thanks for the diagram Marie, that's really helpful!! We do have a similar set up for arthroplastys which is reassuring!! It is always a bit of a nightmare keeping all the sterile instruments within the laminar flow (ventilation tent) though!!! I think the surgeon in question in this instance felt that the scrub nurse should be behind the trolley with the instruments in front of her rather than with them to one side. He was referring particularly to minor cases where only one trolley is used for the operation. Where would you put that one trolley??!!