Abstract:
BACKGROUND:The relationship between end-tidal sevoflurane concentration, bispectral index (BIS) and the EEG bispectrum in children appears to be age dependent. The aim of this study was to quantify the BIS values at 1 MAC (minimum alveolar concentration) for desflurane and halothane, and explore the relationship with age for these anaesthetic agents in children. METHODS:ECG, EEG and BIS were recorded continuously in 90 children aged 6-170 months requiring anaesthesia for elective surgery. Fifty children were anaesthetized with desflurane, and 40 children with halothane. Recordings were performed through to a steady state of 2 MAC, and thereafter at 1 and 0.5 MAC, respectively. The bispectrum of the EEG was estimated using MATLAB(c) software. A multiple correspondence analysis (MCA) was used. RESULTS:At a steady state of 1 MAC, BIS values were significantly higher with halothane 62 (43-80) than desflurane 34 (18-64). BIS values were significantly correlated with age in both groups: DES (r(2)=0.57; P<0.01) and HALO (r(2)=0.48; P<0.01). Changes in position in the structured model of the MCA (dependent on the pattern of the EEG bispectrum) were different for the two volatile anaesthetic agents. CONCLUSIONS:In children, BIS values are linked to age irrespective of the volatile anaesthetic agent used. The difference in BIS values for different agents at the same MAC can be explained by the specific effect on the EEG bispectrum induced by each anaesthetic agent, bringing into question the ability of the EEG bispectrum to accurately determine the depth of anaesthesia.
journal_name
Br J Anaesthjournal_title
British journal of anaesthesiaauthors
Tirel O,Wodey E,Harris R,Bansard JY,Ecoffey C,Senhadji Ldoi
10.1093/bja/ael034subject
Has Abstractpub_date
2006-04-01 00:00:00pages
480-5issue
4eissn
0007-0912issn
1471-6771pii
S0007-0912(17)35155-3journal_volume
96pub_type
杂志文章abstract::Puerperal women are reported to have a rate of cerebral infarction 13 times greater than non-pregnant females. We report a case of cerebral ischaemia in a 30-yr-old healthy parturient after epidural analgesia for labour, complicated by dural puncture treated with two epidural blood patches. Investigations showed the d...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:Anterograde, but not retrograde, amnesia has been demonstrated following midazolam administration. However, there have been no studies investigating whether or not immediate retrograde amnesia can be produced with midazolam. METHODS:After ethics committee approval and consent, 40 adult patients undergoing s...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/aei040
更新日期:2005-03-01 00:00:00
abstract:BACKGROUND:Assessments of labour pain focus on pain intensity, not on duration. We aimed to assess the importance labouring women apply to pain intensity and duration before labour and post-delivery. METHODS:Forty healthy women scheduled for labour induction were enrolled in this institutional review board-approved, p...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aeu149
更新日期:2014-09-01 00:00:00
abstract::Prolongation of the QT interval of the ECG represents an imbalance in cardiac autonomic function and may predict cardiac arrhythmia. Vagal activity protects against prolongation of the QT interval which may be associated with flattening of the T-wave of the ECG. The changes in QT interval, T-wave amplitude and respira...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/71.5.736
更新日期:1993-11-01 00:00:00
abstract::A combination of exogenous surfactant and partial liquid ventilation (PLV) with perfluorocarbons should enhance gas exchange, improve respiratory mechanics and reduce tissue damage of the lung in acute lung injury (ALI). We used a small dose of exogenous surfactant with and without PLV in an experimental model of ALI ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/87.4.593
更新日期:2001-10-01 00:00:00
abstract::In clinical use, the concentrations of local anaesthetics at the site of action are unknown. With the method described here, concentrations of local anaesthetics can be predetermined and kept constant at the site of action. In six volunteers, a blister was raised on the ventral surface of the forearm. After removal of...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/70.5.552
更新日期:1993-05-01 00:00:00
abstract:BACKGROUND:The significance of IgE antibodies to neuromuscular blocking agent (NMBA)-induced anaphylactic reactions during anaesthesia is unclear. We investigated the relevance of IgE to rocuronium using an in vitro technique. METHODS:Serum samples from 61 patients with anaphylactic reactions during anaesthesia were i...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aer028
更新日期:2011-05-01 00:00:00
