CA2371893A1 - Balloon catheter with axial flexibility - Google Patents

Balloon catheter with axial flexibility Download PDF

Info

Publication number
CA2371893A1
CA2371893A1 CA002371893A CA2371893A CA2371893A1 CA 2371893 A1 CA2371893 A1 CA 2371893A1 CA 002371893 A CA002371893 A CA 002371893A CA 2371893 A CA2371893 A CA 2371893A CA 2371893 A1 CA2371893 A1 CA 2371893A1
Authority
CA
Canada
Prior art keywords
catheter
core wire
tubular body
distal end
proximal end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002371893A
Other languages
French (fr)
Inventor
Samuel L. Omaleki
Celso J. Bagaoisan
Andres D. Tomas
Isaac J. Kim
Jefferey C. Bleam
Juan T. Domingo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Medtronic Vascular Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2371893A1 publication Critical patent/CA2371893A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/104—Balloon catheters used for angioplasty
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M25/09016—Guide wires with mandrils
    • A61M25/09033—Guide wires with mandrils with fixed mandrils, e.g. mandrils fixed to tip; Tensionable wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M2025/0098—Catheters; Hollow probes having a strain relief at the proximal end, e.g. sleeve
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09008—Guide wires having a balloon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09175—Guide wires having specific characteristics at the distal tip
    • A61M2025/09183—Guide wires having specific characteristics at the distal tip having tools at the distal tip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1079—Balloon catheters with special features or adapted for special applications having radio-opaque markers in the region of the balloon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1093—Balloon catheters with special features or adapted for special applications having particular tip characteristics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility

Abstract

A balloon catheter having improved flexibility in and about its distal end i s provided. The flexibility of the catheter is determined in part by improving the properties of a wire or catheter located within the area where the ballo on is mounted. In one aspect of the present invention, connecting wires extend through the balloon from the distal end of a catheter body to the proximal e nd of a core wire. The core wire extends distally away from the connecting wire s and the catheter body. In another aspect of the present invention, a core wi re is provided having a proximal end extending within the balloon into the catheter tubular body but is not mounted therein. This allows the proximal e nd of the core wire to "float" within the tubular body, such that when the catheter is advanced through the vasculature of a patient, the core wire may move longitudinally within the tubular body. In another aspect of the presen t invention, the balloon is mounted over a tubular body which is configured to give the catheter longitudinal flexibility.

Description

IN I
ERNATIUNAL International 5tA1tCa1 Application hitl'Uhi No PC1~US

C.(Continuation) DOCUMENTS
CONSIDERED
TO
BE
RELEVANT

CategoryCiiaiion of documeni, wdh indicaiion,where Relevant lc ' ~ apprdp~inie, ofltm retevsi~i Massages cloim No.

Y US 5 782 809 A (KUGO ET AL.) 6,7, 21 July 1998 (1998-07-21) 16-23 abstract column 1, line 59 -column 2, line 3 column 3, line 16 - line 65 column 6, line 47 -column 7, line 7;

figures 3-7 Y EP 0 652 026 A (MAYO FOUNDATION) 8,9,12, May 1995 (1995-05-10) 19 abstract column 2, line 17 - line 30 column 4, line 40 -column 5, line 10 column 5, line 32 - line 59; figures 2,7,8 Y US 5 746 701 A (NOONE) 13-15 5 May 1998 (1998-05-05) abstract; figures 6,8-11 ref.no.: 67,84,97,107,117 i i I

