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https://www.readbyqxmd.com/read/28915967/the-concept-of-protective-nerve-stimulation-for-ultrasound-guided-nerve-blocks
#1
Martin Ertmer, Edda Klotz, Jürgen Birnbaum
Regional plexus and nerve blocks are a common technique in modern anesthesia. Since ultrasound machines are available in many departments, the role of nerve stimulation is highly discussed and different approaches to perform the blocks are taken into account. Common technique for electrical nerve stimulation is searching for a stimulating threshold of 0.4-0.5mA using an impulse width of 0.1ms. We present our hypothesis of using all possible information with a new concept of protective nerve stimulation together with first data supporting our theory...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28883203/machine-learning-models-of-post-intubation-hypoxia-during-general-anesthesia
#2
Philipp Sippl, Thomas Ganslandt, Hans-Ulrich Prokosch, Tino Muenster, Dennis Toddenroth
Fine-meshed perioperative measurements are offering enormous potential for automatically investigating clinical complications during general anesthesia. In this study, we employed multiple machine learning methods to model perioperative hypoxia and compare their respective capabilities. After exporting and visualizing 620 series of perioperative vital signs, we had ten anesthesiologists annotate the subjective presence and severity of temporary post-intubation oxygen desaturation. We then applied specific clustering and prediction methods on the acquired annotations, and evaluated their performance in comparison to the inter-rater agreement between experts...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28840160/investigation-of-data-driven-optical-neuromonitoring-approach-during-general-anesthesia-with-sevoflurane
#3
Gabriela Hernandez-Meza, Meltem Izzetoglu, Ahmet Sacan, Michael Green, Kurtulus Izzetoglu
Anesthesia monitoring currently needs a reliable method to evaluate the effects of the anesthetics on its primary target, the brain. This study focuses on investigating the clinical usability of a functional near-infrared spectroscopy (fNIRS)-derived machine learning classifier to perform automated and real-time classification of maintenance and emergence states during sevoflurane anesthesia. For 19 surgical procedures, we examine the entire continuum of the maintenance-transition-emergence phases and evaluate the predictive capability of a support vector machine (SVM) classifier during these phases...
October 2017: Neurophotonics
https://www.readbyqxmd.com/read/28836107/neural-network-classifier-for-automatic-detection-of-invasive-versus-noninvasive-airway-management-technique-based-on-respiratory-monitoring-parameters-in-a-pediatric-anesthesia
#4
Jorge A Gálvez, Ali Jalali, Luis Ahumada, Allan F Simpao, Mohamed A Rehman
Children undergoing general anesthesia require airway monitoring by an anesthesia provider. The airway may be supported with noninvasive devices such as face mask or invasive devices such as a laryngeal mask airway or an endotracheal tube. The physiologic data stored provides an opportunity to apply machine learning algorithms distinguish between these modes based on pattern recognition. We retrieved three data sets from patients receiving general anesthesia in 2015 with either mask, laryngeal mask airway or endotracheal tube...
August 23, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28832896/end-tidal-control-vs-manually-controlled-minimal-flow-anesthesia-a-prospective-comparative-trial
#5
A J Wetz, M M Mueller, K Walliser, C Foest, S Wand, I F Brandes, R M Waeschle, M Bauer
BACKGROUND: To ensure safe general anesthesia, manually controlled anesthesia requires constant monitoring and numerous manual adjustments of the gas dosage, especially for low- and minimal-flow anesthesia. Oxygen flow-rate and administration of volatile anesthetics can also be controlled automatically by anesthesia machines using the end-tidal control technique, which ensures constant end-tidal concentrations of oxygen and anesthetic gas via feedback and continuous adjustment mechanisms...
August 22, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28809679/automatic-localization-of-the-needle-target-for-ultrasound-guided-epidural-injections
#6
Mehran Pesteie, Victoria Lessoway, Purang Abolmaesumi, Robert N Rohling
Accurate identification of the needle target is crucial for effective epidural anesthesia. Currently, epidural needle placement is administered by a manual technique, relying on the sense of feel, which has a significant failure rate. Moreover, misleading the needle may lead to inadequate anesthesia, post dural puncture headaches and other potential complications. Ultrasound offers guidance to the physician for identification of the needle target, but accurate interpretation and localization remain challenges...
August 11, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28752483/testing-of-anesthesia-machines-and-defibrillators-in-healthcare-institutions
#7
Lejla Gurbeta, Zijad Dzemic, Tamer Bego, Ervin Sejdic, Almir Badnjevic
To improve the quality of patient treatment by improving the functionality of medical devices in healthcare institutions. To present the results of the safety and performance inspection of patient-relevant output parameters of anesthesia machines and defibrillators defined by legal metrology. This study covered 130 anesthesia machines and 161 defibrillators used in public and private healthcare institutions, during a period of two years. Testing procedures were carried out according to international standards and legal metrology legislative procedures in Bosnia and Herzegovina...
