High pressure applicator

• US 6,383,190 B1
• Filed: 09/30/1999
• Issued: 05/07/2002
• Est. Priority Date: 04/01/1998
• Status: Expired due to Term

• Current Assignee: NeuroTherm, Inc. (Abbott Laboratories Incorporated)
• Original Assignee: Parallax Medical, Inc. (Abbott Laboratories Incorporated)
• Inventors: Preissman, Howard E.
• Primary Examiner(s): Mancene, Gene
• Assistant Examiner(s): Priddy, Michael B.
• Application Number:
  US09/409,934
• Time in Patent Office: 950 Days
• Field of Search: 606/63, 606/92-94
• US Class Current: 606/94
• CPC Class Codes: A61B 17/8816 characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections
• 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 17/8833 Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2002/4677 using a guide wire

Abstract

A pressure applicator for applying pressure to a flowable implant material, e.g., PMMA. A pressure applicator or driver includes a pair of columns which are engageable with one another, preferably by threads to generate a driving pressure. A handle is provided for the operator to grasp and steady the device as he turns the handle to apply pressure to the implantable material within the applicator. A luer-lock or other connecting device is provided for attaching the applicator to a cannula (or a connecting conduit that in turns connects with a cannula) that will deliver the implant material to the desired site. Pressures of about 1000-3000 psi may be generated by this device.

Claims

1. A method of preparing a high pressure applicator for driving the delivery of a flowable tissue implant material for use, said method comprising:

providing an applicator having a first column having an inner wall, an outer wall, a first open end and a second substantially closed end having an orifice therethrough, and a second column drivably engageable with the first column to generate a pressure within the first column;

loading the first column with flowable tissue implant material;

engaging the second column with the first column to enclose the tissue implant material; and

advancing the second column toward the first column to generate a pressure for driving the flowable tissue material through the orifice.

2. The method of claim 1, wherein the second column includes a plunger adapted to form a pressure seal with the inner wall of the first column and said engaging the second column with the first column comprises introducing the plunger into the tissue implant material.

3. The method of claim 1, wherein said advancing the second column toward the first column to generate a pressure for driving the flowable tissue material through the orifice comprises generating a high pressure of at least 1000 psi, said applicator containing at least 5 cc of tissue implant material therein.

4. The method of claim 1, further comprising connecting a substantially noncompliant tube to the orifice prior to said advancing the second column toward the first column to generate a pressure for driving the flowable tissue material through the orifice.

5. The method of claim 1, further comprising connecting a substantially non-compliant tube after said advancing the second column toward the first column to generate a pressure for driving the flowable tissue material through the orifice, thereby purging the orifice prior to connecting the substantially noncompliant tube.

6. The method of claim 1, wherein said loading comprises slightly overfilling the first column with the implant material to form a meniscus created by surface tension of the implant material.

7. The method of claim 4, further comprising prefilling the substantially noncompliant tube prior to said connecting to the orifice.

8. The method of claim 7, wherein said prefilling comprises prefilling with saline.

9. The method of claim 8, wherein said prefilling comprises prefilling with the tissue implant material.

10. The method of claim 5, further comprising prefilling the substantially noncompliant tube prior to said connecting to the orifice.

11. The method of claim 10, wherein said prefilling comprises prefilling with saline.

12. The method of claim 10, wherein said prefilling comprises prefilling with the tissue implant material.

13. The method of claim 6, wherein said engaging further comprises introducing a plunger element into the implant material and then driving the plunger via said advancing the second column.

14. A method of preparing a high pressure applicator for driving the delivery of a flowable tissue implant material for use, said method comprising:

providing an applicator containing at least 5 cc of tissue implant material therein; and

actuating the applicator to generate an internal pressure of at least 1000 psi and to provide a substantially even driving force to force a flow of the implant material from the applicator.

15. The method of claim 14, wherein said actuating generates an internal pressure of at least 1500 psi.

16. The method of claim 15, wherein said actuating generates an internal pressure of at least 2000 psi.

17. The method of claim 16, wherein said actuating generates an internal pressure of at least 2500 psi.

18. The method of claim 17, wherein said actuating generates an internal pressure of up to about 3000 psi.

19. The method of claim 14 wherein said actuating comprises torquing a first portion of said applicator with respect to a second portion of said applicator to generate said driving force.

20. The method of claim 19, wherein said providing an applicator comprises providing an applicator containing at least 7.5 cc of tissue implant material therein.

21. The method of claim 20, wherein said providing an applicator comprises providing an applicator containing up to about 9 cc of tissue implant material therein.

22. The method of claim 21, wherein said providing an applicator comprises providing an applicator containing up to about 15 cc of tissue implant material therein.