Catheter with formed guide wire ramp

• US 10,549,069 B2
• Filed: 11/08/2017
• Issued: 02/04/2020
• Est. Priority Date: 10/08/2002
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Boutillette, Michael P., Windheuser, James E., Carrillo, Jr., Oscar R.
• Primary Examiner(s): Gilbert, Andrew M
• Application Number:
  US15/807,559
• Publication Number:
  US 20180064911A1
• Time in Patent Office: 818 Days
• CPC Class Codes: A61M 2025/0008 having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type
• CPC Class Codes: A61M 2025/004 characterized by lumina being arranged circumferentially
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/0188 having slitted or breakaway lumens
• CPC Class Codes: A61M 2025/107 having a longitudinal slit in the balloon
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/0172 Exchanging a guidewire while keeping the catheter in place
• CPC Class Codes: B26D 7/00 Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting cutters B26D1/00; arrangements for guiding hand cutting tools B26B29/06; punching tools or dies, cutting-out knives or dies B26F
• CPC Class Codes: Y10T 83/0405 With preparatory or simultaneous ancillary treatment of work

Abstract

A rapid exchange catheter comprises a guide wire lumen including a substantially sealed portion in which a lumen wall extends around an entire periphery thereof and a channel portion including a channel opening the lumen to an exterior of the catheter, wherein a width of the channel is less than a maximum width of the channel portion. A guide wire ramp extends into the channel portion, with the ramp extending further into the lumen of the channel portion as a distal end of the ramp is approached.

Claims

1. A medical device, comprising:

a tubular member having a distal end and a proximal end;

wherein a first opening is defined in the tubular member at a position that is proximal of the distal end;

wherein a second opening is defined in the tubular member at a position proximal of the first opening;

a channel extending between the first opening and the second opening, the channel being positioned between a first wall surface of the tubular member and a second wall surface of the tubular member;

a deflectable ramp defined by the first wall surface and a ramp wall surface formed by a cut region in the tubular member that extends proximally from the second wall surface.

2. The medical device of claim 1, wherein the deflectable ramp is designed to shift between a first configuration where a tip region of the deflectable ramp is deflected radially inward relative to an outer surface of the tubular member and a second configuration where the tip region of the deflectable ramp is disposed adjacent to the outer surface of the tubular member.

3. The medical device of claim 2, wherein the tip member contacts an inner surface of the tubular member when the deflectable ramp is in the first configuration.

4. The medical device of claim 1, wherein the tubular member includes a lumen.

5. The medical device of claim 4, wherein the lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is smaller than the diameter of the lumen.

6. The medical device of claim 1, wherein the tubular member includes one or more visual markers.

7. The medical device of claim 1, wherein the tubular member includes one or more radiopaque markers.

8. The medical device of claim 1, wherein along at least a portion of the channel, the tubular member has a transverse cross-sectional shape that is C-shaped.

9. A catheter, comprising:

an elongate shaft having a guidewire lumen extending therein, the elongate shaft having an outer surface;

a channel formed along the outer surface, the channel being disposed between a first axially-extending wall surface of the elongate shaft and a second axially-extending wall surface of the elongate shaft; and

a deflectable ramp member defined by the first axially-extending wall surface and a ramp wall surface formed by a proximally-extending angled cut in a wall surface of the elongate shaft, the deflectable ramp member being designed to deflect between a first position in which the deflectable ramp member extends into the guidewire lumen and a second position wherein the deflectable ramp member deflects radially outward toward the outer surface of the elongate shaft.

10. The catheter of claim 9, wherein the elongate shaft includes one or more additional lumens.

11. The catheter of claim 9, wherein the guidewire lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is smaller than the diameter of the guidewire lumen.

12. The catheter of claim 9, wherein the elongate shaft includes one or more visual markers.

13. The catheter of claim 9 wherein the elongate shaft includes one or more radiopaque markers.

14. The catheter of claim 9, wherein along at least a portion of the channel, the elongate shaft has a transverse cross-sectional shape that is C-shaped.

15. The catheter of claim 9, wherein a tip of the deflectable ramp member contacts an inner surface of the elongate shaft when the deflectable ramp member is in the first position.

16. A catheter, comprising:

a tubular member having a lumen extending therein, the tubular member having a tube wall;

a channel formed in the tube wall between a first axially-extending wall region and a second axially-extending wall region; and

a deflectable ramp member formed in the tube wall and defined by the first axially-extending wall region and a ramp wall surface formed by a proximally-extending cut in the tube wall, the deflectable ramp member being designed to shift between a first position in which the deflectable ramp member extends into the lumen and a second position wherein the deflectable ramp member is disposed adjacent to the tube wall of the tubular member.

17. The catheter of claim 16, wherein the lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is smaller than the diameter of the lumen.

18. The catheter of claim 16, wherein the tubular member includes one or more visual markers.

19. The catheter of claim 16, wherein the tubular member includes one or more radiopaque markers.

20. The catheter of claim 16 wherein along at least a portion of the channel, the tubular member has a transverse cross-sectional shape that is C-shaped.