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Open research questions in Gastrointestinal Bleeding Diagnosis and Treatment

162 gap statements mined from Gastrointestinal Bleeding Diagnosis and Treatment papers in our 7.9M-paper local library, which holds 800 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The need for simple and reliable risk classification tools that can be calculated at the time of admission. The lack of a prediction model that uses APUA components and admission lactate levels to predict 30-day mortality in patients with acute upper gastrointestinal bleeding.

    Predicting 30-day mortality in upper gastrointestinal bleeding using APUA components and lactate: Development and internal validation · 2026 · DOI

  • A calculator was created to predict which patients are at risk for bleeding, but it has not been tested outside of its original studies.

    External Validation and Recalibration of a Risk Calculator for Major Bleeding After Diagnostic Kidney Biopsy · 2026 · DOI

  • A risk calculator for major bleeding associated with kidney biopsy exists but its performance has not been tested externally.

    External Validation and Recalibration of a Risk Calculator for Major Bleeding After Diagnostic Kidney Biopsy · 2026 · DOI

  • However, its prognostic significance in gastrointestinal bleeding (GIB) remains unclear.

    Creatinine-to-albumin ratio for early ICU-course (first 24 hours) risk stratification of mortality in critically ill patients with gastrointestinal bleeding: A retrospective cohort study · 2026 · DOI

  • Rectal arterial embolization (RAE) offers a viable alternative, however, detailed descriptions of its application for AHRU in literature are lacking.

    Rectal arterial embolization for hemostasis of acute hemorrhagic rectal ulcers: A case series · 2025 · DOI

  • However, because reports on EDSL are scarce, we conducted a two-center cohort study to evaluate its effectiveness.

    Clinical outcomes of endoscopic detachable snare ligation for colonic diverticular hemorrhage: Multicenter cohort study · 2024 · DOI

  • There is a need to compare the effectiveness of endoscopic therapy and medical therapy in treating upper gastrointestinal angioectasias. Prior studies have limitations, including lack of population diversity and short-term follow-up.

    Endoscopic therapy may be more effective in long-term control of upper gastrointestinal angioectasias when compared with somatostatin analogues · 2026 · DOI

  • In this setting, dynamic computed tomography angiography is essential not only to confirm the bleeding site but also to delineate the segmental vascular anatomy, offering an anatomical roadmap to decide when early transition from repeated minimally invasive attempts to segmental colectomy is warranted.

    Right Hemicolectomy for Refractory Hematochezia in Cecal Angiodysplasia After Failed Embolization: A Case Report · 2026 · DOI

  • Further studies are needed to improve the performance of the AI model, particularly at the ileocolonic junction. The development of more accurate and reliable AI models for SBCE analysis is necessary. The study's findings could inform the development of new imaging protocols and preparation methods for SBCE.

    Artificial Intelligence-Based Localization of Small Bowel Anatomical Transition Zones in Crohn’s Disease Using Capsule Endoscopy · 2026 · DOI

  • There is a need for effective pharmacological management of peptic ulcer bleeding. The current literature lacks evidence supporting the use of P-CAB in peptic ulcer bleeding treatment.

    Pharmacological Management of Peptic Ulcer Bleeding · 2026 · DOI

  • Previous studies have not clarified a universally acknowledged treatment approach for small bowel hemangiomas. There is a lack of comparison between different types of endoscopic therapies for the treatment of small bowel hemangiomas.

    Endoscopic treatment of small bowel hemangiomas via double-balloon enteroscopy: A single-center comparative study · 2026 · DOI

  • There is a need for non-invasive diagnostic tools for GI GVHD. The current diagnostic standard is invasive and may be risky for some patients. There is a lack of studies investigating the relationship between CEUS and the Lerner histopathological grade.

    Contrast-enhanced Ultrasound and the Lerner Histopathological Grade in Gastrointestinal Graft-versus-host Disease: A Prospective Single-centre Study · 2026 · DOI

  • This study has several limitations. For this cohort to histopathologically confirmed GI GVHD episodes; the study cannot estimate the diagnostic accuracy of CEUS for distinguishing GVHD from infectious, drug-related, vascular, or other post-transplant gastrointestinal complications. No prespecified sample size calculation was performed.

    Contrast-enhanced Ultrasound and the Lerner Histopathological Grade in Gastrointestinal Graft-versus-host Disease: A Prospective Single-centre Study · 2026 · DOI

  • The study identifies the need for further evaluation of AI-assisted SBCE reading. The need to report whether readers still detect clinically relevant lesions in non-flagged segments.

    Open‐Source Artificial Intelligence in Small‐Bowel Capsule Endoscopy—Visual Assistance is Promising, But Not Yet a Standard of Care · 2026 · DOI

  • Compared to other endoscopic hemostatic methods; such as epinephrine injection, hemoclips, thermal devices, or topical agents like Hemospray - ABS has a multifactorial mechanism involving erythrocyte and fibrinogen gamma aggregation, though head-to-head comparative data remain limited.

