Selective Dorsal Rhizotomy

Debate between Chris Heaton-Harris and Tom Brake

Wednesday 18th April 2012 Commons Chamber

[Chris Heaton-Harris (Daventry) (Con)]

A couple of years ago, like every other candidate in the general election I was eagerly watching my local press—for me, mainly the Daventry Express—to see what stories were making local headlines. In the run-up to the election, the Daventry Express and its sister paper the Northampton Chronicle and Echo both rather brilliantly covered the story of Holly Davies, a young girl from Daventry who was suffering from cerebral palsy and whose family were raising £40,000 so that she could go to America for a life-changing operation that would enable her to walk freely for the first time in her life. A few months later Holly, who could barely walk before the operation, returned from the St Louis children’s hospital a completely different girl. The procedure she had is called selective dorsal rhizotomy, or SDR, and Holly was operated on by the world’s leading expert surgeon in this field—Dr Tae Sung Park.

Dr Park is without doubt one of the world’s leading paediatric neurosurgeons, has received a host of honours for his surgical innovations and clinical research, and has literally been the pioneer in this field. St Louis school of medicine in Washington university, where Dr Park is the Shi Hui Huang Professor of Neurological Surgery, is ranked third in the US, while the St Louis children’s hospital is ranked fifth in the US for overall performance in medicine. Those world-leading institutions would not allow the SDR operation to be practised if it did not work or if it had significant complications. They know that it works. Indeed, SDR is so successful that every single medical insurance policy that can be bought in the States covers the procedure because it is realised that spending money up-front on these individuals saves a great deal more expense in the future—a point I wish to heavily underline in this debate.

Dr Park has operated on people from 48 different countries and a number of those countries have trained or are training surgeons to offer this procedure. Indeed, SDR is currently performed in Germany, Sweden, the Netherlands, Italy, Poland, Korea, Japan, Hong Kong, Canada and Mexico. As of 30 March 2012, 145 people from the United Kingdom have been operated on in St Louis—120 from England, 18 from Scotland and 7 from Wales.

So what is this miracle operation, selective dorsal rhizotomy? Of all the surgical procedures currently performed on patients with cerebral palsy, SDR has probably undergone more thorough scientific scrutiny than any other, including the various types of orthopaedic surgery. Accumulated evidence and my constituent’s experience indicate that SDR is an excellent option for selected patients with spastic cerebral palsy.

SDR involves the sectioning, or cutting, of some of the sensory nerve fibres that come from the leg muscles. There are two groups of nerve roots that leave the spinal cord and lie in the spinal canal. The ventral spinal roots send information to the muscles and the dorsal spinal roots transmit sensation back from the muscles to the spinal cord. In the operation, the neurosurgeon divides each of the dorsal roots into between three and five rootlets and stimulates each electronically. By examining the electromyographic responses from muscles in the lower extremities, the surgical team can identify the rootlets that have caused the spasticity. The abnormal rootlets are selectively cut, leaving the normal rootlets intact, which reduces the number of mixed messages from the muscles, resulting in a better balance of activity in the nerve cells in the spinal cord and thus reducing spasticity.

Let me tell the House what that means in human terms. Last year, I was fortunate enough to meet for the first time Holly’s mum, Jo Davies, who wanted to talk to me about Holly’s new post-operation life. I shall read a few lines from “Holly’s Diary” a few years after her operation:

“September 2011—and Holly is starting school. She has her school shoes, bought from Clarks, not from Northampton General Hospital—and she loves them! It is such a small thing, but something I really never thought she would be able to do. I used to worry about school shoes—I know this sounds silly but the NHS would only give you one pair of boots at a time and this was either going to mean her having pink boots for school or black boots for home. Not very fair on a little girl—but now we don’t have to worry. She is wearing normal school shoes, has flashing trainers for the weekend and now even has a pair of ‘Ugg’ boots!

We recently posted a video of Holly on her Facebook page as people were asking how she was doing. It isn’t until you watch the before and then after videos that you see the amazing progress she is making. Dr Park even commented on her video and was really pleased with what he saw and has assured us that more improvements will be seen in the next 3 months.”

[Tom Brake (Carshalton and Wallington) (LD)]

May I draw to my hon. Friend’s attention the success of the operation for my constituent Dana Johnston, and encourage him to commend the work that she and her family have done with Support4SDR to campaign on the issue?

[Chris Heaton-Harris]

I happily commend their work. I have met Dana and her mother—a very powerful lady who has fought hard for her daughter’s rights and saved a lot of money so that she could have the procedure.

To return to the diary:

“Just these last couple of days she has started to learn to run. Prior to SDR her running technique was no faster than my normal walking pace and she had a swing to her hips that made it look like she would trip at any moment. I now need to walk very fast and sometimes even jog to keep up with her run and she has less swinging of the hips. She is still a long way off the speed and ability of her friends when it comes to running but she is definitely getting better at it.”

The next point is very important:

“Holly has also grown in confidence. She speaks out at school, joins in with activities more and is a nightmare at the park. She climbs up climbing frames that even her 7 year old sister would be wary over. It really is hard to believe that without the operation she would not be able to do these things.”