Fluid diversion mechanism for bodily-fluid sampling

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, an actuator, and a flow control mechanism operable to selectively control a fluid flow between the inlet port and at least one of a pre-sample reservoir and a sample reservoir, the method comprising:

• establishing fluid communication between the patient and the inlet port;
• moving the actuator from a first position to a second position, including moving a first sealing member away from a second sealing member a first distance, to create a suction force in the pre-sample reservoir operable to draw a first volume of bodily-fluid from the patient through the inlet port to the pre-sample reservoir, the pre-reservoir at least partially defined by the first sealing member and the second sealing member;
• moving the actuator from the second position to a third position to divert the flow of bodily-fluid from the patient through the inlet port to a sample reservoir and to fluidically isolate the first volume of bodily-fluid in the pre-sample reservoir.

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, including moving a first sealing member away from a second sealing member, to create a negative pressure in the pre-sample reservoir and to withdraw a predetermined volume of bodily-fluid into the pre-sample reservoir, the fluid reservoir at least partially defined by the first sealing member and the second sealing member;
• 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.