Method of preparing and extruding a chemical agent using a kneader and chemical-agent extrusion assisting tool

• Main Authors: SAWAMURA TAKENORI, HATTORI MASATERU, MIZUTANI YOICHIRO, OKUYAMA MASAHIKO
• Format: Patent
• Language: English
• Published: 13.08.2002
• Edition: 7
• Subjects: APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BANDAGES, DRESSINGS OR ABSORBENT PADS; DENTISTRY; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DIAGNOSIS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROSTHESES; SPRAYING OR ATOMISING IN GENERAL; SURGERY; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS

An assisting tool for pressing a piston while fixing in place a syringe or a similar instrument which contains a highly viscous chemical agent, so as to extrude the chemical agent, as well as a method for extruding a chemical agent using the same. The chemical-agent extrusion assisting-tool includes a tool body in the form of a cylindrical body having a space formed therein for accommodating a tubular container, such as a syringe, which contains a highly viscous chemical, such as calcium-phosphate-based cement formed by kneading a calcium phosphate powder and a kneading liquid composed of a polysaccharide-containing aqueous solution, and an outlet formed at its bottom end. The cylindrical body has a cylindrical space formed therein so as to open at an upper end surface thereof. The assisting-tool further has a pusher including a handle portion for pressing a piston to be inserted into the tubular container, and a tubular body screw-threadedly engaged with the tool body and disposed on a side of the handle portion which presses the piston. The handle portion of the chemical-agent extrusion assisting-tool is rotated so as to press the tubular body into the cylindrical space and so as to press the piston into the tubular container, thereby extruding the chemical agent from the tubular container.