Living Donor Liver Research Articles

THU-506 - Risk factors associated with surgical morbidities of laparoscopic living liver donors

THU-506 - Risk factors associated with surgical morbidities of laparoscopic living liver donors

CAQ Corner: Evaluation and management of living liver donors.

CAQ Corner: Evaluation and management of living liver donors.

Living well or not? Quality of life of parental living liver donors: A cross-sectional study.

The aim of this study was to gain comprehensive insight into the quality of life of parental living liver donors after liver donation. Several studies reported good quality of life of living liver donors with the SF-36 scale. Care demand from the recipient and responsibility of being parent might make a difference in parental donors' personal experienced quality of life after transplantation surgery. It is a cross-sectional study. The parental donors' demographics, clinical data and post-donation complications were obtained. Quality of life was assessed using the Medical Outcomes Study SF-36 and the Quality of Life Scale of Living Organ Donors-Common Module. The enrolled participants were contacted by electronic questionnaires and telephonic interview. A total of 345 parental donors were included, with recruited period ranging from 3 to 85 months post-donation. 8.1% of donors had post-operative complications, mostly classified as Clavien grade II. Donors' general quality of life was higher than the Chinese general norm. Issues related to surgical incision, fatigue, worries about income and personal health, effects on work capability, increased medical expenses and difficult reimbursement and suspected donation decision were the prominent problems among donors. Mother-son relationship (OR = 1.87) and equal or less than 2 years after donation (OR = 3.08) were the influencing factors for poor physical quality of life, while unmarried status (e.g. divorced or widowed) was found negatively associated with mental quality of life (adjusted OR = 3.61). General health among parental donors is good but those female, unmarried and near post-donation might in low life quality. Incision, fatigue, finance, reimbursement and donation decision are prominent problems. Post-donation care of living donors should cover social and financial domain besides physical and mental dimension. Providing follow-up care and counselling is necessary to ensure their life quality.

Comparison of pure laparoscopic donor right posterior sectionectomy versus right hemihepatectomy for living donor liver transplantation.

The right posterior section (RPS) graft for living donor liver transplantation is an alternative graft in a live liver donor with insufficient remnant left lobe volume and portal vein anomaly. Although there have been some reports regarding pure laparoscopic donor right posterior sectionectomy (PLDRPS), no study has compared PLDRPS versus pure laparoscopic donor right hemihepatectomy (PLDRH). The aim of our study was to compare the surgical outcomes of PLDRPS versus PLDRH at centers achieving a complete transition from open to laparoscopic approach in liver donor surgery. From March 2019 to March 2022, a total of 351 living donor liver transplantations, including 16 and 335 donors who underwent PLDRPS and PLDRH, respectively, were included in the study. In the donor cohort, there were no significant differences in major complication (≥grade III) rate and comprehensive complication index between the PLDRPS versus PLDRH group (6.3% vs. 4.8%; p = 0.556 and 2.7 ± 8.6 vs.1.7 ± 6.4; p = 0.553). In the recipient cohort, there was a significant difference in major complication (≥grade III) rate (62.5% vs. 35.2%; p = 0.034) but no significant difference in comprehensive complication index (18.3 ± 14.9 vs. 15.2 ± 24.9; p = 0.623) between the PLDRPS and PLDRH groups. PLDRPS in live liver donors with portal vein anomaly and insufficient left lobe was technically feasible and safe with experienced surgeons. The PLDRPS group might be comparable with the PLDRH group based on the surgical outcomes of donors and recipients. However, in terms of recipient outcomes, more careful selection of donors of the RPS graft and further research in a large number of cases are necessary to evaluate the usefulness of PLDRPS.

Simultaneous 3-way Paired Exchange Liver Transplantation Without Nondirected Donation: Novel Strategy to Expand the Donor Pool.

Simultaneous 3-way Paired Exchange Liver Transplantation Without Nondirected Donation: Novel Strategy to Expand the Donor Pool.

Relationship of the Presence of the Inferior Right Hepatic Vein with the Right Hepatic Vein Diameter and CT Liver Volumetry.

