Guiding member with deflectable tip
First Claim
1. A guide member for vascular catheters having a deflectable distal tip comprising:
- a. an elongated tubular member having a distal end;
b. an elongated core element disposed within the tubular member and having a tapered distal portion which extends out the distal end of the tubular member;
c. disposed about the tapered distal portion of the core element which extends out of the distal end of the tubular member, a helical coil element which has a proximal and distal ends, which has an expanded coil section at a location proximal to and spaced from the distal end of the coil element, which is secured to the core element at a location distal to the expanded coil section and proximal to the distal end of the coil and which has a rounded plug at the distal end thereof;
d. an elongated reference element which is secured to an adjacent side of the helical coil element at a first location proximal to the expanded coil section and at a second location distal to the location where the coil section element is secured to the core element;
e. means to provide columnar support to the proximal end for the coil; and
f. means to axially move the core element with respect to the coil element along the longitudinal axis thereof, such longitudinal movement causing the expanded coil section to change the spacing between the turns thereof along the side of the coil opposite to the side adjacent to the reference element resulting in the deflection of the distal tip of the guide member.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is directed to a guiding member for vascular catheters, particularly dilatation catheters for angioplasty procedures having a deflectable tip. The guiding member generally includes an elongated core wire having a tapered distal portion, a coil encasing at least part of the tapered distal portion of a core wire. The coil has an expanded section, and a reference member disposed therein which is secured to the coil proximally and distally of the expanded coil section. The core wire is secured to the coil at a location distally of the expanded section but proximally to the distal tip of the coil. Relative axial movement between the core wire and the coil causes expansion or contraction of the expanded coil section which results in tip deflection.
-
Citations
26 Claims
-
1. A guide member for vascular catheters having a deflectable distal tip comprising:
-
a. an elongated tubular member having a distal end; b. an elongated core element disposed within the tubular member and having a tapered distal portion which extends out the distal end of the tubular member; c. disposed about the tapered distal portion of the core element which extends out of the distal end of the tubular member, a helical coil element which has a proximal and distal ends, which has an expanded coil section at a location proximal to and spaced from the distal end of the coil element, which is secured to the core element at a location distal to the expanded coil section and proximal to the distal end of the coil and which has a rounded plug at the distal end thereof; d. an elongated reference element which is secured to an adjacent side of the helical coil element at a first location proximal to the expanded coil section and at a second location distal to the location where the coil section element is secured to the core element; e. means to provide columnar support to the proximal end for the coil; and f. means to axially move the core element with respect to the coil element along the longitudinal axis thereof, such longitudinal movement causing the expanded coil section to change the spacing between the turns thereof along the side of the coil opposite to the side adjacent to the reference element resulting in the deflection of the distal tip of the guide member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A steerable dilatation catheter having a deflectable distal tip, comprising:
-
(a) an outer tubular member having an inflatable balloon near the distal end thereof; (b) an inner tubular member having an inner lumen therein disposed within the outer tubular member and defining an annular passageway between the inner and outer tubular members to direct inflation liquid to the interior of the inflatable balloon; (c) an elongated core element having a tapered distal portion and being disposed within the inner lumen of the inner tubular member with a tapered distal portion of the core element extending out of the distal end of the inner tubular member; (d) disposed about the tapered distal portion of the core element which extends out of the distal end of the tubular member, a helical coil element which has proximal and distal ends, which has an expanded coil section at a location proximal to and spaced from the distal end of the coil element, which is secured to the core element at a location distal to the expanded coil section and proximal to the distal end of the coil element and which has a rounded plug at the distal end thereof; (e) an elongated reference element which is secured to an adjacent side of the coil element at a first location proximal to the expanded coil section and at a second location distal to the location where the core element is secured to the coil element; (f) means to provide columnar support to the proximal end of the coil; and (g) means to axially move the core element with respect to the coil element along the longitudinal axis thereof, such longitudinal movement causing the expanded coil section to change the spacing between the turns thereof along the side of the expanded coil opposite to the side adjacent to the reference member resulting in the deflection of the distal tip of the catheter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
Specification