PRP, microneedling and combination “vampire” treatments are among the most popular services in aesthetics. They are also the ones where the real risk is not the product — it is infection control.
Blood is drawn, processed, and reintroduced through breached skin. That is a chain with several points where a lapse causes harm, and it has caused documented harm.
Why this category is different
Most aesthetic services involve a manufactured product going into a patient. PRP involves the patient’s own blood leaving, being handled, and returning. Every step in between is an opportunity for contamination or, worse, a mix-up between patients.
Public health investigations have documented transmission of bloodborne infection in cosmetic settings performing these procedures — traceable to unsafe injection practice and inadequate infection control rather than to the treatment concept itself.
That is the risk to design against.
The controls that actually matter
| Control | What it prevents |
|---|---|
| One patient, one set of everything | Cross-contamination between patients |
| Labelled tubes, verified at every transfer | Administering one patient’s blood to another |
| Single-use needles and cartridges, never reprocessed | Bloodborne transmission |
| No multi-dose vials shared across patients | Contamination of a shared source |
| Dedicated, disinfected processing area | Environmental contamination during centrifugation |
| Documented device cleaning between patients | Residual biological material on equipment |
| Sharps handling and disposal | Staff injury and exposure |
| Staff trained and competency-verified | Drift in technique over time |
None of this is exotic. It is standard infection control, and it is exactly what gets informal in a busy aesthetics practice where the staff are experienced and the routine feels safe.
The chain-of-custody problem
The single worst outcome in this category is administering the wrong patient’s blood. It is entirely preventable and entirely procedural.
A workable rule: the tube is labelled with the patient identifier at the moment of draw, in the room, in front of the patient — and the label is read aloud and confirmed again before reinjection. If two patients are ever being processed at once, that is a system that will eventually fail.
The scope question
Drawing blood, processing it, and injecting it are clinical acts. Who may perform each step is governed by state scope-of-practice rules and delegation, and delegation cannot exceed the receiving licence. A medical director does not expand anyone’s authority.
Separately, the evaluation that establishes whether the patient is a candidate has to happen before the draw, not as paperwork afterward.
Claims, briefly
PRP marketing frequently promises hair regrowth, scar resolution, or joint repair. Evidence quality varies considerably by indication, and confident outcome claims are difficult to substantiate. Describe the treatment, note that responses vary, and avoid guarantees.
What to audit this week
- Watch a full treatment start to finish and see whether the written protocol matches what happens
- Check that no multi-dose vial is being shared between patients
- Confirm nothing single-use is being reprocessed, including microneedling cartridges
- Verify labelling happens at the point of draw, not later at the bench
- Confirm every staff member’s scope covers what they are actually doing
- Test the adverse event path: who is reachable, and how fast
How MDside supports this
We write the protocols against what your staff actually perform, including chain of custody and infection control steps, confirm scope for each role, and provide the physician oversight that makes the delegation valid.
See what is included, or read about the evaluation that has to come first.
Frequently asked questions
Can a medical assistant draw blood for PRP?
It depends on state scope rules and valid delegation. Delegation cannot exceed what the licence permits, and a medical director does not expand it.
Can microneedling cartridges be reused?
Single-use devices are single-use. Reprocessing them is a bloodborne transmission risk and is indefensible.
Do we need a separate processing area?
A dedicated, disinfected area for centrifugation and handling is the practical standard. Processing blood on a general work surface is where contamination happens.
What is the biggest risk in PRP?
Infection control and chain of custody — contamination, or administering the wrong patient’s blood. Both are procedural and both are preventable.
Can I advertise PRP for hair restoration?
Describe the treatment and be careful with outcome claims. Evidence varies by indication and guarantees are not defensible.
General information about infection control and scope, not medical or legal advice. Confirm scope-of-practice with counsel licensed in your state and clinical protocols with your medical director.