Surgical tools for treatment of spinal stenosis
View Patent ↗Described herein are pullwire handle devices for securing to a tissue-penetrating pullwire. In some embodiments, the device includes a handle body, a pullwire lock configured to removably lock the pullwire handle device onto a pullwire within the handle body, and a tip containment element configured to retain the distal tip of the pullwire. In some embodiments, the handle body further comprises a storage chamber configured to store a distal portion of the pullwire. Also described herein are methods for capturing a pullwire using a pullwire handle device. In some embodiments, the method includes the steps of inserting the distal end of a pullwire into the pullwire handle device, advancing the pullwire further into the pullwire handle device while the distal portion of the pullwire is contained within the pullwire handle device, and locking the distal portion of the pullwire within the pullwire handle device.
1. A method of capturing a pullwire using a pullwire handle device configured to secure to a distal end of a pullwire, the method comprising:
inserting the distal end of a pullwire into the pullwire handle device;
advancing the pullwire further into the pullwire handle device while the distal end of the pullwire is contained within the pullwire handle device;
locking the pullwire within the pullwire handle device;
coupling a device to a proximal region of the pullwire; and
pulling on the pullwire handle device to advance the device through a spinal foramen.
2. The method of claim 1 , the advancing step comprising advancing the pullwire into a storage chamber of the pullwire handle device.
3. The method of claim 2 , the advancing step further comprising advancing the pullwire against a surface within the storage chamber such that the pullwire buckles and is stored within the storage chamber.
4. The method of claim 1 , the locking step comprising releasing a button coupled to a locking mechanism to lock the locking mechanism and secure the distal portion of the pullwire within the pullwire handle device.
5. The method of claim 1 , the locking step comprising moving the pullwire and pullwire handle device with respect to one another to lock the distal portion of the pullwire within the pullwire handle device.
6. The method of claim 5 , wherein moving the pullwire and pullwire handle device with respect to one another comprises moving the pullwire and pullwire handle device with respect to one another such that a portion of the pullwire moves out of the pullwire handle.
7. The method of claim 1 , further comprising the step of pulling on the pullwire handle device to manipulate the pullwire relative to a patient through which the pullwire passes.
8. The method of claim 7 , the pulling step comprising pulling on the pullwire handle device to advance a proximal portion of the pullwire in a distal direction through a spinal foramen.
9. The method of claim 7 , the pulling step comprising pulling on the pullwire handle device to transmit a force to a proximal portion of the pullwire, wherein the force is greater than 10 pounds.
10. The method of claim 7 , the pulling step comprising pulling on the pullwire handle device to transmit a force to a proximal portion of the pullwire, wherein the force is greater than 35 pounds.
11. A method of capturing a pullwire using a pullwire handle device configured to secure to the distal end of a pullwire, the method comprising:
inserting the distal end of the pullwire into the pullwire handle device;
moving a cam surface of a locking mechanism of the pullwire handle device such that the cam surface applies a force to a clamp plate and the clamp plate applies a force to the pullwire, wherein moving the cam surface comprises rotating the cam surface against the clamp plate and moves the clamp plate toward the pullwire; and
moving the clamp plate within the pullwire handle device such that the cam surface applies an increased force to the clamp plate and the clamp plate secures the pullwire.
12. The method of claim 11 , the moving the cam surface step comprising moving the clamp plate within the pullwire handle device such that the cam surface further rotates against the clamp plate and further moves the clamp plate toward the pullwire.
13. The method of claim 11 , the moving a cam surface step comprising releasing a pressed button coupled to a first end of a lever arm, wherein a second end of the lever arm is coupled to the cam surface.
14. The method of claim 13 , wherein as the button is released, the lever arm rotates, thereby rotating the cam surface against the clamp plate.
15. The method of claim 11 , the moving the clamp plate step comprising moving the pullwire and pullwire handle device with respect to one another such that the clamp plate moves within the pullwire handle device.
16. The method of claim 15 , wherein moving the pullwire and pullwire handle device with respect to one another comprises moving the pullwire and pullwire handle device with respect to one another such that a portion of the pullwire moves out of the pullwire handle and the clamp plate moves toward the proximal end of the pullwire handle device.