초록 ▼

A small diameter steerable guidewire with uniform flexibility in its distal region particularly well suited for PTCA use is provided. The guidewire has a diameter of less than 0.50 mm and is formed from an elongated substantially cylindrical main core wire with a distal cylindrical region of reduced

A small diameter steerable guidewire with uniform flexibility in its distal region particularly well suited for PTCA use is provided. The guidewire has a diameter of less than 0.50 mm and is formed from an elongated substantially cylindrical main core wire with a distal cylindrical region of reduced diameter at the distal end of the core wire. A safety wire is attached to the distal end of the region of reduced diameter and a safety tip attached to the distal end of the safety wire and coil. The safety wire and coil may be formed of a radio opaque material so the position of the wire can be accurately determined when in use.

대표청구항 ▼

A small diameter steerable guidewire comprising: an elongated core wire having a main wire portion with a substantially cylindrical configuration of uniform diameter with a proximal end and a distal end and having a distal cylindrical region of reduced diameter at the distal end; the distal cylindri

A small diameter steerable guidewire comprising: an elongated core wire having a main wire portion with a substantially cylindrical configuration of uniform diameter with a proximal end and a distal end and having a distal cylindrical region of reduced diameter at the distal end; the distal cylindrical region being of uniform diameter which is smaller than the main wire portion; the distal end of the main wire portion formed with a shoulder region with the distal cylindrical region extending from the main wire portion at the shoulder region, the shoulder region providing a sharp transition between the main wire portion and the distal cylindrical region for providing a guidewire having improved uniform bendability; a substantially cylindrical safety wire having a diameter less than the distal cylindrical region secured to the distal end of the distal cylindrical region and extending therefrom; a coil attached to the distal end of the main wire portion surrounding the distal cylindrical region; the coil having a diameter substantially equal to the diameter of the main wire portion for providing a smooth transition between the outer surface of the main wire portion and coil; a safety tip secured to the coil at its distal end, with the safety wire extending from the distal end of the distal cylindrical region to the tip; the coil having a distal region located towards the safety tip and a proximal region located towards the main wire portion, and wherein the turns of the coil are more tightly packed, considered in the axial direction, in the distal region of the coil than in the proximal region of the coil to provide increased bendability to the coil at the proximal region of the coil; and the length of the coil being small relative to the length of the main wire portion.