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İnhaler anesthetics

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https://www.readbyqxmd.com/read/29150782/nitrous-oxide-added-at-the-end-of-isoflurane-anesthesia-hastens-early-recovery-without-increasing-the-risk-for-postoperative-nausea-and-vomiting-a-randomized-clinical-trial
#1
Boris Mraovic, Tatjana Simurina, Tong J Gan
BACKGROUND: Nitrous oxide (N2O) has been reported to increase the risk of postoperative nausea and vomiting (PONV) in a dose-dependent manner. We investigated the effect of adding N2O at the end of isoflurane inhalational anesthesia on the recovery and incidence of PONV. Our hypothesis was that N2O would reduce the time to early recovery without increasing the incidence of PONV. METHODS: After obtaining ethics committee approval and written informed consent, 100 women at American Society of Anesthesiologists physical status I-III and scheduled for laparoscopic-assisted vaginal hysterectomy were randomized into two groups (G) according to the carrier gas: GO2 (air in 30% oxygen) and GN2O (the same mixture until the last 30 min of surgery, when 70% N2O in 30% oxygen was used)...
November 17, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29148158/long-term-anesthetic-protocol-in-rats-feasibility-in-electrophysiology-studies-in-visual-prosthesis
#2
Alejandro Barriga-Rivera, Veronica Tatarinoff, Nigel H Lovell, John W Morley, Gregg J Suaning
Electrical stimulation of excitable cells provides therapeutic benefits for a variety of medical conditions, including restoration of partial vision to those blinded via some types of retinal degeneration. To improve visual percepts elicited by the current technology, researchers are conducting acute electrophysiology experiments, mainly in cats. However, the rat can provide a model of a range of retinal diseases and possesses a sufficiently large eye to be used in this field. This article presents a long-term anesthetic protocol to enable electrophysiology experiments to further the development of visual prostheses...
November 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29118914/the-neuroprotective-effects-of-remifentanil-on-isoflurane-induced-apoptosis-in-the-neonatal-rat-brain
#3
Bo Pan, Shaoqiang Huang, Shen Sun, Tingting Wang
Remifentanil is one of the most frequently prescribed opioids used in combination with inhalation anesthetics in clinical practice, but the effects of such combinations on the developing rat brain are unknown. In our study, we investigated first the potential neurotoxic effects of remifentanil on the developing brain and then the effects of remifentanil on isoflurane-induced apoptosis in the neonatal rat brain following exposure to a nociceptive stimulus. In the first experiment, postnatal day (P) 7 rats were randomly exposed to 30% oxygen, 1...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29112511/an-anesthesiologist-s-perspective-on-the-history-of-basic-airway-management-the-progressive-era-1904-to-1960
#4
Adrian A Matioc
This third installment of the history of basic airway management discusses the transitional-"progressive"-years of anesthesia from 1904 to 1960. During these 56 yr, airway management was provided primarily by basic techniques with or without the use of a face mask. Airway maneuvers were inherited from the artisanal era: head extension and mandibular advancement. The most common maneuver was head extension, also used in bronchoscopy and laryngoscopy. Basic airway management success was essential for traditional inhalation anesthesia (ether, chloroform) and for the use of the new anesthetic agents (cyclopropane, halothane) and intravenous drugs (thiopental, curare, succinylcholine)...
November 7, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29098494/toxicity-of-inhaled-agents-after-prolonged-administration
#5
Panumart Manatpon, W Andrew Kofke
Inhaled anesthetics have been utilized mostly for general anesthesia in the operating room and oftentimes for sedation and for treatment of refractory status epilepticus and status asthmaticus in the intensive care unit. These contexts in the ICU setting are related to potential for prolonged administration wherein potential organ toxicity is a concern. Over the last decade, several clinical and animal studies of neurotoxicity attributable to inhaled anesthetics have been emerging, particularly in extremes of age...
