| 摘要 |
The catheter ( 1 ) according to the invention comprises a retractable end tool ( 9 ) with a needle ( 12 ) in the form of a slide ( 10 ) that is integral with a needle base ( 11 ) or that pushes this needle under the effect of a continuous or pulsed pressurized fluid. An elastic retraction force, preferably exerted by a spring ( 21 ) positioned between the needle-bearing base ( 11 ) and the frontal end wall ( 6 ) of the catheter, retracts the slide-needle unit to its retracted resting position. This invention is of interest to manufacturers and users of catheters for surgical, therapeutic or diagnostic use.
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