Illustration and principle of the subcutaneous and continuous BP monitoring by PMUTs in an ambulatory sheep. (IMAGE)

Aerospace Information Research Institute, Chinese Academy of Sciences

Illustration and principle of the subcutaneous and continuous BP monitoring by PMUTs in an ambulatory sheep.

Caption

Illustration and principle of the subcutaneous and continuous BP monitoring by PMUTs in an ambulatory sheep. a The PMUT device is implanted subcutaneously near the sheep’s femoral artery to emit ultrasound and collect major echoes from interfaces at the artery’s anterior and posterior walls due to the large acoustic impedance mismatch between blood and arterial tissue. b Echoes from both walls are captured to estimate changes in the femoral artery’s diameter due to BP changes. c The extracted diameter changes are used to derive BP waveforms.

Credit

Microsystems & Nanoengineering

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CC BY

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