Groundbreaking Epilepsy Drug Trial Offers Hope for Children with Dravet Syndrome
Researchers from University College London and Great Ormond Street Hospital have reported highly encouraging early results from a clinical trial involving an experimental drug called zorevunersen. The study focused on 81 children, aged two to 18, diagnosed with Dravet syndrome, a rare and severe genetic form of epilepsy that typically begins with seizures in infancy and often proves resistant to conventional treatments.
Before the trial, participants experienced an average of 17 seizures per month. During the study, children received either a single dose of zorevunersen, ranging from 10mg to 70mg, administered via lumbar puncture, or multiple doses of 20mg to 70mg over a three-month period. The most significant outcomes were observed in those given the highest 70mg dose, whether administered once, twice, or three times. These children saw a dramatic reduction in seizure frequency, with decreases ranging from 59% to 91% during the initial 20 months of follow-up monitoring.
Understanding Epileptic Seizures in Children
Kirsten McHale, an epilepsy nurse consultant and head of health services at Young Epilepsy, explains that an epileptic seizure occurs when the brain experiences an excessive surge of electrical activity. "Our brain communicates with the rest of our body through the use of electricity, and an epileptic seizure is what happens when it has too much electricity in it," she states. The specific symptoms depend on which area of the brain is affected by this intense activity.
Focal seizures originate in one specific part of the brain and may manifest as repetitive behaviours. In contrast, generalised seizures involve the entire brain, potentially causing loss of consciousness, falling, and rhythmic convulsions. McHale emphasises the importance of identifying the seizure type for appropriate management.
Key Signs of Seizures Parents Should Monitor
While seizure experiences vary, several common indicators can alert parents to potential episodes:
- Convulsions: Generalised tonic-clonic seizures often involve sudden falling and rhythmic convulsions, making them highly noticeable.
- Biting Cheek or Tongue: Look for signs of blood or swelling inside the mouth, which may occur during a seizure.
- Staring into Space: Absent seizures, often mistaken for daydreaming, involve brief lapses in consciousness where the child appears unresponsive. "You can have 50-100 absent seizures a day, and even though it doesn't look like your body's doing anything, you are effectively unconscious," McHale notes, highlighting how this can impact learning and concentration at school.
Essential Steps for Parents During a Seizure
McHale provides crucial guidance on how to respond effectively and safely if a child experiences a seizure:
- Time the Seizure: Immediately note the duration. A generalised tonic-clonic seizure lasting longer than five minutes typically requires emergency treatment.
- Stay Calm and Ensure Safety: Remain composed and clear the surrounding area of dangerous objects to prevent injury.
- Avoid Restraint: Do not attempt to hold the child down if their limbs are moving uncontrollably, as this can cause harm. Instead, place something soft under their head and offer verbal reassurance.
- Record the Event: If possible, use a mobile phone to video the seizure. This visual evidence is invaluable for medical professionals in diagnosis and assessment.
- Take Detailed Notes: Document the seizure's characteristics and timing. A diagnosis of epilepsy generally requires two or more unprovoked seizures occurring at least 24 hours apart, so thorough records aid in building a case for further investigation.
- Protect Privacy and Dignity: If a seizure occurs in public, shield the child from onlookers, as episodes can sometimes involve loss of bladder or bowel control, which can be distressing upon recovery.
- Use the Recovery Position: Once the seizure subsides, gently place the child in the recovery position to maintain an open airway.
When to Seek Immediate Medical Assistance
McHale advises calling emergency services (999) in several critical situations:
- The seizure lasts longer than five minutes.
- It is the child's first seizure.
- The seizure pattern is unusual for the child.
- There are concerns about changes in skin colour or interrupted breathing.
"Paramedics are there to help and support, and they would be more than happy to come out," she reassures parents.
Next Steps and Resources
Following a seizure, consult a GP who will take a detailed history. Presenting any videos or notes can facilitate a referral to specialists, such as an epilepsy consultant or paediatrician with expertise in epilepsy. Organisations like Young Epilepsy offer valuable resources, including educational videos designed to help families support children with epilepsy effectively.
