Application of extracorporeal cardiopulmonary resuscitation in adult patients with refractory cardiac arrest

BackgroundThe aim of this study was to summarize the clinical experience of extracorporeal cardiopulmonary resuscitation (ECPR) in the treatment of adult patients with refractory cardiac arrest.MethodsThe clinical data of 12 cases of adult patients with cardiac arrest hospitalized between June 2015 and September 2019 who were unable to achieve return of spontaneous circulation effectively with conventional cardiopulmonary resuscitation (CCPR) and were treated with ECPR technology were retrospectively analyzed. The group included six males and six females aged between 18 and 69 years. All the patients underwent veno-arterial extracorporeal membrane oxygenation (V-A ECMO) support with the adoption of femoral artery and vein catheterization.ResultsThe duration of cardiopulmonary resuscitation (CPR) for the 12 patients was 32–125 min, and the ECMO duration was 2–190 h. Four patients were successfully weaned from ECMO and survived until hospital discharge. The other eight patients died in hospital; hemodynamic collapse (four patients) in the early stage of ECMO and severe neurological complications (three patients) were the main causes of death.ConclusionsSingle-center data showed that ECPR provided a new rescue alternative for some patients with reversible refractory cardiac arrest. We have demonstrated that the success rate of treatment could be improved by selecting suitable patients and reducing the CPR duration as much as possible.     

体外循环膜氧合支持下全肺灌洗治疗肺泡蛋白沉积症一例并文献复习

目的提高对肺泡蛋白沉积症(PAP)患者肺灌洗治疗过程中低氧血症危险性的认识。方法介绍1例经病理证实的PAP患者体外循环膜氧合下的全肺灌洗治疗过程，并复习相关文献。结果57岁男性患者，因咳嗽和进行性呼吸困难12个月入院，动脉血氧分压(PaO2)为46mmHg(1mmHg=0．133kPa)，脉搏容积血氧饱和度(SpO2)85％～88％。胸部CT、经纤维支气管镜支气管肺泡灌洗和肺活检病理检查符合PAP。在手术室常规静脉全麻后，经口腔插入双腔管，分隔为通气肺和灌洗肺。两肺机械通气SpO2为80％～90％；当右侧单侧肺机械通气SpO2为68％～80％。于右股动脉和右股静脉插管，建立体外循环通道，开始静脉-动脉体外循环膜氧合(ECMO)支持，右侧单侧肺机械通气SpO2为89％～97％。左侧肺用总计20800ml生理盐水灌洗，灌洗期间SpO2为80％～94％；灌洗后，患者无呼吸困难。28d后未用ECMO完成右肺灌洗。1个月后复查CT示双肺浸润影基本消失。结论当PAP患者全肺灌洗操作前出现顽固的低氧血症，应考虑使用ECMO支持，以避免患者在全肺灌洗治疗中的危险低氧血症。     

Extracorporeal membrane oxygenation, an anesthesiologist's perspective: physiology and principles. Part 1

Extracorporeal membrane oxygenation (ECMO) is an adaptation of conventional cardiopulmonary bypass techniques to provide cardiopulmonary support. ECMO provides physiologic cardiopulmonary support to aid reversible aspects of the disease process and to allow recovery. ECMO does not provide treatment of the underlying disease. The indications for ECMO support have expanded from acute respiratory failure to acute cardiac failure refractory to conventional treatments from wide patient subsets involving neonates to adults. Vascular access for ECMO support is either percutaneous through a single-site, dual-lumen bicaval cannula or transthoracic via separate cannulas. The modes of support are either veno-venous or veno-arterial ECMO. In this article, the physiologic aspects of ECMO support are outlined.     

Review of ECMO (extra corporeal membrane oxygenation) support in critically ill adult patients

