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Anaesthesia

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https://www.readbyqxmd.com/read/28337769/accuracy-intra-and-inter-rater-reliability-of-three-scoring-systems-for-the-glottic-view-at-videolaryngoscopy
#1
E J O'Loughlin, A D Swann, J D English, R Ramadas
An accurate and reproducible recording of laryngoscopic view at tracheal intubation is an important aspect of anaesthetic practice. Unlike direct laryngoscopy, in which the view achieved by the line of sight directly relates to the ease of intubating the trachea, videolaryngoscopy can create a situation in which the view is good, but intubation difficult or impossible. Communicating this to a subsequent anaesthetist is important. We compared three scoring systems: Cormack and Lehane; POGO (percentage of glottic opening); and the Fremantle score, as used by 74 critical care doctors rating 30 anonymised videos of videolaryngoscopic intubations...
March 24, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28332186/a-pilot-study-of-ultrasound-evaluation-of-gastric-emptying-in-patients-with-end-stage-renal-failure-a-comparison-with-healthy-controls
#2
C Chen, L Liu, C Y Wang, S-W Choi, V M Yuen
This prospective study was designed to evaluate gastric volume and content in patients with renal failure and healthy controls after an overnight fast, immediately after a light meal and at 6 h after the meal. Thirty subjects in each group were recruited. At each scanning session, gastric antral cross-sectional area was measured in the supine recumbent and right lateral decubitus positions, and a qualitative assessment of gastric contents was made using the Perlas three-point grading system. Six hours after the meal, the mean (SD) antral cross-sectional area in the supine position was 471 (195) mm(2) in patients with renal failure and 319 (106) mm(2) in healthy controls (p = 0...
March 23, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28326548/comparing-two-methods-agreeing-to-disagree
#3
S W Choi, D M H Lam
No abstract text is available yet for this article.
March 21, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28321836/intra-oral-ignition-of-monopolar-diathermy-during-transnasal-humidified-rapid-insufflation-ventilatory-exchange-thrive
#4
D Onwochei, K El-Boghdadly, R Oakley, I Ahmad
We present the case of unanticipated airway ignition during hard palate biopsy. Transnasal humidified rapid-insufflation ventilatory exchange (THRIVE) and monopolar diathermy were utilised for the procedure, during which an arc arose from the diathermy tip to a titanium implant, causing a brief ignition on the monopolar diathermy grip. This case highlights the need for maintained awareness of fire risk when using diathermy in the presence of THRIVE during airway surgery.
March 20, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28317096/the-use-of-enrichment-to-reduce-statistically-indeterminate-or-negative-trials-in-critical-care
#5
EDITORIAL
M Shankar-Hari, G D Rubenfeld
No abstract text is available yet for this article.
March 20, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28317094/long-term-outcomes-and-cost-effectiveness-of-high-dose-dexamethasone-for-cardiac-surgery-a-randomised-trial
#6
J M Dieleman, G A de Wit, A P Nierich, P M Rosseel, J M van der Maaten, J Hofland, J C Diephuis, F de Lange, C Boer, R E Neslo, K G Moons, L A van Herwerden, J G Tijssen, C J Kalkman, D van Dijk
Prophylactic intra-operative administration of dexamethasone may improve short-term clinical outcomes in cardiac surgical patients. The purpose of this study was to evaluate long-term clinical outcomes and cost effectiveness of dexamethasone versus placebo. Patients included in the multicentre, randomised, double-blind, placebo-controlled DExamethasone for Cardiac Surgery (DECS) trial were followed up for 12 months after their cardiac surgical procedure. In the DECS trial, patients received a single intra-operative dose of dexamethasone 1 mg...
March 20, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28295147/a-prospective-randomised-trial-of-pre-oxygenation-strategies-available-in-the-pre-hospital-environment
#7
C J Groombridge, E Ley, M Miller, T Konig
Pre-oxygenation before tracheal intubation aims to increase safe apnoea duration by denitrogenation of the functional residual capacity of the lungs, and increasing oxygen stores at the onset of apnoea. Pre-oxygenation options in the pre-hospital environment are limited due to oxygen availability and equipment portability. The aim of this study was to evaluate the effectiveness of strategies available in this setting. This was a prospective, randomised, crossover study of 30 healthy volunteers who underwent 3-min periods of pre-oxygenation by tidal volume breathing with a non-rebreather mask, a bag-valve-mask and a portable ventilator...
