Graft ischemia

  • 文章类型: Case Reports
    背景:循环性死亡(DCD)后的肺捐赠已被证明是扩大捐赠池的有效策略,但仍被认为具有挑战性。我们报告了一例从扩展标准的不受控制的DCD中进行肺部采购的成功案例。
    方法:我们评估了来自没有体外膜氧合(ECMO)计划的医院的不受控制的DCD的肺部。捐赠者是一名20岁的非吸烟者,有心肌病史,心脏循环停止,和Lennox-Gastaut综合征.心脏骤停发生在游泳池,支气管镜检查显示有吸入迹象。我们采用了通常的常温原位开放通气肺方法。检索后,肺被储存在冰上,然后用离体肺灌注(EVLP)进行评估,并判断是否适合移植。接受者是一名26岁的女性,患有长期氧疗的囊性纤维化,由于她的拟人化特征,在等候名单上长达21个月。在双侧肺移植期间,她需要中央VA-ECMO支持。在最初的72小时内,原发性移植物功能障碍(PGD)达到3级;手术后两天停止了外周VV-ECMO支持。患者在手术后28天出院;她在移植后两年还活着,没有排斥反应或吻合并发症的迹象。
    结论:尽管受控DCD的肺部使用广泛,不受控制的DCD仍然存在困惑,即:重度PDG,术后死亡率,气道并发症。
    结论:我们的病例报告表明,尽管存在相对禁忌症,但不受控制的DCD可以取得良好的效果:吸入水,延长缺血时间和条件差的接受者。
    BACKGROUND: Lung donation after circulatory death (DCD) has proved to be an effective strategy for expanding the donor pool, but is still considered challenging. We report a successful case of lung procurement from an extended-criteria uncontrolled DCD.
    METHODS: We evaluated the lungs of an uncontrolled DCD from a hospital without extracorporeal membrane oxygenation (ECMO) program. The donor was a non-smoker 20-year old male with a history of cardiomyopathy, cardiocirculatory arrests, and Lennox-Gastaut syndrome. Cardiac arrest occurred in a swimming pool, and bronchoscopy showed signs of inhalation. We employed our usual normothermic in-situ open-ventilated lung approach. After retrieval, lungs were stored on ice, then evaluated with ex-vivo lung perfusion (EVLP) and judged suitable for transplantation. The recipient was a 26-year old female with cystic fibrosis on long-term oxygen therapy, on the waitlist for up to 21 months due to her anthropomorphic characteristics. She required central VA-ECMO support during bilateral lung transplantation. Primary graft dysfunction (PGD) within the first 72 h reached grade 3; post-operative peripheral VV-ECMO support was discontinued two days after surgery. The patient was discharged 28 days after surgery; she is alive two years after transplantation with no signs of rejection nor anastomotic complications.
    CONCLUSIONS: Despite the spreading use of lungs from controlled DCD, perplexities remain on uncontrolled DCD, namely: severe PDG, postoperative mortality, airway complications.
    CONCLUSIONS: Our case report suggests that good results can be achieved with uncontrolled DCD despite the presence of relative contraindications: inhalation of water, prolonged ischemic times and recipient in poor conditions.
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  • 文章类型: Journal Article
    In this study we aimed to assess the impact of agonal time and warm ischemic time on early survival in Category III donation-after-circulatory-death (DCD) donor lung transplants (LTxs) using data reported to the International Society for Heart and Lung Transplantation (ISHLT) DCD Lung Transplant Registry.
    In this retrospective study, data were analyzed for 507 DCD LTxs done between January 2005 and June 2015. DCD lung donor agonal time (defined as withdrawal of life support to cessation of cardiac output) and warm ischemic time (WIT; defined as donor systolic blood pressure <50 mm Hg to cold pulmonary artery flush) were divided into 3 clinical timing categories (<30 minutes, 30 to 60 minutes, >60 minutes) and 3 tertiles. Univariate analysis was undertaken for all categorizations, and Day 30/Day 365 Kaplan‒Meier survival rates were calculated and compared. Multivariable analysis included Cox proportional hazards regression models to estimate hazard of 365-day mortality.
    Four hundred sixty-five and 301 DCD LTxs had data to analyze in the agonal and warm ischemic time groups, respectively. Day 30 and Day 365 post-transplant survival overall were 96% and 90%, respectively, and not statistically different according to agonal or WIT category or tertile.
    Current experience with DCD Category III LTx does not show a relationship between the duration of donor agonal phase or warm ischemic time up to 60 minutes and early survival. These results suggest the true limits of clinical DCD allograft warm ischemic times may not yet be reached. Global variations in clinical DCD practice are apparent. Continued accurate recording and analyses of DCD processes is warranted.
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