An employee was performing maintenance on lab test area doors that move up and down to allow units on a conveyor belt to enter. A unit was on the conveyor and got stuck under the door when the door closed on top of it. The employee used a pipe to pry the unit loose and push it out from under the door. When the unit moved, the door shut and slammed the pipe down onto the employee's right index finger, resulting in an amputation through the middle phalanx.