Two clarifications:
First, the medkit was in the elevator because they brought it there and probably just left it on the floor. So there was no compartment to extract it out from per say. That's a minor edit I can take care of myself, but I wanted to make sure everyone had the same mental picture on that.
Secondly, Tom - when shot - was close to the stairs. He staggered a step back, then being right on the edge of the spiral stairwell. And then he fell back, landed over the stairs and then unevenly slid down them until the nature of the circling spiral stairs stopped his descent. So, his body is kind of inclined diagonally, with his head down and his feet up. I'm not sure of how Yukari is propping him up.