Basket type grasping tool for surgery
First Claim
Patent Images
1. A basket type grasping tool for surgery, comprising:
- a sheath;
an operation line insertable into the sheath to allow the operation line to be moved back and forth; and
a basket mounted on a distal end of the operation line and capable of being expanded by being exposed from a distal end of the sheath and contracted by being retracted back into the sheath;
wherein the basket includes a plurality of groups of elastic wires, a forward end bundling portion which bundles the groups of elastic wires at distal ends thereof, and a rear end bundling portion which bundles the groups of elastic wires together with the operation line at proximal ends thereof; and
wherein each of the groups of elastic wires comprises a plurality of elastic wires which run closely in parallel to each other from the rear end bundling portion to a branching point formed at a middle portion between the forward end bundling portion and the rear end bundling portion, at which the elastic wires of each of the groups are branched and separated from one another.
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Abstract
A basket type grasping tool of the present invention is equipped with a basket including a plurality of groups of elastic wires. The elastic wires in the respective elastic wire groups have a branch point at the same distance position in an intermediate position from a forward end tip to a rear end tip. Since the elastic wires in the respective elastic wire groups are expanded from the branch point in a spread-apart way, a stable basket shape is maintained, so that a stone can be positively grasped in the basket.
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Citations
24 Claims
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1. A basket type grasping tool for surgery, comprising:
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a sheath; an operation line insertable into the sheath to allow the operation line to be moved back and forth; and a basket mounted on a distal end of the operation line and capable of being expanded by being exposed from a distal end of the sheath and contracted by being retracted back into the sheath; wherein the basket includes a plurality of groups of elastic wires, a forward end bundling portion which bundles the groups of elastic wires at distal ends thereof, and a rear end bundling portion which bundles the groups of elastic wires together with the operation line at proximal ends thereof; and wherein each of the groups of elastic wires comprises a plurality of elastic wires which run closely in parallel to each other from the rear end bundling portion to a branching point formed at a middle portion between the forward end bundling portion and the rear end bundling portion, at which the elastic wires of each of the groups are branched and separated from one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A basket type grasping tool for surgery, comprising:
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a sheath; an operation line insertable into the sheath to allow the operation line to be moved back and forth; and a basket mounted on a distal end of the operation line and capable of being expanded by being exposed from a distal end of the sheath and contracted by being retracted back into the sheath; wherein the basket includes a plurality of groups of elastic wires which are twisted together, a forward end bundling portion which bundles the groups of elastic wires at distal ends thereof, and a rear end bundling portion which bundles the groups of elastic wires together with the operation line at proximal ends thereof; and wherein each of the groups of elastic wires has a branching point formed between the forward end bundling portion and rear end bundling portion, at which the elastic wires of each of the groups are branched and separated from one another. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification