BACKGROUND: Inevitable warm ischemia time before organ procurement aggravates posttransplantation ischemia- reperfusion injury. Endoplasmic reticulum (ER) stress is involved in ischemia-reperfusion injury, but its ...BACKGROUND: Inevitable warm ischemia time before organ procurement aggravates posttransplantation ischemia- reperfusion injury. Endoplasmic reticulum (ER) stress is involved in ischemia-reperfusion injury, but its role in donation after cardiac death (DCD) liver transplantation is not clear and the effect of ER stress inhibitors, tauroursodeoxycholic acid (TUDCA) and 4-phenyl butyric acid (PBA), on the prognosis of recipient of DCD liver transplantation remains unclear. METHODS: Male Sprague-Dawley rats (8-10 weeks) were randomly divided into control group: liver grafts without warm ischemia were implanted; DCD group: warm ischemia time of the liver grafts was 60 minutes; TUDCA and PBA groups: based on the DCD group, donors were intraperitoneally injected with TUDCA or PBA 30 minutes before the organ procurements. Serum aminotransferase levels, oxidative stress activation and expression of ER stress signal molecules were evaluated. Pathological examinations were performed. The survivals of the recipients in each group were compared for 14 days.RESULTS: Compared with the control group, DCD rats had significantly higher levels of serum aminotransferase at 6 hours, 1 day and 3 days after operation (P〈0.01, 0.01 and 0.05, respectively) and oxidative indices (P〈0.01 for both malondialdehyde and 8-hydroxy deoxyguanosine), more severe liver damage (P〈0.01) and up-regulated ER stress signal expressions (P〈0.01 for GRP78, phos-eIF2al, CHOP, ATF-4, ATF-6, PERK, XBP-1 and pro-caspase-12). All recipients died within 3 days after liver transplantation. Administration of TUDCA or PBA significantly decreased aminotransferase levels (P〈0.05), increased superoxide dismutase activities (P〈0.01), alleviated liver damage (P〈0.01), down-regulated ER stress signal expressions (P〈0.01) and improved postoperative survivals (P〈0.01). CONCLUSIONS: ER stress was involved with DCD liver trans- plantation in rats. Preoperative intraperitoneally injection of TUDCA or PBA protected ER stress and improved prognosis.展开更多
AIM To describe the prevalence of posttransplant metabolic syndrome(PTMS) after donation after cardiac death(DCD) liver transplantation(LT) and the pre-and postoperative risk factors.METHODS One hundred and forty-seve...AIM To describe the prevalence of posttransplant metabolic syndrome(PTMS) after donation after cardiac death(DCD) liver transplantation(LT) and the pre-and postoperative risk factors.METHODS One hundred and forty-seven subjects who underwent DCD LT from January 2012 to February 2016 were enrolled in this study. The demographics and the clinical characteristics of pre-and post-transplantation were collected for both recipients and donors. PTMS was defined according to the 2004 Adult Treatment Panel-Ⅲ criteria. All subjects were followed monthly for the initial 6 mo after discharge, and then, every 3 mo for 2 years. The subjects were followed every 6 mo or as required after 2 years post-LT.RESULTS The prevalence of PTMS after DCD donor orthotopic LT was 20/147(13.6%). Recipient's body mass index(P = 0.024), warm ischemia time(WIT)(P = 0.045), and posttransplant hyperuricemia(P = 0.001) were significantly associated with PTMS. The change in serum uric acid levels in PTMS patients was significantly higher than that in non-PTMS patients(P < 0.001). After the 1 s t mo, the level of serum uric acid of PTMS patients rose continually over a period, while it was unaltered in non-PTMS patients. After transplantation, the level of serum uric acid in PTMS patients was not associated with renal function.CONCLUSION PTMS could occur at early stage after DCD LT with growing morbidity with the passage of time. WIT and post-LT hyperuricemia are associated with the prevalence of PTMS. An increased serum uric acid level is highly associated with PTMS and could act as a serum marker in this disease.展开更多
