As the cement viscosity increases over time, the pressure generated inside the syringe is simultaneously increased. The maximum pressure tolerated by the delivery gun can be controlled to perform the injection procedure progressively preventing rapid and massive delivery of cement into the vertebral body.
As soon as the pressure inside the syringe reaches the initial maximum pressure tolerated by the delivery gun, the automatic security mechanism is activated and the cement cannot be injected anymore.
Then the surgeon can increase the maximum pressure by turning “the crank” and the injection can continue with “the handle” until the security system is activated again.
The injection procedure is progressively carried out, adapting the delivery system to the bone cement viscosity.