Abstract:
BACKGROUND:In a series of ex vivo and in vivo studies we investigated the ability of repetitive ketamine administration to alter the metabolism and anaesthetic effect of propofol and the role of ketamine-mediated P-450 2B induction in rats. METHODS:Male Wistar rats were pretreated with 80 mg kg(-1) ketamine i.p. twice daily for 4 days. Pentoxyresorufin O-dealkylation (PROD), P-450 2B protein and mRNA were determined. Residual propofol concentration was measured after incubating hepatic microsomes with 100 muM propofol. Sleeping times induced by i.p. 80 mg kg(-1) propofol were determined. Orphenadrine, a P-450 2B inhibitor, was added in both ex vivo and in vivo studies. Finally, serial whole blood propofol concentrations were determined after i.v. infusion of 15 mg kg(-1) propofol. RESULTS:Ketamine pretreatment produced 5.4-, 3.4- and 1.7-fold increases in hepatic PROD activity, P-450 2B protein and mRNA, respectively. Residual propofol concentration was 46% lower after incubation with microsomes from ketamine-pretreated rats than in the control group. The addition of orphenadrine to ketamine-pretreated microsomes produced an increase in residual propofol concentration in a concentration-dependent manner. Ketamine pretreatment reduced propofol sleeping time to 12% of the control, which was reversed by orphenadrine. The whole blood propofol concentration in ketamine-pretreated rats was significantly lower than that of control rats at 1, 2, 4 and 8 min after cessation of propofol infusion. CONCLUSIONS:Repetitive ketamine administration enhances propofol metabolism and reduces propofol sleeping time in rats. We suggest that P-450 2B induction may produce ketamine-propofol interaction in anaesthetic practice.
journal_name
Br J Anaesthjournal_title
British journal of anaesthesiaauthors
Chan WH,Chen TL,Chen RM,Sun WZ,Ueng THdoi
10.1093/bja/ael173subject
Has Abstractpub_date
2006-09-01 00:00:00pages
351-8issue
3eissn
0007-0912issn
1471-6771pii
S0007-0912(17)35436-3journal_volume
97pub_type
杂志文章abstract:BACKGROUND:The effects of thoracic epidural anaesthesia (TEA) on gastric mucosal microvascular haemoglobin oxygenation (microHbO(2)) are unclear. At the splanchnic level, reduction of sympathetic tone may promote vasodilation and increase microHbO(2). However, these splanchnic effects are counteracted by systemic effec...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aeh235
更新日期:2004-10-01 00:00:00
abstract::We have evaluated the effect of delivering nitric oxide using a continuous flow system (CFS) or two commercially available proportional gas injection systems (PGIS), Nodomo (Dräger, Lübeck, Germany) and Pulmonox-Mini (Messer Griesheim Austria, Gumpoldskirchen, Austria) on measured and simulated concentrations of nitri...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/81.4.544
更新日期:1998-10-01 00:00:00
abstract::The effect of ketamine analgesia on gastric emptying was assessed in five healthy volunteers. Gastric emptying, estimated indirectly by the absorption of orally administered paracetamol, was not significantly delayed following administration of i.m. ketamine when compared with placebo. ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/53.12.1321
更新日期:1981-12-01 00:00:00
abstract::We have assessed neuromuscular block electromyographically at the gastrocnemius muscle and compared it with that at the abductor digiti minimi muscle in 60 adult patients undergoing cervical spine surgery under general anaesthesia. All patients were in the prone position. After vecuronium 0.2 mg kg-1, times to onset o...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,收录出版
doi:10.1093/bja/82.3.329
更新日期:1999-03-01 00:00:00
abstract::We describe the anaesthetic management of a patient who underwent transthoracic endoscopic vagotomy. One-lung ventilation was necessary to provide adequate surgical access. Potential intraoperative problems involved arterial oxygen saturation during one-lung ventilation, unequal intrathoracic pressures causing mediast...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/68.3.318
更新日期:1992-03-01 00:00:00
abstract::The study of rare families with inherited pain insensitivity can identify new human-validated analgesic drug targets. Here, a 66-yr-old female presented with nil requirement for postoperative analgesia after a normally painful orthopaedic hand surgery (trapeziectomy). Further investigations revealed a lifelong history...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2019.02.019
更新日期:2019-08-01 00:00:00
abstract::We have measured in 38 patients the plasma concentration profile of atracurium and its effect on the electromyographic first response of the train-of-four. One of three techniques was used to supplement anaesthesia with 66% nitrous oxide in oxygen, 0.9% isoflurane (end-tidal), 0.5% halothane (end-tidal) or midazolam 3...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/70.1.38
更新日期:1993-01-01 00:00:00
abstract::Bupivacaine 2.5 mg kg-1 (0.5 ml kg-1 of 0.5% solution), with or without adrenaline 5 micrograms ml-1, was administered by interpleural injection to 12 patients after elective cholecystectomy. Noncompartmental analysis indicated that the addition of adrenaline had no effect on total body clearance, apparent volume of d...