Background Right hepatic venous anatomy, right lobe volume, and percentage of remnant liver are issues to be considered in preoperative planning especially transplantation. Objectives The aim of this study was to investigate the relationship of the presence of the inferior right hepatic vein (IRHV) with the right hepatic vein (RHV) diameter, right lobe volume, and percentage of remnant liver. Materials and Methods In t his cross-sectional study, the computed tomography (CT) images of 90 patients who underwent triphasic CT for being living liver donation were evaluated retrospectively. The number and diameter of IRHVs and the diameter of main RHV were recorded. For the liver volume analysis, a deep learning-based automatic liver segmentation (Hepatic VCAR) program was used. A virtual hepatectomy plane was drawn, where the right and left liver volumes were found and the percentage of the left lobe to the total liver volume was calculated. Pearson's correlation analysis was used for correlation analysis and Student's t -test was used to compare parameters. Results A total of 74 IRHVs were detected in 53 (58.88%) of 90 patients. There were no differences in the percentage of remnant left lobe volume, right lobe volume, and RHV diameter between the IRHV (+) and (-) groups. The RHV diameter had a weak negative correlation with the IRHV diameter, and a weak positive correlation with the right lobe volume. Conclusions The percentage of remnant left lobe volume, right lobe volume, and RHV diameter did not differ in liver donors with and without an IRHV. The RHV diameter had a weak negative correlation with the IRHV diameter and a weak positive correlation with the right lobe volume.

Thrombectomized autologous portal Y-graft inflow construction can be an option in living-donor liver transplantation: a case report

BackgroundIn living-donor liver transplantation (LDLT), portal Y-graft interposition using the recipient’s portal vein (PV) bifurcation has been used for right lobe grafts with double PV orifices. We herein report the use of thrombectomized autologous portal Y-graft interposition for a recipient with preoperative portal vein thrombosis (PVT) in a right lobe LDLT with double PV orifices.Case presentationThe recipient was a 54-year-old male with end-stage liver disease due to alcoholic liver cirrhosis. There was PV thrombus in the recipient’s PV. The living liver donor was his 53-year-old spouse, and a right lobe graft was planned for the transplantation. Since the donor's liver had a type III PV anomaly, autologous portal Y-graft interposition after thrombectomy was planned for PV reconstruction in the LDLT. The portal Y-graft was resected from the recipient and a thrombus extending from the main PV to the right PV branch was removed on the back table. The portal Y-graft was anastomosed to the anterior and posterior portal branches of the right lobe graft. Followed by venous reconstruction, the Y-graft was anastomosed to the recipient’s main PV. The operation time was 545 min and the intraoperative blood loss was 1355 ml. The recipient was discharged on postoperative day 13 without any complications. The recipient remains well with the patency of the portal Y-graft one year after the liver transplantation.ConclusionWe herein report the successful use of autologous portal Y-graft interposition after thrombectomy on the back table for a recipient with PVT in a right lobe LDLT.

Abstract 5903: Comparison of the tissue and gut microbiome in extrahepatic cholangiocarcinoma patients and healthy liver donors

