Medical device
AssigneeTerumo Kabushiki Kaisha
InventorTomoya Oiwa
Life of this patent
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Abstract
The disclosed medical device has high visibility on non-woven fabric having a color such as green, blue, or the like, excellent identifiability from other medical devices having a color such as green, blue, or the like, and high surface smoothness. The medical device comprises an elongated body and a resin layer for covering at least a proximal portion of the elongated body, in which the resin layer has a first layer which includes a first fluororesin, titanium oxide, and a dispersant, and a second layer which is formed on the first layer and includes a second fluororesin. The content of the titanium oxide is 30% by weight or more relative to the solid content of the first layer, and an acid value of the dispersant is 20 to 90 mg/KOH.
Claims23
A medical device possessing a proximal-most end, the medical device comprising:
- an elongated body possessing a distal-most end, a proximal-most end and a distal portion extending from the distal-most end of the elongated body towards the proximal-most end of the elongated body;
- a first resin layer covering the proximal portion of the elongated body and not covering the distal portion of the elongated body, the first resin layer having a composition that includes a first fluororesin, titanium oxide, and a polymer dispersant that facilitates dispersion of the titanium oxide in the first fluororesin;
- a second resin layer covering the first resin layer and not covering the distal portion of the elongated body, the second resin layer having a composition that includes a second fluororesin;
- a content of the titanium oxide in the first resin layer is 30% by weight or more relative to a solid content of the first resin layer to color so that the proximal part of the medical device is colored, is visible against a colored fabric used in an operating room and is identifiable from other medical devices that are colored;
- and
- the polymer dispersant possessing an acid value that is 20 to 90 mgKOH/g and an amine value that is 30 mgKOH/g or more and 80 mgKOH/g or less to inhibit reduction of dispersion of the titanium oxide in the first fluororesin and improve surface smoothness of the proximal part of the medical device.
A medical device comprising:
- an elongated body and a resin layer covering at least a proximal portion of the elongated body,
- the resin layer comprising:
- i) a first layer which includes a first fluororesin, titanium oxide, and a dispersant;
- and ii) a second layer which is formed on the first layer and includes a second fluororesin,
- a content of the titanium oxide is 30% by weight or more relative to solid content of the first layer, and
- an acid value of the dispersant is 20 to 90 mgKOH/g and an amine value of the dispersant is 30 mgKOH/g or more and 80 mgKOH/g or less, and the dispersant improves surface smoothness of the proximal portion of the medical device.
A method for producing a medical device comprising:
- coating a first coating solution on at least a proximal portion of an elongated body to form a first coating film on the proximal portion of the elongated body, the first coating solution that is coated on the proximal portion of the elongated body to form the first coating film including a first fluororesin, titanium oxide, and a dispersant having an acid value of 20 to 90 mgKOH/g and an amine value of 30 mgKOH/g or more and 80 mgKOH/g or less to improve surface smoothness of the proximal portion of the medical device;
- and
- coating a second coating solution on the first coating film to form a second coating film, the second coating solution that is coated on the first coating film to form the second coating film including a second fluororesin;
- and
- baking the elongated body coated with the first and second coating films at a temperature which is equal to or higher than a melting point of the first fluororesin and a melting point of the second fluororesin.
Dependencies are inferred from the claim text.