November 2, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29097758/isoflurane-inhalation-anesthesia-should-be-a-new-requirement-in-intracavernosal-pressure-detection-the-gold-standard-of-erectile-function-assessment
#6
Jinhong Li, Changjing Wu, Fudong Fu, Xuanhe You, Liang Gao, Romel Wazir, Feng Qin, Ping Han, Jiuhong Yuan
Intracavernosal pressure (ICP) is gold standard for the detection of erectile function in animals, but no consensus has yet been achieved on what kind of anesthetic protocol should be applied. A total of 16 adult male Sprague-Dawley rats were randomized into two groups. In group A, chloral hydrate was injected intraperitoneally. Rats in group B were induced in 5% isoflurane for 3 min and then maintained in 1.0-1.5% isoflurane. Mean arterial pressure (MAP), respiratory rate (RR) and heart rate were monitored during all experiments...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29094418/total-intravenous-anesthesia-vs-single-pharmacological-prophylaxis-to-prevent-postoperative-vomiting-in-children-a-systematic-review-and-meta-analysis
#7
REVIEW
Maximilian S Schaefer, Peter Kranke, Stephanie Weibel, Robert Kreysing, Janika Ochel, Peter Kienbaum
BACKGROUND: Postoperative nausea and postoperative vomiting are frequent but often missed complications after general anesthesia in pediatric patients. Because inhaled anesthetics are known to trigger postoperative vomiting, total intravenous anesthesia is often administered in high-risk children to avoid the use of inhalational anesthesia. Since inhalational anesthesia might be advantageous in some situations, the question is raised whether administration of pharmacological prophylaxis offers equal protection from postoperative vomiting compared with total intravenous anesthesia alone...
December 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29081093/-the-protective-effect-of-n-acetylcysteine-on-acute-lung-injury-induced-by-pfib-inhalation
#8
L M Yang, J Zhao, H T Wang, X X Xu, Y M JIiao, R G Ding
Objective: To study the protective effect of N-acetylcysteine on acute lung injury induced by PFIB inhalation and its mechanism. Methods: Survival experiment: 48 male ICR (CD-1) mice were randomly divided into 4 groups, i. e., PFIB control group, NAC prevention group, NAC treatment group, and NAC prevention + treatment group, each group contains 12 animals. The mice of PFIB C group were exposed to PFIB without any treatment. The mice of NAC P group were exposed to PFIB 30min after NAC administration. The mice of NAC T group were exposed to PFIB 1h before NAC administration, The mice of NAC P+T group were administrated with NAC twice (30 min before and 1h after PFIB inhalation) ...
July 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29077151/relationship-between-blood-remifentanil-concentration-and-stress-hormone-levels-during-pneumoperitoneum-in-patients-undergoing-laparoscopic-cholecystectomy
#9
P Aceto, C Dello Russo, C Lai, V Perilli, N Fucci, N De Giovanni, A Piras, P Navarra, L Sollazzi
OBJECTIVE: The effect of remifentanil on stress response to surgery is unclear. However, there are not clinical studies investigating the relationship between blood remifentanil concentrations and stress hormones. Therefore, the aim of the present study was to assess the association between blood remifentanil concentrations measured after pneumoperitoneum and cortisol (CORT) or prolactin (PRL) ratio (intraoperative/preoperative value), in patients undergoing laparoscopic cholecystectomy...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29074343/different-doses-of-sevoflurane-facilitate-and-impair-learning-and-memory-function-through-activation-of-the-erk-pathway-and-synthesis-of-arc-protein-in-the-rat-hippocampus
#10
Qian-Lin Zhu, Yan Luo, Qing-Sheng Xue, Fu-Jun Zhang, Bu-Wei Yu
BACKGROUND: Sevoflurane has been shown to stimulate or depress memory in adult rats; however, the cellular mechanism of this bidirectional effect has not been fully investigated. METHODS: We used an intra-hippocampal microinfusion of U0126 to suppress ERK activation. Male SD rats were randomly assigned to four groups: Sham, 0.11% SEV, 0.3% SEV and 0.3%+U0126. They received bilateral injections of U0126 or saline. Rats were anesthetized, and Inhibitory Avoidance (IA) training was performed immediately after anesthesia...
October 23, 2017: Brain Research
https://www.readbyqxmd.com/read/29073151/inhalation-of-volatile-anesthetics-via-a-laryngeal-mask-is-associated-with-lower-incidence-of-intraoperative-awareness-in-non-critically-ill-patients
#11
Pei-Jen Kuo, Chia-Ling Lee, Jen-Huang Wang, Shiu-Ying Hsieh, Shian-Che Huang, Chen-Fuh Lam
BACKGROUND: Increased incidence of intraoperative awareness was reported in critically ill patients during major operations, particularly under total intravenous (TIVA) or endotracheal general anesthesia (ETGA). However, the incidence and effect of anesthesia techniques on awareness in generally healthy, non-critically ill patients during operations have yet to receive significant attention. METHODS AND RESULTS: This retrospective matched case-control study was conducted between January 2009 to December 2014...
