| 摘要 |
<p>This invention is a flexible and kink proof intra-cavity delivery catheter (10) for precise placement and injection of therapeutic agents into and/or through the wall of a body cavity at a precise treatment site with even distribution throughout. One or more needle assemblies (24) are disposed around a calibrated balloon (28) which, when inflated, brings each needle assembly (24) into contact with and enables the piercing of the cavity wall to a calibrated depth. Each needle assembly (24) consists of a plurality of tissue insertion needles along the longitudinal axis of the needle assembly (24). Precise amounts of the therapeutic agent are then quickly delivered through the needle assembly (24) directly into the diseased body tissue. When the calibrated balloon (28) is deflated retraction members (26) pull the needle assemblies (24) back into the catheter body for catheter (10) repositioning or catheter withdrawal.</p> |
