IEEE_TIM__A_Wireless_Implantable_Microsystem_for_Real_Time_Bladder_Volume_Monitoring.pdf (2.56 MB)
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A Wireless Implantable Microsystem for Real-Time Bladder Volume Monitoring

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posted on 2022-06-14, 22:56 authored by Soumyajit MandalSoumyajit Mandal, Parisa Dehghanzadeh, Hossein Zamani, Sameer Shaik

This paper describes an implantable wireless microsystem for making embedded ultrasound distance measurements and its applications in real-time bladder volume (BV) estimation. A tuned inductive link at 125 kHz is used for both power transfer and bidirectional data telemetry with the implanted unit. Implant power consumption is minimized by using a single-bit correlation receiver to estimate ultrasound time-of-flight (ToF) from A-mode data acquired by an on-board piezoelectric transducer. In vitro tests of the device (external diameter =30 mm including coil) in saline solution show a maximum operating depth of 3.2 cm from a 10 cm diameter external coil operated at +/-18 V. Wireless BV measurements using both spherical and non-spherical bladder phantoms show estimation errors < 15\% for volumes in the 50-300 mL range.


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Submitting Author's Institution

Brookhaven National Laboratory

Submitting Author's Country

  • United States of America