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US 11,684,765 B2Granted
Bidirectional medical valves
AssigneePiper Access, LLC
InventorsJay Allen Muse, Kevin Jerry Cook
Life of this patent
Estimating the term…
Abstract
A medical valve can include a housing that includes a sidewall and defines a chamber. The medical valve can include a septum coupled to the housing. The septum can include a proximal surface and a selectively openable closure positioned within the chamber. The medical valve can further include a plurality of projections that extend away from the sidewall and are configured to contact the proximal surface of the septum to oppose movement of a restricted portion of the septum in a proximal direction such that an aspiration cracking pressure required to open the closure to permit fluid flow through the septum in the proximal direction exceeds an infusion cracking pressure required to open the closure to permit fluid flow through the septum in the distal direction.
Claims24
A medical valve comprising:
- a housing comprising a sidewall and defining a chamber;
- a connection interface in fluid communication with the chamber, the connection interface being configured to couple with one or more medical devices for infusion of fluid through the medical valve in a distal direction and aspiration of fluid through the medical valve in a proximal direction;
- a septum coupled to the housing, the septum comprising a proximal surface, a distal surface, and a selectively openable closure that extends through a full thickness of the septum between the proximal surface and the distal surface, wherein the closure is positioned within the chamber;
- and
- a plurality of projections that extend away from the sidewall, each projection comprising a restriction surface at a distal end thereof that is configured to contact the proximal surface of the septum to oppose movement of a restricted portion of the septum in the proximal direction such that an aspiration cracking pressure required to open the closure to permit fluid flow through the septum in the proximal direction exceeds an infusion cracking pressure required to open the closure to permit fluid flow through the septum in the distal direction,
- wherein the proximal surface of the septum further comprises contact regions at which the septum is configured to contact the restriction surfaces of the plurality of projections,
- wherein the restricted portion of the septum defines an area that comprises the contact regions, and
- wherein a collective total area of the contact regions of the septum is smaller than the area of the restricted portion of the septum.
5 more elements
A medical valve comprising:
- a housing comprising a sidewall that defines at least a portion of a chamber;
- a septum fixedly secured to the housing and comprising a selectively openable closure;
- and
- a plurality of restriction surfaces positioned inward of the sidewall within the chamber and adjacent to a proximal face of the septum, the restriction surfaces being configured to press against the proximal face of the septum to delimit movement of a portion of the septum when the septum is urged in a first direction toward the restriction surfaces and further being configured to permit free movement of the septum away from the restriction surfaces when the septum is urged in a second direction away from the restriction surfaces, such that the closure is more difficult to open when the septum is urged in the first direction as compared to when the septum is urged in the second direction,
- wherein each of the restriction surfaces narrows in a distal direction to a distal end such that only a small portion thereof contacts the proximal face of the septum.
2 more elements
A medical valve comprising:
- a housing comprising a sidewall that defines at least a portion of a chamber;
- a septum coupled to the housing and comprising a selectively openable closure that is positioned within the chamber;
- and
- support structures extending inwardly from the sidewall, the of support structures comprising restriction surfaces positioned adjacent to the septum, the restriction surfaces being configured to press against the septum to delimit movement of a portion of the septum when the septum is urged in a first direction toward the restriction surfaces and further being configured to permit movement of the septum away from the restriction surfaces when the septum is urged in a second direction away from the restriction surfaces,
- wherein the septum is configured to move away from the restriction surfaces by an amount sufficient to permit fluid to pass between the septum and the restriction surfaces to thereby flush the restriction surfaces, and
- wherein the closure exhibits a first cracking pressure when the septum is urged in the first direction and exhibits a second cracking pressure that is lower than the first cracking pressure when the septum is urged in the second direction,
- wherein the support structures are arranged in a first group comprising a first plurality of support structures positioned at a first side of the closure and a second group comprising a second plurality of support structures positioned at a second side of the closure opposite the first side, the first and second groups being distinct from each other.
4 more elements
Dependencies are inferred from the claim text.