Method and apparatus for locking of central-vein catheters

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/00 (2006.01) A61M 5/19 (2006.01) A61M 25/00 (2006.01) A61M 5/34 (2006.01)

Patent

CA 2412962

A central-vein catheter (10) is locked by anticoagulant (15) and bactericidal (17) agents separated by an air bubble (16). The anticoagulant (15) is injected first, then the air bubble (16), and then the bactericidal solution (17). The air bubble (16) prevents mixing of the solutions. A multi-chamber syringe (20) facilitates sequential injection of the coagulant (15), air (16) and bactericidal agent (17) with only one connection, decreasing chances of contamination. The syringe (20) includes internal (30) and external (21) coaxial barrels separated by seals (29), the external barrel (21) having a discharge opening (26) located off center in the barrel bottom, and the internal barrel having two or three chambers, each with an outlet opening. The internal barrel (30) is rotatable relative to the external barrel to consecutively align the outlet openings with the discharge opening (26), allowing sequential injection of the contents. The syringe (20) may also be used for aspiration of the locking fluids from the catheter (10) with only one connection.

L'invention concerne un cathéter (10) de veine centrale verrouillé par un agent anticoagulant (15) et un agent bactéricide (17) séparés par une bulle d'air (16). L'anticoagulant (15) est injecté d'abord, puis la bulle d'air (16), et ensuite la solution bactéricide (17). La bulle d'air (16) empêche les solutions de se mélanger. Une seringue (20) à chambres multiples facilite l'injection séquentielle du coagulant (15), de l'air (16) et de l'agent bactéricide (17) à l'aide d'un seul raccord, ce qui réduit les risques de contamination. La seringue (20) comprend un cylindre interne (30) et un cylindre externe (21) coaxiaux séparés par des éléments (29) d'étanchéité ; le cylindre externe (21) comporte un orifice (26) de décharge excentré dans la partie inférieure du cylindre, et le cylindre interne comporte deux ou trois chambres pourvues chacune d'un orifice de sortie. Le cylindre interne (30) peut tourner par rapport au cylindre externe de manière à aligner consécutivement les orifices de sortie sur l'orifice de décharge (26), permettant une injection séquentielle des contenus. La seringue (20) peut aussi servir à aspirer, à l'aide d'un seul raccord, les fluides verrouillant le cathéter (10).

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