Delirium in elderly postoperative patients: A prospective cohort study.
Chiara Muzzana, Franco Mantovan, Markus Karl Huber and 4 others
PMID 35716398WHAT IT FOUND
Postoperative delirium occurred in 7.5% of older surgical patients, mostly on days 1 or 2.
Age over 80 and heart failure predicted risk. Having drains, catheters or other lines was strongly associated with developing delirium, suggesting nurses should watch these patients closely.
Key findings
01The cumulative incidence of postoperative delirium was 7.5%, with most episodes starting on the first or second postoperative day.
02Patients aged 80 or older and those with heart failure were significantly more likely to develop postoperative delirium.
03The presence of postoperative devices such as surgical drains, bladder catheters and central venous catheters was significantly associated with developing postoperative delirium.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The study was conducted at a single district hospital that does not perform neurosurgery or cardiothoracic surgery, so results may not apply to those higher-risk populations. Only 15 patients developed delirium, which limits the statistical power to detect other potential risk factors. Blood parameters like haemoglobin and albumin were not assessed due to data access issues. No patients received dexmedetomidine, which is known to reduce delirium risk, so the effect of this specific sedative choice could not be evaluated.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not assume that removing lines and devices prevents delirium. The study shows an association, not causation. Patients with more devices may simply be sicker or have more complex surgeries, which are the actual drivers of delirium risk.