Mechanical circulatory support has evolved markedly over recent years. ECMO (extra corporeal membrane oxygenation) is instituted for the management of life threatening pulmonary or cardiac failure (or both), when no other form of treatment has been or is likely to be successful. Most commonly, it is instituted in an emergency or urgent situation after failure of other treatment modalities. It is used as temporary support, usually awaiting recovery of organs, or can be used as a bridge to a more permanent device or cardiac transplantation. ECMO can be deployed in a veno-arterial configuration (either peripheral or central cannulation) for the treatment of cardiogenic shock. This is usually seen post-cardiotomy, post-heart transplant and in severe cardiac failure due to almost any other cause (e.g. cardiomyopathy, myocarditis, acute coronary syndrome with cardiogenic shock). Veno-venous ECMO is used for respiratory failure and usually involves peripheral cannulation using the femoral veins+/-internal jugular vein if required. The indications for veno-venous ECMO are respiratory failure, most commonly due to adult respiratory distress syndrome (ARDS), pneumonia, trauma or primary graft failure following lung transplantation. ECMO is also used for neonatal and paediatric respiratory support. Its use in premature neonates is the mainstay of treatment for immature lungs and insufficient surfactant. In this review, the technical aspects of ECMO cannulation, maintenance and weaning are outlined. Complication rates and outcomes are reviewed and our experience at The Epworth Hospital is summarized.     

犬ECMO期间动静脉二氧化碳分压差与心输出量的关系

目的 研究犬在体外膜肺氧合（ECMO）辅助期间动静脉二氧化碳分压差（Pcv-aCO2）与心输出量（CO）的关系.方法 5只犬经股静脉放置中心静脉管,股动脉放置动脉测压管连接有创心输出量监测仪及心电监护仪,采用股静脉·颈静脉ECMO模式进行辅助,于ECMO建立前（T0）、转机后即可（T1）、辅助1 h（T2）和辅助2 h（T3）四个时点监测CO,并同时采集动静脉血进行血气分析计算Pcv-aCO2值,分析Pcv-aCO2、中心静脉血氧饱和度（ScvO2）、乳酸（Lac）与CO相关性.结果 Pcv-aCO2与CO呈负相关（r=-0.457,P＜0.05）;ScvO2、Lac与CO之间无明显相关.结论 犬ECMO辅助期间Pcv-aCO2与CO具有相关性,Pcv-aCO2可间接反映CO的变化趋势.     

一种穿刺置管新方法在ECMO联合IABP介入治疗复杂高危冠心病中的应用

目的 评估应用同侧股动脉置入主动脉内球囊反搏（IABP）和大直径经皮冠状动脉介入（PCI）治疗指引导管,联合对侧股动脉与股静脉用于置入体外膜肺氧合（ECMO）的穿刺策略,观察该置管方式对于复杂高危冠心病患者（CHIP）完成PCI手术的安全性和可行性。 方法 共纳入7例患者,左侧股动脉与股静脉置入ECMO鞘管（动脉置管直径15F,静脉置管直径17F）,右侧股浅动脉置入IABP（均为7F动脉鞘管）,右侧股总动脉置入PCI股动脉鞘管（均为7F动脉鞘管）,ECMO动脉及静脉穿刺处采用预置ProGlide血管缝合器止血,PCI和IABP股动脉穿刺处应用Angioseal血管封堵器止血。术后针对股动脉、股静脉穿刺部位进行临床症状与体征评估,并全部进行血管超声检查,观察该穿刺置管的成功率以及完成PCI手术的可行性,观察住院期间穿刺部位相关的并发症发生率。 结果 7例患者中,男性6例,女性1例,年龄（57±12）岁,合并高血压5例（71%）、糖尿病3例（43%）、慢性肾病1例（14%）、高脂血症4例（57%）、卒中1例（14%）、外周血管疾病4例（57%）。双侧股动脉,左侧股静脉穿刺成功率100%,PCI手术完成率100%。仅一例患者术后超声检查发现股浅动脉穿刺部位发生皮下小血肿,所有患者住院期间均未观察到严重血管并发症。 结论 在CHIP患者中,当需要ECMO联合IABP维持血流动力学稳定,并需要穿刺股动脉置入大直径指引导管完成复杂PCI手术的情况下,可采用同侧股浅动脉置入IABP,股总动脉置入大直径（7F）PCI动脉鞘管,对侧股动脉、股静脉置入ECMO的手术穿刺策略,该方法安全可行。     

Severe intoxication with cardiotoxic drugs: value of emergency percutaneous cardiocirculatory assistance

