Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

150 questions · 163 findings · 19 reviews

No studies found 21 · 12.9%GRADE not reported 48 · 29.4%Very low 34 · 20.9%Low 45 · 27.6%Moderate 15 · 9.2%High 0 · 0%

High-volume evacuation (HVE) vs No HVE

Reduction in contamination of aerosols on operator's face shield/mask (RCTs) · People undergoing aerosol-generating procedures (AGPs) in a dental setting

High-volume evacuation (HVE) showed no clear difference in reduction in contamination of aerosols on operator's face… compared with no HVE; GRADE not reported.

1 finding from 1 review

Intervention not reported

Co‐operation during induction ‐ Mask introduction/exposure (Mask) ICC (number of children compliant) · children

It is very uncertain whether the intervention changes co‐operation during induction ‐ Mask introduction/exposure (Mask)… (very low certainty).

1 finding from 1 review

ProSeal vs Classic laryngeal mask airway (LMA)

Inadequate oxygenation (SaO₂ < 90% on peripheral oxygen saturation) · adult patients (18 years of age and older) for positive pressure ventilation undergoing elective surgery

It is very uncertain whether proSeal changes inadequate oxygenation (SaO₂ < 90% on peripheral oxygen saturation) compared with classic laryngeal mask airway (LMA) (very low certainty).

1 finding from 1 review

ProSeal vs Classic laryngeal mask airway (LMA)

Sore throat · adult patients (18 years of age and older) for positive pressure ventilation undergoing elective surgery

ProSeal showed no clear difference in sore throat compared with classic laryngeal mask airway (LMA) (low certainty).

1 finding from 1 review

ProSeal vs Classic laryngeal mask airway (LMA)

Regurgitation · adult patients (18 years of age and older) for positive pressure ventilation undergoing elective surgery

ProSeal showed no clear difference in regurgitation compared with classic laryngeal mask airway (LMA) (low certainty).

1 finding from 1 review

N95 respirators vs medical/surgical masks

Viral respiratory illness ‐ laboratory‐confirmed influenza · general population and healthcare workers

N95 respirators showed no clear difference in viral respiratory illness ‐ laboratory‐confirmed influenza compared with medical/surgical masks (moderate certainty).

1 finding from 1 review