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Physiology and anesthesia

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https://www.readbyqxmd.com/read/28544930/neural-oscillations-demonstrate-that-general-anesthesia-and-sedative-states-are-neurophysiologically-distinct-from-sleep
#1
REVIEW
Oluwaseun Akeju, Emery N Brown
General anesthesia is a man-made neurophysiological state comprised of unconsciousness, amnesia, analgesia, and immobility along with maintenance of physiological stability. Growing evidence suggests that anesthetic-induced neural oscillations are a primary mechanism of anesthetic action. Each anesthetic drug class produces distinct oscillatory dynamics that can be related to the circuit mechanisms of drug action. Sleep is a naturally occurring state of decreased arousal that is essential for normal health...
May 22, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28544893/agreement-of-invasive-and-non-invasive-blood-pressure-measurements-in-anaesthetised-pigs-using-the-surgivet-v9203
#2
Philomena P Tuohy, Anthea L Raisis, Eleanor A Drynan
The automated oscillometric method is a common method for measuring blood pressure non-invasively and is broadly and confidently used in the veterinary setting. Twenty-one pigs undergoing anesthesia for exploratory laparotomy were enrolled in a study to evaluate the performance of the Surgivet V9203 non-invasive blood pressure (NIBP) monitor. The aim was to compare measurements of arterial blood pressure obtained simultaneously using the Surgivet V9203 oscillometric system and an intra-arterial catheter-transducer system, both at the level of the metatarsus...
May 19, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28533746/intraoperative-frontal-alpha-band-power-correlates-with-preoperative-neurocognitive-function-in-older-adults
#3
Charles M Giattino, Jacob E Gardner, Faris M Sbahi, Kenneth C Roberts, Mary Cooter, Eugene Moretti, Jeffrey N Browndyke, Joseph P Mathew, Marty G Woldorff, Miles Berger
Each year over 16 million older Americans undergo general anesthesia for surgery, and up to 40% develop postoperative delirium and/or cognitive dysfunction (POCD). Delirium and POCD are each associated with decreased quality of life, early retirement, increased 1-year mortality, and long-term cognitive decline. Multiple investigators have thus suggested that anesthesia and surgery place severe stress on the aging brain, and that patients with less ability to withstand this stress will be at increased risk for developing postoperative delirium and POCD...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28533694/the-improved-quality-of-postoperative-analgesia-after-intrathecal-morphine-does-not-result-in-improved-recovery-and-quality-of-life-in-the-first-6-months-after-orthopedic-surgery-a-randomized-controlled-pilot-study
#4
Nilufar Foadi, Matthias Karst, Anika Frese-Gaul, Niels Rahe-Meyer, Stefan Krömer, Christian Weilbach
OBJECTIVE: In orthopedic surgery, it is well known that the use of intrathecal morphine (ITM) leads to an improved quality of postoperative analgesia. Little is known how this improved analgesia affects the long-term course after surgery. STUDY DESIGN: A randomized, double-blind trial. SETTING: Academic medical center. SUBJECTS: Forty-nine patients undergoing total hip or knee replacement surgery in spinal anesthesia...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28533108/hyaluronidase-administered-with-xylazine-tiletamine-zolazepam-into-adipose-tissue-shortens-recovery-from-anesthesia-in-pigs
#5
Shayne P Bisetto, Adriano B Carregaro, André E S Nicolai, Thais F Bressan, William P Leal, Nathalia V Xavier, Diego F Leal, André F C Andrade
OBJECTIVE: To evaluate the effect of hyaluronidase on uptake, duration and speed of elimination of xylazine-tiletamine-zolazepam administered in the subcutaneous fat over the dorsal lumbar region of swine. STUDY DESIGN: Blinded, randomized, crossover study. ANIMALS: Six healthy Landrace/Large White pigs weighing 132±24 kg (mean±standard deviation). METHODS: Animals were administered xylazine (1 mg kg(-1)) and tiletamine-zolazepam (8 mg kg(-1)) (control treatment, CON), or xylazine-tiletamine-zolazepam at the same doses with hyaluronidase (400 IU) (treatment HYA)...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28526162/pharmacologic-considerations-of-anesthetic-agents-in-pediatric-patients-a-comprehensive-review
#6
REVIEW
Alan D Kaye, Charles J Fox, Ira W Padnos, Ken P Ehrhardt, James H Diaz, Elyse M Cornett, Debbie Chandler, Sudipta Sen, Shilpadevi Patil
