| 摘要 |
An infusion device which permits transcutaneous access to an implanted catheter for use in introducing an external filament such as a optical fiber, external catheter, guide wire or rigid needle. In accordance with this invention the device includes a valve assembly (34) including a first valve element (36) defining an aperture (38) with a sealing member (40) which is normally to engage and seal against the aperture. The sealing element is made from a hard material such as a metal. Upon introduction of a rigid external introducer such as a needle, the needle directly contacts the sealing member plug (92) unsealing it from the valve element aperture which then closes against the external element. The device enables repeated access using a sharp introduced element such as a needle without it contacting soft sealing elements which could be degraded by such repeated access. <IMAGE> |
