High pressure delivery system
First Claim
1. A method for performing a vertebroplasty procedure on a patient comprising:
- percutaneously inserting a distal end of a rigid cannula into a fractured vertebral body of said patient;
loading a high pressure applicator with a hardenable bone cement, said applicator comprising a barrel comprising a vessel section and an introduction section, said introduction section having a larger cross sectional area than said vessel section, and further comprising a piston member that is slidable within said vessel to create a driving force and to eject said bone cement from said vessel through an output port;
connecting a substantially non-complaint tube to said cannula and said applicator; and
actuating said applicator to generate a high pressure force against said bone cement to flow said bone cement through said tube, and through said cannula, and to said vertebral body wherein when said actuating force is removed, said flow is halted such that no oozing or additional unintended flow of bone cement to said target site is effected.
5 Assignments
0 Petitions
Accused Products
Abstract
This relates to an improved delivery system for accurately loading and controlling the delivery of flowable material to a patient. Particularly, the system may be used in the injection of hard tissue implant materials such as PMMA under pressures up to about 4000 psi. The system includes an applicator with a first column having an implant material introduction section adapted to provide for effective loading of the implant material and a second column housing a piston. The introduction section has a larger size than that of a vessel section or bore in which the requisite pressure seal between the piston and bore wall is formed. The first column may include an introduction section flared open to an included larger funnel-like opening or a separate funnel may be used that interfaces with the introduction section to facilitate the introduction of implant material. Handles on the first and second columns to be turned relative to each other to advance the columns toward each other may be provided for manual actuation of the applicator to drive implant material through a cannula and deliver implant material to a desired site.
268 Citations
13 Claims
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1. A method for performing a vertebroplasty procedure on a patient comprising:
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percutaneously inserting a distal end of a rigid cannula into a fractured vertebral body of said patient; loading a high pressure applicator with a hardenable bone cement, said applicator comprising a barrel comprising a vessel section and an introduction section, said introduction section having a larger cross sectional area than said vessel section, and further comprising a piston member that is slidable within said vessel to create a driving force and to eject said bone cement from said vessel through an output port; connecting a substantially non-complaint tube to said cannula and said applicator; and actuating said applicator to generate a high pressure force against said bone cement to flow said bone cement through said tube, and through said cannula, and to said vertebral body wherein when said actuating force is removed, said flow is halted such that no oozing or additional unintended flow of bone cement to said target site is effected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification