Abstract:
BACKGROUND:Thermal, mechanical, and electrical stimuli are often used in acute pain studies and cause qualitatively different pain sensations. Yet, the comparative electroencephalogram (EEG) changes caused by these stimuli have not been studied. We hypothesized that because these stimuli cause different pain sensations, EEG responses would also differ. METHODS:Anaesthesia was maintained with halothane in 46 male Sprague-Dawley rats. The EEG was recorded from the primary somatosensory cortices and vertex. Supramaximal noxious stimuli were applied to the tail and comprised mechanical (forceps clamp 20 N), thermal (52 degrees C water bath), and electrical (50 V, 50 Hz for 2 s) stimuli. The EEG descriptors median frequency (F50), spectral edge frequency (F95), and total power (P(tot)) recorded before (baseline) and after noxious stimulation were compared. Data were analysed using two-way factorial ANOVA (stimulus, EEG channel) followed by Bonferroni adjusted post-tests (P < 0.05). RESULTS:F50 increased during electrical stimulation compared with all baseline periods in all EEG channels, increases from baseline ranging from 115.3 (SD 34.8) to 122.1 (39.6)% for the various channels. A significant increase in F50 during thermal stimulation was identified in some EEG channels, whereas no changes in F50 during mechanical stimulation occurred. Changes in F95 during any stimulus compared with baseline were not significant. CONCLUSIONS:Different noxious stimuli caused differing EEG changes. As the somatosensory cortex contains relatively few exclusively nociceptive neurons, the EEG recorded from this region during the application of predominantly noxious stimuli (mechanical and thermal) may demonstrate minimal cortical activation compared with non-specific electrical noxious stimuli.
journal_name
Br J Anaesthjournal_title
British journal of anaesthesiaauthors
Murrell JC,Mitchinson SL,Waters D,Johnson CBdoi
10.1093/bja/ael377subject
Has Abstractpub_date
2007-03-01 00:00:00pages
366-71issue
3eissn
0007-0912issn
1471-6771pii
S0007-0912(17)34879-1journal_volume
98pub_type
杂志文章abstract:BACKGROUND:State entropy (SE) is a newly available monitor for depth of anaesthesia. We investigated whether the relationship between predicted effect-site propofol concentration and Bispectral Index (BIS) and SE values is useful for predicting loss of verbal contact and loss of consciousness during steady-state condit...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aei075
更新日期:2005-04-01 00:00:00
abstract::A new design of tracheal tube cuff was compared with two types of high-volume, low-pressure (HVLP) cuffed tracheal tube for leakage of fluid from the subglottic space into the trachea. Spontaneous and positive-pressure ventilation were simulated using a mechanical lung, an intubated model trachea and a ventilator. Exc...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/80.6.796
更新日期:1998-06-01 00:00:00
abstract::A specific technique for detection of pulmonary aspiration during the perioperative period is lacking. In this study, we developed a scintigraphic method for its diagnosis. Technetium 99m sulphur colloid was given orally 2 h before an i.v. infusion of propofol in patients undergoing elective colonoscopy. During the pr...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/87.2.204
更新日期:2001-08-01 00:00:00
abstract:BACKGROUND:Anaesthetics blunt neuronal responses to noxious stimulation, including effects on electroencephalographic (EEG) responses. It is unclear how anaesthetics differ in their ability to modulate noxious stimulation-evoked EEG activation. We investigated the actions of propofol and halothane on EEG responses to n...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aei208
更新日期:2005-10-01 00:00:00
abstract::The activity of the enzyme methionine synthase in fetal and maternal liver was investigated before and after exposure to nitrous oxide. Timed-pregnant rats on day 19 of gestation were exposed to either 10% or 50% nitrous oxide for various times up to 240 min. After exposure, fetal and maternal livers were removed and ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/56.5.523
更新日期:1984-05-01 00:00:00
abstract::An histaminoid reaction after the administration of thiopentone and atracurium is described. Serial blood sampling showed no evidence of complement activation. Intradermal testing 6 weeks later yielded a positive result with atracurium (1 in 1000), but not with thiopentone. The clinical course of the reaction and the ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/57.8.811
更新日期:1985-08-01 00:00:00
abstract:BACKGROUND:Recent studies have shown that ultrasound guidance for paediatric regional anaesthesia can improve the quality of upper extremity and neuraxial blocks. We therefore investigated whether ultrasound guidance for sciatic and femoral nerve blocks prolongs sensory blockade in comparison with nerve stimulator guid...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aem092
更新日期:2007-06-01 00:00:00
