One idea to enhance under-qualified crew who might need to perform an advanced surgery, is to have a robotic surgery machine on Mars which would be operated by a crew-member with help via telecommunications from Earth.[32] Two examples of medical-care situations that been mentioned in regard to people on Mars is how to deal with a broken leg and an appendicitis.[32] One concern is to stop what would otherwise be a minor injury becoming life-threatening due to restrictions on the amount of medical equipment, training, and the time-delay in communication with Earth.[33] The time delay for a one way message ranges from 4 to 24 minutes, depending.[34] A response to a message takes that time, the delay processing the message and creating a reply, plus the time for that message to travel to Mars (another 4 to 24 minutes).[34]