Abstract Background: Biliary tract cancer (BTC) is an aggressive malignancy associated with a poor prognosis. Most BTC patients are diagnosed at an unresectable stage; further, the efficacy of cytotoxic chemotherapy for BTC remains unsatisfactory. Recently, there is growing evidence that gut microbial dysbiosis is related to multiple diseases, including biliary disease and cancer. However, the association between tumor and gut microbiome environments and BTC, especially extrahepatic cholangiocarcinoma (EH-CCA), remains unclear. In the present study, we compared the microbiome from the tissue and stool samples of EH-CCA patients and healthy living liver donors (controls). Methods: A total of 24 people (13 EH-CCA patients and 11 healthy controls) were included. We collected fecal and swab samples, which were obtained from the EH-CCA tissues of the patients and normal gallbladder tissues of the controls during operation. The bacterial 16S rRNA gene (V3 and V4 region) was amplified using PCR and sequenced on the Illumina MiSeq platform. The QIIME 2 pipelines were used to analyze the raw data. Results: The median age of the patients and controls were 70 (range, 58-79) and 29 (range, 19-35) years, respectively. The swab samples from EH-CCA patients showed significantly lower alpha diversity than the samples from the controls (pShannon < 0.001). Proteobacteria was the most commonly found phylum (53%) in the EH-CCA patients; Firmicutes (79%) and Actinobacteria (13%) were the common phyla in the controls. The genera Streptococcus (25.1%), Escherichia_Shigella (16.9%), and Enterococcus (13.9%) were found in the patient samples, whereas Blautia (12%), Limosilactobacillus (12%), and Bifidobacterium (19%) were observed in the controls. The Principal Coordinate Analysis (PCoA) plot of the weighted UniFrac distances showed that the patient and control groups formed separate clusters. Among the fecal samples, Streptococcus (12.5%), bacterioides (8.2%) is most common in patients’ group, whereas Blautia (13.8%) and Faecalibacterium (11.5%) is most common in control group at the gene levels. The PCoA plot of the fecal samples showed significant differences in microbiota composition between the EH-CCA patients and healthy controls (P=0.001 by PERMANOVA). In the beta diversity analysis of all samples (swab plus fecal), the patient-swab samples formed distinct clusters, whereas the patient-fecal, control-swab, and control-fecal samples showed overlapping clusters.Conclusions: To the best of our knowledge, this study is the first that compares the microbiome of tissues and stools from EH-CCA patients and healthy controls; the EH-CCA patients and healthy controls showed different microbiota profiles. Further studies are needed to investigate the clinical implications of microbial dysbiosis in BTC and formulate novel microbiome-based treatments for BTC. Citation Format: Sora Kang, Jihee Kang, Gun-Seok Park, Seung-Hyun Ko, Jung-Hyun Park, Yunseon Jang, Ik-Chan Song, Hyewon Ryu, Seok-Hwan Kim. Comparison of the tissue and gut microbiome in extrahepatic cholangiocarcinoma patients and healthy liver donors. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 5903.

The current landscape of pediatric living donor liver transplantation in the United States: Benefits, challenges, and future directions.

The current landscape of pediatric living donor liver transplantation in the United States: Benefits, challenges, and future directions.

Risk Factors Associated With Surgical Morbidities of Laparoscopic Living Liver Donors.

This study analyzed the incidence and risk factors for surgical morbidities of laparoscopic living donors. Although laparoscopic living donor programs have been established safely in leading centers, donor morbidities have not been discussed sufficiently. Laparoscopic living donors operated on from May 2013 to June 2022 were reviewed. Donor complications were reviewed, and factors related to bile leakage and biliary stricture were analyzed using the multivariable logistic regression method. A total of 636 donors underwent laparoscopic living donor hepatectomy. The open conversion rate was 1.6%, and the 30-day complication rate was 16.8% (n=107). Grade IIIa and IIIb complications occurred in 4.4% (n=28) and 1.9% (n=12) of patients, respectively. The most common complication was bleeding (n=38, 6.0%). Fourteen donors (2.2%) required reoperation. Portal vein stricture, bile leakage, and biliary stricture occurred in 0.6% (n=4), 3.3% (n=21), and 1.6% (n=10) of cases, respectively. The readmission rate and reoperation rate were 5.2% (n=33) and 2.2% (n=14), respectively. Risk factors related to bile leakage were 2 hepatic arteries in the liver graft (OR=13.836, CI=4.092-46.789, P <0.001), division-free margin<5mm from the main duct (OR=2.624, CI=1.030-6.686, P =0.043), and estimated blood loss during operation (OR=1.002, CI=1.001-1.003, P =0.008), while the Pringle maneuver (OR=0.300, CI=0.110-0.817, P =0.018) was protective against leakage. Regarding biliary stricture, bile leakage was the only significant factor (OR=11.902, CI=2.773-51.083, P =0.001). Laparoscopic living donor surgery showed excellent safety for the majority of donors, and critical complications were resolved with proper management. To minimize bile leakage, cautious surgical manipulation is needed for donors with complex hilar anatomy.

Financial, policy, and ethical barriers to the expansion of living donor liver transplant: Meeting report from a living donor liver transplant consensus conference.

