Abstract：
:A mathematical model of a subject breathing from a circle system has been used to follow the course of anaesthetic uptake during the simulated administration of 60% nitrous oxide, 2% halothane and 2% methoxyflurane, under non-rebreathing conditions and with fresh gas flows to the circle system of between 8 and 0.25 litre min-1. Compared with the non-rebreathing state, the use of a circle system reduced the initial rate of increase of alveolar towards fresh gas anaesthetic concentration, and the rate of increase in body anaesthetic content. The degree of reduction became more marked as fresh gas flow was reduced, and as agents of increasing blood solubility were used. These effects of a circle system were influenced by the volume of the circle system and the composition of gas initially present within the system. When the circle system was in use there were increases in the magnitude of both the concentration effect and the second gas effect which were related to the magnitude of fresh gas flow. The use of a circle system augmented the effects of changes in cardiac output and reduced the effects of changes in ventilation on the alveolar concentrations of the anaesthetic. These influences of a circle system were also dependent on the magnitude of fresh gas flow. The degree of augmentation of the effects of cardiac output decreased with increasing blood solubility of the agent in use, whilst the limitation of the effects of ventilation was greatest with the agent of highest blood solubility. Both under non-rebreathing conditions and with the circle system in use, the effects of cardiac output and ventilation were greater with 2% nitrous oxide than with 60% nitrous oxide, and were also greater when gases were given separately than when administered in combination.
journal_name
Br J Anaesthjournal_title
British journal of anaesthesiaauthors
Conway CMdoi
10.1093/bja/58.10.1167subject
Has Abstractpub_date
1986-10-01 00:00:00pages
1167-80issue
10eissn
0007-0912issn
1471-6771pii
S0007-0912(17)39217-6journal_volume
58pub_type
杂志文章abstract：BACKGROUND:This study compared the efficacy of topical anaesthesia with levobupivacaine 0.75% vs lidocaine 2% during cataract surgery by phacoemulsification. METHODS:A prospective, randomized, double-blind study comparing two agents for topical anaesthesia in cataract surgery. Two hundred and forty-six consecutive pat...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,随机对照试验
doi：10.1093/bja/aen369
更新日期：2009-02-01 00:00:00
abstract：:Dysregulation of the immuno-inflammatory response, as seen in sepsis, may culminate in host cell and organ damage. Lipopolysaccharide from Gram-negative bacterial cell walls induces gene activation and subsequent inflammatory mediator expression. Gene activation is regulated by a number of transcription factors at the...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,评审
doi：10.1093/bja/aeg034
更新日期：2003-02-01 00:00:00
abstract：:The majority of patients with acute respiratory distress syndrome (ARDS) require mechanical ventilation. This support provides time for the lungs to heal, but the adverse effects of mechanical ventilation significantly influence patient outcome. Traditionally, these were ascribed to mechanical effects, such as haemody...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,评审
doi：10.1093/bja/aeh031
更新日期：2004-02-01 00:00:00
abstract：BACKGROUND:Several medications have proved to be useful in preventing postoperative nausea and vomiting (PONV). However, routine antiemetic prophylaxis is not cost-effective. We evaluated the accuracy and discriminating power of an artificial neural network (ANN) to predict PONV. METHODS:We analysed data from 1086 in-...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/ael282
更新日期：2007-01-01 00:00:00
abstract：:Artery-to-muscle (A-M) onset time for five neuromuscular blocking agents was studied in 50 female patients under light endotracheal anaesthesia. Circulation to the right arm was occluded by a tourniquet and released 1 min after the injection i.v. into the left arm of a myoneural blocking drug. Muscle twitches were rec...
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/52.4.403
更新日期：1980-04-01 00:00:00
abstract：:The water soluble benzodiazepine midazolam was compared with diazepam, in doses of 0.07 mg kg-1 and 0.15 mg kg-1 respectively, administered i.v. to 100 patients undergoing gastroscopy. The degree of sedation, ease of endoscopy and recovery were comparable in the two groups. The effects of both drugs on arterial pressu...
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/55.8.773
更新日期：1983-08-01 00:00:00
abstract：:We tested the hypothesis that pressures exerted on the pharyngeal mucosa by the laryngeal mask airway (LMA) and cuffed oropharyngeal airway (COPA) differ, in 20 male and 20 female adult patients. Microchip pressure sensors were attached to the LMA and COPA at four similar anatomical locations (base of the tongue, late...
