Means for using single force sensor to supply all necessary information for determination of status of medical pump
First Claim
1. A medical pump for use with a cassette having a pumping chamber, comprising:
- a pumping element adapted to forcibly press on and intermittently pressurize the pumping chamber during a pumping cycle, wherein the pumping element includes a piston head connected to a main body;
means for closing the pumping chamber to flow during at least a portion of the pump cycle when the pumping chamber is pressurized by the pumping element; and
a single pressure sensor operatively connected to the pumping element to detect the pressure exerted by the pumping element on the pumping chamber, the single pressure sensor rigidly connected in a force bearing relationship to at least one of the piston head and the main body.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical pump, for use with a cassette having a pumping chamber, includes a pumping element with a piston slider assembly which intermittently pressurizes the pumping chamber during a pumping cycle and has a piston head connected to a main body with a single pressure sensor positioned therebetween. A camshaft is associated with the pumping element, an inlet control element, and an outlet control element for closing the pumping chamber to flow when the pumping chamber is pressurized. A processing unit receives pressure and position data from the pressure sensor and a position sensor associated with the pumping element, and processes this data to determine the operating condition of the pump. The operating conditions determined include: blocked fluid flow, no fluid in the line, no cassette associated with the pump, proper pump priming, or proper valve sealing.
62 Citations
20 Claims
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1. A medical pump for use with a cassette having a pumping chamber, comprising:
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a pumping element adapted to forcibly press on and intermittently pressurize the pumping chamber during a pumping cycle, wherein the pumping element includes a piston head connected to a main body; means for closing the pumping chamber to flow during at least a portion of the pump cycle when the pumping chamber is pressurized by the pumping element; and a single pressure sensor operatively connected to the pumping element to detect the pressure exerted by the pumping element on the pumping chamber, the single pressure sensor rigidly connected in a force bearing relationship to at least one of the piston head and the main body. - View Dependent Claims (2, 3, 4, 5)
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6. A medical pump for use with a cassette having a pumping chamber, comprising:
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a pumping element including a piston slider assembly adapted to intermittently pressurize and forcibly press on the pumping chamber during a pumping cycle, the piston slider assembly having a piston head connected to a main body, the piston head adapted to contact the pumping chamber; and a single pressure sensor rigidly connected to the pumping element in a force bearing relationship with the piston head and the main body to directly detect the pressure exerted by the pumping element on the pumping chamber. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A medical pump for use with a cassette having a pumping chamber, comprising:
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a pumping element adapted to intermittently pressurize and to press on the pumping chamber during a pumping cycle, wherein the pumping element includes a piston slider assembly having a piston head connected to a main body, the piston head adapted to contact the pumping chamber; an inlet control element and an outlet control element adapted to close the pumping chamber to flow; a camshaft associated with the pumping element, inlet control element, and outlet control element for closing the pumping chamber to flow during at least a portion of the pump cycle when the pumping chamber is pressurized by the pumping element; and a single pressure sensor operatively connected to the pumping element to detect the pressure exerted by the pumping element on the pumping chamber, the single pressure sensor rigidly connected to the piston slider assembly in a force bearing relationship with at least one of the piston head and the main body. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification