Researchers at the University of Manchester have developed a graphene-based sensor that they say gives doctors a real-time window into stroke damage in the brain.

The ultra-thin sensor can detect the chemical and electrical changes that unfold as a stroke injures brain tissue. In a stroke, every minute counts: brain cells begin dying within minutes of losing blood supply, so faster information can mean faster treatment.

Graphene, a single layer of carbon atoms, is prized for its sensitivity and flexibility, making it suited to delicate medical sensing. The Manchester team says the device could one day help clinicians judge how much damage is occurring and tailor treatment in the crucial early hours.

The work is still at the research stage, and clinical use would require extensive trials and regulatory approvals. But the concept points to a future where stroke care is guided by live data from inside the brain rather than periodic scans.

Stroke remains one of the world's leading causes of death and disability, so even small gains in speed matter.