Abstract
Background
Preoperative risk assessment for post-hepatectomy liver failure (PHLF) is essential for major hepatectomy. We intended to establish a standard liver volume (SLV) formula for Korean patients and validate the predictive power of the indocyanine green clearance rate constant (ICG-K) fraction of future remnant liver (FRL) (FRL-kICG) to total liver volume (TLV).
Methods
This study comprised 2 retrospective studies. Part I established SLV formula and acquired ICG pharmacokinetic data from 2155 living donors. In part II, FRL-kICG cutoff was determined using 723 patients who underwent right liver resection for hepatocellular carcinoma.
Results
In part I, the formula SLV (mL) = −456.3 + 969.8 × BSA (m2) (r = 0.707, r 2 = 0.500, p = 0.000) was derived with mean volume error of 10.5 %. There was no correlation between TLV and ICG retention rate at 15 min. With a cutoff of 0.04 with hepatic parenchymal resection rate (PHRR) limit of 70 %, 99.0 % of our living donors were permissible for left or right hepatectomy. In part II, 25 hepatocellular carcinoma patients (3.5 %) showed an FRL-kICG or SLV-corrected FRL-kICG <0.05. Of these, 4 (16 %) died of PHLF, whereas only 2 (0.3 %) died in the other patient group with both an FRL-kICG and SLV-corrected FRL-kICG ≥ 0.05 (P = 0.000).
Conclusions
The FRL-kICG appears to reliably predict PHLF risk quantitatively. We suggest FRL-kICG cutoffs of 0.04 and 0.05 with PHRR limits of 70 % and 65 % for normal and diseased livers, respectively. Further validation with large patient population in multicenter studies is necessary to improve FRL-kICG predictability.
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Abbreviations
- BMI:
-
Body mass index
- BSA:
-
Body surface area
- ICG:
-
Indocyanine green
- ICG-R15 :
-
ICG retention rate at 15 min
- ICG-K:
-
ICG clearance rate constant
- ICG-Rmax :
-
Maximum removal rate of ICG
- SLV:
-
Standard liver volume
- TLV:
-
Total liver volume
- PHRR:
-
Parenchymal hepatic resection rate
- FRL:
-
Future remnant liver
- FRL-kICG:
-
ICG-K fraction of FRL
- LDLT:
-
Living donor liver transplantation
- HCC:
-
Hepatocellular carcinoma
- PHLF:
-
Post-hepatectomy liver failure
- CT:
-
Computed tomography
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Hwang, S., Ha, TY., Song, GW. et al. Quantified Risk Assessment for Major Hepatectomy via the Indocyanine Green Clearance Rate and Liver Volumetry Combined with Standard Liver Volume. J Gastrointest Surg 19, 1305–1314 (2015). https://doi.org/10.1007/s11605-015-2846-8
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DOI: https://doi.org/10.1007/s11605-015-2846-8