**3.3 Medrobotics**

Flex robotic system (Medrobotics Corporation, US) has also two 4-mm articulating arm and endoscope (**Figure 9**). Unique feature is the snake-like endoscope [41–44]. By using two sets of shape-locking sheath, the endoscope can move follow-the-leader manner like snake. As the length of the endoscope is short, it can be applied for larynx, rectum from natural orifice, and percutaneously abdominal cavity. Flex robotic system has already cleared FDA for colorectal surgery.
