High speed surgical cutting instrument

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/16 (2006.01)

Patent

CA 2551887

A surgical cutting instrument including an outer tube, inner wire assembly, cutting tip, coupling chuck, and housing. The outer tube includes a lumen extending from a proximal end to a distal end. The inner wire assembly is received within the lumen. Preferably, the outer tube and inner wire assembly form a longitudinally curved segment. The cutting tip is connected to a distal section of the inner wire assembly. The coupling chuck is secured to a proximal section of the inner wire assembly. The housing maintains the outer tube and the coupling chuck. A rotating journal bearing, preferably a rotating- hydrodynamic bearing, is established between the inner wire assembly and the inner surface of the outer tube, allowing nominal rotational speeds of 80,000 RPM. Preferred embodiments of the surgical cutting instrument enhance surgeon visibility, minimize heat build-up, and provide improved stiffness and thermal protection.

L'invention concerne un instrument chirurgical tranchant qui comporte un tube externe, un ensemble de fils interne, une pointe tranchante, un mandrin de couplage, et un logement. Le tube externe comporte une lumière s'étendant d'une extrémité proximale à une extrémité distale. L'ensemble de fils interne est logé dans la lumière. De préférence, le tube externe et l'ensemble de fils interne forment un segment incurvé longitudinalement. La pointe tranchante est raccordée à une section distale de l'ensemble de fils interne. Le mandrin de couplage est fixé à une section proximale de l'ensemble de fils interne. Le logement maintient le tube externe et le mandrin de couplage. Une portée des tourillons rotatifs, de préférence une portée hydrodynamique rotative, est placée entre l'ensemble de fils interne et la surface interne du tube externe, ce qui permet des vitesses de rotation nominales de 80.000 T/M. Dans des modes de réalisation préférés, ledit instrument chirurgical tranchant améliore la visibilité du chirurgien, réduit l'accumulation de la chaleur et offre une meilleure rigidité et protection thermique.

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