Prediction of inspired oxygen concentration within a circle anaesthetic system.

Abstract:

:Fresh gas flows of nitrous oxide, oxygen and halothane at 6, 3, 2 and 1 litre/min were introduced into a circle absorber system. Spontaneous respiration and IPPV were studied and a regression of inspired on delivered oxygen concentration % was calculated. The difference between delivered and inspired oxygen concentration % was increased by decreasing the fresh gas flow and by decreasiing the proportion of oxygen in that flow, especially during IPPV. Circuits designed to allow a maximum overflow of alveolar gas provided a greater inspired oxygen concentration. The patients' height and weight were related to the scatter of inspired values observed at 1 litre/min of fresh gas flow with IPPV.

journal_name

Br J Anaesth

authors

Raymond JA

doi

10.1093/bja/48.3.217

subject

Has Abstract

pub_date

1976-03-01 00:00:00

pages

217-23

issue

3

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)50697-2

journal_volume

48

pub_type

杂志文章
  • Actions of the hypnotic anaesthetic, dexmedetomidine, on noradrenaline release and cell firing in rat locus coeruleus slices.

    abstract::We have examined the effects of the highly selective alpha 2-adrenoceptor agonist, dexmedetomidine, on noradrenaline release and cell firing in isolated, superfused slices of rat locus coeruleus. Dexmedetomidine decreased both noradrenaline release and cell firing rate in a concentration-dependent fashion, with an EC5...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/71.3.447

    authors: Jorm CM,Stamford JA

    更新日期:1993-09-01 00:00:00

  • Tapentadol potentiates descending pain inhibition in chronic pain patients with diabetic polyneuropathy.

    abstract:BACKGROUND:Tapentadol is an analgesic agent for treatment of acute and chronic pain that activates the µ-opioid receptor combined with inhibition of neuronal norepinephrine reuptake. Both mechanisms are implicated in activation of descending inhibitory pain pathways. In this study, we investigated the influence of tape...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章,随机对照试验

    doi:10.1093/bja/aeu056

    authors: Niesters M,Proto PL,Aarts L,Sarton EY,Drewes AM,Dahan A

    更新日期:2014-07-01 00:00:00

  • Determination of cardiac output by ultrasound dilution technique in infants and children: a validation study against direct Fick principle.

    abstract:BACKGROUND:In critically ill children, monitoring of cardiac output (CO) is essential to guide haemodynamic management and facilitate cardiovascular therapy. The ultrasound dilution technique (UDT), a novel minimally invasive indicator method, was recently introduced to determine CO. We validated UDT against the 'gold ...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/aet382

    authors: Boehne M,Baustert M,Paetzel V,Köditz H,Schoof S,Happel CM,Bertram H

    更新日期:2014-03-01 00:00:00

  • Nausea and vomiting after fast-track cardiac anaesthesia.

    abstract:BACKGROUND:The aim of this study was to determine the prevalence of postoperative nausea and vomiting (PONV) after fast-track cardiac anaesthesia, risk factors for PONV and its influence on the length of stay in the intensive care unit (ICU). METHODS:A prospective study was performed in the cardiothoracic ICU (CTICU) ...

    journal_title:British journal of anaesthesia

    pub_type: 临床试验,杂志文章

    doi:10.1093/bja/aeg166

    authors: Kogan A,Eidelman LA,Raanani E,Orlov B,Shenkin O,Vidne BA

    更新日期:2003-08-01 00:00:00

  • Pharmacokinetics and pharmacodynamics of ketamine enantiomers in surgical patients using a stereoselective analytical method.

    abstract::In a randomized, double-blind study, we have examined the stereoselective disposition and pharmacodynamic characteristics of ketamine in surgical patients after i.v. administration of S(+)-ketamine 1 mg/kg body weight (25 patients) or racemic ketamine 2 mg/kg body weight (25 patients). S(+)-Ketamine was not inverted 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/70.6.666

    authors: Geisslinger G,Hering W,Thomann P,Knoll R,Kamp HD,Brune K

    更新日期:1993-06-01 00:00:00

  • Association between intraoperative electroencephalographic suppression and postoperative mortality.

    abstract:BACKGROUND:Low bispectral index values frequently reflect EEG suppression and have been associated with postoperative mortality. This study investigated whether intraoperative EEG suppression was an independent predictor of 90 day postoperative mortality and explored risk factors for EEG suppression. METHODS:This obse...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章,多中心研究,随机对照试验

    doi:10.1093/bja/aeu105

    authors: Willingham M,Ben Abdallah A,Gradwohl S,Helsten D,Lin N,Villafranca A,Jacobsohn E,Avidan M,Kaiser H

