| 摘要 |
In a medical guide wire (1), a helical spring (3) has a radiopaque portion defined on a front helical spring tube (31) of the helical spring (3). An elongation core (2) has a thinned portion at a distal end portion (21) and a thickened portion at a proximal end portion (22), and the distal end portion (21) of the elongation core (2) is placed within the helical spring (3), both the distal end portions of the helical spring (3) and the elongation core (2) are firmly fixed so that an outer surface of the helical spring (3) is covered by a synthetic coat (4). A flotage chamber (5) is provided in the radiopaque portion of the helical spring (3) to give a buoyancy to a distal end portion (12) which is liable to hang by its weight upon manipulating the guide wire (1) in the blood streams.
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