Given the nature of work being meted out by medical practitioners, the work needs to be completed on time. Matters always arising refer to medical emergencies. And even if a medical practitioner was not called on to deal with an emergency, he is still dealing with day to day diagnostic and surgical tasks that require him to have all his instruments working optimally. There can be no breakdown in the middle of a procedure. But should there ever be a need to send instruments away to surgical instrument repair companies for repairs, maintenance and regular servicing, then the medical practitioner, and with the input and co-operation of his regular service provider, should have backup instruments at the ready.
Not should, but usually does. Qualified medical practitioners are highly responsible individuals and, so, due to the nature of their work, they need to be. Part of the responsibilities of their day to day medical work require them to be as organized as possible. In this line there can be no margin for error. While qualified, experienced and responsible practitioners have to, strictly speaking, contend with life and death matters on a daily basis, it is well within their capabilities to work well under pressure.
The skilled and certified technicians that service their medical equipment from time to time also need to be highly responsible individuals, well-organized and good at keeping to schedules, as well as being capable of working under pressure. It is interesting to note that technicians are entering the specialized surgical and diagnostic medical equipment trade from other professional areas. This could be put down to the fact that the equipment on their lab tables in their workshops have or share similar characteristics, instruments with attached camera equipment being a good example.