Infusion device with a hydrophilic sintered porous plastic or hydrophilic porous fiber air stop filter

An infusion device, comprising:

• an infusion bag;
• a drip chamber defining a reservoir in fluid cooperation with the infusion bag;
• an infusion line leading from the drip chamber to a patient, the infusion line configured to deliver a fluid or a medicament to the patient;
• and,
• a plasma treated hydrophilic porous filter is selected from a hydrophilic sintered porous plastic filter or a hydrophilic porous fiber filter and is positioned within the drip chamber reservoir or within the infusion line so that the fluid or the medicament can flow through the filter and so that air is prevented or retarded from moving through the filter,
• wherein the plasma treated hydrophilic porous filter is further treated with a coating comprising pharmaceutical grade molecules to preserve hydrophilic properties of the filter, wherein the coating to preserve hydrophilic properties of the filter comprises positively charged amino acids,
• wherein the plasma treated hydrophilic porous filter is self-supporting without additional support structure, rigid, and is frictionally fit into the drip chamber reservoir or the infusion line.