Start with the free download of the application note, schematics and 'C' source code that can easily be modified to your specific application needs.
This reference design helps you develop a low-cost, low-power, handheld or portable blood pressure meter with user interface.*
*Microchip medical reference designs and demos are intended for evaluation and development purposes only. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use.
Microchip’s pulse oximeter reference design demo board helps designers develop a low-cost, low power handheld or wearable pulse oximeter with user interface which is capable of measuring both heart rate and blood oxygen level. It can be used to start development of a hospital or clinical pulse oximeter design, but it can also be used as a starting point for the development of a wearable activity tracker design that can measure heart rate and blood oxygen level. http://www.microchip.com/medical