Medical device
AssigneeTerumo Kabushiki Kaisha
InventorOsami Shinonome
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Abstract
A medical device molded from a highly safe resin composition prepared by blending a vinyl chloride-based resin, a dialkyl malate, and a stabilizer is provided. The resin composition of the invention has physical properties equivalent to conventional resin compositions having blended therein a phthalate as the plasticizing agent, but is safer and has a higher blood storability. The medical devide may most preferably be a blood bag system.
Claims15
A flexible medical device capable of holding an erythrocyte-containing body fluid or medicament, in which a surface of the device that is to come into contact with the erythrocyte-containing material comprises a resin composition prepared by blending 100 parts by weight of a vinyl chloride-based resin;
- 5 to 100 parts by weight of a dialkyl malate represented by the general formula:
- ##STR3## wherein a and b independently represent an integer of from 2 to 12, and R represent a member selected from the group consisting of hydrogen atom, acetyl group, propionyl group, and butyryl group;
- and 1 to 20 parts by weight of a stabilizer.
In a medical device capable of holding an erythrocyte-containing body fluid or medicament therein, wherein the improvement comprises producing a surface of the device that is to be brought into contact with the erythrocyte-containing material from a resin composition prepared by blending 100 parts by weight of a vinyl chloride-based resin;
- 5 to 100 parts by weight of a dialkyl malate metalate represented by the general formula:
- ##STR4## where a and b independently represent an integer from 2 to 12, and R represents a member selected from the group consisting of hydrogen atoms, acetyl group, propionyl group, and butyryl group;
- and 1 to 20 parts by weight of a stabilizer.
A method for improving the storability of an erthyrocyte-containing body fluid or medicament present in a flexible medical device, comprising:
- producing a surface of the flexible medical device that is to be brought into contact with the erythrocyte-containing material from a resin composition prepared by blending parts by weight of a vinyl chloride-based resin;
- 5 to 100 parts by weight of a dialkyl malate represented by the general formula:
- ##STR5## wherein a and b independently represent an integer of from 2 to 12, and R represents a member selected from the group consisting of a hydrogen atom, acetyl group, propionyl group, and butyryl group;
- and 1 to 20 parts by weight of a stabilizer.
A method of making a flexible medical device suitable for holding an erythrocyte-containing body fluid or medicament comprises producing a surface of the flexible medical device that is to come into contact with the erythrocyte-containing material from a resin composition prepared by blending 100 parts by weight of a vinyl chloride-based resin;
- 5 to 100 parts by weight of a dialkyl malate metalate represented by the general formula:
- ##STR6## where a and b independently represent an integer from 2 to 12, and R represents a member selected from the group consisting of hydrogen atoms, acetyl group, propionyl group, and butyryl group;
- and 1 to 20 parts by weight of a stabilizer.
Dependencies are inferred from the claim text.