Syringe-based fluid diversion mechanism for bodily fluid sampling
First Claim
1. A method of sequestering bodily fluid withdrawn from a patient with a bodily fluid sequestration device, the method comprising:
- establishing fluid communication between the patient and a channel of the bodily fluid sequestration device via a port, the channel defining a first fluid flow path and including a valve configured to form a substantially fluid tight seal with walls defining the channel;
the valve being operative to move from a closed configuration to an open configuration in response to a difference in pressure between a valve inlet and a valve outlet,the valve being further operative to return to the closed configuration in response to equalization of pressure between the valve inlet and the valve outlet;
receiving an initial volume of bodily fluid from the patient into the bodily fluid sequestration device via the port and the first fluid flow path, the first fluid flow path extending from a proximal end of the port when the initial volume of bodily fluid is received;
sequestering the initial volume of bodily fluid;
after the initial volume of bodily fluid is sequestered, receiving a subsequent volume of bodily fluid from the patient into a second fluid flow path of the bodily fluid sequestration device, at least a portion of the second fluid flow path formed separately from the first fluid flow path; and
providing via the second fluid flow path a volume of bodily fluid with reduced contamination due to the sequestration of the initial volume of bodily fluid.
4 Assignments
0 Petitions
Accused Products
Abstract
A syringe-based device includes a housing, a pre-sample reservoir, and an actuator. The housing defines an inner volume between a substantially open proximal end portion and a distal end portion that includes a port couplable to a lumen-defining device. The pre-sample reservoir is fluidically couplable to the port to receive and isolate a first volume of bodily fluid. The actuator is at least partially disposed in the inner volume and has a proximal end portion that includes an engagement portion and a distal end portion that includes a sealing member. The engagement portion is configured to allow a user to selectively move the actuator between a first configuration such that bodily fluid can flow from the port to the pre-sample reservoir, and a second configuration such that bodily fluid can flow from the port to a sample reservoir defined at least in part by the sealing member and the housing.
204 Citations
27 Claims
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1. A method of sequestering bodily fluid withdrawn from a patient with a bodily fluid sequestration device, the method comprising:
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establishing fluid communication between the patient and a channel of the bodily fluid sequestration device via a port, the channel defining a first fluid flow path and including a valve configured to form a substantially fluid tight seal with walls defining the channel; the valve being operative to move from a closed configuration to an open configuration in response to a difference in pressure between a valve inlet and a valve outlet, the valve being further operative to return to the closed configuration in response to equalization of pressure between the valve inlet and the valve outlet; receiving an initial volume of bodily fluid from the patient into the bodily fluid sequestration device via the port and the first fluid flow path, the first fluid flow path extending from a proximal end of the port when the initial volume of bodily fluid is received; sequestering the initial volume of bodily fluid; after the initial volume of bodily fluid is sequestered, receiving a subsequent volume of bodily fluid from the patient into a second fluid flow path of the bodily fluid sequestration device, at least a portion of the second fluid flow path formed separately from the first fluid flow path; and providing via the second fluid flow path a volume of bodily fluid with reduced contamination due to the sequestration of the initial volume of bodily fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 27)
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15. A method of sequestering bodily fluid withdrawn from a patient with a bodily fluid sequestration device, the method comprising:
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establishing fluid communication between the patient and a channel of the bodily fluid sequestration device via a port, the channel defining a first fluid flow path and including a valve configured to form a substantially fluid tight seal with walls defining the channel; receiving, without moving at least a portion of the valve relative to the port, an initial volume of bodily fluid from the patient into a pre-sample reservoir of the bodily fluid sequestration device via the port and the first fluid flow path, the first fluid flow path extending from a proximal end of the port when the initial volume of bodily fluid is received; sequestering the initial volume of bodily fluid in the pre-sample reservoir; after the initial volume of bodily fluid is sequestered, receiving a subsequent volume of bodily fluid from the patient via a second fluid flow path of the bodily fluid sequestration device, at least a portion of the second fluid flow path formed separately from the first fluid flow path; the valve being operative to move from a closed configuration to an open configuration in response to a difference in pressure between a valve inlet and a valve outlet, the valve being further operative to return to the closed configuration in response to equalization of pressure between the valve inlet and the valve outlet, which is configured to allow the creation of a negative pressure in the second fluid flow path operable to draw the subsequent volume of bodily fluid from the patient; establishing fluid communication with a sample vessel containing a culture medium; and providing via the second fluid flow path a volume of bodily fluid into the sample vessel, the volume of bodily fluid having reduced contamination due to the sequestration of the initial volume of bodily fluid. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification