| 摘要 |
An insertion sleeve (1) of a medical insertion instrument, with which a catheter or balloon catheter (2) can be introduced from the outside into a blood vessel and can be moved through the blood vessel to a position to be treated and after treatment can be retracted back through the fluid-tight insertion sleeve (1). The insertion sleeve (1) is expandable over its entire effective length due to one or more breaks, for example, a continuous slit (9), in the inner wall, and furthermore it is also fluid-tight in the expanded state due to a fluid-tight, expandable casing (7) whose extent can be increased due to its elasticity and/or one or more folds (11) existing in the casing corresponding to the widening of the insertion sleeve (1).
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