| 摘要 |
<p>Apparatus for storing, mixing, and dispensing a two-component bone cement includes a first component supply section (10), a mixing section (12), and a drive base (14). One or more ampules (18) of the first (liquid) component (16), provided within the first component section (10), are broken or cut when a lever (36) is rotated. The second (powder) component (20) is provided within the mixing section (12). During the mixing process, a vacuum is applied within the mixing section (12), assisting in the delivery of the first component (16) through a filter (68) while preventing the passage of broken glass or plastic from the ampules (18). Mixing is done by a pair of paddles (98, 99) and a helical spring (106) rotating within the mixing section (12), being driven in one direction, or in alternating opposite directions of rotation, by the drive base. The resulting mixture (165) is dispensed by placing the mixing section (12), without the drive base (14) and the first component supply section (10), into a dispensing gun, which drives a shaft (182) moving a piston (102) within the mixing section (12) to dispense the mixture (165) through a dispensing tube (166) while collapsing the helical spring (106). A plug (204) within the piston (102) is pushed through the dispensing tube (166) to clear the mixture (165) remaining therein. In an alternative arrangement, mixing occurs under vacuum conditions in a bowl (392) having an internal surface (397) similarly scraped with a flexible wire (410).</p> |
