SYSTEMS AND METHODS FOR MEASURING FLUID PRESSURE WITHIN A DISPOSABLE IV SET CONNECTED TO A FLUID SUPPLY PUMP
First Claim
1. A non-contact pressure sensing system for measuring either positive or negative fluid pressures within an isolated fluid pathway using a chamber incorporated within the isolated fluid pathway and connected to a fluid supply pump, the system comprising:
- a sensor base coupled to a pump and having at least one sensing arrangement being stationary with respect to the sensor base, the sensing arrangement configured to generate a measuring signal indicative of a sensed measurement variable;
a measurement circuit electrically connected to the sensing arrangement to receive the measuring signal;
a chamber or housing configured for attaching to the sensor base, the chamber having;
a fluid inlet and a fluid outlet, anda movable element configured to move with changes in fluid pressure within the chamber and thereby cause a change in the sensed measurement variable without contacting the sensing arrangement, the amount of movement of the movable element being related to the amount of change in fluid pressure.
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Accused Products
Abstract
Systems and methods of measuring pressure of fluid in a disposable IV set connected to a fluid supply pump is disclosed. At least one sensing arrangement coupled to the fluid supply pump is provided. A chamber having a movable element is provided, the movable element configured to move in response to changes in fluid pressure within the disposable IV set and thereby cause a change in a sensed measurement variable associated with the sensing arrangement without contacting the sensing arrangement. A measuring signal indicative of the sensed measurement variable is generated. The fluid pressure within the disposable IV set is determined based on the measuring signal.
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Citations
34 Claims
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1. A non-contact pressure sensing system for measuring either positive or negative fluid pressures within an isolated fluid pathway using a chamber incorporated within the isolated fluid pathway and connected to a fluid supply pump, the system comprising:
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a sensor base coupled to a pump and having at least one sensing arrangement being stationary with respect to the sensor base, the sensing arrangement configured to generate a measuring signal indicative of a sensed measurement variable; a measurement circuit electrically connected to the sensing arrangement to receive the measuring signal; a chamber or housing configured for attaching to the sensor base, the chamber having; a fluid inlet and a fluid outlet, and a movable element configured to move with changes in fluid pressure within the chamber and thereby cause a change in the sensed measurement variable without contacting the sensing arrangement, the amount of movement of the movable element being related to the amount of change in fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cassette configured for attaching to a fluid supply pump, the cassette comprising:
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a pumping chamber having a fluid inlet and a fluid outlet and configured to receive a fluid from a fluid storage unit via the fluid inlet, and a diaphragm structure coupled to the pumping chamber, the diaphragm structure comprising a movable element configured to move with changes in fluid pressure within the pumping chamber and thereby cause a change in a sensed measurement variable sensed by at least one sensing arrangement coupled to the fluid supply pump without contacting the sensing arrangement, the amount of movement of the movable element being related to the amount of change in fluid pressure. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of measuring pressure of fluid in a disposable IV set connected to a fluid supply pump, the method comprising:
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providing at least one sensing arrangement coupled to the fluid supply pump; providing a chamber having a movable element configured to move with the movable element in response to changes in fluid pressure within the disposable IV set and thereby cause a change in a sensed measurement variable associated with the sensing arrangement without contacting the sensing arrangement; generating a measuring signal indicative of the sensed measurement variable; and determining the fluid pressure within the disposable IV set based on the measuring signal. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification