Non-variceal Upper Gastrointestinal Bleeding Research Articles

Clinical characteristics of acute non-varicose upper gastrointestinal bleeding and the effect of endoscopic hemostasis.

Acute non-variceal upper gastrointestinal bleeding (ANVUGIB) constitutes a prevalent emergency within Gastroenterology, encompassing 80%-90% of all gastrointestinal hemorrhage incidents. This condition is distinguished by its abrupt onset, swift progression, and notably elevated mortality rate. To gather clinical data from patients with ANVUGIB at our hospital in order to elucidate the clinical characteristics specific to our institution and analyze the therapeutic effectiveness of endoscopic hemostasis. We retrospectively retrieved the records of 532 patients diagnosed with ANVUGIB by endoscopy at our hospital between March 2021 and March 2023, utilizing our medical record system. Data pertaining to general patient information, etiological factors, disease outcomes, and other relevant variables were meticulously collected and analyzed. Among the 532 patients diagnosed with ANVUGIB, the male-to-female ratio was 2.91:1, with a higher prevalence among males. Notably, 43.6% of patients presented with black stool as their primary complaint, while 27.4% had hematemesis as their initial symptom. Upon admission, 17% of patients exhibited both hematemesis and black stool, while most ANVUGIB patients primarily complained of overt gastrointestinal bleeding. Urgent routine blood examinations at admission revealed that 75.8% of patients had anemia, with 63.4% experiencing moderate to severe anemia, and 1.5% having extremely severe anemia (hemoglobin < 30 g/L). With regard to etiology, 53.2% of patients experienced bleeding without a definitive trigger, 24.2% had a history of using gastric mucosa-irritating medications, 24.2% developed bleeding after alcohol consumption, 2.8% attributed it to improper diet, 1.7% to emotional excitement, and 2.3% to fatigue preceding the bleeding episode. Drug-induced ANVUGIB was more prevalent in the elderly than middle-aged and young individuals, while bleeding due to alcohol consumption showed the opposite trend. Additionally, diet-related bleeding was more common among the young age group compared to the middle-aged group. Gastrointestinal endoscopy identified peptic ulcers as the most frequent cause of ANVUGIB (73.3%), followed by gastrointestinal malignancies (10.9%), acute gastric mucous lesions (9.8%), and androgenic upper gastrointestinal bleeding (1.5%) among inpatients with ANVUGIB. Of the 532 patients with gastrointestinal bleeding, 68 underwent endoscopic hemostasis, resulting in an endoscopic treatment rate of 12.8%, with a high immediate hemostasis success rate of 94.1%. ANVUGIB patients exhibit diverse characteristics across different age groups, and endoscopic hemostatic treatments have demonstrated remarkable efficacy.

Evaluation of the effect of parenteral nutrition on mortality and morbidity in hospitalized patients with non-variceal upper gastrointestinal bleeding

Objective: Nutritional support products should preferably be administered orally whenever possible, with rare exceptions, one of which is gastrointestinal bleeding. In our study, we examined the effects of parenteral nutrition support, which we have recently introduced in the treatment of patients with gastrointestinal bleeding, on the hospitalization duration and mortality-morbidity of these patients.&#x0D; Methods: We analyzed the patients admitted to the Internal Medicine Service with non-variceal upper gastrointestinal bleeding in our study. Patients were retrospectively analyzed in two groups, based on the years in which total parenteral nutrition (TPN) was initiated (2016-2017) and not initiated (2012-2013). Hospitalization durations and discharge methods were compared between the two groups.&#x0D; Results: Our study included a total of 369 cases after screening and application of our exclusion criteria. 35.5% of these cases received TPN, while 64.5% did not. When evaluated based on the TPN administration status after stabilizing the Rockall score of the patients, as well as considering the need for erythrocyte suspension (ES), fresh frozen plasma (FFP) replacement, and length of hospital stay, the length of hospital stay was significantly longer in those receiving TPN compared to those who did not.&#x0D; Conclusion: Although TPN may be the preferred choice in patients with upper gastrointestinal bleeding for whom oral nutrition is not suitable, our study suggests that this preference not only does not lead to a reduction in the number of blood and blood product replacements but also prolongs the hospital stay. While it is believed that complications of nutritional support with TPN may contribute to this result, our retrospective study did not provide data on this. Comprehensive prospective studies are needed on this issue.