Acute severe self-administration of an overdose of betablockers, calcium antagonists or antiarrhythmic drugs is rare but carries a mortality of 10-15%. Between May 1997 and March 2000, 6 patients with an average age of 34 years (range 17-55 years) had a cardiac arrest on admission requiring emergency cardiac massage and emergency intubation with ventilatory assistance following massive ingestion of cardiotoxic drugs. Echocardiography confirmed complete biventricular akinesia. The surgical team implanted a cardiovascular assist device (ECMO: Extra Corporeal Membrane Oxygenation) by the femoral approach with pre-heparinated percutaneous cannula. The first two patients died of multi-organ failure due to a delay in the installation of the assistance. The 4 other patients survived without sequellae or recurrences. The average time on ECMO was 59.25 +/- 2 hours (range 48-71 hours). The early recognition of the indication for ECMO was one of the most important predictive factors for morbidity and mortality. The strategy of patient management should be determined in the emergency room: in cases of cardiocirculatory arrest resistant to symptomatic treatment (stomach washout, intravenous fluids, isoprenaline, inotropic agents) an echocardiogram should be obtained and the cardiac surgical team alerted to the problem. The introduction of pre-heparinated circuits, percutaneous cannula and peripheral shunts has widened the indications, efficacy (detoxification, restoration of peripheral tissue perfusion) and accessibility to this material, while limiting its duration. The collaboration of experienced multidisciplinary teams (emergency room staff, cardiologists, anaesthetists and surgeons) should optimise the timing of implantation and the monitoring of these systems and improve the results of resuscitation of these patients.     

Femoral venoarterial extracorporeal membrane oxygenation for severe reimplantation response after lung transplantation

Severe pulmonary reimplantation response after lung transplantation is not very common, although the mortality can be high. We present a patient who developed an extremely severe reperfusion injury after bilateral lung transplantation. Because of severe hypoxia and hemodynamic instability, despite aggressive ventilator settings, venoarterial extracorporeal membrane oxygenation (ECMO) was instituted using the femoral approach at the bedside. During ECMO, the patient developed a thoracic wall hematoma that was treated with transfusion alone. After 50 h of ECMO, his chest radiograph had dramatically improved, his oxygen need had been reduced to 50%, and he was successfully weaned from ECMO. Two years later, he is doing extremely well. Therefore, institution of ECMO using the femoral approach can be performed safely at the bedside in the ICU, and can be lifesaving in the context of a very severe reimplantation response after lung transplantation.     

体外膜肺氧合中犬肿瘤坏死因子、白介素8及白介素10的变化

目的:探讨细胞因子肿瘤坏死因子α(TNF-α)、白介素8(IL-8)及白介素10(IL-10)在体外膜肺氧合(ECMO)过程中的变化特点及变化规律。方法:选择健康杂种犬6只,均为雄性,体质量(23±2)kg,采用Medtronic 550型离心泵;ECMO儿童套包:Medtronic Silicone。沿腹股沟方向切开皮肤并解剖出股静脉,分别插入12Fr动脉插管及14Fr静脉插管并结扎固定动静脉插管与ECMO循环管道连接。ECMO转流前5min静脉注射肝素1mg/kg,检测ACT,维持在180～220s。分别在ECMO治疗开始前30min,开始后6h、12h、24h、36h及48h抽取犬外周静脉血,分离出血清,采用酶联免疫吸附法(ELISA)检测血清炎性细胞因子TNF-α、IL-8及IL-10,观察TNF-α、IL-8及IL-10在ECMO过程中不同时间点的变化特点和变化规律。结果:在ECMO过程中随着辅助时间的延长外周血TNF-α浓度和IL-8浓度有升高的趋势,但在实验开始36h外周血中TNF-α、IL-8浓度差异均无统计学意义(P0.05),在辅助48h时与辅助前差异有统计学意义(P0.05)。IL-10浓度在ECMO辅助过程中无明显的变化,ECMO辅助前和辅助过程中的各时间点比较IL-10浓度差异均无统计学意义(P0.05)。结论:体外膜肺氧合治疗36h不会引起血清炎症及抗炎因子显著升高,48h开始血清炎症因子浓度开始升高,抗炎因子浓度仍无明显变化。     

Effect of acute hypoxia on airway and vascular exchangeable lung water spaces in dogs