    更新日期:2014-12-01 00:00:00

  • Pharmacokinetics of atracurium besylate in healthy patients (after a single i.v. bolus dose).

    abstract::The plasma decay of atracurium besylate was examined in two groups of six patients. Group I received atracurium 0.6 mg kg-1 and group II 0.3 mg kg-1 as a single bolus dose i.v. The plasma concentrations were measured by high performance liquid chromatography. An individual two-compartment pharmacokinetic model was use...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/55.2.113

    authors: Ward S,Neill EA,Weatherley BC,Corall IM

    更新日期:1983-02-01 00:00:00

  • Prophylactic ondansetron does not improve patient satisfaction in women using PCA after Caesarean section.

    abstract::Eighty-one consenting women undergoing elective Caesarean section under spinal anaesthesia were randomly divided into two groups. In Group O patients, ondansetron 4 mg was given intravenously at the end of the surgery and 8 mg added to the morphine solution in the PCA syringe. Patients in Group P received only morphin...

    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/87.3.502

    authors: Cherian VT,Smith I

    更新日期:2001-09-01 00:00:00

  • Cryoprecipitate therapy.

    abstract::Cryoprecipitate, originally developed as a therapy for patients with antihaemophilic factor deficiency, or haemophilia A, has been in use for almost 50 yr. However, cryoprecipitate is no longer administered according to its original purpose, and is now most commonly used to replenish fibrinogen levels in patients with...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章,评审

    doi:10.1093/bja/aeu158

    authors: Nascimento B,Goodnough LT,Levy JH

    更新日期:2014-12-01 00:00:00

  • Effects of chronic angiotensin II receptor antagonist and angiotensin-converting enzyme inhibitor treatments on neurohormonal levels and haemodynamics during cardiopulmonary bypass.

    abstract:BACKGROUND:Chronic treatment with renin-angiotensin system (RAS) antagonists frequently causes deleterious hypotension during anaesthesia. We compared the effects of angiotensin II receptor antagonists (ARA) and angiotensin-converting enzyme inhibitors (ACEI) on neurohormonal levels and haemodynamics during cardiopulmo...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/ael268

    authors: Oh YJ,Lee JH,Nam SB,Shim JK,Song JH,Kwak YL

    更新日期:2006-12-01 00:00:00

  • Low-dose clonidine infusion during labour.

    abstract::In this study, we have compared two different doses of clonidine (bolus of 25 micrograms and infusion of 19 micrograms h-1; bolus of 50 micrograms and infusion of 37 micrograms h-1, both added to 0.03% bupivacaine) with a control group of 0.03% bupivacaine alone. The study was performed in a randomized, double-blind m...

    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/83.2.257

    authors: Tremlett MR,Kelly PJ,Parkins J,Hughes D,Redfern N

    更新日期:1999-08-01 00:00:00

  • Althesin, ketamine and methohexitone at pressure--duration of action of a single i.v. dose.

    abstract::General anaesthesia for emergency surgery in a pressurized habitat is likely to involve the use of i.v. agents. The anaesthetic property of such agents is known to be antagonized by pressure, but the effect on their duration of action is not easily predicted. The recovery of mice from a single i.v. dose of Althesin, k...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/53.5.455

    authors: Shearer AJ,Ross JA,Manson HJ

    更新日期:1981-05-01 00:00:00

  • Elective use of supraglottic airway devices for primary airway management in children with difficult airways.

    abstract:BACKGROUND:Supraglottic airways (SGAs) have an established role in airway management of difficult airways in both adults and children. However, there are limited data regarding the use of SGAs for primary airway management in children. The aim of this study is to assess the success rates and adverse events related to t...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/aet411

    authors: Jagannathan N,Sequera-Ramos L,Sohn L,Wallis B,Shertzer A,Schaldenbrand K

    更新日期:2014-04-01 00:00:00

  • Laparoscopy: blood-gas values and minor sequelae associated with three techniques based on isoflurane.

    abstract::Three anaesthetic techniques based on isoflurane were compared in outpatients undergoing laparoscopy. Sixty healthy patients were randomly allocated to receive isoflurane via mask (spontaneous respiration), via tracheal tube (spontaneous respiration) or via tracheal tube with controlled ventilation. Moderate hypercarb...

