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Publication Number
US-9872644-B2
Publication Date
2018-01-23
Expiration Date
Abstract
A sampling port includes a hub having a body that forms a hub chamber for containing a fluid. The hub also has a proximal opening to the hub chamber for receiving a medical implement, and the hub chamber has a valve member that normally closes the opening. The valve member has a valve wall forming a valve interior. The sampling port also has a first and second fluid channel formed by the hub body and in fluid communication with the hub chamber. The first and second channels have radial portions and proximally extending portions with proximally extending longitudinal axes. The proximally extending longitudinal axes form a plane therebetween that diverges from the longitudinal axis of the first fluid channel.
Core Innovation
The invention relates to a sampling port for transferring arterial/venous fluid using a hub having a proximal opening to a hub chamber. The hub chamber contains a valve member that normally closes the proximal opening, where the valve member forms a valve interior having a volume. The sampling port includes a first fluid channel and a second fluid channel formed by the hub body, each in fluid communication with the hub chamber and each having a radial portion and a proximally extending portion defining a proximally extending flow path with a proximally extending longitudinal axis.
The invention further provides a bypass channel fluidly connecting the first radial portion and the second radial portion. The bypass channel is sized and configured so that a majority of fluid volume passing through the sampling port is directed into the volume of the valve interior via at least one of the first proximally extending portion and/or the second proximally extending portion. A bypass longitudinal axis is defined for the bypass channel, and configurations are described in which the plane between the longitudinal axes of the radial portions diverges from the radial axis.
The sampling port is configured for bidirectional flow behaviors including flush/prime and sample draw, where the bypass channel enables self-flushing by directing sufficient fluid into the valve interior. The described bypass configuration is also stated to maintain an unobstructed pressure column for continuous arterial pressure monitoring. The disclosed arrangements include different offset configurations and alignment configurations controlling relationships among the longitudinal axes and the plane between axes, including configurations that vary in how the bypass interacts with the valve interior.
Claims Coverage
The independent claims are clm-00001 and clm-00017. Across these independent claims, the inventive coverage centers on a sampling port with a hub chamber and normally-closed valve, two fluid channels each having radial and proximally extending portions with defined longitudinal axes, and a bypass channel that connects the radial portions and directs a defined portion of flow into the valve interior while a remaining portion passes through the bypass.
Hub chamber with normally closing valve interior
A hub having a body forming a hub chamber for containing a fluid, the hub further having a proximal opening to the hub chamber for receiving a medical implement, the hub chamber having a valve member normally closing the opening, the valve member having a valve wall forming a valve interior having a volume.
Two fluid channels with radial and proximally extending axes
A first fluid channel formed by the hub body, the first fluid channel being in fluid communication with the hub chamber, the first fluid channel having a first radial portion having a first radial longitudinal axis and a first proximally extending portion having a first proximally extending flow path with a first proximally extending longitudinal axis; and a second fluid channel formed by the hub body, the second fluid channel being in fluid communication with the hub chamber, the second fluid channel having a second radial portion having a second radial longitudinal axis and a second proximally extending portion having a second proximally extending flow path with a second proximally extending longitudinal axis.
Bypass channel directing majority into valve interior
A bypass channel fluidly connecting the first radial portion and the second radial portion, the bypass channel sized such that a majority of fluid volume passing through the sampling port is directed into the volume of the valve interior via at least one of the first proximally extending portion and/or the second proximally extending portion.
Bypass channel with first volume greater than second volume
A bypass channel fluidly connecting the first radial portion and the second radial portion, the bypass channel configured to cause a first volume of fluid to be directed into at least one of the first proximally extending portion and/or the second proximally extending portion, and a second volume of fluid to pass through the bypass channel, the first volume being greater than the second volume.
Together, the independent claims require a sampling port architecture with a normally closing valve over a hub chamber, two hub fluid channels each defined by radial and proximally extending longitudinal axes, and a bypass channel connecting the radial portions that directs a defined portion of flow into proximally extending portions and the valve interior, with the first volume greater than the second volume and, in clm-00001, a majority directed into the valve interior.
Stated Advantages
Enhanced flushing without practitioner manipulation.
Reduced negative interference with pressure monitoring.
Documented Applications
Continuous arterial pressure monitoring, including flush/prime and sample draw behaviors.
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