2013 Spring: Arthroscopic waterjet drilling in bone: stabilizing the nozzle to counteract thrust force.
Introduction
Cutting or drilling in bone is often performed in orthopedic surgery in. Reaching the surgical spot with the current instruments can be problematic due to the rigidity of the tools that cannot follow the curved shapes of bones and joints. As a result, the wrenching of rigid tools can lead to healthy tissue damage. Using waterjets to machine bone can be a solution to this problem, as the water can be transmitted in to the body via a flexible tube to reach even the most difficult spots in joints. For precise machining of bone, the waterjet stream should be kept steady and in the predetermined direction at all times. However, a waterjet creates a thrust in opposite direction of the jet, which can lead to uncontrolled movements of the tube (fire-hose effect).
 
Research question
The goal is to design an instrument that is flexible on insertion in the joint, but keeps the instrument from any uncontrolled movements whilst waterjet machining.
 
Supervisors
Ir. Steven den Dunnen (Biomedical Engineering)
Dr. Ir. Wim‐Paul Breugem (Fluid Mechanics)
Dr. Ir. Gabrielle J.M. Tuijthof (Biomedical Engineering)

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