In October 2021, the American Society of Transplantation (AST) hosted a virtual consensus conference aimed at identifying and addressing barriers to the broader, safe expansion of living donor liver transplantation (LDLT) throughout the United States (US). A multidisciplinary group of LDLT experts convened to address issues related to financial implications on the donor, transplant center crisis management, regulatory and oversight policies, and ethical considerations by assessing the relative significance of issues in preventing LDLT growth, with proposed strategies to overcome barriers. Living liver donors endure multiple obstacles including financial instability, loss of job security, and potential morbidity. These concerns, along with other center, state, and federal specific policies can be perceived as significant barriers to expanding LDLT. Donor safety is of paramount importance to the transplant community; however, regulatory and oversight policies aimed at ensuring donor safety can be viewed as ambiguous and complicated leading to time-consuming evaluations that may deter donor motivation and program expansion. Transplant programs need to establish appropriate crisis management plans to mitigate potential negative donor outcomes and ensure program viability and stability. Finally, ethical aspects, including informed consent for high-risk recipients and use of non-directed donors, can be perceived as additional barriers to expanding LDLT.

Utilizing ultra-small volume graft in auxiliary liver transplantation for portal hypertension

Objective: To examine the clinical effect of auxiliary liver transplantation with ultra-small volume graft in the treatment of portal hypertension. Methods: Twelve cases of portal hypertension treated by auxiliary liver transplantation with small volume graft at Liver Transplantation Center,Beijing Friendship Hospital, Capital Medical University between December 2014 and March 2022 were studied retrospectively. There were 8 males and 4 females,aged 14 to 66 years. Model for end-stage liver disease scores were 1 to 15 points and Child scores were 6 to 11 points. The grafts was derived from living donors in 9 cases,from split cadaveric donors in 2 cases,from whole cadaveric liver of child in 1 case. The graft recipient body weight ratios of 3 cadaveric donor livers were 0.79% to 0.90%, and of 9 living donor livers were 0.31% to 0.55%.In these cases, ultra-small volume grafts were implanted. The survivals of patient and graft, complications, portal vein blood flow of residual liver and graft, abdominal drainage and biochemical indexes of liver function were observed. Results: All the grafts and patients survived. Complications included outflow tract torsion in 2 cases, acute rejection in 1 case, bile leakage in 1 case, and thyroid cancer at the later stage of follow-up in 1 case, all of which were cured. The torsion of outflow tract was attributed to the change of anastomotic angle after the growth of donor liver. After the improvement of anastomotic method, the complication did not recur in the later stage. There was no complication of portal hypertension. The measurement of ultrasonic portal vein blood flow velocity showed that the blood flow of residual liver decreased significantly in the early stage after operation, and maintained a very low blood flow velocity or occlusion in the long term after operation, and the blood flow of transplanted liver was stable. Conclusions: Auxiliary liver transplantation can implant ultra-small donor liver through compensation of residual liver. This method may promote the development of living donor left lobe donation and split liver transplantation. However, the auxiliary liver transplantation is complex, and it is difficult to control the complications. Therefore, this method is currently limited to centers that are skilled in living related liver transplantation and that have complete ability to monitor and deal with complications.

Living donor liver transplant: A strategy to increase transplant access

Living donor liver transplant: A strategy to increase transplant access

WITHDRAWN: Multiple Swaps Tested: Rehearsal for Triple and Five-Liver Paired Exchanges

Despite several advances in living donor liver transplant (LDLT), many potential living liver donors cannot donate their organs to their relatives because of blood group incompatibility and unsuitable anatomy. Liver paired exchange (LPE) can be used to overcome incompatibilities between living donor-recipient pairs. In this study, we report the early and late results of 3 and 5 LDLTs performed simultaneously to initiate the more complex LPE program. By demonstrating that our center is capable of performing up to 5 LDLTs, we have taken an essential step for establishing a complex LPE program.

Gift Discourse in Transplant and Its Implications in Anonymous Living Liver Donation

The Gift of Life metaphor is prevalent in pro-donation dialogue, aiming to promote transplant programs and conceptualize the act of organ donation. To obtain a better understanding of living donor perceptions on the term Gift of Life, we analyzed thematic views presented by anonymous living donors (ALLDs). Twenty-six ALLDs completed a semi-structured qualitative interview consisting of questions regarding their motivations, experiences, and perceptions on donation. The following 5 major themes relating to the Gift of Life terminology were elucidated: (1) Complete agreement with the term and its relevance to donation. (2) Their donation did not represent a Gift of Life. (3) The term was too grandiose. (4)A belief that the term has more meaning for the recipient rather than donor. (5 )That the "gift" goes both ways, with the donor also benefiting from the experience.

