Methods of forming medical devices
First Claim
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1. A method of plating a medical device, the medical device comprising an oxidizable substrate, the method comprising:
- cleaning the substrate with a cleaning and etching solution;
activating the substrate with a concentrated aqueous solution of ammonium bifluoride;
rinsing the substrate with a dilute aqueous solution of ammonium bifluoride; and
plating the substrate with a plating material.
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Abstract
Medical devices that include oxidizable portions can be plated after a two step activation process that includes successive applications of two aqueous solutions of ammonium bifluoride. Once plated, such materials can be soldered using conventional solders and fluxes. Medical devices can be assembled by soldering together plated materials. Oxidizable materials can be plated with radiopaque materials to yield medical devices that are more visible to fluoroscopy.
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Citations
42 Claims
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1. A method of plating a medical device, the medical device comprising an oxidizable substrate, the method comprising:
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cleaning the substrate with a cleaning and etching solution;
activating the substrate with a concentrated aqueous solution of ammonium bifluoride;
rinsing the substrate with a dilute aqueous solution of ammonium bifluoride; and
plating the substrate with a plating material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of forming a medical device comprising a first metal part and a second metal part, the first metal part comprising an oxidizable metal, the method comprising:
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cleaning the first metal part with a cleaning and etching solution;
activating the first metal part with a concentrated aqueous solution of ammonium bifluoride;
rinsing the first metal part with a dilute aqueous solution of ammonium bifluoride;
electroplating the first metal part; and
soldering said plated first metal part to said second metal part. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of forming a filter wire loop, the filter wire loop comprising a nitinol filter wire secured to a stainless steel wire, the filter wire having a first end and a second end, the method comprising steps of:
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cleaning each of the first and second ends with a cleaning and etching solution;
activating each of the first and second ends with a first aqueous solution comprising about 10 to 40 weight percent ammonium bifluoride;
rinsing each of the first and second ends with a second aqueous solution comprising about 1 to 10 weight percent ammonium bifluoride;
electroplating each of the first and second ends with a plating material comprising nickel;
positioning the plated first and second ends in alignment with the stainless steel wire and soldering the plated first and second ends of the filter wire to the stainless steel wire. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35)
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36. A method of making a medical device radiopaque, the medical device comprising an oxidizable substrate, the method comprising steps of:
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cleaning the substrate with a cleaning and etching solution;
activating the substrate with a first aqueous solution comprising about 10 to 40 weight percent ammonium bifluoride;
rinsing the substrate with a second aqueous solution comprising about 1 to 10 weight percent ammonium bifluoride; and
electroplating the substrate with a radiopaque material. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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Specification