Fluid diversion mechanism for bodily-fluid sampling

A bodily-fluid sampling device for procuring bodily-fluid samples with reduced contamination from a patient, the device comprising:

• a housing;
• a pre-sample reservoir disposed in the housing and configured to receive and isolate a volume of bodily-fluid withdrawn from the patient;
• a diverter disposed in the housing, the diverter having an inlet configured to be fluidically coupled to the patient;
• and
• a flow control mechanism coupled to the diverter and configured to transition between a first configuration in which the flow control mechanism prevents bodily-fluid from flowing from the patient to the pre-sample reservoir, a second configuration in which the flow control mechanism and the diverter collectively define a first fluid flow path between the inlet and the pre-sample reservoir that allows the pre-sample reservoir to receive the volume of bodily-fluid, and a third configuration different from each of the first configuration and the second configuration in which the flow control mechanism and the diverter collectively define at least a portion of a second fluid flow path between the inlet and an external fluid reservoir disposed outside of the housing and in fluid communication with the diverter such that bodily-fluid flows from the inlet to the external fluid reservoir via the second fluid flow path,
• the flow control mechanism transitioning from the first configuration to the second configuration producing a negative pressure differential between the inlet and the pre-sample reservoir operable to draw the volume of bodily-fluid into the pre-sample reservoir, the flow control mechanism being prevented from transitioning to the third configuration before the second configuration such that the pre-sample reservoir receives the volume of bodily-fluid before bodily-fluid flows to the external fluid reservoir.