World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
115
Citations
46972
World Ranking
4561
National Ranking
2477

Donald O. Castell publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Donald O. Castell sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 840 publications — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Donald O. Castell D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Donald O. Castell sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 115 D-Index — 78th percentile

78% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Donald O. Castell was affiliated with the Medical University of South Carolina in the United States throughout their career. Their research primarily contributed to the field of Medicine, with a focus on Surgery, Gastroenterology, Speech and Hearing, Hepatology, and Genetics.

The primary topics associated with Donald O. Castell's work included:

  • Gastroesophageal reflux and treatments
  • Esophageal and gastrointestinal pathology
  • Eosinophilic esophagitis
  • Dysphagia assessment and management
  • Esophageal cancer research and treatment
  • Liver disease and transplantation
  • Helicobacter pylori-related gastroenterology studies

The scientist published research papers in several notable venues, with multiple contributions to:

  • Gastroenterology
  • Neurogastroenterology & Motility
  • The American Journal of Gastroenterology
  • Gut
  • World Journal of Hepatology

Recent published papers included:

  • "Normal values and regional differences in oesophageal impedance-pH metrics: a consensus analysis of impedance-pH studies from around the world," 2020, published in Gut
  • "Development of quality indicators for the diagnosis and management of achalasia," 2021, published in Neurogastroenterology & Motility
  • "Spectrum of esophageal motility disorders in patients with liver cirrhosis," 2020, published in World Journal of Hepatology
  • "Dysphagia lusoria: utility of high-resolution impedance manometry to identify true disease," 2021, published in Neurogastroenterology & Motility
  • "Editorial: simultaneous prolonged monitoring of the acid pocket and oesophageal reflux," 2020, published in Alimentary Pharmacology & Therapeutics

Frequent collaborators included Sabine Roman, Edoardo Savarino, C. Prakash Gyawali, Philip O. Katz, and Puja S. Elias, each having coauthored multiple works with the scientist.

Best Publications

  • Updated guidelines for the diagnosis and treatment of gastroesophageal reflux disease

    Kenneth R. DeVault;Donald O. Castell

  • Symptomatic gastroesophageal reflux: Incidence and precipitating factors

    Otto T. Nebel;Michael F. Fornes;Donald O. Castell

  • Gastro-oesophageal reflux monitoring: review and consensus report on detection and definitions of acid, non-acid, and gas reflux

    Daniel Sifrim;D Castell;P J Kahrilas

  • Acid and non-acid reflux in patients with persistent symptoms despite acid suppressive therapy. A multicentre study using combined ambulatory impedance-pH monitoring

    Inder Mainie;Radu Tutuian;Steven Shay;Marcelo Vela

  • Simultaneous intraesophageal impedance and pH measurement of acid and nonacid gastroesophageal reflux: Effect of omeprazole * **

    Marcelo F. Vela;Luciana Camacho-Lobato;Ramesh Srinivasan;Radu Tutuian

  • Classification of oesophageal motility abnormalities

    S J Spechler;D O Castell

  • Esophageal manometry in 95 healthy adult volunteers. Variability of pressures with age and frequency of "abnormal" contractions.

    Joel E. Richter;Wallace C. Wu;Doree N. Johns;John N. Blackwell

  • Twenty-four hour ambulatory simultaneous impedance and pH monitoring: A multicenter report of normal values from 60 healthy volunteers

    Steven Shay;Radu Tutuian;Daniel Sifrim;Marcelo Vela

  • The symptom index: a clinically important parameter of ambulatory 24-hour esophageal pH monitoring.

    Wiener Gj;Richter Je;Copper Jb;Wu Wc

  • MBS Measurement Tool for Swallow Impairment—MBSImp: Establishing a Standard

    Bonnie Martin-Harris;Martin B. Brodsky;Yvonne Michel;Donald O. Castell

  • Esophageal Testing of Patients With Noncardiac Chest Pain or Dysphagia. Results of Three Years' Experience With 1161 Patients

    Philip O. Katz;Christine B. Dalton;Joel E. Richter;Wallace C. Wu

  • Esomeprazole (40 mg) compared with lansoprazole (30 mg) in the treatment of erosive esophagitis

    Donald O Castell;Peter J Kahrilas;Joel E Richter;Nimish B Vakil

  • Abnormal sensory perception in patients with esophageal chest pain

    Joel E. Richter;Charles F. Barish;Donald O. Castell

  • Nighttime heartburn is an under-appreciated clinical problem that impacts sleep and daytime function: the results of a Gallup survey conducted on behalf of the American Gastroenterological Association

    Reza Shaker;Donald O Castell;Philip S Schoenfeld;Stuart J Spechler

  • Gastroesophageal reflux. Pathogenesis, diagnosis, and therapy

    Joel E. Richter;Donald O. Castell

  • Ambulatory 24-hour esophageal pH monitoring. Reproducibility and variability of pH parameters.

    G J Wiener;T M Morgan;J B Copper;W C Wu

  • Ineffective esophageal motility (IEM): the primary finding in patients with nonspecific esophageal motility disorder.

    Louis P. Leite;Brian T. Johnston;Jeffrey Barrett;June A. Castell

  • Ranitidine controls nocturnal gastric acid breakthrough on omeprazole: A controlled study in normal subjects

    Paolo L. Peghini;Philip O. Katz;Donald O. Castell

  • Ambulatory reflux monitoring for diagnosis of gastro-esophageal reflux disease: Update of the Porto consensus and recommendations from an international consensus group.

    S. Roman;C. P. Gyawali;E. Savarino;R. Yadlapati

  • Combined multichannel intraluminal impedance–pH monitoring to select patients with persistent gastro-oesophageal reflux for laparoscopic Nissen fundoplication

    I. Mainie;R. Tutuian;A. Agrawal;D. Adams

Frequent Co-Authors

Joel E. Richter
Joel E. Richter University of South Florida
Stuart J. Spechler
Stuart J. Spechler Baylor University Medical Center
Peter J. Kahrilas
Peter J. Kahrilas Northwestern University
John E. Pandolfino
John E. Pandolfino Northwestern University
Daniel Sifrim
Daniel Sifrim Queen Mary University of London
Edoardo Savarino
Edoardo Savarino University of Padua
Albert J. Bredenoord
Albert J. Bredenoord University of Amsterdam
Michael F. Vaezi
Michael F. Vaezi Vanderbilt University Medical Center
Laurence A. Bradley
Laurence A. Bradley University of Alabama at Birmingham
Reza Shaker
Reza Shaker Medical College of Wisconsin

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