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Patent · US10071224B2 · B2 · US

Coaxial bi-directional catheter

(11) Publication number
US10071224B2
(21) Application number
14/846,671
(22) Filing date
2015-09-04
(30) Priority date
2012-11-10
(43) Publication date
2018-09-11
(45) Date of grant
2018-09-11
(51) IPC
A61M 25/01; A61M 25/00
(52) CPC
  • 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 {}: 25/0138, 2025/0059, 25/0045, 25/005, 25/0144, 25/0147, 25/09
(73) Assignee
Curvo Medical Inc
(72) Inventors
Stephen J. Hebert
(54) Title
Coaxial bi-directional catheter
(57) Abstract

A deflectable catheter including an outer member having a proximal portion and a distal portion, an elongated column member extending distally from the outer member and an inner member positioned coaxial with the outer member and attached to the column member. The inner member extends distally of the outer member and has a distal tip portion. A reinforcement member is positioned over the column member to restrict axial movement of the column member such that when one of the inner member or outer member is moved with respect to the other, axial compression of the column member is restricted by the reinforcement member causing the distal tip portion of the inner member to deflect laterally.

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Claims (18)

  1. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal portion and a distal portion, the inner member positioned coaxially within the outer member, the inner member and outer member relatively movable to effect deflection of a tip of the catheter; a column member connected to the inner member; a coil positioned over the column member; a first stop at the proximal end of the coil configured to limit either one or both of axial proximal movement of the inner member and distal movement of the outer member to enable deflection of the tip in a first direction; and a second stop configured to limit either one or both of axial distal movement of the inner member and proximal movement of the outer member to enable deflection of the tip in a second direction different than the first direction, the second stop spaced axially from the first stop; wherein the inner member is rotatable relative to the outer member and the column member turns with the inner member.
  2. The deflectable catheter of claim 1, wherein rotation of the inner member allows 360 degree deflection since the tip can deflect in any plane.
  3. The deflectable catheter of claim 1, wherein the column member is not attached to the outer member.
  4. The deflectable catheter of claim 1, further comprising at least one radiopaque marker band attached to the inner member, the column member attached to the marker band.
  5. The deflectable catheter of claim 1, wherein the second stop is connected to the inner member.
  6. The deflectable catheter of claim 1, wherein the inner member comprises a tube with a series of cuts formed therein.
  7. The deflectable catheter of claim 1, wherein the inner member has a central lumen to receive a guidewire.
  8. The deflectable catheter of claim 1, wherein the outer member has a central longitudinal axis and the column member is radially offset with respect to the central longitudinal axis of the outer member.
  9. The deflectable catheter of claim 1, wherein the inner member and outer member are dimensioned to allow introduction of fluids between an outer wall of the inner member and an inner wall of the outer member.
  10. The deflectable catheter of claim 1, wherein a lumen of the outer member which receives the inner member is lubricated to facilitate movement of the inner member therein.
  11. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal portion and a distal portion, the inner member positioned coaxially within the outer member, the inner member and outer member relatively movable to effect deflection of a tip of the catheter; a first stop movable with the inner member; a second stop movable with the inner member; a third stop movable with the outer member; an elongated column member attached to the inner member externally thereof and radially offset from a longitudinal axis of the inner member; wherein upon one or both of axial proximal movement of the inner member and distal movement of the outer member engagement of the first stop enables deflection of the tip in a first direction, and upon one or both of axial distal movement of the inner member and proximal movement of the outer member the second stop engages the outer catheter to enable deflection of the tip in a second direction different than the first direction, the second stop spaced axially from the first stop.
  12. The deflectable catheter of claim 11, wherein the first stop is at a proximal portion of the coil.
  13. The deflectable catheter of claim 12, wherein the second stop is positioned proximal of the first stop.
  14. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal and a distal portion, the inner member positioned coaxial within the outer member, the inner member and outer member relatively movable to cause deflection of a tip of the catheter, wherein the inner member is rotatable with respect to the outer member; an elongated column member, the column member turning with the inner member; a first stop at a distal portion of the catheter configured to limit either one or both of axial movement of the inner member in a first axial direction and movement of the outer member in a second axial direction opposite the first axial direction, wherein after contact with the first stop further relative movement of the inner member and outer member causes deflection of the tip in a first direction.
  15. The deflectable catheter of claim 14, wherein the column member extends distally of the outer member.
  16. The deflectable catheter of claim 15, further comprising a reinforcement member positioned over the column member to restrict axial movement of the column member such that when one of the inner member or outer member is moved with respect to the other, axial compression of the column member is restricted by the reinforcement member causing a tip portion of the inner member to deflect laterally.
  17. The deflectable catheter of claim 15, further comprising a second stop configured to limit either one or both of axial movement of the inner member in the second direction and axial movement of the outer member in the first axial direction wherein after contact with the second stop further relative movement of the inner member and outer member causes deflection of the tip of the catheter in a second direction different than the first direction, the second stop spaced axially from the first stop.
  18. The deflectable catheter of claim 15, wherein the column member is connected to the inner member and not connected to the outer member.

