Guntram Lock

1.5k total citations
41 papers, 1.1k citations indexed

About

Guntram Lock is a scholar working on Surgery, Epidemiology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Guntram Lock has authored 41 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Surgery, 9 papers in Epidemiology and 8 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Guntram Lock's work include Abdominal vascular conditions and treatments (7 papers), Liver Disease Diagnosis and Treatment (7 papers) and Liver Disease and Transplantation (4 papers). Guntram Lock is often cited by papers focused on Abdominal vascular conditions and treatments (7 papers), Liver Disease Diagnosis and Treatment (7 papers) and Liver Disease and Transplantation (4 papers). Guntram Lock collaborates with scholars based in Germany, Australia and Switzerland. Guntram Lock's co-authors include Jürgen Schölmerich, Claus Hellerbrand, Klaus‐Peter Dieckmann, Rainer H. Straub, Axel Holstege, Hans Herfarth, B. Zietz, Johannes Grossmann, Marcus Mühlbauer and Wolfgang E. Thasler and has published in prestigious journals such as New England Journal of Medicine, Gastroenterology and Hepatology.

In The Last Decade

Guntram Lock

36 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Guntram Lock Germany 17 446 302 278 171 168 41 1.1k
Sumio Saito Japan 21 511 1.1× 497 1.6× 398 1.4× 250 1.5× 53 0.3× 66 1.2k
Jui‐Wei Lin Taiwan 22 465 1.0× 68 0.2× 276 1.0× 236 1.4× 152 0.9× 71 1.5k
Konstantinos Tepetes Greece 21 889 2.0× 254 0.8× 163 0.6× 312 1.8× 90 0.5× 120 1.3k
Kinjiro Sumiyoshi Japan 8 688 1.5× 170 0.6× 198 0.7× 455 2.7× 79 0.5× 13 1.2k
F Blanc France 20 246 0.6× 490 1.6× 379 1.4× 231 1.4× 280 1.7× 53 1.4k
Hiroki Ohzato Japan 15 520 1.2× 146 0.5× 134 0.5× 190 1.1× 18 0.1× 68 1.1k
Alper Yurçi Türkiye 15 125 0.3× 84 0.3× 215 0.8× 55 0.3× 81 0.5× 31 685
N J Lygidakis Greece 25 1.1k 2.5× 373 1.2× 259 0.9× 606 3.5× 23 0.1× 98 1.8k
Michael Lin Australia 15 254 0.6× 104 0.3× 559 2.0× 214 1.3× 25 0.1× 54 1.4k
Jin Lee South Korea 15 300 0.7× 97 0.3× 116 0.4× 189 1.1× 20 0.1× 64 689

Countries citing papers authored by Guntram Lock

Since Specialization
Citations

This map shows the geographic impact of Guntram Lock'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 Guntram Lock with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Guntram Lock more than expected).

Fields of papers citing papers by Guntram Lock

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Guntram Lock. 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 Guntram Lock. The network helps show where Guntram Lock may publish in the future.

