US 12,465,722 B2
Reinforced catheter with tapered proximal lumen
Tomoya Kato, Settsu (JP)
Assigned to KANEKA CORPORATION, Osaka (JP)
Appl. No. 17/619,303
Filed by KANEKA CORPORATION, Osaka (JP)
PCT Filed Jun. 4, 2020, PCT No. PCT/JP2020/022151
§ 371(c)(1), (2) Date Dec. 15, 2021,
PCT Pub. No. WO2020/255736, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-114064 (JP), filed on Jun. 19, 2019.
Prior Publication US 2022/0096791 A1, Mar. 31, 2022
Int. Cl. A61M 25/00 (2006.01); A61M 25/01 (2006.01)
CPC A61M 25/0052 (2013.01) [A61M 25/0071 (2013.01); A61M 25/0136 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A catheter comprising:
a tubular member extending in a longitudinal direction and having a distal end and a proximal end;
a handle connected to a proximal end portion of the tubular member; and
an adhesive, wherein
the tubular member has a reinforced portion including a reinforcing member, and an unreinforced portion including no reinforcing member, the unreinforced portion being positioned at a proximal side of the reinforced portion,
the unreinforced portion is fixed within the handle via the adhesive,
the unreinforced portion has a lumen having a tapered portion, an inner diameter of which is increased in the longitudinal direction toward the proximal end,
the handle has a first lumen, and a second lumen positioned at a proximal side of the handle,
an inner diameter of the first lumen at a proximal end is larger than an inner diameter at a distal end of the second lumen of the handle,
the tubular member and the handle are disposed such that the unreinforced portion is fixed to the first lumen, a proximal end of the unreinforced portion is positioned at the proximal end of the first lumen, and the catheter satisfies formulae (1) to (3):
a<b  (1)
a<c  (2)
b≥c  (3)
where a is an inner diameter at a position apart by 1 mm distally from a proximal end of the reinforced portion of the tubular member, b is an inner diameter at the proximal end of the unreinforced portion of the tubular member, and c is the inner diameter at the distal end of the second lumen of the handle.