    Ankaferd blood stopper application in gastrointestinal bleeding: An updated narrative review · 2026 · DOI

  • The lack of a validated endoscopic tool for individualized risk prediction. The need for a systematic analysis of the factors contributing to recurrence.

    Endoscopic score predicting recurrence after foam sclerotherapy in grade I internal hemorrhoids: Development and external validation · 2026 · DOI

  • Accepted Manuscript diagnostic yield and feasibility of such systems in patients with HHT have not been systematically evaluated. Telangiectatic lesions have been reported throughout the gastrointestinal tract; however, their distribution and characterisation remains incompletely characterised. Consequently, the true pan-enteric distribution and burden of telangiectatic lesions in HHT remain uncertain.

    Pan-enteric video capsule endoscopy in hereditary haemorrhagic telangiectasia: gastrointestinal manifestations and feasibility · 2026 · DOI

  • Puncture-site bleeding can be difficult to control. Conventional hemostatic methods may not always be effective. The need for a simple and reproducible technique for hemostasis.

    Long-cap compression hemostasis for puncture-site bleeding after endoscopic injection sclerotherapy: from rescue therapy to routine practice · 2026 · DOI

  • The highly specialized nature of diagnostic endoscopy report writing means that errors and omissions are not uncommon. Few studies have applied large language models to gastroenterology, particularly for specific vertical tasks such as polyp detection and segmentation.

    Domain specific multimodal large language model for automated endoscopy reporting with multicenter prospective validation · 2026 · DOI

  • Manual interpretation of capsule endoscopy video footage is labor-intensive and subject to inter-observer variability.

    Deep learning-enhanced prediction of small intestinal bleeding points using long short-term memory networks · 2026 · DOI

  • The study was unable to ascertain the cause of death. The study lacked actual endoscopic data, which limited the ability to determine the endoscopic characteristics of the angioectasias. The study was unable to perform stratified analysis with octreotide and lanreotide due to the small number of patients in the cohorts.

    Endoscopic therapy may be more effective in long-term control of upper gastrointestinal angioectasias when compared with somatostatin analogues · 2026 · DOI

  • Existing models have not been specifically trained in CD patients. Automated SB segmentation may be challenging in CD patients due to terminal ileitis and delayed gastric emptying.

    Artificial Intelligence-Based Localization of Small Bowel Anatomical Transition Zones in Crohn’s Disease Using Capsule Endoscopy · 2026 · DOI

  • Further progress and developments in virtual endoscopy are expected in the future. The incorporation of CT and magnetic resonance imaging into virtual endoscopy may improve its diagnostic accuracy.

    Endoscopic treatment of small bowel hemangiomas via double-balloon enteroscopy: A single-center comparative study · 2026 · DOI

  • Second, four previous meta-analyses were limited to the comparison between APC and formalin or BEC, and focused on RFA alone, but ours included nearly all types of endoscopic treatment.

    Efficacy and Safety of Endoscopic Treatment for Chronic Hemorrhagic Radiation Enteropathy: A Systematic Review and Meta-analysis · 2026 · DOI

  • Level of evidence ACCF/ACG/AHA 2008 expert consensus document on reducing the GI risk of antiplatelet therapy and NSAID use40 The combination of ASA and anticoagulant therapy…

    Management of Peptic Ulcer Disease in Patients Taking Antithrombotic Agents · 2026 · DOI

Most-cited papers in Gastrointestinal Bleeding Diagnosis and Treatment

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Open questions raised by papers listed on this page include: (1) The lack of a prediction model that uses APUA components and admission lactate levels to predict 30-day mortality in patients with acute upper gastrointestinal bleeding (“Predicting 30-day mortality in upper gastrointestinal bleeding using APUA…”, 2026); (2) A calculator was created to predict which patients are at risk for bleeding, but it has not been tested outside of its original studies (“External Validation and Recalibration of a Risk Calculator for Major Bleeding…”, 2026); (3) Its prognostic significance in gastrointestinal bleeding (GIB) remains unclear (“Creatinine-to-albumin ratio for early ICU-course (first 24 hours) risk…”, 2026); (4) There is a need to compare the effectiveness of endoscopic therapy and medical therapy in treating upper gastrointestinal angioectasias (“Endoscopic therapy may be more effective in long-term control of upper…”, 2026); (5) Further studies are needed to improve the performance of the AI model, particularly at the ileocolonic junction (“Artificial Intelligence-Based Localization of Small Bowel Anatomical Transition…”, 2026). 162 gap statements have been mined from Gastrointestinal Bleeding Diagnosis and Treatment papers in our 7.9M-paper local library, which holds 800 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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