Transmyocardial shunt and its attachment mechanism, for left ventricular revascularization

• US 6,926,690 B2
• Filed: 09/20/2001
• Issued: 08/09/2005
• Est. Priority Date: 09/10/1998
• Status: Expired due to Fees

• Current Assignee: WILK Patent Development Corporation
• Original Assignee: Percardia, Inc.
• Inventors: Renati, Richard J.
• Primary Examiner(s): Bianco, Patricia
• Application Number:
  US09/956,099
• Publication Number:
  US 20020058897A1
• Time in Patent Office: 1,419 Days
• Field of Search: 604/8, 604/9, 604/4.01, 604/6.16, 604/27, 604/28, 604/30, 604264- 66, 604/523, 604530- 32, 604/537, 60416401-16403, 60416408-16409, 604/164.1, 604/164.11, 604285- 88, 623/1.1, 623/1.11, 623/1.12, 623/1.7, 623/1.18, 623/1.2, 623 121- 125, 623 13- 136, 623 138- 139, 623 14- 148, 623/1.49, 623/11.11, 623/23.64, 623 2367- 2371, 623 2375- 2376, 623920- 21, 623915- 16, 128/898, 606/108, 606/151, 606153- 4, 606/159, 606/167, 606/170, 606184- 85, 606191- 92, 606194-200
• US Class Current: 604/8
• CPC Class Codes: A61F 2/24 Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
• CPC Class Codes: A61F 2/2493 Transmyocardial revascularisation [TMR] devices
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/94 Stents retaining their form, i.e. not being deformable, after placement in the predetermined place
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/006 Y-shaped

Abstract

A conduit is provided to provide a bypass around a blockage in the coronary artery. The conduit is adapted to be positioned in the myocardium or heart wall to provide a passage for blood to flow between a chamber of the heart such as the left ventricle and the coronary artery, distal to the blockage. The stent is self-expanding or uses a balloon to expand the stent in the heart wall. Various attachment means are provided to anchor the stent and prevent its migration. In one embodiment, a conduit is provided having a distal top which is more preferably a ball top, wire top, flare top or flip-down top. These top configurations anchor the shunt at one end in the coronary artery.

Claims

1. A conduit for providing a passageway of blood between a chamber of the heart and an adjacent blood vessel, comprising:

an elongate body having a first end and a second end and a lumen extending therethrough; and

a top that is collapsible into a first configuration and expandable into a second configuration, the top when expanded being sized and configured to hold the top within the blood vessel,

wherein the top comprises a flip-down top, and

wherein the body and the top form a substantially T-shaped configuration when the top is in the second configuration.

2. The conduit of claim 1, wherein the flip-down top comprises a plurality of tab-like sections configured to fold down relative to the elongate body.

3. The conduit of claim 2, wherein the flip-down top comprises two tab-like sections.

4. The conduit of claim 1, further comprising a coating on the conduit.

5. The conduit of claim 1, wherein the flip down top is disposed at only one end of the elongate body.

6. The conduit of claim 1, wherein the elongate body comprises a solid portion and a mesh portion.

7. The conduit of claim 6, wherein the mesh portion comprises a wire mesh.

8. The conduit of claim 6, wherein the solid portion comprises stainless steel.

9. The conduit of claim 1, wherein an end of the conduit opposite the top is configured to pierce tissue.

10. A conduit for providing a passageway of blood between a chamber of the heart and an adjacent blood vessel, comprising:

an elongate body having a first end and a second end and a lumen extending therethrough; and

a top that is collapsible into a first configuration and expandable into a second configuration, the top when expanded being sized and configured to hold the top within the blood vessel,

wherein the top further comprises a plurality of tab-like sections configured to fold down relative to the elongate body so as to form a substantially T-shaped configuration.

11. The conduit of claim 10, wherein the elongate body comprises a solid portion and a mesh portion.

12. The conduit of claim 11, wherein the mesh portion comprises a wire mesh.

13. The conduit of claim 11, wherein the solid portion comprises stainless steel.

14. The conduit of claim 10, wherein the top comprises two tab-like sections.

15. The conduit of claim 10, further comprising a coating on the conduit.

16. The conduit of claim 10, wherein the top is disposed at only one end of the elongate body.

17. The conduit of claim 10, wherein an end of the conduit opposite the top is configured to pierce tissue.