Intravenous injection site split septum and pressure...

A - Human Necessities – 61 – M

Patent

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Details

A61M 39/10 (2006.01)

Patent

CA 2647795

An improved injection site (12) for infusion of parenteral fluids and the like is provided, having a pressure-actuated valve (20) and a novel split septum unit (24), which effectively prevent reflux of blood into the assembly (10). The septum unit (24) includes a resilient split septum body (64) which is precompressed so that the septum body (64) is caused to protrude proximally (78) upon insertion of a cannula (16). Consequently, upon removal of the cannula (16), there is essentially no "drumming" or creation of friction-induced negative pressures sufficient to generate blood reflux. The preloaded septum body (64) also has its proximal surface (74) essentially flush and coplanar with the adjacent proximal end (66b) of the tubular septum holder (66) to enhance the cleanliness of the unit (24). The specialized well (46) and septum unit (24) afford a resilient seal between the periphery of the septum body (64) and the surface (50), and a separate hard-surface seal between the outer margin of the surface (50) and the septum holder (66).

L'invention concerne un point d'injection (12) amélioré permettant la perfusion de fluides parentéraux et similaires, ayant une valve commandée par pression (20) et une unité de septum (24) d'une conception nouvelle qui empêche efficacement le reflux de sang dans l'assemblage (10). L'unité de septum (24) comprend un corps de septum divisé élastique (64) qui est pré-compressé de telle sorte que le corps de septum (64) dépasse de façon proximale (78) lors de l'insertion d'une canule (16). Par conséquent, lorsque la canule (16) est retirée, il n'y a pratiquement pas de vibrations ou de pressions négatives créées par la friction qui soient suffisantes pour entraîner un reflux du sang. La surface proximale (74) du corps de septum précontraint (64) est en grande partie au ras de et coplanaire avec l'extrémité proximale adjacente (66b) du support de septum tubulaire (66) afin d'améliorer la propreté de l'unité (24). Le logement spécialisé (46) et l'unité de septum (24) créent un joint élastique entre la périphérie du corps de septum (64) et la surface (50), et un joint à surface rigide distinct entre le bord extérieur de la surface (50) et le support de septum (66).

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