Donation after circulatory-determined death(DCD)is an important part of renal transplantation.Therefore,DCD renal transplantation animal model should be established to study the mechanism of organ injury.Here,we estab...Donation after circulatory-determined death(DCD)is an important part of renal transplantation.Therefore,DCD renal transplantation animal model should be established to study the mechanism of organ injury.Here,we established a stable DCD rat renal transplantation model and investigated the dynamic regulation of graft self-repairing and antioxidant capacities with different non-heart-beating times(NHBTs).Male Sprague-Dawley rats were randomly divided into four groups with the NHBT of the donors from 0 to 15,30,and 45 minutes.Recipients in long NHBT groups had a significantly lower survival rate and poorer graft function than those in short NHBT groups.Grafts from the 15-minute and 30-minute NHBT groups showed light and severe injury respectively at an early stage after transplantation and recovered within 7 days after transplantation,whereas the self-repairing of the grafts in the 45-minute NHBT group was delayed.The expressions of proliferating cell nuclear antigen(PCNA)and von Willebrand factor(vWF)were dependent on NHBT.The expression of antioxidant proteins paralleled graft recovery.In conclusion,the recipients can up-regulate antioxidant capacity to enhance graft self-repairing in DCD renal transplantation.Prolonged NHBT can delay the self-repairing and antioxidation of grafts.展开更多
AIM To investigate blood cultures of deceased donors and report the confirmed transmission of bacterial infection from donors to liver recipients.METHODS We retrospectively studied the results of blood cultures among ...AIM To investigate blood cultures of deceased donors and report the confirmed transmission of bacterial infection from donors to liver recipients.METHODS We retrospectively studied the results of blood cultures among our donation after cardiac death(DCD) donors and calculated the donor-derived bacterial infection rates among liver recipients. Study participants underwent liver transplantation between January 1, 2010 and February 1, 2017. The study involved a total of 67 recipients of liver grafts from 67 DCD donors. We extracted the data of donors' and patients' characteristics, culture results and clinical outcomes, especially the post-transplant complications in liver recipients, from electronic medical records. We analyzed the characteristics of the donors and the corresponding liver recipients with emphasis put on donor-derived infections.RESULTS Head trauma was the most common origin of death among our 67 DCD donors(46.3%). Blood taken prior to the procurement operation was cultured for 53 of the donors, with 17 episodes of bloodstream infections developing from 13 donors. The predominant organism isolated from the blood of donors was Gram-positive bacteria(70.6%). Only three(4.5%) of 67 liver recipients developed confirmed donor-derived bacterial infections,with two isolates of multidrug-resistant Klebsiella pneumoniae and one isolate of multidrug-resistant Enterobacter aerogenes. The liver recipients with donorderived infections showed relation to higher crude mortality and graft loss rates(33.3% each) within 3 mo post transplantation, as compared to those without donor-derived infections(9.4% and 4.7%, respectively). All three liver recipients received appropriate antimicrobial therapy.CONCLUSION Liver recipients have high occurrence of donor-derived infections. The liver recipients with donor-derived multidrug-resistant Enterobacteriaceae infections can have good outcome if appropriate antimicrobial therapy is given.展开更多
