Patent ID: 8753314

Claim:
A neurosurgery injection delivery system for automatically injecting fluid into an injection site, comprising: at least one support element; a carriage moveably mounted to the at least one support element so that the carriage can move linearly relative to the at least one support element; a motorized carriage actuator operable to cause incremental linear movement of the carriage relative to the at least one support element; a syringe assembly carried by the carriage so as to move with the carriage, the syringe assembly comprising: a syringe barrel defining an interior volume for receiving a fluid; a cannula in fluid communication with the syringe barrel, the cannula being positioned parallel to the direction of linear movement of the carriage; the cannula being rotatable relative to the carriage; and a plunger slidably received within the syringe barrel; a motorized plunger actuator carried by the carriage so as to move with the carriage, the plunger actuator being operably coupled to the plunger for causing incremental linear movement of the plunger within the syringe barrel; a motorized rotation actuator carried by the carriage and operable for causing incremental rotation of the cannula relative to the carriage without causing linear movement of the cannula; and an electronic controller for controlling the carriage actuator, the plunger actuator and the rotation actuator according to instructions stored on a computer readable medium; wherein the electronic controller cooperates with the carriage actuator, the plunger actuator and the rotation actuator to deliver fluid with: delivery accuracy: about +/−0.1 microliters (100 nanoliters); volume feedback accuracy: about 50 nanoliters; position accuracy: about 50 micrometers; and position feedback accuracy: about 50 nanometers.