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

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12<br />

Literature review<br />

intermediate and late recovery. Ong and<br />

co-workers 106 also compared propofol total<br />

intravenous anaesthesia (TIVA) with sevoflurane<br />

total inhalational anaesthesia. There was no<br />

difference with respect to early and intermediate<br />

recovery, but N 2O was given to one group (sevoflurane)<br />

only. Fish and co-workers 72 also found<br />

no difference with respect to early and intermediate<br />

recovery. In the final study, which<br />

examined propofol and sevoflurane induction<br />

of anaesthesia, no measurements of recovery<br />

were made. 125<br />

Thiopentone and sevoflurane<br />

One study 107 compared these two agents <strong>for</strong> induction.<br />

Sevoflurane was superior to thiopentone in<br />

terms of the number of patients able to walk unaided<br />

after 30 minutes. There was a higher incidence<br />

of arrhythmias in the thiopentone group.<br />

Thiopentone and desflurane<br />

One study 73 compared these two agents <strong>for</strong><br />

induction. Four separate patient groups were<br />

included, and in two groups the only difference<br />

was the induction agent, thiopentone 5 mg/kg or<br />

desflurane. Thiopentone was inferior to desflurane<br />

with respect to intermediate recovery and choice<br />

reaction time, but not with respect to critical<br />

flicker fusion threshold.<br />

Propofol and desflurane<br />

Five studies were found. 51,90,116,133,137 Apfelbaum and<br />

co-workers 51 studied 20 volunteers, each of whom<br />

received a different anaesthetic technique on<br />

four separate occasions. Two of these techniques<br />

differed only with respect to induction of anaesthesia<br />

(propofol 2.5 mg/kg or desflurane 3%),<br />

desflurane being used <strong>for</strong> maintenance. With<br />

respect to early and intermediate recovery, those<br />

who received desflurane <strong>for</strong> induction recovered<br />

more rapidly. Late recovery measurements showed<br />

no differences between the groups. The psychomotor<br />

tests at 1 hour showed a number of differences,<br />

but the first group was better at some tests<br />

and the second at others, and there was no difference<br />

in the remainder. Psychomotor tests beyond<br />

1 hour showed no difference between the groups.<br />

A similar set of four anaesthetic techniques was<br />

examined in the remaining studies. There was no<br />

difference between the propofol induction and<br />

desflurane induction groups with respect to early,<br />

intermediate, late or psychomotor recoveries.<br />

Maintenance of anaesthesia<br />

Isoflurane and sevoflurane<br />

Four studies compared these two agents <strong>for</strong><br />

maintenance. 68,104,108,124 In two studies 68,108 propofol<br />

was used <strong>for</strong> induction and fentanyl <strong>for</strong> analgesia.<br />

In both studies, early, intermediate and psychomotor<br />

studies showed sevoflurane to be superior<br />

to isoflurane, although there was no difference<br />

with respect to late recovery. In a third study, 104<br />

involving patients who received thiopentone <strong>for</strong><br />

induction, there was no difference between<br />

isoflurane and sevoflurane. The fourth study 124<br />

used the same agent (sevoflurane or isoflurane)<br />

<strong>for</strong> induction of anaesthesia by single vital<br />

capacity breath, and demonstrated no difference<br />

between sevoflurane and isoflurane.<br />

Isoflurane and halothane<br />

These two agents were compared in two<br />

studies. 58,109 All patients received propofol <strong>for</strong><br />

induction of anaesthesia. No difference was found<br />

in the results of psychomotor tests between the<br />

patients who received isoflurane and those who<br />

received halothane.<br />

Isoflurane and enflurane<br />

Three studies 62,82,109 compared this pair of agents<br />

<strong>for</strong> maintenance of anaesthesia following propofol<br />

<strong>for</strong> induction. Pollard and co-workers 109 found that<br />

enflurane was better than isoflurane in terms of<br />

psychomotor recovery. Chung and co-workers 62<br />

found no difference with respect to early, intermediate<br />

or late recovery. Hovorka and co-workers 82<br />

found no difference in terms of PONV.<br />

Enflurane and halothane<br />

Three studies compared these agents <strong>for</strong><br />

maintenance of anaesthesia. 55,58,109 Pollard and<br />

co-workers 109 used propofol <strong>for</strong> induction.<br />

Those patients who received enflurane recovered<br />

more rapidly than those who received halothane,<br />

although only psychomotor tests were used.<br />

Biswas and Hatch 55 used thiopentone <strong>for</strong><br />

induction. Enflurane was better than halothane<br />

with respect to early and intermediate recovery,<br />

but no difference was found with respect to<br />

psychomotor recovery. Carter and co-workers 58<br />

standardised induction and used propofol. No<br />

difference in recovery was found between<br />

enflurane and halothane.<br />

Sevoflurane and desflurane<br />

These two maintenance agents were compared in<br />

three studies. 98,100,130 All studies used propofol <strong>for</strong><br />

induction of anaesthesia and also used an opioid<br />

(fentanyl in the first two, and alfentanil in the<br />

third). All patients in the first two studies received<br />

N 2O, whereas none did so in the third study. Two<br />

studies 98,100 showed early recovery from desflurane<br />

to be faster than sevoflurane, but in the third study<br />

there was no difference. There was no difference

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