ELONGATE MEDICAL DEVICE

• US 20100312325A1
• Filed: 11/12/2008
• Published: 12/09/2010
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Dorn, Jürgen
• Granted Patent: US 9,186,482 B2
• Time in Patent Office: Days
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 39/06 Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof

Abstract

This invention relates to an elongate medical device, with a distal end to be advanced into the body of a patient and then withdrawn from the bodyf and an elongate shaft connecting the distal end with a proximal end that remains outside the body, the shaft extending in use through a hole in the skin of the body characterized by a slider, captivated on a portion of the length of the shaft, which is capable of lining the said hole, as the shaft is advanced and withdrawn relative to said hole and the slider in the hole, said slider having a maximum outer diameter that is substantially the same as or less than a maximum outer diameter of the distal end.

Claims

1. An elongate medical device, comprising:

a distal end to be advanced into the body of a patient and then withdrawn from the body,

an elongate shaft connecting the distal end with a proximal end that remains outside the body, the shaft extending in use through a hole in the skin of the body, and

a slider, captivated on a portion of the length of the shaft, which is capable of lining the hole, as the shaft is advanced and withdrawn relative to the hole and the slider in the hole, the slider having a maximum outer diameter that is substantially the same as or less than a maximum outer diameter of the distal end.

2. The device according to claim 1, in which the shaft portion has a circular cross-section.

3. The device according to claim 1, in which the shaft portion has a constant cross-sectional area.

4. The device according to claim 1, wherein the slider has an annular form.

5. The device according to claim 1, wherein the slider has a cylindrical mid-length cross-section between tapered, proximal and distal ends.

6. The device according to claim 1, wherein the slider has an axial length of more than 1 cm and less than 4 cm.

7. The device according to claim 6, wherein the slider has a length of less than 2 cm.

8. The device according to claim 1, wherein the slider has a bore for the shaft portion which carries a lubricious coating.

9. The device according to claim 1, wherein the slider has a abluminal surface which carries a coating that is effective to inhibit flow of blood proximally, between the said hole and the abluminal surface.

10. The device according to claim 1, wherein the distal end has a maximum cross-sectional area that is greater than the maximum cross-sectional area of the shaft portion.

11. The device according to claim 1, wherein the device is capable of being used without an introducer sleeve.

12. The device according to claim 1, wherein the device is capable of being used with an introducer sleeve.

13. The device according to claim 1, wherein the device is a stent delivery device.

14. The device according to claim 1, wherein the distal end includes a pull-back sheath.

15. The device according to claim 14, wherein the shaft portion cross-section includes a pull wire for pulling the pull-back sheath proximally relative to the distal end.

16. The device according to claim 1, wherein the device is an over-the-wire catheter.

17. The device according to claim 1, wherein the shaft has a proximal portion with an abluminal surface that has a diameter that is greater than a diameter of that portion of the shaft that is distal of the shaft proximal portion and proximal of a shaft distal portion.

18. The device according to claim 17, wherein the shaft proximal portion has a maximum outer diameter that is substantially the same as or less than a maximum outer diameter of the distal end.

19. The device according to claim 18, that is so constructed and arranged that said abluminal surface of the proximal portion of the shaft does not move proximally, relative to the stent, during deployment of the stent.