Surgical reamer and method of using same

A - Human Necessities – 61 – B

Patent

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A61B 17/16 (2006.01)

Patent

CA 2360867

A device for expedited reaming of a medullary canal and method of using the same are disclosed. The device includes a reamer head (20; 20') connected at the distal end of a rotatable drive shaft (102). The reamer head (20; 20') has a cutting head (40) with a plurality of blades (41) and flutes therebetween. Each blade (41) has a front cutting portion. At least some of the blades have a front cutting portion that includes at least two and preferably at least three planar surfaces (51, 52, 53). The blades can also include a side cutting portion (44). The disclosed method for removing material from the medullary canal of a bone includes the steps of reaming an area of the medullary canal to remove material; irrigating the material to be removed while reaming to reduce generation of heat and move removed material from the reaming area; and aspirating the removed material while reaming to create a negative intramedullary canal pressure to assist in the removal of the material.

L'invention concerne un dispositif pour l'alésage accéléré du canal rachidien, et son procédé d'utilisation. Ledit dispositif comporte une tête (20, 20') d'alésoir accouplée à l'extrémité distale d'un arbre d'entraînement rotatif (102). Ladite tête d'alésoir (20, 20') possède une tête coupante (40) à plusieurs lames (41) et des cannelures entre ces dernières. Chaque lame (41) possède une partie coupante avant. Au moins une des lames possède une partie coupante avant comprenant au moins deux surfaces planes (51, 52, 53) et de préférence trois. Les lames peuvent également posséder une partie coupante latérale (44). Ledit procédé de retrait de matière du canal rachidien d'un os, consiste à aléser une zone dudit canal de sorte que la matière soit enlevée; à irriguer la mat ière à enlever pendant l'alésage, de sorte que la génération de chaleur soit réduite et que la matière soit déplacée de la zone d'alésage; et à aspirer la matière enlevée pendant l'alésage, de s orte qu'une pression intramédullaire négative soit créée pour faciliter l'enlèvement de la matière.

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