Non-Variceal Upper Gastrointestinal Bleeding

Non-variceal upper gastrointestinal bleeding (NVUGIB), which predominantly occurs secondary to peptic ulcers, presents a major challenge in emergency departments and is associated with high mortality rates. The staged approach used for management of NVUGIB comprises preendoscopy, endoscopy, and post-endoscopy. Proton pump inhibitors and prokinetics are used for pre-endoscopy preparation to improve visualization and outcomes. Various endoscopic hemostatic methods, including injection therapy, clipping, and thermal techniques are described, which reflects the need for personalized strategies based on patient conditions and lesion characteristics. Post-endoscopic care includes continuous acid suppression therapy and selective second-look endoscopy. Overall, the approach to effective NVUGIB management is tailored to individual clinical scenarios to optimize patient outcomes.

Clinical outcomes of variceal and non-variceal upper gastrointestinal bleeding in cirrhosis patients in Singapore.

Clinical outcomes of variceal and non-variceal upper gastrointestinal bleeding in cirrhosis patients in Singapore.

Value of multidetector computed tomography angiography in severe non-variceal upper gastrointestinal bleeding: a retrospective study in a referral bleeding unit.

Non-variceal upper gastrointestinal bleeding is a common gastroenterological emergency associated with significant morbidity and mortality. Upper gastrointestinal endoscopy is currently recommended as the gold standard modality for both diagnosis and treatment. As historically played a limited role in the diagnosis of acute non-variceal upper gastrointestinal bleeding, multidetector-row computed tomography angiography is emerging as a promising tool in the diagnosis of non-variceal upper gastrointestinal bleeding, especially for severe cases. However, to date, evidence concerning the role of multidetector-row computed tomography angiography in the non-variceal upper gastrointestinal bleeding diagnosis is still lacking. The purpose of this study was to retrospectively investigate the diagnostic performance of emergent multidetector-row computed tomography angiography performed prior to any diagnostic modality or following urgent upper endoscopy to identify the status, the site, and the underlying etiology of severe non-variceal upper gastrointestinal bleeding. Institutional databases were reviewed in order to identify severe acute non-variceal upper gastrointestinal bleeding patients who were admitted to our bleeding unit and were referred for emergent multidetector-row computed tomography angiography prior to any hemostatic treatment (< 3h) or following (< 3h) endoscopy, between December 2019 and October 2022. The study aim was to evaluate the diagnostic performance of multidetector-row computed tomography angiography to detect the status, the site, and the etiology of severe non-variceal upper gastrointestinal bleeding with endoscopy, digital subtraction angiography, surgery, pathology, or a combination of them as reference standards. A total of 68 patients (38 men, median age 69years [range 25-96]) were enrolled. The overall multidetector-row computed tomography angiography sensitivity, specificity, and accuracy to diagnose bleeding status were 77.8% (95% CI: 65.5-87.3), 40% (95% CI: 5.3-85.3), and 75% (95% CI: 63.0-84.7), respectively. Finally, the overall multidetector-row computed tomography angiography sensitivity to identify the bleeding site and the bleeding etiology were 92.4% (95% CI: 83.2-97.5) and 79% (95% CI: 66.8-88.3), respectively. Although esophagogastroduodenoscopy is the mainstay in the diagnosis and treatment of most non-variceal upper gastrointestinal bleeding cases, multidetector-row computed tomography angiography seems to be a feasible and effective modality in detecting the site, the status, and the etiology of severe acute non-variceal upper gastrointestinal bleeding. It may play a crucial role in the management of selected cases of non-variceal upper gastrointestinal bleeding, especially those clinically severe and/or secondary to rare and extraordinary rare sources, effectively guiding timing and type of treatment. However, further large prospective studies are needed to clarify the role of multidetector-row computed tomography angiography in the diagnostic process of acute non-variceal upper gastrointestinal bleeding.

