Surgical clamp pad with interdigitating teeth
Opposable surgical clamp members having opposable resilient pads with wedge-shaped and cylindrical protrusions extending from the surfaces of the pads and the use of such members for occluding vessels and other tubular body structures are described. The protrusions are arranged such that when the members are moved toward one another, the protrusions of one pad interdigitate with the protrusions of the other pad. Upon engagement with a vessel, portions of the vessel are forced into the interdigital spaces providing for improved gripping of the vessel. The protrusions also resist lateral or transverse movement of a clamped vessel relative to the pads. The existence of through holes under the pad surface alters the relative resiliency of the pad, allowing for an overall pad resiliency that minimizes trauma to a clamped vessel while allowing the local resiliency of the protrusions themselves to be of a hardness to avoid excessive deflection and retain the desired shape and gripping ability.
1. Surgical clamp members for attachment to opposing surfaces of jaws of a surgical clamping device, the jaws being mounted for movement toward and away from one another, the members comprising:
opposable resilient pads, each pad having a surface, the surface having discrete raised protrusions extending upward therefrom for engagement with a vessel or other tissue received between the jaws, wherein:
a) the protrusions of each pad are arranged in one or more rows lengthwise along the pad; and
b) the protrusions of one pad interdigitate with the protrusions of the opposed pad when the jaws are moved toward one another, and wherein each said pad surface is planar and the protrusions extending therefrom are cylindrical and extend from the pad at right angles to the pad surface.
2. The clamp members of claim 1 wherein said protrusions have hemispherical tips.
3. The clamp of claim 1 wherein said cylindrical protrusions have conical tips.
4. The clamp members of claim 1 wherein:
a) said protrusions form first and second rows lengthwise along the pad; and
b) the protrusions of the second row are staggered relative to the protrusions of the first row.
5. The clamp member of claim 4 wherein;
a) each pad has first and second sides and one or more cylindrical holes passing through the pad and opening to both first and second sides; and
b) each cylindrical hole has an axis transverse to the pad length.