To determine if alveolar hypoxia causes subclinical noncardiogenic pulmonary edema, we measured in 8 dogs the rebreathing pulmonary tissue volume (Vt) and the pulmonary extravascular water volume using the single-pass double-indicator dilution method. After baseline measurements, the dogs were ventilated with the lowest concentration of oxygen that would not cause left ventricular failure (9 to 13% O2). One to 6 h of hypoxia had no effect on Vt, but caused a reversible 38% fall in pulmonary extravascular lung water volume by the indicator method (p less than 0.01). The ratio of the extravascular to vascular volumes estimated from the relative peak heights of the 2 indicator dilution curves did not change with hypoxia, which implies that hypoxia caused a derecruitment of pulmonary blood vessels rather than a real decrease in extra-vascular lung water volume. This conclusion is supported by our rebreathing measurement of the airway exchangeable tissue volume, which is virtually independent of tissue perfusion, and which did not fall during hypoxia. To determine if this alteration in the pulmonary circulation can cause pulmonary edema when the cardiac output is increased, we opened a femoral artery to femoral vein shunt in 9 additional dogs during ventilation with 9 to 13% oxygen. Cardiac output increased over 50% but pulmonary edema developed in only 1 dog, the dog that also had the highest mean pulmonary artery pressure of the group (35 mmHg versus group mean of 26 mmHg during hypoxia). We conclude that 1 to 6 h of alveolar hypoxia in dogs consistently decreases the volume of perfused lung tissue.(ABSTRACT TRUNCATED AT 250 WORDS)     

体外膜肺氧合对心脏术后心肺复苏患者的应用

目的:探讨体外膜肺氧合技术(ECMO)在成年心脏手术后心肺复苏(CPR)困难患者的应用经验。方法:回顾分析2010年1月至2012年9月期间,7例心脏手术后因CPR困难应用ECMO救治的成年患者的临床资料,男性4例,女性3例,年龄42～65岁,平均(54±7)岁,其中冠状动脉旁路移植术(CABG)6例,主动脉瓣置换术1例。全部患者均经股动静脉插管建立ECMO辅助。结果:7例患者CPR时间40～65 min,平均(53±7)min,建立ECMO辅助后全部患者均恢复自主心律,ECMO辅助时间36～128 h,平均(85±26)h,监护室停留时间2～8d,平均(5±1)d。辅助24h后患者平均动脉压(MBP)、血乳酸(Lac)及正性肌力药物评分(IS)均明显改善。6例(85.7%)患者成功撤离ECMO辅助,其中3例(42.9%)存活出院,1例患者因无法脱机而死亡,3例成功脱机后因感染及中枢神经系统并发症死亡;4例患者同时应用主动脉内球囊反搏(IABP),3例进行肾替代治疗(CRRT)。结论:体外膜肺心肺复苏(ECPR)可以提供紧急生命支持,挽救部分常规方法复苏困难的心脏术后心脏骤停患者的生命。     

重症急性呼吸窘迫综合征体外膜肺治疗的探讨

目的 回顾性分析体外膜氧合(ECMO)在重症急性呼吸窘迫综合征(ARDS)治疗中的作用.方法 应用股静脉-股动脉途径的ECMO支持对1例吸入烟雾弹致严重ARDS患者治疗41 d.连续观察患者血液动力学、肺影像学、呼吸机参数、经皮脉氧氧饱和度、酸碱平衡、血乳酸含量以及心、肝、肾、脑功能的变化.结果 ECMO支持技术可使重症ARDS患者较长时间维持生理水平的动脉血气、组织氧供及酸碱平衡,保持良好的心、肺、肾、脑功能,但患者在行ECMO支持治疗的第41天因严重的肺部感染并可能的脑出血失去继续治疗的价值而终止治疗.结论 ECMO可提供有效的肺功能支持,可为ARDS患者肺的恢复和临床进一步处理创造了机会.出血与栓塞是维持ECMO顺利运行的关键问题.     

Analysis and results of prolonged resuscitation in cardiac arrest patients rescued by extracorporeal membrane oxygenation

OBJECTIVES: We conducted this study to determine the result of prolonged cardiopulmonary resuscitation (CPR) with extracorporeal membrane oxygenation (ECMO) and the predictive factors for hospital discharge and ECMO weaning. BACKGROUND: Prolonged CPR carries considerable associated mortality and morbidity. As yet, ECMO for prolonged CPR has no definite results. Only small groups of patients and no detailed analysis have been reported. METHODS: Candidates for ECMO resuscitation were patients in cardiac arrest receiving CPR >10 min without return of spontaneous circulation and no absolute contraindication. Venoarterial ECMO was set up during CPR. We reviewed the data of 57 prolonged CPR patients who received ECMO during CPR over a six-year period. RESULTS: The mean duration of CPR was 47.6 +/- 13.4 min and that of ECMO was 96.1 +/- 87.9 h. The rate of weaning was 66.7%, and the survival rate was 31.6%. Multiple-organ failure was the major reason for mortality, despite successful weaning. Among survivors, long-term follow-up revealed 88.9% survival, and only 5.6% had a severe neurologic deficit. The results indicate that a shorter CPR duration, postcardiotomy arrest, myocardial indicators, a hepatic indicator, and lactic acid are significantly correlated with both weaning and survival, whereas late damage (level on the third or seventh day of reperfusion) rather than initial damage (level on the first day) was more predictive of the results. CONCLUSIONS: Prolonged CPR rescue by ECMO provides an acceptable survival rate and outcome in survivors. Our results of the selected cases encourage further investigations of the wider application of ECMO in CPR.     

