Fluid diversion mechanism for bodily-fluid sampling

A device for parenterally-procuring bodily-fluid samples from a patient, the device comprising:

• a housing including a proximal end portion and a distal end portion and defining an inner volume therebetween, the housing having an inlet port and an outlet port;
• a flow control mechanism movably disposed in the housing, the flow control mechanism including a first sealing member and a second sealing member, the flow control mechanism operable to selectively control fluid flow between the inlet port and at least one of the outlet and a fluid reservoir defined at least in part by the first sealing member and the second sealing member, the flow control mechanism having a first configuration such that fluid communication is established between the inlet port and the fluid reservoir, and a second configuration such that fluid communication is established between the inlet port and the outlet port;
• and
• an actuator operably coupled to the flow control mechanism and configured to move the first sealing member a first distance to form a negative pressure in the fluid reservoir when actuated by a user.

A device for parenterally-procuring bodily-fluid samples from a patient, the device comprising:

• a housing including a proximal end portion and a distal end portion and defining an inner volume therebetween, the proximal end portion being substantially open and configured to receive a sample reservoir;
• a needle disposed in the inner volume and having a lumen configured for insertion into the sample reservoir;
• a flow control mechanism disposed in the inner volume and fluidically coupled to the needle, the flow control mechanism including an inlet port and a pre-sample reservoir defined at least in part by a first sealing member and a second sealing member, the flow control mechanism operable to selectively control fluid flow between the inlet port and at least one of the needle and the pre-sample reservoir,
• the flow control mechanism having a first configuration such that fluid communication is established between the inlet port and the pre-sample reservoir, and a second configuration such that fluid communication is established between the inlet port and the needle.

A method for procuring bodily-fluid samples from a patient using a parenteral sampling device, the device including an inlet port configured to be fluidically coupled to the patient, a pre-sample reservoir fluidically coupleable to the inlet port, an outlet port configured to be fluidically coupled to the inlet port and a sample reservoir, and a flow control mechanism operable to selectively control fluid flow between the inlet port and at least one of the outlet port and the pre-sample reservoir, the method comprising:

• establishing fluid communication between the patient and the inlet port;
• moving the flow control mechanism a first distance to form a negative pressure in the pre-sample reservoir;
• receiving a first volume of bodily-fluid into the pre-sample reservoir;
• moving the flow control mechanism a second distance to fluidically isolate the first volume of bodily-fluid in the pre-sample reservoir and establish fluid communication between the inlet port and the outlet port.