PRPdose System Evaluation
Choosing a PRP System

Same patient. Same blood draw.
Different biology.

Two illustrative systems. One variable changes: measured platelet recovery.

Baseline platelet count235,000 /µL
Whole-blood draw30 mL
Identical patient inputs
System A
Measured platelet recovery
45%
Injectable platelet dose
2.9 B
System B
Measured platelet recovery
86%
Injectable platelet dose
5.5 B
Platelet recovery is only one measurement.Discover what else your PRP system may be telling you.
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A familiar moment

You reach for the same collection kit, regardless of the patient’s platelet count.

The draw volume feels routine. The biological dose is not.

Common assumptionThirty milliliters is enough for every patient.

A fixed draw provides a fixed volume, not a fixed number of platelets. Baseline platelet count, anticoagulant dilution and measured system recovery determine the injectable platelet dose.

The next time you draw blood for PRP, will you know whether the volume can reach the intended dose?

PRPdose principleYou cannot recover platelets that were never collected.
Same patient. Different blood draw volumes.
20 mLwhole blood
≈ 3.6 B
30 mLwhole blood
≈ 5.5 B
40 mLwhole blood
≈ 7.3 B
60 mLwhole blood
≈ 10.9 B
Illustrative calculation: baseline 235,000/µL, 10% anticoagulant dilution and 86% measured platelet recovery. Values are not universal device outputs.
A familiar moment

One centrifuge runs quietly. Another sounds like a small rocket ship.

Most clinicians have heard the difference. Few have asked what created it.

Common assumptionIf the blood separated, the centrifuge did its job.

Noise and vibration do not prove platelet injury, but they are visible and audible signals of the mechanical environment in which every cell is being processed.

Platelets are mechanosensitive cells. Their behavior can change in response to mechanical forces during collection and processing.

A protocol at 2,300 × g exposes cells to substantially greater centrifugal acceleration than a protocol at 1,500 × g. That does not automatically make the higher-force protocol inappropriate, but it does make the purpose and validation of the added force worth examining.

If the centrifuge had not been included with the disposable program, would you have selected that same model on its engineering performance alone?

PRPdose principleMechanical forces are part of the biology.
What does routine processing sound like?
Controlled motionStable rotor, consistent seating, controlled braking.
Visible vibrationA signal worth investigating, not dismissing as normal.
A higher RCF can be appropriate. Vibration is a separate engineering issue influenced by load, fit, rotor design, bearings, construction and maintenance.
A familiar moment

You hold two PRP syringes side by side, and they are not the same color.

Amber. Pink. Red. The visual difference is easy to see and not so easy to ignore.

Common assumptionColor is only a symtom of a complicated blood draw.

Color cannot define PRP quality by itself. It can, however, provide a visible quality-control signal. Pink plasma may reflect free hemoglobin from red-cell membrane disruption; red preparations may reflect intact erythrocyte carryover.

The next time the syringe is pink, will you accept it as normal, or ask what changed?

PRPdose principleVisible changes deserve scientific curiosity.
Three visible observations. Three different questions.
AmberMinimal visible RBC signal; composition still requires measurement.
PinkInvestigate possible hemolysis and the processing environment.
RedInvestigate intact RBC carryover and aspiration depth.
Visible appearance should trigger investigation, not an unsupported conclusion.
A familiar moment

The representative tells you the system produces LP-PRP. Have you ever measured it?

A product name can become a substitute for knowing what is actually in the syringe.

Common assumptionThe labeled formulation is the delivered formulation.

Some systems create a standardized product. Others allow intentional selection of leukocyte-poor, leukocyte-rich or monocyte-retaining/neutrophil-reduced profiles.

The relevant question is not whether every system offers every option. It is whether the system produces the profile you intend, and whether that profile is measurable and reproducible.

Are you choosing the cellular profile, or has the system already chosen it for you?

