Catheter shape retainer
AssigneeTerumo Kabushiki Kaisha
InventorsTakashi KITAOKA, Taishi NIIMI, Takayuki UCHIDA, Yu OSAWA
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Abstract
A catheter shape retainer includes a retainer main body inserted and disposed in an inner lumen of a catheter to retain a cylindrical shape of the catheter, and a movement restrictor disposed closer to a distal portion of the retainer main body than a proximal portion of the retainer main body to restrict the catheter from moving toward the proximal portion of the retainer main body. When a portion of the retainer main body including the distal portion of the retainer main body is inserted into a living body, a portion of the retainer main body located outside the living body has a length longer than a total length of a puncture device.
Claims18
A catheter shape retainer configured to pass through an inner lumen of a puncture device and to pierce a living body and to retain a cylindrical shape of an elongated catheter inserted into the living body, the catheter shape retainer comprising:
- a retainer main body inserted and disposed in an inner lumen of the catheter to retain the cylindrical shape of the catheter;
- a movement restrictor disposed closer to a distal portion of the retainer main body than a proximal portion of the retainer main body to restrict the catheter from moving toward the proximal portion of the retainer main body over the movement restrictor;
- and
- wherein, when a portion of the retainer main body including the distal portion of the retainer main body is inserted into the living body, a portion of the retainer main body located outside the living body has a length longer than a total length of the puncture device.
A system configured to pierce a living body, the system comprising:
- a puncture device configured to pierce the living body;
- an elongated catheter configured to be inserted into an inner lumen of the puncture device and into the living body;
- a catheter shape retainer configured to be inserted into an inner lumen of the catheter, the catheter shape retainer including a retainer main body and a movement restrictor disposed closer to a distal portion of the retainer main body than a proximal portion of the retainer main body to restrict the catheter from moving toward the proximal portion of the retainer main body over the movement restrictor.
A method for retaining a cylindrical shape of an elongated catheter inserted into a living body, the method comprising:
- piercing a living body with a puncture device;
- inserting a catheter assembled with a catheter shape retainer to retain the cylindrical shape of the catheter into an inner lumen of the puncture device;
- and
- wherein the catheter shape retainer including a retainer main body and a movement restrictor disposed closer to a distal portion of the retainer main body than a proximal portion of the retainer main body to restrict the catheter from moving toward the proximal portion of the retainer main body over the movement restrictor, and when a portion of the retainer main body including the distal portion of the retainer main body is inserted into the living body, a portion of the retainer main body located outside of the living body has a length longer than a total length of the puncture device.
Dependencies are inferred from the claim text.