There is continuing disparity between demand for and supply of kidneys for transplantation. This review describes the current state of kidney donation after cardiac death(DCD) and provides recommendations for a way fo...There is continuing disparity between demand for and supply of kidneys for transplantation. This review describes the current state of kidney donation after cardiac death(DCD) and provides recommendations for a way forward. The conversion rate for potential DCD donors varies from 40%-80%. Compared to controlled DCD, uncontrolled DCD is more labour intensive, has a lower conversion rate and a higher discard rate. The super-rapid laparotomy technique involving direct aortic cannulation is preferred over in situ perfusion in controlled DCD donation and is associated with lower kidney discard rates, shorter warm ischaemia times and higher graft survival rates. DCD kidneys showed a 5.73-fold increase in the incidence of delayed graft function(DGF) and a higher primary non function rate compared to donation after brain death kidneys, but the long term graft function is equivalent between the two. The cold ischaemia time is a controllable factor that significantly influences the outcome of allografts, for example, limiting it to < 12 h markedly reduces DGF. DCD kidneys from donors < 50 function like standard criteria kidneys and should be viewed as such. As the majority of DCD kidneys are from controlled donation, incorporation of uncontrolled donation will expand the donor pool. Efforts to maximise the supply of kidneys from DCD include: implementing organ recovery from emergency department setting; improving familyconsent rate; utilising technological developments to optimise organs either prior to recovery from donors or during storage; improving organ allocation to ensure best utility; and improving viability testing to reduce primary non function.展开更多
The scarcity of donor livers has increased the interest in donation after cardiac death(DCD) as an additional pool to expand the availability of organs. However, the initial results of liver transplantation with DCD g...The scarcity of donor livers has increased the interest in donation after cardiac death(DCD) as an additional pool to expand the availability of organs. However, the initial results of liver transplantation with DCD grafts have been suboptimal due to an increased rate of complications, as well as decreased graft survival. These challenges have led to many developments in DCD donation outcome, as well as basic and translational research. In this article we review the unique characteristics of DCD donors, nuances of DCD organ procurement, the effect of prolonged warm and cold ischemia times, and discuss major studies that compared DCD to donation after brain death liver transplantation, in terms of outcomes and complications. We also review the different methods of donor treatment that has been applied to ameliorate DCD organ outcome, and we discuss the role of machine perfusion techniques in organ reconditioning. We discuss the two major perfusionmodels, namely, hypothermic machine perfusion and normothermic machine perfusion; we compare both methods, and delineate their major differences.展开更多
The standard approach to organ preservation in liver transplantation is by static cold storage and the time between the cross-clamping of a graft in a donor and its reperfusion in the recipient is defined as cold isch...The standard approach to organ preservation in liver transplantation is by static cold storage and the time between the cross-clamping of a graft in a donor and its reperfusion in the recipient is defined as cold ischemia time(CIT).This simple definition reveals a multifactorial time frame that depends on donor hepatectomy time,transit time,and recipient surgery time,and is one of the most important donor-related risk factors which may influence the graft and recipient’s survival.Recently,the growing demand for the use of marginal liver grafts has prompted scientific exploration to analyze ischemia time factors and develop different organ preservation strategies.This review details the CIT definition and analyzes its different factors.It also explores the most recent strategies developed to implement each timestamp of CIT and to protect the graft from ischemic injury.展开更多
