Support catheter with enhanced torque response and high pushability
AssigneesBoston Scientific Medical Device Limited, Boston Scientific Scimed, Inc.
InventorsSUMIT MALIK, ABHISHEK BINDRA, JOEL M. WASDYKE, MAHENDRA PRATAP SINGH
Life of this patent
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Abstract
A support catheter may be used in combination with a guidewire or other medical device. The support catheter may be adapted to provide both high pushability and good torque response. The elongate shaft of the support catheter may include a polymeric inner layer, stainless steel braided layer disposed over the polymeric inner layer, and a polymeric blend layer that is extruded directly over the stainless-steel braided layer. The construction of the elongate shaft may provide the support catheter with a pushability value of at least 900 grams per centimeter and a torque response value of less than 300 degrees.
Claims20
A support catheter comprising:
- an elongate shaft extending from a proximal region to a distal region, the elongate shaft comprising:
- a polymeric inner layer extending from the proximal region to the distal region;
- a stainless-steel braided layer exterior to the polymeric inner layer and extending from the proximal region to the distal region;
- and
- a polymeric blend outer layer partially embedded within the stainless-steel braided layer, the polymeric blend outer layer comprising a blend of polyether block amide (PEBA) polymers;
- wherein the elongate shaft is adapted to provide a pushability value of at least 900 grams per centimeter and a torque response value of less than 300 degrees.
A support catheter adapted for use with a guidewire in order to provide additional support to the guidewire, the support catheter comprising:
- an elongate shaft having a proximal end and a distal end, the elongate shaft including:
- a perfluoro inner layer extending continuously from the proximal end to the distal end;
- a stainless-steel braided layer exterior to the perfluoro inner layer and extending continuously from the proximal end to the distal end;
- and
- a polymeric outer layer extending continuously from the proximal end to the distal end, the polymeric outer layer surrounding and partially embedded within the stainless-steel braided layer, the polymeric outer layer comprising a blend of VESTAMID® Care PEBA polymers;
- a distal tip joined to the elongate shaft at a butt joint at the distal end of the elongate shaft;
- wherein the elongate shaft is adapted to provide a pushability value of at least 900 grams per centimeter and a torque response value of less than 300 degrees.
A support catheter, the support catheter comprising:
- an elongate shaft extending from a proximal end to a distal end, the elongate shaft including:
- a polymeric inner layer extending continuously from the proximal end to the distal end;
- a braided layer surrounding the polymeric inner layer and extending continuously from the proximal end to the distal end;
- and
- a polymeric blend outer layer extending continuously from the proximal end to the distal end, the polymeric blend outer layer surrounding and partially embedded within the braided layer, the polymeric blend outer layer comprising a blend of polyether block amide (PEBA) polymers;
- a distal tip secured to the distal end of the elongate shaft via a butt joint;
- and
- a plurality of radiopaque marker bands disposed within the distal region proximal of the butt joint;
- wherein the support catheter is adapted to provide a pushability value of at least 900 grams per centimeter and a torque response value of less than 300 degrees.
Dependencies are inferred from the claim text.