Apparatus and method for targeting a body tissue

Patent metadata

Field	Value
Publication number	US-9498584-B2
Application number	US-201314060231-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 6, 2006
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

An apparatus for targeting a desired target site on a body tissue comprising a wall of a first body cavity of a patient includes a target catheter. The framing member has a longitudinal framing member core defining a central framing member axis. At least one target point is carried by the framing member and is adapted for placement adjacent the desired target site. The framing member comprises a plurality of longitudinally extending multi-segment framing strands.

First claim

Having described the invention, we claim:

1. An apparatus for targeting a desired target site on a body tissue comprising a wall of a first body cavity of a patient, the apparatus comprising:
a target catheter having a longitudinally extending target catheter lumen surrounded by a tubular target catheter wall having an outer surface;
a framing member having a collapsed condition in which the framing member is adapted for insertion into the first body cavity and an expanded condition in which the framing member is adapted for placement within the first body cavity, the framing member, when deployed into the expanded condition, having:
a longitudinal framing member core defining a central framing member axis;
a framing member body which includes a three-dimensionally bulbous portion defining a maximum body footprint in a lateral dimension and having longitudinally spaced proximal and distal body ends which are both longitudinally spaced from the maximum body footprint, a diameter of the bulbous portion being significantly smaller at the proximal and distal body ends than at the maximum body footprint, the proximal body end being attached to the outer surface of the target catheter wall, and
a protrusion located at the distal body end, the protrusion having a diameter which is smaller than the diameter of the maximum body footprint, the protrusion extending longitudinally distally from the distal body end of the bulbous portion;
at least one target point carried by the framing member and adapted for placement adjacent the desired target site; and
at least one target pathway attached to at least one target point, at least a portion of the target pathway extending through the target catheter lumen, and the target pathway being substantially spaced apart from the framing member body;
wherein the framing member comprises a plurality of longitudinally extending multi-segment framing strands, the plurality of framing strands being radially arranged in an array lateral to the central framing member axis, each framing strand having a distal strand end longitudinally spaced from a proximal strand end by a strand body, the proximal and distal strand ends being connected to the framing member core with at least one of the proximal and distal strand ends of each framing strand being slidably connected to the central framing member core, the strand bodies of the plurality of framing strands each comprising a plurality of substantially rigid strand segments pivotally connected end-to-end with each other by interposed strand hinges; and
wherein actuation of the slidable ones of the proximal and/or distal strand ends of at least one framing strand into motion along the central framing member core causes movement of at least a radially corresponding portion of the framing member between the expanded and collapsed conditions.

2. The apparatus of claim 1 , wherein each framing strand consists of an odd number of substantially rigid strand segments.

3. The apparatus of claim 2 , wherein a selected strand segment of each framing strand is located, when the framing member is in the expanded condition, in a plane substantially parallel to, and laterally spaced from, the central framing member axis.

4. The apparatus of claim 1 , wherein the framing member is substantially rotationally symmetrical.

5. The apparatus of claim 1 , including a puncture needle adapted for insertion through the target catheter lumen and into the first body cavity, the puncture needle having a first needle end operative to puncture the body tissue at the target site.

6. The apparatus of claim 1 , including a puncture needle guided by the target pathway and adapted for insertion through the target catheter lumen and into the first body cavity, the puncture needle having a first needle end operative to puncture the body tissue responsive to guidance by the target pathway.

7. The apparatus of claim 1 , wherein the slidably connected ones of the proximal and distal strand ends of each framing strand are controlled for longitudinal motion along the central framing member core, and such longitudinal motion causes the strand segments of each strand to pivot about the strand hinges relative to one another to move at least one of the bulbous portion and the protrusion between the expanded condition and the collapsed condition.

8. The apparatus of claim 1 , including a sliding cuff substantially laterally surrounding the central framing member core and wherein the slidably connected ones of the proximal and distal strand ends of each framing strand are connected to the sliding cuff for collective, concurrent longitudinal motion of all of the slidably connected ones of the proximal and distal strand ends of each framing strand with respect to the central framing member core when the sliding cuff is moved longitudinally with respect to the central framing member core.

9. The apparatus of claim 1 , wherein longitudinal movement of the proximal and distal strand ends relatively closer together results in expansion of the framing member and longitudinal movement of the proximal and distal strand ends relatively further apart results in collapse of the framing member.

10. The apparatus of claim 1 , wherein the plurality of framing strands each include a plurality of strand segments commensurate in number, longitudinal dimension, and orientation with those of each of the other framing strands such that concurrent actuation of a plurality of framing strands results in a substantially similar profile, when viewed substantially perpendicular to the central framing member axis, in the actuated framing strands.

11. An apparatus for targeting a desired target site on a body tissue comprising a wall of a first body cavity of a patient, the first body cavity having longitudinally spaced proximal and distal cavity vestibules, the apparatus comprising:
a target catheter having a longitudinally extending target catheter lumen surrounded by a tubular target catheter wall having an outer surface;
a framing member having a collapsed condition in which the framing member is adapted for insertion into the first body cavity and an expanded condition in which the framing member is adapted for placement within the first body cavity, the framing member, when deployed into the expanded condition, having:
a framing member body having longitudinally spaced proximal and distal body ends,
a distal protrusion located at the distal body end, the distal protrusion extending longitudinally distally from the distal body end of the framing member body, and
a proximal protrusion located at the proximal body end, the proximal protrusion extending longitudinally proximally from the proximal body end of the framing member body, the proximal protrusion being attached to the target catheter, wherein
the framing member is dimensioned such that, when in the expanded condition, the proximal and distal protrusions are configured to at least partially enter the proximal and distal cavity vestibules, respectively, to resist at least one of radial, longitudinal, and lateral motion of the framing member body within the first body cavity;
at least one target point carried by the framing member body and adapted for placement adjacent the desired target site; and
at least one target pathway attached to at least one target point, at least a portion of the target pathway extending through the target catheter lumen, and the target pathway being substantially spaced apart from the framing member body.

12. The apparatus of claim 11 , wherein the framing member is substantially rotationally symmetrical.

13. The apparatus of claim 11 , including a delivery catheter having a

Assignees

• Cleveland Clinic Found
• Bavaria Medical Tech Canada Inc

Inventors

• Kapadia Samir
• Berrada Marwane
• Fuentes-Ortega Cesar
• Mok Daniel Wing Fai

Classifications

• A61B2018/00386

  Coronary vessels · CPC title

• A61B2017/3411

  with a plurality of holes, e.g. holes in matrix arrangement · CPC title

• A61B2017/00243

  cardiac · CPC title

• A61B2018/00279

  deployable · CPC title

• A61B2034/2051

  Electromagnetic tracking systems · CPC title