Form FcTnSA2lo (continuation of second sheet) (July 1992) page 2 of 2 Intern~ional application No.
INTERNATIONAL SEARCH REPORT r'CT/US 00/04367 I Box I Observations where certain claims were found unsearchabie (Continuation of item i of first sheet]
This International Search Report has not been established in respect of certain claims under Article 17(2)(a) for the following reasons:
Q Claims Nos.: 2$
because they relate to subject matter not required to be searched by this Authority, namely:
Rule 39.1(iv) PCT - Method for treatment of the human or animal body by surgery 2. ~ Claims Nos.:
because they relate to parts of the International Application that do not comply with the prescribed requirements to such an extent that no meaningful International Search can be carried out, specifically:
3. ~ Claims Nos.:
because they are dependent claims and are not drafted in accordance with the second and third sentences of Rule 6.4(a).
Box II Observations where unity of invention is lacking (Continuation of item 2 of first sheet) This International Searching Authority found multiple inventions in this international application, as follows:
see additional sheet 1. ~ As all required additional search fees were timely paid by the applicant, this International Search Report covers all searchable claims.
2. ~ As all searchable claims could be searched without effort justifying an additional fee, this Authority did not invite payment of any additional fee.
3. ~ As only some of the required additional search fees were timely paid by the applicant, this International Search Report covers only those claims for which fees were paid, specifically claims Nos.:
4. ~ No required additional search fees were timely paid by the applicant.
Consequently, this International Search Report is restricted to the invention first mentioned in the claims; it is covered by claims Nos.:

Remark on Protest ~ The additional search fees were accompanied by the applicant's protest.
No protest accompanied the payment of additional search fees.
Form PCT/ISA/210 (continuation of first sheet (1 )) (July 1998) International Application No. ~'~TIUS 00 /04367 1. Claims: 1-27 A balloon catheter with a weekened tube structure of the distal part to provide longitudinal flexibility 2. Claims: 29-43, 54,55 A catheter having elements to connect the proximal end of a core wire with the distal end of the catheter tubing with the distal end of the catheter tubing 3. Claims: 44-53, 56-62 A catheter with a core wire extending proximally unattached into the catheter lumen INTERNATIONAL SEARCH REPORT
Intemationa) Application No I nation on patent family members pCT~US 00/04367 Patent document Publication ~ Patent family ~ Publication c-fired in search report I date members) date Fom~ PCTlISA210 (patent family anne:) (July 1992)

Claims (62)

