Kerrison rongeurs
OwnerEdgar Weaverinventor
Life of this patent
Estimating the term…
Abstract
A Kerrison rongeur employing a shearing/cutting or grasping mechanism, and suited for specific cutting and sampling bone, cartilage and soft tissue. A slideable upper member has on its advancing face a cutting element that moves past an opposing cutting element on a stationary footplate to produce a shearing action of tissue positioned within the jaws. The cutting element of the slideable member may move past the stationary member on the outside in an overbite situation or on the inside in an underbite situation. A hybrid over/underbite jaw is also contemplated along with a guillotine cutting element and a textured grasping element. In operation, the tissue is placed between the jaw and footplate, and the former is advanced towards the latter to cut and/or grasp and remove for a surgical site.
Claims16
A Kerrison-type rongeur, comprising:
- an elongate chassis having at a proximal end a handle assembly for gripping by an operator and at a distal end a footplate protruding therefrom, said footplate having a surface forming a first angle with the vertical and comprising a first cutting element;
- an elongate upper member slideably affixed to said chassis and engaged at a first end to said handle assembly so as to be advanceable to said footplate by operation of said handle assembly, said upper member further comprising a second cutting element at a second end, said cutting element forming second angle with the vertical;
- wherein said second cutting element is advanced closely past said first cutting element by operation of said handle assembly such that tissue situated between said cutting elements is resected by a shearing action between said cutting elements.
A Kerrison-type rongeur, comprising:
- an elongate chassis having at a proximal end a handle assembly for gripping by an operator and at a distal end a footplate protruding therefrom, said footplate having a first textured surface forming a first angle with the vertical;
- an elongate upper member slideably affixed to said chassis and engaged at a first end to said handle assembly so as to be advanceable to said footplate by operation of said handle assembly, said upper member further comprising a second textured surface at a second end said second textured surface forming second angle with the vertical;
- wherein said second textured surface is advanced to said first textured surface by operation of said handle assembly such that tissue situated between said textured surfaces is grasped therebetween.
A Kerrison-type rongeur, comprising:
- an elongate chassis having at a proximal end a handle assembly for gripping by an operator and at a distal end a footplate protruding therefrom, said footplate having a surface forming a first angle with the vertical and comprising a groove therein;
- an elongate upper member slideably affixed to said chassis and engaged at a first end to said handle assembly so as to be advanceable to said footplate by operation of said handle assembly, said upper member further comprising a cutting element at a second end in cooperative alignment with said groove, said cutting element forming second angle with the vertical;
- wherein said cutting element is advanced into said groove by operation of said handle assembly such that tissue situated between said cutting element and said footplate is resected by a shearing action between said cutting element and said groove.
Dependencies are inferred from the claim text.