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Fluid diversion mechanism for bodily-fluid sampling

  • US 10,292,633 B2
  • Filed: 03/19/2015
  • Issued: 05/21/2019
  • Est. Priority Date: 05/30/2012
  • Status: Active Grant
First Claim
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1. A method for procuring bodily-fluid samples from a patient using a parenteral sampling device, the device including an inlet port configured to be placed in fluid communication with a patient, an actuator including a seal member defining a portion of a fluid reservoir, and a flow control mechanism configured to selectively place the fluid reservoir in fluid communication with the patient, the method comprising:

  • establishing fluid communication between the patient and the inlet port;

    disposing the flow control mechanism in a first configuration, the flow control mechanism defining a first fluid flow path configured to place the inlet port in fluid communication with the fluid reservoir;

    exerting an activation force on a portion of the actuator to move the seal member from a first position, in which the fluid reservoir has a first volume, toward a second position, in which the fluid reservoir has a second volume greater than the first volume, an increase in volume producing a negative pressure differential in the fluid reservoir operable to draw a predetermined volume of bodily-fluid into the fluid reservoir;

    transitioning the flow control mechanism from the first configuration to a second configuration in response to the seal member being placed in the second position, the flow control mechanism operable to allow bodily-fluid to flow through a second fluid flow path from the inlet port to an outlet port when the flow control mechanism is in the second configuration;

    coupling the outlet port to a sample reservoir, the sample reservoir having a negative pressure that produces a suction force in at least the second fluid flow path operable to draw bodily-fluid from the patient to the sample reservoir when the flow control mechanism is placed in the second configuration; and

    at least partially obstructing the second fluid flow path when the flow control mechanism is in the second configuration to reduce the suction force in at least a portion of the second fluid flow path.

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