The procurement process for organ donation begins with the identification of potential organ donors in emergency or critical care units(CCU),followed by their clinical evaluation,diagnostic procedures,and therapeutic ...The procurement process for organ donation begins with the identification of potential organ donors in emergency or critical care units(CCU),followed by their clinical evaluation,diagnostic procedures,and therapeutic interventions,mostly conducted in CCUs.It concludes with the request for organ donation and,if accepted,the retrieval of organs.Despite most interventions occurring in detection units,there has been a neglect of the strategic role played by critical care specialists(CCS)in managing and caring for brain-dead or near-brain-death patients.Questions arise:Are they willing to undertake this responsibility?Do they fully comprehend the nature of organ procurement?Are they aware of the specific interventions required to maintain possible organ donors in optimal physiological condition?Our objective is to examine the role of CCS in organ procurement and propose ways to enhance it,ultimately aiming to increase and enhance organ donation rates.展开更多
Introduction: Worldwide, End Stage Renal Disease (ESRD) is one of the leading disease with prolong morbidity. Kidney transplantation offers the best solution for the problem. The shortage of donor kidney is even bigge...Introduction: Worldwide, End Stage Renal Disease (ESRD) is one of the leading disease with prolong morbidity. Kidney transplantation offers the best solution for the problem. The shortage of donor kidney is even bigger problem due to transplantation being one of the routine procedures. The use of deceased donor definitely increases the pool of donor with excellent immediate and long-term follow-up proven results. Aim: The aim is to analyze and summarize the outcome of Kidney transplantation. Methods & Materials: A total of 78 cases of Kidney Transplantation were selected for the study and categorized as: Group I—41 (living Donor), Group II—23 (DCD) & Group III—15 (DBD). Perspective study was done with clean data recorded & maintained pre-operatively, post-operatively and follow-up from Jan 2011 to Dec 2015 in our hospital. Post-operative graft status, complications and at least 1-year follow-up were area of main focus. Results: All patients underwent successful kidney transplantation. In Group I, the number of living donor kidney transplantation is 41 whereas in Group II (DCD) & III (DBD), the number of deceased donor transplantation is 23 and 15 respectively. The Normal functioning of graft (NGF) was 38 (87.8%), 16 (69.6%) & 11 (73.3%) in Group I, II & III respectively along with Poor Graft function (PGF) in Group I—4 (9.7%), II—5 (21.7%) & III—2 (13.3%) managed by continuing dialysis. Delayed graft function (DGF) was noted I-1 (2.4%), II-2 (8.6%) & III-1 (6.6%) in respective group, which returned to normal function post intervention. Therefore, 1<sup>st</sup> year graft survival was >93% [(Group I (97.6%), Group II (95.6%) & Group III (93.3%) respectively]. Manageable surgical complication were found in Group I—8 (19.5%), Group II—5 (21.7%) & Group III—2 (13.3%) like hematoma, hydronephrosis, leakage except one emboli related nephrectomy of transplanted kidney & one pneumonia led death in Group II. The overall survival was greater than 90% [(Group I (97.6%), Group II (91.3%) & Group III (93.3%) respectively] in all three groups after at least 1-year follow-up study, which was an excellent prognosis. Conclusion: Kidney Transplantation is safe, effective and the best method of treatment for ESRD. Significant improvement in quality of life is the hallmark merit over dialysis. Paired donation program should be encouraged in order to overcome shortage of kidney, which increases living donor pool. Outcome in living donor Kidney transplantation is always better than deceased donor transplantation. The prognosis of deceased donor transplantation (1 year Graft survival > 93% & 1 year patient survival > 90%) is also satisfactory with promising results. Therefore all the results were under acceptable standard limit. Thus, kidney transplantation (live or deceased donor) should be encouraged as primary modalities in the treatment of End Stage Renal Disease (ESRD).展开更多
