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Abstract Details
Evaluation of Controlled Attenuation Parameter as a Tool for Assessment of Hepatic Steatosis in Living Liver Donors.
Mehta, Naimish N (NN);Rajput, Manmohan (M);Kumar, Karan (K);Nagar, Anand (A);Mahala, Vinay K (VK);Saraswat, Vivek A (VA);Mishra, Akash (A);
BACKGROUND: Currently, there is an absence of a standardised protocol for the preoperative detection of hepatic steatosis (HS) in living liver donors. A steatotic liver graft jeopardises the outcome of the recipient with multiple potential complications. Vibration-controlled transient elastography (Fibroscan®) provides a controlled attenuation parameter (CAP), which we have utilised in our assessment of HS in living liver donors. This approach offers a promising avenue for the advancement of preoperative evaluation protocols.
METHODS: In the period spanning from October 2022 to July 2024, a cohort of 67 liver donors were subjected to preoperative vibration-controlled transient elastography (Fibroscan®) and either preoperative or intraoperative liver biopsy. HS was defined as a fat content exceeding 10%. CAP readings were juxtaposed with liver biopsy results for the diagnosis of HS. Donors were categorised into three categories with HS <5%, 5-10% and those with HS >10% were rejected as per our institutional protocol. This facilitated a comprehensive evaluation of HS in the context of living donor liver transplantation.
RESULTS: CAP was very accurate in detecting HS, with an area under the receiver operating characteristic curve of 0.99 ( < 0.05). Statistical analysis determined that a CAP cutoff value of 266 dB/m provides a sensitivity of 100% and a specificity of 98.4% for predicting HS >10%. Corresponding positive predictive value (PPV) is 85.71%, while the negative predictive value is 100%. Univariate analysis determined body mass index (BMI), age and serum triglyceride levels were associated with CAP; however, multivariate linear regression revealed an association with only BMI ( < 0.001) and age ( < 0.002). When a lower fat threshold of 5% was considered to define HS with the same cut off of CAP, the sensitivity reduced to 66.7% and specificity was 98.3% The recipients of donors with HS of 5%-10% did not show any negative outcomes.
CONCLUSION: CAP demonstrates significant potential as a predictive tool for hepatic steatosis (HS) in living liver donors. Notably, BMI and age have been identified as independent factors associated with CAP values.
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