Key result
The IRMA main-stream anaesthetic gas monitor demonstrated a mean bias of -0.125 vol % (limits of agreement -0.41 to 0.16) compared to standard Datex monitoring during low flow anaesthesia.
Why the study?
Does a new main-stream anaesthetic gas monitor (IRMA) accurately measure end-tidal gas concentration compared to standard Datex side-stream monitoring in healthy patients undergoing elective day case anaesthesia?
Observational (n=32)
No
Does a new main-stream anaesthetic gas monitor (IRMA) accurately measure end-tidal gas concentration compared to standard Datex side-stream monitoring in healthy patients undergoing elective day case anaesthesia?
The new main-stream gas monitor IRMA is a clinically acceptable alternative to standard side-stream monitoring for end-tidal anaesthetic gas during routine low flow anaesthesia.
Answers are grounded in this paper and cite their sources.
Supports feasibility of new mainstream monitor in low-flow day-case anaesthesia; leaves open larger validation trials before clinical adoption.
End-tidal anaesthetic gas concentration monitoring during inhalation anaesthesia has become standard of care. Explorative study comparing the end-tidal anaesthetic gas measured by a new main-stream anaesthetic gas monitor (IRMA, Phasein, Stockholm, Sweden) as compared to standard Datex side-stream monitoring during routine low flow anaesthesia Day surgical centre in StockholmThirty two healthy, ASA 1-2, patients undergoing elective day case anaesthesia with low flow 0.2-0.5 L/min. Simultaneous recording of the end-tidal gas concentration during routine day case anaesthesia with low flow sevoflurane or desflurane anaesthesia. The new monitor was found to be clinically acceptable. The mean bias between IRMA and Datex measures -0.125 vol % (± 0.145, limits of agreement were -0.41 – 0.16). The new main stream gas monitor is clinically acceptable alternative for end-tidal anaesthetic gas monitoring during routine anaesthesia with low flow, 0.2-0.5 L/min.
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Kılıç et al. (2010) conducted an observational in Elective day case anaesthesia (n=32). IRMA main-stream anaesthetic gas monitor vs. Datex side-stream monitoring was evaluated on End-tidal anaesthetic gas concentration mean bias (Mean bias -0.125 vol %, 95% CI -0.41 to 0.16). The IRMA main-stream anaesthetic gas monitor demonstrated a mean bias of -0.125 vol % (limits of agreement -0.41 to 0.16) compared to standard Datex monitoring during low flow anaesthesia.
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