| 摘要 |
A splittable cannula including a radiopaque marker. Generally, the marker is placed at or near the distal end of the cannula. The radiopaque marker may be a unitary piece, or may consist of several portions. The sheath may include a sheath body having at least one sheath score line running along a portion of the sheath body, a radiopaque marker located at a distal end of the sheath body and abutting the sheath body, and at least one score line running along a portion of the radiopaque marker. The radiopaque marker may be located within the lumen of the sheath, or may be embedded in the sheath wall. Alternative embodiments may replace the marker score line with a notch or groove running along the length of the radiopaque marker. The notches, grooves, and/or score lines in both the sheath body and radiopaque marker serve to provide a weakened tear path.
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