Ann Surg Treat Res.  2022 Jul;103(1):47-52. 10.4174/astr.2022.103.1.47.

A new formula for estimation of standard liver volume using liver height and thoracic width

Affiliations
  • 1School of Global Entrepreneurship and Information Communication Technology, Handong Global University, Pohang, Korea
  • 2Department of Surgery, Jeonbuk National University Medical School, Jeonju, Korea
  • 3Biomedical Research Institute, Jeonbuk National University Hospital, Jeonju, Korea
  • 4Research Institute of Clinical Medicine of Jeonbuk National University, Jeonju, Korea

Abstract

Purpose
Precise estimation of the standard liver volume (SLV) is crucial in decision making regarding major hepatectomy and living donor liver transplantation. This study aimed to propose an accurate and efficient formula for estimating the SLV in the Korean population.
Methods
We created a regression model for SLV estimation using a data set of 230 Korean patients with healthy livers. The proposed model was cross validated using a different data set of 37 patients with healthy livers. The total liver volume (TLV), except for the volume of liver blood vessels, was measured through computed tomography volumetry as the dependent variable. Various anthropometric variables, liver height (LH), thoracic width (TW), age, and sex (0, female and 1, male) were considered as candidates for independent variables. We conducted stepwise regression analysis to identify variables to be included in the proposed model.
Results
A new formula was established; SLV = −1,275 + 9.85 × body weight (BW, kg) + 19.95 × TW (cm) + 7.401 × LH (mm). The proposed formula showed the best performance among existing formulas over the cross-validation data set.
Conclusion
The proposed formula derived using BW, TW, and LH estimated the TLV in the cross-validation data set more accurately than existing formulas.f

Keyword

Hepatectomy; Liver transplantation; Living donors

Figure

  • Fig. 1 Measurement of thoracic width (arrow) as the distance between the left and right costophrenic angle using a scout image obtained during a CT scan.

  • Fig. 2 Measurement of liver height as the absolute difference between the z-coordinates of the top (A) and bottom (B) CT slices containing the liver region using the Medical Imaging Interaction Toolkit [24]. 3D, 3 dimensional.

  • Fig. 3 Liver segmentation for liver volumetry by Dr. Liver (Humanopia, Inc., Pohang, Korea). 3D, 3 dimensional.


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