I'm feeling less sympathetic for Yamada. That said, Tachibana is the only one that deserves to be at a better hospital.
Also, while the standard protocol of rolling bariatric patients with no less than four people (a 500 pound patient requires about 6-8 lifters) is thrown out the window due to one being crushed and the other two being useless...you can get more success by using leverage. Instead of essentially deadlifting the patient (which will cause back injury), one can use their knees to brace on the ground at the hips, with a partner at the shoulders doing the same, and grab the patient's garments to roll them into the supine position...or at least the lateral or 3/4 prone position.
Ketoacidosis only comes after hyperglycemia, which in itself is a very gradual onset that takes place over the course of several days or even weeks. The fact that the patient's eating habits (along with underdosing on insulin) went unchecked for so long absolutely reeks of incompetence from the hospital staff.