Outcomes in critically ill patients after diaphragmatic stimulation on ventilator-induced diaphragmatic dysfunction: a systematic review.
Alessandro Panelli, Julius J Grunow, Michael A VERFUß and 3 others
PMID 38214045WHAT IT FOUND
Diaphragm stimulation improved muscle strength measures like maximum inspiratory pressure, but did not shorten ventilator time or reduce death rates.
The evidence is weak and inconsistent, so it cannot yet be recommended as a standard treatment for preventing ventilator-induced diaphragm dysfunction.
Key findings
01Diaphragm stimulation increased maximum inspiratory pressure in two studies but did not shorten mechanical ventilation duration or reduce mortality in the randomized trials.
02In one small study, diaphragm thickness increased with stimulation while it decreased in controls, but this did not translate to clinical outcomes like faster weaning.
03The review included only seven studies with low evidence grades, and a meta-analysis was not feasible due to heterogeneity.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
Only seven studies were included, and most had low evidence grades (2, 3, or 4). The studies used very different types of stimulation, making it hard to compare results or combine data. Many studies were small and underpowered, meaning they might have missed real effects or found false positives. The search was limited to English and German literature, potentially missing relevant studies. Some control groups received more physical therapy sessions than intervention groups, which could confound the results. No long-term survival or functional recovery data were available for the general ICU population.
Declared interests
The work was supported by a project grant and equipment from STIMIT AG, a company involved in diaphragm stimulation technology. One author holds stocks in several companies and received honoraria from various medical firms, though the funding body reportedly had no role in the study design or writing.
The easy way to misread this
Do not interpret improvements in maximum inspiratory pressure or diaphragm thickness as proof that diaphragm stimulation helps patients recover faster. In the randomized trials, these physiological changes did not lead to shorter ventilator times or lower mortality, and the evidence base is too weak to support routine clinical use.