Description

This application is a divisional of application Ser. No. 14/064,170, filed Oct. 27, 2013, now U.S. Pat. No. 9,233,225, which claims priority from provisional application Ser. No. 61/724,921, filed Nov. 10, 2012. The entire contents of each of these applications are incorporated herein by reference.

Technical Field

This application relates to medical devices, and more particularly, to medical catheters with steering capabilities for use in tracking tortuous pathways or deflecting and/or placing accessories.

Background of Related Art

The concept of a variable stiffness microcatheter for use in navigating into tortuous narrow vasculature for delivery of treatment options such as fluid injection or coil placement is disclosed in U.S. Pat. No. 4,739,786, to Engelson. This is achieved by steam shaping the variable stiffness catheter's distal tip and tracking the catheter in combination with a guidewire, straight or curved. While this method allows for quick, accurate access to remote areas such as those in the brain, it does not allow for slight distal tip adjustments to aid in treatment once the destination site is reached. If adjustments are needed, the catheter or the guidewire, or in some instances both, would have to be removed and re-shaped.

U.S. Pat. No. 6,726,700, to Levine, and U.S. Pat. No. 7,591,813, to Levine et al., attempted to correct this shortcoming by disclosing a microcatheter with a deflectable distal tip.

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Record as JSON 
{
  "publication_number": "US10071224B2",
  "country": "US",
  "kind": "B2",
  "title": "Coaxial bi-directional catheter",
  "abstract": "A deflectable catheter including an outer member having a proximal portion and a distal portion, an elongated column member extending distally from the outer member and an inner member positioned coaxial with the outer member and attached to the column member. The inner member extends distally of the outer member and has a distal tip portion. A reinforcement member is positioned over the column member to restrict axial movement of the column member such that when one of the inner member or outer member is moved with respect to the other, axial compression of the column member is restricted by the reinforcement member causing the distal tip portion of the inner member to deflect laterally.",
  "claims": [
    "1. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal portion and a distal portion, the inner member positioned coaxially within the outer member, the inner member and outer member relatively movable to effect deflection of a tip of the catheter; a column member connected to the inner member; a coil positioned over the column member; a first stop at the proximal end of the coil configured to limit either one or both of axial proximal movement of the inner member and distal movement of the outer member to enable deflection of the tip in a first direction; and a second stop configured to limit either one or both of axial distal movement of the inner member and proximal movement of the outer member to enable deflection of the tip in a second direction different than the first direction, the second stop spaced axially from the first stop; wherein the inner member is rotatable relative to the outer member and the column member turns with the inner member.",
    "2. The deflectable catheter of claim 1, wherein rotation of the inner member allows 360 degree deflection since the tip can deflect in any plane.",
    "3. The deflectable catheter of claim 1, wherein the column member is not attached to the outer member.",
    "4. The deflectable catheter of claim 1, further comprising at least one radiopaque marker band attached to the inner member, the column member attached to the marker band.",
    "5. The deflectable catheter of claim 1, wherein the second stop is connected to the inner member.",
    "6. The deflectable catheter of claim 1, wherein the inner member comprises a tube with a series of cuts formed therein.",
    "7. The deflectable catheter of claim 1, wherein the inner member has a central lumen to receive a guidewire.",
    "8. The deflectable catheter of claim 1, wherein the outer member has a central longitudinal axis and the column member is radially offset with respect to the central longitudinal axis of the outer member.",
    "9. The deflectable catheter of claim 1, wherein the inner member and outer member are dimensioned to allow introduction of fluids between an outer wall of the inner member and an inner wall of the outer member.",
    "10. The deflectable catheter of claim 1, wherein a lumen of the outer member which receives the inner member is lubricated to facilitate movement of the inner member therein.",
