Stent expanding device

• US 20070288080A1
• Filed: 06/07/2006
• Published: 12/13/2007
• Est. Priority Date: 06/07/2006
• Status: Abandoned Application

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Bialas, Michael R., Maccollum, Michael W., Mackiewicz, David A.
• Application Number:
  US11/449,451
• Publication Number:
  US 20070288080A1
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument

Abstract

side and a pair of pins for insertion into the sleeve. In another embodiment, the device has an expanding mandrel having a side, two open ends and a plurality of longitudinal slots along the side. An expansion pin is included, and has a cylindrical body with a tapered tip. In another embodiment, the device expands a stent into a tapered stent. The tapered stent expanding device includes a slotted expansion mandrel and a tapered pin having an expansion crown. In another aspect, the device includes a threaded mandrel for the uniform expansion of the diameter of a stent.

Claims

1. A stent expanding device for expanding the diameter of a stent comprising:

an expansion mandrel having a side and two open ends and at least one longitudinal slot along the side; and

an expansion pin having a cylindrical body and a tapered end.

2. A stent expanding device of claim 1, wherein the at least one longitudinal slot is a plurality of longitudinal slots.

3. The stent expanding device of claim 1, further comprising an expansion crown having teeth configured to engage the slots, and a bore.

4. The stent expanding device of claim 3, wherein the expansion crown is configured to be removably attached to the expansion pin and wherein the teeth are located at substantially evenly spaced intervals on the expansion crown.

5. The stent expanding device of claim 4, wherein the expansion pin further comprises:

an upper cylindrical body having a side face and a top face; and

a closed channel in the side face and an open channel in the top face.

6. The stent expanding device of claim 3, wherein the mandrel includes overlapping members configured to fit into a receiving groove in the mandrel.

7. The stent expanding device of claim 3, further including a rounding rod.

8. The stent expanding device of claim 7, wherein the expansion pin includes a bore extending a length of the expansion pin.

9. The stent expanding device of claim 8, wherein the rounding rod is sized to be received in the bore of the expansion pin.

10. A stent expanding device for expanding a diameter of a stent comprising:

an expansion mandrel having a cavity, a side, two open ends, and a plurality of longitudinal slots along the side, the slots being spaced at regular intervals and having a terminus that is continuous with one of the two open ends of the mandrel, the slots commencing at a keyhole in the side of the mandrel, each consecutive slot terminating at opposite ends of the mandrel;

an expansion pin having a cylindrical body and a tapered end;

an expansion crown having teeth and a bore, the teeth being configured to slide into the termini of the slots, the bore being configured to receive the cylindrical body of the expansion pin; and

a rounding rod configured to be received into the cavity of the mandrel.

11. A stent expanding device for expanding a stent into a tapered stent comprising:

a tapered mandrel having a closed end and an open end, and slots along a side of the tapered mandrel, the slots extending from the closed end of the mandrel and terminating at and continuous with the open end of the mandrel; and

a tapered expansion pin having a tapered cylindrical body.

12. The stent expanding device of claim 11, further comprising teeth on the tapered expansion pin, configured to be received into the termini of the slots.

13. The stent expanding device of claim 12, further comprising a contraction ring having a circular passageway, the passageway configured to receive the tapered mandrel.

14. A stent expanding device, for expanding the diameter of a stent, comprising a threaded mandrel having tapered tip.

15. The stent expanding device of claim 14, further including a rotating device for rotating the threaded mandrel.

16. A method of using a stent expanding device comprising:

inserting an expansion pin into an expansion crown to form a loaded expansion pin;

sliding a stent onto a mandrel to form a loaded mandrel;

partially inserting a loaded expansion pin into each end of the mandrel;

sliding expansion crowns down the expansion pins until fingers of the crowns are seated in slots of the mandrel; and

completely inserting the loaded expansion pin into each end of the mandrel to form an expanded stent.

17. A method of using a stent expanding device comprising:

loading one or more stents onto a mandrel having a cut along the length of a side and a cavity; and

inserting an expansion pin into the cavity of the mandrel.

18. A method of expanding a stent comprising:

rotating a threaded mandrel having a tapered tip and feeding one or more stents onto the mandrel while the mandrel rotates.

19. A method of expanding a stent comprising:

sliding a contraction ring over a mandrel with a closed end and an open end;

loading one or more stents onto the mandrel from the closed end;

sliding the contraction ring away from the stents; and

inserting a tapered pin into the open end of the mandrel.