Peritoneal dialysis machine
First Claim
1. A peritoneal dialysis machine comprising:
- a housing;
a mechanically actuated piston head extending from a pump actuator housed by the housing, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette, the fluid pumping cassette coupled operably to the housing such that a flexible membrane of the fluid pumping cassette faces the piston head;
a pressure sensor located adjacent to the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; and
a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette.
2 Assignments
0 Petitions
Accused Products
Abstract
A peritoneal dialysis machine including: a housing; a mechanically actuated piston head extending from a pump actuator housed by the housing, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette, the fluid pumping cassette coupled operably to the housing such that a flexible membrane of the fluid pumping cassette faces the piston head; a pressure sensor positioned by the housing adjacent to the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; and a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette.
-
Citations
22 Claims
-
1. A peritoneal dialysis machine comprising:
-
a housing; a mechanically actuated piston head extending from a pump actuator housed by the housing, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette, the fluid pumping cassette coupled operably to the housing such that a flexible membrane of the fluid pumping cassette faces the piston head; a pressure sensor located adjacent to the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; and a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A peritoneal dialysis machine comprising:
-
a mechanically actuated piston head extending from a pump actuator, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette coupled operably to the machine such that a flexible membrane of the pumping cassette faces the piston head; a pressure sensor positioned adjacent the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette; and a line occlusion test performed by the machine in which a line occlusion is determined if the pressure sensor detects a pressure rise when the piston head is extending towards the cassette to push the medical fluid out of the cassette. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. A peritoneal dialysis machine comprising:
-
a mechanically actuated piston head extending from a pump actuator, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette coupled operably to the machine such that a flexible membrane of the pumping cassette faces the piston head; a fluid valve positioned adjacent to the piston head and operable with the fluid pumping cassette; a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette; and a priming procedure performed by the machine in which a position of the mechanically actuated piston head is monitored to determine when to open the fluid valve to allow communication between a pump chamber portion of the fluid pumping cassette and a line extending from the fluid pumping cassette being primed. - View Dependent Claims (20)
-
-
21. A peritoneal dialysis machine comprising:
-
a mechanically actuated piston head extending from a pump actuator, the mechanically actuated piston head positioned to extend towards and away from a fluid pumping cassette coupled operably to the machine such that a flexible membrane of the pumping cassette faces the piston head; a pressure sensor positioned adjacent the mechanically actuated piston head so as to sense a pressure of a medical fluid moved by the mechanically actuated piston head within the fluid pumping cassette; a vacuum chamber formed about the mechanically actuated piston head, the vacuum chamber holding a vacuum that sucks the flexible membrane of the fluid pumping cassette onto the mechanically actuated piston head as the mechanically actuated piston head extends away from the fluid pumping cassette; and a leak test performed by monitoring a position of the mechanically actuated piston head while causing the mechanically actuated piston head to apply a constant force to the flexible membrane of the fluid pumping cassette when it is expected that the mechanically actuated piston head will be held stationary. - View Dependent Claims (22)
-
Specification