As all skins are different and a thin skin needs less needle depth than thicker ones, we always
recommend going with your visual cue. Also, depending on the device you are using, or the therapist's pressure can be different, the desired endpoint is the most vital guide.
These numbers are only indicative, they can vary with every client and depends on individual skin type. Always go for the required end point (blood/no blood)
This is important as this is your visual cue, without this activity you would not be aware of which layer of the skin you are working on, we need a clinical endpoint. We have larger vessels in the hyperdermis. The dermal vessels are smaller in size and concentrated around the papillary dermis but there are far more of them. There are no vessels in the epidermis. For example, if we have targeted the hyperdermis, we would see a lot of blood.
If we target the papillary/reticular dermis the endpoint will be pinpoint bleeding. This is
a sign that you have successfully targeted the fibroblast and collagen induction. If we
treated the epidermis the endpoint would be no blood, but an inflammatory response. This
visual cue would be an erythemic response.
To clarify, if you are treating the epidermis and get blood, you are going too deep and
need to turn the device down. If you are treating into the dermis and don’t get any
blood, turn the device up. Vascular activity also depends on age, thickness of the skin,
sun damage and any previous treatments that they may have had.