abstract:BACKGROUND:The objective of this study was to develop a pharmacokinetic (PK) model to characterize the influence of obesity on propofol PK parameters. METHODS:Nineteen obese ASA II patients undergoing bariatric surgery were studied. Patients received propofol 2 mg kg(-1) bolus dose followed by a 5-20-40-120 min, 10-8-...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aeq195
更新日期:2010-10-01 00:00:00
abstract:BACKGROUND:Psychological factors are thought to drive inter-patient variations in anaesthetic and analgesic requirements. This cross-sectional study investigated whether preoperative psychological factors can predict anaesthetic requirements and postoperative pain. METHODS:Before total thyroidectomy, 100 consecutive w...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aer305
更新日期:2012-01-01 00:00:00
abstract::Arterial PO2 (PaO2) has been related to inspired oxygen concentration (FIO2 range 0.21-0.60) in 20 patients, breathing spontaneously, while recovering from a range of conditions treated in an intensive therapy unit. There was a highly significant linear trend (P < 0.001) for the mean venous admixture ("virtual shunt")...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/72.5.515
更新日期:1994-05-01 00:00:00
abstract::Following antagonism of tubocurarine block with a mixture of atropine 20 microgram/kg and neostigmine 50 microgram/kg in 20 children, heart rate decreased from a control value of 110.4 beat/min to 90.1 at 5 min and 89.2 at 6 min (P less than 0.02). Stroke volume index did not change during the first 5 min from a contr...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/49.9.901
更新日期:1977-09-01 00:00:00
abstract::The effects of different premedication (i.m. and i.v.) on the usefulness of midazolam or thiopentone as induction agents for minor surgery was studied in 194 women undergoing either dilatation and curettage or explorative fractionate curettage. Midazolam appeared to produce light sedation which required powerful preme...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/54.5.507
更新日期:1982-05-01 00:00:00
abstract:BACKGROUND:Circadian rhythms coordinate almost all physiological functions and are implicated in major disease development. Even though circadian rhythms have a major impact on human health, little is known about how they affect general anaesthesia. The purpose of this study was to understand if the time of day affects...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2018.06.027
更新日期:2018-10-01 00:00:00
abstract::Some recipients of isolated, orthotopic lung transplants have now survived to leave hospital with greatly improved quality of life. Inevitably, the successful demonstration of the feasibility of these operations means that transplant centres throughout the world may wish to participate in a lung transplant programme. ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,评审
doi:10.1093/bja/61.4.468
更新日期:1988-10-01 00:00:00
abstract::Alveolar type II (ATII) cells perform many important functions within the lung, including surfactant metabolism. We have investigated the effects of isoflurane and different i.v. anaesthetics on cell metabolism in primary cultures of rat ATII cells. Biosynthesis of phosphatidylcholine, the main phospholipid component ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/82.5.767
更新日期:1999-05-01 00:00:00
abstract::In vitro experiments on the rat phrenic nerve-hemidiaphragm preparation, stimulated directly or indirectly with supramaximal impulses at 0.1 Hz revealed that pethidine in concentrations greater than 5 micrograms ml-1 caused a rapid increase of the twitch. This was maximal (60% increase during direct and 70% increase d...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/56.2.195
更新日期:1984-02-01 00:00:00
abstract::The pressor and catecholamine responses to laryngoscopy and intubation were studied in nine patients with pregnancy-induced hypertension (PIH) and in eight normotensive controls. Five of the PIH patients had received oral labetalol as antihypertensive therapy. Mean arterial pressure (MAP) increased significantly from ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/63.4.429
更新日期:1989-10-01 00:00:00
abstract:BACKGROUND:Data on bupivacaine concentrations in the cerebral spinal fluid (CSF) during spinal anaesthesia are scarce. The purpose of this study was to determine the concentration of bupivacaine in the lumbar CSF of patients with an adequate level of spinal anaesthesia after injection of plain bupivacaine 0.5%. METHOD...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aep049
更新日期:2009-06-01 00:00:00
