Abstract:
:The physical and pharmacological properties of the structural isomers isoflurane and enflurane differ from each other and from those of other potent inhaled anaesthetics. The minimum alveolar concentration (MAC) for isoflurane (1.15%) is one-and-one-half times that for halothane (0.75%) and two-thirds that for enflurane (1.7%). The blood/gas partition coefficient (1.4) for isoflurane is lower than the coefficients for all other potent inhaled agents. Despite this lower blood solubility, induction of anaesthesia is slightly faster with halothane because of isoflurane's mild pungency. Enflurane depresses ventilation more than isoflurane, which in turn is slightly more depressant than halothane. All these agents dilate constricted bronchi, and thus are useful in the anaesthetic management of patients who have asthma or chronic obstructive pulmonary disease. Isoflurane has the largest circulatory margin of safety of all potent halogenated agents; it produces the least myocardial depression at a given multiple of MAC. Isoflurane may increase heart rate, particularly in younger patients, and occasionally is associated with tachycardia. It decreases total peripheral resistance, thereby decreasing systemic arterial pressure. Although results from one study suggest that isoflurane may produce a "steal" or coronary blood flow in patients with coronary artery disease, results from other studies suggest that, even in the presence of coronary artery disease, coronary blood flow to all parts of the heart remains as adequate with isoflurane as with other anaesthetics. Greater concentrations of isoflurane (1.6 MAC) increase cerebral blood flow less than does halothane. Isoflurane does not produce convulsive activity, but can produce profound muscle relaxation. It enhances the action of tubocurarine or pancuronium, and (to a lesser extent) vecuronium or atracurium. The enhancement is comparable to that produced by enflurane. Less enhancement is produced by halothane or nitrous oxide-narcotic. Only 0.17% of isoflurane taken up in man appears as urinary metabolites. This resistance to biodegradation may explain the minimal or absent hepatotoxicity and nephrotoxicity of isoflurane.
journal_name
Br J Anaesthjournal_title
British journal of anaesthesiaauthors
Eger EI 2ndsubject
Has Abstractpub_date
1984-01-01 00:00:00pages
71S-99Seissn
0007-0912issn
1471-6771journal_volume
56 Suppl 1pub_type
杂志文章,评审abstract:BACKGROUND:Multiple cognitive and psychiatric disorders are associated with an increased tonic inhibitory conductance that is generated by α5 subunit-containing γ-aminobutyric acid type A (α5 GABAA) receptors. Negative allosteric modulators that inhibit α5 GABAA receptors (α5-NAMs) are being developed as treatments for...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2020.11.032
更新日期:2020-12-30 00:00:00
abstract::Many indices are used to quantify pulmonary oxygen transfer. Indices that use only measurements from arterial blood and inspired gas assume a constant C(a-v)O2. Though variations in C(a-v)O2 are recognized, indices such as PaO2/FIO2 remain popular and are often considered the best measure of pulmonary oxygen transfer ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/86.4.477
更新日期:2001-04-01 00:00:00
abstract::A variant of a rebreathing/indicator-dilution technique was used to measure lung volume. Two or three indicators, which should have essentially the same pulmonary volume of distribution, were used. Gas compositions were measured by respiratory mass spectrometry and an extrapolation was used to allow for oxygen consump...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/56.3.289
更新日期:1984-03-01 00:00:00
abstract::In 10 dogs, one carotid sinus was isolated from the systemic circulation without disturbing its sympathetic innervation. The isolated sinus was connected to a servo-controlled pressure generator which kept mean intrasinus pressure, pulse pressure, and frequency of pulsation constant. The carotid sinus baroreceptor ner...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/59.4.489
更新日期:1987-04-01 00:00:00
abstract::We determined in 51 healthy patients undergoing body surface surgery the dose requirements for propofol, as part of a total i.v. anaesthesia technique with an alfentanil infusion. After premedication with temazepam, patients received alfentanil 50 micrograms kg-1 followed by an infusion of 50 micrograms kg-1 h-1. Pati...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/65.2.157
更新日期:1990-08-01 00:00:00
abstract::The choice of an i.v. anaesthetic induction poses problems for the anaesthetist confronted with a patient with one of the acute porphyrias. We undertook a prospective clinical trial in 13 variegate porphyric subjects using propofol as an anaesthetic induction agent. Urinary porphyrin precursors and porphyrins were mea...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/66.1.60