Acute pain in the pediatric population has important differences in terms of biology, intrapopulation variation, and epidemiology. Discussion as to the pharmacologic considerations of anesthetic agents, such as induction agents, neuromuscular blockers, opioids, local anesthetics, and adjuvant agents, is presented in this article. Special considerations and concerns, such as risk for propofol infusion syndrome and adverse potential side effects of anesthesia agents, are discussed. Anesthesiologists managing pediatric patients need to have a firm understanding of physiologic and pharmacologic differences compared with the adult population...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28514241/phrenic-nerve-palsy-and-regional-anesthesia-for-shoulder-surgery-anatomical-physiologic-and-clinical-considerations
#7
Kariem El-Boghdadly, Ki Jinn Chin, Vincent W S Chan
Regional anesthesia has an established role in providing perioperative analgesia for shoulder surgery. However, phrenic nerve palsy is a significant complication that potentially limits the use of regional anesthesia, particularly in high-risk patients. The authors describe the anatomical, physiologic, and clinical principles relevant to phrenic nerve palsy in this context. They also present a comprehensive review of the strategies for reducing phrenic nerve palsy and its clinical impact while ensuring adequate analgesia for shoulder surgery...
May 17, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28507056/parallel-in-vivo-monitoring-of-ph-in-gill-capillaries-and-muscles-of-fishes-using-microencapsulated-biomarkers
#8
Ekaterina Borvinskaya, Anton Gurkov, Ekaterina Shchapova, Boris Baduev, Zhanna Shatilina, Anton Sadovoy, Igor Meglinski, Maxim Timofeyev
Tracking physiological parameters in different organs within the same organism simultaneously and in real time can provide an outstanding representation of the organism's physiological status. The state-of-the-art technique of using encapsulated fluorescent molecular probes (microencapsulated biomarkers) is a unique tool that can serve as a platform for the development of new methods to obtain in vivo physiological measurements and is applicable to a broad range of organisms. Here, we describe a novel technique to monitor the pH of blood inside the gill capillaries and interstitial fluid of muscles by using microencapsulated biomarkers in a zebrafish model...
May 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28501131/microrna-203-promotes-liver-regeneration-after-partial-hepatectomy-in-cirrhotic-rats
#9
Xiao-Bo Chen, Xiao-Bo Zheng, Zhen-Xing Cai, Xian-Jian Lin, Ming-Qing Xu
BACKGROUND: Liver resection or partial hepatectomy (PH) is still the most commonly used therapeutic option for hepatocellular carcinoma (HCC) at present. However, the impaired regenerative ability induced by the accompanied liver cirrhosis is an important risk factor of posthepatectomy liver failure, and posthepatectomy liver failure is a feared complication that accounts for up to 75% of mortality after extensive liver resection. MicroRNA(miR)-203 is a tumor suppressor of HCC and may act as a positive intermediary in A20-enhanced interleukin (IL-6)/signal transducer and activator of transcription 3 (STAT3) pro-proliferative signals, which may promote liver regeneration after PH...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28499298/-cochlear-implant-state-of-the-art
#10
Thomas Lenarz
Cochlear implants are the treatment of choice for the auditory rehabilitation of patients with sensory deafness. They restore the missing function of inner hair cells by transforming the acoustic signal into electrical stimuli for activation of auditory nerve fibers. Due to the very fast technology development cochlear implants provide open-set speech understanding in the majority of patients including the use of the telephone. Children can achieve a near to normal speech and language development provided their deafness is detected early after onset and implantation is performed quickly thereafter...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28488169/cerebral-oxygen-desaturation-occurs-frequently-in-patients-with-hypertension-undergoing-major-abdominal-surgery
#11
Hongyi Li, Qiaochu Fu, Zongfang Wu, Jiaoli Sun, Anne Manyande, Hui Yang, Peng Wang
Hypertensive patients are more likely to experience latent cerebral ischemia causing regional cerebral oxygen saturation (rSO2) decrease during general anesthesia. The aim of this prospective observational study was to assess the incidence of decreased rSO2 in hypertensive patients undergoing major abdominal surgery and the perioperative factors affecting this change in rSO2. A total of 41 hypertensive patients were enrolled and stratified according to their hypertension as controlled and uncontrolled. The intraoperative rSO2 and physiological data were routinely collected...
