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Related Experiment Videos

A new semiconductor lithotripsy sensor.

V R Singh1

  • 1Nat. Phys. Lab., New Delhi, India.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
PubMed
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A novel semiconductor lithotripsy sensor was developed for calibrating kidney stone disintegrators. This sensor offers high sensitivity and thermal stability, crucial for optimizing extracorporeal shock wave lithotripsy (ESWL) performance.

Area of Science:

  • Medical Devices
  • Semiconductor Sensors
  • Biomedical Engineering

Background:

  • Accurate calibration of lithotripters is essential for effective kidney stone treatment.
  • Existing methods may lack the precision needed for optimal performance monitoring.
  • Kidney stones affect a significant patient population requiring therapeutic intervention.

Purpose of the Study:

  • To develop and characterize a new semiconductor-based sensor for lithotripter calibration.
  • To assess the sensor's performance in monitoring shock wave parameters during lithotripsy.
  • To provide a tool for optimizing the therapeutic efficacy of kidney stone disintegrators.

Main Methods:

  • Fabrication of a four-arm Wheatstone bridge sensor chip using bipolar IC and bulk micromachining processes.

Related Experiment Videos

  • Integration of signal conditioning and amplification electronics onto the sensor chip.
  • Characterization of pressure sensitivity, nonlinearity, and thermal stability.

    • Main Results:

    • The sensor exhibits a pressure sensitivity of 10 V/mm Hg.
    • Nonlinearity was measured at 0.20% full-scale output.
    • Excellent thermal stability was observed, with less than 1.5% variation from -50°C to 300°C.

    Conclusions:

    • The developed semiconductor lithotripsy sensor demonstrates high sensitivity and resolution.
    • It is suitable for monitoring acoustic intensity and pressure amplitude of shock waves in extracorporeal shock wave lithotripsy (ESWL).
    • This sensor facilitates precise calibration of lithotripters for improved patient treatment.