Ranjith Kumar Sivakumar

627 total citations
25 papers, 159 citations indexed

About

Ranjith Kumar Sivakumar is a scholar working on Surgery, Pathology and Forensic Medicine and Epidemiology. According to data from OpenAlex, Ranjith Kumar Sivakumar has authored 25 papers receiving a total of 159 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Surgery, 6 papers in Pathology and Forensic Medicine and 4 papers in Epidemiology. Recurrent topics in Ranjith Kumar Sivakumar's work include Anesthesia and Pain Management (15 papers), Spine and Intervertebral Disc Pathology (6 papers) and Nausea and vomiting management (5 papers). Ranjith Kumar Sivakumar is often cited by papers focused on Anesthesia and Pain Management (15 papers), Spine and Intervertebral Disc Pathology (6 papers) and Nausea and vomiting management (5 papers). Ranjith Kumar Sivakumar collaborates with scholars based in Hong Kong, China and India. Ranjith Kumar Sivakumar's co-authors include Manoj K. Karmakar, Amudha Kumar, Vignesh Chidambaram, Marie Gilbert Majella, Petros C. Karakousis, Kenneth Sheah, Per‐Arne Lönnqvist, Jawahar L. Mehta, Xavier Sala‐Blanch and Miguel Ángel Reina and has published in prestigious journals such as Clinical Infectious Diseases, Anesthesia & Analgesia and EBioMedicine.

In The Last Decade

Ranjith Kumar Sivakumar

20 papers receiving 159 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ranjith Kumar Sivakumar Hong Kong 8 95 53 25 23 21 25 159
Mohamed Helmy Egypt 6 25 0.3× 30 0.6× 18 0.7× 10 0.4× 7 0.3× 14 119
Jean-Paul Ory Belgium 7 93 1.0× 28 0.5× 7 0.3× 11 0.5× 27 1.3× 19 154
Roberto Saad Brazil 8 80 0.8× 26 0.5× 23 0.9× 6 0.3× 3 0.1× 35 219
R. Hassani Morocco 6 82 0.9× 45 0.8× 10 0.4× 14 0.6× 6 0.3× 13 127
Pierre‐Olivier Ludes France 6 40 0.4× 16 0.3× 25 1.0× 4 0.2× 11 0.5× 8 140
Irina A. Mandel Russia 6 19 0.2× 39 0.7× 8 0.3× 64 2.8× 7 0.3× 26 135
Bryan Rudolph United States 7 99 1.0× 29 0.5× 75 3.0× 8 0.3× 29 1.4× 22 214
Carolijn Kapoen United States 4 84 0.9× 62 1.2× 9 0.4× 37 1.6× 2 0.1× 5 156
Oren P. Schaefer United States 8 38 0.4× 28 0.5× 49 2.0× 20 0.9× 16 0.8× 16 216
Toshio Osamura Japan 7 124 1.3× 22 0.4× 12 0.5× 12 0.5× 22 175

Countries citing papers authored by Ranjith Kumar Sivakumar

Since Specialization
Citations

This map shows the geographic impact of Ranjith Kumar Sivakumar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ranjith Kumar Sivakumar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ranjith Kumar Sivakumar more than expected).

Fields of papers citing papers by Ranjith Kumar Sivakumar

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ranjith Kumar Sivakumar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ranjith Kumar Sivakumar. The network helps show where Ranjith Kumar Sivakumar may publish in the future.

