Pressure Output Device for Extracorporeal Hemodialysis Machine
OwnerJames M. Brugger, Peter M. Czechowicz, JR.inventors
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Abstract
A pressure output device (POD) for sensing fluid pressure in a blood line set includes a base including an inlet port and an outlet port. The POD further includes a cap coupled to the base to form an interior chamber of the POD, the cap including an outer shell, a pressure sensor port extending from the outer shell, and a tab extending inwardly from an inner surface of the outer shell. The POD also includes a flexible diaphragm coupled to the cap and positioned over the base to divide the interior chamber into a fluid chamber and a pressure sensing chamber, the tab configured to deform a portion of the flexible diaphragm.
Claims21
A pressure output device (POD) for sensing fluid pressure in a blood line set, the POD comprising:
- a base comprising an inlet port and an outlet port;
- a cap coupled to the base to form an interior chamber of the POD, the cap comprising:
- an outer shell;
- a pressure sensor port extending from the outer shell;
- and
- a tab extending inwardly from an inner surface of the outer shell;
- a flexible diaphragm coupled to the cap and positioned over the base to divide the interior chamber into a fluid chamber and a pressure sensing chamber, the tab configured to deform a portion of the flexible diaphragm.
A method of assembling a pressure output device (POD), the method comprising:
- bending a tab of a first portion of the POD into a bent configuration in which the tab is configured to form a dimple in a portion of a flexible diaphragm when the flexible diaphragm is in contact with the tab, the portion of the flexible diaphragm being positioned below a pressure sensor outlet of the POD;
- and
- connecting the first portion of the POD, the flexible diaphragm, and a second portion of the POD.
A blood treatment system, comprising:
- a blood treatment machine;
- a blood line set configured to be connected to the blood treatment machine;
- and
- a pressure output device (POD) for sensing fluid pressure in the blood line set, the POD comprising:
- a base comprising an inlet port and an outlet port;
- a cap coupled to the base to form an interior chamber of the POD, the cap comprising:
- an outer shell;
- a pressure sensor port extending from the outer shell;
- and
- a tab extending inwardly from an inner surface of the outer shell;
- a flexible diaphragm coupled to the cap and positioned over the base to divide the interior chamber into a fluid chamber and a pressure sensing chamber, the tab configured to deform a portion of the flexible diaphragm.
Dependencies are inferred from the claim text.