Manifold assembly for a peritoneal dialysis apparatus and peritoneal dialysis apparatus comprising said manifold assembly

A manifold assembly for a peritoneal dialysis apparatus, the manifold assembly comprising:

• a casing having a flattened shape and delimiting internally a first compartment and a second compartment, wherein the casing comprises a rigid shell and a soft membrane fixed to the rigid shell;
• a yielding pump tube having a first end connected to the first compartment and a second end connected to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of a peritoneal dialysis apparatus;
• a patient line tube having a first end connected to the second compartment and a second end connectable to a peritoneal cavity of a patient;
• at least one fluid line tube having a first end connected to the first compartment and a second end connectable to a fluid source or a drain;
• and
• at least one additional fluid line tube having a first end connected to the second compartment and a second end connectable to a fluid source,
• 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 and the patient line tube, to allow fluid flow at least from the at least one fluid line tube to the patient line tube or from the patient line tube to the at least one fluid line tube when the peristaltic pump of the cycler is actuated,
• wherein the second compartment delimits a plurality of expansion chambers configured to attenuate pressure pulsations from the peristaltic pump, the plurality of expansion chambers being in part delimited by the soft membrane, and
• wherein the casing comprises one or more protrusions delimiting at least one expansion chamber of the plurality of expansion chambers, such that said at least one expansion chamber has a depth greater than a depth of a remaining part of the second compartment.

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 connected to the first compartment and a second end connected to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of a peritoneal dialysis apparatus;
• a patient line tube having a first end connected to the second compartment and a second end connectable to a peritoneal cavity of a patient;
• and
• at least one fluid line tube having a first end connected to the first compartment and a second end connectable to a fluid source or a drain, and comprising:
• a heater line tube, a heater bag being connected to a second end of the heater line tube, and a drain fluid line tube having a second end connectable to the drain,
• 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 and the patient line tube, to allow fluid flow at least from the at least one fluid line tube to the patient line tube or from the patient line tube to the at least one fluid line tube when the peristaltic pump of the cycler is actuated,
• wherein the second compartment delimits at least one expansion chamber configured to attenuate pressure pulsations from the peristaltic pump, and
• wherein the casing comprises a by-pass channel in fluid communication with the first compartment, the second compartment, and the heater line tube.

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 connected to the first compartment and a second end connected to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of a peritoneal dialysis apparatus;
• a patient line tube having a first end connected to the second compartment and a second end connectable to a peritoneal cavity of a patient;
• and
• at least one fluid line tube having a first end connected to the first compartment and a second end connectable to a fluid source or a drain,
• 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 and the patient line tube, to allow fluid flow at least from the at least one fluid line tube to the patient line tube or from the patient line tube to the at least one fluid line tube when the peristaltic pump of the cycler is actuated,
• wherein the second compartment delimits at least one expansion chamber configured to attenuate pressure pulsations from the peristaltic pump,
• wherein the casing has a flattened shape and comprises at least one protrusion delimiting the at least one expansion chamber, such that the at least one expansion chamber has a depth greater than a depth of a remaining part of the second compartment, and
• wherein the casing has an external flat surface for interfacing with at least one level sensor of the cycler and has apertures passing through the flattened shape, wherein the at least one expansion chamber comprises a plurality of expansion chambers, wherein the plurality of expansion chambers is delimited in the second compartment and the apertures are positioned between two of the plurality of expansion chambers.

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 comprises a rigid shell and a soft membrane made of a plastic sheet and fixed to the rigid shell, the rigid shell delimiting a front and sides of the casing and the soft membrane forming a back of the casing;
• a yielding pump tube having a first end connected to the first compartment and a second end connected to the second compartment, wherein the yielding pump tube extends outside the casing to be coupled to a peristaltic pump of a cycler of a peritoneal dialysis apparatus;
• a patient line tube having a first end connected to the second compartment and a second end connectable to a peritoneal cavity of a patient;
• and
• at least one fluid line tube having a first end connected to the first compartment and a second end connectable to a fluid source or a drain,
• 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 and the patient line tube, to allow fluid flow at least from the at least one fluid line tube to the patient line tube or from the patient line tube to the at least one fluid line tube when the peristaltic pump of the cycler is actuated, wherein the second compartment delimits at least one expansion chamber configured to attenuate pressure pulsations from the peristaltic pump, and
• wherein an area of the soft membrane is configured to be coupled to a displacement sensor of the cycler when the manifold assembly is mounted on the cycler, the area of the soft membrane facing a zone of the first compartment.