John A. Ryan
Impact in
- Nutrition and Dietetics top 1%
- Clinical Nutrition and Gastroenterology
- Emergency Medical Services top 0.5%
- Central Venous Catheters and Hemodialysis
Papers in
- Surgery 24
- Thyroid and Parathyroid Surgery 6
- Pancreatitis Pathology and Treatment 5
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- Clinical Nutrition and Gastroenterology 8
- Co-authors
- L. William Traverso (9 shared papers)Patrick C. Freeny (8 shared papers)Josef E. Fischer (7 shared papers)Ronald M. Abel (6 shared papers)William M. Abbott (6 shared papers)Richard A. Kozarek (8 shared papers)William M. Marks (2 shared papers)Terrence J. Ball (5 shared papers)
- Journals
- The American Journal of Surgery (26 papers)Annals of Surgery (3 papers)Radiology (3 papers)The Journal of Urology (3 papers)New England Journal of Medicine (2 papers)
- Partner nations
- United States
In The Last Decade
John A. Ryan
60 papers receiving 4k citations
John A. Ryan's Hit Papers
Peers
Comparison fields: 5 of 93
- Nutrition and Dietetics 794
- Emergency Medical Services 369
- Oncology 1.2k
- Surgery 1.2k
- Nephrology 240
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 61 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | Catheter Complications in Total Parenteral Nutrition Hit paper breakdown → | 1974 | 605 |
| 2 | Improved Survival from Acute Renal Failure after Treatment with Intravenous Essential L-Amino Acids and Glucose Hit paper breakdown → | 1973 | 387 |
| 3 | 1991 | 272 | |
| 4 | 1986 | 258 | |
| 5 | 1988 | 258 | |
| 6 | 1998 | 214 | |
| 7 | 1978 | 200 | |
| 8 | 1993 | 198 | |
| 9 | 1987 | 141 | |
| 10 | 1980 | 137 | |
| 11 | 1973 | 127 | |
| 12 | 2014 | 120 | |
| 13 | 1988 | 113 | |
| 14 | 1988 | 105 | |
| 15 | 1976 | 103 | |
| 16 | 1999 | 86 | |
| 17 | Long-term survival in patients undergoing percutaneous endoscopic gastrostomy and jejunostomy. | 1990 | 83 |
| 18 | 2001 | 81 | |
| 19 | 1991 | 72 | |
| 20 | 1997 | 71 |
About John A. Ryan
John A. Ryan is a scholar working on Surgery, Nutrition and Dietetics, Oncology, Pulmonary and Respiratory Medicine and Hepatology, having authored 61 papers that have together received 4.6k indexed citations. Recurring topics across this work include Clinical Nutrition and Gastroenterology (8 papers), Pancreatic and Hepatic Oncology Research (6 papers), Thyroid and Parathyroid Surgery (6 papers), Colorectal Cancer Surgical Treatments (5 papers), Gallbladder and Bile Duct Disorders (5 papers), Pancreatitis Pathology and Treatment (5 papers), Acute Kidney Injury Research (3 papers) and Hepatocellular Carcinoma Treatment and Prognosis (3 papers). The work is most often cited by research in Nutrition and Dietetics (794 citations), Emergency Medical Services (369 citations), Oncology (1.2k citations), Surgery (1.2k citations) and Nephrology (240 citations). John A. Ryan has collaborated with scholars based in United States. Frequent co-authors include L. William Traverso, Patrick C. Freeny, Josef E. Fischer, Ronald M. Abel, William M. Abbott, Richard A. Kozarek, William M. Marks, Terrence J. Ball, RITA COLLEY and Cyrus C. Hopkins. Their work appears in journals such as The American Journal of Surgery, Annals of Surgery, Radiology, The Journal of Urology and New England Journal of Medicine.
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.