| 摘要 |
A subcutaneous portcatheter for injecting fluid into a patient through a catheter tube. The tube connects to a generally flat housing having a central chamber surrounded by an annular chamber containing a band filter. A soft needle-pierceable cover overlies the chambers. The central chamber connects to the annular chamber through a hole in the circular wall separating the two chambers, the hole being located diametrically opposite the outlet to the catheter tube. Fluid injected through the cover into the central chamber flows through the hole, through the filter, into the annular chamber outside the filter, exiting the housing through the outlet to the catheter tube.
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