Laffon 1994.
| Methods | Prospective, randomized study | |
| Participants | N = 60, ASA I‐II, age 4 months to 12 years, scheduled for minor urologic or upper abdominal surgery | |
| Interventions | Type of LMA: LMA Classic Early removal ‐ patients received halothane at twice MAC and oxygen for 5 minutes before the LMA was removed Late removal ‐ The LMA was removed after the patients opened their eyes or mouths, demonstrated satisfactory volume, respiratory rate or facial grimace |
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| Outcomes | Laryngospasm Coughing SpO2 before removal of the LMA and lowest SpO2 after removal of the LMA Airway obstruction Apnoea Bronchospasm Arrhythmias |
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| Notes | Induction & maintenance ‐ N2O + O2 + halothane and spontaneous respiration | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | "Patients were randomly divided into two groups" |
| Allocation concealment (selection bias) | Unclear risk | COMMENT ‐ No information on the method of allocation concealment |
| Blinding (performance bias and detection bias) Of outcome assessor to all outcomes | High risk | Not done |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | COMMENT ‐ 60 patients were randomized and their outcomes reported |
| Selective reporting (reporting bias) | Low risk | COMMENT ‐ Though no explicit statement, the outcomes mentioned in methodology have been reported |