| 摘要 |
A treatment wire (1) is provided for the delivery of a treatment to a site within the body that is composed of two stages. This treatment wire (1) includes a single wire drive portion (2) that is optimal for the proximal end of the treatment wire (1), and engages any storage and/or drive mechanism that may be used in storing and/or deploying the treatment wire (1). The single drive wire (2) is ground at its distal end (4) to a smaller diameter and encased within a tube (6) forming the second stage of the treatment wire (1). Because the drive wire (2) terminates proximally to the tube (6), a cavity (7) is formed that can retain the treating substance to be delivered to the patient. Shape memory/super-elastic material is preferably used for the construction of the treatment wire (1). When such material is used, the distal end (4) of the treatment wire (1) can be heat treated in order to render it more ductile and, therefore, more desirable for use in the tortuous passageways of the body.
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