Filter for a cartridge, a cartridge, use of a filter in a cartridge and a system for preparing a liquid solution for a medical procedure

A cartridge containing a particulate material wherein the cartridge includes:

• an inner space for housing the particulate material;
• an inlet arranged to permit the introduction of a liquid into the inner space;
• an outlet arranged to permit the discharge of liquid from the inner space;
• and
• at least a first filter arranged at the outlet and to permit passage of the liquid through the filter, but to prevent passage of the particulate material through the filter, wherein the filter permits the liquid to pass through the filter in a filter direction (x), wherein the filter includes at least one slit-shaped opening, which has a first extension and a second extension being substantially perpendicular to the filter direction (x) and to the first extension, wherein the second extension is significantly shorter than the first extension.

A cartridge arranged to contain a particulate material, wherein the cartridge includes:

• an inner space for housing the particulate material;
• an inlet arranged to permit the introduction of a liquid into the inner space;
• an outlet arranged to permit the discharge of liquid from the inner space;
• and
• at least a second filter arranged at the inlet and to permit passage of the liquid through the filter, but to prevent passage of the particulate material through the filter, wherein to second filter permits the liquid to pass through the filter in a filter direction (x), wherein the second filter includes at least one slit-shaped opening, which has a first extension and a second extension being substantially perpendicular to the filter direction (x), and to the first extension, wherein the second extension is significantly shorter than the first extension.

A use of a filter in a cartridge containing a particulate material, wherein the cartridge includes:

• an inner space for housing the particulate material;
• an inlet arranged to permit the introduction of a liquid into the inner space an outlet arranged to permit discharge of liquid from the inner space;
• and
• at least one filter arranged at the outlet and to permit passage of the liquid through the filter, but to prevent passage of the particulate material through the filter, wherein the filter permits the liquid to pass through the filter in a filter direction (x), wherein the filter includes at least one slit-shaped opening, which has a first extension, the use including the step of supplying said liquid to the cartridge in such a way that the liquid passes through the particulate material and thereby dissolves at least a part of the particulate material to form a liquid solution.

A system for preparing a liquid solution for a medical procedure, the system including:

• a cartridge containing a particulate material in an inner space thereof and including an inlet and an outlet;
• a first liquid conduit having a first end communicating with a source of liquid to withdraw the liquid into the first liquid conduit and a second end;
• a second liquid conduit having a first end communicating with a source of liquid and a second end communicating with the inlet of the cartridge for introducing the liquid into the inner space to produce a concentrate liquid solution containing at least a part of the particulate material dissolved in the liquid;
• a third liquid conduit communicating with the outlet of the cartridge and with a mixing point in the first liquid conduit intermediate said first and second ends for conducting said concentrate liquid solution from the cartridge into said first liquid conduit to be mixed with the liquid being conducted through the first liquid conduit to thereby produce said liquid solution in the first liquid conduit for delivery to said second end of the first liquid conduit;
• and
• at least one filter g arranged at the outlet and to permit passage of the liquid through the filter, but to prevent passage of the particulate material through the filter, wherein the filter permits the liquid to pass through the filter in a filter direction (x), wherein the filter includes at least one slit-shaped opening, which has a first extension and a second extension being substantially perpendicular to the filter direction (x) and to the first extension, wherein the second extension is significantly shorter than the first extension.