Hong Kong Nasal Spray Cuts Stroke Brain Damage by 80%

A breakthrough nasal spray could transform how we treat strokes, cutting brain damage by more than 80 percent without needles or surgery.

Researchers at the University of Hong Kong developed NanoPowder, the world's first neurotherapeutic nasal spray designed as emergency first aid for ischemic stroke patients. The treatment delivers medication directly to the brain through the nose, bypassing one of medicine's toughest challenges.

"We use 'nano-in-micron' technology to bypass the blood-brain barrier, a natural shield that typically blocks most drugs from entering the brain," said Professor Aviva Chow Shing-fung, who led the research team at HKU's Li Ka Shing Faculty of Medicine. By using the nose-to-brain pathway, the treatment eliminates the need for invasive procedures.

The innovation won the Special Grand Prize and gold medal at the 51st International Exhibition of Inventions Geneva this year. Clinical trials are expected to begin by 2030.

The Ripple Effect

The spray's rollout plan could save countless lives across different settings. Paramedics will use it first as emergency treatment, giving stroke patients critical care during those precious minutes when brain damage accelerates.

Next, the spray will reach high-risk groups in care facilities, where quick response can mean the difference between recovery and permanent disability. Eventually, it will become available in pharmacies for the general public, putting life-saving stroke treatment within reach of millions.

Every year, strokes affect about 15 million people worldwide. Time is everything when treating them, with doctors often saying "time is brain" because every minute without treatment means more brain cells die.

This nasal spray could change that urgent race against time. Instead of waiting for complex medical interventions, patients could receive immediate treatment that dramatically reduces damage and improves survival rates.

The technology represents years of work by HKU's Advanced Biomedical Instrumentation Centre and the Faculty of Medicine. Their solution tackles a problem that has stumped researchers for decades: how to get medication past the blood-brain barrier quickly and effectively during emergencies.

By 2030, this simple spray could become as common in emergency medical kits as bandages and defibrillators, giving everyone a fighting chance against one of the world's leading causes of death and disability.