Administration tip for a flexible bag for medical use

Abstract

A perfusion tip for a flexible bag for medical use includes a tube formed in two tubular coaxial parts separated by a transverse pierceable membrane. The tube is provided on its external periphery with an annular projection delimiting an upstream tip portion adapted to be introduced in and fixed to by welding a portion secured to the flexible bag to be equipped, and a downstream tip portion adapted to receive a perfusion line. The tube also includes a ring engaged within the upstream portion and adapted, because of its hardness, to serve as a mandrel during production of the weld between the periphery of the upstream portion and the portion of the bag in which this upstream portion has been introduced, and a cover that caps the downstream portion and is adapted to ensure maintenance of the sterility of the tube while permitting access thereto.

1 . Perfusion tip for flexible bags for medical use, of the type comprising a tube ( 2 ) formed in two coaxial tubular portions separated by a pierceable transverse membrane ( 5 ), characterized in that said tube ( 2 ) is provided on is external periphery with an annular projection ( 9 ), continuous or not, delimiting an upstream tube portion ( 10 ) adapted to be introduced and fixed by welding in a portion secured to the flexible bag to be equipped, and a downstream tip portion ( 14 ) adapted to receive a perfusion line, and in that it comprises moreover, on the one hand, a ring ( 4 ) engaged within said upstream portion ( 10 ) and adapted, because of its hardness, to serve as a mandrel during the execution of said welding between the periphery of the upstream portion and the portion of the bag in which this upstream portion has been introduced, and on the other hand, by a cover ( 3 ) that cps said downstream portion ( 14 ) and is adapted to ensure the maintenance of sterility of the tube ( 2 ) whilst permitting access to this latter.  
   
   
       2 . Perfusion tip according to  claim 1 , characterized in that the tubular end of the downstream portion ( 14 ) of the tube ( 2 ) has a diameter and a thickness which decreases outwardly so as to give to this end resilience during emplacement of a perfusion line and to ensure good sealing to the trocar of the perfusion line.  
   
   
       3 . Perfusion tip according to  claim 1 , characterized in that said cover ( 3 ) capping the downstream portion ( 14 ) of the tube ( 2 ) is constituted by a tubular portion surrounding said downstream portion ( 14 ) prolonged by a portion ( 15 ) connected to said tubular portion by a region of lesser resistance ( 16 ), which can be broken to give access to the tube.  
   
   
       4 . Perfusion tip according to  claim 1 , characterized in that said ring ( 4 ) connected to the interior of said downstream portion ( 10 ) of the tube comprises an internal end ( 18 ) slightly less in diameter and thickness and an opposite end provided with a retaining projection ( 19 ).  
   
   
       5 . Perfusion tip according to  claim 1 , characterized in that the tube ( 2 ), the cover ( 3 ) and the ring ( 4 ) are made respectively from flexible polypropylene, rigid and frangible polypropylene, and rigid polypropylene.