| 摘要 |
<p>The device is intended for removing a deposit (B) partially or completely obstructing a vessel (A), for example an artery, in the human body by means of a supersonic jet (C). This device consists of a catheter comprising a flexible tube (10) intended for introduction into the obstructed vessel, and of a flexible metal duct (11) extending in this tube (10), equipped at one end with a nozzle (13) intended to be brought into proximity with the deposit (B) and connected at its other end to a source of liquid under pressure (12). The orifice (22) of the nozzle (13) is between 20 and 70 in diameter and the pressure of the liquid in the nozzle (13) is at least 6 x 10<7> Pa, so that the jet (C) enters the liquid contained in the vessel (A) at a speed of at least 300 m/s. <IMAGE></p> |
