Design of a Knob Actuator for Transesophageal Echocardiographic Probe

This abstract presents the design and development of a knob actuator for a transesophageal echocardiographic (TEE) probe, aimed at improving ergonomic use and reducing exposure to ionizing radiation in clinical settings. The proposed actuator allows remote control of the TEE probe’s bending in ante/retro (AR) and right/left (RL) directions while maintaining manual usability and ensuring ease of sterilization. The mechanical design features a spur gear mechanism that transmits torque from motors to the probe's control knobs, enabling precise and reliable actuation. The system is controlled via an Arduino-based setup with potentiometers that replicate manual knob movements. Workspace characterization experiments demonstrate effective bending control. The results highlight the system’s potential to enhance safety and usability in echocardiographic procedures.