Bio-degradable Surgical Packaging Regenerates Tissues


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Combining Techniques of the Past and Technologies of the present 

One of the areas where historically there is least money invested into research and development is general and orthopaedic surgery – less than 5% of government R&D spend is dedicated to this in the UK. But yet hundreds of thousands of people suffer from long term soft tissue injuries that can be debilitating on a daily basis and have a massive affect both personally and professionally. But a team of researchers based at the University of Oxford and the Nuffield Orthopaedic Hospital in the UK have designed and developed a  ‘package’ to provide support and stimulation to soft tissue injuries to encourage and support regeneration of connective tissues.

The team led by surgeon Professor Andrew Carr have developed the implantable device which works on a ‘patch’ basis and is a dual layer of different materials. One side consists of ultra-thin woven nano-fibres, while the other side consists of a different woven material which is effectively a support network for the nano-fibres and provides protection to the tissue following surgical intervention. The support material is physically ‘spun’ on a loom – a technique which is literally hundreds of years old!
The device is thought to work by the nano-fibres stimulating old and worn cells, facilitating self-regeneration of the tissues and consequently the tissue heals. The added bonus is that the woven support network then biodegrades over a period of months thereby eliminating issues that are often found with foreign bodies remaining in place following implantation.
The device is set to be trialled initially for soft tissue shoulder injuries at the Nuffield Hospital in Oxford. Surgical intervention for this type of injury has seen a 500% increase in the UK over the past 10 years, but often the surgery is unsuccessful and repeated tissue insult occurs. The team is however hopeful that the potential uses for the device are much greater and other clinical uses such as hernias, cartilage regeneration, and heart defects.
Dual Layer Bio-degradable Impantable Device
The healing patch combines innovative new cutting edge technologies, with old fashioned material preparation techniques and illustrates that while we may ‘bring in the new’ we can still ‘bring out the old’. Do any of the community members know of other devices that have combined very aged practices which brand new technologies to create innovative ‘packages’? I’d be interested to know.
Adele Graham-King



Adele is a keen 'blogger' specialising in creating discussions in emerging drug, medical device and packaging technologies and pharmaceutical industry evolution.

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Could the Risk of Stethoscopes Cross-Infection be the ‘Push’ for Redesign?


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Adele Graham King
Medical Devices Developer,
Free Lance Writer & Blogger

In the clinical environment we are often asked and encouraged to demand that clinical staff members wash their hands, and indeed many medics and nurses wear badges that say ‘Please ask me to wash my hands’. 

Hand washing is something that is instilled into us from a very young age in nursery and kindergarten to ensure good personal hygiene, and it is widely accepted that bacteria passed from hands are the most common cause of hospital bourn cross-infection, but it could all be pointless if the medical devices we are using just pass the bugs back.

The University of Geneva recently conducted a research study of bacteria found on stethoscopes during routine use in examination of patients. The study, published in Mayo Clinic Proceedings compared the amount and type of bacteria found on the diaphragm (circular metal end piece) of the stethoscope, and the tube connecting the ear pieces, with the bacteria found on four separate sites of the doctors hands after patient examination. 

While the fingertips of the clinician were found to be the site of highest bacterial presence, the diaphragm of the stethoscope was found to have more bacteria present than any of the other site on the hand and the tube picked up substantial amounts of bacteria too. The researchers also tested specifically for MRSA (meticillin-resistant staphylococcus aureus) and found similar amounts of the bacteria on both the doctors’ hands and the stethoscopes.

Bearing in mind that with each patient examination the surface of the stethoscope touches a ‘sick’ person's 
skin the transfer of bacteria cannot be a surprise, but the design of such devices doesn’t currently facilitate effective decontamination during use, and sterilization doesn’t take place on a patient by patient basis. 

In fact digital stethoscopes that carry electronics within the end ‘piece’ which has patient contact have even more limitations with regards to cleanliness. Many stethoscopes have over moulded edges or separate parts that are removable but rarely removed. There are many sites for bacteria to ingress and multiply on these devices that are probably the most commonly used item in a clinicans’ bag. But they could realistically be the root cause of many cross-infections. Not proven – but food for thought. The design of the stethoscope has remained similar for many years, using old technology with mediocre modification in aesthetics and some developments in sound transfer, but could the cross-infection risk be the stimulus for the redesign and technological advancement of an old ‘dog’? Be interesting to see.

Adele is a keen 'blogger' specialising in creating discussions in emerging drug, medical device and packaging technologies and pharmaceutical industry evolution.

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