In order to ensure a valid clinical functional evaluation of peripheral isc
haemia in diabetic patients with arterial occlusive disease we have to cons
ider special pathophysiological features. In view of the limited reliabilit
y of standardized Doppler ankle pressure measurements our investigations ai
med at evaluation the value of alternative diagnostic possibilities. By mea
ns of metatarsal Doppler waveform analysis, photoplethysmographic toe press
ure measurements and transcutaneous pO(2)-determinations the severity of pe
ripheral ischaemia in diabetic patients could be quantified. Based on a ini
tial thorough physical examination there is a need for these measurements i
n order to evaluate the ischaemic component of the diabetic foot syndrome a
nd recognize the critical limb ischaemia.