May 9, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28487877/preoperative-fasting-among-adult-patients-for-elective-surgery-in-a-kenyan-referral-hospital
#12
George Njoroge, Lucy Kivuti-Bitok, Samuel Kimani
Background. Preoperative fasting (POF) is physiologically and precautionary important during anesthesia and surgery. POF from midnight has been practiced despite the recommended shorter practice. Objective. Assessing preoperative fasting among adult patients scheduled for elective surgery at Kenyatta National Hospital (KNH). Methods. A descriptive cross-sectional study involving 65 surgical patients. A questionnaire of mixed questions on demographics, reasons, source of instructions, opinion on instructions, time, premedication practices, outcome, and complains on NPO was used...
2017: International Scholarly Research Notices
https://www.readbyqxmd.com/read/28486318/asking-a-better-question-development-and-evaluation-of-the-need-for-trauma-intervention-nfti-metric-as-a-novel-indicator-of-major-trauma
#13
Jacob W Roden-Foreman, Nakia R Rapier, Luanna Yelverton, Michael L Foreman
Many existing metrics, such as Injury Severity Score (ISS), cannot fully describe many trauma patients because of comorbidities. This study developed and evaluated the Need For Trauma Intervention (NFTI) metric as a novel indicator of major trauma. The NFTI metric was developed from an analysis of 2,396 trauma patients at a Level I trauma center. Six commonly recorded registry variables were found to be indicative of major trauma and comprised the NFTI criteria: receiving packed red blood cells within 4 hr; discharge from the emergency department (ED) to the operating room within 90 min; discharge from the ED to interventional radiology; discharge from the ED to the intensive care unit (ICU) with an ICU length of stay (LOS) of 3 or more days; mechanical ventilation outside of procedural anesthesia within 3 days; or death within 60 hr...
May 2017: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/28484741/effects-of-clove-oil-and-lidocaine-hcl-anesthesia-on-water-parameter-during-simulated-transportation-in-the-marine-medaka-oryzias-dancena
#14
In-Seok Park, Hyun Woo Gil, Tae Ho Lee, Yoon Kwon Nam, Sang Gu Lim, Dong Soo Kim
Optimum concentrations of anesthetic clove oil and anesthetic lidocaine-HCl were determined for a species of adult marine medaka, Oryzias dancena, over a range of salinity conditions, and investigated in a transport simulation experiment by analyzing various water and physiological parameters. Research indicated that the higher the concentration of anesthetic at each salinity, the shorter the anesthesia time at each salinity. At each concentration, fish were anesthetized slower at water salinities over 10 ppt (P<0...
March 2017: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28482650/obesity-and-perioperative-noninvasive-ventilation-in-bariatric-surgery
#15
Michele Carron, Francesco Zarantonello, Giovanna Ieppariello, Carlo Ori
The incidence and prevalence of obesity continues to increase globally. Physicians will therefore provide care for an increasing number of obese patients in their clinical practice. Optimal management of these patients is required to minimize the risk of perioperative complications that increase morbidity and mortality. Obesity affects the respiratory function. It is generally associated with reduced lung volume with increased atelectasis, decreased lung and chest wall compliance, increased airway resistance, and moderate to severe hypoxemia...
