Frozen, on-ice and platelet-poor plasma specimens
Some tests require the specimen to be chilled on ice right after the draw, frozen after the blood is separated, or spun twice to produce platelet-poor plasma. Speedy performs these steps in the field, right where the blood is drawn, instead of racing the clock to a stationary lab.
Why some tests need special handling
Certain substances in blood break down quickly once a tube leaves the body. Ammonia, lactate and some hormone tests need to go on ice immediately after the draw to keep the result accurate. Other tests require the serum or plasma to be separated from the red blood cells by centrifuge and then frozen before it has a chance to degrade. Still others, including some coagulation-related studies, require platelet-poor plasma specifically, which means spinning the separated plasma a second time at a higher speed to remove nearly all remaining platelets before freezing.
Getting any of these steps wrong, or simply getting to them too late, can change the measured result enough to mislead a provider, which is why these specimen types are treated with extra care rather than processed the same way as a routine chemistry panel.
A provider ordering one of these tests is usually investigating a specific concern, such as liver function, metabolic status, or a clotting disorder, so an accurate first result can spare you a repeat draw and a longer wait for answers.
The equipment that makes this possible outside a lab
A portable centrifuge lets us spin and separate blood on site rather than transporting a whole-blood tube across town and hoping it still qualifies for testing once it arrives. Cold packs keep specimens at refrigerator temperature during transport, and dry ice allows genuine freezing for tests that require it, maintaining a temperature far below what a standard cooler can achieve. Carrying all three pieces of equipment to every relevant appointment means we can meet most handling instructions without ever needing to bring you or your sample to a stationary facility.
Step by step at your appointment
We confirm the exact handling requirement with your provider’s order before the visit so there is no guesswork once we arrive. We draw the sample, and immediately begin whichever process is needed — placing the tube directly on ice, spinning it once or twice in the centrifuge, or transferring the separated plasma into a fresh labeled tube before freezing it on dry ice for transport to the receiving lab.
South Florida heat is a real factor
Ambient temperatures in places like Pembroke Pines or Hollywood routinely climb well above what a sensitive specimen should tolerate for more than a few minutes, so the cooling or freezing step has to start the moment the draw is complete rather than waiting until the sample reaches a lab across town later in the day. That immediacy is really the whole reason field processing exists for these test types.
When to follow up with your doctor
If your ordering provider changes the test or if you are unsure whether your condition requires fasting, hydration or activity restrictions before the draw, confirm those details with them directly, since handling instructions are set by the receiving lab and the ordering provider together, and we follow whichever protocol they specify.
How Speedy supports this type of order
This kind of field processing is part of what we offer under specialty lab kits, where the right equipment and a careful, well-practiced protocol matter just as much as the needle stick itself for getting a usable result.
Keeping multiple handling steps straight on one order
Some orders call for more than one handling pathway within the same visit — for example, one tube that needs to go on ice immediately while another from the same draw is centrifuged and frozen. Our technicians work from the specific instructions on your order rather than a generic checklist, labeling each tube as it is processed so there is no confusion about which specimen received which treatment once everything is packaged for transport.
We also log the time each step was completed, since some labs ask for documentation of when centrifuging or freezing began relative to the draw itself, particularly for tests tied to a research protocol or a specialty panel with strict stability requirements. That record travels with the specimen, giving the receiving lab confidence that the sample was handled correctly from the moment the needle came out of your arm.
Common follow-up questions
Can any mobile phlebotomist do a platelet-poor plasma spin?
It requires a centrifuge capable of the correct speed and duration, which is why we bring our own equipment rather than relying on a standard draw kit.
How quickly does a specimen need to go on ice?
It depends on the specific test; we follow the timing stated in the ordering lab’s own instructions for each order.
Do you provide the dry ice?
Yes, we bring cold packs and dry ice as needed for temperature-sensitive orders at no separate arrangement required from you.
Does freezing the specimen happen at my home or later?
Freezing and chilling steps begin at your location immediately after the draw whenever the test requires it.
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This article is general information, not medical advice. Follow the instructions of your ordering healthcare provider.
Need a mobile blood draw?
Serving Broward, Miami-Dade and Palm Beach. Call or text 954-232-9752.