Vertebroplasty injection device

• US 7,008,433 B2
• Filed: 02/15/2001
• Issued: 03/07/2006
• Est. Priority Date: 02/15/2001
• Status: Active Grant

• Current Assignee: Depuy Acromed Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Acromed Incorporated (Johnson & Johnson)
• Inventors: Voellmicke, John C., Bjork, Todd, Peterson, Francis, Sommerich, Robert, Buonanno, John, Mraz, Paul J., Duffy, Mark
• Primary Examiner(s): Lewis, Ralph A.
• Application Number:
  US09/784,383
• Publication Number:
  US 20020156483A1
• Time in Patent Office: 1,846 Days
• Field of Search: 606/92, 606/93, 606/94, 222/256, 222/380
• US Class Current: 606/93
• 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: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61L 24/0089 containing inorganic fillers not covered by groups A61L24/0078 or A61L24/0084
• CPC Class Codes: A61L 24/02 containing inorganic materials
• CPC Class Codes: B01F 2101/20 Mixing of ingredients for bone cement
• CPC Class Codes: B01F 31/441 performing a rectilinear reciprocating movement
• CPC Class Codes: B01F 33/251 using balls as loose mixing element
• CPC Class Codes: B01F 33/5011 portable during use, e.g. hand-held
• CPC Class Codes: B01F 33/50112 of the syringe or cartridge type
• CPC Class Codes: B01F 35/754251 reciprocating in the mixing receptacle

Abstract

This invention relates to a mixing and delivery device suitable for delivering injectable biomaterials, and to preferred bone cement formulations.

Claims

1. A device for injecting bone cement, comprising:

a) a reservoir having an exit opening,

b) an injection chamber having;

i) first and second end portions, and

ii) a sterile inner surface forming an entry opening in the first end portion and an exit opening in the second end portion,

the exit opening of the reservoir and the entry opening of the sterile inner surface of the injection chamber being in fluid communication therebetween, and

wherein the injection chamber inner surface defines a volume of between 0.1 and 0.5 cc,

c) a second piston housed within the reservoir and having an inner face facing the exit opening of the reservoir, and

d) a locking pin comprising a tyne,

wherein the reservoir has a transverse hole for receiving the tyne, the second piston has a sidewall having a recess shaped for receiving the tyne, and the tyne is inserted through the reservoir hole and is received within the recess of the second piston.