Surgery is a major event that can leave older and vulnerable patients struggling with brain fog or confusion afterward. This review looks at a specific type of cell communication called extracellular vesicle signalling. These are tiny packages that cells send to each other to share information. The study asks if these signals help turn short-term stress into long-term brain dysfunction after an operation.
The review explains that brain problems after surgery are not caused by one single thing. Instead, a mix of inflammation, blood vessel issues, and immune system activity all play a part. The authors note that while these signals might help explain how stress leads to brain injury, the exact pathways are still being figured out.
Because the science is still developing, we cannot say for sure if stopping these signals would help patients. More research is needed to understand the full picture before doctors can change how they care for older adults in the hospital.