Tube for medical applications and circuit incorporating such tube
AssigneeGambro Lundia AB
InventorsHermann Goehl, Martin Hanna, Marcello Malagoli, Annalisa Delnevo
Life of this patent
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Abstract
A tube for medical applications comprises a chlorine-free material and has a layer defining an outer surface of the tube. The tube is manufactured from a polymer material having a solubility parameter within the range 9.9±1.5 (cal/cm3)1/2.
Claims18
A blood circulation circuit comprising flexible components being made from a chlorine-free polymer material and including flexible tubes being made from a chlorine-free polymer material,
- each of said flexible tubes presenting at least one inner layer and one radially outer layer,
- the at least one inner layer being made from a combination of at least one polyolefin and at least one elastomer,
- the at least one radially outer layer being made from thermoplastic polyurethane,
- each of said flexible tubes presenting at least a corresponding end portion having said one inner and said one radially outer layers,
- said blood circulation circuit further comprising at least one rigid component being made from a chlorine-free polymer material and comprising a casing being made from a chlorine-free polymer material and second portions of said casing being made from a chlorine-free polymer material,
- the second portions of said at least one rigid component presenting one inner surface and one radially outer surface and being made from a material selected from the group consisting of PETG, MBS and SEBS-based compound,
- said PETG, MBS and SEBS-based compound being made from a chlorine-free polymer material and having a corresponding solubility parameter lying within a range of 9.9±1.5 (cal/cm3)1/2,
- the radially outer layer of thermoplastic polyurethane of the end portions of said flexible tubes having a solubility parameter lying within a range of 9.9±1.5 (cal/cm3)1/2 being hermetically sealed to the corresponding inner surface of the second portion of said casing made from a material selected from the group consisting of PETG, MBS and SEBS-based compound and having a solubility parameter lying within a range of 9.9±1.5 (cal/cm3)1/2 so that the end portions of the flexible tubes and the second portions of the casing can be being joined together by means of a chemical joint using a solvent having a solubility parameter lying within said range.
A blood circulation circuit comprising flexible components being made from a chlorine-free polymer material and including flexible tubes being made from a chlorine-free polymer material, each of said flexible tubes presenting at least a corresponding end portion, at least one of said flexible tubes presenting at least one inner layer and one radially outer layer, the at least one radially outer layer being made from thermoplastic polyurethane,
- said blood circulation circuit further comprising at least one rigid component being made from a chlorine-free polymer material and having a corresponding solubility parameter lying within a range of 9.9±1.5 (cal/cm3)1/2,
- said rigid component presenting a casing being made from a chlorine-free polymer material, second portions being made from a chlorine-free polymer material and connectors being made from a chlorine-free polymer material,
- said flexible tubes further comprising at least one tube having opposed ends, the opposite ends being joined to corresponding connectors provided on said casing to form at least a U-shaped portion positioned so that the U-shaped portion can be coupled to a corresponding rotor of a pump,
- wherein the flexible tube including the U-shaped portion for the pump rotor is a single-layer tube made of thermoplastic polyurethane having a corresponding solubility parameter lying within a range of 9.9±1.5 (cal/cm3)1/2 so that the end portions of the flexible tube and the connectors of the casing can be being joined together by means of a chemical joint using a solvent having a solubility parameter lying within said range, and
- wherein the flexible tubes presenting at least one inner layer and one radially outer layer define at least a venous branch and an arterial branch, at least the radially outer layer of their corresponding end portion being hermetically sealed to the second portions of the casing.
Dependencies are inferred from the claim text.