Although the rate of lung transplantation (LTx), the last treatment option for end-stage lung disease, is increasing, some patients waiting for LTx need a bridging strategy for LTx due to the limited number of available donor lungs. For a long time, mechanical ventilation has been employed as a bridge to LTx because the outcome of using extracorporeal membrane oxygenation (ECMO) as a bridging strategy has been poor. However, the outcome after mechanical ventilation as a bridge to LTx was poor compared with that in patients without bridges. With advances in technology and the accumulation of experience, the outcome of ECMO as a bridge to LTx has improved, and the rate of ECMO use as a bridging strategy has increased over time. However, whether the use of ECMO as a bridge to LTx can achieve survival rates similar to those of non-bridged LTx patients remains controversial. In 2010, one center introduced awake ECMO strategy for LTx bridging, and its use as a bridge to LTx has been showing favorable outcomes to date. Awake ECMO has several advantages, such as maintenance of physical activity, spontaneous breathing, avoidance of endotracheal intubation, and reduced use of sedatives and analgesics, but it may cause serious problems. Nonetheless, several studies have shown that awake ECMO performed by a multidisciplinary team is safe. In cases where ECMO or mechanical ventilation is required due to unavoidable exacerbation in patients awaiting LTx, the application of awake ECMO performed by an appropriately trained ECMO multi-disciplinary team can be useful.
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Background Lung transplantation (LT) is an accepted therapeutic modality for end-stage lung disease patients. Intensive care unit (ICU) readmission is a risk factor for mortality after LT, for which consistent risk factors have not been elucidated. Thus, we investigated the risk factors for ICU readmission during index hospitalization after LT, particularly regarding the posttransplant condition of LT patients.
Methods In this retrospective study, we investigated all adult patients undergoing LT between October 2012 and August 2017 at our institution. We collected perioperative data from electronic medical records such as demographics, comorbidities, laboratory findings, ICU readmission, and in-hospital mortality.
Results We analyzed data for 130 patients. Thirty-two patients (24.6%) were readmitted to the ICU 47 times during index hospitalization. At the initial ICU discharge, the Sequential Organ Failure Assessment (SOFA) score (odds ratio [OR], 1.464; 95% confidence interval [CI], 1.083−1.978; P=0.013) and pH (OR, 0.884; 95% CI, 0.813−0.962; P=0.004; when the pH value increases by 0.01) were related to ICU readmission using multivariable regression analysis and were still significant after adjusting for confounding factors. Thirteen patients (10%) died during the hospitalization period, and the number of ICU readmissions was a significant risk factor for in-hospital mortality. The most common causes of ICU readmission and in-hospital mortality were infection-related.
Conclusions The SOFA score and pH were associated with increased risk of ICU readmission. Early postoperative management of these factors and thorough posttransplantation infection control can reduce ICU readmission and improve the prognosis of LT patients.
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Lung transplantation is widely accepted as the only viable treatment option for patients with end-stage lung disease. However, the imbalance between the number of suitable donor lungs available and the number of possible candidates often results in intensive care unit (ICU) admission for the latter. In the ICU setting, critical care is essential to keep these patients alive and to successfully bridge to lung transplantation. Proper management in the ICU is also one of the key factors supporting long-term success following transplantation. Critical care includes the provision of respiratory support such as mechanical ventilation (MV) and extracorporeal life support (ECLS). Accordingly, a working knowledge of the common critical care issues related to these unique patients and the early recognition and management of problems that arise before and after transplantation in the ICU setting are crucial for long-term success. In this review, we discuss the management and selection of candidates for lung transplantation as well as existing respiratory support strategies that involve MV and ECLS in the ICU setting.
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Joo Han Song, Ji-Eun Park, Sang Chul Lee, Sarang Kim, Dong Hyung Lee, Eun Kyoung Kim, Song Yee Kim, Ji Cheol Shin, Jin Gu Lee, Hyo Chae Paik, Moo Suk Park
Acute Crit Care. 2018;33(3):146-153. Published online August 31, 2018
Background Physical function may influence perioperative outcomes of lung transplantation. We investigated the feasibility of a pulmonary rehabilitation program initiated in the immediate postoperative period at an intensive care unit (ICU) for patients who underwent lung transplantation.
Methods We retrospectively evaluated 22 patients who received pulmonary rehabilitation initiated in the ICU within 2 weeks after lung transplantation at our institution from March 2015 to February 2016. Levels of physical function were graded at the start of pulmonary rehabilitation and then weekly throughout rehabilitation according to criteria from our institutional pulmonary rehabilitation program: grade 1, bedside (G1); grade 2, dangling (G2); grade 3, standing (G3); and grade IV, gait (G4).
Results The median age of patients was 53 years (range, 25 to 73 years). Fourteen patients (64%) were males. The initial level of physical function was G1 in nine patients, G2 in seven patients, G3 in four patients, and G4 in two patients. Patients started pulmonary rehabilitation at a median of 7.5 days (range, 1 to 29 days) after lung transplantation. We did not observe any rehabilitation-related complications during follow-up. The final level of physical function was G1 in six patients, G3 in two patients, and G4 in 14 patients. Fourteen of the 22 patients were able to walk with or without assistance, and 13 of them maintained G4 until discharge; the eight remaining patients never achieved G4.
