diff --git a/pulseox.md b/pulseox.md index a168e534183dae960df9d59df4350947a6ac3af9..abf442e38909a98df55efaa9cc1038873d97cd9b 100644 --- a/pulseox.md +++ b/pulseox.md @@ -27,6 +27,6 @@ A quick teardown of a ~$20 500BL from Walgreens revealed no integrated photonics ## Operational Theory Pulse oximetry is based on the [Beer-Lambert law](https://en.wikipedia.org/wiki/Beer%E2%80%93Lambert_law), a principle that relates the concentration of a species to the attenuation of light through a sample: ```math -I=I_in*e^(-(D*C*\epsilon)) +I=I_in*e^{-(D*C*\epsilon)} ``` -where _I_ is the intensity of light transmitted through the sample; $`I_in`$ is the intensity of the light prior to absorption by the sample; _D_ is the optical path length; _C_ is the solute concentration; and $`\epsilon`$ is the extinction coefficient, the sample's absorption at a given wavelength of light. +where $`I`$ is the intensity of light transmitted through the sample; $`I_in`$ is the intensity of the light prior to absorption by the sample; $`D`$ is the optical path length; $`C`$ is the solute concentration; and $`\epsilon`$ is the extinction coefficient, the sample's absorption at a given wavelength of light.