March 14, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28294285/evaluation-of-a-flexible-bronchoscope-prototype-designed-for-bronchoscopy-during-mechanical-ventilation-a-proof-of-concept-study
#8
M-A Nay, A Auvet, J Mankikian, V Herve, P-F Dequin, A Guillon
Bronchoscopy during mechanical ventilation of patients' lungs significantly affects ventilation because of partial obstruction of the tracheal tube, and may thus be omitted in the most severely ill patients. It has not previously been possible to reduce the external diameter of the bronchoscope without reducing the diameter of the suction channel, thus reducing the suctioning capacity of the device. We believed that a better-designed bronchoscope could improve the safety of bronchoscopy in patients whose lungs were ventilated...
March 14, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28272748/sevoflurane-induced-isoelectric-eeg-and-burst-suppression-differential-and-antagonistic-effect-of-added-nitrous-oxide
#9
B Niu, J Y Xiao, Y Fang, B Y Zhou, J Li, F Cao, Y K Tian, W Mei
The objective of this study was to investigate whether nitrous oxide influenced the ED50 of sevoflurane for induction of isoelectric electroencephalogram (ED50isoelectric ) differently from its influence on the ED50 of sevoflurane for electroencephalogram burst suppression (ED50burst ). In a prospective, randomised, double-blind, parallel group, up-down sequential allocation study, 77 ASA physical status 1 and 2 patients received sevoflurane induction and, after tracheal intubation, were randomly allocated to receive sevoflurane with either 40% oxygen in air (control group) or 60% nitrous oxide in oxygen mixture (nitrous group)...
March 8, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28272745/when-anaesthetics-collide-antagonism-of-one-agent-by-another
#10
EDITORIAL
J J Pandit
No abstract text is available yet for this article.
March 8, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28255987/a-randomised-double-blind-trial-of-phenylephrine-and-metaraminol-infusions-for-prevention-of-hypotension-during-spinal-and-combined-spinal-epidural-anaesthesia-for-elective-caesarean-section
#11
N J McDonnell, M J Paech, N A Muchatuta, S Hillyard, E A Nathan
Prophylactic vasopressor administration is commonly recommended to reduce maternal hypotension during spinal anaesthesia for caesarean section. Metaraminol has undergone limited investigation in obstetric anaesthesia for this purpose, particularly in comparison with phenylephrine. In this multicentre, randomised, double-blind, non-inferiority study, we compared prophylactic phenylephrine or metaraminol infusions, started immediately after spinal anaesthesia, in 185 women who underwent elective caesarean section...
March 3, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28251618/a-randomised-crossover-simulation-study-comparing-the-impact-of-chemical-biological-radiological-or-nuclear-substance-personal-protection-equipment-on-the-performance-of-advanced-life-support-interventions
#12
J Schumacher, J Arlidge, F Garnham, I Ahmad
Recent incidents involving chemical, biological, radiological and nuclear substances have stressed the importance of sufficient personal protection equipment for medical first-responders. Modern lightweight, battery-independent, suit ensembles may prove superior to the current protective suit used in the UK. This study compared the powered respiratory protective suit (PRPS ensemble) with a lightweight suit consisting of a SARATOGA(®) Multipurpose CBRN Protective Coverall Polyprotect 12 in conjunction with the Avon C50 Respirator/Avon CBRNF12CE filter canister and butyl rubber protective gloves (Polyprotect 12 ensemble)...
March 2, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28251614/flow-characteristics-of-luer-and-non-luer-spinal-needles
#13
R S Monteiro, A Pillai, S W Choi, D Bogod, S M Yentis
We investigated the flow rates of 25-G and 27-G spinal needles, of 90-mm and 120-mm lengths, from Vygon, BD, B. Braun and Pajunk; the needles had either a Luer connector, or a Surety(®) or UniVia(®) non-Luer connector. We used a bench-top model of entering the spinal space, pressurised to 35 cmH2 O to simulate cerebrospinal fluid pressure in the sitting position. We examined the time to first appearance of simulated cerebrospinal fluid in the needle hub, as well as the amount of fluid collected over 120 s after the needle was introduced...
March 2, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28251606/a-randomised-trial-of-peri-operative-positive-airway-pressure-for-postoperative-delirium-in-patients-at-risk-for-obstructive-sleep-apnoea-after-regional-anaesthesia-with-sedation-or-general-anaesthesia-for-joint-arthroplasty
#14
J W Nadler, J L Evans, E Fang, X A Preud'Homme, R L Daughtry, J B Chapman, M P Bolognesi, D E Attarian, S S Wellman, A D Krystal
Previous pilot work has established an association between obstructive sleep apnoea and the development of acute postoperative delirium , but it remains unclear to what extent this risk factor is modifiable in the 'real world' peri-operative setting. In a single-blind randomised controlled trial, 135 elderly surgical patients at risk for obstructive sleep apnoea were randomly assigned to receive peri-operative continuous positive airway pressure (CPAP) or routine care. Of the 114 patients who completed the study, 21 (18...
