活体肝移植进展(附视频)

1996年香港大学玛丽医院开展包含肝中静脉的活体肝移植,扩大了活体肝移植应用范围,全球活体肝移植逐渐增多。活体肝移植的开展能缓解尸体器官捐赠数不足时的肝移植需求。只要关注供者安全和受者预后,活体肝移植仍是目前终末期器官疾病患者一种可行的选择。活体肝移植的发展对移植和非移植肝脏手术均有贡献。     

活体右半供肝血管和胆管变异及重建处理

成人到成人的活体右半肝移植在东、西方国家已成为一种可以接受的治疗终末期肝病的有效措施。由于尸体供器官的缺乏以及肝移植适应证的扩大，供需矛盾愈来愈突出，在东方国家脑死亡供器官不被接受，这种矛盾更加明显，很多终末期肝病患者在等待肝源过程中死亡。成人间活体右半肝移植缩短了受体等待移植的时间，一定程度上缓解了器官短缺，尤其适用于急性肝功能衰竭患者，在一些国家甚至成为主要的供器官来源，例如在日本。1994年日本Yamaoka等成功开展了世界首例活体右半肝移植，但并非在成人间。1997年香港首先开展成人间活体右半肝移植，即活体扩大右半肝移植。自此，成人间活体右半肝移植在世界范围的各大移植中心广泛开展，但在手术技术上存在一些争论。现就成人间活体右半肝移植供肝血管及胆管解剖变异和在受体重建时的相应处理复习文献，并总结如下。     

供肝短缺形势下的我国肝移植策略

近5年来我国肝移植发展非常迅速,然而,供肝短缺成为制约临床肝移植发展的瓶颈。因此,拓展供肝来源成为目前肝移植临床的重点。活体肝移植在尸体供肝受限的情况下可以很好地扩展供肝来源,且活体供肝具有活力强、冷缺血时间短等优势;劈裂式肝移植可增加15％～28％的供肝数量,有望成为解决供肝短缺的主要手术方式之一;脑死亡供者在西方国家是移植器官的主要来源,在我国亦有广大的应用前景,但脑死亡供者器官移植刚刚起步,有许多问题亟待研究;此外,边缘供肝,包括脂肪变性肝脏、HBsAg阳性肝脏、超过60岁的高龄供者捐献的肝脏、冷缺血时间超过14h的盱脏等均可用以缓解日益突出的供肝短缺矛盾。     

活体肝移植的供肝处理技巧

目的 探讨活体肝移植术供肝的选择，切取和修整，方法 1997至2001年期间，第四军医大学西京医院共完成活体肝移植术3例。其中2例是儿童活体肝移植术，另1例是成人辅助性原位活体肝移植术，供肝切取均为左外叶，供者术中作必要的肝周韧带游离和肝门解剖，超声刀切取供肝，不阻断肝脏血流。结果 供者手术时间为5-6.5h，失血量为200-400ml，无并发症发生。目前所有的供者肝功能均正常。恢复正常的工作和生活。结论 左肝外叶切除对供者是非常安全的。一般无手术并发症发生。     

细胞治疗在肝脏常温机械灌注中的应用

肝移植是目前终末期肝病治疗的最佳选择[1],但器官短缺导致超过11％的患者因肝脏失代偿和死亡而失去移植机会[2].因此人们尝试使用边缘供肝、活体供肝、劈离肝或通过改善边缘供肝进行移植,从而增加可用的肝移植数量[2-3].     