更新日期:1991-01-01 00:00:00
abstract::Liver/gas partition coefficients for isoflurane, enflurane, halothane and methoxyflurane increased two-fold in rats killed 16 h after a single injection of 15% ethanol 7 g kg-1. In contrast, blood/gas and brain/gas partition coefficients did not change. Chronic (21 days) ingestion of ethanol increased liver/gas partit...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/58.5.551
更新日期:1986-05-01 00:00:00
abstract:BACKGROUND:The elderly are perceived as a high-risk group for procedural sedation. Concern exists regarding the safety of sedation of this patient group by emergency physicians, particularly when using propofol. METHODS:We analysed prospectively collected data on patients aged 75 yr or older undergoing sedation betwee...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2018.07.038
更新日期:2018-12-01 00:00:00
abstract::We have studied the effects of bilateral ilioinguinal nerve block and wound infiltration with 0.5% bupivacaine on postoperative pain and analgesic requirements in 62 patients undergoing Caesarean section under general anaesthesia. A control group received no local anaesthetic supplementation. Both ilioinguinal block a...
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/72.2.229
更新日期:1994-02-01 00:00:00
abstract:BACKGROUND:There has been a renewed interest in nitric oxide donor drugs, such as nitroglycerin, delivered by the inhalational route for treatment of pulmonary arterial hypertension (PAH). We investigated the acute effects of inhaled nitroglycerin on pulmonary and systemic haemodynamics in children with PAH associated ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/ael112
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:The memory effect of dexmedetomidine has not been prospectively evaluated in children. We evaluated the feasibility of measuring memory and sedation responses in children during dexmedetomidine sedation for non-painful radiological imaging studies. Secondarily, we quantified changes in memory in relation to ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aew421
更新日期:2017-02-01 00:00:00
abstract:BACKGROUND:Fast onset and short duration are prominent properties of the amide-type local anaesthetic articaine. Similar to bupivacaine, a hyperbaric solution of articaine may produce faster onset and shorter duration of spinal anaesthesia than a plain solution. METHODS:Patients undergoing open inguinal hernia repair ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aen294
更新日期:2008-12-01 00:00:00
abstract::A study of core temperature monitoring during general anesthesia indicates that this can be introduced as a routine procedure in order to reduce mortality from malignant hyperpyrexia. The temperature profiles of 2410 patients are presented. Both mean rectal and mean oesophageal temperatures decreased during general an...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/52.12.1223
更新日期:1980-12-01 00:00:00
abstract::We have studied the effects of alcuronium in 10 healthy, non-anaesthetized volunteers after they had been taking oral pyridostigmine 30 mg 8 hourly. The responses of adductor pollicis were recorded using an isolated forearm procedure (IFP) during onset and recovery of neuromuscular block produced by 1.5 mg of relaxant...
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/66.3.365
更新日期:1991-03-01 00:00:00
abstract::The interaction of three new non-depolarizing neuromuscular blocking agents--atracurium, vecuronium and Duador--on human red cell acetylcholinesterase (AChE; EC 3.1.1.7) and human plasma butyrylcholinesterase (BuChE; EC 3.1.1.8) was investigated. The binding of these neuromuscular blockers to human plasma proteins (pr...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:
更新日期:1983-01-01 00:00:00
abstract::Thirty-two patients received lumbar extradural anaesthesia for elective Caesarean section. The results obtained from this series were compared with those from a similar (control) group of parturients who received general anaesthesia. The extradural group (mothers and infants) were metabolically acidaemic relative to c...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/51.4.367
更新日期:1979-04-01 00:00:00
abstract::As the route of breathing and use of airway apparatus such as mask, mouthpiece and noseclip can alter breathing pattern, this study has used the helium dilution method to estimate the effects of mouthpiece and mask breathing on functional residual capacity (FRC) in the supine position, and the change in FRC that occur...
