Multi-frequency bioelectrical impedance analysis of skin rubor with two-electrode technique.

Background: Skin rubor, or reddish discoloration on skin, is a sign of irritation. Physiologically it involves temporary vasodilation and hyperaemia in tissue, and is diagnosed by the visible characteristics.

Purpose: Bioelectrical impedance analysis (BIA) was tested to estimate skin rubor.

Experimental study of decubitus ulcer formation in the rabbit ear lobe.

An animal model of decubitus ulcer was created with the use of ear lobes of Japanese white rabbits. When the strength of the cyclic compressions and the duration of the cycles of compression and release are adjusted, the model successfully reproduced the four grades used to characterize decubitus ulcer. Compressions were recorded with video microscopy to continuously monitor the changes in tissue blood flow, in both the compressed and surrounding regions.