Capillaroscopic parameters | Normal pattern |
---|---|
Skin transparency and visibility | Capillaries are clearly visible |
Pericapillary edema | Absent |
Subpapillary venous plexus | Visible in > 30% of healthy individuals |
Capillary architecture | Capillaries perpendicular to the nail edge |
Capillary morphology | Inverted “U” shape |
Capillary loop diameter | < 20 μm |
Tortuosity | Normally absent |
Dilated and giant loops | Absent |
Neoangiogenesis | Absent |
Microhemorrhages | Normally absent |
Capillary density | 7 to 12 capillaries/mm |
Avascular areas | Absent |
Capillary blood flow | Dynamic, without stasis |