Rapid exchange high pressure transition for high pressure catheter with non-compliant balloon

• US 5,690,613 A
• Filed: 12/06/1996
• Issued: 11/25/1997
• Est. Priority Date: 12/06/1996
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Verbeek, Maurice T.Y.
• Primary Examiner(s): Dawson, Glenn K.
• Application Number:
  US08/759,696
• Time in Patent Office: 354 Days
• Field of Search: 604/96-104, 604/282, 128/898, 606/191-200, 606/108, 600/201, 600/204, 600/207
• US Class Current: 604/103
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1036 Making parts for balloon catheter systems, e.g. shafts or distal ends A61M25/1029 takes precedence
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A medical catheter is provided which includes a core wire extending longitudinally through inflation tubing. The inflation tubing defines an inflation lumen. The distal end of the inflation tubing extends longitudinally through a tubular first reinforcement band which terminates distal to the distal end of the inflation tubing. An inner lumen tube defines a guidewire lumen, the inner lumen tube being biaxial with the inflation tubing and running longitudinally along the outer diameter of the inflation tubing. The inner lumen tube extends longitudinally through a shim tube which has a longitudinal slit running along its top side. The inner lumen tubing which has the shim coaxially bonded thereon extends longitudinally through a shaft tube. The inflation tube with the first reinforcement band coaxially bonded thereon also extends longitudinally through the shaft tube. The shaft tube is bonded to the inner lumen tube and to the inflation tube. A metal piece may be bonded to the inflation tube. An inflatable balloon is mounted at the distal end of the shaft tube, the balloon is in fluid communication with the inflation lumen.

Claims

1. A medical catheter comprising:

a proximal section having a proximal end and a distal end;

a transition section having a proximal end and a distal end;

a balloon section having a proximal end and a distal end, the distal end of the proximal section being affixed to the proximal end of the transition section, the distal end of the transition section being affixed to the proximal end of the balloon section, the balloon section having a balloon mounted at the distal end, the transition section further comprising;

an inflation tube defining an inflation lumen, the inflation tubing having an inner diameter, an outer diameter, a proximal end and a distal end, the balloon being in fluid communication with the inflation lumen;

a first reinforcement band having a distal end and a proximal end, the distal end of the inflation tube extending longitudinally through the first reinforcement band, the distal end of the first reinforcement band terminating distal to the distal end of the inflation tube;

an inner lumen tube defining a guidewire lumen, the inner lumen tube being biaxial with the inflation tubing and running longitudinally along the outer diameter of the inflation tubing;

a shim tube, the inner lumen tube extending longitudinally through the shim tube, the shim tube having a proximal end and a distal end;

a shaft tube defining a shaft lumen; and

the inner lumen tube having the shim tube coaxially bonded thereon extending longitudinally through the lumen of the shaft tube, the inflation tube with the first reinforcement band coaxially bonded thereon also extending longitudinally through the lumen of the shaft tube, the shaft tube being bonded to the inner lumen tube and to the inflation tube.

2. A catheter according to claim 1 wherein the inflation tube has a core wire extending longitudinally therethrough.

3. A catheter according to claim 1 wherein the shim tube has a longitudinal slit running along a top portion of the shim tube.

4. A catheter section according to claim 1 wherein the first reinforcement band is necked down over the distal end of the inflation tube such that the distal end of the shim tube is aligned with the distal end of the first reinforcement band.

5. A catheter according to claim 1 wherein the inflation tube is necked down proximal to the proximal end of the first reinforcement band, the necked down portion of the inflation tube abuts the proximal end of the first reinforcement band.

6. A catheter according to claim 1 wherein the shaft is necked down distal to and abutting the distal end of the shim.

7. A catheter according to claim 1 wherein a metal piece having a proximal end and a distal end is bonded to an inner surface of the inflation tube.

8. A catheter according to claim 7 wherein the proximal end of the shim tube is distal to the distal end of the metal piece.

9. A catheter according to claim 7 wherein the metal piece is made of a radiopaque material.

10. A catheter according to claim 1 wherein the first reinforcement band extends beyond the inflation tube by at least 5 mm.