成人间活体肝移植体会：附3例报告

目的总结和分析成人间活体肝移植(LDLT)的临床经验。方法对2007年2月—2007年7月的3例成人间活体肝移植的临床资料进行回顾性分析。结果供体为供体右半肝(不带肝中静脉)1例,供体扩大左半肝(带肝中静脉、尾状叶)2例,GV/SLV均≥40%。3对供者及患者术后均恢复良好,无小肝综合征发生,均未出现严重并发症。术后左半肝供者较右半肝供者肝功能恢复更快。结论如左半肝GV/SLV≥40%,可优先选择左半肝作为供肝;胆道重建不必放置胆管引流管;成人间LDLT是治疗终末期肝病的安全有效的手段。     

边缘供肝面临的机遇与挑战

随着手术技术和术后免疫抑制治疗的不断突破与成熟,肝移植受者和移植物存活率显著提高,供肝短缺已成为限制肝移植临床发展的主要阻碍,如何扩大供肝来源也成为了当前迫切需要解决的问题。高龄供肝、脂肪变性供肝、病毒性肝炎供肝、心脏死亡器官捐献供肝等常见边缘供肝在临床肝移植中的使用已经取得了一定的突破性进展,但边缘供肝的使用仍存在较多限制。因此,本文对边缘供肝的定义,几种常见边缘供肝的应用及研究进展进行综述,探讨目前边缘供肝面临的机遇与挑战,旨在为临床肝移植供者池的扩大提供参考,造福更多终末期肝病患者。     

亲属活体供肝移植治疗儿童终末期肝病六例

目的 探讨亲属活体供肝移植(LDLT)治疗儿童终末期肝病的效果,并总结治疗经验.方法 2005年9月至2007年1月对6例终末期肝病患儿进行了LDLT.6例患者中,原发病为肝内外胆管弥漫性囊性扩张症Ⅳ型伴肝硬化1例、肝豆状核变性2例、门静脉海绵样变性3例;供者为患儿的母亲3例、父亲2例及舅父1例,分别切取供者的右半肝1例和左半肝5例作为供肝;在切除受者全部病肝和保留下腔静脉后,对受者施行部分供肝的原位肝移植.术后依据供、受者的临床表现、血液学指标和影像学检查,对活体供肝移植的治疗效果进行评价.结果 术后对供、受者随访了6～21个月.6例供者均健康存活,未发生并发症.6例受者中,1例于术后第4天死于门静脉血栓形成,1例于术后5个月时死于肝内静脉血栓形成,其余4例均长期健康存活.结论 亲属活体供肝移植是治疗儿童终末期肝病的有效方法.术前进行仔细的供、受者选择和完善的影像学检查,术中应用精确的手术技术,术后给予严格的管理是儿童LDLT成功的关键.     

活体肝移植中小肝综合征的定义和研究进展

肝移植是治疗终末期肝病的有效手段。自1963年美国人Starzl施行第1例人体原位肝移植以来,随着肝移植技术的不断发展和提高,越来越多的终末期肝病患者的生命得以挽救。然而,尸体供肝来源紧缺一直是制约肝移植发展的瓶颈。部分原位肝移植包括尸体劈离式肝移植和活体肝移植的开展在一定程度上缓解了尸体供肝短缺的问题,但仍     

重视活体肝移植围手术期评估

20世纪末活体肝移植应运而生，目的是为了解决尸体供肝短缺的难题。由于其供肝质量的可保证性和手术时机的可选择性，活体肝移植为众多终末期肝病患者点燃了新的希望明灯。迄今全球已完成活体肝移植14000余例。进入21世纪，中国成人活体部分肝移植得到快速发展，在外科技术层面也取得若干重大进步，移植疗效不断提高。然而，移植界尚未形成科学规范的肝移植供受者评估体系来指引我国肝移植事业的健康发展。     

