Delivery system for bifurcation stents

• US 8,608,789 B2
• Filed: 05/23/2006
• Issued: 12/17/2013
• Est. Priority Date: 05/24/2005
• Status: Expired due to Fees

• Current Assignee: Trireme Medical Incorporated
• Original Assignee: Trireme Medical Incorporated
• Inventors: Konstantino, Eitan, Feld, Tanhum
• Primary Examiner(s): Hughes, S. Thomas
• Assistant Examiner(s): SZPIRA, JULIE ANN
• Application Number:
  US11/439,707
• Publication Number:
  US 20070016279A1
• Time in Patent Office: 2,765 Days
• Field of Search: 623/1.11, 623/1.15, 623/1.16, 623/1.35, 623/1.23, 623/1.42, 604/284
• US Class Current: 623/1.11
• CPC Class Codes: A61B 5/02007 Evaluating blood vessel condition, e.g. elasticity, compliance
• CPC Class Codes: A61B 5/1076 for measuring dimensions inside body cavities, e.g. using catheters A61B3/1005 takes precedence
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61B 5/6886 Monitoring or controlling distance between sensor and tissue
• CPC Class Codes: A61B 8/085 for locating body or organic structures, e.g. tumours, calculi, blood vessels, nodules
• CPC Class Codes: A61B 8/0891 for diagnosis of blood vessels
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• 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 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2250/0006 for adjusting angular orientation
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

Systems for aligning and deploying side branch stents comprise a catheter having a side branch sensor at or near a distal end thereof. Methods comprises rotating and axially transitioning the catheter until the sensor is brought into alignment with an opening to the side branch vessel.

Claims

1. A stent delivery system comprising:

a catheter shaft having a stent deployment region near a distal end thereof;

a single guidewire lumen in the stent deployment region;

a stent having a side portion on the stent deployment region of the shaft; and

a side branch sensor on the catheter shaft, wherein the sensor comprises a resilient radiopaque penetrating element which is attached to the catheter shaft, extends under the stent and through the side portion, such that when facing a wall of a main branch vessel, the element remains constrained by the wall of the main branch vessel and when the side portion of the stent is oriented toward an ostium of a side branch vessel, the element resiliently protrudes into the side branch vessel.

2. A stent delivery system as in claim 1, wherein the stent deployment region comprises a balloon which carries the stent.

3. A stent delivery system as in claim 1, wherein the single guidewire lumen extends through the balloon which carries the stent.

4. A stent delivery system as in claim 3, wherein the width of the stent on the balloon does not exceed 1.5 mm.

5. A stent delivery system as in claim 1, wherein the resilient radiopaque penetrating element is adapted to remain constrained within the main branch vessel and to be released into the side branch vessel when aligned with the side branch vessel ostium.

6. A stent delivery system as in claim 1, wherein the resilient radiopaque penetrating element is composed of a super elastic or shape memory alloy.

7. A stent delivery system as in claim 1, wherein the resilient radiopaque penetration element is composed of a resilient polymer.

8. A method for deploying a prosthesis having a side branch portion in a side branch vessel in a main branch vessel, said method comprising:

providing a catheter having a stent deployment region near a distal end thereof, the catheter carrying the prosthesis having the side branch portion on the stent deployment region, wherein the catheter comprises a single guidewire lumen in the stent deployment region;

advancing the catheter in the main branch vessel over a guidewire disposed in the single guidewire lumen, the guidewire extending through the main branch vessel until the side branch portion is proximate the side branch vessel;

rotating and/or axially positioning the catheter while observing the relative position of the side branch portion and the side branch vessel;

deploying the prosthesis after observing the alignment of the side branch portion and the side branch vessel, wherein observing comprises probing a wall of the main branch vessel with a radiopaque probe aligned with the side branch, wherein the probe is a resilient element attached to the catheter, extending under the prosthesis and through the side branch portion such that the element remains constrained within the main branch vessel when facing the wall of the main branch vessel until the element is aligned with the side branch vessel when it resiliently pops-up and enters the side branch vessel as the catheter is rotated and/or axially positioned along the guidewire in the single guidewire lumen, the guidewire extending through the main branch vessel outside of the side branch vessel.

9. A method as in claim 8, wherein the resilient element is comprised of a super elastic or shape memory alloy.

10. A method as in claim 8, wherein the resilient element is composed of a resilient polymer.