High-resolution MR imaging with gadoxetate disodium for the comprehensive evaluation of potential living liver donors.

Several major transplantation centers have used composite multimodality evaluation for the preoperative evaluation of potential living liver donors. This approach can be time-consuming and, although rare, can cause complications. We aimed to demonstrate the clinical feasibility of our comprehensive preoperative MR protocol for the preoperative assessment of living liver donor candidates instead of composite multimodality evaluation. Thirty-five consecutive living liver donor candidates underwent multiphasic liver CT and comprehensive donor protocol MR examinations for preoperative evaluation in a single large-volume liver transplantation (LT) center. Three blinded abdominal radiologists reviewed the CT and MR images for vascular and biliary variations. The strength of agreement between CT and MR angiography was assessed using the kappa index. The detection rate of biliary anatomical variations was calculated. The sensitivity and specificity for detecting significant steatosis (>5%) were calculated. The estimated total volume and right lobe volumes measured by MR volumetry were compared with the corresponding CT volumetry measurements using the intraclass correlation coefficient (ICC). Among the 35 patients, 26 underwent LT. The measurement of agreement showed a moderate to substantial agreement between CT and MR angiography interpretations (kappa values, 0.47-0.79; p < 0.001). Combining T2-weighted and T1-weighted MR cholangiography techniques detected all biliary anatomical variations in 9 of the 26 patients. MR-proton density fat fraction showed a sensitivity of 100% (3/3) and a specificity of 91.3% (21/23) for detecting pathologically determined steatosis (>5%). MR volumetry reached an excellent agreement with CT volumetry (reviewers 1 and 2: ICC, 0.92; 95% CI, 0.84-0.96). Our one-stop comprehensive liver donor MR imaging protocol can provide complete information regarding hepatic vascular and biliary anatomies, hepatic parenchymal quality, and liver volume for living liver donor candidates and can replace composite multimodality evaluation.

Long-term risk of a fatty liver in liver donors.

Approximately 30 years have passed since the first experience of living donor liver transplantation. The time to evaluate the long-term safety of living donors has been fulfilled. Meanwhile, nonalcoholic fatty liver disease is increasingly common and a critical problem. The aim of this study was to evaluate the safety of living donor, focusing on fatty liver postdonation hepatectomy. Living donors (n=212, 1997-2019) were evaluated by computed tomography (CT) at >1-year postdonation. A liver to spleen (L/S) ratio of <1.1 was defined as fatty liver. Among 212 living liver donors, 30 (14.2%) detected fatty liver at 5.3 ± 4.2 years postdonation. The cumulative incidence rates of fatty liver were 3.1%, 12.1%, 22.1%, and 27.7% at 2, 5, 10, and 15 years postdonation, respectively. Of 30 subjects who developed fatty liver, 18 (60%) displayed a severe steatosis (L/S ratio <0.9). Five (16.7%) had a prior history of excessive alcohol abuse. More than 30% developed metabolic syndrome including obesity, hyperlipidemia, and diabetes. Although six (20%) had a Fib-4 index of >1.3, which included a case with a Fib-4 index of >2.67, no significant increased Fib-4 index was observed in the subjects with fatty liver as compared to those without fatty liver (p =0.66). The independent predictive risk factors for developing fatty liver were male sex, pediatric recipient, and higher body mass index (>25) at donation. Living donors with risk factors for developing fatty liver should be carefully followed-up for the prevention and management of metabolic syndrome.

