Syringe-based fluid diversion mechanism for bodily fluid sampling

A blood transfer system, comprising:

• a lumen-containing device fluidically coupleable to a patient;
• and
• a blood transfer device having an inlet port in fluid communication with the lumen-containing device, the blood transfer device having a channel defining at least a portion of a first fluid flow path that receives a first volume of blood,
• the blood transfer device having a valve disposed in the first fluid flow path and configured to transition between a closed configuration in which the valve contacts a valve seat to form a substantially fluid tight seal and an open configuration in which at least a portion of the first volume of blood flows in the first fluid flow path toward the valve, the channel extending from a proximal end of the inlet port when the portion of the first volume of blood flows in the first fluid flow path toward the valve,
• the valve transitions from the closed configuration to the open configuration in response to a difference in pressure between a valve inlet and a valve outlet, the valve automatically returns to the closed configuration in response to an equalization of pressure between the valve inlet and the valve outlet,
• the blood transfer device including a second fluid flow path that is separate from the channel, the second fluid flow path configured to receive a second volume of blood from the patient when the valve is in the closed configuration and to provide the second volume of blood substantially free of contaminants from the portion of the first volume of blood into a sample container containing a culture medium.

A blood transfer system, comprising:

• a lumen-containing device fluidically coupleable to a patient;
• and
• a blood transfer device having an inlet port in fluid communication with the lumen-containing device, the blood transfer device having a housing and a channel at least partially disposed in the housing, the channel defining at least a portion of a first fluid flow path that receives a first volume of blood,
• the blood transfer device having a valve disposed in the first fluid flow path and configured to transition between a closed configuration in which the valve contacts a valve seat to form a substantially fluid tight seal and an open configuration in which at least a portion of the first volume of blood is received into the blood transfer device via the first fluid flow path, the channel extending from a proximal end of the inlet port when the portion of the first volume of blood flows in the first fluid flow path toward the valve,
• the valve transitions from the closed configuration to the open configuration in response to a difference in pressure between a valve inlet and a valve outlet, the valve automatically returns to the closed configuration in response to an equalization of pressure between the valve inlet and the valve outlet,
• the housing including a second fluid flow path that receives a second volume of blood from the patient when the valve is in the closed configuration, the valve in the closed configuration enabling negative pressure within the second fluid flow path to draw a second volume of blood through a portion of the second fluid flow path that is separate from the channel.