2017: PloS One
https://www.readbyqxmd.com/read/29072862/lymph-drainage-from-the-chylocyst-induced-hemodilution-in-an-in-vivo-rabbit-study
#12
Kumiko Ajima, Yoshiko Kawai, Daisuke Maejima, Shigeru Suzuki, Sachiho Yano, Moyuru Hayashi, Atsushi Katsumata, Maki Kaidoh, Yumiko Yokoyama, Toshio Ohhashi
To confirm our previous study that abdominal respiration has induced hemodilution in human subjects, we performed in-vivo experiments involving anesthetized rabbits. Fifteen 6- to 7-month-old male Japanese white rabbits were used in the animal experiments. Anesthesia was maintained with 2.5%-3.0% isoflurane under N2O + 100% O2 inhalation. Ventilation was maintained at 40 mL/breath for 20 breaths/min. Physiological saline solution was administered at rated 18 mL/h during the experiments. First, we attempted to evaluate lymph flow through the thoracic duct using Sonazoid-based contrast-enhanced ultrasound (CEUS)-guided method and then investigated the effects of manual lymph drainage of the chylocyst on the numbers of red blood cells (RBC), hematocrit (Ht) levels, and the blood concentrations of total protein (TP) and hemoglobin (Hb)...
October 26, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/29066902/effects-of-sevoflurane-versus-propofol-on-cerebrovascular-reactivity-to-carbon-dioxide-during-laparoscopic-surgery
#13
Chunyi Wang, Cheng Ni, Gang Li, Yan Li, Liyuan Tao, Nan Li, Jun Wang, Xiangyang Guo
PURPOSE: Cerebrovascular reactivity to carbon dioxide (CVR-CO2) reflects cerebrovascular reserve capacity, which is important in many brain disorders, including cerebrovascular and Alzheimer's diseases. Meanwhile, there is a relationship between CVR-CO2 and cognitive function. Therefore, the study is aimed at investigating the effects of sevoflurane versus propofol on CVR-CO2 during laparoscopic surgery, as well as the role of CVR-CO2 on cognitive function during perioperative period...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29043904/effects-of-anesthesia-with-nitrous-oxide-on-tympanoplasty-outcomes-a-randomized-controlled-trial
#14
Ali Kouhi, Fatemeh Hajimohammadi, Sasan Dabiri, Amin Amali, Neda Enayati, Sahar Manavi, Niloufar Saeedi, Ziba Bidar
OBJECTIVES: To investigate effects of nitrous oxide (N2O), as inhalational anesthetic agent, on tympanoplasty outcomes. METHODS: In this randomized controlled trial, patients were randomized into two groups: 39 patients who received N2O as an inhalant anesthesia and 47 patients who did not receive. All were operated on with standard type of ear surgery. The protocol for the two groups was identical. Before surgery baseline audiometry was performed. Postoperative audiological controls were carried out at 3 months...
October 18, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29042297/trek-1-pathway-mediates-isoflurane-induced-memory-impairment-in-middle-aged-mice
#15
Yanhui Cai, Zhengwu Peng, Haiyun Guo, Feng Wang, Yi Zeng
Post-operative cognitive dysfunction (POCD) has been widely reported, especially in elderly patients. An association between POCD and inhalational anesthetics, such as isoflurane, has been suggested. The TWIK-related K(+) channel-1 (TREK-1) controls several major cellular responses involved in memory formation and is believed to participate in the development of depression, cerebral ischemia and blood-brain barrier dysfunction. However, the specific role of TREK-1 in mediating anesthesia-induced POCD remains unknown...
October 16, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29042237/ligand-partitioning-into-lipid-bilayer-membranes-under-high-pressure-implication-of-variation-in-phase-transition-temperatures
#16
Hitoshi Matsuki, Kentaro Kato, Hirotsugu Okamoto, Shuntaro Yoshida, Masaki Goto, Nobutake Tamai, Shoji Kaneshina
The variation in phase-transition temperatures of dipalmitoylphosphatidylcholine (DPPC) bilayer membrane by adding two membrane-active ligands, a long-chain fatty acid (palmitic acid (PA)) and an inhalation anesthetic (halothane (HAL)), was investigated by light-transmittance measurements and fluorometry. By assuming the thermodynamic colligative property for the bilayer membrane at low ligand concentrations, the partitioning behavior of these ligands into the DPPC bilayer membrane was considered. It was proved from the differential partition coefficients between two phases that PA has strong affinity with the gel (lamellar gel) phase in a micro-molal concentration range and makes the bilayer membrane more ordered, while HAL has strong affinity with the liquid crystalline phase in a milli-molal concentration range and does the bilayer membrane more disordered...