Biliary Complications in Living Liver Donors After Donor Hepatectomy: A Single-Center Experience

The most frequent postoperative morbidity following living donor liver transplant is biliary complications, which can happen for both anatomical and procedural reasons. We conducted a retrospective analysis of 104 patients who were living liver donors undergoing hepatectomy from January 2011 to April 2022. We evaluated all perioperative finding such as age, sex, remnant liver volume, biliary anatomy, theduration of operation time and hospitalization, and blood loss. Clavien-Dindo classification grade III complications were observed in 24% of all donors, with rate of biliary complications of 7.6% (n = 8). All biliary complications were typified as biliary leakage, and an endoscopic retrograde cholangiopancreatography procedure was performed for 5 patients. We analyzed the clinical and surgical features and discovered that the duration of hospitalization was longer in the biliary leakage group than the group without leakage (15.7 ± 5.8 days vs. 30.8 ± 9.3 days, respectively; P < .08). There was no significant statistical relationship between age, the duration of operation time, intraoperative blood loss, and remnant liver volume versus biliary leakage (P = .074, P = .217, P = .219, and P = .363, respectively). Early detection and treatment of complications are ensured during the perioperative process by carefuldonor selection andaccurate identification of the patient atrisk for biliary complications.

Assessment of Liver Regeneration in Patients Who Have Undergone Living Donor Hepatectomy for Living Donor Liver Transplantation.

Inflammation and the associated immune pathways are among the most important factors in liver regeneration after living donor hepatectomy. Various biomarkers, especially liver function tests, are used to show liver regeneration. The aim of this study was to evaluate the course of liver regeneration following donor hepatectomy (LDH) by routine and regeneration-related biomarkers. Data from 63 living liver donors (LLDs) who underwent LDH in Inonu University Liver Transplant Institute were prospectively analyzed. Serum samples were obtained on the preoperative day and postoperative days (POD) 1, 3, 5, 10, and 21. Regenerative markers including alfa-fetoprotein (AFP), des carboxy prothrombin (DCP), ornithine decarboxylase (ODC), retinol-binding protein 4 (RBP4), and angiotensin-converting enzyme isotype II (ACEII) and liver function tests including alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP) and total bilirubin levels were all analyzed. The median age of the LLDs was 29.7 years and 28 LLDs were female. Eight LLDs developed postoperative complications requiring relaparotomy. The routine laboratory parameters including AST (<0.001), ALT (<0.001), ALP (<0.001), and total bilirubin (<0.001) showed a significant increase over time until postoperative day (POD) 3. For the regeneration-related parameters, except for the RBP4, all parameters including ACEII (p = 0.006), AFP (p = 0.002), DCP (p = 0.007), and ODC (p = 0.002) showed a significant increase in POD3. The regeneration parameters showed a different pattern of change. In right-lobe liver grafts, ACEII (p = 0.002), AFP (p = 0.035), and ODC (p = 0.001) showed a significant increase over time. DCP (p = 0.129) and RBP4 (p = 0.335) showed no significant changes in right-lobe liver grafts. Regenerative markers are increased in a sustained fashion following LDH. This is more prominent following right-lobe grafts which are indicative of progenitor-associated liver regeneration.

Practice patterns of the medical evaluation of living liver donors in the United States.

Living donor liver transplantation (LDLT) can help address the growing organ shortage in the United States, yet little is known about the current practice patterns in the medical evaluation of living liver donors. We conducted a 131-question survey of all 53 active LDLT transplant programs in the United States to assess current LDLT practices. The response rate was 100%. Donor acceptance rate was 0.33 with an interquartile range of 0.33-0.54 across all centers. Areas of high intercenter agreement included minimum age cutoff of 18 years (73.6%) and the exclusion of those with greater than Class 1 obesity (body mass index, 30.0-34.9 m/kg 2 ) (88.4%). Diabetes mellitus was not an absolute exclusion at most centers (61.5%). Selective liver biopsies were performed for steatosis or iron overload on imaging (67.9% and 62.3%, respectively) or for elevated liver enzymes (60.4%). Steatohepatitis is considered an exclusion at most centers (84.9%). The most common hypercoagulable tests performed were factor V Leiden (FVL) (88.5%), protein C (73.1%), protein S (71.2%), antithrombin III (71.2%) and prothrombin gene mutation (65.4%). At 41.5% of centers, donors were allowed to proceed with donation with FVL heterozygote status. Most programs discontinue oral contraceptive pills at least 28 days prior to surgery. At most centers, the need for cardiovascular ischemic risk testing is based on age (73.6%) and the presence of one or more cardiac risk factors (68.0%). Defining areas of practice consensus and variation underscores the need for data generation to develop evidence-based guidance for the evaluation and risk assessment of living liver donors.