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US 5,443,182 AGranted
Methods and apparatus for preparing and delivering bone cement
OwnerKazuna Tanaka, Jeffrey Kapecinventors
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OwnerKazuna Tanaka, Jeffrey Kapecinventors
Estimating the term…
Methods and apparatus are set forth for preparing and delivering bone cement from a powdered polymer component and a liquid monomer component by simultaneously injecting the powdered and liquid components, stored in separate component chambers, into an evacuated mixing chamber under the effect of the vacuum; by uniformly mixing the components in the mixing chamber (to thoroughly wet the powder); and by delivering the cement formed by the polymerization process, as needed in an operative setting, utilizing a single ready to use device. The uniform mix is achieved by simultaneously subjecting the contents of the component chambers to the effects of the mixing chamber's vacuum via separate one way nozzles, interconnecting the component chambers to the mixing chamber, which cause the powder to be broadcast and liquid to be sprayed into the mixing chamber. The nozzles are designed and oriented in a predetermined manner (depending on the type and quantity of the constituent bone cement components being mixed), to cause the components to interact at a preselected distance within the mixing chamber, to assure uniform powder saturation and a thorough mix which yields a homogeneous reaction product.
A plunger head for use as part of a system for mixing and delivering a powdered component of bone cement, stored in a first chamber attached to the proximate end of said plunger head, with a liquid component of bone cement, stored in a second chamber attached to the proximate end of said plunger head, within an evacuated mixing chamber into which the distal end of said plunger head extends, comprising:
A mixing device, used as part of a system for mixing powdered and liquid bone cement components and delivering the bone cement mix, comprising:
Apparatus for preparing and delivering a self curing bone cement formed as a polymeric reaction product when a powdered polymer component of bone cement is mixed with a liquid monomer component of bone cement, comprising:
Apparatus for saturating a predetermined quantity of a powdered component of bone cement with a predetermined volume of a liquid component of bone cement as part of a component mixing and mixed cement delivery process, comprising:
Dependencies are inferred from the claim text.