abstract::Since the preoperative administration of water might promote gastric emptying and dilute the remaining gastric contents, 50 patients were investigated before elective surgery. One group was given water 100 ml 2 h before operation; the other group was fasted as usual. Volume and pH of gastric contents were measured imm...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/60.7.803
更新日期:1988-06-01 00:00:00
abstract::The analgesic effect of subanaesthetic concentrations of ether, trichloroethylene, methoxyflurane and halothane has been investigated previously using either clinical assessment or pain threshold measurements, but with conflicting results. The purpose of the present study was to evaluate the analgesic effect of isoflu...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/75.1.55
更新日期:1995-07-01 00:00:00
abstract:Background:Cognitive aids improve the technical performance of individuals and teams dealing with high-stakes crises. Hand-held electronic cognitive aids have rarely been investigated. A randomized controlled trial was conducted to investigate the effects of a smartphone application, named MAX (for Medical Assistance e...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aex256
更新日期:2017-11-01 00:00:00
abstract:BACKGROUND:There is limited clinical experience with xenon in a large number of patients. We present intra- and postoperative haemodynamic and recovery data comparing xenon and total intravenous anaesthesia with propofol. METHODS:A total of 160 patients aged 18-60 years (ASA I and II) undergoing elective surgery took ...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/aei023
更新日期:2005-02-01 00:00:00
abstract::We have compared the effects of the anaesthetic gases nitrogen and argon on adenosine diphosphate (ADP)-induced human blood platelet aggregation with the effects of the non-anaesthetic gas helium. All three gases showed dose-dependent inhibition of platelet aggregation. For nitrogen and argon there was a linear relati...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/64.1.77
更新日期:1990-01-01 00:00:00
abstract:BACKGROUND:Left ventricular stroke volume variation (SVV) has been shown to be a predictor of fluid responsiveness in various subsets of patients. However, the accuracy and reliability of SVV are unproven in patients ventilated with low tidal volumes. METHODS:Fourteen patients were studied immediately after coronary a...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aeh280
更新日期:2004-12-01 00:00:00
abstract::The results of the ventilatory management of babies, obtained in the first 3 years of a neonatal surgical intensive care unit, are assessed. Overall mortality figures and detailed examination of the cause of death in individual diagnostic groups support a selective approach to intermittent positive pressure ventilatio...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/52.3.273
更新日期:1980-03-01 00:00:00
abstract::A technique of induction of anaesthesia using propanidid, lignocaine and suxamethonium is described, and the muscle fasciculations that follow it are shown to be significantly less than those accompanying induction with methohexitone and suxamethonium. ...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/bja/47.6.723
更新日期:1975-06-01 00:00:00
abstract::We studied a cat model simulating laudanosine accumulation in the "anephric" patient. Cardiovascular effects were seen only with the bolus doses of laudanosine 2 mg kg-1, and at plasma laudanosine concentrations unlikely to be achieved clinically. Similarly, EEG and power spectra analysis showed no evidence of epilept...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/58.suppl_1.14s
更新日期:1986-01-01 00:00:00
abstract::We have studied the effects of flow and dobutamine on systemic haemodynamic variables, oxygen delivery (DO2) and oxygen consumption (VO2) in 20 patients during cardiopulmonary bypass (CPB) with mild hypothermia (34 degrees C). In a subgroup of seven patients, we also studied the effects on gastric microcirculatory blo...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/76.1.5
更新日期:1996-01-01 00:00:00
abstract::A 4-year-old girl developed severe hepatitis following the fourth administration of halothane in a period of 5 months. She was shown to have a circulating antibody which acted specifically against rabbit hepatocyte previously sensitized to halothane. The patient made a full recovery from the hepatitis, but 5 months la...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/54.3.349
更新日期:1982-03-01 00:00:00
abstract:BACKGROUND:The safety of performing spinal anaesthesia for both patients and anaesthetists alike in the presence of active infection with the novel coronavirus disease 2019 (COVID-19) is unclear. Here, we report the clinical characteristics and outcomes for both patients with COVID-19 and the anaesthetists who provided...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2020.03.007
更新日期:2020-06-01 00:00:00