11. A catheter according to claim 1 wherein the first reinforcement band is made of irradiated LDPE.

12. A catheter according to claim 1 wherein the shim tube is at least about 10 mm long.

13. A catheter according to claim 1 having a second reinforcement band, the second reinforcement band having a distal end and a proximal end, the inflation tube extending longitudinally through the second reinforcement band, the second reinforcement band distal end being proximal to the first reinforcement band proximal end.

14. A medical catheter comprising:

a proximal section having a proximal end and a distal end;

a transition section having the proximal end and a distal end;

a balloon section having a proximal end and a distal end, the distal end of the proximal section being affixed to the proximal end of the transition section, the distal end of the transition section being affixed to the proximal end of the balloon section, the balloon section having a balloon mounted at the distal end, the transition section further comprising;

an inflation tube, the inflation tube defining an inflation lumen, the inflation tube having an inner diameter, an outer diameter, a proximal end and a distal end, the balloon being in fluid communication with the inflation tube;

a first reinforcement band having a distal end and a proximal end, the distal end of the inflation tube extending longitudinally through a first reinforcement band, the distal end of the first reinforcement band terminating distal to the distal end of the inflation tube, the first reinforcement band being necked down over the distal end of the inflation tube, the inflation tube being necked down proximal to the proximal end of the first reinforcement band, the necked down portion of the inflation tube abutting the proximal end of the first reinforcement band;

an inner lumen tube defining a guidewire lumen, the inner lumen tube being biaxial with the inflation tubing and running longitudinally along the outer diameter of the inflation tubing;

a shim tube, the inner lumen tube extending longitudinally through the shim tube, the shim tube having a proximal end and a distal end, the distal end of the shim tube being aligned with the distal end of the first reinforcement band, the shim tube having a longitudinal slit running along a top portion of the shim tube;

a shaft tube defining a shaft lumen; and

the inner lumen tube having the shim tube coaxially bonded thereon extending longitudinally through the shaft tube, the inflation tube with the first reinforcement band coaxially bonded thereon also extending longitudinally through the shaft tube, the shaft tube being bonded to the inner lumen tube and to the inflation tube, the shaft being necked down distal to and abutting the distal end of the shim tube.

15. A transition section according to claim 14 wherein a core wire extends longitudinally through the inflation lumen.

16. A transition section according to claim 14 wherein the first reinforcement band and the shim tube are made of LDPE.

17. A transition section according to claim 14 wherein the inner lumen tube is made of HDPE.

18. A transition section according to claim 14 wherein a metal piece is bonded to the inflation tube.

19. A transition section according to claim 14 wherein the proximal end of the shim tube is distal to the distal end of the metal piece.

20. A transition section according to claim 14 having a second reinforcement band, the second reinforcement band having a distal end and a proximal end, the inflation tube extending longitudinally through the second reinforcement band, the second reinforcement band distal end being proximal to the first reinforcement band proximal end.

21. A medical catheter comprising:

a proximal section, a balloon section and a transition section therebetween, the transition section further comprising;

a shaft tube;

inflation lumen means for fluid communication with the balloon section, the inflation lumen means within the shaft tube;

metal reinforcing means for interior reinforcement of the inflation lumen means;

band reinforcing means for exterior reinforcement of the inflation lumen means at a distal end of the inflation lumen means, the band reinforcing means bonded to the inflation lumen means and to the shaft tube;

guidewire lumen means within the shaft tube in side-by side relation with the inflation lumen means; and

shim means for filling the space between the guidewire lumen means, the shaft tube and the band reinforcing means;

the shim means bonded to the guidewire tureen means, the shaft tube and the band reinforcing means.

22. A method for making a medical catheter comprising the steps of:

providing an inflation lumen tube;

providing a reinforcing tube;

applying the reinforcing tube to the inflation lumen tube by shrinking the reinforcing tube into contact with an end of the inflation lumen tube;

providing a guidewire lumen tube;

providing a shim of material having a melting temperature which is less than the melting temperature of the guidewire lumen tube and less than the melting temperature of the reinforcing tube;

applying the shim around the guidewire lumen tube;

providing a heat shrinkable shaft tube;

inserting the guidewire lumen tube and shim and the inflation lumen tube and reinforcing tube into the shaft tube; and

heating the shaft tube to a temperature such that the shaft tube shrinks and the shim melts to bond the guidewire lumen tube, the shaft and reinforcing tube.