abstract::In 1849 John Snow, already the leading anaesthetic practitioner and innovator of his day, made a historic contribution to the epidemiology of infectious disease by his famous study of the distribution of cholera around the area of Broad Street in London. We report on our experience as anaesthetists in a field hospital...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/75.6.810
更新日期:1995-12-01 00:00:00
abstract::We report a case of lumbar radiculopathy after zygapophyseal joint injections for chronic low back pain. The management of the patient and potential causes for the radiculopathy are discussed. The case acts as a reminder that the spinal nerve roots should be considered when performing intra-articular facet joint injec...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aem178
更新日期:2007-09-01 00:00:00
abstract::We have compared bupivacaine 5 mg ml-1, either isobaric in saline 0.9% or hyperbaric in 8% glucose, for spinal anaesthesia in 100 children, aged 2-115 months, in a double-blind, randomized, parallel group, prospective study. Children were premedicated with diazepam 0.5 mg kg-1 orally. Seventy-two children were sedated...
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/81.4.502
更新日期:1998-10-01 00:00:00
abstract::The use of atracurium during major abdominal surgery was assessed in 20 infants with hepatic dysfunction caused by biliary atresia. An initial dose of 0.6 mg kg-1 provided excellent intubating conditions in all patients. Subsequent neuromuscular blockade was monitored with a peripheral nerve stimulator and incremental...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/58.11.1214
更新日期:1986-11-01 00:00:00
abstract:BACKGROUND:Pulse pressure variation (PPV) and stroke volume variation (SVV) are robust indicators of fluid responsiveness in mechanically ventilated supine patients. The aim of the study was to evaluate the ability of PPV and SVV to predict fluid responsiveness in mechanically ventilated patients in the prone position ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aeq031
更新日期:2010-04-01 00:00:00
abstract::We have measured plasma concentrations of bupivacaine after ilioinguinal block in children of different sizes. We studied 14 children with weights 10-15 kg and 17 children with weights 15-30 kg. Each child received 0.5% bupivacaine 0.25 ml kg-1 (1.25 mg kg-1) (Carbostesin, Astra, Germany). Venous blood was obtained be...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/76.3.452
更新日期:1996-03-01 00:00:00
abstract::The concept of rapid delivery of multiple blood products to the bedside of a massively haemorrhaging patient seems to be a logical approach to the management of the massively bleeding patient. However, controversy exists in the use of fixed blood component ratios. Assessing the extent of the coagulopathy through point...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,评审
doi:10.1093/bja/aeu379
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Chronic pain is no longer an effective warning system, but a syndrome with co-morbidities and many causes, needing a careful evaluation. Questions remain about the pain behaviour of chronic pain patients compared with patients with acute pain, or healthy subjects that we investigated. METHODS:We compared th...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1016/j.bja.2018.04.042
更新日期:2018-09-01 00:00:00
abstract:BACKGROUND:Serum vascular endothelial growth factor-C (VEGF-C), transforming growth factor-β (TGF-β), and interleukin (IL)-6 promote angiogenesis and metastases in colon cancer. We hypothesized that patients who received propofol-epidural anaesthesia (PEA) would exhibit decreases in VEGF-C, TGF-β, and IL-6 and an incre...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aeu148
更新日期:2014-07-01 00:00:00
abstract::This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief of British Journal of Anaesthesia. The study is retracted for the following reasons: Statistical analysis suggests t...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,撤回出版物
doi:10.1016/j.bja.2018.11.007
更新日期:2019-01-01 00:00:00
abstract::In the dog, pancuronium 0.2 mg/kg increased left ventricular systolic pressure and systemic arterial pressure, but did not change central venous pressure. Repeated doses produced diminishing responses and eventually no change in arterial pressure. After tachyphylaxis was established, a pressor response to pancuronium ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/48.12.1143
更新日期:1976-12-01 00:00:00
abstract::Gastric (GP) and lower oesophageal sphincter pressures (LOSP) were measured in non-pregnant female volunteers (group I) and pregnant women with (group III) or without (group II) heartburn. Patients in early pregnancy had greater gastric pressures than group I. Mean barrier pressure (LOSP-GP) was significantly decrease...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/53.4.381
更新日期:1981-04-01 00:00:00
abstract::We have compared the antagonism of neuromuscular block produced by pipecuronium with pancuronium in 80 anaesthetized surgical patients using mechanomyography and electromyography. Pancuronium 0.1 mg kg-1 or pipecuronium 0.07 mg kg-1 was given after induction of anaesthesia and neuromuscular block was adjusted to 75% t...