Nonvariceal upper gastrointestinal bleeding in COVID-19 patients: insights from the National Inpatient Sample

Background This retrospective study, conducted using the U.S. National Inpatient Sample (NIS), examines the outcomes and management of nonvariceal upper gastrointestinal bleeding (NVUGIB) in COVID-19 patients and identifies predictive factors to enhance patient prognosis. Methods We analyzed the 2020 U.S. NIS data involving adult patients (≥18 years) admitted with NVUGIB and categorized them based on the presence of COVID-19. Primary and secondary outcomes, NVUGIB-related procedures, and predictive factors were evaluated. Results Of 184,885 adult patients admitted with NVUGIB, 1.6% (2990) had COVID-19. Patients with NVUGIB and COVID-19 showed higher inpatient mortality, acute kidney injury, need for intensive care, and resource utilization metrics. Notably, there was a lower rate of early esophagogastroduodenoscopy (EGD). Multivariate logistic regression revealed conditions like peptic ulcer disease, mechanical ventilation, and alcohol abuse as significant positive predictors for NVUGIB in COVID-19 patients, whereas female gender and smoking were negative predictors. Conclusion Our findings suggest that COVID-19 significantly increases the risk of mortality and complications in NVUGIB patients. The observed decrease in early EGD interventions, potentially contributing to higher mortality rates, calls for a review of treatment strategies. Further multicenter, prospective studies are needed to validate these results and improve patient care strategies.

Protocolo diagnóstico y terapéutico de la hemorragia digestiva alta no varicosa

Non-variceal upper gastrointestinal bleeding is a highly prevalent disease in our setting. In recent years, there have been advances in its management and treatment that have reduced mortality and the rebleeding rate. The most frequent cause continues to be gastroduodenal ulcer disease. Hemodynamic stabilization of the patient, endoscopic management, and proton pump inhibitors are the cornerstone of treatment.

Gastric antral vascular ectasia, also known as watermelon stomach - diagnosis and treatment

Gastric antral vascular ectasia (GAVE), also referred to as watermelon stomach is a rare disease accounting for about 4% of non-variceal upper gastrointestinal bleeding. It can manifest as occult bleeding requiring transfusion or acute gastrointestinal bleeding. This condition often coexists with liver cirrhosis, autoimmune diseases, heart failure, in patients post-bone marrow transplantation, or kidney failure. It is crucial to differentiate GAVE from portal hypertensive gastropathy (PHG), because despite a similar clinical presentation, the treatment for these conditions is different.&#x0D; Endoscopic diagnosis is necessary and in some cases, it may require further investigation and histopathological examination of the biopsy. Treatment is administered to patients with bleeding symptoms. Currently, the most commonly used treatment method is endoscopic thermal ablation using argon plasma coagulation.&#x0D; The focus of this work is to present essential information regarding the clinical picture, diagnosis and treatment of watermelon stomach.

The Role of Endoscopy-Independent Gastrointestinal Bleeding Scores in Predicting 30-day Mortality in Aged Over 65

Introduction: The aim of this study was to assess the power of clinical findings and scoring systems to predict mortality in patients over 65 years of age with non-variceal upper gastrointestinal bleeding. Materials and Method: Data on demographic profiles and risk estimation scores were retrospectively extracted from electronic hospital medical records and other electronic databases using a standard data extraction form. The AIMS65, pre-Rockall, modified Glasgow-Blatchford, T, and Baylor bleeding scores were calculated to estimate the 30-day mortality risk. The inclusion criteria were patients aged 65 and over who presented with active bleeding symptoms and had been diagnosed with acute upper gastrointestinal bleeding by the gastroenterology department. Results: The mean age was 75.23 years, and 23.6% of the patients died within 30 days. The 30-day mortality was associated with albumin levels, malignancy, and intensive care unit hospitalization. An inverse relationship was found between the albumin level and mortality, whereas the presence of cancer and the need for intensive care were associated with 2.8-fold and 2.2-fold increases in the risk of death, respectively. The AIMS65 score (AUC: 0.794) had the highest discriminative ability to predict 30-day mortality among all risk scores. Conclusion: Albumin levels, malignancy presence, and ICU admission were indicators of mortality risk in elderly patients with upper gastrointestinal bleeding. Calculating all the scores, excluding the Baylor Bleeding score, is beneficial for assessing the risk of mortality associated with upper gastrointestinal bleeding. The AIMS65 score demonstrates the highest discriminative ability. However, using these risk-scoring systems necessitates additional data. Keywords: Gastrointestinal Hemorrhage; Mortality; Aged.

