Peritoneal dialysis cycler-cassette interface
Systems, methods, and devices directed to a peritoneal dialysis cassette and an interface between the cassette and a peritoneal dialysis system is provided. The peritoneal dialysis cassette can include one or more fluid flow paths connecting a plurality of inlet/outlet ports, one or more rotary valves for selectively directing fluid through the peritoneal dialysis cassette, and a pump.
1 . A peritoneal dialysis cassette, comprising:
a housing enclosing one or more flow paths;
one or more rotary valves configured to transfer fluid therethrough,
wherein the one or more rotary valves are configured to selectively direct the fluid through the one or more flow paths;
wherein the one or more rotary valves have a plurality of positions,
wherein at least one of the positions is a closed position that prevents flow of the fluid through the one or more rotary valves,
wherein the one or more rotary valves each contain two openings on opposite sides of each valve of the one or more rotary valves, the two openings defining a single flow path disposed through each valve of the one or more rotary valves,
wherein an upper flow path of the one or more flow paths is configured to fluidly connect to the single flow path disposed through each valve of the one or more rotary valves along a larger arc adjacent to each valve of the one or more rotary valves than an arc adjacent to each valve of the one or more rotary valves to fluidly connect to a plurality of lower flow paths of the one or more flow paths.
2 . The peritoneal dialysis cassette of claim 1 , wherein the one or more flow paths fluidly connect at least two inlet/outlet ports; the one or more rotary valves selectively directing the fluid through the one or more flow paths from a first specified inlet/outlet port of the at least two inlet/outlet ports to a second specified inlet/outlet port of the at least two inlet/outlet ports.
3 . The peritoneal dialysis cassette of claim 2 , wherein the at least two inlet/outlet ports are disposed on a side of the housing.
4 . The peritoneal dialysis cassette of claim 2 , wherein the at least two inlet/outlet ports are disposed on a first rigid surface of the dialysis cassette.
5 . The peritoneal dialysis cassette of claim 1 , wherein the housing comprises a first rigid surface and a second rigid surface.
6 . The peritoneal dialysis cassette of claim 5 , wherein the first rigid surface is connected to the second rigid surface by any combination of ultrasonic welding, hot plate welding, laser welding and adhesive.
7 . The peritoneal dialysis cassette of claim 1 , further comprising at least one opening in the housing for a membrane of a pressure sensor; the at least one opening in at least one of the one or more flow paths.
8 . A system, comprising:
the peritoneal dialysis cassette of claim 1 ,
one or more servo motors insertable into the one or more rotary valves.
9 . The system of claim 8 , wherein the one or more servo motors are controlled to selectively direct the fluid through the one or more flow paths.
10 . The system of claim 8 , wherein the one or more rotary valves comprise at least two rotary valves; each of the at least two rotary valves each engageable with a separate servo motor of the one or more servo motors.
11 . The system of claim 8 , further comprising a temperature sensor.
12 . The peritoneal dialysis cassette of claim 1 , wherein the one or more rotary valves includes a flow director seal to prevent the fluid from leaking into unintended flow paths of the one or more flow paths.
13 . The peritoneal dialysis cassette of claim 1 , wherein the one or more rotary valves is three rotary valves.
14 . The peritoneal dialysis cassette of claim 1 , wherein the housing includes a window configured to allow a temperature sensor to measure a temperature of the fluid.
15 . The peritoneal dialysis cassette of claim 1 , further including:
eight inlet/outlet ports fluidly connected to the one or more flow paths, wherein the inlet/outlet ports permit transfer of the fluid into the dialysis cassette and out of the dialysis cassette.