INSERTION DEVICE FOR PLASTIC STENT
First Claim
1. An insertion device for a plastic stent which is used to insert the plastic stent into an internal duct of a human body such as a biliary tract or ureter, the insertion device comprising;
- an operation unit which includes a body and a movable portion and moves a movable wire forward and backward;
a tip portion connected to an end of the movable wire;
a tube connected to the operation unit; and
an expanding member connected between the tube and the tip portion and made of a soft material, the expanding member being contracted in a longitudinal direction when the tip portion is moved backward and being expanded in a radial direction;
wherein the movable wire is moved backward in response to an operation of the operation unit, the expanding member is expanded in diameter, which causes an external surface of the expanding member to come into contact with an internal surface of the plastic stent and the expanding member to be securely held by the internal surface of the plastic stent.
1 Assignment
0 Petitions
Accused Products
Abstract
An insertion device for a plastic stent includes an operation unit which is operated to move a movable wire forward or backward, a tip portion connected to an end of the movable wire, a tube connected to the operation unit, and a plurality of expanding members which are connected between a plurality of tip end portions of the tip portion in an alternate manner. The expanding member is made of soft or flexible material so that it is contracted in a longitudinal direction and expanded in a radial direction when the tip portion is moved backward. Because the expanding members are expanded in diameter when the movable wire is moved backward by the operation of the operation unit, an external surface of the expanding member comes into contact with an internal surface of the plastic stent and is securely held by the internal surface of the plastic stent.
24 Citations
11 Claims
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1. An insertion device for a plastic stent which is used to insert the plastic stent into an internal duct of a human body such as a biliary tract or ureter, the insertion device comprising;
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an operation unit which includes a body and a movable portion and moves a movable wire forward and backward; a tip portion connected to an end of the movable wire; a tube connected to the operation unit; and an expanding member connected between the tube and the tip portion and made of a soft material, the expanding member being contracted in a longitudinal direction when the tip portion is moved backward and being expanded in a radial direction; wherein the movable wire is moved backward in response to an operation of the operation unit, the expanding member is expanded in diameter, which causes an external surface of the expanding member to come into contact with an internal surface of the plastic stent and the expanding member to be securely held by the internal surface of the plastic stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification