Manifold assembly for a peritoneal dialysis apparatus and peritoneal dialysis apparatus comprising said manifold assembly
A manifold assembly for a peritoneal dialysis apparatus, comprises: a casing delimiting internally a first compartment and a second compartment; a yielding pump tube having a first end connected or connectable to the first compartment and a second end connected or connectable to the second compartment. The yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of a peritoneal dialysis apparatus. A first pump port and a second pump port are placed on a first side of the casing and ports are placed on a second side of the casing, opposite the first side.
1 . A manifold assembly for a peritoneal dialysis apparatus, the manifold assembly comprising:
a casing delimiting internally a first compartment and a second compartment;
a yielding pump tube having a first end fluidly coupled to the first compartment and a second end fluidly coupled to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of the peritoneal dialysis apparatus, wherein the casing comprises a first pump port connected to the first end of the yielding pump tube and a second pump port connected to the second end of the yielding pump tube; and
a plurality of line tubes each having a first end connected to the first compartment or to the second compartment and a second end connected to a fluid source, a drain, or a patient, wherein the casing comprises a plurality of ports each connected to the first end of one line tube of the plurality of line tubes,
wherein the casing has a flattened shape provided with a front, a back, and a plurality of sides, wherein the back is configured to be coupled to a front panel of the cycler, and
wherein the first pump port and the second pump port are placed on a first side of the casing, wherein the plurality of ports are placed on a second side of the casing, opposite the first side.
2 . The assembly of claim 1 , wherein each of the first pump port, the second pump port, and the plurality of ports protrudes from the respective side of the casing.
3 . The assembly of claim 1 , wherein each of the first pump port, the second pump port, and the plurality of ports is shaped like a hollow cylinder.
4 . The assembly of claim 3 , wherein the hollow cylinders of the plurality of ports are parallel to each other.
5 . The assembly of claim 3 , wherein the hollow cylinders of the first pump port and the second pump port diverge from each other away from the casing such that the yielding pump tube is shaped as a loop having an omega shape.
6 . The assembly of claim 1 , wherein the casing has an outline with two long sides and two short sides, wherein the first side and the second side are sides of the casing that are longer than a third side and a fourth side.
7 . The assembly of claim 1 , wherein the casing comprises a rigid shell, defining the front and the plurality of sides of the casing, and one soft membrane defining the back of the casing.
8 . The assembly of claim 1 , wherein the casing has through apertures passing through the casing, wherein the through apertures are configured to engage with retaining elements of the cycler.
9 . The assembly of claim 1 , wherein the casing comprises at least one protrusion delimiting at least one expansion chamber in the second compartment, such that the at least one expansion chamber has a depth greater than a depth of a remaining part of the second compartment, wherein the at least one protrusion protrudes from the front of the casing.
10 . The assembly of claim 9 , wherein an inner volume of the second compartment, comprising the at least one expansion chamber, is greater than an inner volume of the first compartment, and wherein, when the manifold assembly is mounted on the cycler, an upper part of the second compartment delimits an air buffer volume.
11 . The assembly of claim 9 , wherein the plurality of expansion chambers are configured to attenuate pressure pulsations from the peristaltic pump, wherein the plurality of expansion chambers are in part delimited in the second compartment by one soft membrane.
12 . The assembly of claim 1 , wherein the first compartment is a first elongated passage extending between one of the plurality of line tubes and the first end of the yielding pump tube, wherein the first elongated passage is U-shaped.
13 . The assembly of claim 9 , wherein the casing comprises through apertures passing through the casing, the through apertures being located between two of the plurality of protrusions.
14 . The assembly of claim 1 , wherein the casing comprises a breathable membrane joined to an edge of a hole in the casing and configured, when the manifold assembly is mounted on the cycler, to put into communication a pressure transducer and/or an air pump of the cycler with an upper part of the second compartment.
15 . The assembly of claim 14 , wherein the hole in the casing is fashioned in the front of the casing wherein a rigid frame supports the breathable membrane.
16 . The assembly of claim 1 , wherein the first compartment is a U-shaped elongated passage and the second compartment is partly surrounded by the U-shaped elongated passage.
17 . The assembly of claim 1 , wherein the plurality of line tubes comprises:
a patient line tube having a first end fluidly coupled to the second compartment and a second end connectable to a peritoneal cavity of the patient, wherein a patient port of the plurality of ports is connected to the first end of the patient line tube; and
at least one fluid line tube having a first end fluidly coupled to the first compartment and a second end fluidly coupled to the fluid source or the drain, wherein one line tube of the plurality of line tubes has a first end fluidly coupled to the second compartment and a second end fluidly coupled to the fluid source, wherein fluid ports of the plurality of ports are connected to one of the first ends of the plurality of line tubes.
18 . The assembly of claim 1 , wherein the casing comprises a by-pass channel in fluid communication with the first compartment, the second compartment, and a heater line tube, wherein the by-pass channel is in part delimited by a cover joined to an exterior surface of the casing.
19 . The assembly of claim 18 , wherein the first compartment comprises a by-pass port in fluid communication with the by-pass channel, wherein the by-pass port comprises a respective valve or part of a valve, and wherein the by-pass port has a seat for accommodating, at least partially, a respective occlusion element of the cycler.
20 . A manifold assembly for a peritoneal dialysis apparatus, the manifold assembly comprising:
a casing delimiting internally a first compartment and a second compartment, wherein the casing has a flattened shape provided with a front, a back, and a plurality of sides, the back being configured for coupling to a front panel of a cycler of the peritoneal dialysis apparatus;
a yielding pump tube having a first end fluidly coupled to the first compartment and a second end fluidly coupled to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of the cycler, wherein the casing comprises a first pump port connected to the first end of the yielding pump tube and a second pump port connected to the second end of the yielding pump tube; and
a plurality of line tubes each having a first end connected to the first compartment or the second compartment and a second end connected to a fluid source, a drain, or a patient, wherein the casing comprises a plurality of ports each connected to the first end of one line tube of the plurality of line tubes,
the plurality of line tubes comprising:
a patient line tube having a first end fluidly coupled to the second compartment and a second end connectable to a peritoneal cavity of the patient,
at least one fluid line tube having a first end fluidly coupled to the first compartment and a second end connectable to the fluid source or the drain, and
at least one additional fluid line tube having a first end fluidly coupled or connectable to the second compartment and a second end connectable to the fluid source,
wherein the first pump port and the second pump port are placed on a first side of the casing, and the plurality of ports are placed on a second side of the casing, opposite the first side, and
wherein the first compartment, the yielding pump tube, and the second compartment delimit together a fluid path extending between the at least one fluid line tube, having the first end fluidly coupled to the first compartment, and the patient line tube, to allow fluid flow at least from the at least one fluid line tube, having the first end fluidly coupled to the first compartment, through the yielding pump tube and to the patient line tube or from the patient line tube, through the yielding pump tube and to the at least one fluid line tube, having the first end fluidly coupled to the first compartment, when the peristaltic pump of the cycler is actuated.
21 . The assembly of claim 20 , wherein the plurality of line tubes further comprises a heater line tube having a first end fluidly coupled to the first compartment, and a heater bag fluidly coupled to a second end of the heater line tube, the heater bag being configured to be coupled to a heater of the cycler, and
wherein the casing comprises a by-pass channel in fluid communication with the first compartment, the second compartment, and the heater line tube.