US 12,611,526 B2Granted

Method for producing balloon catheter

AssigneeKaneka Corporation

InventorsYojiro Koga, Masahiro Kojima, Yoshinori Nakano, Masato Tsueda

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Abstract

The method for producing a balloon catheter comprises a tubular object preparing step to prepare a tubular object having a space extending in the distal-proximal direction, a balloon preparing step to prepare a balloon, a balloon placement step to place the balloon in the tubular object and inflate the balloon, and a balloon deflating step to deflate the balloon and form a wing-shaped portion, wherein a projecting portion is placed on within a mean circle C1 centered at a center P1 of the tubular object, and a radius of the mean circle C1 is an average value of a shortest distance D1 from the center P1 of the tubular object to an inside surface P2 of the tubular object and a longest distance D2 from the center P1 of the tubular object to the inside surface P3 of the tubular object on a cross-section in the balloon placement step.

Claims20

Dependent claims

A method for producing a balloon catheter, comprising:

a balloon placement step to place a balloon catheter in an inner space of a tubular object and inflate a balloon by pressurizing an inside of the balloon, the balloon catheter having a shaft extending in a distal-proximal direction and the balloon provided on a distal side of the shaft and having a projecting portion on an outer surface, and the inner space extending in the distal-proximal direction, and
a balloon deflating step to deflate the balloon and form a wing-shaped portion by depressurizing the inside of the balloon,
wherein on a single cross-section of the tubular object perpendicular to the distal-proximal direction, the inner space of the tubular object has a shortest portion at which a distance from a center of a figure with an outer shape of the inner space of the tubular object as an outline to an inner surface of the tubular object is shortest and a longest portion at which a distance from the center of the figure with the outer shape of the inner space of the tubular object as the outline to the inner surface of the tubular object is longest,
in the balloon placement step and before the balloon deflating step, on the same cross-section, the projecting portion is placed on the inside of a mean circle centered at the center of the figure with the outer shape of the inner space of the tubular object as the outline, and a radius of the mean circle is an average value ((D1+D2)/2) of a shortest distance (D1) from the center of the figure with the outer shape of the inner space of the tubular object as the outline to an inner surface of the tubular object at the shortest portion and a longest distance (D2) from the center of the figure with the outer shape of the inner space of the tubular object as the outline to the inner surface of the tubular object at the longest portion.

1 more element

A method for producing a balloon catheter, comprising:

a balloon placement step to place a balloon catheter in an inner space of a tubular object and inflate a balloon by pressurizing an inside of the balloon, the balloon catheter having a shaft extending in a distal-proximal direction and the balloon provided on a distal side of the shaft and having a projecting portion on an outer surface, and the inner space extending in the distal-proximal direction and having a plurality of groove portions extending in the distal-proximal direction, and
a balloon deflating step to deflate the balloon and form a wing-shaped portion by depressurizing the inside of the balloon,
wherein on a single cross-section of the tubular object perpendicular to the distal-proximal direction, the inner space of the tubular object has a shortest portion at which a distance from a center of a figure with an outer shape of the inner space of the tubular object as an outline to an inner surface of the tubular object is shortest and a longest portion at which a distance from the center of the figure with the outer shape of the inner space of the tubular object as the outline to the inner surface of the tubular object is longest,
in the balloon placement step and before the balloon deflating step, on the same cross-section, the projecting portion is placed on the inside of a mean circle centered at the center of the figure with the outer shape of the inner space of the tubular object as the outline, and a radius of the mean circle is an average value ((D1+D2)/2) of a shortest distance (D1) from the center of the figure with the outer shape of the inner space of the tubular object as the outline to an inner surface of the tubular object at the shortest portion and a longest distance (D2) from the center of the figure with the outer shape of the inner space of the tubular object as the outline to the inner surface of the tubular object at the longest portion, and
wherein the projecting portion is positioned inside of the groove portion in the balloon placement step.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/640,882Filed 24 Aug 2020
Priority: JP 2019-1638589 Sep 2019
Published: US 2022/0323728 A113 Oct 2022
Granted: 28 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

A61M 25/1029
Making of balloon catheters: production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of…
A61M 25/1038
Making of balloon catheters: wrapping or folding devices for use with balloon catheters
A61M
Devices for delivering substances into the body