Fluid material dispensing syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/20 (2006.01) A61C 5/06 (2006.01) A61M 5/145 (2006.01) A61M 5/24 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2409711

A dental syringe (10) has a needle (11) affixed to a carpule holder (12), which carpule holder (12) is affixed to a power drive unit (13). A harpoon (20) is provided to affix the drive unit to the carpule plunger (32). The harpoon (20) is made of stainless steel or other hard, corrosion resistant, sterilizable, material. Harpoon 20 has a unique barb geometry and hardened, knife-like, edges (21). The syringe (10) may operate to divide the delivery of anesthesia into two phases. According to the method, during the first about 10 seconds of the injection, anesthetic is delivered at an extremely slow rate to maximize patient comfort. The injection rate then automatically increases to the pre-programmed rate associated with the injection type selected.

L'invention concerne une seringue dentaire (10) comportant une aiguille (11) fixée à un support de carpule (12), ce support de carpule (12) étant lui-même fixé à une unité d'entraînement électrique (13). Un harpon (20) permet de fixer l'unité d'entraînement au piston de carpule (32). Le harpon (20) est fabriqué à partir d'acier inoxydable ou d'un autre matériau dur, stérilisable, résistant à la corrosion. Ce harpon (20) possède une géométrie d'arête unique et des bords (21) durcis, tel un couteau. La seringue (10) peut servir à diviser la libération de l'anesthésie en deux phases. Selon le procédé de l'invention, durant les dix premières secondes de l'injection environ, l'anesthésique est libéré à une vitesse extrêmement lente, afin d'améliorer le bien-être du patient. La vitesse d'injection augmente ensuite automatiquement pour atteindre la vitesse pré-programmée correspondant au type d'injection sélectionné.

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