From 4fb16ed01277e19373e12a98a9b0fa2c91ce3678 Mon Sep 17 00:00:00 2001 From: Zach Fredin <zach.fredin@cba.mit.edu> Date: Sat, 9 May 2020 16:45:05 -0400 Subject: [PATCH] another math test --- pulseox.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/pulseox.md b/pulseox.md index e91ef8e..a168e53 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=Iin*e^-(D*C*E) +I=I_in*e^(-(D*C*\epsilon)) ``` -where _I_ is the intensity of light transmitted through the sample; _Iin_ is the intensity of the light prior to absorption by the sample; D is the optical path length; C is the solute concentration; and E 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. -- GitLab