Minimally invasive extracorporeal circulation protects against postoperative pulmonary endothelial injury in elderly cardiac surgery via suppressing the C5a-mtDNA-cGAS-STING axis: a mechanistic randomized controlled trial.
Yun Zhao, Jiaxing Wang, Zhaohua Yang et al.
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In 30 seconds
This randomized controlled trial investigated the effects of minimally invasive extracorporeal circulation (MiECC) on postoperative pulmonary complications in 94 elderly patients (≥70 years) undergoing cardiac surgery. The study found that MiECC significantly reduced the relative risk of postoperative pulmonary exudative complications by 52.6% compared to conventional extracorporeal circulation (CECC), while also maintaining higher intraoperative hemoglobin levels and lower inflammatory markers.
Key findings
- MiECC reduced postoperative pulmonary exudative complications by 52.6% compared to CECC.
- Intraoperative hemoglobin levels were significantly higher in the MiECC group.
- Postoperative serum levels of complement C5a and pro-inflammatory cytokines were significantly lower in the MiECC cohort.
- MiECC serum led to a 38.2% reduction in mitochondrial superoxide accumulation.
Why it matters
Understanding the protective mechanisms of MiECC against pulmonary complications in elderly patients can inform clinical practices and improve postoperative outcomes. The findings suggest a potential therapeutic target in the C5a-mtDNA-cGAS-STING axis for preventing lung injury.