초록 ▼

A needleless injection site comprising a housing which defines an interior chamber and a central opening which communicates with the interior chamber. The housing further comprises an elongate, proximally extending dilator projection portion which defines a fluid passage. Disposed within the central

A needleless injection site comprising a housing which defines an interior chamber and a central opening which communicates with the interior chamber. The housing further comprises an elongate, proximally extending dilator projection portion which defines a fluid passage. Disposed within the central opening and the interior chamber is a reseal member which has an elastically openable and closable aperture disposed therein and defines an expandable and collapsible internal reservoir. The reseal member normally resides in a first position within the housing wherein the aperture is in a closed configuration and the reservoir is collapsed. The reseal member is deformable such that the application of distally directed pressure thereto will cause the reseal member to distally advance within the housing to a second position wherein the aperture assumes an open configuration and communicates with the fluid passage and the reservoir. The cessation of the application of distally directed pressure to the reseal member will cause it to resiliently return to the first position wherein the aperture reassumes the closed configuration and the reservoir is collapsed. The collapse of the reservoir is adapted to prevent the creation of a vacuum within the fluid passage when the reseal member resiliently returns to its first position.

대표청구항 ▼

[ What is claimed is:] [1.] A needleless injection site, comprising:a housing defining:an interior chamber;a central opening which communicates with the interior chamber; andan elongate, proximally extending dilator projection portion defining a fluid passage;a reseal member disposed within said cen

[ What is claimed is:] [1.] A needleless injection site, comprising:a housing defining:an interior chamber;a central opening which communicates with the interior chamber; andan elongate, proximally extending dilator projection portion defining a fluid passage;a reseal member disposed within said central opening and said interior chamber, said reseal member having an elastically openable and closable aperture disposed therein and defining an expandable and collapsible internal reservoir which is adapted to retain a volume of fluid when expanded, said reseal member including a doughnut spring and normally residing in a first position within the housing wherein the aperture is in a closed configuration and the reservoir is collapsed;said reseal member being deformable such that the application of distally directed pressure thereto will cause the reseal member to distally advance within the housing to a second position wherein the reservoir is expanded and the aperture assumes an open configuration and communicates with the fluid passage and the reservoir, and the removal of the distally directed pressure therefrom will cause the reseal member to resiliently return to the first position wherein the aperture reassumes the closed configuration and the reservoir is collapsed;said reseal member being cooperatively engaged to the housing such that the collapse of the reservoir which occurs when the reseal member resiliently returns to the first position forces any volume of fluid retained within the reservoir into the fluid passage for purposes of preventing the creation of a vacuum therewithin.