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Glossary
Health Tech terms, explained
Short, plain definitions of the words you'll see on product pages and spec sheets. Each one links to a guide when there's more to know.
5
- 510(k) clearance
- An FDA pathway clearing a device as substantially equivalent to one already on the market. Read the guide →
B
- Bioimpedance (BIA)
- Estimating body composition from how a small electrical current passes through the body. Read the guide →
C
- Clinically validated
- Tested for accuracy against a recognized protocol, as used for blood pressure monitors. Read the guide →
D
- De Novo
- An FDA pathway for new low- to moderate-risk devices with no existing equivalent. Read the guide →
E
- ECG
- Electrocardiogram: a recording of the heart's electrical activity. Read the guide →
H
- HRV
- Heart rate variability: variation in time between heartbeats, used in recovery scores. Read the guide →
S
- SpO2
- Blood oxygen saturation, estimated by pulse oximeters and some wearables.
W
- Wellness feature
- A health-related feature not reviewed by the FDA for diagnosis, such as a sleep score. Read the guide →