目的:比较亲属活体供肾与心脏死亡器官捐献(donation after cardiac death,DCD)供肾肾移植的临床效果。方法:回顾性分析2011-04~2018-01兰州大学第二医院肾移植科同期完成的45例亲属活体供肾(亲属活体供肾组)和21例DCD供肾肾移植受者(...目的:比较亲属活体供肾与心脏死亡器官捐献(donation after cardiac death,DCD)供肾肾移植的临床效果。方法:回顾性分析2011-04~2018-01兰州大学第二医院肾移植科同期完成的45例亲属活体供肾(亲属活体供肾组)和21例DCD供肾肾移植受者(DCD供肾组)的临床资料,比较两组患者移植肾一般情况、肾功能、人肾累积存活率及并发症情况。结果:两组患者性别、BMI、手术时间、住院时长比较,差异无统计学意义(P>0.05),供、受者年龄和透析时间比较,差异有显著统计学意义(P<0.01)。亲属活体供肾组和DCD供肾组受者急性排斥反应分别发生2例(4.4%)和6例(28.6%),两组间差异有统计学意义(P<0.05);移植肾功能延迟恢复分别发生1例(2.2%)和2例(9.5%),两组间差异无统计学意义(P>0.05)。术后1周两组患者血肌酐比较,差异均有统计学意义,且术后患者血肌酐恢复至正常的时间比较,差异有统计学意义(P<0.05或P<0.01);术后2周、1个月、2个月两组患者血肌酐差异均无统计学意义。两组整个随访期的人、肾累积存活率比较,差异无统计学意义。结论:亲属活体供肾与DCD供肾肾移植早期效果类似,活体肾移植在移植肾术后急性排斥反应及肾功能短期恢复方面具有一定优势,但随访期间的人、肾累积存活率相同。展开更多
目的探讨心脏死亡供体器官捐献(donation after cardiac death,DCD)来源角膜植片行穿透性角膜移植后角膜内皮细胞变异情况.方法用角膜内皮显微镜对心脏死亡供体来源角膜植片行穿透性角膜移植191例眼术后角膜植片分别于术后1~4周;5~12周;...目的探讨心脏死亡供体器官捐献(donation after cardiac death,DCD)来源角膜植片行穿透性角膜移植后角膜内皮细胞变异情况.方法用角膜内皮显微镜对心脏死亡供体来源角膜植片行穿透性角膜移植191例眼术后角膜植片分别于术后1~4周;5~12周;4~6月;7~12月行角膜内皮镜检查.结果 (1)191例患者中有48例患者角膜内皮镜检出,143例患者角膜内皮镜无法检出,检出率占25%;(2)48例患者术后1~4周、2~3月、4~6月及7~12月的内皮细胞细胞密度(2271.15±321.47)个/mm^2、(1971.33±358.18)个/mm^2、(1826.59±303.92)个/mm^2、及(1753.14±306.31)个/mm^2.平均细胞面积由术前的(388.45±95.26)μm增加到术后7~12月的(638.63±124.73),细胞大小变异系数(cv值)由30.15%增加到65.04%,六角形细胞比例由(52.59±7.26)%下降到(40.01±11.35)%.结论 (1)角膜内皮镜检查对于早期角膜移植术后患者内皮细胞识别率较低,敏感度差,角膜移植术后早期内皮镜无法测出结果时可选择共焦显微镜评价观察角膜内皮细胞的变化;(2)穿透性角膜移植术后供眼角膜内皮细胞密度逐渐减少,六角形细胞比例渐变小平均细胞面积和cv值均渐增大.(3)DCD角膜移植术后1 a,尤其是术后3月应加强术后随访,当发现有早期排斥反应的征象时,及时进行抗排斥治疗对于减少早期排斥反应尤为重要.展开更多
基金supported by a grant from the National Natural Science Foundation of China (81273262)
文摘BACKGROUND: Inevitable warm ischemia time before organ procurement aggravates posttransplantation ischemia- reperfusion injury. Endoplasmic reticulum (ER) stress is involved in ischemia-reperfusion injury, but its role in donation after cardiac death (DCD) liver transplantation is not clear and the effect of ER stress inhibitors, tauroursodeoxycholic acid (TUDCA) and 4-phenyl butyric acid (PBA), on the prognosis of recipient of DCD liver transplantation remains unclear. METHODS: Male Sprague-Dawley rats (8-10 weeks) were randomly divided into control group: liver grafts without warm ischemia were implanted; DCD group: warm ischemia time of the liver grafts was 60 minutes; TUDCA and PBA groups: based on the DCD group, donors were intraperitoneally injected with TUDCA or PBA 30 minutes before the organ procurements. Serum aminotransferase levels, oxidative stress activation and expression of ER stress signal molecules were evaluated. Pathological examinations were performed. The survivals of the recipients in each group were compared for 14 days.RESULTS: Compared with the control group, DCD rats had significantly higher levels of serum aminotransferase at 6 hours, 1 day and 3 days after operation (P〈0.01, 0.01 and 0.05, respectively) and oxidative indices (P〈0.01 for both malondialdehyde and 8-hydroxy deoxyguanosine), more severe liver damage (P〈0.01) and up-regulated ER stress signal expressions (P〈0.01 for GRP78, phos-eIF2al, CHOP, ATF-4, ATF-6, PERK, XBP-1 and pro-caspase-12). All recipients died within 3 days after liver transplantation. Administration of TUDCA or PBA significantly decreased aminotransferase levels (P〈0.05), increased superoxide dismutase activities (P〈0.01), alleviated liver damage (P〈0.01), down-regulated ER stress signal expressions (P〈0.01) and improved postoperative survivals (P〈0.01). CONCLUSIONS: ER stress was involved with DCD liver trans- plantation in rats. Preoperative intraperitoneally injection of TUDCA or PBA protected ER stress and improved prognosis.
