Advancer system for coaxial medical devices

• US 20070149946A1
• Filed: 12/05/2006
• Published: 06/28/2007
• Est. Priority Date: 12/07/2005
• Status: Abandoned Application

• Current Assignee: Stereotaxis, Inc.
• Original Assignee: Stereotaxis, Inc.
• Inventors: Viswanathan, Raju R., Flickinger, William
• Application Number:
  US11/634,338
• Publication Number:
  US 20070149946A1
• Time in Patent Office: Days
• US Class Current: 604/500
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0113 Mechanical advancing means, e.g. catheter dispensers

Abstract

A telescoping medical device system is provided that includes an outer sheath having a proximal end and a distal end, and a lumen extending through at least the distal end portion, and a slot extending along a portion of the outer sheath. The telescoping medical device also includes an inner member extending through the slot and through the lumen in the outer sheath. A first drive mechanically engages and drives the outer sheath, and a second drive mechanically engages and drives the inner member through the slot and into the lumen of the outer sheath.

Claims

1. A method of moving an elongate, telescoping medical device comprising at least an outer sheath and an inner member in a subject'"'"'s body, the method comprising engaging and selectively advancing and retracting the outer sheath to selectively move the distal end of the outer sheath in the subject'"'"'s body, and engaging and selectively advancing and retracting the inner member extending through an opening in the outer sheath intermediate the proximal and distal ends of the outer sheath and through a lumen in the outer sheath to selectively move the distal end of the inner member in the subject'"'"'s body.

2. The method according to claim 1 wherein the opening in the outer member moves relative to the inner member as the outer member advances and retracts.

3. The method according to claim 2 further comprising forming an opening for the inner member by wedging open a generally longitudinally extending slot in the outer sheath.

4. The method according to claim 3 wherein the outer sheath is engaged and selectively advanced and retracted at a point proximal to the opening in the sheath.

5. The method according to claim 3 further comprising closing the longitudinal slit distal to the opening.

6. The method according to claim 5 wherein the step of closing the longitudinal slot comprises adhering the margins of the slot together with adhesive.

7. The method according to claim 5 wherein the step of closing the longitudinal slot comprises ultrasonically welding the edge margins of the slot.

8. The method according to claim 5 wherein the step of closing the longitudinal slot comprises ultraviolet activation of adhesive on the edge margins of the slot.

9. The method according to claim 5 wherein the step of closing the longitudinal slot comprises mechanically engaging mating elements on the opposed edge margins of the slot.

10. The method according to claim 5 wherein the step of closing the longitudinal slot comprises sliding an engagement member to engage mating elements on the opposed edge margins of the slot.

11. The method according to claim 5 wherein the slot is surrounded by sloping sidewalls forming a generally V-shaped cross-section.

12. The method according to claim 5 wherein the slot has a spiral configuration.

13. The method according to claim 5 wherein the slot has a wavy configuration.

14. The method according to claim 5 wherein the slot extends at and angle with respect to the radial direction, forming a lapped configuration.

15. A telescoping medical device system comprising a outer sheath, having a proximal end and a distal end, a lumen extending through at least the distal end portion, and a slot extending along the distal end portion of the outer sheath, and an inner member extending through the slot and through the lumen in the outer sheath;

a first drive mechanically engaging and driving the outer sheath;

a second drive mechanically engaging and driving the inner member through the slot and into the lumen of the outer sheath;

so that the outer sheath and the inner member can be advanced separately or together.

16. The system of claim 15, where at least one of the inner or outer medical device members that is driven passes across a roller in a generally helically wound fashion.

17. The system according to claim 15 further comprising a wedge extending though the slot and forming an opening in the slot to permit the passage of the inner member.

18. The system according to claim 15 further comprising an applicator for applying adhesive to the margins of the slot distal to the opening to hold the margins together.

19. The system according to claim 15 further comprising ultrasonic welding for welding the margins of the slot distal to the opening to hold the margins together.

20. The system according to claim 15 further comprising an ultraviolet light source for curing an adhesive on the margins of the slot distal to the opening to hold the margins together.

21. The system according to claim 15 further comprising means for forming an opening for the inner member by wedging open a generally longitudinally extending slot in the outer sheath.

22. The system according to claim 15 wherein the outer sheath is engaged and selectively advanced and retracted at a point proximal to the opening in the sheath.

23. The system according to claim 15 further comprising means for closing the longitudinal slit distal to the opening.

24. The system according to claim 15 wherein the means for closing the longitudinal slit comprises means for adhering the margins of the slot together with adhesive.

25. The system according to claim 15 wherein the means for closing the longitudinal slit comprises means for ultrasonically welding the edge margins of the slot.

26. The system according to claim 15 wherein the means for closing the longitudinal slit comprises means for ultraviolet activation of adhesive on the edge margins of the slot.

27. The system according to claim 15 wherein the means for closing the longitudinal slit comprises means for mechanically engaging mating elements on the opposed edge margins of the slot.

28. The system according to claim 15 wherein the means of closing the longitudinal slot comprises sliding an engagement member to engage mating elements on the opposed edge margins of the slot.

29. The system according to claim 15 wherein the slot is surrounded by sloping sidewalls forming a generally V-shaped cross-section.

30. The system according to claim 15 wherein the slot has a spiral configuration.

31. The system according to claim 15 wherein the slot has a wavy configuration.

32. The system according to claim 15 wherein the slot extends at and angle with respect to the radial direction, forming a lapped configuration.