Hepatic grafts from live donors: donor morbidity for 470 cases of live donation

Living donor-morbidity was evaluated in 470 consecutive cases of living donor liver transplantation carried out from June 1990 to May 1999 at Kyoto University. Grafting was categorized into 4 groups according to the resection lines; left lateral segmentectomy (S2 + 3, n = 282, R1), extended left lateral segmentectomy without middle hepatic vein (MHV) (S2 + 3 + part4, n = 45, R2), left lobectomy with MHV (S2 + 3 + 4, n = 99, R3) and right lobectomy without MHV (S5 + 6 + 7 + 8, n = 43, R4). Intraoperative blood loss and operation duration were less for left lateral segmentectomy, but no significant difference was observed between left lobectomy and right lobectomy. The length of postoperative hospital stays was comparable among all groups except for the group with right lobe grafting. The AST values at the peak and at POD 7 were significantly elevated for right lobectomy, but the AST value normalized within one month in the majority of the cases. The close follow-up of donors with more than 1000 ml intraoperative bleeding, and of those donors who stayed in hospital for more than 30 days, the close follow-up, furthermore, of those donors with AST values higher than 100 IU/L AST after one month, revealed complete recovery. Biliary leakage was the most common and annoying complication after donor operations, especially in for right lobe grafting, but all donors recovered completely with conservative or minimal invasive therapy. The two cases of re-operation due to adhesive mechanical ileus we encountered were resolved completely. Finally, no donor-operation related death was noted. In conclusion, the morbidity of living donors is low or minimal even for right lobectomy, the most extended procedure, and complete recovery can be expected in all cases. Received: 24 November 1999/Accepted: 13 March 2000     

Outcomes of Donor Evaluations for Adult-to-Adult Right Hepatic Lobe Living Donor Liver Transplantation

The purpose of this study is to determine the role of liver biopsy and outcome of patients undergoing donor evaluation for adult-to-adult right hepatic lobe living donor liver transplantation (LDLT). Records of patients presenting for a comprehensive donor evaluation between 1997 and February 2005 were reviewed. Liver biopsy was performed only in patients with risk factors for abnormal histology. Two hundred and sixty patients underwent a comprehensive donor evaluation and 116 of 260 (45%) were suitable for donation, 14 of 260 (5.4%) did not complete evaluation and 130 of 260 (50%) were rejected. Four patients underwent unsuccessful hepatectomy surgery due to discovery of intraoperative abnormalities. Between 1997 and 2001, the acceptance rate of donor candidates (63%) was higher than 2002-2005 (36%), p < 0.0001. Sixty-six of the 150 eligible patients (44%) fulfilled criteria for liver biopsy and 28 of 66 (42%) had an abnormal finding. Less than half of the patients undergoing donor evaluation were suitable donors and the donor acceptance rate has declined over time. A large proportion of the patients undergoing liver biopsy have abnormal findings. Our evaluation process failed to identify 4 of 103 who had aborted donor surgeries.     

Adult Right-Lobe Living Liver Donors: Quality of Life, Attitudes and Predictors of Donor Outcomes

To refine selection criteria for adult living liver donors and improve donor quality of care, risk factors for poor postdonation health-related quality of life (HRQOL) must be identified. This cross-sectional study examined donors who underwent a right hepatectomy at the University of Toronto between 2000 and 2007 (n = 143), and investigated predictors of (1) physical and mental health postdonation, as well as (2) willingness to participate in the donor process again. Participants completed a standardized HRQOL measure (SF-36) and measures of the pre- and postdonation process. Donor scores on the SF-36 physical and mental health indices were equivalent to, or greater than, population norms. Greater predonation concerns, a psychiatric diagnosis and a graduate degree were associated with lower mental health postdonation whereas older donors reported better mental health. The majority of donors (80%) stated they would donate again but those who perceived that their recipient engaged in risky health behaviors were more hesitant. Prospective donors with risk factors for lower postdonation satisfaction and mental health may require more extensive predonation counseling and postdonation psychosocial follow-up. Risk factors identified in this study should be prospectively evaluated in future research.     

