[Waveform Patterns and BOS]
When the mean blood flow (DC) within one heartbeat is low, BOS shows a low value.
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When the mean blood flow decreases, BOS also decreases. |
| BOS: Hi | BOS: Low |
When the mean blood flow (DC) within one heartbeat is low and the amplitude (AC) is large, BOS shows a low value.
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When the fluctuation component is large, BOS decreases. |
| BOS: Hi | BOS: Low |
[Supplementary Note]
Before BOS was formulated with its current equation, it was displayed as "AC/DC" in the analysis software. Considering clinical ease of understanding, the name was changed to BOS and the formula was revised to the current one.
[Notes Regarding BOS]
In areas where an opaque, thick membrane (such as the stratum corneum or retinal pigment epithelium) that appears to have low blood flow velocity covers the upper layer, it obscures underlying areas with abundant blood flow. As a result, the response is lower than the actual blood flow fluctuation, and BOS may show a higher value than expected.