spectroscopy reproduces the known functional magnetic resonance imaging activations in response to a painful stimulus, we evaluated the feasibility of functional near-infrared spectroscopy to measure cortical responses to noxious stimulation during general anesthesia. A multichannel continuous wave near-infrared imager was used to measure somatosensory and frontal cortical activation in patients undergoing catheter ablation of arrhythmias under general anesthesia...
2016: PloS One
https://www.readbyqxmd.com/read/27351182/noninvasive-methods-of-detecting-increased-intracranial-pressure
#20
REVIEW
Wen Xu, Patrick Gerety, Tomas Aleman, Jordan Swanson, Jesse Taylor
The detection of elevated intracranial pressure (ICP) is of paramount importance in the diagnosis and management of a number of neurologic pathologies. The current gold standard is the use of intraventricular or intraparenchymal catheters; however, this is invasive, expensive, and requires anesthesia. On the other hand, diagnosing intracranial hypertension based on clinical symptoms such as headaches, vomiting, and visual changes lacks sensitivity. As such, there exists a need for a noninvasive yet accurate and reliable method for detecting elevated ICP...
August 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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