(Press-News.org) Extracorporeal membrane oxygenation (ECMO) is a widely used advanced life support procedure that provides cardiac and respiratory support to critically ill patients. ECMO use has been increasing exponentially over the last decade as it has shown success in resuscitating patients in critical situations like the COVID-19 pandemic and is now a lifesaving treatment modality in intensive care units (ICUs). However, prolonged ECMO use may be associated with an increased risk of mortality. Identifying risk factors for in-hospital mortality and developing standardized nursing practice guidelines for ECMO management may improve the survival rates in patients.
In this vein, a group of researchers led by Professor Youn-Jung Son from Chung-Ang University, South Korea, set out to study the prevalence and risk factors associated with the 30-day in-hospital mortality in critically ill adult Korean patients on ECMO. This paper was made available online on July 12, 2023 and will be published in Volume 79 of the journal Intensive and Critical Care Nursing on 1st December 2023.
“In-hospital mortality due to ECMO support, regardless of its type, has not been well reported in Korea. Thus, it is crucial to provide training to various stakeholders in Korea (e.g., ICU nurses) to enhance collaboration, particularly for the optimal ECMO management to reduce in-hospital mortality or improve the survival rate post- hospital discharge.” explains Prof. Son.
They conducted a retrospective cohort study in a single tertiary-care university hospital between May 2020 and April 2021. Patients were screened using their electronic medical records, and 148 patients aged 18 years or above, who received ECMO support for at least 48 hours, were included in the study. Based on their 30-day in-hospital survival status following ECMO initiation, the researchers categorized the patients as survivors and non-survivors. Various pre-ECMO and post-ECMO (up to 30 days from the day of initiation) parameters were collected and compared.
The 30-day mortality rate is used to measure performance in clinical settings. In the current study, the researchers found the 30-day in-hospital mortality rate to be 49.3%, with heart and multi-organ failures identified as the most common causes of death. Furthermore, the average duration of ECMO support was approximately 11 days, and the in-hospital median survival was 13 days. This finding emphasizes the importance of early detection of risk factors for mortality to improve patient outcomes.
Further investigations found significant differences in various pre-ECMO and post-ECMO parameters between survivors and non-survivors. Statistical analyses revealed that ECMO weaning failure, new-onset renal failure, and a lower average mean arterial pressure (MAP) of <65 mmHg post-ECMO were associated with an increased risk of 30-day in-hospital mortality rate. Among these factors, ECMO weaning failure was identified as the strongest predictor of death in patients requiring ECMO.
Interestingly, this is the first retrospective cohort study to investigate the prevalence and risk factors associated with 30-day in-hospital mortality in a Korean sample. The current study reveals that vigilant monitoring of post-ECMO renal function and average MAP is the key to minimize the death rate, especially within the first two weeks of ECMO initiation. Additionally, the ECMO team must work together and cooperate for successful ECMO weaning for higher survival rates.
Patients on ECMO are usually cared for by ECMO specialist nurses or ICU nurses, who hold certifications in this area. However, in Korea, ICU nurses are the primary medical staff caring for ECMO patients, yet there are no specific training modules or qualification exams for this role. This study highlights the role of ICU nurses in reducing ECMO mortality rates and provides significant evidence-based framework for development of nursing practice guidelines.
Elaborating on the long-term impacts of their study, Prof. Youn-Jung concludes, “The results of our study provide sufficient evidence for developing standardized nursing practice guidelines that may provide patients with appropriate care at each point in their ECMO journey, thereby improving patient safety and reducing hospital mortality in critically ill adults on ECMO.” Furthermore, these findings could be the foundation for development of multifaceted interventions that can contribute to the improvement of health-related quality of life in patients discharged from ECMO. Finally, by reducing adverse events in patients on ECMO, unnecessary healthcare expenditures for individuals and various countries can be reduced.
Authors: Youngeon Lee a, Insil Jang b, Joonhwa Hong c, Youn-Jung Son b
a Emergency Intensive Care Unit, Department of Nursing, Chung-Ang University Hospital, 102 Heukseok-ro, Dongjak-gu, Seoul 06973, South Korea
b Red Cross College of Nursing, Chung-Ang University, 84 Heukseok ro, Dongjak-gu, Seoul 06974, South Korea
c Department of Thoracic and Cardiovascular Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, 84 Heukseok ro, Dongjak-gu, Seoul 06974, South Korea
About Chung-Ang University
Chung-Ang University is a private comprehensive research university located in Seoul, South Korea. It was started as a kindergarten in 1916 and attained university status in 1953. It is fully accredited by the Ministry of Education of Korea. Chung-Ang University conducts research activities under the slogan of “Justice and Truth.” Its new vision for completing 100 years is “The Global Creative Leader.” Chung-Ang University offers undergraduate, postgraduate, and doctoral programs, which encompass a law school, management program, and medical school; it has 16 undergraduate and graduate schools each. Chung-Ang University’s culture and arts programs are considered the best in Korea.
About Professor Youn-Jung Son
Youn-Jung Son is a Professor at Cross College of Nursing, Chung-Ang University. Son and her research team are interested in reducing adverse events among patients with critical illness, especially cardiovascular diseases. She has also been working on developing dyadic intervention considering health literacy for improving adherence to self-care behaviors of patients with chronic heart failure after hospital discharge. Recently, her research team has been studying on identifying risk factors of frailty and sarcopenia among patients with cardiovascular diseases using electronic medical records or survey data. Prof. Son has nearly 240 publications to her credit, with an impressive h-index of 30.
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