    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/59.2.189

    authors: Kenefick JP,Leader A,Maltby JR,Taylor PJ

    更新日期:1987-02-01 00:00:00

  • Effects of diazepam and ketamine administered individually or in combination on regional rates of glucose utilization in rat brain.

    abstract::The effects of diazepam, which acts at GABAA receptors to enhance the effects of GABA, and ketamine, a non-competitive N-methyl-D-aspartate receptor antagonist, on local rates of cerebral glucose utilization (ICMRglc) were examined in unrestrained rats. Four groups were studied: vehicle-injected controls; and ketamine...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/82.4.596

    authors: Eintrei C,Sokoloff L,Smith CB

    更新日期:1999-04-01 00:00:00

  • Relationship between severe obesity and depth to the cricothyroid membrane in third-trimester non-labouring parturients: a prospective observational study.

    abstract:BACKGROUND:Severely obese parturients have increased 'cannot intubate, cannot oxygenate' risk during Caesarean section under general anaesthesia. Front-of-neck access (FONA) at the cricothyroid membrane (CTM) is definitive management; however, attempted FONA can fail. Point-of-care ultrasonography may provide useful in...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1016/j.bja.2018.02.010

    authors: Gadd K,Wills K,Harle R,Terblanche N

    更新日期:2018-05-01 00:00:00

  • Covert stroke after non-cardiac surgery: a prospective cohort study.

    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

    authors: Mrkobrada M,Hill MD,Chan MT,Sigamani A,Cowan D,Kurz A,Sessler DI,Jacka M,Graham M,Dasgupta M,Dunlop V,Emery DJ,Gulka I,Guyatt G,Heels-Ansdell D,Murkin J,Pettit S,Sahlas DJ,Sharma M,Sharma M,Srinathan S,St John P

    更新日期:2016-08-01 00:00:00

  • Selective depression by alfentanil of group III and IV somatosympathetic reflexes in the dog.

    abstract::The effect of alfentanil on sympathetic reflexes evoked by supramaximal electrical stimulation of the radial nerve has been observed in five dogs anaesthetized with alpha-chloralose, paralysed with suxamethonium and artificially ventilated. In five dogs during the infusion of alfentanil at a rate of 20 micrograms kg-1...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/61.4.441

    authors: Swenzen GO,Chakrabarti MK,Sapsed-Byrne S,Whitwam JG

    更新日期:1988-10-01 00:00:00

  • Prediction of fluid responsiveness in patients during cardiac surgery.

    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

    authors: Rex S,Brose S,Metzelder S,Hüneke R,Schälte G,Autschbach R,Rossaint R,Buhre W

    更新日期:2004-12-01 00:00:00

  • Cardiovascular and neuromuscular effects of dimethyl tubocurarine in anaesthetized cats and rhesus monkeys.

    abstract::Intravenous dose-response relationships for dimethyl tubocurarine showed that vagal blockade only became appreciable (50-83%) at doses 8-16 times those sufficient for full neuromuscular paralysis in anaesthetized cats (0.0625 mg/kg) and rhesus monkeys (0.125 mg/kg); heart rate was unchanged. Sympathetic function was u...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/48.9.847

    authors: Hughes R,Chapple DJ

    更新日期:1976-09-01 00:00:00

  • Gram staining of protected pulmonary specimens in the early diagnosis of ventilator-associated pneumonia.

    abstract::We evaluated prospectively the use of Gram staining of protected pulmonary specimens to allow the early diagnosis of ventilator-associated pneumonia (VAP), compared with the use of 60 bronchoscopic protected specimen brushes (PSB) and 126 blinded plugged telescopic catheters (PTC) obtained from 134 patients. Gram stai...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/85.5.735

    authors: Mimoz O,Karim A,Mazoit JX,Edouard A,Leprince S,Nordmann P

    更新日期:2000-11-01 00:00:00

  • Premedication with butorphanol. A comparison with morphine.

    abstract::A blind comparison was made of butorphanol 2 mg with morphine 10 mg i.m. as the sole premedication in four groups, each of 10 women, undergoing total abdominal hysterectomy. On both subjective and objective grounds, butorphanol was as effective as morphine with the advantage of fewer unwanted side-effects, although on...

