Sensing Negative Pressure with a Pressure Transducer
AssigneeFresenius Medical Care Holdings, Inc.
InventorMichael James Beiriger
Life of this patent
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Abstract
A medical system includes a medical fluid pumping machine comprising a pressure sensor, a medical fluid line set comprising a fluid line in fluid communication with a fluid passage formed between a diaphragm and a base, the medical fluid line set being configured to be connected to the medical fluid pumping machine in a manner such that the diaphragm of the medical fluid line set aligns with the pressure sensor of the medical fluid pumping machine, and a member configured to apply a positive force to the pressure sensor when the medical fluid line set is connected to the medical fluid pumping machine and the fluid passage is at atmospheric pressure.
Claims36
A medical system comprising:
- a medical fluid pumping machine comprising a pressure sensor;
- a medical fluid line set comprising a fluid line in fluid communication with a fluid passage formed between a diaphragm and a base, the medical fluid line set being configured to be connected to the medical fluid pumping machine in a manner such that the diaphragm of the medical fluid line set aligns with the pressure sensor of the medical fluid pumping machine;
- and
- a member configured to apply a positive force to the pressure sensor when the medical fluid line set is connected to the medical fluid pumping machine and the fluid passage is at atmospheric pressure.
A medical fluid line set comprising:
- a fluid line in fluid communication with a fluid passage formed between a diaphragm and a base, the medical fluid line set being configured to be connected to a medical fluid pumping machine in a manner such that the diaphragm of the medical fluid line set aligns with a pressure sensor of the medical fluid pumping machine;
- and
- a member configured to apply a positive force to the pressure sensor when the medical fluid line set is connected to the medical fluid pumping machine and the fluid passage is at atmospheric pressure.
A medical fluid pumping machine comprising:
- a pressure sensor;
- and
- a member that is affixed to the pressure sensor and protrudes outwardly from a face of the dialysis machine to contact a portion of a medical fluid line set when the medical fluid line set is connected to the medical fluid pumping machine.
A method comprising:
- applying an initial positive force to a pressure sensor of a medical fluid pumping machine by connected a medical fluid line set to the medical fluid pumping machine;
- applying an additional force to the pressure sensor;
- and
- detecting a combination of the initial positive force and the additional force.
Dependencies are inferred from the claim text.