John A. Ryan
Impact in
- Nephrology top 1%
- Emergency Medical Services top 0.5%
- Central Venous Catheters and Hemodialysis
Papers in
- Co-authors
- Patrick C. Freeny (9 shared papers)Josef E. Fischer (7 shared papers)L. William Traverso (10 shared papers)William M. Abbott (6 shared papers)Ronald M. Abel (6 shared papers)Richard A. Kozarek (10 shared papers)William Marks (2 shared papers)David J. Patterson (5 shared papers)
- Journals
- The American Journal of Surgery (26 papers)Gastroenterology (3 papers)Radiology (3 papers)The Journal of Urology (3 papers)Annals of Surgery (3 papers)
- Partner nations
- United StatesUnited Kingdom
In The Last Decade
John A. Ryan
65 papers receiving 4.1k citations
John A. Ryan's Hit Papers
Peers
Comparison fields: 5 of 114
- Nephrology 449
- Emergency Medical Services 393
- Oncology 1.4k
- Surgery 1.9k
- Nutrition and Dietetics 685
Countries citing papers authored by John A. Ryan
This map shows the geographic impact of John A. Ryan'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 John A. Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John A. Ryan more than expected).
Fields of papers citing papers by John A. Ryan
This network shows the impact of papers produced by John A. Ryan. 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 John A. Ryan. The network helps show where John A. Ryan may publish in the future.
Co-authors
The 25 scholars most cited alongside John A. Ryan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 67 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | Catheter Complications in Total Parenteral Nutrition Hit paper breakdown → | 1974 | 601 |
| 2 | Improved Survival from Acute Renal Failure after Treatment with Intravenous Essential L-Amino Acids and Glucose Hit paper breakdown → | 1973 | 390 |
| 3 | 1986 | 259 | |
| 4 | 1988 | 256 | |
| 5 | 1991 | 248 | |
| 6 | 1998 | 209 | |
| 7 | 1993 | 199 | |
| 8 | 1978 | 196 | |
| 9 | 1980 | 138 | |
| 10 | 1987 | 138 | |
| 11 | 1973 | 131 | |
| 12 | 2014 | 112 | |
| 13 | 1988 | 111 | |
| 14 | 1976 | 105 | |
| 15 | 1988 | 103 | |
| 16 | 1999 | 88 | |
| 17 | 2001 | 83 | |
| 18 | Long-term survival in patients undergoing percutaneous endoscopic gastrostomy and jejunostomy. | 1990 | 81 |
| 19 | 1991 | 71 | |
| 20 | 1997 | 71 |
About John A. Ryan
John A. Ryan is a scholar working on Surgery, Oncology, Pulmonary and Respiratory Medicine, Nutrition and Dietetics and Nephrology, having authored 67 papers that have together received 4.6k indexed citations. Recurring topics across this work include Pancreatic and Hepatic Oncology Research (18 papers), Pancreatitis Pathology and Treatment (10 papers), Gallbladder and Bile Duct Disorders (8 papers), Clinical Nutrition and Gastroenterology (8 papers), Parathyroid Disorders and Treatments (6 papers), Hepatocellular Carcinoma Treatment and Prognosis (5 papers), Colorectal Cancer Surgical Treatments (4 papers) and Metabolism and Genetic Disorders (4 papers). The work is most often cited by research in Nephrology (449 citations), Emergency Medical Services (393 citations), Oncology (1.4k citations), Surgery (1.9k citations) and Nutrition and Dietetics (685 citations). John A. Ryan has collaborated with scholars based in United States and United Kingdom. Frequent co-authors include Patrick C. Freeny, Josef E. Fischer, L. William Traverso, William M. Abbott, Ronald M. Abel, Richard A. Kozarek, William Marks, David J. Patterson, Thomas McC. Chesney and Cyrus C. Hopkins. Their work appears in journals such as The American Journal of Surgery, Gastroenterology, Radiology, The Journal of Urology and Annals of Surgery.
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.