Liquefracture handpiece tip

A - Human Necessities – 61 – F

Patent

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Details

A61F 9/007 (2006.01) A61B 17/32 (2006.01) A61B 18/04 (2006.01)

Patent

CA 2382475

A surgical handpiece having two coaxial tubes or channels mounted within a body. The first tube is used for aspiration and is smaller in diameter than the second tube so as to create an annular passage between the first and second tube. The annular passage communicates with a pumping chamber formed between two electrodes. The pumping chamber works by boiling a small volume of the surgical fluid. As the fluid boils, it expands rapidly, thereby propelling the liquid downstream of the pumping chamber out of the annular passage. The distal end of the annular gap is sealed by sealing together the distal ends of the first and second tube and a plurality of orifices or ports may be formed near the seal. As the expanding gas is propelled down the annular gap, the gas/liquid stream is forced out of the distal orifices in a controlled and directed manner. The distal end of the first and second tubes may contain a bend.

L'invention concerne une pièce à main chirurgicale présentant deux tubes ou canaux coaxiaux montés à l'intérieur d'un corps. Le premier tube est destiné à l'aspiration et il présente un diamètre plus petit que le second tube de manière à créer un passage annulaire entre le premier tube et le second tube. Le passage annulaire communique avec une chambre de pompage formée entre deux électrodes. La chambre de pompage fonctionne en portant à ébullition un volume faible du liquide chirurgical. Au fur et à mesure que le liquide est en ébullition, il s'étend rapidement, propulsant le liquide en aval de la chambre de pompage hors du passage annulaire. L'extrémité distale de l'espace annulaire est scellée par jointure des extrémités distales du premier tube et du second tube et une multitude d'orifices ou de ports peuvent être formés prés du joint. Au fur et à mesure que le gaz en expansion est propulsé vers l'espace annulaire, le flux gazeux/fluidique est poussé hors des orifices distaux de manière commandée et orientée. L'extrémité distale du premier tube et du second tube peut présenter un coude.

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