Fluid diversion mechanism for bodily-fluid sampling

A system, comprising:

• a blood sampling pathway including a lumen-containing device, a first end portion of the lumen-containing device configured to be coupled to a patient and a second end portion of the lumen-containing device configured to be coupled to a sample needle;
• and
• a blood transfer device integrated on and in fluid communication with the blood sampling pathway, the blood transfer device comprising:
• a housing including an inlet port coupled with the first end portion of the blood sampling pathway and an outlet port coupled with the second end portion of the blood sampling pathway;
• a reservoir in the housing and in fluid communication with the inlet port;
• a first seal member defining at least a portion of the reservoir, the first seal member configured to (i) facilitate a pressure differential in the reservoir operable to cause blood to flow from the inlet port to the first seal member while air flows from a volume inside the housing to a volume outside the housing, and (ii) form a seal with a wall of the housing operable to sequester a volume of blood in the reservoir;
• a sampling flow path defined by the housing, the sampling flow path having a first end in fluid communication with the inlet port and a second end in fluid communication with the outlet port;
• and
• a second seal member disposed in the housing, the second seal member configured, in a first position, to obstruct at least a portion of the sampling flow path, the second seal member configured, in a second position, such that a subsequent volume of blood flows from the inlet port through the sampling flow path to the outlet port and bypasses at least a portion of the volume of blood sequestered in the reservoir.

A system, comprising:

• a blood sampling pathway including a lumen-containing device, a first end portion of the lumen-containing device configured to be coupled to a patient and a second end portion of the lumen-containing device configured to be coupled to a sample needle;
• and
• a blood transfer device integrated on and in fluid communication with the blood sampling pathway, the blood transfer device comprising:
• a housing including an inlet port coupled with the first end portion of the blood sampling pathway and an outlet port coupled with the second end portion of the blood sampling pathway;
• a reservoir in the housing;
• a first seal member defining at least a portion of the reservoir, the first seal member operable in (i) a pressure differential being formed in the reservoir that facilitates a flow of blood from the inlet port to the first seal member and (ii) air being conveyed from inside the housing to a volume outside the housing, the first seal member and the reservoir collectively configured to sequester the blood in the reservoir;
• a sampling flow path defined by an inner surface of the housing;
• and
• a second seal member disposed in the housing, the second seal member configured, in a first position, to obstruct at least a portion of the sampling flow path, the second seal member configured to be moved to a second position in which the inlet port is in fluid communication with the sampling flow path to convey a subsequent flow of blood through the housing from the inlet port to the outlet port while bypassing the reservoir and the blood sequestered therein.