Mesenterial bloodflow has been investigated routinely using colour Doppler ultrasound especially in patients with bowel disease. Examination protocols, however, differ considerably, because no standard technique has been established so far. Whereas there is agreement about the angle of ultrasonic application (< 60 degrees ), neither the exact location nor the relevant examination parameters have been standardized. Based on a search of the relevant literature, examination techniques and results were analysed. These findings are to serve as a basis for a prospective multi-center study for the determination of standard values.