Bibliometric and visual analysis of intestinal ischemia reperfusion from 2004 to 2022

FIGURE 1. Trends in the publication and citation frequency of intestinal I/R-related literature (2004–2022). The number of publications fluctuates between 30 and 80, with a maximum value in 2020 and an average of more than 66 in the last decade. The overall upward trend in citation frequency is observed.

FIGURE 2. (A) Countries or regions involved in the study of intestinal I/R. (B) Visualization diagram of each country/region regarding intestinal I/R. Applying VOSviewer, the collaborative network of countries/regions. Different nodes represent different countries or regions. Different colors represent clusters with different affinities. Publications of countries was shown in the sizes of nodes. The ten sets are marked in different colors: China, Finland, France, Pakistan (purple); United States, Israel, Russia, India, Portugal (blue); Germany, Switzerland, Austria, Hungary (light blue); Brazil, Australia, Scotland, Denmark (yellow); Canada, Taiwan, Italy, Iceland (orange); England, Greece, Thailand (brown); Netherlands, Belgium, Tunisia, Saudi Arabia, Egypt (green); Japan, Sweden, Norway (pink); Spain, Slovakia, Korea, Bulgaria, Czechia, and Argentina (red).

FIGURE 3. Visualization diagram of each institutions regarding intestinal I/R. Applying VOSviewer, the collaborative network of institutions. Different nodes represent different institutions. Different colors represent clusters with different affinities. Sizes of nodes ars based on publications of institutions.

FIGURE 4. Visualization of association graphs of co-authors and co-cited authors in intestinal I/R. (A) Network visualization diagram of collaboration among authors. Sizes of nodes represent publications of authors. Different colors each represent a closer collaborative relationship. The thickness of the inter-author linkage represents the strength of the relationship. (B) Network of co-cited authors. Sizes of nodes represent co-citations of authors. Chiu, Cj has the highest number of co-citations.

FIGURE 5. Visualization of the relationship between co-cited journals. One node represents one journal, and the area means the citation frequency. Sizes of nodes are reflected with co-citations.

FIGURE 6. (A) Biplot of published and cited literature journals, with published journals on the left and cited journals on the right. CiteSpace was applied to analyze (B) the citation relationship between the subject areas in which the literature was published and (C) clustered. Sizes of nodes represent publications of subject in (B) and (C). The betweenness centrality of a node in the network measures the importance of the position of the node in the network, in (B). Clustering module value (Q value), using in CiteSpace cluster analysis, it is generally considered that Q > 0.3 means that the clustering structure is significant, shown line 10 in top left of (C). The average contour value of clustering (S value), in line 11, it is generally considered that S > 0.5 clustering class is reasonable and S > 0.7 means that the clustering is convincing.

FIGURE 7. (A) Application of CiteSpace, literature relationship network diagram. The different colors of the nodes represent additional years, from purple to yellow, the later the time. In addition, the red nodes represent literature with citation burst. The node size represents the citation frequency. (B) Clustering of the literature in the literature relationship network graph, with a total of 17 clusters. (C) Top 25 high burst of cited literature. The blue line indicates the timeline, and the red phase represents the outbreak period. It is based on the burst test to detect sudden changes in information like documents and keywords. In CiteSpace, the burst test is developed by Kleinberg J. The meanings of the burst test represent a sharp increase in document citations and some critical questions in the field proposed or solved in the documents.

FIGURE 8. Keyword co-occurrence network relationship diagram. Ischemia/reperfusion has most co-occurrence with others keywords.

FIGURE 9. (A) Top 25 keywords with the strongest citation frequency burst. (B) Visualization map of timeline viewer related to intestinal I/R produced by CiteSpace, expanding the literature clustering by timeline and marking the first occurrence time of each critical keyword.