| 主权项 |
1. Using an injector head including a first plunger adapted to be movable forward and backward and a second plunger adapted to be movable forward and backward,
said injector head being provided with a first syringe including a first piston detachably coupled to said first plunger and a second syringe including a second piston detachably coupled to said second plunger, said first syringe having a first through hole provided at a front end side, said second syringe having a second through hole provided at a front end side, and in a state where a first tube is coupled to said first through hole and a second tube is coupled to said second through hole, a priming method conducted when a contrast agent is introduced to said first syringe and a contrast agent is introduced to said second syringe by said injector head; wherein a first T-shaped tube is coupled to the other end of said first tube; said first T-shaped tube is coupled to one end of each of a third tube and a fifth tube; a second T-shaped tube is coupled to the other end of said second tube; said second T-shaped tube is coupled to one end of each of a fourth tube and a sixth tube; a third T-shaped tube is coupled to the other end of each of said third tube and said fourth tube; to said third T-shaped tube, a seventh tube having the other end coupled to a bag of said contrast agent is coupled; a fourth T-shaped tube is coupled to the other end of each of said fifth tube and said sixth tube; to said fourth T-shaped tube, a coupling tube having the other end coupled to a connector is coupled; a first flow path switching mechanism for switching opening/dosing of said third tube and said fifth tube arranged parallel to each other, and a second flow path switching mechanism for switching opening/dosing of said fourth tube and said sixth tube arranged parallel to each other are provided; said first flow path switching mechanism has a first change-over valve element arranged between said third tube and said fifth tube and movable in a direction intersecting a direction of extension of said third tube and said fifth tube; said first flow path switching mechanism has a first fixed valve element at a position opposite to said first change-over valve element with said third tube interposed, and a second fixed valve element at a position opposite to said first change-over valve element with said fifth tube interposed; said second flow path switching mechanism has a second change-over valve element arranged between said fourth tube and said sixth tube and movable in a direction intersecting a direction of extension of said fourth tube and said sixth tube; said second flow path switching mechanism has a third fixed valve element at a position opposite to said second change-over valve element with said fourth tube interposed, and a fourth fixed valve element at a position opposite to said second change-over valve element with said sixth tube interposed; said priming method comprising the steps of: a first step of tilting said injector head and thereby tilting said first syringe and said second syringe to have said first through hole positioned upper than said first piston and said second through hole positioned upper than said second piston; a second step, following the first step, of moving said first change-over valve element to the side of said first fixed valve element to close said third tube and moving said second change-over valve element to the side of said third fixed valve element to close said fourth tube and, in this state, moving said first piston in said first syringe to the foremost position to discharge air in said first syringe to the outside and moving said second piston in said second syringe to the foremost position to discharge air in said second syringe to the outside; a third step, following the second step, of moving said second change-over valve element of said second flow path switching mechanism to the side of said fourth fixed valve element to open said fourth tube and to close said sixth tube and, in this state, with a contrast agent bag containing said contrast agent coupled to said second tube, moving said second piston in said second syringe backward to introduce a prescribed amount of said contrast agent from said contrast agent bag to said second syringe; a fourth step, following the third step, of moving said second change-over valve element to the side of said third fixed valve element to close said fourth tube and moving said first change-over valve element to the side of said second fixed valve element to close said fifth tube and, in this state, moving said second piston in said second syringe backward to introduce a prescribed amount of air to said second syringe; a fifth step, following the fourth step, of moving said first change-over valve element to the side of said first fixed valve element to close said third tube and, in this state, moving said second piston in said second syringe forward to discharge air in said second syringe to the outside and filling said second tube with said contrast agent; a sixth step, following the fifth step, of moving said first change-over valve element of said first flow path switching mechanism to the side of said second fixed valve element to open said third tube and to close said fifth tube and, in this state, moving said first piston in said first syringe backward to introduce a prescribed amount of said contrast agent from said contrast agent bag to said first syringe; a seventh step, following the sixth step, of moving said first change-over valve element to the side of said first fixed valve element to close said third tube and, in this state, moving said second piston in said second syringe backward to introduce a prescribed amount of air to said second syringe; and an eighth step, following the seventh step, of moving said second change-over valve element to the side of said fourth fixed valve element to close said sixth tube, and in this state, moving said second piston in said second syringe backward to introduce said contrast agent to said second syringe and, with said first tube being kept open, moving said second piston in said second syringe forward to discharge air in said second syringe to the outside and filling said first tube with said contrast agent. |