基金the National Natural Science Foundation,No.81270521(to Wang B)
文摘AIM To describe the prevalence of posttransplant metabolic syndrome(PTMS) after donation after cardiac death(DCD) liver transplantation(LT) and the pre-and postoperative risk factors.METHODS One hundred and forty-seven subjects who underwent DCD LT from January 2012 to February 2016 were enrolled in this study. The demographics and the clinical characteristics of pre-and post-transplantation were collected for both recipients and donors. PTMS was defined according to the 2004 Adult Treatment Panel-Ⅲ criteria. All subjects were followed monthly for the initial 6 mo after discharge, and then, every 3 mo for 2 years. The subjects were followed every 6 mo or as required after 2 years post-LT.RESULTS The prevalence of PTMS after DCD donor orthotopic LT was 20/147(13.6%). Recipient's body mass index(P = 0.024), warm ischemia time(WIT)(P = 0.045), and posttransplant hyperuricemia(P = 0.001) were significantly associated with PTMS. The change in serum uric acid levels in PTMS patients was significantly higher than that in non-PTMS patients(P < 0.001). After the 1 s t mo, the level of serum uric acid of PTMS patients rose continually over a period, while it was unaltered in non-PTMS patients. After transplantation, the level of serum uric acid in PTMS patients was not associated with renal function.CONCLUSION PTMS could occur at early stage after DCD LT with growing morbidity with the passage of time. WIT and post-LT hyperuricemia are associated with the prevalence of PTMS. An increased serum uric acid level is highly associated with PTMS and could act as a serum marker in this disease.
基金supported by funds from the National Natural Science Foundation of China(Grant No.81570613 and No.81370853)Jiangsu Provincial Social Development Project(Grant No.BE2017615)2016 Jiangsu Provincial Medical Innovation Team(Grant No.0536).
文摘Donation after circulatory-determined death(DCD)is an important part of renal transplantation.Therefore,DCD renal transplantation animal model should be established to study the mechanism of organ injury.Here,we established a stable DCD rat renal transplantation model and investigated the dynamic regulation of graft self-repairing and antioxidant capacities with different non-heart-beating times(NHBTs).Male Sprague-Dawley rats were randomly divided into four groups with the NHBT of the donors from 0 to 15,30,and 45 minutes.Recipients in long NHBT groups had a significantly lower survival rate and poorer graft function than those in short NHBT groups.Grafts from the 15-minute and 30-minute NHBT groups showed light and severe injury respectively at an early stage after transplantation and recovered within 7 days after transplantation,whereas the self-repairing of the grafts in the 45-minute NHBT group was delayed.The expressions of proliferating cell nuclear antigen(PCNA)and von Willebrand factor(vWF)were dependent on NHBT.The expression of antioxidant proteins paralleled graft recovery.In conclusion,the recipients can up-regulate antioxidant capacity to enhance graft self-repairing in DCD renal transplantation.Prolonged NHBT can delay the self-repairing and antioxidation of grafts.
基金Supported by the New Xiangya Talent Project of The Third Xiangya Hospital of Central South University,No.20170311
文摘AIM To investigate blood cultures of deceased donors and report the confirmed transmission of bacterial infection from donors to liver recipients.METHODS We retrospectively studied the results of blood cultures among our donation after cardiac death(DCD) donors and calculated the donor-derived bacterial infection rates among liver recipients. Study participants underwent liver transplantation between January 1, 2010 and February 1, 2017. The study involved a total of 67 recipients of liver grafts from 67 DCD donors. We extracted the data of donors' and patients' characteristics, culture results and clinical outcomes, especially the post-transplant complications in liver recipients, from electronic medical records. We analyzed the characteristics of the donors and the corresponding liver recipients with emphasis put on donor-derived infections.RESULTS Head trauma was the most common origin of death among our 67 DCD donors(46.3%). Blood taken prior to the procurement operation was cultured for 53 of the donors, with 17 episodes of bloodstream infections developing from 13 donors. The predominant organism isolated from the blood of donors was Gram-positive bacteria(70.6%). Only three(4.5%) of 67 liver recipients developed confirmed donor-derived bacterial infections,with two isolates of multidrug-resistant Klebsiella pneumoniae and one isolate of multidrug-resistant Enterobacter aerogenes. The liver recipients with donorderived infections showed relation to higher crude mortality and graft loss rates(33.3% each) within 3 mo post transplantation, as compared to those without donor-derived infections(9.4% and 4.7%, respectively). All three liver recipients received appropriate antimicrobial therapy.CONCLUSION Liver recipients have high occurrence of donor-derived infections. The liver recipients with donor-derived multidrug-resistant Enterobacteriaceae infections can have good outcome if appropriate antimicrobial therapy is given.