March 2, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28236300/the-accuracy-of-timed-maximum-local-anaesthetic-dose-calculations-with-an-electronic-calculator-nomogram-and-pen-and-paper
#15
J D Walker, N Williams, D J Williams
Forty anaesthetists calculated maximum permissible doses of eight local anaesthetic formulations for simulated patients three times with three methods: an electronic calculator; nomogram; and pen and paper. Correct dose calculations with the nomogram (85/120) were more frequent than with the calculator (71/120) or pen and paper (57/120), Bayes Factor 4 and 287, p = 0.01 and p = 0.0003, respectively. The rates of calculations at least 120% the recommended dose with each method were different, Bayes Factor 7...
February 24, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28213888/transfusion-in-critical-care-a-uk-regional-audit-of-current-practice
#16
J O M Plumb, M G Taylor, E Clissold, M P W Grocott, R Gill
A consistent message within critical care publications has been that a restrictive transfusion strategy is non-inferior, and possibly superior, to a liberal strategy for stable, non-bleeding critically ill patients. Translation into clinical practice has, however, been slow. Here, we describe the degree of adherence to UK best practice guidelines in a regional network of nine intensive care units within Wessex. All transfusions given during a 2-month period were included (n = 444). Those given for active bleeding or within 24 h of major surgery, trauma or gastrointestinal bleeding were excluded (n = 148)...
February 18, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28205226/an-investigation-into-the-effects-of-real-vs-stimulated-cases-and-level-of-experience-on-the-distribution-of-visual-attention-during-induction-of-general-anaesthesia
#17
T Grundgeiger, C Klöffel, S Mohme, T Wurmb, O Happel
In anaesthesia, patient simulators have been used for training and research. However, insights from simulator-based research may only translate to real settings if the simulation elicits the same behaviour as the real setting. To this end, we investigated the effects of the case (simulated case vs. real case) and experience level (junior vs. senior) on the distribution of visual attention during the induction of general anaesthesia. We recorded eye-tracking data from 12 junior and 12 senior anaesthetists inducing general anaesthesia in a simulation room and in an actual operating room (48 recordings)...
February 16, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28205213/haemodynamic-changes-to-a-midazolam-fentanyl-rocuronium-protocol-for-pre-hospital-anaesthesia-following-return-of-spontaneous-circulation-after-cardiac-arrest
#18
M Miller, C Groombridge, R Lyon
Following the return of spontaneous circulation after out-of-hospital cardiac arrest, neurological dysfunction, airway or ventilatory compromise can impede transport to early percutaneous coronary intervention, necessitating pre-hospital or emergency department anaesthesia to facilitate this procedure. There are no published reports of the ideal induction agents in these patients. We sought to describe haemodynamic changes associated with induction of anaesthesia using a midazolam (0.1 mg.kg(-1) ), fentanyl (2 μg...
February 15, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28177116/effects-of-acute-controlled-changes-in-end-tidal-carbon-dioxide-on-the-diameter-of-the-optic-nerve-sheath-a-transorbital-ultrasonographic-study-in-healthy-volunteers
#19
M Dinsmore, J S Han, J A Fisher, V W S Chan, L Venkatraghavan
Transorbital ultrasonographic measurement of the diameter of the optic nerve sheath is a non-invasive, bed-side examination for detecting raised intracranial pressure. However, the ability of the optic nerve sheath diameter to predict acute changes in intracranial pressures remains unknown. The aim of this study was to examine the dynamic changes of the optic nerve sheath diameter in response to mild fluctuations in cerebral blood volume induced by changes in end-tidal carbon dioxide. We studied 11 healthy volunteers...
February 8, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28133720/heart-rate-variability-as-a-predictor-of-hypotension-following-spinal-for-elective-caesarean-section-a-prospective-observational-study
#20
D G Bishop, C Cairns, M Grobbelaar, R N Rodseth
Post-spinal hypotension remains a common and clinically-important problem during caesarean section, and accurate pre-operative prediction of this complication might enhance clinical management. We conducted a prospective, single-centre, observational study of heart rate variability in 102 patients undergoing elective caesarean section in a South African regional hospital. We performed Holter recording for ≥ 5 min in the hour preceding spinal anaesthesia. The low-frequency/high-frequency ratio component of heart rate variability was compared, using a logistic regression model, with baseline heart rate and body mass index (BMI) as a predictor of hypotension (defined as systolic arterial pressure < 90 mmHg) occurring from the time of spinal insertion until 15 min after delivery of the baby...
January 30, 2017: Anaesthesia
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