The ‘smart scalpel’ that can detect cancer

A new invention for the operating theatre to help pinpoint abnormal growths.
Smart scalpel

The iKnife, like its name suggests, is an “intelligent” knife designed for surgeons to test the health of the tissue they are operating on in real time. It is a sharp instrument combined with smart sensor technology that can tell the surgeon whether the flesh they are cutting into has any degree of cancerous tumour. The iKnife provides this information instantly, cutting down the 30 minute waiting period required by conventional tissue scanning devices.

Devised by researchers at Imperial College London, the intelligent knife was tested on 91 patients and returned a 100 per cent rate of accuracy in detecting harmful tumours. The study was published in the Science Translational Medicine journal.

The design is based on electrosurgery, a commonly used modern form of surgery which involves sending an electrical current to the tip of the scalpel. In doing so, the blade takes on ferociously high heat which allows it to vapourise tissue as it slices through it. This method also reduces blood loss drastically.

The resulting smoke is funneled through a thin tube in the body of the iKnife where a computer can analyse the molecular content of the vapour. This vapourised form of the tissue reveals the presence of corruptive cancer cells which are hard to detect otherwise.

Co-author of the smart scalpel’s trial study, Professor Lord Darzi says it is important that surgeons are able to distinguish between healthy and unhealthy tissues as they perform operations.

“In cancer surgery, you want to take out as little healthy tissue as possible, but you have to ensure that you remove all of the cancer. There is a real need for technology that can help the surgeon determine which tissue to cut out and which to leave in. This study shows that the iKnife has the potential to do this, and the impact on cancer surgery could be enormous.”