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/64.6.662
更新日期:1990-06-01 00:00:00
abstract::The cardiorespiratory effects of increasing respiratory frequency were investigated in two groups of dogs ventilated mechanically with a system which minimized apparatus and anatomical deadspace. In one group minute volume was constant whilst frequency was increased; in the second group minute volume was increased to ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/52.5.475
更新日期:1980-05-01 00:00:00
abstract::The processed electroencephalogram (pEEG) was monitored in eight patients undergoing gynaecological laparotomy under combined extradural and nitrous oxide-isoflurane anaesthesia. Pre-incisional mean spectral edge frequency 95 percentile (SEF95) and median frequency (MF) were 11.67 (SD 1.63) Hz and 3.74 (0.24) Hz, resp...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/78.6.751
更新日期:1997-06-01 00:00:00
abstract:BACKGROUND:The analgesia/nociception index (ANI), a 0-100 non-invasive index calculated from heart rate variability, reflects the analgesia/nociception balance during general anaesthesia. The aim of this study was to evaluate the ANI in the assessment of immediate postoperative pain in adult patients undergoing general...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aet110
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND:We defined the nature of the pharmacological interaction after intrathecal co-administration of ginsenosides with clonidine, and clarified the contribution of the α-2 adrenoceptors on the effect of ginsenosides. METHODS:Pain was evoked by injection of a formalin solution (5%, 50 μl) into the hindpaw of male...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aeq367
更新日期:2011-03-01 00:00:00
abstract::The effect of the administration of propranolol 0.15 mg per kg body weight i.v. on the metabolic response to pelvic surgery was compared with results in similar patients who had not received propranolol. The only significant difference between the two groups was a lower plasma insulin concentration in the beta-blockad...
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/52.12.1231
更新日期:1980-12-01 00:00:00
abstract:BACKGROUND:The surgical pleth index (SPI) is a measurement of intraoperative nociception. Evidence of its usability in children is limited. Given that the autonomic nervous system is still developing during the first years of life, the performance of the SPI on small children cannot be concluded from studies carried ou...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aew215
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND:Overt stroke after non-cardiac surgery has a substantial impact on the duration and quality of life. Covert stroke in the non-surgical setting is much more common than overt stroke and is associated with an increased risk of cognitive decline and dementia. Little is known about covert stroke after non-cardia...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,多中心研究
doi:10.1093/bja/aew179
更新日期:2016-08-01 00:00:00
abstract:BACKGROUND:Platelet inhibition is mandatory therapy after percutaneous coronary intervention (PCI). Withdrawal of oral antiplatelet agents has been linked to increased incidence of postoperative adverse cardiac events in post-PCI patients having non-cardiac surgery (NCS). There is limited knowledge of temporal changes ...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1093/bja/aev556
更新日期:2016-04-01 00:00:00
abstract::Maternal haemorrhage is the leading cause of preventable maternal death worldwide and encompasses antepartum, intrapartum, and postpartum bleeding. This review highlights factors that predispose to severe bleeding, its management, and the most recent treatment and guidelines. Advances in obstetric care have provided p...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,评审
doi:10.1093/bja/aep303
更新日期:2009-12-01 00:00:00
abstract::Haemodynamic changes (supraventricular tachycardia, decreases in arterial pressure) were observed during laryngoscopy and intubation of the trachea in a patient receiving nifedipine and verapamil. Before the induced stresses of laryngoscopy and tracheal intubation, these drugs had controlled the patient's arterial pre...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/58.3.357
更新日期:1986-03-01 00:00:00
abstract::Experiments were performed on 14 anaesthetized, artifically ventilated dogs, in which efferent activity in the phrenic nerve was recorded and blood-gas tensions, arterial pH and core temperature were controlled. Doses of midazolam between 0.2 mg kg-1 and 2 mg kg-1 abolished phrenic nerve activity for periods between 3...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/56.10.1161
更新日期:1984-10-01 00:00:00
abstract:BACKGROUND:Anaesthetic drugs act at sites within the brain that undergo profound changes during typical ageing. We postulated that anaesthesia-induced brain dynamics observed in the EEG change with age. METHODS:We analysed the EEG in 155 patients aged 18-90 yr who received propofol (n=60) or sevoflurane (n=95) as the ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aev213
更新日期:2015-07-01 00:00:00
abstract::We present a new pattern of nerve stimulation--double burst stimulation (DBS)--to detect residual neuromuscular block manually. The DBS consists of two short lasting, 50-Hz tetanic stimuli or bursts separated by a 750-ms interval. The response to this pattern of stimulation is two single separated muscle contractions ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/62.3.274
更新日期:1989-03-01 00:00:00
abstract::We tested the hypothesis that the solvent for etomidate was a factor in the incidence of pain and other side effects after injection, and that these were associated with histamine release. Nine of 10 volunteers who received etomidate in a propylene glycol formulation reported moderate to severe pain on injection; only...
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/83.3.464
更新日期:1999-09-01 00:00:00
abstract::Recommendations for resuscitation of patients in early haemorrhagic shock, with active ongoing bleeding, have evolved in recent years. This review covers current theories of the pathophysiology of shock and recommended treatments, including damage control surgery, deliberate hypotensive management, administration of a...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,评审
doi:10.1093/bja/aes389
更新日期:2012-12-01 00:00:00
abstract::We present an unusual case of hypercapnia and surgical emphysema during transanal endoscopic microsurgery, which led to delayed post-operative ventilatory failure. The hypercapnia and surgical emphysema were secondary to rectal insufflation with carbon dioxide used to facilitate visualization and resection of a rectal...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/86.4.586
更新日期:2001-04-01 00:00:00
abstract:BACKGROUND:Ketamine is widely used as an i.v. anaesthetic agent and as a drug of abuse. Hepatocytes contribute to the metabolism of endogenous and exogenous substances. This study evaluated the toxic effects of S-(+)-ketamine and possible mechanisms using human hepatoma HepG2 cells as the experimental model. METHODS:H...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aen322
更新日期:2009-01-01 00:00:00
abstract::Patients with metastatic carcinoid tumours often undergo surgical procedures to reduce the tumour burden and associated debilitating symptoms. These procedures and anaesthesia can precipitate a life-threatening carcinoid crisis. To assess perioperative outcomes, we studied retrospectively the medical records of adult ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/87.3.447
更新日期:2001-09-01 00:00:00
abstract:BACKGROUND:This study focuses on a recently developed robotic nerve block system and its impact on learning regional anaesthesia skills. We compared success rates, learning curves, performance times, and inter-subject performance variability of robot-assisted vs manual ultrasound (US)-guided nerve block needle guidance...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aet440
更新日期:2014-06-01 00:00:00
abstract:BACKGROUND:Aortocaval compression (ACC) can result in haemodynamic disturbances and uteroplacental hypoperfusion in parturients. Its detection is difficult because in most patients, sympathetic compensation results in no signs or symptoms. However, profound hypotension may develop after sympathectomy during regional an...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aes349
更新日期:2012-12-01 00:00:00
abstract::An investigation was carried out into the relationship between the inflation pressures of normally compliant lungs and the airways pressure necessary to produce the insufflation of gas to the stomach. This relationship was examined during manual ventilation with a mask, using a rapid sequence induction technique. In t...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/59.3.315
更新日期:1987-03-01 00:00:00
abstract::This paper reports three investigations of the suggested relationship between sudden infant death syndrome (SIDS) and malignant hyperpyrexia (MH). In the first study 151 MH-susceptible families completed a questionnaire designed to identify the incidence of SIDS within their own pedigree. In the second study 106 SIDS ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/60.1.28
更新日期:1988-01-01 00:00:00