胸腔镜下心脏外科手术并发症的分析及预防

目的 分析胸腔镜心脏手术围手术期的并发症及意外情况.方法 采用经股动、静脉插管,体外循环下全电视胸腔镜心脏手术对心脏病患者进行治疗,对治疗过程中出现的意外情况及并发症进行详细记录、观察、分析,并讨论相应预防及处理措施.结果 105例患者中出现了以下并发症：低氧高碳酸血症2例,周围体外循环泵压高、灌注流量不足2例,升主动脉夹层1例,主动脉出血1例,乳内动静脉损伤1例,血气胸2例,股动脉狭窄2例,股神经卡压、损伤1例.经术中相应补救措施、术后妥善治疗后并发症得以缓解或痊愈,均得到了有效控制.结论 经股动、静脉插管,体外循环下全电视胸腔镜心脏手术是安全有效的,其术中、术后可能出现的并发症及意外情况是完全可防可治的.     

Welche Bedeutung haben mechanische Assist-Systeme beim Herz-Kreislauf-Stillstand?

Mechanical assist devices are indicated for hemodynamic stabilization in acute circulatory arrest if conventional means of cardiopulmonary resuscitation are unable to re-establish adequate organ perfusion. Their temporary use facilitates further diagnostic and therapeutic options in selected patients, e.g. coronary angiography followed by revascularization.External thorax compression devices allow sufficient cardiac massage in case of preclinical or in-hospital circulatory arrest, especially under complex transfer conditions. These devices perform standardized thorax compressions at a rate of 80–100 per minute. Invasive mechanical support devices are used in the catheter laboratory or in the intensive care unit. Axial turbine pumps, e.g. the Impella, continuously pump blood from the left ventricle into the aortic root. The Impella can also provide right ventricle support by pumping blood from the vena cava into the pulmonary artery. So-called emergency systems or ECMO devices consist of a centrifugal pump and a membrane oxygenator allowing complete takeover of cardiac and pulmonary functions. Withdrawing blood from the right atrium and vena cava, oxygenated blood is returned to the abdominal aorta. Isolated centrifugal pumps provide left heart support without an oxygenator after transseptal insertion of a venous cannula into the left atrium.Mechanical assist devices are indicated for acute organ protection and hemodynamic stabilization for diagnostic and therapeutic measures as well as bridge to myocardial recovery. Future technical developments and better insights into the pathophysiology of mechanical circulatory support will broaden the spectrum of indications of such devices in acute circulatory arrest.     

Long-term health-related quality of life of adult patients treated with extracorporeal membrane oxygenation (ECMO): An integrative review

Background: Extracorporeal membrane oxygenation (ECMO), a rescue treatment for patients with severe pulmonary and/or cardiac dysfunction, is increasingly being used worldwide. A better understanding of long-term health-related quality of life (HRQOL) is needed. Objective: To synthesize research on long-term (at least 6 months post-ECMO) HRQOL of adults treated with ECMO. Methods: In this integrative review, we searched 3 electronic databases and did a hand search of relevant journals for articles published 2000–2019, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Results: Thirty-one studies, representing 913 patients treated with ECMO, were included. Long-term HRQOL was slightly better for patients treated with veno-venous ECMO than veno-arterial ECMO, and mental health outcomes tended to be better than physical ones. Survivors frequently experienced physical complications, functional limitations, anxiety, depression, and post-traumatic stress symptoms, although improvements were observed over time. Conclusions: Early identification and management of physical and mental health problems may improve HRQOL outcomes.     

Extracorporeal membrane oxygenation as a rescue of intractable ventricular fibrillation and bridge to heart transplantation

Extracorporeal membrane oxygenation (ECMO) systems have undergone rapid technological improvements and are now feasible options for medium‐term support of severe cardiac or pulmonary failure. Intractable ventricular arrhythmia is a rare but well‐established indication for heart transplantation. We report a case of persistent ventricular fibrillation (VF) that was rescued by insertion of peripheral veno‐arterial ECMO during cardiopulmonary resuscitation, which provided support for 30 h of continuous VF and subsequently permitted urgent heart transplantation.     

