Original Articles

Trends in the Extracorporeal Membrane Oxygenation Literature: A Bibliometric Analysis in the COVID-19 Era

^* Discipline of Surgery, University of Adelaide, Royal Adelaide Hospital, Adelaide, South Australia, Australia;
^† University of Adelaide, Adelaide, South Australia, Australia;
^‡ Discipline of Surgery, University of Adelaide, The Queen Elizabeth Hospital, Adelaide, South Australia, Australia; and
^§ Discipline of Surgery, University of Adelaide, Women’s and Children’s Hospital, Adelaide, South Australia, Australia

Address correspondence to: Aashray K. Gupta, Department of Cardiothoracic Surgery, Royal Adelaide Hospital, Port Road, Adelaide, South Australia 5000, Australia. E-mail: aashray.gupta@adelaide.edu.au

Received: 21 September 2021
Accepted: 16 February 2022

Abstract

Extracorporeal Membrane Oxygenation (ECMO) was first used in the 1970s. Its use is increasingly common in critical care and perioperative settings and has gained newfound prominence during COVID-19. To guide future research, we conducted a bibliometric analysis of ECMO literature. Thomson Reuters Web of Science was searched to March 7, 2021. Articles were ranked by total number of citations. Data was extracted from the 100 most cited papers relevant to ECMO for study design, topic, author, year, and institution. Journal impact factor for 2019 and Eigenfactor scores were also recorded. Our search retrieved a total of 18,802 articles. Median number of citations for the top 100 articles was 220 (range 157–1,819). These were published in 34 journals, with first authors originating from 15 countries. The Annals of Thoracic Surgery had the highest number of articles (n = 9) while Lancet publications had the most citations (n = 3,191). Use of ECMO was most commonly observed in cardiogenic shock or acute respiratory distress syndrome. United States had the greatest article output (n = 49). With 10 publications, 2013 was the most prolific year. Using linear regression, when controlled for time since publication, there was no statistically significant relationship between 2019 journal impact factor and number of article citations (p = .09). Top articles in the ECMO literature are of considerable impact and quality. As the United States produced the bulk of the prominent evidence base, and most data were regarding respiratory issues, outsized advances in ECMO may be possible within the United States during the COVID-19 era.