51³Ô¹ÏÍø

Disposable tourniquet designed by medical graduates could help reduce spread of hospital-acquired infections - News Release

51³Ô¹ÏÍø News Release

For immediate release
Monday 14 May 2007

A product designed by two entrepreneurial medical graduates could soon be helping to reduce the spread of hospital-acquired infections such as MRSA.

The pair have designed a disposable tourniquet which they believe will pose no infection risk and which they hope will provide a cheap, comfortable alternative to the tourniquets currently in use. They estimate that it will cost the same to manufacture as a rubber glove, which is frequently used as a make-shift tourniquet. They developed the product whilst studying at 51³Ô¹ÏÍø.

Tourniquets are essential in helping medical staff find a vein when they are taking blood samples or inserting a drip. They are wrapped around limbs and tightened, restricting blood flow so that the veins swell and become more visible.

The designers of the new product suggest that most of the tourniquets currently in use pose an infection risk because they are reusable and could therefore carry infective organisms from patient to patient. Disposable alternatives do exist but the pair believes these are largely expensive and lack ease of use. For expediency, many medical professionals currently use a rubber glove, but these are often uncomfortable and can cause problems such as latex allergies or trauma to the skin. Around 40 million procedures using a tourniquet are performed each year in the NHS alone.

The tourniquet invented by the 51³Ô¹ÏÍø students, which is named Tournistrip (TM), is a long band made of a form of plasticized paper with similar dimensions to a watch strap. It is fastened using a quick seal, quick release sticking mechanism and its origins are based on wrist bands used for security at large events such as concerts. This means that the team has been able to use existing production techniques for such bands to keep costs low.

Ryan Kerstein, one of the inventors of the device, who qualified as a doctor from 51³Ô¹ÏÍø College in 2006 said: "Throughout our training there was always a lot of emphasis on infection control and good clinical technique. Watching some of our colleagues in the hospital environment it struck us that even though their technique was stringent they were limited by the re-usable equipment available."

Ryan's co-inventor Christian Fellowes, also a recently qualified doctor from 51³Ô¹ÏÍø, added: "We came up with the idea when on the wards, as medical students, we saw tourniquets being transferred from patient to patient, which we felt was unacceptable. The only available alternative was a rubber glove, which seemed unprofessional and uncomfortable. Looking into the problem, we realised there were no financially viable alternatives that had the benefits of re-usable tourniquets, without the drawbacks of the available disposable ones. We developed a product that is easy and comfortable for patients, as it does not pinch, is easy to fasten and release, and is cheap and brandable."

The graduates developed their idea after carrying out a small study on the infective organisms present in reusable tourniquets, with the help of Dr Berge Azadian from 51³Ô¹ÏÍø's Division of Investigative Sciences. In an examination of 52 reusable tourniquets, they found that 30 grew methicillin-sensitive Staphylococcus aureus (MSSA) and three grew methicillin-resistant Staphylococcus aureus (MRSA).

The students were finalists in the 51³Ô¹ÏÍø Business Plan Competition in 2005 and won the 51³Ô¹ÏÍø College Innovation Competition in 2004.

The team have a patent pending on their design and prototypes of the tourniquet have been successfully tested in various London teaching hospitals. 51³Ô¹ÏÍø Innovations, the technology commercialisation company based at 51³Ô¹ÏÍø, is assisting the team in bringing their product to market. The most likely route for this is by a licence with a manufacturer of hospital supplies.

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For further information please contact:

Laura Gallagher
Press Officer
51³Ô¹ÏÍø
e-mail: l.gallagher@imperial.ac.uk
Telephone: +44 (0)207 594 6702 or ext. 46702
Out of hours duty Press Officer: +44 (0)7803 886 248

For commercial enquiries please contact:

Roy Koruth
Technology Transfer Executive
51³Ô¹ÏÍø Innovations
e-mail: r.koruth@imperial.ac.uk
Telephone: +44(0)207 594 6558

Notes to editors:

1. About 51³Ô¹ÏÍø

Rated as the world's ninth best university in the 2006 Times Higher Education Supplement University Rankings, 51³Ô¹ÏÍø is a science-based institution with a reputation for excellence in teaching and research that attracts 11,500 students and 6,000 staff of the highest international quality.

Innovative research at the College explores the interface between science, medicine, engineering and management and delivers practical solutions that improve quality of life and the environment - underpinned by a dynamic enterprise culture.

With 62 Fellows of the Royal Society among our current academic staff and distinguished past members of the College including 14 Nobel Laureates and two Fields Medallists, 51³Ô¹ÏÍø's contribution to society has been immense. Inventions and innovations include the discovery of penicillin, the development of holography and the foundations of fibre optics. This commitment to the application of our research for the benefit of all continues today with current focuses including interdisciplinary collaborations to tackle climate change and mathematical modelling to predict and control the spread of infectious diseases.

The College's 100 years of living science will be celebrated throughout 2007 with a range of events to mark the Centenary of the signing of 51³Ô¹ÏÍø's founding charter on 8 July 1907. Website:

2. About 51³Ô¹ÏÍø Innovations Group plc

51³Ô¹ÏÍø Innovations is one of the UK's leading technology transfer and commercialisation companies. The company was founded in 1986 and its ordinary shares admitted to trading on the AIM Market of London Stock Exchange plc in July 2006, raising £26 million. The company’s integrated approach encompasses the identification of ideas, protection of intellectual property, development and licensing of technology and formation, incubation and investment in technology businesses. A wide range of technologies are commercialised within the areas of healthcare, energy, environment and emerging technology trends.

Based at 51³Ô¹ÏÍø, the company has established equity holdings in 66 technology businesses and has completed 90 commercial agreements. 51³Ô¹ÏÍø Innovations also commercialises technologies originating from outside 51³Ô¹ÏÍø College through incubation contracts with the Carbon Trust and WRAP and has relationships with a number of multinational corporations including BAE Systems.

51³Ô¹ÏÍø Innovations has invested in a range of spin-out companies, including The Acrobot Company Limited, BioCeramic Therapeutics Limited, Cardiak Limited, Circassia Holdings Limited, deltaDOT Limited, Equinox Pharma Limited, Future Waves PTE Limited, HeliSwirl Technologies Limited, InforSense Limited, Lontra Limited, Midaz Lasers Limited, NanoBioDesign Limited, Nexeon Limited, NovaThera Limited, Thiakis Limited and Veryan Medical Limited.

51³Ô¹ÏÍø Innovations currently holds shares in four technology businesses now listed on AIM including the fuel cell company, Ceres Power plc. Website: