| 摘要 |
A guide catheter (110) for use in treatment of the right main coronary artery of a cardiovascular system includes a hollow, flexible tubular body (112). The tubular body (112) has a proximal, generally straight portion (114) and a distal, generally curvaceous portion (116) having a distal end (143). The distal portion (116) of the tubular body (112) has a primary curve (140) proximal the distal end (143) and a secondary curve (146) proximal the primary curve (140). The primary and secondary curves (140, 146) are defined by preshaped, consecutively arranged obtuse angled segments of the tubular body (112). The distal portion (116) also has a tertiary curve (123) proximal the secondary curve (146), and the tertiary curve (123) is defined by a preshaped, oppositely disposed arched extent of the tubular body (112) long enough to cause the distal portion (116) to overlie itself in its preformed configuration prior to use. The curves (140, 146, 123) of the distal portion (116) are preformed and aligned so that in use, after the guide catheter (110) has been advanced through the descending aorta, over the aortic arch, and into the ascending aorta to a position where the distal end (143) is generally coaxially aligned within the ostium of the right main coronary artery, the distal portion (116) of the guide catheter (110) engages the wall of the ascending aorta and engages the wall of the aortic arch. |