June 2017: Minerva Chirurgica
https://www.readbyqxmd.com/read/28479737/flavonoids-from-whole-plant-of-euphorbia-hirta-and-their-evaluation-against-experimentally-induced-gastroesophageal-reflux-disease-in-rats
#16
Shyam Sundar Gupta, Lubna Azmi, P K Mohapatra, Ch V Rao
BACKGROUND: Euphorbia hirta possesses antibacterial, anti-inflammatory, galactogenic, antidiarrheal, antioxidant, hypoglycemic, antiasthmatic, antiamebic, antifungal, and antimalarial activities. OBJECTIVE: The overall objective of the current study was the investigation of the whole plant extract of E. hirta and flavonoids from E. hirta on gastroesophageal reflux disease (GERD) in rats. MATERIALS AND METHODS: The whole plant extract of E...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28476663/a-probabilistic-template-of-human-mesopontine-tegmental-nuclei-from-in-vivo-7-t-mri
#17
REVIEW
Marta Bianciardi, Christian Strong, Nicola Toschi, Brian L Edlow, Bruce Fischl, Emery N Brown, Bruce R Rosen, Lawrence L Wald
Mesopontine tegmental nuclei such as the cuneiform, pedunculotegmental, oral pontine reticular, paramedian raphe and caudal linear raphe nuclei, are deep brain structures involved in arousal and motor function. Dysfunction of these nuclei is implicated in the pathogenesis of disorders of consciousness and sleep, as well as in neurodegenerative diseases. However, their localization in conventional neuroimages of living humans is difficult due to limited image sensitivity and contrast, and a stereotaxic probabilistic neuroimaging template of these nuclei in humans does not exist...
May 2, 2017: NeuroImage
https://www.readbyqxmd.com/read/28467607/environmental-temperature-affect-physiology-and-survival-of-nanosecond-pulsed-electric-field-treated-cells
#18
Shengyong Yin, Xudong Miao, Xueming Zhang, Xinhua Chen, Hao Wen
Nanosecond pulsed electric field (nsPEF) is a novel non-thermal tumor ablation technique. However, how nsPEF affect cell physiology at different environmental temperature is still kept unknown. But this issue is of critical clinical practice relevance. This work aim to investigate how nsPEF treated cancer cells react to different environmental temperatures (0°C, 4°C, 25°C and 37°C). Their cell viability, apoptosis, mitochondrial membrane potential, and reactive oxygen species (ROS) were examined. Lower temperature resulted in higher apoptosis rate, decreased mitochondria membrane potential and increased ROS levels...
May 3, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28459733/a-phase-1-single-center-double-blind-placebo-controlled-study-in-healthy-subjects-to-assess-the-safety-tolerability-clinical-effects-and-pharmacokinetics-pharmacodynamics-of-intravenous-cyclopropyl-methoxycarbonylmetomidate-abp-700-after-a-single-ascending
#19
Michel M R F Struys, Beatrijs I Valk, Douglas J Eleveld, Anthony R Absalom, Peter Meyer, Sascha Meier, Izaak den Daas, Thomas Chou, Kai van Amsterdam, Jason A Campagna, Steven P Sweeney
BACKGROUND: Cyclopropyl-methoxycarbonylmetomidate (ABP-700) is a new "soft" etomidate analog. The primary objectives of this first-in-human study were to describe the safety and efficacy of ABP-700 and to determine its maximum tolerated dose. Secondary objectives were to characterize the pharmacokinetics of ABP-700 and its primary metabolite (cyclopropyl-methoxycarbonyl acid), to assess the clinical effects of ABP-700, and to investigate the dose-response and pharmacokinetic/pharmacodynamic relationships...
May 1, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28434475/music-listening-alleviates-anxiety-and-physiological-responses-in-patients-receiving-spinal-anesthesia
#20
Wen-Ping Lee, Pao-Yuan Wu, Meng-Ying Lee, Lun-Hui Ho, Whei-Mei Shih
OBJECTIVE: The aim of this study was to explore the effects of listening to music on the anxiety levels and physiological responses of surgical patients receiving spinal anesthesia. METHODS: An experimental design was used in the study with an experimental group (n=50) and a control group (n=50). The experimental group received 30min of musical intervention and routine nursing care in the Post-Anesthesia Care Unit (PACU) while the control group received only routine nursing care...
April 2017: Complementary Therapies in Medicine
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