US 12,324,886 B2
Method for producing balloon catheter
Yoshinori Nakano, Settsu (JP); Yojiro Koga, Settsu (JP); Masahiro Kojima, Settsu (JP); Masato Tsueda, Settsu (JP); and Shintaro Osumi, Settsu (JP)
Assigned to KANEKA CORPORATION, Osaka (JP)
Appl. No. 17/440,617
Filed by KANEKA CORPORATION, Osaka (JP)
PCT Filed Jan. 7, 2020, PCT No. PCT/JP2020/000123
§ 371(c)(1), (2) Date Sep. 17, 2021,
PCT Pub. No. WO2020/194982, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-055202 (JP), filed on Mar. 22, 2019.
Prior Publication US 2022/0161007 A1, May 26, 2022
Int. Cl. A61M 25/10 (2013.01)
CPC A61M 25/1029 (2013.01) 16 Claims
OG exemplary drawing
 
1. A method for producing a balloon catheter comprising:
preparing a balloon producing device, the device including a mold into which a tubular parison is inserted, and a fixing member for fixing the parison outside the mold, the mold including a first section for forming a straight tube portion and a tapered portion of a balloon, a proximal second section and a distal second section present on both sides of the first section in a longitudinal direction, at least one of the proximal and distal second sections provided with a rotation preventing portion abutting the parison so as to prevent rotation of the tubular parison about a longitudinal axis direction of the parison, the rotation preventing portion configured to form a gap between an inner wall surface of the mold and the parison at a portion where the rotation preventing portion exists in a cross-section perpendicular to the longitudinal direction of the mold;
disposing a part of the parison in the longitudinal axis direction in the mold so that the parison contacts with the rotation preventing portion and the gap is formed between the inner wall surface of the mold and the parison;
fixing a portion disposed outside the mold of the parison with the fixing member;
expanding the parison;
removing the parison from the mold; and
cutting the parison at a position corresponding to at least one of the proximal and distal second sections to obtain a balloon catheter, wherein
the distal second section is present at a position corresponding to a distal side of the balloon with respect to the first section and the proximal second section is present at a position corresponding to a proximal side of the balloon with respect to the first section such that the first section is located between the proximal second section and the distal second section.