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Aanesthetic Agents for Day Surgery - NIHR Health Technology ...

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220<br />

Appendix 18<br />

TABLE 89 Limits of agreement <strong>for</strong> the weights of isoflurane and<br />

sevoflurane<br />

Volatile anaesthetic and area Limits of<br />

agreement (g)<br />

Isoflurane, anaesthetic room –1.4 to 2.2<br />

Isoflurane, theatre –3.2 to 8.1<br />

Sevoflurane, anaesthetic room –1.2 to 2.5<br />

Sevoflurane, theatre –2.1 to 5.7<br />

TABLE 90 Correction factor <strong>for</strong> the Dion estimate of the quantity of volatile anaesthetic used<br />

Volatile anaesthetic and area Mean true Mean Dion Mean difference Correction factor<br />

weight estimate (true weight – (mean difference/<br />

(g) (g) Dion estimate) mean true weight<br />

(g) x 100) (%)<br />

Isoflurane, anaesthetic room 2.3 1.9 0.4 16<br />

Isoflurane, theatre 9.1 6.7 2.0 27<br />

Sevoflurane, anaesthetic room 11.1 10.5 0.6 6<br />

Sevoflurane, theatre 12.6 10.8 1.8 14<br />

TABLE 91 Time over which volatile anaesthetic was given to the patients<br />

Volatile anaesthetic Mean time administered (minutes) 95% CI (n)<br />

Isoflurane, anaesthetic room 2.8 1.9 to 3.7 (10)<br />

Sevoflurane, anaesthetic room 4.5 3.4 to 5.6 (29)<br />

Isoflurane, operating theatre 21.6 7.5 to 35.7 (10)<br />

Sevoflurane, operating theatre 20.6 11.8 to 26.3 (28)

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