| 摘要 |
<p>A synthetic fiber is formed with a plurality of longitudinally-extending cavities (16, 54 and 64) which hold a medicament that is intended to be absorbed into tissue brought into contact with the fiber. The fiber can be formed by dissolving a soluble polymer component (14) of an extruded plural-component fiber (10), leaving cavities (16), that extend inward from the outer surface of the fiber in the locations of the dissolved polymer. After the fiber has been exposed to a solvent, the cavities left by the dissolved component are filled with a medicament (18). Specifically, the cavities are filled with a medicament that is mixed with a viscous carrier which solidifies within the cavities. The fibers can be used to make sutures, textile prostheses for insertion into the body, and epidermal pads and bandages. Fibers having internal cavities (64), i.e., cavities not extending to the external surface of the fiber, can be formed by extruding a single-component fiber (60) from a spinneret orifice (72) having a number of T-shaped slots extending from a central hub. A medicament is introduced into the internal cavities by soaking the fiber in a liquid containing the medicament. The internal-cavity fiber is therefore formed of polymer having some capability for liquid transport, e.g., nylon.</p> |