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/82.6.922
更新日期：1999-06-01 00:00:00
abstract：BACKGROUND:Hydroxyethyl starch (HES) may affect blood coagulation. We studied the effects of a modified, balanced, high-molecular weight [mean molecular weight (MW) 550 kDa], high-substituted [degree of substitution (DS) 0.7] HES preparation (Hextend) on coagulation in patients undergoing major abdominal surgery. METH...
journal_title：British journal of anaesthesia
pub_type： 临床试验,杂志文章,随机对照试验,收录出版
doi：10.1093/bja/aef242
更新日期：2002-11-01 00:00:00
abstract：:We have studied 16 healthy volunteers whose lungs were preoxygenated six times each in order to assess the amount of room air entrained during tidal volume preoxygenation if a good seal is not maintained between the face mask and the face. With a fresh gas flow of 10 litre min-1, we found that using gravity alone to h...
journal_title：British journal of anaesthesia
pub_type： 临床试验,杂志文章
doi：10.1093/bja/75.6.777
更新日期：1995-12-01 00:00:00
abstract：BACKGROUND:Ultrasound-guided internal jugular venous access increases the rate of successful cannulation and reduces the incidence of complications, compared with the landmark technique. Three transducer orientation approaches have been proposed for this procedure: short-axis (SAX), long-axis (LAX) and oblique-axis (OA...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,随机对照试验
doi：10.1093/bja/aev399
更新日期：2016-03-01 00:00:00
abstract：:The effect on intervillous blood flow of lumbar extradural analgesia for Caesarean section was studied in nine healthy women using xenon-133. Extradural anaesthesia was performed with lignocaine 1 1/2% 16--20 ml with adrenaline 5 microgram ml-1. Impairment of placental blood flow during the block was observed in seven...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/50.3.275
更新日期：1978-03-01 00:00:00
abstract：:We studied 52 adults undergoing elective craniotomy, allocated randomly to one of three opioid treatments: alfentanil 50 micrograms kg-1 followed by 0.833 microgram kg-1 min-1 until dural closure (group Alf.); alfentanil 50 micrograms kg-1 followed by 0.833 microgram kg-1 min-1 for 2 h, then remifentanil 0.25 microgra...
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/81.3.361
更新日期：1998-09-01 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：:In a randomized study of patients undergoing Caesarean section, either enflurane (mean 0.24 MAC-h) or halothane (mean 0.23 MAC-h) and 50% nitrous oxide in oxygen were administered to women (n = 12) with severe pre-eclampsia-eclampsia and to 16 healthy pregnant patients with normal renal and hepatic function. No eviden...
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/56.6.587
更新日期：1984-06-01 00:00:00
abstract：BACKGROUND:Capnography may provide useful non-invasive bedside information concerning heterogeneity in lung ventilation, ventilation-perfusion mismatching and metabolic status. Although the capnogram may be recorded by mainstream and sidestream techniques, the capnogram indices furnished by these approaches have not pr...
journal_title：British journal of anaesthesia
pub_type： 评论,杂志文章
doi：10.1093/bja/aew127
更新日期：2016-07-01 00:00:00
abstract：:The Swedish Society of Anaesthetists conducted a nationwide retrospective survey of clinical experience with extradural and intrathecal opiates. Special interest was focused on the frequency and type of ventilatory depression. The questionnaire was answered by 84 of 93 departments (90%). Up to May 1981 extradural morp...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/54.5.479
更新日期：1982-05-01 00:00:00
abstract：BACKGROUND:Age and diabetes mellitus have been identified as independent risk factors for cognitive decline after cardiac surgery with cardiopulmonary bypass (CPB). We tested the effects of CPB on cognitive function in aged and diabetic rats utilizing the Morris water maze (MWM). METHODS:Aged rats (26 months) were ran...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/aem116
更新日期：2007-08-01 00:00:00
abstract：:Bispectral index (BIS) was assessed as a monitor of depth of anaesthesia during fentanyl and midazolam anaesthesia for coronary bypass surgery. In 10 patients given morphine premedication, anaesthesia was induced with a combination of midazolam and fentanyl and thereafter maintained with a continuous infusion of a mix...
