Fluid control devices and methods of using the same
A fluid control device includes an inlet configured to be placed directly or indirectly in fluid communication with a bodily fluid source and an outlet configured to be placed in fluid communication with a fluid collection device. The fluid control device has a first state in which a negative pressure differential produced from an external source such as the fluid collection device is applied to the fluid control device to draw an initial volume of bodily fluid from the bodily fluid source, through the inlet, and into a sequestration portion of the fluid control device. The fluid control device has a second state in which (1) the sequestration portion sequesters the initial volume, and (2) the negative pressure differential draws a subsequent volume of bodily fluid, being substantially free of contaminants, from the bodily fluid source, through the fluid control device, and into the fluid collection device.
1. An apparatus, comprising:
a housing having an inlet configured to be placed in fluid communication with a bodily fluid source and an outlet configured to be placed in fluid communication with a fluid collection device, the housing forming a sequestration portion configured to receive an initial volume of bodily fluid from the bodily fluid source;
an actuator coupled to the housing, the actuator having a first configuration in which a first fluid flow path places the inlet in fluid communication with the sequestration portion and a second configuration in which a second fluid flow path places the inlet in fluid communication with the outlet; and
a flow controller at least partially disposed in the sequestration portion of the housing, the flow controller configured to establish selective fluid communication between the sequestration portion and the actuator, the flow controller including a selectively permeable material and configured to transition from a first state in which the selectively permeable material allows a flow of a gas through the flow controller and prevents a flow of bodily fluid through the flow controller, to a second state in which the selectively permeable material prevents a flow of gas and bodily fluid through the flow controller,
wherein placing the outlet in fluid communication with the fluid collection device produces a negative pressure differential (1) within the first fluid flow path operable to draw the initial volume of bodily fluid into the sequestration portion when the actuator is in the first configuration, and (2) within the second fluid flow path operable to draw a sample volume of bodily fluid into the fluid collection device when the actuator is in the second configuration, and
wherein the actuator includes a diaphragm configured to transition from a first operating mode to a second operating mode when the negative pressure differential within a portion of the first fluid flow path is greater than a threshold amount of negative pressure.
2. The apparatus of claim 1 , wherein the diaphragm is coupled to at least one seal configured to define a portion of the first fluid flow path when the diaphragm is in the first operating mode and configured to define a portion of the second fluid flow path when the diaphragm is in the second operating mode.
3. The apparatus of claim 1 , wherein the flow controller is configured to be placed in the second state in response to at least a portion of the initial volume of bodily fluid saturating the selectively permeable material.
4. The apparatus of claim 1 , wherein the actuator is configured to be transitioned to the second configuration after the flow controller is transitioned to the second state.