Priming of Anesthesia Circuit with Xenon for Closed Circuit Anesthesia

: Xenon is an inert gas with a practical anesthetic potency (1 MAC = 71%). Because it is very expensive, the use of closed circuit anesthesia technique is ideal for the conduction of xenon anesthesia. Here we describe our methods of starting closed circuit anesthesia without excessive waste of xenon...

Full description

Saved in:
Bibliographic Details
Published in:Artificial organs 1997-01, Vol.21 (1), p.70-72
Main Authors: Saito, Hayato, Saito, Mieko, Goto, Takahisa, Morita, Shigeho
Format: Article
Language:English
Subjects:
Anesthesia, Closed-Circuit - economics
Anesthesia, Closed-Circuit - standards
Anesthesia, Closed-Circuit - trends
Anesthetics, Inhalation
Closed circuit anesthesia
Cost-Benefit Analysis
Humans
Oxygen - administration & dosage
Xenon
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:: Xenon is an inert gas with a practical anesthetic potency (1 MAC = 71%). Because it is very expensive, the use of closed circuit anesthesia technique is ideal for the conduction of xenon anesthesia. Here we describe our methods of starting closed circuit anesthesia without excessive waste of xenon gas. We induce anesthesia with intravenous agents, and after endotracheal intubation, denitrogenate the patient for approximately 30 min with a high flow of oxygen. This is done to minimize accumulation of nitrogen in the anesthesia circuit during the subsequent closed‐circuit anesthesia with xenon. Anesthesia is maintained with an inhalational anesthetic during this period. Then, we discontinue the inhalational agent and start xenon. For this transition, we feel it is unacceptable to simply administer xenon at a high flow until the desired endtidal concentration is reached because it is too costly. Instead. we set up another machine with its circuit filled in advance (i.e., primed) with at least 60% xenon in oxygen and switch the patient to this machine. To prime the circuit, we push xenon using a large syringe into a circuit, which was prefilled with oxygen. Oxygen inside the circuit is pushed out before it is mixed with xenon, and xenon waste will thus be minimized. In this way, we can achieve close to 1 MAC from the beginning of xenon anesthesia, and thereby minimize the risk of light anesthesia and awareness during transition from deni‐trogenation to closed‐circuit xenon anesthesia.
ISSN:0160-564X
1525-1594
DOI:10.1111/j.1525-1594.1997.tb00701.x