Systems and methods for delivering a fluid to a patient with reduced contamination
Inventors
Bullington, Gregory J. • Patton, Richard G. • Gaw, Shan E.
Assignees
Magnolia Medical Technologies Ltd • Magnolia Medical Technologies Inc
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Publication Number
US-9931466-B2
Publication Date
2018-04-03
Expiration Date
Abstract
An apparatus includes a cannula assembly, a housing, a fluid reservoir, a flow control mechanism, and an actuator. The housing includes an inlet port removably coupled to the cannula assembly and defines an inner volume. The fluid reservoir is fluidically coupled to the housing and configured to receive and isolate a volume of bodily fluid from a patient. The flow control mechanism is at least partially disposed in the inner volume. The actuator is operably coupled to the flow control mechanism and is configured to move the flow control mechanism between a first configuration, in which bodily fluid can flow, via a fluid flow path defined by the flow control mechanism, from the cannula assembly, through the inlet port and into the fluid reservoir, to a second configuration, in which the fluid reservoir is fluidically isolated from the cannula assembly.
Core Innovation
The described fluid-transfer apparatus comprises a cannula assembly, a housing having an inlet port removably coupled to the cannula assembly, a movable fluid reservoir, a flow control mechanism, and an actuator. Movement of the fluid reservoir creates negative pressure to draw, receive, and isolate a first volume of bodily fluid from a patient through a defined fluid flow path. The actuator moves the flow control mechanism relative to the housing to switch fluid connections and place the reservoir in fluidic isolation from the cannula assembly.
Structural arrangements combine the cannula assembly, housing, movable reservoir, flow-control mechanisms, and tubing connections to establish fluid communication with a patient. Specific embodiments divert an initial volume of bodily fluid, potentially carrying skin-derived contaminants, into the isolated reservoir before switching the flow path to deliver parenteral fluid from a fluid source to the patient. The background section and the problem being solved are not explicitly described in patent.
Claims Coverage
The independent claims, claims 1 and 15, cover four inventive features directed to an apparatus for withdrawing and isolating bodily fluid.
Cannula assembly and housing
Claims 1 and 15 recite a cannula assembly and a housing defining an inner volume, having an inlet port configured to be removably coupled to the cannula assembly.
Movable fluid reservoir
The fluid reservoir is configured to move between configurations or positions to generate negative pressure, receiving and isolating a first volume of bodily fluid withdrawn from the patient.
Flow control mechanism and fluid flow path
The flow control mechanism is at least partially disposed in the inner volume of the housing and configured to move relative to the housing between first and second configurations, defining a fluid flow path between the cannula assembly and the fluid reservoir in the first configuration.
Actuator-controlled fluidic isolation
The actuator is operably coupled to the flow control mechanism to move it from the first configuration, allowing bodily fluid flow in response to negative pressure, to a second configuration in which the fluid reservoir is fluidically isolated from the cannula assembly.
Together, the independent claims cover an apparatus that generates negative pressure via a movable reservoir to receive and isolate a first volume of bodily fluid and utilizes an actuator-operated flow control mechanism to establish fluidic isolation.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Withdrawing and diverting an initial predetermined volume of bodily fluid from a patient into an isolated reservoir.
Connecting a patient to a fluid source to deliver parenteral fluid following fluid collection and isolation of the reservoir.
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