Medical injection systems and methods related to user activated control devices

A method for controlling a medical injection system, the method comprising:

• sensing an internal pressure of a compressible internal volume of a control device, the control device being coupled to the system, the internal pressure being greater than a baseline pressure, and the internal pressure being in response to an external force applied to the volume of the control device by an operator of the system;
• generating an injection control signal based upon the internal pressure;
• continuing to sense the internal pressure of the control device after release of the applied external force;
• and
• generating a notification, if the sensed internal pressure drops below the baseline pressure after the release of the applied external force.

A method for controlling a medical injection system, the method comprising:

• applying an external force to a compressible internal volume of a control device, the control device being coupled to the injection system, the external force increasing an internal pressure of the volume from a baseline pressure, and the internal pressure being sensed to generate an injection control signal based upon the internal pressure;
• releasing the applied external force;
• and
• monitoring the sensed internal pressure after releasing the applied external force.

A medical injection system comprising a pump, an injection control module, and a user activated control device coupled to the control module;

• the control device including an internal volume compressible by application of an external force;
• the control module comprising a pressure sensor in fluid communication with the internal volume of the control device;
• and the control module being configured to perform a method comprising the steps of:
• sensing an internal pressure of the internal volume of the control device, the internal pressure being greater than a baseline internal pressure, and the internal pressure being in response to the application of an external force that compresses the internal volume;
• generating an injection control signal based upon the internal pressure;
• continuing to sense the internal pressure of the control device after release of the application of the external force;
• and
• generating a notification, if the sensed internal pressure drops below the baseline pressure, after the release of the application of the external force.