文摘There is continuing disparity between demand for and supply of kidneys for transplantation. This review describes the current state of kidney donation after cardiac death(DCD) and provides recommendations for a way forward. The conversion rate for potential DCD donors varies from 40%-80%. Compared to controlled DCD, uncontrolled DCD is more labour intensive, has a lower conversion rate and a higher discard rate. The super-rapid laparotomy technique involving direct aortic cannulation is preferred over in situ perfusion in controlled DCD donation and is associated with lower kidney discard rates, shorter warm ischaemia times and higher graft survival rates. DCD kidneys showed a 5.73-fold increase in the incidence of delayed graft function(DGF) and a higher primary non function rate compared to donation after brain death kidneys, but the long term graft function is equivalent between the two. The cold ischaemia time is a controllable factor that significantly influences the outcome of allografts, for example, limiting it to < 12 h markedly reduces DGF. DCD kidneys from donors < 50 function like standard criteria kidneys and should be viewed as such. As the majority of DCD kidneys are from controlled donation, incorporation of uncontrolled donation will expand the donor pool. Efforts to maximise the supply of kidneys from DCD include: implementing organ recovery from emergency department setting; improving familyconsent rate; utilising technological developments to optimise organs either prior to recovery from donors or during storage; improving organ allocation to ensure best utility; and improving viability testing to reduce primary non function.
文摘The scarcity of donor livers has increased the interest in donation after cardiac death(DCD) as an additional pool to expand the availability of organs. However, the initial results of liver transplantation with DCD grafts have been suboptimal due to an increased rate of complications, as well as decreased graft survival. These challenges have led to many developments in DCD donation outcome, as well as basic and translational research. In this article we review the unique characteristics of DCD donors, nuances of DCD organ procurement, the effect of prolonged warm and cold ischemia times, and discuss major studies that compared DCD to donation after brain death liver transplantation, in terms of outcomes and complications. We also review the different methods of donor treatment that has been applied to ameliorate DCD organ outcome, and we discuss the role of machine perfusion techniques in organ reconditioning. We discuss the two major perfusionmodels, namely, hypothermic machine perfusion and normothermic machine perfusion; we compare both methods, and delineate their major differences.
文摘The standard approach to organ preservation in liver transplantation is by static cold storage and the time between the cross-clamping of a graft in a donor and its reperfusion in the recipient is defined as cold ischemia time(CIT).This simple definition reveals a multifactorial time frame that depends on donor hepatectomy time,transit time,and recipient surgery time,and is one of the most important donor-related risk factors which may influence the graft and recipient’s survival.Recently,the growing demand for the use of marginal liver grafts has prompted scientific exploration to analyze ischemia time factors and develop different organ preservation strategies.This review details the CIT definition and analyzes its different factors.It also explores the most recent strategies developed to implement each timestamp of CIT and to protect the graft from ischemic injury.
文摘The procurement process for organ donation begins with the identification of potential organ donors in emergency or critical care units(CCU),followed by their clinical evaluation,diagnostic procedures,and therapeutic interventions,mostly conducted in CCUs.It concludes with the request for organ donation and,if accepted,the retrieval of organs.Despite most interventions occurring in detection units,there has been a neglect of the strategic role played by critical care specialists(CCS)in managing and caring for brain-dead or near-brain-death patients.Questions arise:Are they willing to undertake this responsibility?Do they fully comprehend the nature of organ procurement?Are they aware of the specific interventions required to maintain possible organ donors in optimal physiological condition?Our objective is to examine the role of CCS in organ procurement and propose ways to enhance it,ultimately aiming to increase and enhance organ donation rates.
