Tissue removal device with high reciprocation rate

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/3201 (2006.01)

Patent

CA 2760328

Disclosed is a tissue removal device. The device includes an outer tubular body, an inner tubular body and a cutting edge on the inner tubular body. The outer tubular body includes a window, which may be opened or closed by moving the cutting edge. The cutting edge has a hardness that exceeds the hardness of the material of the inner tube. The cutting edge may have a Rockwell C hardness of at least about 50, while the inner tube has a Rockwell C hardness of no more than about 40. The cutting edge may be formed by a milling step, and the inner tube may be formed by a drawing step. Tissue severed by the cutting edge may be removed at a rate of at least about 1.8 grams per minute through the inner tube, and the outer tubular body may have an outside diameter of no more than about 3.5 mm.

L'invention porte sur un dispositif d'ablation de tissu. Le dispositif comprend un corps tubulaire externe, un corps tubulaire interne et un bord de découpe sur le corps tubulaire interne. Le corps tubulaire externe comprend une fenêtre, qui peut être ouverte ou fermée par déplacement du bord de découpe. Le bord de découpe a une dureté qui dépasse la dureté du matériau du tube interne. Le bord de découpe peut avoir une dureté Rockwell C d'au moins environ 50, tandis que le tube interne a une dureté Rockwell C de pas plus d'environ 40. Le bord de découpe peut être formé par une étape de fraisage et le tube interne peut être formé par une étape d'étirement. Le tissu coupé par le bord de découpe peut être extrait à une vitesse d'au moins environ 1,8 grammes par minute à travers le tube interne, et le corps tubulaire externe peut avoir un diamètre externe de pas plus d'environ 3,5 mm.

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