> The device takes its measurements by shooting an electrical current into the skin and then analyzing the body’s response, which is known as bioimpedance. There is a correlation between bioimpedance and changes in blood pressure that has to do with blood volume changes. However, the correlation is not particularly obvious, so the team had to create a machine learning model to analyze the connection to get accurate blood pressure readings.
This makes me curious how accurate, precise, and responsive the readings are. The article didn't mention anything in that regard.
The article said "researchers at The University of Texas at Austin and Texas A&M University have developed an electronic tattoo that,..., and deliver continuous blood pressure measurements at an accuracy level exceeding nearly all available options on the market today".
“0.2 ± 4.5 mm Hg for diastolic pressures and 0.2 ± 5.8 mm Hg for systolic pressures, a performance equivalent to Grade A classification” per the Nature abstract linked in the article: https://www.nature.com/articles/s41565-022-01145-w
This makes me curious how accurate, precise, and responsive the readings are. The article didn't mention anything in that regard.