| 摘要 |
An injection needle ( 1 ) particularly adapted for sclerotherapy is disclosed, comprising a cannula ( 2 ) with mainly longitudinal development defining a main axis (X), a duct ( 4 ) for passage of a sclerosing substance (L) to be injected into a vein (V) being defined inside said cannula. The duct ( 4 ) has at the lower end ( 2 a) an inlet ( 5 ) for the sclerosing substance (L) and an outlet ( 6 ) for the sclerosing substance (L) at the upper end ( 2 b). At lest a constriction ( 7 ) is provided inside the duct ( 4 ), one or more through holes ( 8, 9 ) made in the wall of the cannula ( 2 ) being provided upstream the constriction according to the direction of advancement of the sclerosing substance (L) along the duct ( 4 ).
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