The edition · Emergency & Critical Care
Head-up positioning prevents ventilator pneumonia — and the steeper angles cause pressure ulcers
An updated Cochrane review of 48 trials separates what head-of-bed angle actually buys from what it costs, a dual-framework meta-analysis leaves capillary refill–guided resuscitation on the edge of significance, and WEAN SAFE shows a 78% ICU mortality in patients who never wean.
The edition in brief
Today's emergency and critical care edition leads with an updated Cochrane review of 48 randomised trials in 7,955 mechanically ventilated adults. Semi-recumbent positioning reduces clinically suspected ventilator-associated pneumonia against supine (risk ratio 0.42, 95% CI 0.33–0.52, high certainty) and may shorten ventilation by about three days, with no clear mortality effect. Angles of 30–45° beat under 30° for pneumonia but probably increase pressure ulcers (RR 2.79, 1.28–6.11), and 40–45° offers no further pneumonia reduction over 30° while again raising pressure ulcers. Lateral or lateral-rotation positioning outperformed fixed semi-recumbent positioning on pneumonia and ventilation duration. A dual frequentist-Bayesian meta-analysis of seven trials in 2,408 patients with septic shock found peripheral perfusion-guided resuscitation gave a 28-day mortality risk ratio of 0.87 (95% CI 0.76–1.01, P = 0.06, I² 0%), with a Bayesian posterior probability of 97.2% that the ratio is below 1. A secondary analysis of the WEAN SAFE cohort identified three phenotypes among 664 patients who failed weaning at day 90, in whom ICU mortality was 78% against 2% in those who weaned, and linked a failed first separation attempt to decisions to withdraw life-sustaining therapy. A meta-analysis of five observational studies associates fragmented QRS on admission ECG with in-hospital mortality in pulmonary embolism.
Capillary refill–guided resuscitation sits at P = 0.06, and the Bayesian analysis says 97.2%
Keep assessing peripheral perfusion, keep using lactate, and wait for an adequately powered trial before rebuilding the protocol.
Failing the first separation attempt is where the trajectory turns
After a failed first separation attempt, look for what is reversible before the team's expectations do the prognosticating.
Fragmented QRS on the admission ECG marks a worse pulmonary embolism
A useful prompt to look harder at the right ventricle, not a risk score — keep using PESI.
Trauma ARDS is a multi-hit problem, and most of the hits come after the injury
Most of what prevents trauma ARDS happens in the first 48 hours and is not ventilator management — analgesia, transfusion restraint and timely surgery.
Say the head-of-bed angle out loud at every handover
Name the head-of-bed angle at every handover, and restore it as the last step of every procedure.
30° prevents ventilator pneumonia; 45° adds pressure ulcers and nothing else
Make 30° the unit's head-of-bed target, and audit pressure areas daily in anyone nursed head-up.
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