초록 ▼

A core wire insertable in a catheter guide wire assembly provides a defined degree of rigidity to the catheter assembly to allow the assembly to be maneuvered through the tortuous path of the vascular or other system of a patient. The core wire includes, at its distal end, a paddle having a substant

A core wire insertable in a catheter guide wire assembly provides a defined degree of rigidity to the catheter assembly to allow the assembly to be maneuvered through the tortuous path of the vascular or other system of a patient. The core wire includes, at its distal end, a paddle having a substantially barrel-shaped body, leading to a continuous chamfer which terminates in a truncated end. Further, the core wire can have a curved section adjacent its distal end. The curved section is made by press hardening the generally circular core wire into a substantially rectangular shape such that the press hardened wire memorizes the arc of curvature. When the core wire is press hardened into a rectangular shape, a singular degree of freedom of movement is imparted to the wire in contrast to the two degrees of freedom of movement of the cross-sectionally circular core wire. A method of manufacture is also described using concave/convex mating dies or flat plate dies.

대표청구항 ▼

A formed core catheter guide wire assembly comprising: a smooth surfaced wound wire casing having a closed end and an open end, and an elongated, resilient metal core wire having a distal end and a proximal region, with a portion of said proximal region extending beyond said open end of said casing,

A formed core catheter guide wire assembly comprising: a smooth surfaced wound wire casing having a closed end and an open end, and an elongated, resilient metal core wire having a distal end and a proximal region, with a portion of said proximal region extending beyond said open end of said casing, said core wire being slidably mounted in said casing and having a preformed, continuously curved section adjacent said distal end, said preformed, continuously curved section being flexible and said preformed, continuously curved section maintaining a curved configuration when in a relaxed state for steering of the guide wire assembly through the vascular system of the body, said preformed, continuously curved section having a first part that has a longitudinally attenuated, generally rectangular cross-sectional area and a second part having a substantially uniform, generally rectangular cross-sectional area extending from said first part to said distal end, said proximal region having a substantially circular cross-sectional area, and said core wire including a continuously curved first transitional slope between the circular proximal region and the rectangular first part of said curved section and including a continuously curved second transitional slope between the uniform rectangular second part of said curved section and said distal end.