    "11. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal portion and a distal portion, the inner member positioned coaxially within the outer member, the inner member and outer member relatively movable to effect deflection of a tip of the catheter; a first stop movable with the inner member; a second stop movable with the inner member; a third stop movable with the outer member; an elongated column member attached to the inner member externally thereof and radially offset from a longitudinal axis of the inner member; wherein upon one or both of axial proximal movement of the inner member and distal movement of the outer member engagement of the first stop enables deflection of the tip in a first direction, and upon one or both of axial distal movement of the inner member and proximal movement of the outer member the second stop engages the outer catheter to enable deflection of the tip in a second direction different than the first direction, the second stop spaced axially from the first stop.",
    "12. The deflectable catheter of claim 11, wherein the first stop is at a proximal portion of the coil.",
    "13. The deflectable catheter of claim 12, wherein the second stop is positioned proximal of the first stop.",
    "14. A deflectable catheter comprising: an outer member having a proximal portion and a distal portion; an inner member having a proximal and a distal portion, the inner member positioned coaxial within the outer member, the inner member and outer member relatively movable to cause deflection of a tip of the catheter, wherein the inner member is rotatable with respect to the outer member; an elongated column member, the column member turning with the inner member; a first stop at a distal portion of the catheter configured to limit either one or both of axial movement of the inner member in a first axial direction and movement of the outer member in a second axial direction opposite the first axial direction, wherein after contact with the first stop further relative movement of the inner member and outer member causes deflection of the tip in a first direction.",
    "15. The deflectable catheter of claim 14, wherein the column member extends distally of the outer member.",
    "16. The deflectable catheter of claim 15, further comprising a reinforcement member positioned over the column member to restrict axial movement of the column member such that when one of the inner member or outer member is moved with respect to the other, axial compression of the column member is restricted by the reinforcement member causing a tip portion of the inner member to deflect laterally.",
    "17. The deflectable catheter of claim 15, further comprising a second stop configured to limit either one or both of axial movement of the inner member in the second direction and axial movement of the outer member in the first axial direction wherein after contact with the second stop further relative movement of the inner member and outer member causes deflection of the tip of the catheter in a second direction different than the first direction, the second stop spaced axially from the first stop.",
    "18. The deflectable catheter of claim 15, wherein the column member is connected to the inner member and not connected to the outer member."
  ],
  "description_excerpt": "This application is a divisional of application Ser. No. 14/064,170, filed Oct. 27, 2013, now U.S. Pat. No. 9,233,225, which claims priority from provisional application Ser. No. 61/724,921, filed Nov. 10, 2012. The entire contents of each of these applications are incorporated herein by reference.\n\nTechnical Field\n\nThis application relates to medical devices, and more particularly, to medical catheters with steering capabilities for use in tracking tortuous pathways or deflecting and/or placing accessories.\n\nBackground of Related Art\n\nThe concept of a variable stiffness microcatheter for use in navigating into tortuous narrow vasculature for delivery of treatment options such as fluid injection or coil placement is disclosed in U.S. Pat. No. 4,739,786, to Engelson. This is achieved by steam shaping the variable stiffness catheter's distal tip and tracking the catheter in combination with a guidewire, straight or curved. While this method allows for quick, accurate access to remote areas such as those in the brain, it does not allow for slight distal tip adjustments to aid in treatment once the destination site is reached. If adjustments are needed, the catheter or the guidewire, or in some instances both, would have to be removed and re-shaped.\n\nU.S. Pat. No. 6,726,700, to Levine, and U.S. Pat. No. 7,591,813, to Levine et al., attempted to correct this shortcoming by disclosing a microcatheter with a deflectable distal tip.",
  "cpc": [
    "A61M 25/0138",
    "A61M 2025/0059",
    "A61M 25/0045",
    "A61M 25/005",
    "A61M 25/0144",
    "A61M 25/0147",
    "A61M 25/09"
  ],
  "ipc": [
    "A61M 25/01",
    "A61M 25/00"
  ],
  "assignees": [
    "Curvo Medical Inc"
  ],
  "inventors": [
    "Stephen J. Hebert"
  ],
  "filing_date": "2015-09-04",
  "publication_date": "2018-09-11",
  "grant_date": "2018-09-11",
  "priority_date": "2012-11-10",
  "application_number": "US-201514846671-A",
  "family_id": "50682395",
  "cited_by_count": 18,
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