초록 ▼

A medical fluid administration system is provided for connection with an intravenous tubing system in fluid communication with a patient. In an exemplary embodiment the system includes a conduit, a housing connected to the conduit, and a piston having a slit received in the housing and displaceable

A medical fluid administration system is provided for connection with an intravenous tubing system in fluid communication with a patient. In an exemplary embodiment the system includes a conduit, a housing connected to the conduit, and a piston having a slit received in the housing and displaceable in its entirety along the longitudinal axis of a region of the housing. A contact member is positioned within the housing for engaging the piston when the piston is displaced along the longitudinal axis of the housing and forcibly pressed against the contact member. The contact member and the piston are sized and configured such that the opposing walls of the slit are deflected laterally to open the slit when the piston is forcibly pressed against the contact member, so that when the piston is pressed against the contact member, fluid can flow through the slit in direct contact with the opposing walls and through the conduit.

대표청구항 ▼

[ What is claimed is:] [1.]1. A medical fluid administration system for connection with a intravenous tubing system in fluid communication with a patient, the system comprising:a. a conduit having a flow channel for connection with said intravenous tubing system,b. a housing including at least one r

[ What is claimed is:] [1.]1. A medical fluid administration system for connection with a intravenous tubing system in fluid communication with a patient, the system comprising:a. a conduit having a flow channel for connection with said intravenous tubing system,b. a housing including at least one region having a circular cross-section, said housing being connected to said conduit, said housing having a longitudinal axis,c. a piston formed at least in part from elastomeric material, said piston being sized to be received within said housing and so as to be displaceable along the longitudinal axis of said housing along at least said one region thereof, said piston having a proximal end and a distal end, a contact point and a slit extending longitudinally at least partly therethrough, said slit having a closed position and an open position and defining opposing internal walls, said internal walls of said slit contacting each other in said closed position to seal said slit, andd. a contact member positioned within said housing for engaging said contact portion of said piston when said piston is displaced along said one region and along the longitudinal axis of said housing and forcibly pressed against said contact member, said contact member and said contact portion of said piston being sized and configured such that said opposing walls of said slit are deflected laterally to open said slit when said piston is forcibly pressed against said contact member, so that fluid can flow through said slit in direct contact with said opposing walls, and through said conduit when said piston is pressed against said contact member,said housing and said piston being sized and configured so that a tight sliding seal is defined between said housing and a sealing portion of said piston, disposed proximal from said contact portion during displacement of said piston along said housing toward and against said contact member.