| 摘要 |
A guide wire ( 1 ) for use with a catheter for accessing a remote site in the venal or other system of the body of a human or animal subject comprises a core wire ( 2 ) extending from a proximal end ( 5 ) to a distal end ( 6 ). The core wire ( 2 ) terminates at the distal end ( 6 ) in a distal portion ( 16 ) which is of rectangular transverse cross-section defining a pair of opposite major surfaces ( 18,19 ) and minor surfaces ( 20,21 ). The distal portion ( 16 ) also defines a central major plane ( 24 ) which lies between the major surfaces ( 18,19 ) and bisects the minor surfaces ( 20,21 ), and a central minor plane ( 25 ) which lies between the minor surfaces ( 20,21 ) and bisects the major surfaces ( 18,19 ). An alignment portion ( 27 ) for aligning the distal end ( 6 ) with a branched vessel of the vascular system is formed in the distal portion ( 16 ) by bending the distal portion ( 16 ) in the central major plane 24 to form a curved portion ( 28 ) from which the alignment portion ( 27 ) extends, the curved portion 28 and the alignment portion 27 lying in the central minor plane 24. By bending the distal portion ( 16 ) in its central major plane, the column strength of the guide wire ( 1 ) is such as to minimise the danger of buckling of the distal portion in the central minor plane ( 25 ).
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