Intervertebral fusion remote monitoring device

An invasive intervertebral fusion cage (10), said intervertebral fusion cage (10) comprising:

• a frame (13), configured to support surrounding tissues (20) used to create a bone fusion process upon a bone;
• at least one vibration sensor (11) located in an interior of a structure of the frame (13);
• a non-transitory computer-readable data carrier storing data acquired by the vibration sensor;
• a wireless interface for transmitting said stored data to an external device;
• and
• a sensor actuator,
• wherein the vibration sensor (11) is integral with the frame (13) and measures mechanical vibrations arising from a medium consisting of one or more of the frame (13), the surrounding tissues (20), and the bone subject to the bone fusion process,
• wherein the intervertebral fusion cage does not comprise a vibration excitation transducer,
• wherein the intervertebral fusion cage is configured to be placed in an initial position between two vertebrae (L1, L2),
• wherein the vibration sensor, in an activated state, emits mechanical or ultrasound waves, and
• wherein the sensor actuator is configured to activate the vibration sensor,
• the vibration sensor emitting said mechanical or ultrasound waves when activated by said sensor actuator,
• and the vibration sensor and the sensor actuator together form a control loop wherein information from the vibration sensor of the measured mechanical vibrations controls said sensor actuator in order for said sensor actuator to activate the vibration sensor for emission of the mechanical or ultrasound waves.