Inhaled Anesthetic Delivery Systems

Brockwell, Russell C.; Andrews, Jeff J.

doi:10.1016/b978-0-443-06959-8.00025-x

Cited by 21 publications

(20 citation statements)

References 131 publications

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“…Furthermore, modern integrated anesthesia workstations are designed to give complete anesthesia with respiratory gas delivery and monitoring system which helps us to use low-flow anesthesia safely. [ 4 5 6 ]…”

Section: Introductionmentioning

confidence: 99%

Sevoflurane in low-flow anesthesia using “equilibration point”

et al. 2016

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Context:While giving low-flow anesthesia, it is a routine practice to give fixed duration of initial high-flow. This study was conducted to show the use of equilibration point as changeover point from initial high-flow to low-flow.Aims:It was to compare the use of equilibration point, hemodynamics, end-tidal agent concentration, recovery time, and recovery score between isoflurane and sevoflurane.Settings and Design:It was a prospective randomized study conducted on 100 patients who were admitted for elective surgery expected to be < 2 h duration.Materials and Methods:Patients were randomly assigned to one of the two groups of 50 each. Group I received isoflurane and Group S sevoflurane as an inhalational agent.Statistical Analysis:The observations obtained in both the groups were recorded and compared. Analysis was done using unpaired t-test and Chi-square test.Results:Hemodynamic parameters were comparable in both the groups. The mean equilibration times obtained for sevoflurane and isoflurane were 8.22 ± 1.060 min and 17.24 ± 10.2 min, respectively. The drift in end-tidal agent concentration over time was less in sevoflurane group. Mean recovery time was 7.92 ± 1.56 min in the sevoflurane group and 12.89 ± 3.45 min in the isoflurane group (P = 0.001). There was no significant difference between intraoperative and postoperative complications.Conclusion:Use of equilibration time of the volatile anesthetic agent as a changeover point, from high-flow to low-flow, can help us to use circle system with low-flow anesthesia in a more efficient way, especially with newer anesthetics such as sevoflurane.

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Section: Introductionmentioning

confidence: 99%

Sevoflurane in low-flow anesthesia using “equilibration point”

et al. 2016

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“…Consideration also should be given to changing the CO 2 absorbent, since dessicated absorbents (especially Baralyme; Chemetron Medical Division, Allied Healthcare, St. Louis, MO, USA) degrade inhaled anesthetics to CO. In our case, we did change the absorbent but it was an unlikely contributor to the COHb level because our anesthesia machine had been turned off without gas flow through the absorbent before the case, our chosen volatile anesthetic (sevoflurane) has a lower magnitude of CO production than desflurane, and our absorbent was soda lime instead of Baralyme [19].…”

Section: Discussionmentioning

confidence: 87%

Anesthesia implications of waterpipe use

Kesner

Ramaiah

Hemmer

et al. 2012

Journal of Clinical Anesthesia

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“…This is achieved by isolating the fresh gas flow in such a way that it does not enter the breathing circuit but is diverted to the reservoir bag during the inspiratory phase of mechanical ventilation. The main disadvantage with ventilators that use FGD is the possibility of entrainment of room air into the patient's breathing circuit, when the inflow into the ventilator piston is inadequate during the expiratory phase [2]. In our case, removal of soda lime absorber led to inadequate return of volume from both the reservoir and expiratory gases, and consequent creation of a negative pressure B2 cm H 2 O in the breathing circuit.…”

Section: Discussionmentioning

confidence: 92%

“…In our case, removal of soda lime absorber led to inadequate return of volume from both the reservoir and expiratory gases, and consequent creation of a negative pressure B2 cm H 2 O in the breathing circuit. This led to ambient air entrainment into the breathing circuit and dilution of the inspired gas mixture [2][3][4]. The negative pressure relief (NPR) valve in the device is intended to avoid fall in tidal volume.…”

Section: Discussionmentioning

confidence: 99%

Fall in inspired oxygen and anaesthetic agent concentrations during change of soda lime absorber

Vinay

Gopalakrishna

2014

J Clin Monit Comput

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Following an episode of reduction in inspired oxygen concentration (FiO(2)) and inhalational agent concentration (Fi agent) during the changing of a soda lime absorber, We conducted an in vitro experiment to understand the impact of disconnection of the absorber on inspired gas dilution at different fresh gas flows. We found that both in Dräger Fabius GS and Primus anaesthesia work stations, disconnection of the absorber caused progressive reduction in FiO(2) and Fi agent as the FGF was decreased. The operating principle of fresh gas decoupling (FGD) valve is a potential source of this complication, which must be kept in mind while changing the soda lime during the course of surgery where an anaesthetic work stations utilizing FGD valves are used.

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Inhaled Anesthetic Delivery Systems

Cited by 21 publications

References 131 publications

Sevoflurane in low-flow anesthesia using “equilibration point”

Sevoflurane in low-flow anesthesia using “equilibration point”

Anesthesia implications of waterpipe use

Fall in inspired oxygen and anaesthetic agent concentrations during change of soda lime absorber

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