guide wire

Abstract

The object of the present invention is to provide a guide wire that maintains the insertability of the guide wire, improves the rotatability of the guide wire (operativity of the guide wire), and reduces the possibility of the resin layer being peeled off (turned up) from the tip. In the guide wire (1), the resin layer (40) has: a rear end portion (42) covering the outer circumference of the coil body (30) and having a thick outer diameter D1; The front end side is located between the mandrel (10) and the coil body (30) and has a front end (46) with a thinner outer diameter D2 than the rear end (42); and between the rear end (42) and the front end (46) ) between the tapered portion (44) whose outer diameter decreases from D1 to D2 toward the front end side, and the coil body (30) at the front end portion (46) is exposed without being covered by the resin layer (40). Thereby, while maintaining the insertability of the guide wire (1), the rotatability of the guide wire (1) (the operability of the guide wire (1)) can be improved, and the peeling of the resin layer (40) from the front end (47) can also be reduced ( Possibility of flipping up).

Description

technical field [0001] The present invention relates to a guide wire inserted into blood vessels and digestive organs. Background technique [0002] Conventionally, when a stenosis or blockage is formed in a blood vessel, bile duct, pancreatic duct, etc., the flow of blood, bile (biliary fluid), pancreatic juice, etc. becomes poor. As a method of treating such a stenosis or a blockage, a treatment method using a catheter is widely practiced. [0003] Generally, a guide wire is used to guide a catheter to a narrowed portion or an obstructed portion. When the frictional resistance between the guide wire and the wall of the blood vessel, bile duct, pancreatic duct, etc. is high, it becomes difficult for the operator to insert the guide wire into the stenosis or blockage. Therefore, there is known a guide wire that is provided with a resin layer covering the outer circumference of the coil body over the entire length of the coil body in order to easily insert the guide wire in...

AI Technical Summary

Problems solved by technology

[0005] In such a guide wire, since the frictional resistance can be reduced, it is easy to insert the guide wire into a narrow part or a clogged part. On the other hand, the entire length of the coil body is covered with a resin layer, so that the rotation performance of the guide wire is poor (guide wire problems such as lack of operability of the guide wire) or problems such as the rigidity of the tip of the guide wire tends to become high

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