How does the world’s first device implanted in a child’s skull to control epilepsy work? Health | Magazine

A boy with severe epilepsy has become the first patient in the world to test a new device placed in his skull to control seizures.

The neurostimulator sends electrical signals deep into Oran Noelson’s brain, reducing his daytime epileptic seizures by 80 percent.

His mother Justine assured the BBC that he is now happier and His “quality of life is much better”.

The operation was carried out as part of a trial at London’s Great Ormond Street Hospital in October when Orlan, now 13, was 12.

The boy from Somerset (254km west of London) suffers from external Lennox-Gastaut syndrome, a form of epilepsy that has become resistant to traditional treatments developed when he was three years old.

Since then, he has suffered daily seizures ranging from Two dozen and a few hundred.

When the BBC first interviewed Oran’s mother last autumn before the operation, she explained how Oran’s epilepsy had dominated his life.

“It stole his entire childhood.”explain.

The woman said Orlan had suffered various seizures, including falling to the floor, shaking violently and losing consciousness.

Mothers reported that sometimes their children would stop breathing. I needed emergency medication to revive him..

Oran also has autism and attention deficit hyperactivity disorder (ADHD), but Justin says his epilepsy is by far the biggest obstacle in his life.

“He was a fairly bright three-year-old, and within a few months of starting to have seizures, he rapidly deteriorated and lost many of his skills,” she recalls.

Oran is part of the CADET project: A series of trials evaluating the safety and effectiveness of deep brain stimulation for treating severe epilepsy.

Great Ormond Street Hospital, University College London, King’s College Hospital and Oxford University are all involved in the initiative.

The neurotransmitter Picosim is produced by the British company Amber Therapeutics.

How the device works

Seizures are caused by abnormal bursts of electrical activity in the brain.

The device emits a constant pulse of electrical current designed to prevent or Interrupt exception signal.

“I want him to come out of this fog of seizures and get some of himself back. I want my son back,” Justin said before Oran’s surgery.

The surgery took place in October 2023 and lasted approximately 8 hours.

The team was led by pediatric neurosurgeon Martin Tisdall, He inserted two electrodes deep into Orlan’s brain until they reached the thalamus.a key part of neural information transmission.

The margin for error in cable placement is less than one millimeter.

The end of the wire is connected to the neurostimulator, a 3.5-centimeter square device 0.6 centimeters thick that is placed in the depression in Orlan’s skull where the skull had been removed.

The device then screws the neurostimulator into the surrounding skull, locking it in place.

Deep brain stimulation has been tried before to treat childhood epilepsy, but until now the neurostimulator has been placed in the chest with wires connected to the brain.

“We hope this study will allow us to determine whether deep brain stimulation is effective Effective treatment for this severe type of epilepsyTisdall told the BBC.

It is also working on a new type of device that would be particularly useful for children because the implant is located in the skull rather than in the chest. “We hope this will reduce potential complications,” he added.

Scientists hope to reduce the risk of infection and device failure after surgery.

Orlan had a month to recover from the surgery before the neurostimulator was activated.

When the device is turned on, the boy cannot feel it. You can charge your device every day through wireless headphones while continuing to do what you love, such as watching TV.

Seven months after the operation, the BBC visited Oran and his family to find out how they are doing. Justin tells us there has been a lot of progress.

“He is more alert and has no seizures during the day”he explained.

His nocturnal seizures were also “shorter and less severe.”

“I’ll get it back slowly,” he said.

Tisdall said: “We are delighted that Oran and his family have noticed the tremendous benefit of treatment and that it has significantly improved his seizures and quality of life.”

The young man is currently taking horse riding lessons, something he clearly enjoys.

Although there is a nurse available to provide oxygen and one of his teachers is always nearby in case of emergency, so far Neither is necessary.

As part of the trial, three additional children with Lennox-Gastaut syndrome will receive deep brain nerve stimulators.

Currently, Orlan receives continuous electrical stimulation from his device.

“The future looks brighter”

But in the future, the team plans to have the neurostimulator respond to changes in brain activity in real time, trying to stop a seizure when it’s about to happen.

Justin admitted to being very excited about the next phase of the trial.

“The Great Ormond Street team gave us hope… Now, the future looks brighter”.

Oran’s family knows his treatment is not a cure, but they are optimistic that he will continue to grow beyond epilepsy.

The Picosim external neurostimulator owned by Amber Therapeutics has also been used to treat Parkinson’s patients.

Another type of neurostimulator, which is mounted on the skull, is already used in the United States to treat epilepsy.