Co-authorship network of co-authors of Guntram Lock

This figure shows the co-authorship network connecting the top 25 collaborators of Guntram Lock. A scholar is included among the top collaborators of Guntram Lock 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 Guntram Lock. Guntram Lock 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.
Philipp, R, Uwe Koch, Karin Oechsle, et al.. (2025). Existential distress in advanced cancer: A cohort study. General Hospital Psychiatry. 94. 184–191. 1 indexed citations
2.
Schmidt, Christa K., et al.. (2024). Routine colonoscopy with a surprise in the cecum: It’s a giant appendicolith! A Case report and review of the literature. Zeitschrift für Gastroenterologie. 63(2). 139–144. 1 indexed citations
3.
Lock, Guntram, et al.. (2017). Central Anticholinergic Syndrome after Propofol Sedation for Upper GI Endoscopy. The American Journal of Gastroenterology. 112(8). 1350–1350.
4.
Lock, Guntram, et al.. (2016). Straight Vessel Pattern and Rapid Filling Time. Journal of Ultrasound in Medicine. 35(7). 1593–1599. 9 indexed citations
5.
Dieckmann, Klaus‐Peter, Ulrich H. Frey, & Guntram Lock. (2013). Contemporary diagnostic work-up of testicular germ cell tumours. Nature Reviews Urology. 10(12). 703–712. 46 indexed citations
6.
Lock, Guntram, et al.. (2011). Early Experience With Contrast-enhanced Ultrasound in the Diagnosis of Testicular Masses: A Feasibility Study. Urology. 77(5). 1049–1053. 65 indexed citations
7.
Rath, Heiko C., Antje Timmer, Esther Endlicher, et al.. (2004). Comparison of interobserver agreement for different scoring systems for reflux esophagitis: impact of level of experience. Gastrointestinal Endoscopy. 60(1). 44–49. 39 indexed citations
8.
Zietz, B., Guntram Lock, Wolfgang Drobnik, et al.. (2003). Dysfunction of the hypothalamic-pituitary-glandular axes and relation to Child-Pugh classification in male patients with alcoholic and virus-related cirrhosis. European Journal of Gastroenterology & Hepatology. 15(5). 495–501. 88 indexed citations
9.
Hellerbrand, Claus, Andreas Pöppl, Arndt Hartmann, Jürgen Schölmerich, & Guntram Lock. (2003). HFE C282Y heterozygosity in hepatocellular carcinoma: evidence for an increased prevalence. Clinical Gastroenterology and Hepatology. 1(4). 279–284. 53 indexed citations
10.
Mühlbauer, Marcus, Anja‐Katrin Bosserhoff, Arndt Hartmann, et al.. (2003). A novel MCP-1 gene polymorphism is associated with hepatic MCP-1 expression and severity of HCV-related liver disease. Gastroenterology. 125(4). 1085–1093. 176 indexed citations
11.
Lock, Guntram. (2002). Die akute mesenteriale Ischämie – häufig übersehen und häufig letal. Medizinische Klinik. 97(7). 402–409. 3 indexed citations
12.
Kullmann, Frank, et al.. (2001). Brain electrical activity mapping of EEG for the diagnosis of (sub)clinical hepatic encephalopathy in chronic liver disease. European Journal of Gastroenterology & Hepatology. 13(5). 513–522. 35 indexed citations
13.
Braden, Barbara, et al.. (2001). Qualitative and quantitative clinical evaluation of the laser-assisted ratio analyser for detection of Helicobacter pylori infection by 13C-urea breath tests. European Journal of Gastroenterology & Hepatology. 13(7). 807–810. 15 indexed citations
14.
Zietz, B., et al.. (2001). Early shifts of adrenal steroid synthesis before and after relief of short-term cholestasis. Journal of Hepatology. 35(3). 329–337. 15 indexed citations
15.
Lock, Guntram. (2001). Physiology and pathology of the oesophagus in the elderly patient. Best Practice & Research Clinical Gastroenterology. 15(6). 919–941. 10 indexed citations
16.
Hellerbrand, Claus, Arndt Hartmann, Antje Knöll, et al.. (2001). Hepatocellular Carcinoma in Southern Germany: Epidemiological and Clinicopathological Characteristics and Risk Factors. Digestive Diseases. 19(4). 345–351. 32 indexed citations
17.
Völk, Markus, et al.. (1999). Post-traumatic pseudocyst of the spleen: Sclerotherapy with ethanol. CardioVascular and Interventional Radiology. 22(3). 246–248. 21 indexed citations
18.
Lock, Guntram, Roman Pfeifer, Rainer H. Straub, et al.. (1998). Association of Esophageal Dysfunction and Pulmonary Function Impairment in Systemic Sclerosis. The American Journal of Gastroenterology. 93(3). 341–345. 59 indexed citations
19.
Lock, Guntram, M. Zeuner, B. Lang, et al.. (1997). Anorectal function in systemic sclerosis. Diseases of the Colon & Rectum. 40(11). 1328–1335. 21 indexed citations
20.
Straub, Rainer H., Tilo Andus, Guntram Lock, et al.. (1997). Kardiovaskuläre und pupilläre autonome und somatosensible Neuropathie bei chronischen Erkrankungen mit Autoimmunphänomenen. Medizinische Klinik. 92(11). 647–653. 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Sumio Saito Breakdown of academic impact, for papers by Jui‐Wei Lin Breakdown of academic impact, for papers by Konstantinos Tepetes Breakdown of academic impact, for papers by Kinjiro Sumiyoshi Breakdown of academic impact, for papers by F Blanc Breakdown of academic impact, for papers by Hiroki Ohzato Breakdown of academic impact, for papers by Alper Yurçi Breakdown of academic impact, for papers by N J Lygidakis Breakdown of academic impact, for papers by Michael Lin Breakdown of academic impact, for papers by Jin Lee
Rankless by CCL
2026