What do systematic reviews say?

Capnography and standard monitoring vs standard monitoring

Capnography and standard monitoring showed no clear difference in hypotension compared with standard monitoring (moderate certainty).

• Capnography versus standard monitoring for emergency department procedural sedation and analgesia 2017 · Cochrane Headline outcomes only
  RR 2.36 [0.98, 5.69]
  1 study · 986 participants
  Moderate

High‐frequency oscillation vs conventional ventilation

It is very uncertain whether high‐frequency oscillation changes hypotension compared with conventional ventilation (very low certainty).

• High‐frequency oscillatory ventilation versus conventional ventilation for acute respiratory distress syndrome 2016 · Cochrane Headline outcomes only
  RR 1.02 [0.54, 1.9]
  4 studies · 392 participants
  Very low

Intervention not reported

• Partial liquid ventilation for preventing death and morbidity in adults with acute lung injury and acute respiratory… 2013 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 302 participants
  Low

Right lateral vs left lateral horizontal positioning

The review found no eligible studies for this question.

• Lateral positioning for critically ill adult patients 2016 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings for the main comparison: cough augmentation techniques vs no cough augmentation technique

It is very uncertain whether summary of findings for the main comparison: cough augmentation… changes adverse events 1. Hypotensionc 2. Hypertensiond 3. Secretion… compared with no cough augmentation technique (very low certainty).

• Cough augmentation techniques for extubation or weaning critically ill patients from mechanical ventilation 2017 · Cochrane Headline outcomes only
  RR 3.4 [0.1, 81.3]
  1 study · 75 participants
  Very low