Patent ID: 7566321

Claim:
A device for the injection of medical preparations into a patients body ( 35 ) during an examination in a Computer Tomograph (CT) or in a Magnetic Resonance Tomograph (MRT) or endoscopically, said device including an injection-needle, advancing arrangement, an injection needle ( 1 ) supported by said injection-needle advancing arrangement for inserting the injection needle ( 1 ) into the body of the patient ( 35 ) and the concurrent injection of a medical preparation, a separate dosing apparatus ( 6 ) for the storing and sensor controlled transport of the medical preparations, said dosing apparatus ( 6 ) including an exchanger magazine ( 7 ) for removably accommodating several one-way syringes ( 5 ), each including a piston ( 10 ), a syringe carrier ( 17 ) connected to each syringe and a drive ( 9 ) with an electric motor ( 15 ) and a worm drive ( 16 ) connected to each syringe carrier ( 17 ) for independently operating the syringes ( 5 ), a separate hose ( 4 ) extending from each syringe ( 5 ) and being connected to a mixing chamber ( 36 ) which is common to all syringes ( 5 ) and the hoses ( 4 ), each hose including a check valve ( 3 ) arranged shortly ahead of the connection to the mixing chamber ( 36 ) for the one-way transport of the medical preparations from the dosing apparatus ( 6 ) to the injection needle ( 1 ) and a pressure sensor ( 2 ) in communication with each syringe ( 5 ) for monitoring the supply of the medical preparations from the dosing apparatus ( 6 ) to the injection needle ( 1 ), said injection needle advancing arrangement comprising a needle guide structure, an injection needle holder ( 13 ) and an operable linear drive ( 14 ) for the movement of the injection needle holder ( 13 ) in parallel with the injection needle ( 1 ), said injection needle holder linear drive ( 14 ) and said dosing apparatus ( 6 ) and also the drives ( 9 ) thereof having dimensions and consisting of materials permitting the introduction thereof into the CT or MRT and being operative therein, the needle holder ( 13 ) is for engaging the needle so as to move the needle ( 1 ) together with the needle holder and for releasing the needle so as to move the needle holder without moving the needle for repositioning the holder on the needle.