Bibliometric and visual analysis of intraoperative hypotension from 2004 to 2022

Figures

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  Figure 1. Trends in the publication and citation frequency of IOH-related literature (2004–2022).

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  Figure 2. Visualization diagram of each country/region regarding IOH. (A) Countries/regions involved in IOH-related research. The links between countries/regions indicate their collaborations and connections. (B) Analysis of 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.

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  Figure 3. Visualization diagram of each institution regarding IOH. Applying VOSviewer, the collaborative network of institutions. Different nodes represent different institutions. Different colors represent clusters with different affinities. Node size represents the publication volume of the institution.

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  Figure 4. Visualization of association graphs of co-authors and co-cited authors in IOH. (A) Visualization of the network of collaboration between authors. The size of the node represents the publication of the author. Identical colors represent internal connections within clusters. The thickness of the line between the authors represents the closeness of the cooperative relationship. (B) Network of co-cited authors. Sizes of nodes represent the association intensity of co-cited authors.

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  Figure 5. The node size represented the number of papers published, and the line represented the cooperation. Different colors each represent a closer cooperative relationship.

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  Figure 6. (A) Application of citespace, literature relation network diagram. The different colors of the nodes indicate additional years, from purple to yellow, the later. The node size indicates the frequency of the reference. (B) The heat topic view of keywords. The smaller the number is, the larger the cluster, with #0 being the largest cluster. Nodes size reflects co-citation frequency, and the links between nodes indicate co-citation relationships.

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  Figure 7. (A) Association between the top 20 citation bursts. (B) The top 25 references with the strongest citation bursts.

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  Figure 8. (A) Keyword co-occurrence network relationship diagram. hypotension has most co-occurrence with others keywords. Heatmap analysis of IOH-related keywords. (B) Annual heatmap from 2004 to 2022. The annual heat value of each keyword is obtained by dividing the number of citations in that year by the total number of citations in that year. (C) Keyword relevance heatmap. Keywords with high popularity in similar time periods are clustered into one category and marked with different colors.

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  Figure 9. (A) Thematic evolution cutting in 4 phases. Keywords are ranged according lengths of keywords representing occurences. (B) Conceptual structure map using method MCA. Different colors mean different clusters. (C) Thematic map. Different colors mean different clusters, and X axis shows relevance degree as well as Y axis shows development degree.