Manual flow regulation for blood collection
AssigneeBecton, Dickinson and Company
InventorsJamieson W. Crawford, Craig Owen Russ, Bradley M. Wilkinson
Life of this patent
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Abstract
A specimen collection assembly including a flow control member for adjustably altering a flow path is disclosed. In one configuration, the flow control member defines a regulation channel in fluid communication with a lumen of a cannula, wherein the flow control member is configured to adjustably alter an effective flow distance between the lumen of the cannula and an interior of an evacuated collection container. In another configuration, the flow control member is positioned to vary an effective cross-sectional area of at least one of an inlet port and an outlet port adapted to be in fluid communication with the lumen and the evacuated collection container.
Claims9
A specimen collection assembly comprising:
- a cannula defining a lumen therein;
- a housing having a housing wall defining an internal chamber having an inlet port and an outlet port, the inlet port adapted for fluid communication with the lumen, the outlet port adapted for fluid communication with an evacuated collection container;
- and
- a flow control member cooperating with the housing, the flow control member having a flow control portion defining an open flow recess, the flow control portion being rotatable to position the open flow recess in and out of alignment with a flow orifice within the housing to vary an effective cross-sectional area of at least one of the inlet port and the outlet port.
A specimen collection assembly comprising:
- a cannula defining a lumen therein;
- a housing having a housing wall defining an internal chamber having an inlet port and an outlet port, the inlet port adapted for fluid communication with the lumen, the outlet port adapted for fluid communication with an evacuated collection container;
- and
- a flow control member cooperating with the housing, the flow control member having a flow control portion defining an open flow recess, the flow control portion being rotatable to position the open flow recess in and out of alignment with a flow orifice within the housing to vary an effective cross-sectional area of at least one of the inlet port and the outlet port, wherein the flow control member is rotatable between a maximum flow position and a minimum flow position.
A specimen collection assembly comprising:
- a cannula defining a lumen therein;
- a housing having a housing wall defining an internal chamber having an inlet port and an outlet port, the inlet port adapted for fluid communication with the lumen, the outlet port adapted for fluid communication with an evacuated collection container;
- and
- a flow control member cooperating with the housing, the flow control member having a flow control portion defining an open flow recess, the flow control portion being rotatable to position the open flow recess in and out of alignment with a flow orifice within the housing to vary an effective cross-sectional area of at least one of the inlet port and the outlet port, wherein the flow control portion includes a helical profile disposed about a central axis of the flow control member, wherein, upon rotation of the flow control member, the helical profile is configured to open or close at least one of the inlet port and the outlet port.
A method of regulating blood flow in a blood collection assembly comprising:
- establishing fluid communication between a patient vasculature and an evacuated collection container;
- and
- regulating blood flow from the patient vasculature by varying an effective cross-sectional area of at least one of an inlet port and an outlet port defined in a portion of a blood collection assembly housing provided in fluid communication with the patient vasculature, wherein regulating the blood flow is achieved by providing a rotatable flow control member cooperating with the housing, the flow control member having a flow control portion defining an open flow recess, the flow control member being rotatable to position the open flow recess in and out of alignment with a flow orifice within the housing.
Dependencies are inferred from the claim text.