Pre-slit injection site and tapered cannula

An in-line injection site usable with a blunt cannula comprising:

• a housing having a first end defining an inlet to a fluid flow path, at least one channel that defines a second fluid flow path that is not parallel to the fluid flow path, said first end bounded in part by an annular lip, wherein an interior surface of the housing has a narrowing taper that terminates in an annular channel formed by a ridge projecting inwardly from the interior surface;
• cylindrical resilient sealing means positioned on a selected surface of said lip, said sealing means defining a resealable cannula receiving opening therethrough, said sealing means having an exterior peripheral surface around said resealable opening and being positioned against said interior surface such that a void is created by said annular channel;
• and
• means for retaining said sealing means adjacent said lip including force-applying means for urging said resealable opening to a sealed condition, said force-applying means including an annular retaining collar, carried by said first end, for engaging said exterior peripheral surface of said sealing means to apply axially directed forces to said sealing means so as to axially compress said sealing means around said exterior peripheral surface, wherein said resealable opening opens outwardly such that a blunt cannula can be sealingly inserted through said opening and placed in fluid flow communication with said fluid flow path and such that the blunt cannula can be removed therefrom with said flexible means interacting with said housing interior surface so as to reseal said resealable opening, and wherein said sealing means contacts said ridge during insertion of the blunt cannula through said resealable opening and deforms into said annular channel.

An in-line site usable with a blunt cannula comprising:

• a housing defining an in-line site and comprising a first end and a first fluid flow path and a second fluid flow path, said first end bounded in part by an annular lip, wherein an interior surface of the housing has a narrowing taper that terminates in an annular channel formed by a ridge projecting inwardly from the interior surface;
• cylindrical resilient sealing means positioned on a selected surface of said lip, said sealing means including a cylindrical shaped flexible member having first and second spaced apart surfaces and defining a resealable cannula receiving opening therethrough, and said sealing means having an exterior peripheral surface around said first surface and being positioned against said interior surface such that a void is created by said annular channel, said resealable opening at said first surface;
• and
• means for retaining said sealing means adjacent said lip including force-applying means for urging said resealable opening to a sealed condition, said force-applying means including an annular retaining collar formed as a generally U-shaped member carried by said first end, for engaging said exterior peripheral surface of said sealing means to apply axially directed forces to and deforming said sealing, wherein said resealable opening opens outwardly such that a blunt cannula can be sealingly inserted through said opening and placed in fluid flow communication with said flow path and such that the blunt cannula can be removed therefrom with said flexible means interacting with said housing interior surface so as to reseat said resealable opening, and wherein said sealing means contacts said ridge during insertion of the blunt cannula through said resealable opening and deforms into said annular channel.