A Blood vessel catheter-accessed positive pressure impulse vessel-rinsing syringe, comprising an injection tube (1) the injection tube (1) is provided with a first end (9) and a second end (10) the first end (9) of the injection tube (1) is provided with an injection exit (2). The injection tube (1) is provided with at least one cavity therein the cavity communicates with the injection exit (2) a matched piston device is disposed in the cavity of the injection tube (1) the piston device comprises a piston body (18) and a piston push rod (6) connected with the piston body (18) one end of the piston push rod (6) is connected to the piston body (18), and the other end penetrates through the second end (10) of the injection tube (1), and pushes the piston body (18) via the piston push rod (6) to move in the cavity of the injection tube (1) a first barrier is disposed on the inner wall of the injection tube (1) the first barrier is in the injection tube (1) and at the second end adjacent to the injection tube (1) a second barrier is disposed on the piston push rod (6) of the piston device the second barrier is fitted with the first barrier and when the piston push rod (6) pushes the piston body (18) to move in the cavity of the injection tube (1), the liquid in the injection tube (1) can be jetted out from the injection exit (2) by impulse.Linvention concerne une seringue de rinçage de vaisseau à impulsion de pression positive, accessible par cathéter pour vaisseau sanguin, qui comprend un tube (1) dinjection le tube (1) dinjection est doté dune première extrémité (9) et dune seconde extrémité (10) la première extrémité (9) du tube (1) dinjection est dotée dune sortie (2) dinjection. Le tube (1) dinjection est doté dau moins une cavité en son sein la cavité communique avec la sortie (2) dinjection un dispositif de piston correspondant est disposé dans la cavité du tube (1) dinjection le dispositif de piston comprend un corps (18) de piston et une tige (6) de poussée de p
