(US)

• Main Author: HILLSTEAD RICHARD A
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2004
• Edition: 7
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ELECTROTHERAPY; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; MAGNETOTHERAPY; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; RADIATION THERAPY; TREATMENT OR PROTECTION OF EYES OR EARS; ULTRASOUND THERAPY

一种将治疗单元通过导管送到患者管腔内通道中所要求部位的装置，以抑制瘢痕组织的形成，例如气囊血管成形术之后出现的再狭窄中的瘢痕。该装置包括有长形柔性导管，该导管有近端和远端部分，以及两端之间的管腔，导管直径小到足以穿引入患者管腔内通道中；一个或多个治疗单元，例如装有放射性材料的胶囊或丸粒，可以安置在管腔中，并在流经管腔的流体推动力作用下，在近、远端部分之间移动。 Apparatus and method are described for delivery of a treating element, such as a radiation source, through a catheter to a desired site in the intraluminal passageways of a patient, such as a coronary artery, for inhibiting the formation of scar tissue such as may occur in restenosis following balloon angioplasty. The apparatus includes an elongated flexible catheter tube having proximal and distal end portions, with a lumen extending therebetween, and a diameter sufficiently small for insertion in to a patient's intraluminal passageways. One or more treating elements, such as a capsule or pellet containing radioactive material, is positionable within the lumen and movable between the proximal and distal end portions under the force of liquid flowing through the lumen. A method for using such apparatus, including a method for using such apparatus simultaneously with a balloon angioplasty procedure, is disclosed.