US 7,658,537 B2Granted

Bone cement mixing and delivery system with automated bone cement transfer between mixer and delivery device

AssigneeStryker Corporation

InventorsJared P. Coffeen, Christopher A. Rossman, Carlos Negroni, Jeffery D. Arnett, Josh Butters

Life of this patent

Estimating the term…

Loading patent…

Abstract

A bone cement mixing and delivery system is provided in which separate components of bone cement are mixed together in a mixer to form a bone cement mixture. The mixer includes a mixing paddle and a mixing shaft connected to the mixing paddle. A motor operatively engages the mixing shaft to rotate the mixing shaft and the mixing paddle to mix the components in a mixing chamber. The motor also operatively engages a transfer mechanism. After a predetermined mixing period has elapsed, the motor automatically actuates the transfer mechanism to transfer the mixture to a delivery device. The mixture is then delivered to a target site, such as a vertebral body of a patient or other anatomical site.

Claims20

Dependent claims

A bone cement mixing and delivery system, said system comprising:

a mixer including:
a housing defining a mixing chamber for receiving bone cement-forming components, the housing having a discharge port that opens out of the mixing chamber;
a paddle rotatably disposed in the mixing chamber for mixing the components to form bone cement;
a mixing shaft connected to said paddle for rotating said paddle;
a piston having a face directed towards the housing mixing chamber, said piston being moveably mounted to said housing to move through the mixing chamber so as to push the cement out through the housing discharge port;
a single motor;
and
a drive assembly connected to said motor and to both said mixing shaft and said piston, said drive assembly configured to, upon actuation of said motor:
rotate said paddle to cause mixing of the bone cement-forming components to form bone cement;
and move said piston through the housing mixing chamber so as to cause the discharge of the bone cement through the housing discharge port;
and
a delivery device removably connected to said housing, said delivery device having:
a reservoir, said reservoir in fluid communication with the mixer housing discharge port for receiving the cement discharged through the housing discharge port:
and
a delivery port through which cement is discharged from the reservoir of said delivery device.

12 more elements

A bone cement mixing and delivery system, said system comprising:

a mixer including:
a housing defining a mixing chamber for receiving bone cement-forming components, the housing having a discharge port that opens out of the mixing chamber;
a paddle rotatably disposed in the mixing chamber for mixing the components to form bone cement;
a piston having a face directed towards the housing mixing chamber, said piston being moveably mounted to said housing to transit through the mixing chamber so as to push the bone cement out through the housing discharge port;
a single motor;
and
a drive assembly connected to said motor for actuation by said motor and to both said paddle and said piston, said drive assembly configured to, upon actuation of said motor:
rotate said paddle so as to cause mixing of the bone cement-forming components and the forming of bone cement without moving said piston;
and, after said paddle has been rotated for a select amount of time, move said piston through the housing mixing chamber to cause the discharge of cement through the housing discharge port;
and:
a delivery device removably connected to said housing, said delivery device having:
a reservoir, said reservoir in fluid communication with the housing discharge port for receiving the cement discharged through the housing discharge port:
and
a delivery port through which cement is discharged from the reservoir said delivery device.

11 more elements

A bone cement mixing and delivery system, said system comprising:

a mixer including:
a housing defining a mixing chamber for receiving bone cement-forming components, the housing having a surface that at least partially defines the mixing chamber and a discharge port out of the mixing chamber;
a piston having a face directed towards the housing mixing chamber, said piston being moveably mounted to said housing to transit through the mixing chamber towards the mixing chamber-defining surface of said mixer housing so as to push cement out through the housing discharge port;
a paddle rotatably disposed in the mixing chamber for mixing the components to form the cement, said paddle being located between said piston and the mixing chamber-defining surface of said housing towards which said piston moves, said paddle being configured so that, as said piston moves toward the housing mixing chamber-defining surface, said paddle strikes that housing surface and compresses;
a single motor;
and
a drive assembly connected to said motor to be actuated by said motor and to both said paddle and said piston, said drive assembly configured to, upon actuation of said motor:
rotate said paddle so as to cause mixing of the bone cement-forming components and the forming of bone cement;
and move said piston through the housing mixing chamber towards the housing surface so as to cause the discharge of cement through the housing discharge port and the compression of said paddle;
and:
a delivery device removably connected to said housing, said delivery device having:
a reservoir, said reservoir in fluid communication with the housing discharge port for receiving the cement discharged through the housing discharge port:
and
a delivery port through which cement is discharged from the reservoir of said delivery device.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/416,171Filed 1 Apr 2009 · continuation
Priority: 6 Oct 2006
Published: US 2009/0257306 A115 Oct 2009
Granted: 9 Feb 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification27 codes

A61B 17/8822
For introducing fluid filler into bone or extracting it: characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw…
A61B 17/8816
For introducing fluid filler into bone or extracting it: characterised by the conduit, e.g. tube, along which fluid flows into the body or by…
A61B 17/8833
Equipment for handling bone cement or other fluid fillers: osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means…
B01F 27/054
Characterised by their elements, materials or mechanical properties: deformable stirrers, e.g. deformed by a centrifugal force applied during…

Family

Application60/828,509Us provisional application · filed 6 Oct 2006
Application60/969,173Us provisional application · filed 31 Aug 2007
PCT/US2007/021408Parent of this continuation · filed 5 Oct 2007
US 2009/0257306 A1Pre-grant publication · published 15 Oct 2009
US 7,658,537 B2This patent

From the US filing history. Foreign family members aren’t listed.