| 摘要 |
PURPOSE:To keep the sterilized state of a physiological solution without touching a pressurizing part by directly pressurizing a soft container, which receives a physiological saline solution supplied to an operating handpiece, within a cylinder by a piston. CONSTITUTION:The liquid outlet part 4 of a container 1 having a physiological saline solution received therein is connected to a handpiece 2 through a high pressure hose 17 and a servo motor 11 is driven to move a ball screw 8 along a guide shaft 10 to allow a piston 7 to advance. Since the total outer peripheral part of the container 1 is closely surrounded by the inner wall of a cylinder 6 and an elastomer 20, the physiological saline solution in the container 1 is pressurized to be injected from the handpiece 2 and the container 1 gradually contracts as the physiological saline solution is consumed. At the time of pressurization, the pressure of the physiological saline solution is detected by a pressure detector 8 to control the rotational speed of the servo motor 11 and the pressure of the injected physiological saline solution can be always held to predetermined value. |