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/74.4.410
更新日期:1995-04-01 00:00:00
abstract::The possibility of an interaction between diazepam and pancuronium bromide was investigated in six patients undergoing general anaesthesia maintained with fentanyl, droperidol and nitrous oxide. Neuromuscular blockade was controlled using a feedback mechanism which automatically adjusted the rate of injection of pancu...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/53.8.859
更新日期:1981-08-01 00:00:00
abstract::The effects of physostigmine 1 mg i.v. were studied on the analgesia, sedation and reduction in respiratory rate induced by morphine 10 mg/60 kg i.v. in 10 patients recovering from surgery. Within 5-10 min, physostigmine abolished the somnolent effect of morphine and restored the respiratory rate to pre-drug values. A...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/54.4.429
更新日期:1982-04-01 00:00:00
abstract:BACKGROUND:Early clot amplitudes measured on thromboelastometry (ROTEM®) predict maximum clot firmness (MCF) in adults. In this multicentre, retrospective study, we aimed to confirm the suspected relationship between early ROTEM® variables and MCF, in children undergoing cardiac or non-cardiac surgery. METHODS:4762 RO...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,多中心研究
doi:10.1093/bja/aev369
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:The use of lipid emulsions to reduce cardiac toxicity of local anaesthetics (LAs) has shown success in experimental studies and some clinical cases, and thus has been implemented in clinical practice. However, lipid treatment is usually given after the occurrence of neurological or cardiovascular symptoms of...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aet353
更新日期:2014-04-01 00:00:00
abstract::Both the performance of breathing systems and recommendations for the fresh gas flows to be used in patients breathing spontaneously can be expressed in ml kg-1 min-1 or fresh gas: total ventilation ratio (VF:VE). We have examined the relationship between these two descriptions. The data of 106 subjects (awake volunte...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/71.6.796
更新日期:1993-12-01 00:00:00
abstract::Studies with an emulsion formulation of ICI 35 868 (2,6- diisopropylphenol ) indicate that this new formulation has anaesthetic properties in rats and mice, and haemodynamic effects in the mini-pig which are similar to those of the previously available Cremophor formulation. Administration of the emulsion formulation ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/56.6.617
更新日期:1984-06-01 00:00:00
abstract:BACKGROUND:Short-axis ultrasound-guided placement of central venous catheters (CVCs) is widely accepted as safe practice. However, utilizing the long-axis approach could further improve safety, as it allows for better visualization of the needle as it is advanced to the target vessel. However, the long-axis approach ha...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aer329
更新日期:2012-01-01 00:00:00
abstract::We describe a case of a 9-yr-old child with sickle cell disease complicated by abdominal vaso-occlusive crisis and priapism. Both complications were successfully treated with a combination of epidural local anesthetics and morphine. ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/87.6.935
更新日期:2001-12-01 00:00:00
abstract::Although rare, spinal haematoma and abscess after central neuraxial blocks may cause severe permanent neurological injury. Optimal treatment and outcome remain unclear. In order to identify possible predisposing patient characteristics and describe the ensuing clinical course, we searched Medline, Embase, and the Coch...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,评审
doi:10.1016/j.bja.2017.11.105
更新日期:2018-04-01 00:00:00
abstract::We have studied the effects of stepwise increasing infusion rates of propofol 200-500 micrograms kg-1 min-1 on blood concentrations of propofol and the disposition and clearance of a bolus dose of indocyanine green (ICG) 0.5 mg kg-1 in 10 acutely instrumented dogs. Drug concentrations and ICG clearance were measured 3...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/72.4.451
更新日期:1994-04-01 00:00:00