journal_title：British journal of anaesthesia
pub_type： 临床试验,杂志文章
doi：10.1093/oxfordjournals.bja.a013587
更新日期：2000-06-01 00:00:00
abstract：:We have examined the role of gamma-aminobutyric acid (GABA) neurones in propofol anaesthesia in mice using the righting reflex. Propofol i.p. increased the percentage of loss of the righting reflex in a dose-dependent manner with an ED50 value of 140 (95% confidence limits 123-160) mg kg-1 (n = 40; eight animals per d...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/83.4.665
更新日期：1999-10-01 00:00:00
abstract：:We studied the interactive effect of dexmedetomidine and morphine on gastric emptying and gastrointestinal transit in the rat. In one group of rats, to examine the interactive effect on gastrointestinal transit, the two drugs were injected i.p. in a fixed ratio (30: 1)--that of their ED50 values--in six doses (0.062-1...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/80.1.63
更新日期：1998-01-01 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：BACKGROUND:Low-dose droperidol is suggested to be cost-effective in preventing nausea and vomiting after ambulatory surgery. This clinical study evaluated patient postural stability using a computerized force platform after an i.v. dose of droperidol 0.625 mg in outpatients undergoing gynaecological dilatation and cure...
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/88.6.819
更新日期：2002-06-01 00:00:00
abstract：:We have evaluated the level of state and trait anxiety, neuroticism, extroversion and coping style as predictors of the effectiveness of patient-controlled analgesia (PCA) in 110 patients undergoing total abdominal hysterectomy. After operation patients were allocated to receive pain control with either PCA or i.m. in...
journal_title：British journal of anaesthesia
pub_type： 临床试验,杂志文章
doi：10.1093/bja/74.3.271
更新日期：1995-03-01 00:00:00
abstract：:Most human phenotypic characteristics are determined by the interplay of environmental factors (whether external, or related to the internal milieu) with the unique genetic attributes of the individual. The same is true for predisposition to and outcome from most disease states, with acute brain injury being no except...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,评审
doi：10.1093/bja/aem142
更新日期：2007-07-01 00:00:00
abstract：:Bilateral superior laryngeal nerve block was combined with topical application of local anaesthetic 140 times in 135 patients to anaesthetize the upper airway and facilitate tracheal intubation, laryngeal instrumentation, or to diminish the response to the endotracheal tube, in a patient already intubated. The techniq...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/53.10.1055
更新日期：1981-10-01 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：:Nausea and vomiting occur commonly during and after Caesarean delivery (CD) performed under neuraxial anaesthesia. Metoclopramide is a prokinetic agent reported to be safe in parturients. This meta-analysis assesses the efficacy of metoclopramide for prophylaxis against intra- and postoperative nausea and vomiting (IO...
journal_title：British journal of anaesthesia
pub_type： 杂志文章,meta分析,评审
doi：10.1093/bja/aer509
更新日期：2012-03-01 00:00:00
abstract：:We have examined the effects of sedation with midazolam 0.1 mg kg-1 and reversal with flumazenil 0.5 mg on beat-to-beat heart rate (HR) variability (HRV), systolic arterial pressure (SAP), finger photoplethysmograph amplitude (PLA) and impedence pneumography in eight volunteers. With the onset of sedation there was a ...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/76.4.503
更新日期：1996-04-01 00:00:00
abstract：BACKGROUND:Increasing fresh gas flow (FGF) to a circle breathing system reduces carbon dioxide (CO2) absorbent consumption. We assessed the environmental and economic impacts of this trade-off between gas flow and absorbent consumption when no inhalational anaesthetic agent is used. METHODS:A test lung with fixed CO2 ...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1016/j.bja.2020.07.043
更新日期：2020-11-01 00:00:00
abstract：BACKGROUND:Fibrinolysis contributes to coagulopathy after major trauma and surgery. We hypothesized that progressive haemodilution is responsible, at least in part, for increased fibrinolytic tendency of blood clot. METHODS:The study was performed in two parts. First, whole blood (WB) samples collected from six health...
journal_title：British journal of anaesthesia
pub_type： 杂志文章
doi：10.1093/bja/aeq001
更新日期：2010-03-01 00:00:00
