How It Works
The Tasso+ adheres to your warmed, cleaned upper arm with medical-grade adhesive, creating the sealed environment its vacuum needs. When you press the button a painless collection starts, negative pressure then draws capillary blood into the attached tube until it reaches the intended volume. No vein-finding, no squeezing, the blood flows directly into the tube.
Is It Needle-Free?
It doesn't use a hollow venipuncture needle that enters a vein, it uses a very small retractable lancet that stays enclosed inside the device before and after activation. “Minimally invasive” is the precise wording, and honestly, that's what most people's experience reflects: a quick click, then done.
Placement and Practical Questions
Place it on the recommended fleshy area of the upper arm, following the included instructions. Either arm works just avoid the side with a recent hormone injection, topical hormone application, or any skin irritation. If flow is tricky, or you inject into your deltoid, placing the device somewhat lower on the upper arm (still above the elbow) can help. The device is sterile, single-use equipment, and it's perfectly fine to have someone help you place it.
FAQ
Does Tasso+ hurt?
No. Users report feeling nothing, they just hear a click.
Does the device test my blood?
No. Tasso+ collects the sample; all testing happens after it arrives at Rythm's clinical laboratory.
Is this a dried blood spot?
No. Rythm collects liquid blood into a lithium heparin microtube, which is what lets a clinical lab process it like any other specimen.