Catheter arrangement (10) comprises a first attachment (14) having a housing with an outer surface and an inner surface, a tube (12) arranged on the first attachment, a second attachment having a housing with an outer surface and an inner surface, a needle (16) having a tip (72) arranged on the second attachment and protruding into the tube, a valve, a valve opener and a stripper with a periphery that delimits an opening and the needle. Preferred Features: The arrangement further comprises a tip protection unit arranged in the inner hollow chamber (24) of the first attachment. The stripper is arranged on the valve opener.
