Method of making active embolic coil
First Claim
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1. A method of applying a polymeric coating to at least one embolic coil, which comprises:
- passing one end of the embolic coil through an aperture in a spreading member to straighten the coil;
attaching said one end of the embolic coil to an upper holder positioned above said spreading member, the embolic coil portion that extends from the upper holder to said aperture being generally vertical and straight;
applying to said embolic coil a dispersion of a polymeric coating formulation in a solvent, while passing portions of said embolic coil which are below said spreading member through said spreading member, to cause substantially the entire embolic coil to be vertical and straight;
removing the spreading member and the upper holder while in fixed position relative to each other and removing the embolic coil from further contact with said coating formulation; and
drying said embolic coil.
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Abstract
A polymeric coating is applied to at least one embolic coil carried in a fixture, at least a portion of said embolic coil being generally vertical and straight. The coil is carried in the fixture during the processing, and may remain in the fixture if desired for further steps of processing.
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Citations
18 Claims
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1. A method of applying a polymeric coating to at least one embolic coil, which comprises:
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passing one end of the embolic coil through an aperture in a spreading member to straighten the coil;
attaching said one end of the embolic coil to an upper holder positioned above said spreading member, the embolic coil portion that extends from the upper holder to said aperture being generally vertical and straight;
applying to said embolic coil a dispersion of a polymeric coating formulation in a solvent, while passing portions of said embolic coil which are below said spreading member through said spreading member, to cause substantially the entire embolic coil to be vertical and straight;
removing the spreading member and the upper holder while in fixed position relative to each other and removing the embolic coil from further contact with said coating formulation; and
drying said embolic coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of applying a polymeric coating to a plurality of embolic coils, which comprises the steps of:
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attaching the embolic coils to a fixture for supporting and mounting said coils with at least a portion of each of the coils positioned vertically and straight;
applying a dispersion of a polymeric coating formulation in a solvent to said coils;
removing the fixture and the plurality of embolic coils from said polymeric coating formulation while at least a major portion of said coils are vertical and straight; and
drying the embolic coils prior to removal from the fixture. - View Dependent Claims (16, 17, 18)
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Specification