Did I do the right thing?

A student cut himself in the shower at my school. He was bleeding a lot and the wound required a pressure dressing to get the bleeding to stop. I called the mother to take the student for medical care, which she promptly did. The cut was quite deep and required quite a few stitches. I am now being complained about because I did not clean the wound. It happened in the shower, so it wasn't like there was debris in it and I felt it was well cleaned with the large amount of bleeding. I explained to the parent that I did not want to cause even more tissue damage by cleaning it with H2O2 or even soap and water. I was sending the student to a medical facility where he would receive stitches and any special dressing they felt necessary. Was I wrong?