Game Changer

Feb 26

Life has suddenly turned upside down this week.  Saturday saw the arrival of our beautiful daughter – Emily Rose, and I know that our lives have been so completely changed forever.  As soon as I saw her face I was smitten and I’ve hardly been able to stop staring at her since she came along.

Dave and Emily Henson

Daddy and Daughter Selfie

Emily Rose

Emily Rose

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Glad to be Alive

Feb 16

This week saw the coming and going of my 4th ‘Alive Day’ – the anniversary of my injury.  It’s always a confusing time of year for me. I spend a lot of time thinking about the time leading up to my injury and I often experience regret – not about my injuries but the loss of my hard earned career.  The enjoyment of the Army comes from the people you are with, those people you experience every kind of up and every kind of down with.  The ones that you get out of bed for in the morning and the ones that will sometimes put you in it in the evening.  The ones you risk life and limb to protect.  I miss those people every day.

I miss this everyday

Too True

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Life Changing Technologies

Feb 11

Life as an amputee can be difficult – memories of what you used to be able to do are all around and experienced on a daily basis.  The current prosthetics available, using microprocessors and motors and bluetooth and carbon fibre, are far better than anything we’ve had before and allow amputees to carry out elements of daily life without hindrance.  However, there is a long way to go before they even come close to biological limbs.  I’ve picked out four of the technologies currently under development that I find most exciting to, hopefully, give an insight into where the prosthetics industry and amputee treatment are heading.

1. 3D Printing

3D printing is all the rage these days.  At the Detroit Motor Show in January, a company called Local Motors unveiled their latest model of fully functioning 3D printed car and was featured on the BBC.  The Open Hand Project is a crowd-funded start up project that utilised 3D printing to create a functioning robotic hand for use by arm amputees.  Whilst not offering function above and beyond what is already on the market, the technologies involved allow a price tag around 100 times cheaper than some of the more advanced available options.  What’s so exciting about 3D printing within prosthetics is the cost factor.  Expensive manufacturing processes can be avoided as well as centralised production – designs can be emailed and produced locally, drastically reducing the logistical burden.  Spare parts are equally accessible. The open-source nature of the Open Hand Project allows for customisations and modifications depending on user requirements.  Components aren’t the only part of prosthetics that can benefit from 3D printing processes.  This article from The Manufacturer talks about the University of Southampton’s research into 3D shape measurements and patient specific biomechanical analysis.  Whilst this research is intended for rehabilitation analysis, it carries exciting implications for creating a patient specific, medically appropriate 3D printed socket.  The Media Lab at MIT are also developing sockets that are not only easier to fabricate, but beneficial to the long term comfort and performance of the prosthetic limb.  The VIPr socket uses 3D stump measurement and subsequent biomechanical analysis to create a ‘smart socket’ that allows both stiff and pliable areas of the socket depending on required contact pressure according to the user’s internal stump structure.  Engineers on the Innovation and Design Engineering course at the Royal College of Art and the Imperial College, London, have used bone structure algorithms in conjunction with novel materials selection and 3D printing to create the Endura socket, designed with a high strength to weight ratio for maximum comfort and performance for high level athletes.

Endura Socket image copyright Sebastiaan Wolzak

Endura Socket image copyright Sebastiaan Wolzak

The flexibility and affordability of manufacture allow for customised designs to be easily produced without shipping, tooling and labour costs.  3D measurement techniques will lead to medically appropriate 3D printed sockets and innovations in 3D carbon fibre printing offer the high strength and durability required for the loads experienced during walking or running.  These technologies will drastically reduce the time, cost and labour burden for prosthetic components.  These reductions will allow the more amputees access to higher technology components as the cost is reduced and much shorter lead times for the fitting and delivery of sockets which will lead to a marked improvement in quality of life.

The scope of possibilities for 3D printing are already making steps into the medical world and go beyond the manufacture of traditional prosthetic components.  Patient Specific Implants (PSIs) are already used in orthopaedic implants such as knee replacements and resurfacing.  A CT scan is conducted and the 3D data is sent to the product manufacturer and a CAD code is created to machine a one-off PSI.  As can be imagined, this often has large cost implications and a much longer product lead time compared to off-the-shelf products.  Advances in printing using techniques grouped under the umbrella term ‘Additive Manufacturing‘ have allowed for the creation of products constructed from metal or ceramic powders.  These techniques, used in the medical field, have received a large amount of press when a 3D printed jaw was manufactured from titanium powder and implanted into an 83 year old woman’s face in the Netherlands in 2011.

3D Printed Jaw - image from news-medical.net

3D Printed Jaw – image from news-medical.net

A very similar technique has recently been used in Israel to recreate the lower half of a patient’s face after he was injured in a rocket attack in Syria last year.  The technology goes beyond jaws and bones.  Ears, kidneys, blood vessels and skin grafts have all also been 3D printed, conveniently described in this short article from Popular Science.  This ability to manufacture ‘replacement’ body parts is going to increase in quality and capacity, expanding the potential for stump lengthening and joint and limb recreation, described in more detail in the Limb Regeneration section.

Want to read more?

Try this article from Wired Magazine, or this article from The Telegraph or this one from Forbes magazine or just Google 3D Printed Prosthetics

3d printed hand

Image from openhandproject.org

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Freezing February

Feb 8

This week saw outside temperatures head the wrong side of zero for several consecutive mornings, and getting out of the nice warm truck took a few minutes longer than it normally does.  It was freezing.  Tuesday morning was a blanket of snow, Wednesday it looked like I should have brought my ice skates and Thursday saw sideways snow coming off the South Downs.  Still, by taking extra time and care warming up you can still put in consistently good sessions – for me, acceleration, speed and cadence are all improving – every session counts.

Frozen track 040215

Spikes or skates?

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January Training

Jan 30

January 2015 really was a new start.  After making some much needed fitness progression through the first half of the winter, I increased my training schedule to two sessions a day, six days a week with one full day of recovery.  The first week of this new regime was a physical and mental drain.  Dealing with the cold, wet and windy early morning starts as well as coping with the increased metabolic cost – creating and maintaining a correct diet and sleeping plan was a shock to the system.  Thankfully, the track is only 15 minutes away and my S & C sessions are carried out in my home gym or once a week at Elite MPH (@EliteMPH) on the other side of Southampton – meaning that commuting time is minimised and the recuperation time is maximised.  The new program consists of 4 track sessions, 6 S & C sessions and 2 boxing sessions – used both for fitness – building endurance at high intensity – and for engaging and improving the central nervous system – decreasing reaction time and building explosive strength.  I have also found that it gives me a vehicle to develop controlled aggression, a key quality for successful sprinting.  One of my key struggles over the course of this journey has been discovering how to best adapt conventional lifting techniques to work in conjunction with my amputations.  Rich Whitehead (@Marathonchamp) has been absolutely key in giving me training tips for exercises to develop lower body strength, and my brother has helped me turn these into reality.

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