    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/56.4.363

    authors: Laffey DA,Kay NH

    更新日期:1984-04-01 00:00:00

  • Impact of phenylephrine administration on cerebral tissue oxygen saturation and blood volume is modulated by carbon dioxide in anaesthetized patients.

    abstract:BACKGROUND:Multiple studies have shown that cerebral tissue oxygen saturation (Sct(O(2))) is decreased after phenylephrine treatment. We hypothesized that the negative impact of phenylephrine administration on Sct(O(2)) is affected by arterial blood carbon dioxide partial pressure (Pa(CO(2))) because CO(2) is a powerfu...

    journal_title:British journal of anaesthesia

    pub_type: 临床试验,杂志文章

    doi:10.1093/bja/aes023

    authors: Meng L,Gelb AW,Alexander BS,Cerussi AE,Tromberg BJ,Yu Z,Mantulin WW

    更新日期:2012-05-01 00:00:00

  • Excitatory and inhibitory synaptic mechanisms in anaesthesia.

    abstract::To understand the cellular and molecular basis of the anaesthetic state, it is important to remember that, in the intact CNS, synapses operate within elaborate nerve networks. From the data presented above, it is evident that block of impulse conduction in presynaptic fibres does not explain the effects of most anesth...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章,评审

    doi:10.1093/bja/71.1.134

    authors: Pocock G,Richards CD

    更新日期:1993-07-01 00:00:00

  • Haemodynamic effects from aortocaval compression at different angles of lateral tilt in non-labouring term pregnant women.

    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

    authors: Lee SW,Khaw KS,Ngan Kee WD,Leung TY,Critchley LA

    更新日期:2012-12-01 00:00:00

  • Midlatency auditory evoked potentials in children: effect of age and general anaesthesia.

    abstract:BACKGROUND:Midlatency auditory evoked potentials (MLAEP) are a promising tool for monitoring suppression of sensory processing during anaesthesia and might help to avoid awareness. MLAEP in children are different to those in adults and the exact changes during general anaesthesia are unknown. METHODS:In 49 children of...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/aem267

    authors: Daunderer M,Feuerecker MS,Scheller B,Pape NB,Schwender D,Kuhnle GE

    更新日期:2007-12-01 00:00:00

  • Cerebrovascular effects of isoflurane in man. Intracranial pressure and middle cerebral artery flow velocity.

    abstract::Twelve hydrocephalic patients undergoing hydrodynamic studies and shunt procedures during general anaesthesia were subjected to short term observations of the cerebrovascular effects of isoflurane. Intraventricular pressure (IVP), arterial pressure (AP); cerebral perfusion pressure (CPP = AP-IVP), end-tidal PCO2, Cere...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/59.10.1208

    authors: Lundar T,Lindegaard KF,Refsum L,Rian R,Nornes H

    更新日期:1987-10-01 00:00:00

  • Propofol attenuates myocardial lipid peroxidation during coronary artery bypass grafting surgery.

    abstract:BACKGROUND:Propofol can scavenge free radicals because it has a chemical structure similar to antioxidants. METHODS:We examined if free radical scavenging occurs with propofol during CABG operations. We studied 24 patients undergoing CABG surgery for triple vessel disease, randomized into two groups. After induction o...

    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/aef173

    authors: Sayin MM,Ozatamer O,Taşöz R,Kilinç K,Unal N

    更新日期:2002-08-01 00:00:00

  • Study of the possible interaction between fentanyl and propofol using a computer-controlled infusion of propofol.

    abstract::A computer-controlled infusion of propofol designed to achieve a target blood concentration of propofol 3 microgram ml-1 was used to investigate the possibility of an interaction between propofol and fentanyl in 32 patients undergoing body surface surgery. In 16 patients who were not receiving a neuromuscular blocker ...

    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/64.2.142

    authors: Dixon J,Roberts FL,Tackley RM,Lewis GT,Connell H,Prys-Roberts C

    更新日期:1990-02-01 00:00:00

  • Antioxidants that protect mitochondria reduce interleukin-6 and oxidative stress, improve mitochondrial function, and reduce biochemical markers of organ dysfunction in a rat model of acute sepsis.

    abstract:BACKGROUND:Sepsis-induced organ failure is the major cause of death in critical care units, and is characterized by a massive dysregulated inflammatory response and oxidative stress. We investigated the effects of treatment with antioxidants that protect mitochondria (MitoQ, MitoE, or melatonin) in a rat model of lipop...

    journal_title:British journal of anaesthesia

    pub_type: 杂志文章

    doi:10.1093/bja/aes577

    authors: Lowes DA,Webster NR,Murphy MP,Galley HF

    更新日期:2013-03-01 00:00:00