文摘Introduction: Worldwide, End Stage Renal Disease (ESRD) is one of the leading disease with prolong morbidity. Kidney transplantation offers the best solution for the problem. The shortage of donor kidney is even bigger problem due to transplantation being one of the routine procedures. The use of deceased donor definitely increases the pool of donor with excellent immediate and long-term follow-up proven results. Aim: The aim is to analyze and summarize the outcome of Kidney transplantation. Methods & Materials: A total of 78 cases of Kidney Transplantation were selected for the study and categorized as: Group I—41 (living Donor), Group II—23 (DCD) & Group III—15 (DBD). Perspective study was done with clean data recorded & maintained pre-operatively, post-operatively and follow-up from Jan 2011 to Dec 2015 in our hospital. Post-operative graft status, complications and at least 1-year follow-up were area of main focus. Results: All patients underwent successful kidney transplantation. In Group I, the number of living donor kidney transplantation is 41 whereas in Group II (DCD) & III (DBD), the number of deceased donor transplantation is 23 and 15 respectively. The Normal functioning of graft (NGF) was 38 (87.8%), 16 (69.6%) & 11 (73.3%) in Group I, II & III respectively along with Poor Graft function (PGF) in Group I—4 (9.7%), II—5 (21.7%) & III—2 (13.3%) managed by continuing dialysis. Delayed graft function (DGF) was noted I-1 (2.4%), II-2 (8.6%) & III-1 (6.6%) in respective group, which returned to normal function post intervention. Therefore, 1<sup>st</sup> year graft survival was >93% [(Group I (97.6%), Group II (95.6%) & Group III (93.3%) respectively]. Manageable surgical complication were found in Group I—8 (19.5%), Group II—5 (21.7%) & Group III—2 (13.3%) like hematoma, hydronephrosis, leakage except one emboli related nephrectomy of transplanted kidney & one pneumonia led death in Group II. The overall survival was greater than 90% [(Group I (97.6%), Group II (91.3%) & Group III (93.3%) respectively] in all three groups after at least 1-year follow-up study, which was an excellent prognosis. Conclusion: Kidney Transplantation is safe, effective and the best method of treatment for ESRD. Significant improvement in quality of life is the hallmark merit over dialysis. Paired donation program should be encouraged in order to overcome shortage of kidney, which increases living donor pool. Outcome in living donor Kidney transplantation is always better than deceased donor transplantation. The prognosis of deceased donor transplantation (1 year Graft survival > 93% & 1 year patient survival > 90%) is also satisfactory with promising results. Therefore all the results were under acceptable standard limit. Thus, kidney transplantation (live or deceased donor) should be encouraged as primary modalities in the treatment of End Stage Renal Disease (ESRD).
文摘目的:比较亲属活体供肾与心脏死亡器官捐献(donation after cardiac death,DCD)供肾肾移植的临床效果。方法:回顾性分析2011-04~2018-01兰州大学第二医院肾移植科同期完成的45例亲属活体供肾(亲属活体供肾组)和21例DCD供肾肾移植受者(DCD供肾组)的临床资料,比较两组患者移植肾一般情况、肾功能、人肾累积存活率及并发症情况。结果:两组患者性别、BMI、手术时间、住院时长比较,差异无统计学意义(P>0.05),供、受者年龄和透析时间比较,差异有显著统计学意义(P<0.01)。亲属活体供肾组和DCD供肾组受者急性排斥反应分别发生2例(4.4%)和6例(28.6%),两组间差异有统计学意义(P<0.05);移植肾功能延迟恢复分别发生1例(2.2%)和2例(9.5%),两组间差异无统计学意义(P>0.05)。术后1周两组患者血肌酐比较,差异均有统计学意义,且术后患者血肌酐恢复至正常的时间比较,差异有统计学意义(P<0.05或P<0.01);术后2周、1个月、2个月两组患者血肌酐差异均无统计学意义。两组整个随访期的人、肾累积存活率比较,差异无统计学意义。结论:亲属活体供肾与DCD供肾肾移植早期效果类似,活体肾移植在移植肾术后急性排斥反应及肾功能短期恢复方面具有一定优势,但随访期间的人、肾累积存活率相同。