| 摘要 |
A hand-held power assister device is provided for injecting liquid, such as contrast media, into the vascular system of a mammal at a controlled rate from a syringe. The device comprises a pistol-shaped casing (10), a syringe (12) having a slideable piston (48) therein removably coupled to the casing (10) and drive means, (22,30,24,26) contained in the casing, for driving the piston in the syringe to deliver the liquid to the patient. The drive means preferably comprises a battery-powered motor (22) to generate angular rotation and a lead screw (30) rotatably coupled with the motor by gear means (24,26) to convert the angular rotation to linear motion, the screw (30) having at one end a female coupling means (38) for engaging with a male coupling means (46) on the piston (48). The use of the piston for the angiographic or urographic examination of a mammal is described. <IMAGE> |
