Abstract: An endoscopic vein harvesting system may include an endoscope including a proximal end having one or more of a collar or a handle and including a distal end. The system may include a component formed from a transparent material and configured to couple to the distal end of the endoscope. The system may include one or more visual indicators formed on or within a selected portion of the component. In some implementations, the one or more visual indicators may assist a harvester to determine a position of the component relative to a vein to be harvested.

Abstract: A device may include a light source, an interface, and a microcontroller unit (MCU). The light source may emit light toward a treatment surface to produce an optical indicator. The interface may be configured to receive input data to change a status of a time out procedure. The MCU may be coupled to the light source and the interface. The MCU may be configured to receive first input data from the interface and control the light source to produce a first optical indicator including one or more first parameters in response to the first input data; receive second input data and control the light source to produce a second optical indicator including one or more second parameters in response to the second input data; and receive third input data and turn off the light source in response to the third input data.