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Oxygen partial pressure in outer layers of skin: simulation using three-dimensional multilayered models.
1Medical Engineering Division, Department of Engineering, Queen Mary University of London, London, UK. wen.wang@qmul.ac.uk
Microcirculation (New York, N.Y. : 1994)
|April 13, 2005
Summary
The subpapillary plexus is the primary source of oxygen for the skin, supplying over 60%. Papillary loops contribute about a quarter, while air diffusion provides minimal oxygen to the epidermis.
Area of Science:
- Dermatology
- Physiology
- Biophysics
Background:
- Papillary loops in dermal papillae are hypothesized to enhance oxygen delivery to the epidermis.
- Understanding oxygen distribution is crucial for skin health and function.
Purpose of the Study:
- To simulate oxygen partial pressure (pO2) distribution in superficial skin layers.
- To quantify oxygen supply from various sources, including papillary loops and the subpapillary plexus.
Main Methods:
- Developed a theoretical model incorporating heterogeneous tissue properties based on skin anatomy.
- Numerically solved for pO2 distribution in tissues and blood.
- Investigated the impact of blood flow rate and skin surface conditions.
Main Results:
- The subpapillary plexus supplied over 60% of oxygen to the upper skin.
- Papillary loops contributed approximately 25% of the oxygen consumed.
- Oxygen diffusion from air was limited to superficial epidermal regions, accounting for about 10% of uptake.
Conclusions:
- Papillary loops are vital for delivering oxygen from circulation to the germinal layer.
- Papillary loop blood flow rate influences pO2 within dermal papillae.
- Epidermal pO2 is significantly affected by skin surface conditions.