Method for use of vascular guidewire

• US 20060025705A1
• Filed: 03/24/2005
• Published: 02/02/2006
• Est. Priority Date: 03/24/2004
• Status: Abandoned Application

• Current Assignee: Windcrest LLC
• Original Assignee: Windcrest LLC
• Inventors: Lauritzen, Keith E., Whittaker, Allison M., Whittaker, David R.
• Application Number:
  US11/090,512
• Publication Number:
  US 20060025705A1
• Time in Patent Office: Days
• US Class Current: 600/585
• CPC Class Codes: A61M 2025/09083 having a coil around a core
• CPC Class Codes: A61M 2025/09141 made of shape memory alloys which take a particular shape at a certain temperature
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• CPC Class Codes: A61M 25/0105 Steering means as part of the catheter or advancing means; Markers for positioning systems for detection of markers A61B
• CPC Class Codes: A61M 25/0136 Handles therefor
• CPC Class Codes: A61M 25/0158 with magnetic or electrical means, e.g. by using piezo materials, electroactive polymers, magnetic materials or by heating of shape memory materials
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/09016 with mandrils
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

A method of use for a vascular guidewire and related equipment involves, in one embodiment, control of the guidewire from a location close to the entry point of the vasculature (or other entry point). It also permits convenient loading and unloading of coaxial equipment over the guidewire and it can accommodate doing so by removably and conveniently engaging a proximal end of the guidewire, taking into account the diameter of the proximal portion not being appreciably greater than any other portion of the guidewire.

Claims

1. A method for using a guidewire having a steering mechanism, the method comprising the steps of:

engaging the guidewire with a controller device for gripping the guidewire, the engagement not requiring passage of a proximal end of the guidewire through any portion of the controller;

causing energizing of the steering mechanism; and

in coordination with causing energizing of the steering mechanism, using the controller device to apply a torque to the guidewire and to cause activation of the guidewire steering mechanism.

2. The method according to claim 1, wherein the guidewire comprises a medical guidewire for use in vasculature, and the controller device contacts the guidewire at a point adjacent to an access point into the vasculature.

3. The method according to claim 2, wherein the point adjacent to the access point into the vasculature is approximately 30 cm from the access point or less.

4. The method according to claim 2, wherein the point adjacent to the access point into the vasculature is approximately 20 cm from the access point or less.

5. The method according to claim 2, wherein the point adjacent to the access point into the vasculature is approximately 10 cm from the access point or less.

6. The method according to claim 2, wherein the controller includes a longitudinal aperture for receiving the guidewire laterally.

7. The method according to claim 1, wherein the controller is removable from the guidewire without axial displacement of the guidewire.

8. The method according to claim 4, wherein the steering mechanism comprises a steerable tip and activation of the guidewire steering mechanism comprises imparting a force to the steerable tip.

9. The method according to claim 5, wherein the steerable tip is electrically activated and causing energizing of the steerable tip comprises causing a current to flow through at least a portion of the tip.

10. A method for using a guidewire having an electrically controlled steering mechanism in electrical communication with a power supply, the method comprising the steps of:

a. providing a controller device for gripping the guidewire; and

b. providing a switch in communication with the power supply to energize the steering mechanism;

wherein the controller device and the switch are adapted to be manipulated by a single human hand, further comprising the steps of

c. applying of a torque to the guidewire using the single human hand on the controller; and

d. activating the guidewire steering mechanism using the single human hand on the switch.

11. The method according to claim 10, wherein steps a and b are combined, providing a switch coupled to the controller.

12. The method according to claim 10, wherein the controller is contacted by a first portion of the human hand and the switch is contacted by a second, non-overlapping portion of the human hand.

13. The method according to claim 10, wherein the guidewire comprises a medical guidewire for use in vasculature, and the controller device contacts the guidewire at a point adjacent to an access point into the vasculature.

14. The method according to claim 11, wherein the point adjacent to the access point into the vasculature is approximately 30 cm from the access point or less.