WHAT IS CLAIMED IS:
1. A catheter, comprising:
an elongate tubular body having a proximal section and a distal section and a lumen extending therethrough; and an expandable member mounted to the distal section;
wherein the distal section is configured to axially expand in response to expansion of the expandable member.
2. The catheter of Claim 1, wherein the expandable member is a compliant inflatable balloon.
3. The catheter of Claim 1, where the expandable member has a proximal end and a distal end that are both mounted to the tubular body.
4. The catheter of Claim 1, wherein cuts are provided in the distal section of the tubular body.
5. The catheter of Claim 4, wherein the cuts are provided in the tubular body within the area of the expandable member.
6. The catheter of Claim 4, wherein the cuts are provided in the tubular body proximal to the expandable member.
7. The catheter of Claim 4, wherein the cuts have a decreasing width toward a distal end of the tubular body.
8. The catheter of Claim 4, wherein cuts are provided only partially through the tubular body.
9. The catheter of Claim 8, wherein the cuts provided only partially through the tubular body have a gradually increasing depth toward a distal end of the tubular body.
10. The catheter of Claim 4, further comprising a sleeve provided over the cuts to prevent fluid from escaping the lumen through the cuts.
11. The catheter of Claim 1, further comprising a radiopaque marker for attachment to a medical wire or catheter, the marker receiving cuts to provide the marker with longitudinal flexibility.
12. The catheter of Claim 4, wherein the cuts provide the marker with a coiled configuration.
13. The catheter of Claim 1, further comprising a core wire extending proximally into the distal section of the elongate tubular body to provide support thereto.
14. The catheter of Claim 13, wherein the core wire extends distally from the elongate tubular body.
15. The catheter of Claim 13, wherein the core wire has a proximal taper and a distal taper.
16. A catheter. comprising:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough; and an expandable member mounted to the distal end of the tubular body;
wherein the tubular body has a coiled section that extends at least partially within the expandable member to provide the tubular body with longitudinal flexibility upon actuation of the expandable member.
17. The catheter of Claim 16, wherein the coiled section of the tubular body has a constant width and pitch.
18. The catheter of Claim 16, wherein the coiled section has a gradually decreasing width.
19. The catheter of Claim 16, wherein the coiled section has an angle that gradually increases in a distal direction.
20. The catheter of Claim 16, wherein the coiled section extends proximally of the expandable member.
21. A catheter, comprising:
an elongate body having a proximal end and a distal end; and an expandable member mounted to the distal end;
wherein the elongate body receives cuts at least partially proximal to the expandable member.
22. The catheter of Claim 21, wherein the elongate body is tubular and has a lumen extending therethrough.
23. The catheter of Claim 22, wherein the cuts in the elongate body extend to the lumen.
24. The catheter of Claim 23, further comprising a sleeve surrounding the cuts proximal to the expandable member to prevent fluids from escaping the lumen.
25. A catheter, comprising:
an elongate assembly having a distal portion; and a balloon mounted an the distal portion of the elongate assembly, said balloon comprised of a sheet material attached to the elongate assembly at spaced locations such that the sheet material between said locations expands outwardly in response to inflation pressure to inflate said balloon, said elongate assembly being axially expandable between said spaced locations to accommodate changes in the balloon shape as said balloon is inflated, whereby stresses in said balloon are reduced.
26. The catheter of Claim 25, wherein the elongate assembly comprises:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough; and a core wire having a proximal end and a distal end, wherein the proximal end of the core wire extends into the lumen of the tubular body at the distal end and is capable of longitudinal movement therein, and the distal end of the core wire extends out of the lumen of the tubular body at the distal end;
wherein the balloon is attached at one location to the distal end of the tubular body and is attached at another location to the core wire.
27. The catheter of Claim 25, wherein the distal portion of the elongate assembly comprises a coiled hypotube.
28. A method, comprising:
providing a catheter comprised of an elongate assembly having a balloon thereon;
inflating said balloon in a body lumen; and axially elongating a portion of the elongate assembly within the balloon during inflation of the balloon to reduce stresses on the balloon material.
29. A catheter, comprising:
an elongate body having a proximal end and a distal end;
at least one connecting wire, the wire having a proximal end and a distal end, the proximal end of the wire being mounted to the distal end of the elongate body and the distal end of the wire extending past the distal end of the elongate body; and a core wire having a proximal end connected to the distal end of the connecting wire and extending distally therefrom.
30. The catheter of Claim 29, further comprising an expandable member having a proximal end mounted to the distal end of the elongate body and a distal end surrounding the core wire.
31. The catheter of Claim 29, wherein two connecting wires connect the elongate body to the proximal end of the core wire.
32. The catheter of Claim 29, wherein at least one coil extends from the distal end of the elongate body and surrounds the at least one connecting wire and the core wire.
33. The catheter of Claim 32, wherein the at least one coil comprises a first coil surrounding the at least one connecting wire and a second coil surrounding the core wire.
34. A medical device, comprising:
an elongate body having a proximal end and a distal end;
an expandable member mounted to the distal end of the elongate body;
a core wire lying along substantially the same longitudinal axis as the elongate body, the core wire having a proximal end and a distal end, wherein the proximal end of the core wire is located within the expandable member and is spaced distally from the distal end of the elongate body; and means for connecting the elongate body to the core wire.
35. The medical device of Claim 34, wherein the means for connecting the elongate body to the core wire includes at least one connecting wire.
36. The medical wire of Claim 35, wherein the means for connecting the elongate body to the core wire includes two connecting wires.
37. The medical wire of Claim 34, wherein the means for connecting the elongate body to the core wire includes at least one coil.
38. A catheter, comprising:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough;
an expandable member mounted over the distal end of the tubular body;

