KLM is Dutch, I believe. It sounds like their requirements were different from Delta's for loading, and more importantly, for safety. Older planes are not designed for morbidly obese people. The seats are one issue--- getting her down the aisle would be another, especially with only one leg. Their wheelchairs are designed to fit through the aisle, so if she couldn't get into one of those, she could not be moved to her seat. They should have driven or taken the train to somewhere with different planes. Or, looked for a dialysis clinic. By the way, once you hit 300 lbs, almost NOTHING in medicine works like it should.