15. The method according to claim 11, wherein the point adjacent to the access point into the vasculature is approximately 20 cm from the access point or less.

16. The method according to claim 11, wherein the point adjacent to the access point into the vasculature is approximately 10 cm from the access point or less.

17. The method according to claim 11, wherein the guidewire includes a longitudinal aperture for receiving the guidewire laterally.

18. The method according to claim 10 wherein the controller is removable from the guidewire without axial displacement of the guidewire.

19. The method according to claim 11, wherein the steering mechanism comprises a steerable tip and activation of the guidewire steering mechanism comprises imparting a deflection of the steerable tip.

20. The method according to claim 19, wherein the steerable tip is electrically activated and wherein the step of activation of the guidewire steering mechanism comprises the step of causing a current to flow through at least a portion of the steerable tip.

21. The method according to claim 10, wherein steps c and d are effected by a user using a single hand.

22. A method for use of a steerable vascular guidewire within the vasculature of a subject, the steerable vascular guidewire adapted to be used with coaxially loadable equipment that can be slid through the vasculature in the direction of a distal end of the guidewire, the method comprising the steps of:

positioning the guidewire at a first position in the vasculature using at least in part a steerable mechanism of the guidewire, the steerable mechanism being electrically activatable;

when the guidewire has reached a first position, establishing a free proximal end of the guidewire;

performing a change of the coaxially loadable equipment with respect to the guidewire;

positioning of the guidewire at a second position.

23. The method according to claim 22, wherein the step of performing a coaxially loadable equipment change comprises removing a catheter from the guidewire over the free proximal end of the guidewire.

24. The method according to claim 22, wherein the step of performing a coaxially loadable equipment change comprises removing placing a catheter over the guidewire over the free proximal end of the guidewire.

25. The method according to claim 22, wherein the proximal end of the guidewire is adapted for being received by a jack, and the proximal end of the guidewire has a maximum diameter that is not substantially greater than a maximum diameter of the guidewire, and wherein electricity for the electrical activation is supplied by an energizer to which the jack is coupled, the step of establishing a free proximal end of the guidewire further comprising removing the proximal end of the guidewire from the jack to interrupt an electrical connection between the proximal end of the guidewire and the jack.

26. The method according to claim 25, further comprising the step of causing the proximal end of the guidewire to be received by the jack in order to establish an electrical connection between the proximal end of the guidewire and the jack.

27. A method for use of a guidewire having a distal end, a body portion coupled to the distal end, and a proximal end coupled to the body portion, the distal end and at least a subset of the body portion being within a passageway formed within an object, the method comprising the steps of:

a. axially displacing the guidewire;

b. rotating the guidewire; and

c. causing a deflection of the distal end of the guidewire, steps a-c being effected by a user from a location adjacent an entry point of the guidewire.

28. The method according to claim 27, wherein the location adjacent to the entry point into the vasculature is approximately 30 cm from the access point or less.

29. The method according to claim 27, wherein the point adjacent to the entry point into the vasculature is approximately 20 cm from the access point or less.

30. The method according to claim 27, wherein the point adjacent to the entry point into the vasculature is approximately 10 cm from the access point or less.

31. The method according to claim 27, wherein the steps a-c are effected by a user with a single hand.

32. The method according to claim 29, wherein at least one of steps a and b are effected using a controller having a longitudinal aperture for non-axial coupling of the controller to the guidewire.

33. The method according to claim 27, wherein the step of causing a deflection of the distal end of the guidewire is effected by electrically energizing a steering mechanism at the distal end of the guidewire.

34. The method according to claim 33, wherein a switch coupled to the controller causes the electrical energization of the steering mechanism, in turn causing the deflection of the distal end of the guidewire.

35. The method according to claim 27, wherein the steps a-c are effected by a user with a single hand.

36. The method according to claim 32, wherein the steps a-c are effected by a user with a single hand.