Endoscopic Therapeutic Instruments
A technology of endoscopes and appliances, applied in the direction of endoscopes, applications, balloon catheters, etc., can solve problems such as easy kinks in catheter hoses, pull out guide wires, and loose hoses, and achieve easy sanitation management and prevent Twist, the effect of improving operability
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no. 1 Embodiment approach
[0045] Such as figure 1 As shown, a balloon catheter 1 for calculus removal as an endoscopic treatment tool according to an embodiment of the present invention is composed of a catheter tube 5, a balloon (treatment part) 2, a cover (cover) 13, and three branch tubes 14a- 14c, and three bushings 15a-15c.
[0046] The catheter hose 5 of the balloon catheter 1 for calculus removal is a hose formed of a flexible material, and has a distal end 7 as an end inserted into the body through an endoscope and a distal end 7 located at the other end. Proximal part 6. The outer diameter d2 of the proximal end portion 6 of the catheter tube 5 is usually 1.0 to 4.2 mm, and the overall length is usually 500 to 2500 mm.
[0047] In addition, the material of the catheter tube 5 is not particularly limited as long as it is a flexible material, but is preferably a polymer material, and particularly preferably a polyamide resin or a polyamide-based elastomer.
[0048] Such as figure 2As shown,...
no. 2 Embodiment approach
[0089] In the second embodiment of the present invention, the only difference is the use of Image 6 (A) and Image 6 The tubular member 130 shown in (B) replaces the tubular member 30 of the above-mentioned first embodiment, and other structures and effects are the same as those of the first embodiment, and only the different parts will be described below.
[0090] The tubular member 130 is different from the tubular member 30 in that it is a tube molded body preformed into a curved shape so as to bend toward the proximal opening 130 a with a predetermined curvature R. The curvature R is determined so that the guide wire 20 can easily pass between the proximal opening 130 a and the distal opening 130 b inside the tubular member 130 . Such as Image 6 As shown in (B), the proximal end opening 130 a of the tubular member 130 is integrated by bonding with an adhesive or the like to the proximal guidewire insertion hole 10 a formed in the middle of the catheter tube 5 . The di...
no. 3 Embodiment approach
[0092] In the third embodiment of the present invention, the only difference is the use of Figure 7 (A) and Figure 7 The tubular member 230 shown in (B) replaces the tubular member 130 of the above-mentioned second embodiment, and other structures and effects are the same as those of the first embodiment and the second embodiment, and only the different parts will be described below. Be explained.
[0093] This tubular member 230 is different from the tubular member 130 in that a flange portion 232 is integrally formed at the proximal opening 230a of the tubular member 230, and the flange portion 232 is engaged with a catheter tube positioned around the proximal guidewire insertion hole 10a. 5 outer peripheral surface. By adopting such a structure, it becomes easy to integrate the peripheral edge of the proximal opening 230a of the tubular member 230 with the proximal wire insertion hole 10a. In addition, its bonding strength is also improved. Additionally, if Figure 7...
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