Apparatus and method for stylet-guided vertebral augmentation

• US 8,894,658 B2
• Filed: 05/30/2012
• Issued: 11/25/2014
• Est. Priority Date: 11/10/2009
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: CareFusion 2200 Inc (Becton, Dickinson & Co)
• Inventors: Linderman, Evan D., Krueger, John A.
• Primary Examiner(s): Ramana, Anu
• Application Number:
  US13/483,919
• Publication Number:
  US 20120239047A1
• Time in Patent Office: 909 Days
• Field of Search: 606/86.R, 606 92- 94, 606/279
• US Class Current: 606/86.R
• CPC Class Codes: A61B 17/1642 for producing a curved bore
• CPC Class Codes: A61B 17/8805 for introducing fluid filler into bone or extracting it A61B17/7097, A61B17/8833 take precedence
• CPC Class Codes: A61B 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• CPC Class Codes: A61B 17/8819 characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula A61B17/8825 takes precedence
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/08 Accessories or related features not otherwise provided for
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

A stylet-guided balloon vertebroplasty system, as well as methods for bone augmentation using same are provided. In certain embodiments, a pre-curved stylet with an overlying delivery tube may be used to target an approximately centered target site within a bone structure, facilitating direction thereto of an expandable member useful for creating a cavity that may receive curable material to restore bone height and/or to reinforce the bone structure.

Claims

1. A system configured for stabilizing a bone structure of a patient, the system comprising:

an access cannula configured for penetrating into a bone structure;

a guide stylet assembly that comprises

a stylet including memory metal and incorporating a distal pre-set curve; and

an overlying delivery tube through which the stylet snugly and slidably extends, where the stylet and the delivery tube have sufficient length to extend through and be operable beyond the distal end of the access cannula, and where the pre-set curve is held generally longitudinally straight when the stylet is constrained by the access cannula;

an expandable member configured for passage through and deployment outside a distal end of the overlying delivery tube; and

proximal end indicia showing the direction of curvature of the stylet'"'"'s pre-set curve and indicating when a distal end terminus of the stylet is aligned with and ready to exit the distal end of the delivery tube.

2. The system of claim 1, where the expandable member is embodied as a fluid-inflatable balloon configured to create a cavity by displacing cancellous bone.

3. The system of claim 1, wherein the stylet comprises_a curved delivery cannula configured for passage through the access cannula.