Comparison of an infrared anaesthetic agent analyser (Datex-Ohmeda) with refractometry for measurement of isoflurane, sevoflurane and desflurane concentrations

Rudolff, Andrea S.; Moens, Yves; Driessen, Bernd; Ambriskó, Tamás Dezső

doi:10.1111/vaa.12118

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…P E ′CO 2 and isoflurane concentration in these samples were determined using an infrared spectrometer (DX-AJAGA-1 (AGA); Dixtal, Brazil). The anesthetic gas analyzer was calibrated before and during each experiment with room air and three calibration standards containing 0.5, 1.5 and 3% isoflurane (White Martins Gases Industriais SA, Brazil) [ 15 ]. End-tidal isoflurane values were corrected using the linear regression equation generated from the calibration standards; P E ′CO 2 auto-calibration was performed by the infrared spectrometer before and during the study.…”

Section: Methodsmentioning

confidence: 99%

Effects of Methadone on the Minimum Anesthetic Concentration of Isoflurane, and Its Effects on Heart Rate, Blood Pressure and Ventilation during Isoflurane Anesthesia in Hens (Gallus gallus domesticus)

et al. 2016

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The aim of this study was to measure the temporal effects of intramuscular methadone administration on the minimum anesthetic concentration (MAC) of isoflurane in hens, and to evaluate the effects of the isoflurane-methadone combination on heart rate and rhythm, blood pressure and ventilation. Thirteen healthy adult hens weighing 1.7 ± 0.2 kg were used. The MAC of isoflurane was determined in each individual using the bracketing method. Subsequently, the reduction in isoflurane MAC produced by methadone (3 or 6 mg kg-1, IM) was determined by the up-and-down method. Stimulation was applied at 15 and 30 minutes, and at 45 minutes if the bird had not moved at 30 minutes. Isoflurane MAC reduction was calculated at each time point using logistic regression. After a washout period, birds were anesthetized with isoflurane and methadone, 6 mg kg-1 IM was administered. Heart rate and rhythm, respiratory rate, blood gas values and invasive blood pressure were measured at 1.0 and 0.7 isoflurane MAC, and during 45 minutes after administration of methadone once birds were anesthetized with 0.7 isoflurane MAC. Fifteen minutes after administration of 3 mg kg-1 of methadone, isoflurane MAC was reduced by 2 (-9 to 13)% [logistic regression estimate (95% Wald confidence interval)]. Administration of 6 mg kg-1 of methadone decreased isoflurane MAC by 29 (11 to 46)%, 27 (-3 to 56)% and 10 (-8 to 28)% after 15, 30 and 45 minutes, respectively. Methadone (6 mg kg-1) induced atrioventricular block in three animals and ventricular premature contractions in two. Methadone caused an increase in arterial blood pressure and arterial partial pressure of carbon dioxide, while heart rate and pH decreased. Methadone, 6 mg kg-1 IM significantly reduced isoflurane MAC by 30% in hens 15 minutes after administration. At this dose, methadone caused mild respiratory acidosis and increase in systemic blood pressure.

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Section: Methodsmentioning

confidence: 99%

Effects of Methadone on the Minimum Anesthetic Concentration of Isoflurane, and Its Effects on Heart Rate, Blood Pressure and Ventilation during Isoflurane Anesthesia in Hens (Gallus gallus domesticus)

et al. 2016

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“…The spectrophotometer was calibrated daily using room air and three standards of known isoflurane concentrations (0.5%, 1.5% and 3.0%) (Isoflurane, N 2 , O 2 ; White Martins Gases Industriais SA, Brazil). Values measured by the spectrophotometer were corrected by means of linear regression based on the calibration values (Rudolff et al 2014).…”

Section: Anesthesia and Instrumentationmentioning

confidence: 99%

Effects of a single intravenous bolus of fentanyl on the minimum anesthetic concentration of isoflurane in chickens (Gallus gallus domesticus)

Rocha

Escobar

Pypendop

et al. 2017

Veterinary Anaesthesia and Analgesia

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“…3), przechodzących przez próbkę powietrza i zbieranych przez detektor. Na tej podstawie odbywa się pomiar ilościowy i jakościowy (wykrywanie rodzaju anestetyku w zależności od długości pochłanianej fali) (44,45).…”

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Equine general anesthesia monitoring – review of the methods and current knowledge

Drewnowska¹,

Lisowska²,

Turek³

2018

Medycyna Weterynaryjna

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The high anesthetic mortality rate and high number of the postanesthetic side effects in horses generates the need for precise assessment of Central Nervous System depression caused by the anesthetic agents. The factors which influence the degree of CNS depression can be human-dependent (i.e. veterinarian level of education), conditionally human-dependent (i.e. type of surgery performed) or not human-dependent (i.e. breed, individual susceptibility to anesthetics). In order to monitor and assess the level of equine anesthesia, the modified Guedel scale is used currently. There are 3 types of monitoring according to its accuracy: basic, routine and used in special cases. The monitored vital parameters can give either direct or indirect measurement on the cardiovascular and respiratory system during anesthesia. In this paper the types of measurement techniques and the practical use of ECG, pulse, eye signs, arterial blood pressure, body temperature, pulse oximetry, capnography, end tidal anesthetics concentration and blood gases were described. More parameters can be measured, but not all of them can be used in everyday practice, because of the complicated invasive technique. Currently the research are led on direct monitoring of CNS through intraanesthetic EEG analysis..

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Comparison of an infrared anaesthetic agent analyser (Datex-Ohmeda) with refractometry for measurement of isoflurane, sevoflurane and desflurane concentrations

Cited by 11 publications

References 14 publications

Effects of Methadone on the Minimum Anesthetic Concentration of Isoflurane, and Its Effects on Heart Rate, Blood Pressure and Ventilation during Isoflurane Anesthesia in Hens (Gallus gallus domesticus)

Effects of Methadone on the Minimum Anesthetic Concentration of Isoflurane, and Its Effects on Heart Rate, Blood Pressure and Ventilation during Isoflurane Anesthesia in Hens (Gallus gallus domesticus)

Effects of a single intravenous bolus of fentanyl on the minimum anesthetic concentration of isoflurane in chickens (Gallus gallus domesticus)

Equine general anesthesia monitoring – review of the methods and current knowledge

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