The phrase “robotic surgery” can create the impression that a machine is independently carrying out an operation. That is not how current commercial systems work.

The FDA is explicit: robotic-assisted surgical devices remain under direct human control. The surgeon operates from a console, viewing the surgical field and controlling the movements of the instruments attached to the robotic arms. The robot may translate, scale or refine those movements, but it cannot perform the procedure without the surgeon.

That distinction matters. The surgeon is still making the decisions, applying clinical judgement and responding to anatomy in real time. But those decisions are transmitted through a complex chain of digital and mechanical technology before they reach the tissue. Every link in that chain has to behave as intended.

A control input may be translated into movement through multiple joints and interfaces before reaching the end of a wristed instrument. Intuitive’s EndoWrist instruments, for example, offer seven degrees of freedom, while systems such as Versius use small, fully wristed instruments intended to provide dexterity and accuracy within minimally invasive procedures.

The more articulation, control and functionality an instrument provides, the more carefully its constituent parts must work together.