PRPdose principleChoose the biology before you choose the system.
One gradient. Different collection objectives.
LP-PRP objectiveLower total leukocyte content and limited buffy-coat collection.
What to measurePlatelets, RBCs, total WBCs and final volume.
The illustration is conceptual. Final cellular profiles require representative laboratory characterization.
A familiar moment

The workflow includes another spin, transfer or resuspension, because that is how the kit works.

An extra step can become routine before anyone asks what measurable value it adds.

Common assumptionMore processing produces better PRP.

Additional steps may improve concentration, volume control or a specific product characteristic. They also introduce additional time, force, handling, interfaces and operator-dependent variables.

The most important question is whether those added steps improve the final preparation in a way that produces better or more consistent patient outcomes.

If one step disappeared tomorrow, what measurable biological or clinical benefit would the preparation lose?

PRPdose principleEvery added step should have a demonstrated purpose.
Complexity is not automatically value.
Streamlined workflow
DrawSpinCollectInject
Fewer handling events and fewer variables to control.
Additional processing
DrawSpinOpenTransferRespinResuspendInject
May serve a purpose, but the biological benefit, reproducibility and relationship to patient outcomes should be demonstrated.
A familiar moment

Everyone is trained, but one staff member always seems to make the best PRP.

Experience can hide how much the final product depends on one person’s technique.

Common assumptionEvery trained operator produces the same biology.

A reproducible system should tolerate normal differences between trained users. If aspiration depth, timing, resuspension or handling depends on exceptional dexterity, the workflow itself becomes a source of variability.

Processing errors can require another disposable kit, a repeat spin, additional blood collection, more patient discomfort or a delayed procedure.

How often does your workflow require a replacement kit or another blood draw because the first preparation was not usable?

PRPdose principleReproducibility is part of product quality.
Same instructions. Three operators.
Operator 1Clear interface, intended aspiration depth, expected appearance.
Operator 2Slightly deeper collection, increased RBC or granulocyte carryover.
Operator 3Gradient disturbed during removal or resuspension.
The goal is not zero human variation. It is a workflow designed to remain reliable under normal trained use.
A familiar moment

You chose the system from a representative you already knew and trusted.

Availability, service and strong OR relationships are valuable. They are not the same as biological performance.

Common assumptionA good representative means a good system.

A responsive representative may improve training, logistics and support. The technology still deserves an independent evaluation of dose capacity, recovery, cellular profile, centrifuge quality, workflow and evidence.

If every system were sold by the same representative, which one would you choose?

PRPdose principleEvaluate the relationship and the technology independently.
Two separate strengths deserve two separate evaluations.
Representative valueAvailability, education, service, responsiveness and account support.
System valueDose capacity, recovery, cellular profile, mechanical quality, reproducibility and evidence.
The decisionA strong partnership is ideal, but support should not substitute for objective product evaluation.
A familiar moment

The procedure is routine, so the system feels proven.

Familiarity creates confidence. Evidence determines whether that confidence is justified.

Common assumptionIf the workflow has not caused an obvious problem, it is safe and reproducible.

Safety includes sterility, but it also includes reliable blood collection, correct anticoagulant ratio, balanced processing, device integrity, controlled transfers, traceability and consistent delivery of the intended product.

Which parts of your confidence are supported by measurement, and which are supported by routine?

PRPdose principleConfidence should be measurable, demonstrable and reproducible.
What has actually been demonstrated?
BiologyPlatelet dose, recovery, RBC content and leukocyte differential.
EngineeringRCF, rotor fit, balance tolerance, braking, vibration and maintenance.
WorkflowOperator reproducibility, open steps, failures, redraws and repeat spins.
Clinical usePatient reactions, outcomes, traceability and real-world consistency.

Which assumptions are supported by evidence, and which are supported by habit?

The goal is not to tell you which system to buy. It is to help you recognize whether the system you use consistently produces the biology you intend to deliver.

Know Your Dose →