Pheochromocytoma Crisis With Severe Cyclic Blood Pressure Fluctuations in a Cardiac Pheochromocytoma Patient Successfully Resuscitated by Extracorporeal Membrane Oxygenation: A Case Report

Cardiac pheochromocytoma is relatively rare. Few reports describe the intraoperative and postoperative progression of patients experiencing a life-threatening pheochromocytoma crisis treated with extracorporeal membrane oxygenation (ECMO).A 35-year-old man was referred to our facility for paroxysmal hypertension with a 10-year history of sweating, headaches, cardiac palpitations, and postexercise dyspnea. The patient initially underwent urine catecholamine measurement and an isotope scan, somatostatin receptor scintigraphy, and 18F-fluorodeoxyglucose positron emission tomography/computer tomography (CT), which indicated a multiple, cardiac pheochromocytoma. Echocardiography, cardiac magnetic resonance imaging (MRI), CT reconstruction, and a coronary CT angiography revealed several lesions at the aortic root and along the cardiac vasculature.Multifocal cardiac pheochromocytoma was diagnosed and pheochromocytoma crisis with severe cyclic blood pressure fluctuation occurred during surgery.Surgical resection of multiple pheochromocytomas in the right medial carotid sheath, mediastinum between the main and pulmonary arteries, and between the abdominal aorta and inferior vena artery was performed. To ensure cardiac perfusion and avoid severe circulatory fluctuation, the cardiac paraganglioma resection was prioritized. After resecting the cardiac pheochromocytoma, a severe pheochromocytoma crisis with rapid cyclic blood pressure fluctuation developed. ECMO and intraaortic balloon pump (IABP) were initiated to stabilize circulation and perfusion. Phenoxybenzamine, norepinephrine, epinephrine, and fluid resuscitation were administered to support cardiovascular function.The magnitude of blood pressure fluctuation steadily decreased with treatment. IABP was discontinued after 3 days, and ECMO was discontinued after 16 days. The patient was discharged 3 months postoperatively.This case indicates that mechanical life support with ECMO is a valuable option for pheochromocytoma-induced cardiac shock and should be considered as an effective therapeutic choice in patients with highly unstable hemodynamic function.     

体外膜肺氧合在心脏危重症患者救治中的应用

目的:总结体外膜肺氧合(ECMO)辅助在心脏危重症患者中的临床救治经验与体会。方法:回顾性分析7例因药物治疗和/或主动脉内球囊反搏(IABP)无效而行ECMO辅助的心源性休克或血流动力学障碍患者的临床资料。ECMO辅助的主要原因:急性心肌梗死后心源性休克4例(57.1%),暴发性心肌炎1例(14.3%),心脏骤停2例(28.6%)。结果:7例患者ECMO平均辅助时间(4.7±3.2)d(范围:1~9 d),6例(85.7%)顺利撤除ECMO,3例行经皮冠状动脉介入治疗。主要并发症包括:出血2例(28.6%),肢体缺血1例(14.3%),急性肾衰竭1例(14.3%),多器官功能衰竭2例(28.6%)。1例在ECMO辅助情况下放弃治疗死亡,2例在成功撤除ECMO后死亡。其中,1例死于严重出血,2例死于多器官功能衰竭。其余4例(57.1%)好转存活出院。结论:ECMO能暂时性为心肺功能提供有效的支持,有利于稳定心脏危重患者的血流动力学,为心功能的恢复创造机会,减少ECMO相关并发症的发生可能会改善心脏危重患者预后。     

Paradoxical embolisation of a catheter fragment to a coronary artery in an infant with congenital heart disease.

Six weeks after cardiac catheterisation via the right femoral vein an infant underwent an anatomical correction for transposition of the great vessels and closure of a large ventricular septal defect. The patient died intraoperatively as a result of severe left ventricular dysfunction. Necropsy showed an old myocardial infarction associated with thrombosis of the circumflex coronary artery. Electron probe x ray analysis showed that foreign refractile material within the thrombus contained bismuth, an element used in the construction of some cardiac catheters. This is believed to be the first report of "paradoxical" coronary embolisation of catheter-derived material and highlights the usefulness of electron probe x ray analysis.