Co-authorship network of co-authors of Ranjith Kumar Sivakumar

This figure shows the co-authorship network connecting the top 25 collaborators of Ranjith Kumar Sivakumar. A scholar is included among the top collaborators of Ranjith Kumar Sivakumar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ranjith Kumar Sivakumar. Ranjith Kumar Sivakumar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Karmakar, Manoj K., et al.. (2025). Comparison of two real-time ultrasound-guided dural puncture techniques for spinal anesthesia: a randomized clinical trial. Regional Anesthesia & Pain Medicine. rapm–2025.
2.
Sivakumar, Ranjith Kumar, et al.. (2025). Clinical Characteristics and Outcomes of Children with Unilateral Multicystic Dysplastic Kidney: A Cohort Study. Indian Pediatrics. 62(3). 203–209. 1 indexed citations
3.
Sivakumar, Ranjith Kumar, et al.. (2025). The Emerging Role of Adropin in Neurological Health: A Systematic Review. Iranian Journal of Public Health. 54(4). 675–687.
4.
5.
Sivakumar, Ranjith Kumar, et al.. (2024). Differential nerve blockade to explain anterior thoracic analgesia without sensory blockade after an erector spinae plane block may be wishful thinking. Regional Anesthesia & Pain Medicine. 49(7). 536–539. 4 indexed citations
6.
7.
Sivakumar, Ranjith Kumar & Manoj K. Karmakar. (2023). Spinal sonography and central neuraxial blocks. Best Practice & Research Clinical Anaesthesiology. 37(2). 209–242. 2 indexed citations
8.
9.
Karmakar, Manoj K., et al.. (2023). Ultrasound-guided thoracic paravertebral block using a transverse in-plane approach at the level of the inferior articular process: a retrospective review of complications. Regional Anesthesia & Pain Medicine. 49(10). 770–772. 2 indexed citations
10.
Chidambaram, Vignesh, Amudha Kumar, Marie Gilbert Majella, et al.. (2022). Association of Lipid Levels With COVID-19 Infection, Disease Severity and Mortality: A Systematic Review and Meta-Analysis. Frontiers in Cardiovascular Medicine. 9. 862999–862999. 28 indexed citations
11.
Kumar, Amudha, Ranjith Kumar Sivakumar, Vignesh Chidambaram, et al.. (2022). Prolactin Inhibition in Peripartum Cardiomyopathy: Systematic Review and Meta-analysis. Current Problems in Cardiology. 48(2). 101461–101461. 8 indexed citations
12.
Chidambaram, Vignesh, Amudha Kumar, Marie Gilbert Majella, et al.. (2022). HDL cholesterol levels and susceptibility to COVID-19. EBioMedicine. 82. 104166–104166. 19 indexed citations
13.
Sivakumar, Ranjith Kumar, et al.. (2022). Manual vs. mechanical ventilation in patients with advanced airway during CPR. Indian Heart Journal. 74(5). 428–429. 1 indexed citations
14.
Songthamwat, Banchobporn, et al.. (2022). Ultrasound-guided selective trunk block (SeTB): a cadaver anatomic study to evaluate the spread of dye after a simulated injection. Regional Anesthesia & Pain Medicine. 47(7). 414–419. 2 indexed citations
15.
16.
Chidambaram, Vignesh, Amudha Kumar, Marie Gilbert Majella, et al.. (2022). Higher HDL Cholesterol Levels Decrease Susceptibility to COVID-19 Infection. SSRN Electronic Journal.
17.
Karmakar, Manoj K., et al.. (2022). The Retro Superior Costotransverse Ligament Space as a New Target for Ultrasound-Guided Intertransverse Process Block: A Report of 2 Cases. A&A Practice. 16(7). e01610–e01610. 16 indexed citations
18.
Sivakumar, Ranjith Kumar, et al.. (2022). Real-Time Ultrasound-Guided Spinal Injection Using a Transverse In-Plane Dependent Technique: A Case Series. A&A Practice. 16(7). e01596–e01596. 4 indexed citations
19.
Chidambaram, Vignesh, Marie Gilbert Majella, Samuel K. Ayeh, et al.. (2021). Male Sex Is Associated With Worse Microbiological and Clinical Outcomes Following Tuberculosis Treatment: A Retrospective Cohort Study, a Systematic Review of the Literature, and Meta-analysis. Clinical Infectious Diseases. 73(9). 1580–1588. 23 indexed citations
20.
Sivakumar, Ranjith Kumar, et al.. (2020). Dry spinal tap during real-time ultrasound-guided paramedian spinal injection with patient in the lateral decubitus position. European Journal of Anaesthesiology. 38(3). 259–264. 3 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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