Conclusions Our results suggest the feasibility of early pulmonary rehabilitation initiated in the ICU within a few days after lung transplantation.
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In the spring of 2011, a cluster of lung injuries caused by humidifier disinfectant (HD) usage were reported in Korea. Many patients required mechanical ventilation, extracorporeal membrane oxygenation, and even lung transplantation (LTPL). However, the long-term course of HD-associated lung injury remains unclear because the majority of survivors recovered normal lung function. Here we report a 33-year-old woman who underwent LTPL approximately four years after severe HD-associated lung injury. The patient was initially admitted to the intensive care unit and was supported by a high-flow nasal cannula. Although she had been discharged, she was recurrently admitted to our hospital due to progressive lung fibrosis and a persistent decline in lung function. Finally, sequential double LTPL was successfully performed, and the patient’s clinical and radiological findings showed significant improvement. Therefore, we conclude that LTPL can be a therapeutic option for patients with chronic inhalation injury.
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Background Extracorporeal membrane oxygenation (ECMO) is administered for a few days after lung transplantation (LTx) in recipients who are expected to have early graft dysfunction. Despite its life-saving potential, immediate postoperative ECMO has life-threatening complications such as postoperative bleeding. We investigated the risk factors related to the use of immediate postoperative ECMO.
Methods We retrospectively reviewed the records of 60 LTx patients who were at our institution from October 2012 to May 2015. Perioperative variables associated with postoperative ECMO were compared between the two groups.
Results There were 26 patients who received postoperative ECMO (ECMO group) and 34 patients who did not (control group). Multivariate regression analysis revealed preoperative ECMO (odds ratio [OR] 12.55, 95% confidence intervals [CI] 1.34 – 117.24, p = 0.027) and lower peripheral pulse oxymetry saturation (SpO2) at the end of surgery (OR 0.71, 95% CI 0.54 – 0.95, p = 0.019) were independent risk factors for postoperative ECMO in LTx patients. The incidences of complications, such as re-operation, tracheostomy, renal failure and postoperative atrial fibrillation, were higher in the ECMO group. There was no difference in the duration of postoperative intensive care unit stay or postoperative 30-day mortality between the two groups.
Conclusions The preoperative ECMO and lower SpO2 at the end of surgery were associated with postoperative ECMO. Further, postoperative adverse events were higher in the ECMO group compared with the control group. This study suggests that determination of postoperative ECMO requires careful consideration because of the risks of postoperative ECMO in LTx patients.
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The Future of Research on Extracorporeal Membrane Oxygenation (ECMO) Ji Young Lee Korean Journal of Critical Care Medicine.2016; 31(2): 73. CrossRef
Severe acute respiratory distress syndrome (ARDS) is a life-threatening disease with a high mortality rate. Although many therapeutic trials have been performed for improving the mortality of severe ARDS, limited strategies have demonstrated better outcomes. Recently, advanced rescue therapies such as extracorporeal membrane oxygenation (ECMO) made it possible to consider lung transplantation (LTPL) in patients with ARDS, but data is insufficient. We report a 62-year-old man who underwent LTPL due to ARDS with no underlying lung disease. He was admitted to the hospital due to influenza A pneumonia-induced ARDS. Although he was supported by ECMO, he progressively deteriorated. We judged that his lungs were irreversibly damaged and decided he needed to undergo LTPL. Finally, bilateral sequential double-lung transplantation was successfully performed. He has since been alive for three years. Conclusively, we demonstrate that LTPL can be a therapeutic option in patients with severe ARDS refractory to conventional therapies.
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Lung transplantation for acute respiratory distress syndrome: a retrospective European cohort study Jens Gottlieb, Philipp M. Lepper, Cristina Berastegui, Beatriz Montull, Alexandra Wald, Jasvir Parmar, Jesper M. Magnusson, Felix Schönrath, Tanel Laisaar, Sebastian Michel, Hillevi Larsson, Robin Vos, Assad Haneya, Tim Sandhaus, Erik Verschuuren, Jérôme European Respiratory Journal.2022; 59(6): 2102078. CrossRef
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Colonization of the pre-transplant lung by multidrug-resistant bacteria affects short- and long-term outcomes of lung transplantation. However, there are no case reports on the colonization of a pre-transplant lung by drug-resistant Acinetobacter baumannii. We report a case of extensively drug resistant (XDR) A. baumannii colonization in the tracheobronchial tree that caused severe infectious complications after bilateral lung transplantation. A 23-year-old man diagnosed with bronchiolitis obliterans syndrome (BOS) 4 years earlier with a history of allogenic bone marrow transplantation for acute lymphoblastic leukemia was admitted to the hospital with dyspnea. Due to progressive hypercapnic respiratory failure, long-term mechanical ventilation was started after a tracheostomy was performed, and the patient underwent a bilateral lung transplantation to treat end-stage BOS. After the transplantation, the colonization of XDR A. baumannii caused severe bacterial pneumonia in the early postoperative period. Combined treatment with colistin and meropenem led to recovery from the pneumonia but caused drug-induced renal failure. Because many centers are willing to transplant candidates who are on mechanical ventilation or extracorporeal life support, the incidence of XDR A.
baumannii colonization of pretransplant lungs is expected to increase. Further studies are needed to examine pre-transplant management strategies in patients colonized with XDR A. baumannii.
