| 摘要 |
<p>A magnetically controlled valving system (12) for use with a pressurized drug storage chamber and delivery device (10) to permit administration of the stored drug at different flow rates. The valve includes a valving element (30) which is magnetically actuated between open and closed positions either by means of an external magnet or an implanted electromagnet (35). The valve may include magnetic biasing means (36, 37) to latch the valve element in either of its positions. The valve may be operated in either a manual or electronic mode. For safety, the electronic mode may be overridden by means of an external magnet. </p> |
