Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

567 questions · 573 findings · 37 reviews · Headline outcomes only

No studies found 89 · 15.5%GRADE not reported 156 · 27.2%Very low 140 · 24.4%Low 127 · 22.2%Moderate 47 · 8.2%High 14 · 2.4%

PLMA vs tracheal tube

Episodes of hypoxaemia in PACU < 92% oxygen saturation · airway management during general anaesthesia in obese participants

PLMA probably leads to lower episodes of hypoxaemia in PACU < 92% oxygen saturation compared with tracheal tube (moderate certainty).

1 finding from 1 review

PLMA vs tracheal tube

Laryngospasm/bronchoconstriction between induction and recovery · airway management during general anaesthesia in obese participants

It is very uncertain whether PLMA changes laryngospasm/bronchoconstriction between induction and recovery compared with tracheal tube (very low certainty).

1 finding from 1 review

Combined spinal‐epidural vs high‐dose spinal

Number of women requiring a repeat regional block or a general anaesthetic as a result of failure to establish adequate initial blockade · women undergoing caesarean section

Combined spinal‐epidural showed no clear difference in number of women requiring a repeat regional block or a general… compared with high‐dose spinal (low certainty).

1 finding from 1 review

Combined spinal‐epidural vs low‐dose spinal

Number of women requiring a repeat regional block or a general anaesthetic as a result of failure to establish adequate initial blockade · women undergoing caesarean section

Combined spinal‐epidural showed no clear difference in number of women requiring a repeat regional block or a general… compared with low‐dose spinal (low certainty).

1 finding from 1 review