Method of forming catheter distal tip
AssigneeBoston Scientific Scimed, Inc.
InventorPu Zhou
Life of this patent
Estimating the term…
Abstract
Catheters such as guide catheters can include a reinforcing braid layer and distal tips in which the reinforcing braid layer does not extend into the distal tip. Such catheters can be formed via a process in which a first polymer segment is secured over a braid layer. The braid layer can be cut through at a cutting position that is proximate a distal end of the first polymer segment and the braid layer extending distally of the cutting position is removed. A second polymer segment that extends over the first polymer segment and that extends distally of the cutting position is secured over the braid layer.
Claims13
A method of forming a catheter, comprising:
- providing a braid layer having a distal end and a proximal end, an inner lubricious liner positioned within the braid layer;
- securing a first polymer segment over the braid layer, the first polymer segment being positioned proximal of the distal end of the braid layer, the first polymer segment having a distal end and a proximal end;
- cutting through the braid layer and the inner lubricious liner at a cutting position proximate the distal end of the first polymer segment and removing a portion of the braid layer that extends distally of the cutting position;
- and
- subsequent to cutting through the braid layer and the inner lubricious liner, securing a second polymer segment over the braid layer, the second polymer segment being positioned such that a proximal end of the second polymer segment is proximal the distal end of the first polymer segment and a distal end of the second polymer segment extends distally of the cutting position,
- wherein the second polymer segment comprises in combination a proximal segment configured to overlay the braid layer, an intermediate segment configured to overlay the first polymer segment, and a distal segment configured to form a distal tip.
A method of forming a catheter, comprising:
- providing a braid layer having a distal end and a proximal end;
- positioning an inner lubricious liner within the braid layer;
- securing a first polymer segment over the braid layer, the first polymer segment being positioned proximal of the distal end of the braid layer;
- cutting through the braid layer at a cutting location proximal of the distal end of the braid layer, thereby forming a catheter sub-assembly including the inner lubricious liner, the braid layer, and the first polymer segment, the catheter sub-assembly having a distal end defined at the cutting location;
- securing a second polymer segment over the catheter sub-assembly, the second polymer segment being positioned such that a proximal end of the second polymer segment is proximal the cutting location and a distal end of the second polymer segment extends distally of the distal end of the catheter sub-assembly;
- and
- forming a portion of the polymeric outer segment into a distal tip for the catheter that is free from the lubricious layer and the braid layer,
- wherein the step of securing the second polymer segment over the catheter sub-assembly is performed subsequent to the step of cutting through the braid layer.
Dependencies are inferred from the claim text.