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 intermittently pressurize the pumping chamber during a pumping cycle;
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.
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.
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Citations
22 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 intermittently pressurize the pumping chamber during a pumping cycle;
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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 the pumping chamber during a pumping cycle, the piston slider assembly having a piston head connected to a main body, the piston head is adapted to contact the pumping chamber; and
a pressure sensor is connected to the pumping element between the piston head and the main body to detect the pressure exerted by the pumping element on the pumping chamber. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A medical pump for use with a cassette having a pumping chamber, comprising:
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a pumping element adapted to intermittently pressurize the pumping chamber during a pumping cycle;
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 pressure sensor operatively connected to the pumping element to detect the pressure exerted by the pumping element on the pumping chamber. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification