Here's some reading on the alternatives I was thinking about. https://www.medgadget.com/2012/01/company-claims-optical-blood-pressure-monitor-breakthrough.html

Here's some reading on the alternatives I was thinking about. https://www.medgadget.com/2012/01/company-claims-optical-blood-pressure-monitor-breakthrough.html https://www.medgadget.com/2012/01/company-claims-optical-blo... https://www.ncbi.nlm.nih.gov/pubmed/24110216 https://www.ncbi.nlm.nih.gov/pubmed/24110216