Adult Living Liver Donors have Excellent Long‐Term Medical Outcomes: The University of Toronto Liver Transplant Experience

Right lobe living donor liver transplantation is an effective treatment for selected individuals with end‐stage liver disease. Although 1 year donor morbidity and mortality have been reported, little is known about outcomes beyond 1 year. Our objective was to analyze the outcomes of the first 202 consecutive donors performed at our center with a minimum follow‐up of 12 months (range 12–96 months). All physical complications were prospectively recorded and categorized according to the modified Clavien classification system. Donors were seen by a dedicated family physician at 2 weeks, 1, 3 and 12 months postoperatively and yearly thereafter. The cohort included 108 males and 94 females (mean age 37.3 ± 11.5 years). Donor survival was 100%. A total of 39.6% of donors experienced a medical complication during the first year after surgery (21 Grade 1, 27 Grade 2, 32 Grade 3). After 1 year, three donors experienced a medical complication (1 Grade 1, 1 Grade 2, 1 Grade 3). All donors returned to predonation employment or studies although four donors (2%) experienced a psychiatric complication. This prospective study suggests that living liver donation can be performed safely without any serious late medical complications and suggests that long‐term follow‐up may contribute to favorable donor outcomes.     

Tailoring the Type of Donor Hepatectomy for Adult Living Donor Liver Transplantation

Donor hepatectomies for adult living donor liver transplantations were performed in 200 consecutive donors to harvest a left liver (LL) graft (n = 5), a LL plus caudate lobe (LL + CL) graft (n = 63), a right liver (RL) graft (n = 86), a RL and middle hepatic vein (RL + MHV) graft (n = 28) or a right lateral sector (RLS) graft (n = 18). The graft type was selected so that at least 40% of the recipient's standard liver volume was harvested. No donor deaths occurred, and no significant differences in the morbidity rates among either donors or recipients were observed when the outcomes were stratified according to the graft type. Donors who donated RL exhibited higher values of serum total bilirubin and prothrombin time than those who donated non-RL (LL, LL + CL, RLS) grafts. The time taken for hilar dissection and parenchymal transection increased in the following order: RLS graft, LL graft and RL graft harvesting. In conclusion, non-RL grafting was more time consuming, but the hepatic functional loss in the donors was smaller. Our graft selection criteria were useful for reducing the use of RL grafts with acceptable morbidity in both donors and recipients.     

Discontinuation of Living Donor Liver Transplantation for PSC Due to Histological Abnormalities in Intraoperative Donor Liver Biopsy

Liver transplantation is the only curative treatment known to date for end-stage liver disease occurring as a result of primary sclerosing cholangitis (PSC). Here, we report a case in which living donor liver transplantation (LDLT) for PSC was cancelled because of histological abnormalities in intraoperative biopsy of the donor liver. The donor was the mother of the recipient, and her preoperative evaluation revealed no abnormalities. In the donor operation, the donor liver biopsy revealed expansion of the portal zone with lymphocytic infiltration and dense concentric fibrosis developed around a bile duct. These histological findings were identical to those of early-stage PSC; therefore, the LDLT was called off. The experience in this case suggests that preoperative liver biopsy may be useful to exclude first-degree relative donors with potential PSC prior to LDLT for PSC.     

A Comparison of Surgical Outcomes and Quality of Life Surveys in Right Lobe vs. Left Lateral Segment Liver Donors

Concern remains regarding the possibly higher risk to living liver donors of the right lobe (RL), as compared with the left lateral segment (LLS). We studied outcomes and responses to quality of life (QOL) surveys in the two groups.
From 1997 to 2004, we performed 49 living donor liver transplants (LDLTs): 33 RL and 16 LLS. Notable differences included a higher proportion of female and unrelated donors in the RL group. A significantly larger liver mass was resected in RL (vs. LLS) donors: 720 (vs. 310) g, p = 0.01; RL donors also had greater blood loss (398 vs. 240 mL, p = 0.04) and operative times (7.2 vs. 5.7 h, p = 0.05). However, those findings did not translate into significant differences in donor morbidity. The complication rate was 12.5% in LLS donors and 9.1% in RL donors (p = ns). Per a QOL survey at 6 months postdonation, no significant differences were noted in SF-12 scores for the two groups. Recovery times were somewhat longer for RL donors. Mean time off work was 61.0 days for RL donors and 32.4 days for LLS donors (p = 0.004).
RL donation is associated with greater operative stress for donors, but not necessarily with a more complicated recovery or differences in QOL.     