a core wire lying along substantially the same longitudinal axis as the tubular body, the core wire having a proximal end and a distal end, the proximal end of the core wire being distally spaced from the distal end of the tubular body outside of the lumen; and a plurality of connecting wires connecting the distal end of the tubular body to the core wire.
39. The catheter of Claim 38, wherein the connecting wires converge distally from the tubular body to the core wire.
40. The catheter of Claim 38, wherein each of the connecting wires has flattened ends.
41. The catheter of Claim 38, further comprising at least one coil extending from the distal end of the tubular body within the expandable member.
42. The catheter of Claim 41, wherein the expandable member has a proximal end mounted over the distal end of the tubular body and a distal end mounted over the coil.
43. The catheter of Claim 42, wherein the proximal end of the core wire is positioned within the expandable member.
44. A catheter, comprising:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough;
a core wire having a proximal end and a distal end, wherein the proximal end of the core wire extends into the lumen of the tubular body and the distal end extends distally away from the tubular body, and wherein a portion of the core wire is positioned coaxially inside the lumen to create an annular space between the core wire and the tubular body, the annular space extending around the core wire over the entire length of that portion of the core wire inside the lumen; and an expandable member having a proximal end mounted over the distal end of the tubular body and a distal end mounted over the core wire distal to the tubular body.
45. The catheter of Claim 44, wherein the expandable member is an inflatable balloon.
46. The catheter of Claim 44, further comprising a stopping mechanism to prevent the proximal end of the core wire from escaping the lumen at the distal end of the tubular body.
47. The catheter of Claim 44, wherein the core wire has an increased dimension at its proximal end.
48. The catheter of Claim 47, wherein the lumen of the tubular body has an inner dimension distal to the proximal end of the core wire that is less than the dimension of the proximal end of the core wire.
49. The catheter of Claim 48, wherein the tubular body is crimped near its distal end to prevent the proximal end of the core wire from escaping the lumen.
50. The catheter of Claim 44, further comprising an adapter attached to the proximal end of the elongate tubular body, the adapter containing a chamber.
51. The catheter of Claim 50, wherein the proximal end of the core wire extends into the chamber.
52. The catheter of Claim 51, wherein the core wire has an increased dimension at its proximal end.
53. The catheter of Claim 52, wherein the chamber has an inner dimension distal to the proximal end of the core wire that is less than the dimension of the proximal end of the core wire to prevent the proximal end of the core wire from escaping the chamber.
54. A catheter, comprising:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough;

a core wire having a proximal end and a distal end, the proximal end of the core wire extending into the lumen at the distal end but remaining unattached thereto; and a flexible member connecting the tubular body to the core wire.
55. The catheter of Claim 54, wherein the flexible member is an inflatable balloon.
56. A medical catheter, comprising:
an elongate tubular body having a proximal end and a distal end and a lumen extending therethrough; and a core wire having a proximal taper and a distal taper extending from the distal end of the tubular body.
57. The catheter of Claim 56, wherein the proximal taper of the core wire extends into the lumen of the tubular body at the distal end.
58. The catheter of Claim 56, wherein the core wire has a section of substantially constant diameter between the proximal taper and distal taper.
59. The catheter of Claim 58, wherein the section of substantially constant diameter is crimped to the tubular body.
60. The catheter of Claim 56, wherein the core wire has a section of substantially constant diameter proximal to the proximal taper.
61. The catheter of Claim 56, wherein the core wire extends into the lumen at the distal end over a length of about 10 to 100 mm to provide additional structural support to the tubular body.
62. The catheter of Claim 56, further comprising an expandable member mounted to the distal end of the tubular body.
CA002371893A 1999-02-22 2000-02-22 Balloon catheter with axial flexibility Abandoned CA2371893A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/253,591 1999-02-22
US09/253,591 US6500147B2 (en) 1999-02-22 1999-02-22 Flexible catheter
PCT/US2000/004367 WO2000050113A2 (en) 1999-02-22 2000-02-22 Balloon catheter with axial flexibility

Publications (1)

Publication Number Publication Date
CA2371893A1 true CA2371893A1 (en) 2000-08-31

Family

ID=22960907

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002371893A Abandoned CA2371893A1 (en) 1999-02-22 2000-02-22 Balloon catheter with axial flexibility

Country Status (7)

Country Link
US (2) US6500147B2 (en)
EP (1) EP1154817B1 (en)
JP (1) JP3704043B2 (en)
AU (1) AU3702400A (en)
CA (1) CA2371893A1 (en)
DE (1) DE60014857D1 (en)
WO (1) WO2000050113A2 (en)

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EP1154817A2 (en) 2001-11-21
WO2000050113A3 (en) 2000-12-07
AU3702400A (en) 2000-09-14
US20020007146A1 (en) 2002-01-17
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WO2000050113A2 (en) 2000-08-31
US20030060802A1 (en) 2003-03-27

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