Blood sequestration device and method
AssigneeSmiths Medical ASD, Inc.
InventorsJay T. Breindel, Harsh D. Chheda
Life of this patent
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Abstract
A blood sequestration device configured to isolate an initial, potentially contaminated portion of blood from the flow of blood of a patient, prior to directing the flow of blood to an outlet port where the blood can be accessed. The blood sequestration device including a body member having an interior wall defining a fluid conduit having a distal portion, a first proximal portion, and a second proximal portion, wherein the first proximal portion defines a sequestration chamber configured to isolate an initial portion of blood of a flow of blood, a vent path configured to enable the escape of gas initially trapped within the sequestration chamber.
Claims19
A blood sequestration device configured to automatically retract and safely house a sharpened distal tip of a needle following isolation of an initial portion of blood and collection of a subsequent sample of blood from a flow of blood of a patient, the blood sequestration device comprising:
- a housing;
- a needle operably coupled to the housing, the needle having the sharpened distal tip, a proximal end and a wall defining a lumen therebetween;
- a needle biasing mechanism operably coupled to the proximal end of the needle and configured to bias the needle from an initial blood sequestration position, in which the sharpened distal tip of the needle protrudes from the housing, to a needle retraction position, in which the sharpened distal tip of the needle is housed within the housing;
- and
- a movable element rotatable relative to the housing between the initial blood sequestration position, a blood collection position, and the needle retraction position, wherein the movable element defines a sequestration chamber positioned for initial blood sequestration, a fluid conduit positioned for blood collection, and a chamber configured to retain the needle in the needle retraction position, wherein the initial blood sequestration position, the blood collection position, and the needle retraction position are angularly offset from each other.
A blood sequestration device configured to automatically retract and safely house a sharpened distal tip of a needle following isolation of an initial portion of blood from a flow of blood from vasculature of a patient, the blood sequestration device comprising:
- a housing;
- a needle operably coupled to the housing, the needle having the sharpened distal tip, a proximal end and a wall defining a lumen therebetween;
- a needle biasing mechanism operably coupled to the proximal end of the needle and configured to bias the needle from an initial blood sequestration position, in which the sharpened distal tip of the needle protrudes from the housing, to a needle retraction position, in which the sharpened distal tip of the needle is housed within the housing;
- a catheter operably coupled to the housing and configured to coaxially ride over the needle for positioning within the vasculature of the patient;
- and
- a movable element rotatable relative to the housing between the initial blood sequestration position and a blood collection position, wherein the movable element defines a sequestration chamber positioned for initial blood sequestration and a chamber configured to retain the needle in the needle retraction position, wherein the initial blood sequestration position and the blood collection position are angularly offset from each other.
Dependencies are inferred from the claim text.