Hemophagocytic lymphohistiocytosis (HLH) is a rare but fatal complication after solid organ transplantation. Acquired forms of HLH are described in association with severe sepsis, autoimmune disorders, malignancy, immune-compromised states, infections, and solid organ transplantation. We experienced a case of hemophagocytic lymphohistiocytosis after bilateral lung transplantation. Leukopenia, thrombocytopenia, and hyperbilirubinemia were noted and became aggravated 50 days after transplantation. Diagnosis of HLH was based on clinical and laboratory findings of splenomegaly, cytopenia, elevated ferritin, elevated interleukin-2 receptor, and hemophagocytosis in bone marrow. Other features such as elevated bilirubin, lactate dehydrogenase, and D-dimer which can be present in HLH were also noted. The patient was immediately treated with etoposide and dexamethasone. Despite aggressive therapy, the patient deteriorated and died. Awareness of the diagnostic criteria of HLH after lung transplantation is important for clinicians.
BACKGROUND Weaning from mechanical ventilation is difficult in the intensive care unit (ICU). Many controversial questions remain unanswered concerning the predictors of weaning failure. This study investigates patient characteristics and delayed weaning after lung transplantation. METHODS This study retrospectively reviewed the medical records of 17 lung transplantation patients from October 2012 to December 2013. Patients able to be weaned from mechanical ventilation within 8 days after surgery were assigned to an early group (n = 9), and the rest of the patients were assigned to the delayed group (n=8). Patients' intraoperative and postoperative characteristics were collected and analyzed, and conventional weaning predictors, including rapid shallow breathing index (RSBI), were also assessed. RESULTS The results of the early group showed a significantly shorter ICU stay in addition to a shorter hospitalization overall. Notably, the early group had a higher body mass index (BMI) than the delayed group (20.7 vs. 16.9, p = 0.004). In addition, reopening occurred more frequently in the delayed group (1/9 vs. 5/8, p = 0.05).
During spontaneous breathing trials, tidal volume (TV) and arterial oxygen tension were significantly higher in the early group compared to the delayed weaning group, but differences in RSBI and respiratory rate (RR) between groups were not statistically significant. CONCLUSIONS Low BMI might be associated with delayed ventilator weaning in lung transplantation patients. In addition, instead of the traditional weaning predictors of RSBI and RR, TV might be a better predictor for ventilator weaning after lung transplantation.
When patients with severe respiratory failure are treated with venovenous extracorporeal membrane oxygenation (VV-ECMO), severe pulmonary hypertension due to right ventricular (RV) failure is possible. This is a serious complication that requires immediate therapeutic intervention. We report an extraordinary experience of additional venoarterial extracorporeal membrane oxygenation (VA-ECMO) support for RV failure in a patient who was being treated with VV-ECMO as a bridge to lung transplantation. A 61-year-old man was diagnosed with acute exacerbation of idiopathic pulmonary fibrosis. While waiting for lung transplantation, he was placed on VV-ECMO and developed RV failure. After insertion of additional VA ECMO, RV dysfunction was dramatically improved. He underwent heart-lung transplantation after 23 days of dual ECMO support.
Extracorporeal membrane oxygenation (ECMO) is a means for supporting adequate gas exchange in patients with severe respiratory failure and is the only therapeutic option for ventilation-refractory patients awaiting lung transplantation. Moreover, defining the patients likely to benefit from ECMO as a bridge to transplantation has recently become a point of interest. Here, we report a case of prolonged ECMO support to a patient awaiting lung transplantation. A 66-year-old woman was diagnosed with acute interstitial pneumonia and was placed on veno-venous (VV) ECMO due to unsatisfactory gas exchange despite maximal ventilator care. She underwent bilateral lung transplantation after 99 days of ECMO and was successfully weaned from it on the 107th ECMO day. This is the longest period of ECMO support to be reported among elderly patients.
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Burkholderia cepacia is a highly virulent pathogen known to cause opportunistic infections in immunocompromised patients. It accelerates lung disease and causes necrotizing pneumonia with associated severe sepsis, known as cepacia syndrome. In particular, lung transplant recipients infected with Burkholderia cepacia show higher mortality after lung transplantation than those who are not infected with this organism. Due to broad-spectrum antibiotic resistance, a combination therapy should be used according to the results of the susceptibility test. This bacterial infection is rare in Korea, and no case was reported in lung transplant recipients. However, we report a case of pneumonia caused by Burkholderia cepacia after lung transplantation. As Burkholderia cepacia was grown from a sputum culture, the patient was treated initially with a combination of meropenem and trimethoprim/sulfamethoxazole and then ceftazidime and trimethoprim/sulfamethoxazole as a result of leukopenia. After antibiotics treatment for 20 days, sputum cultures became negative for Burkholderia cepacia and the patient successfully recovered.
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