September 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28751133/effect-of-cleaning-status-on-accuracy-and-precision-of-oxygen-flowmeters-of-various-ages
#8
Stephanie Fissekis, David S Hodgson, Nora M Bello
OBJECTIVE: To evaluate oxygen flowmeters for accuracy and precision, assess the effects of cleaning and assess conformity to the American Society for Testing Materials (ASTM) standards. STUDY DESIGN: Experimental study. METHODS: The flow of oxygen flowmeters from 31 anesthesia machines aged 1-45 years was measured before and after cleaning using a volumetric flow analyzer set at 0.5, 1.0, 2.0, 3.0, and 4.0 L minute(-1). A general linear mixed models approach was used to assess flow accuracy and precision...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28743341/-effect-of-external-abdominal-aorta-compression-on-circulation-during-anesthesia-induction-in-elderly-patients
#9
Xiuman Li, Lixiang Wang
OBJECTIVE: To investigate the effect of external abdominal aorta compression on circulation during anesthetic induction in elderly patients. METHODS: A prospective randomized controlled trial was conducted. Patients with age of 60-75 years old, requiring a general anesthesia for non-abdominal surgery, and with II-III class of American Society of Anesthesiologists (ASA) physical status classification, and admitted to General Hospital of Chinese People's Armed Police Forces from January to April in 2017 were enrolled...
July 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28681208/surgical-considerations-in-the-optimal-management-of-patients-with-malignant-brain-tumors
#10
REVIEW
Jaclyn J Renfrow, Roy E Strowd, Adrian W Laxton, Stephen B Tatter, Carol P Geer, Glenn J Lesser
Advances in technology are revolutionizing medicine and the limits of what we can offer to our patients. In neurosurgery, technology continues to reduce morbidity, increase surgical accuracy, facilitate tissue acquisition, and promote novel techniques for prolonging survival in patients with neuro-oncologic disease. Surgery has been the backbone of glioma diagnosis and treatment by providing adequate, high quality material for precise histologic diagnosis, and genomic characterization in the setting of significant intratumoral heterogeneity, thus allowing personalized treatment selection in the clinic...
August 2017: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/28658163/effects-of-preconditioning-of-electro-acupuncture-on-postoperative-cognitive-dysfunction-in-elderly-a-prospective-randomized-controlled-trial
#11
RANDOMIZED CONTROLLED TRIAL
Qi Zhang, Ya-Nan Li, Yang-Yang Guo, Chun-Ping Yin, Fang Gao, Xi Xin, Shu-Ping Huo, Xiu-Li Wang, Qiu-Jun Wang
Electro-acupuncture is a burgeoning treatment using the needle inserting into the body acupoints and the low-frequency pulse current being electrified by an electric acupuncture machine. This study was designed to evaluate the effects of preconditioning of electro-acupuncture on postoperative cognitive dysfunction in elderly.Ninety patients scheduled spine surgery were randomly assigned into 2 groups using a random number table: control group (group C) and electro-acupuncture group (group EA). In group EA, electro-acupuncture was applied on Baihui, Dazhui, and Zusanli acupoints 30 minutes before anesthesia...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28640124/comparison-of-the-temperature-and-humidity-in-the-anesthetic-breathing-circuit-among-different-anesthetic-workstations-updated-guidelines-for-reporting-parallel-group-randomized-trials
#12
RANDOMIZED CONTROLLED TRIAL
Yoon Ji Choi, Sam Hong Min, Jeong Jun Park, Jang Eun Cho, Seung Zhoo Yoon, Suk Min Yoon
BACKGROUND: For patients undergoing general anesthesia, adequate warming and humidification of the inspired gases is very important. The aim of this study was to evaluate the differences in the heat and moisture content of the inspired gases with low-flow anesthesia using 4 different anesthesia machines. METHODS: The patients were divided into 11 groups according to the anesthesia machine used (Ohmeda, Excel; Avance; Dräger, Cato; and Primus) and the fresh gas flow (FGF) rate (0...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28632533/investigation-of-two-prototypes-of-novel-noncontact-technologies-for-automated-real-time-capture-of-incremental-drug-administration-data-from-syringes
#13
Benjamin Eagle, David J Williams, John Dingley
BACKGROUND: An ideal electronic anesthesia recording system would be capable of not only recording physiological data but also injectable drug doses given, including those given incrementally from one syringe, without recourse to manual data entry. We compared 2 prototype devices which wirelessly recognized individual syringes and measured changes in their plunger positions via 2 different optical noncontact means, allowing calculation of incremental drug doses given. METHODS: Both devices incorporated a radio-frequency identification reader, which wirelessly read a unique code from a radio-frequency identification tag within syringe drug labels...
