Response time of the Narkotest anesthetic gas monitor.

Abstract:

:Response time (RT) of the Narkotest anesthetic gas monitor was measured for 7 inhalation anesthetics, using a 5 L/min fresh gas flow (FGF). Time to 63 percent of maximum response (RT63) and to 95 percent of maximum response (RT95) was directly related to rubber/gas and oil/gas partition coefficients. RT95 ranged from 7 seconds for N2O to 843 seconds for methoxyflurane. RT measured at 0.5 L/min FGF was markedly prolonged over RT at 5 L/min. When the Narkotest was placed on the expiratory limbs of circle-absorber breathing circuits, the difference between the calibrated Narkotest reading (Fn) and the mixed expired circuit concentration (Fc) was shown to depend on the rate of increase of the circuit concentration.

journal_name

Anesth Analg

journal_title

Anesthesia and analgesia

authors

Velazquez JL,Feingold A,Walther P

doi

10.1213/00000539-197705000-00016

subject

Has Abstract

pub_date

1977-05-01 00:00:00

pages

395-7

issue

3

eissn

0003-2999

issn

1526-7598

journal_volume

56

pub_type

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