Flow condition sensor assembly for patient infusion device
First Claim
1. A device for delivering fluid to a patient, comprising:
- A) an exit port assembly adapted to connect to a transcutaneous patient access tool;
B) a flow path extending from the exit port assembly; and
C) a flow condition sensor assembly including, a resilient diaphragm having opposing first and second surfaces, with the first surface positioned against the flow path, a chamber wall positioned adjacent the second surface of the diaphragm and defining a sensor chamber adjacent the second surface of the diaphragm, and at least one sensor arranged to provide a threshold signal when the second surface of the diaphragm expands into the chamber in response to at least one predetermined fluid flow condition occurring in the flow path.
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Accused Products
Abstract
A device for delivering fluid to a patient including an exit port assembly adapted to connect to a transcutaneous patient access tool, a flow path extending from the exit port assembly, and a flow condition sensor assembly including a resilient diaphragm having opposing first and second surfaces. The first surface of the diaphragm is positioned against the flow path, and a chamber wall is positioned adjacent the second surface of the diaphragm and defines a sensor chamber against the second surface of the diaphragm. At least one sensor is arranged to provide a threshold signal when the second surface of the diaphragm expands into the chamber in response to at least one predetermined fluid flow condition occurring in the flow path.
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Citations
97 Claims
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1. A device for delivering fluid to a patient, comprising:
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A) an exit port assembly adapted to connect to a transcutaneous patient access tool;
B) a flow path extending from the exit port assembly; and
C) a flow condition sensor assembly including, a resilient diaphragm having opposing first and second surfaces, with the first surface positioned against the flow path, a chamber wall positioned adjacent the second surface of the diaphragm and defining a sensor chamber adjacent the second surface of the diaphragm, and at least one sensor arranged to provide a threshold signal when the second surface of the diaphragm expands into the chamber in response to at least one predetermined fluid flow condition occurring in the flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 86, 87, 88)
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51. A device for delivering fluid to a patient, comprising:
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A) a flow path extending from the exit port assembly;
B) a flow condition sensor assembly including, a resilient diaphragm having opposing first and second surfaces, with the first surface positioned against the flow path, a chamber wall positioned adjacent the second surface of the diaphragm and defining a sensor chamber adjacent the second surface of the diaphragm, and at least one sensor arranged to provide a threshold signal when the second surface of the diaphragm expands into the chamber by a predetermined amount; and
C) a processor connected to the sensor and programmed to provide a signal indicative of an undesired flow condition upon receiving the threshold signal from the sensor for more than a predetermined maximum period or for less than a predetermined minimum period. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85)
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89. A method for determining a fluid flow condition in a flow path, comprising:
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positioning a first side of a resilient diaphragm against the flow path;
positioning a chamber wall adjacent a second surface of the diaphragm, the chamber wall defining a sensor chamber adjacent the second surface of the diaphragm;
providing a threshold signal when the second surface of the diaphragm expands into the chamber by a predetermined amount;
timing the duration of the threshold signal; and
providing a signal indicative of a predetermined flow condition if the duration of the threshold signal is greater than a predetermined maximum period or less than a predetermined minimum period. - View Dependent Claims (90, 91, 92, 93, 94, 95, 96, 97)
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Specification