October 16, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29016681/heterodimerization-of-two-pore-domain-k-channel-task1-and-talk2-in-living-heterologous-expression-systems
#17
Yoshiaki Suzuki, Kanako Tsutsumi, Tatsuya Miyamoto, Hisao Yamamura, Yuji Imaizumi
Two-pore-domain K+ (K2P) channels sense a wide variety of stimuli such as mechanical stress, inhalational anesthetics, and changes in extracellular pH or temperature. The K2P channel activity forms a background K+ current and, thereby, contributes to resting membrane potentials. Six subfamilies including fifteen subtypes of K2P channels have been identified. Each K2P channel molecule with two pores consists of a homodimer of each subtype. In addition, a few heterodimers mainly within the same subfamilies have been found recently...
2017: PloS One
https://www.readbyqxmd.com/read/28991117/thermal-a-%C3%AE-nociceptors-identified-by-transcriptomics-express-higher-levels-of-anesthesia-sensitive-receptors-than-thermal-c-fibers-and-are-more-suppressible-by-low-dose-isoflurane
#18
Stephen J Raithel, Matthew R Sapio, Michael J Iadarola, Andrew J Mannes
We investigated the effect of isoflurane on 2 main types of thermal nociceptors: A-δ and C-fibers. Surprisingly, 1% inhaled isoflurane led to a hyperalgesic response to C-fiber thermal stimulation, whereas responses to A-δ thermal stimulation were blunted. We explored the hypothesis that differences in withdrawal behavior are mediated by differential expression of isoflurane-sensitive proteins between these types of thermal nociceptors. Multiple transcriptomic databases of peripheral neurons were integrated to reveal that isoflurane-susceptible proteins Htr3a, Kcna2, and Scn8a were enriched in thermosensitive A-δ neurons...
October 4, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28979702/chikusetsu-saponin-iva-attenuates-isoflurane-induced-neurotoxicity-and-cognitive-deficits-via-sirt1-erk1-2-in-developmental-rats
#19
Xi Fang, Qiang Han, Shiyong Li, Yilin Zhao, Ailin Luo
Inhalation anesthetics isoflurane may increase the risk of neurotoxicity and cognitive deficiency at postnatal and childhood. Chikusetsu saponin IVa (chIV) is a plant extract compound, which could possessed extensive pharmacological actions of central nervous system, cardia-cerebrovascular system, immunologic system and treatment and prevention of tumor. In our study, we investigated the neuroprotective effect of chIV on isoflurane-induced hippocampal neurotoxicity and cognitive function impairment in neonatal rats...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28973329/the-ability-of-nitric-oxide-to-lower-intraocular-pressure-is-dependent-on-guanylyl-cyclase
#20
Stefan Muenster, Wolfgang S Lieb, Gregor Fabry, Kaitlin N Allen, Shivani S Kamat, Ann H Guy, Ana C Dordea, Leandro Teixeira, Robert E Tainsh, Binglan Yu, Wei Zhu, Nicole E Ashpole, Rajeev Malhotra, Peter Brouckaert, Donald B Bloch, Marielle Scherrer-Crosbie, W Daniel Stamer, Markus H Kuehn, Louis R Pasquale, Emmanuel S Buys
Purpose: While nitric oxide (NO) donors are emerging as treatments for glaucoma, the mechanism by which NO lowers intraocular pressure (IOP) is unclear. NO activates the enzyme guanylyl cyclase (GC) to produce cyclic guanosine monophosphate. We studied the ocular effects of inhaled and topically applied NO gas in mice and lambs, respectively. Methods: IOP and aqueous humor (AqH) outflow were measured in WT and GC-1α subunit null (GC-1-/-) mice. Mice breathed 40 parts per million (ppm) NO in O2 or control gas (N2/O2)...
September 1, 2017: Investigative Ophthalmology & Visual Science
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