I had cola coloured urine and dark, what looked to be black rings or blobs in my urine after the last general anesthesia I had had. It is on this basis that I am registered as MH susceptible. Other signs included muscle weakness and optic nerve damage. Apparently PCO2 was 42. I am surprised that so much could happen in such a short time the total time for surgery was 15 min.
Myoglobinuria is a urine containing myoglobine.
Myoglobin is a component of skeletal muscle and looks reddish in color. This is the reason why many indicate it cola coloured urine when it appears in urine. This is a proof that skeletal muscle is destroyed. Muscle weakness may appear when destruction of muscle is in a great extent. The value of 42 mmHg in PCO2 is normal.