What do systematic reviews say?

Low tidal volume vs high tidal volume

Low tidal volume showed no clear difference in mortality compared with high tidal volume (low certainty).

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  RR 0.8 [0.42, 1.53]
  12 studies · 1207 participants
  Low

Low tidal volume vs high tidal volume

Low tidal volume probably leads to lower pneumonia compared with high tidal volume (moderate certainty).

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  RR 0.45 [0.25, 0.82]
  7 studies · 778 participants
  Moderate

Low tidal volume vs high tidal volume

Low tidal volume probably leads to lower need for postoperative non‐invasive ventilatory support compared with high tidal volume (moderate certainty).

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  RR 0.31 [0.15, 0.64]
  3 studies · 506 participants
  Moderate

Low tidal volume vs high tidal volume

Low tidal volume probably leads to lower need for postoperative invasive ventilatory support compared with high tidal volume (moderate certainty).

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  RR 0.33 [0.14, 0.77]
  11 studies · 957 participants
  Moderate

Low tidal volume vs high tidal volume

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  5 studies · 898 participants
  Low

Low tidal volume vs high tidal volume

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  14 studies · 1298 participants
  Low

Low tidal volume vs high tidal volume

It is very uncertain whether low tidal volume changes barotrauma: pneumothorax compared with high tidal volume (very low certainty).

• Intraoperative use of low volume ventilation to decrease postoperative mortality, mechanical ventilation, lengths of… 2018 · Cochrane Headline outcomes only
  RR 1.77 [0.52, 5.99]
  5 studies · 708 participants
  Very low

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

It is very uncertain whether PEEP changes postoperative mortality compared with zero end‐expiratory pressure (ZEEP) during mechanical ventilation (very low certainty).

• Positive end‐expiratory pressure (PEEP) during anaesthesia for prevention of mortality and postoperative pulmonary… 2014 · Cochrane Headline outcomes only
  RR 0.97
  6 studies · 268 participants
  Very low

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

• Positive end‐expiratory pressure (PEEP) during anaesthesia for prevention of mortality and postoperative pulmonary… 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 80 participants
  Very low

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

• Positive end‐expiratory pressure (PEEP) during anaesthesia for prevention of mortality and postoperative pulmonary… 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 80 participants
  Very low

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

It is very uncertain whether PEEP changes pneumonia compared with zero end‐expiratory pressure (ZEEP) during mechanical ventilation (very low certainty).

• Positive end‐expiratory pressure (PEEP) during anaesthesia for prevention of mortality and postoperative pulmonary… 2014 · Cochrane Headline outcomes only
  RR 0.4
  3 studies · 120 participants
  Very low

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

• Positive end‐expiratory pressure (PEEP) during anaesthesia for prevention of mortality and postoperative pulmonary… 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 88 participants
  Very low