August 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28623500/contribution-of-the-nasal-passage-to-face-mask-ventilation-a-prospective-blinded-randomized-crossover-trial
#14
Tomoki Yamasaki, Nobuyasu Komasawa, Haruki Kido, Toshiaki Minami
BACKGROUND: Previous studies have shown that the nasal passage plays an important role in manual face mask ventilation, but this has yet to be quantitatively assessed. We conducted a prospective randomized crossover clinical trial to compare the change in pressure-controlled face mask tidal volume with and without nasal airway occlusion. METHOD: Female patients undergoing elective surgery under general anesthesia served as study subjects. Patients were randomly assigned to face mask ventilation beginning either with or without nasal passage occlusion (achieved with a swimmer's nose clip), followed by removal or application of the nose clip, respectively...
June 16, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28612677/an-unusual-complication-with-the-administration-of-a-volatile-anesthetic-agent-for-status-asthmaticus-in-the-pediatric-intensive-care-unit-case-report-and-review-of-the-literature
#15
Brittany Shutes, W Joshua Frazier, Joseph D Tobias
In severe cases of status asthmaticus, when conventional therapies fail, volatile anesthetic agents remain a therapeutic option. When delivered outside of the operating room setting, specialized delivery techniques are needed to ensure the safe and effective use of volatile anesthetic agents. We present a 16-year-old adolescent with status asthmaticus who required the therapeutic administration of the volatile anesthetic agent, sevoflurane, in the pediatric intensive care unit (PICU). Although initially effective in reducing bronchospasm, progressive hypercarbia developed due to defective functioning of the carbon dioxide absorber of the anesthesia machine...
July 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28597847/mapping-the-fine-structure-of-cortical-activity-with-different-micro-ecog-electrode-array-geometries
#16
Xi Wang, C Alexis Gkogkidis, Olga Iljina, Lukas D J Fiederer, Christian Henle, Irina Mader, Jan Kaminsky, Thomas Stieglitz, Mortimer Gierthmuehlen, Tonio Ball
OBJECTIVE: Innovations in micro-electrocorticography (µECoG) electrode array manufacturing now allow for intricate designs with smaller contact diameters and/or pitch (i.e. inter-contact distance) down to the sub-mm range. The aims of the present study were: (i) to investigate whether frequency ranges up to 400 Hz can be reproducibly observed in µECoG recordings and (ii) to examine how differences in topographical substructure between these frequency bands and electrode array geometries can be quantified...
June 9, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28592064/-clinical-analysis-on-monitoring-and-comprehensive-treatment-after-carotid-endarterectomy
#17
X Y Wang, Z H Sun, L Liu, C Wu, Z Ji
Objective: To discuss the therapeutic effect of management of carotid endarterectomy in care unit. Methods: A total of 315 patients with carotid atherosclerotic stenosis were enrolled. All of the patients were taken into care unit under tracheal intubation anesthesia after carotid endarterectomy. Then the patients were managed with a breathing machine, continuous sedation, strict monitoring of hemodynamics and pupil change, strict control of heart rate and blood pressure, atomization inhalation therapy, treatment of anticoagulation and antiplatelet therapy and classification management of airway...
May 30, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28526944/ventilator-data-extraction-with-a-video-display-image-capture-and-processing-system
#18
David B Wax, Bryan Hill, Matthew A Levin
Medical hardware and software device interoperability standards are not uniform. The result of this lack of standardization is that information available on clinical devices may not be readily or freely available for import into other systems for research, decision support, or other purposes. We developed a novel system to import discrete data from an anesthesia machine ventilator by capturing images of the graphical display screen and using image processing to extract the data with off-the-shelf hardware and open-source software...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28504341/breathing-circuit-compliance-and-accuracy-of-displayed-tidal-volume-during-pressure-controlled-ventilation-of-infants-a-quality-improvement-project
#19
Todd A Glenski, Carrie Diehl, Rachel G Clopton, Robert H Friesen
INTRODUCTION: Anesthesia machines have evolved to deliver desired tidal volumes more accurately by measuring breathing circuit compliance during a preuse self-test and then incorporating the compliance value when calculating expired tidal volume. The initial compliance value is utilized in tidal volume calculation regardless of whether the actual compliance of the breathing circuit changes during a case, as happens when corrugated circuit tubing is manually expanded after the preuse self-test but before patient use...
September 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28495814/automated-control-of-mechanical-ventilation-during-general-anaesthesia-study-protocol-of-a-bicentric-observational-study-avas
#20
Dirk Schädler, Georg Miestinger, Tobias Becher, Inéz Frerichs, Norbert Weiler, Christoph Hörmann
INTRODUCTION: Automated control of mechanical ventilation during general anaesthesia is not common. A novel system for automated control of most of the ventilator settings was designed and is available on an anaesthesia machine. METHODS AND ANALYSIS: The 'Automated control of mechanical ventilation during general anesthesia study' (AVAS) is an international investigator-initiated bicentric observational study designed to examine safety and efficacy of the system during general anaesthesia...
May 10, 2017: BMJ Open
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