活体肝移植不同供肝切取方式对残肝再生的影响

目的 探讨活体肝移植不同方式供肝切取术后供者康复及肝脏再生情况.方法 回顾性分析2006年5月至2011年5月13例活体肝移植供者临床资料.对不同方式供肝切取手术方法、供者术后肝功能指标变化及残肝再生情况进行比较.结果 供者手术分为不包含肝中静脉右半肝切除8例,包含肝中静脉右半肝切除2例,左半肝切除3例.供者肝功能及凝血指标均于术后两周恢复正常,术后未见严重并发症,随访情况良好,无供者死亡.术前CT估算供肝体积与术中实际切取供肝重量呈正相关(r＝0.838,P＜0.01).术后复查CT测残肝体积示:右半肝供者残肝较左半肝供者残肝再生速度快,不带肝中静脉右半肝供者较带肝中静脉右半肝供者残肝再生速度略高,但供者肝脏功能恢复无明显差异.结论 不同术式活体肝移植供者在规范化围手术期处理、精细手术操作后肝功能均能得到较好的康复,而供肝切取术后残肝再生速度则受切取比例、残肝供血情况、细胞因子调控等多因素影响.     

Guidelines for donor selection and an overview of the donor operation in living related liver transplantation

Guidelines for donor selection and an overview of the donor operation are reported on the basis of our experience with 120 cases of living related liver transplantation (LRLT) in pediatric patients. Once the parents had clearly expressed their desire to serve as donors, tests were performed to functionally and anatomically screen the donor livers to determine whether or not the parents' general physical condition allowed them to serve as donors. We then evaluated which of the two parental candidates was more suitable as a donor. The wishes of the family as to which parent should serve as donor was considered secondary and taken into account only in a few cases in which certain functional and/or anatomical abnormalities were uncovered that made the prime candidate less suitable. For the 120 LRLTs, 135 candidates were evaluated as potential donors, 15 (11.1%) of whom were rejected for various reasons. The mean volume of blood loss during the donor operation decreased significantly from 489 g in the first 60 LRLTs to 390 g in the latter 60 LRLTs; this was accompanied by a significant decrease in the mean volume of autologous blood transfused from 449 g to 390 g. Mean cold ischemia time of the graft increased significantly from 71.4 to 128.0 min, while mean operation time conversely decreased from 6.7 to 6.2 h. Bile leakage from the cut surface of the remnant lver, which was the only postoperative surgical complication encountered, was noted in five cases. We conclude that donor candidates should be strictly selected according to basic guidelines, taking into account both the results of preoperative screening and the wishes of the family. With this accumuled experience, we have been able to simplify our LRLT operative procedure, resulting in decreases in blood loss volume, blood transfused, and operation time.     

Medical-record review of potential donor pool in the Czech Republic suggests a possible increase to more than double the number of donors

The objective of this study was the investigation of the maximal potential donor pool and causes of non-realized organ donation. On-site retrospective medical-record review was performed for all cases of patient death ( n=1608) occurring in 1999 at 34 (83% of all) intensive care units (ICUs) in the region of the transplant center in Prague, Czech Republic. Two hundred and eighty-eight (18%) patients died with clinical signs of brain death. ICU physicians considered 111 of them as being potential donors at the time; 63 became donors and 48 did not. The remaining 177 patients with clinical signs of brain death were, in retrospect, assessed as being unsuitable ( n=105) or suitable ( n=72) for donation. The maximal potential donor rate was 55.7 per million population (pmp), with a more conservative estimate of 37.4 pmp. The actual donor rate was 18.1 pmp. For the maximal level to be approached, further educational efforts are warranted, targeting ICU physicians and concentrating on the identification of potential donors.