Laser hope for 700 new babies
Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.A TECHNIQUE that shines pulses of laser light into babies' skulls could save 700 newborn children from brain damage each year, scientists say.
Dr Jeremy Hebden of University College London (UCL), who is leading the system's development, said it could be tested in hospitals in a year.
An array of detectors picks up how much of the red laser light manages to penetrate the thin bones of the infant skull, and uses that data to reconstruct a picture of how well oxygen is reaching different parts of the brain. That can then be used to plan treatments.
Five per cent of the 14,000 premature babies born in Britain each year suffer birth asphyxia, in which their brains receive insufficient oxygen.
"If you can diagnose that it's happened, you can treat it to prevent permanent damage," said Dr Hebden. "But you can't put them into an X-ray machine or NMR system to see if enough oxygen is getting to the brain."
Cooling the baby to slow brain cell death, or increasing the amount of carbon dioxide in the air it breathes, which encourages blood vessels to expand, are effective treatments.
The system now being built uses components developed to measure neutron flux in nuclear power stations. It arranges 32 light detectors and low- powered laser emitters in a band that would fit around the baby's head.Laser pulses lasting just one picosecond (a thousand billionth of a second) are fired in sequence around the head. Some of the light can penetrate the thinner tissues, some will be absorbed by bone, and some will be absorbed by the blood. But oxygenated tissue and blood absorbs more red light than when deoxygenated, so they will transmit less light.
Simple versions of such systems - which slip over the end of a finger - are already used in many hospitals to measure blood oxygenation levels in adults. The new system is a huge leap forward.
By building up a picture of how different pulses sent to different parts of the skull are absorbed or transmitted to other parts of the skull, and using computerised reconstruction techniques, the scientists can work out how different parts of the brain are coping.
But building up a picture of how well oxygen is reaching tissues within the brain is a very complex problem. "The mathematics are amazingly complex," said Dr Hebden. "There are the bones, and the tissues. You have to make various assumptions about symmetry of the brain. But in the end it should construct a picture of a slice through the skull."
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments