This project investigates microcirculation in skin and muscle after different surgical treatment of pertrochanteric fractures of the femur for detecting the less damaging method. Three different systems are compared: the PCCT and the osteosynthesis with nails ( two minimal-invasive methods) and the conventional dynamic hip screw ( DHS). All three are long established and show no difference in results in any clinical trials. The method for every patient is chosen randomly.