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/76.4.560
更新日期:1996-04-01 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::Relative humidity of air produced by simple compressors used to drive ventilators was measured at different working pressures. At normal working pressures, a relative humidity of 100% was found and condensation occurred, mainly at the high pressure air/oxygen mixer valve. This resulted in blockages and loss of accurac...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/53.5.549
更新日期:1981-05-01 00:00:00
abstract:BACKGROUND:Perioperative neurocognitive disorders (PND) result in long-term morbidity and mortality with no effective interventions available. Because interleukin-6 (IL-6), a pro-inflammatory cytokine, is consistently up-regulated by trauma, including after surgery, we determined whether IL-6 is a putative therapeutic ...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1016/j.bja.2017.11.096
更新日期:2018-03-01 00:00:00
abstract:BACKGROUND:Dexmedetomidine is an α-2-receptor agonist which might be used as an additive to local anaesthetics for various regional anaesthetic techniques. We therefore designed this prospective, double-blinded, controlled volunteer study to investigate the effects of dexmedetomidine as an adjuvant to ropivacaine on pe...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aes400
更新日期:2013-03-01 00:00:00
abstract::We have investigated the effect of volatile anaesthetics on protein synthesis and secretion in Hartley male guinea pig liver slices. The slices (250-300 microns thick) were incubated in sealed roller vials containing Krebs-Henseleit buffer at 37 degrees C under 95% oxygen. Volatile anaesthetics were vaporized in the v...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/68.2.172
更新日期:1992-02-01 00:00:00
abstract:BACKGROUND:Intraneural injection of local anaesthetic agents carries a risk of neurological complications. Early detection of intraneural needle-tip position is very important in the initial phase of injection. Ultrasound (US) characteristics for real-time detection of intraneural injections have been described, but on...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/aes208
更新日期:2012-09-01 00:00:00
abstract::The in vitro halothane and caffeine contracture tests have been performed on muscle tissue from six survivors of the neuroleptic malignant syndrome. The results, which are expressed in accordance with the criteria of the European MH Group, defined five of the subjects as MHN and one patient as MHE. It is concluded tha...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/59.12.1554
更新日期:1987-12-01 00:00:00
abstract:BACKGROUND:The optimal dose of oxytocin at Caesarean section is unclear. Oxytocin may cause adverse cardiovascular effects, including tachycardia and hypotension, whereas an inadequate dose can result in increased uterine bleeding. We compared the effects of two doses of oxytocin in a randomized double-blind trial. ME...
journal_title:British journal of anaesthesia
pub_type: 杂志文章,随机对照试验
doi:10.1093/bja/aen273
更新日期:2008-12-01 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::The relative sensitivity of sympathetic preganglionic and postganglionic axons, B and C fibres, respectively, to two structurally dissimilar local anaesthetics was examined. The concentration of amethocaine (ester-linked tertiary amine) or prilocaine (amide-linked secondary amine) required to reduce the B fibre compou...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/47.11.1135
更新日期:1975-11-01 00:00:00
abstract::Local reactions after i.v. injection of diazepam, flunitrazepam and isotonic saline were studied in patients who received extradural analgesia or general anaesthesia. The frequency of thrombophlebitis on the 1st, 3rd and 5th days after the injection of diazepam was 2.1%, 17.0% and 14.9% respectively, after flunitrazep...
journal_title:British journal of anaesthesia
pub_type: 临床试验,杂志文章
doi:10.1093/bja/52.8.817
更新日期:1980-08-01 00:00:00
abstract:BACKGROUND:The Laryngeal Tube (LT) performs similarly to the classic laryngeal mask airway during controlled ventilation but with an improved airway seal. We compared the laryngeal tube with the ProSeal laryngeal mask airway (PLMA) throughout anaesthesia. METHODS:Thirty-two patients were studied using a randomized cro...
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/aeg239
更新日期:2003-11-01 00:00:00
abstract::Patients with renal failure and undergoing a cadaver renal transplant were found to have plasma concentrations of laudanosine, following the administration of a single bolus dose of atracurium 0.5 mg kg-1, higher than those found in patients without renal failure. Since laudanosine is a known central nervous system st...
journal_title:British journal of anaesthesia
pub_type: 杂志文章
doi:10.1093/bja/57.11.1049
更新日期:1985-11-01 00:00:00