title: Accurate method for preoperative estimation of the right graft volume in adult-to-adult living donor liver transplantation.
abstract: BACKGROUND
  Accurate estimation of graft volume is crucial to avoid small-for-size syndrome following adult-to-adult living donor liver transplantation AALDLT). Herein, we combined radiological and mathematical approaches for preoperative assessment of right graft volume.
  
  
  METHODS
  The right graft volume was preoperatively estimated in 31 live donors using two methods: first, the radiological graft volume (RGV) by computed tomography (CT) volumetry and second, a calculated graft volume (CGV) obtained by multiplying the standard liver volume by the percentage of the right graft volume (given by CT). Both methods were compared to the actual graft volume (AGV) measured during surgery. The graft recipient weight ratio (GRWR) was also calculated using all three volumes (RGV, CGV, and AGV). Lin's concordance correlation coefficient (CCC) was used to assess the agreement between AGV and both RGV and CGV. This was repeated using the GRWR measurements.
  
  
  RESULTS
  The mean percentage of right graft volume was 62.4% (range, 55%-68%; SD +/- 3.27%). The CCC between AGV and RGV versus CGV was 0.38 and 0.66, respectively. The CCC between GRWR using AGV and RGV versus CGV was 0.63 and 0.88, respectively (P < .05). According to the Landis and Kock benchmark, the CGV correlated better with AGV when compared to RGV. The better correlation became even more apparent when applied to GRWR.
  
  
  CONCLUSIONS
  In our experience, CGV showed a better correlation with AGV compared with the RGV. Using CGV in conjunction with RGV may be of value for a more accurate estimation of right graft volume for AALDLT.
authors.affiliation: Department of Liver Transplantation and Hepatobiliary-Pancreatic Surgery, King Faisal Specialist Hospital & Research Center, Riyadh 11211, Saudi Arabia.
authors.forename: H
authors.initials: H
authors.lastname: Khalaf
authors.forename: M
authors.initials: M
authors.lastname: Shoukri
authors.forename: Y
authors.initials: Y
authors.lastname: Al-Kadhi
authors.forename: M
authors.initials: M
authors.lastname: Neimatallah
authors.forename: M
authors.initials: M
authors.lastname: Al-Sebayel
mesh_terms: D000328:Adult; D006498:Hepatectomy / Q000379:methods*; D006801:Humans; D008099:Liver / Q000033:anatomy & histology*; D016031:Liver Transplantation / Q000379:methods*; D019520:Living Donors; D011300:Preoperative Care; D020858:Tissue and Organ Harvesting / Q000379:methods*; D016896:Treatment Outcome