The present invention provides a linear slide indicator used in connection with a medical device to indicate radial expansion or linear translation of a component within the device. The medical instrument includes a shaft, a handle, an end effector and a linear slide indicator. The shaft extends along a shaft axis and is configured to travel linearly along the shaft axis. The handle is configured to be attached to a proximal end of the shaft and to rotate around the shaft axis. The end effector is configured to be attached to a distal end of the shaft and to travel linearly with the shaft along the shaft axis via the rotational motion of the handle. The linear slide indicator is configured to indicate a magnified value of an actual traveled linear distance of the end effector.
