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Intraoperative liver steatosis characterization using diffuse reflectance spectroscopy.

Nina Reistad1, Jan H Nilsson2, Magnus Bergenfeldt2

  • 1Department of Physics, Lund University, Lund, Sweden.

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|July 28, 2018
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Summary
This summary is machine-generated.

Diffuse reflectance spectroscopy (DRS) can intraoperatively assess liver steatosis during surgery. This technology accurately distinguishes between different grades of fatty liver disease, aiding surgical decisions.

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Area of Science:

  • Hepatology
  • Medical Spectroscopy
  • Surgical Technology

Background:

  • Liver steatosis negatively impacts outcomes in liver transplantation and resection.
  • Accurate intraoperative tools are needed to identify and quantify liver steatosis.
  • Diffuse reflectance spectroscopy (DRS) is explored as a potential solution.

Purpose of the Study:

  • To investigate the capability of surface DRS measurements to detect liver steatosis in human patients during surgery.
  • To determine if DRS can reliably differentiate between various grades of hepatic steatosis.

Main Methods:

  • Utilized a DRS system comprising a light source, spectrometers, and a hand-held probe.
  • Acquired DRS spectra from the liver surface of 38 patients undergoing liver resection.
  • Analyzed 1210 DRS spectra using an analytical model correlating spectral data with steatosis grades.

Main Results:

  • DRS analysis successfully distinguished between mild-to-moderate and moderate-to-severe steatosis (p < 0.001).
  • Significant differences in scattering and absorption parameters (e.g., reduced scattering coefficient, lipid/(lipid+water) ratio) correlated with steatosis severity.
  • Parameters like blood and bile volume also showed significant differences between steatosis grades.

Conclusions:

  • Surface DRS measurements are effective for evaluating liver steatosis grades intraoperatively.
  • This spectroscopic technique offers a promising tool for real-time assessment of fatty liver disease during liver surgery.