Community Research and Development Information Service - CORDIS


RASPED — Result In Brief

Project ID: 513134
Funded under: FP6-SME

Rasp-type device to decrease surgical fractures

Hip prosthesis implantation, or hip replacement surgery as it is more commonly known, has become a very common procedure. EU-funded researchers made important steps in reducing operative fractures and post-operative complications with potential for enhancing quality of life while decreasing healthcare costs.
Rasp-type device to decrease surgical fractures
Hip replacement surgery involves opening the top end of the thigh bone (femur) and inserting a so-called hip prosthesis (artificial metallic or ceramic component) in the hollow centre of the femur, forming the new hip joint together with the pelvis.

The procedure currently involves impact-based opening of the femur with a surgical mallet, resulting in intraoperative femoral fractures in approximately 17 % of the surgeries and numerous surgical and post-surgical complications.

European researchers supported by funding for the ‘Reverberating abrasive single use piezo electric driven device’ (Rasped) project sought to develop a novel device (based on a rasp) to cut and remove bone tissue, reducing stress within the femur during surgery and thus femoral fractures.

Investigators evaluated optimum cutting strokes and angles and 3 different types of cutting teeth geometries resulting in 10 rasp designs. Further trials on 3 of the 10 resulted in optimisation of the drive unit design.

Based on the above, two configurations of the handheld piezo-driven device were designed, manufactured and tested. Further experiments should lead to enhanced force production of the device and generation of sufficient cutting pressure.

Eventual commercialisation of the Rasped project results should significantly decrease intraoperative fractures and post-operative complications in the very large population of patients undergoing hip replacement surgery. Obvious cost reductions for the European health system would follow the improved quality of life for many. In addition, the various technologies developed have potential application in other surgical situations as well as in the dental and mining industries.

Rasped has made important contributions to rasp technologies used in low-impact cutting and removal of material that could have wide reaching effects on a number of industries and on the European economy.

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