Acute Nonvariceal Upper Gastrointestinal Bleeding in Patients Using Anticoagulants: Does the Timing of Endoscopy Affect Outcomes?

In patients with acute nonvariceal upper gastrointestinal bleeding (NVUGIB), early (≤ 24h) endoscopy is recommended following hemodynamic resuscitation. Nevertheless, scarce data exist on the optimal timing of endoscopy in patients with NVUGIB receiving anticoagulants. To analyze how the timing of endoscopy may influence outcomes in anticoagulants users admitted with NVUGIB. Retrospective cohort study which consecutively included all adult patients using anticoagulants presenting with NVUGIB between January 2011 and June 2020. Time from presentation to endoscopy was assessed and defined as early (≤ 24h) and delayed (> 24h). The outcomes considered were endoscopic or surgical treatment, length of hospital stay, intermediate/intensive care unit admission, recurrent bleeding, and 30-day mortality. From 636 patients presenting with NVUGIB, 138 (21.7%) were taking anticoagulants. Vitamin K antagonists were the most frequent anticoagulants used (63.8%, n = 88). After adjusting for confounders, patients who underwent early endoscopy (59.4%, n = 82) received endoscopic therapy more frequently (OR 2.4; 95% CI 1.1-5.4; P = 0.034), had shorter length of hospital stay [7 (IQR 6) vs 9 (IQR 7) days, P = 0.042] and higher rate of intermediate/intensive care unit admission (OR 2.7; 95% CI 1.3 - 5.9; P = 0.010) than patients having delayed endoscopy. Surgical treatment, recurrent bleeding, and 30-day mortality did not differ significantly between groups. Early endoscopy (≤ 24h) in anticoagulant users admitted with acute nonvariceal upper gastrointestinal bleeding is associated with higher rate of endoscopic treatment, shorter hospital stay, and higher intermediate/intensive care unit admission. The timing of endoscopy did not influence the need for surgical intervention, recurrent bleeding, and 30-day mortality.

Retracted: A Cohort Study to Compare Effects between Ulcer- and Nonulcer-Related Nonvariceal Upper Gastrointestinal Bleeding

Retracted: A Cohort Study to Compare Effects between Ulcer- and Nonulcer-Related Nonvariceal Upper Gastrointestinal Bleeding

The value of endoscopically-placed metal clips for transcatheter arterial embolization in the treatment of recurrent acute non-variceal upper gastrointestinal bleeding

ObjectiveAcute nonvariceal upper gastrointestinal bleeding (ANVUGIB) is a common clinical emergency. Transcatheter arterial embolization (TAE) is usually used to locate the bleeding site and provide interventional embolization. During TAE, there is a low positive rate of angiography, and localization of the culprit vessel is difficult. The purpose of this study was to demonstrate the role of preplaced metal clips in TAE for ANVUGIB patients.Materials and methodsPatients with ANVUGIB in whom bleeding sites were identified endoscopically and treated with TAE from January 1st, 2005 to July 1st, 2021 were retrospectively included. According to the presence or absence of preplaced metal clips, they were divided into two groups. The main outcome measurements included the clinical success rate and rebleeding rate. Secondary outcome measurements included the mortality rate and the need for surgery. Predictors of the clinical success rate were assessed with univariate analysis and multivariate analysis.ResultsA total of 102 patients were included in this study, and all of them had undergone arterial embolization. There were 73 cases in the group with metal clips and 29 cases in the group without metal clips with consistent baseline information. The group with metal clips had a higher clinical success rate (82.2% vs. 45.0%, P < 0.001), lower rebleeding rate (8.2% vs 27.6%, P = 0.039) and additional surgery rate (11.0% vs 20.7%, P < 0.001) than the group without metal clips. In univariate analysis, ROCKALL score and preplaced metal clip marking were shown to affect clinical success rate. In multivariate analysis, metal clip marking was found to facilitate clinical success (OR = 3.750, 95CI = 1.456–9.659, P = 0.004).ConclusionIn ANVUGIB patients, preplaced metal clips could improve the clinical success rate of TAE and reduce the mortality rate and the risk of rebleeding.

Evaluation of the impact of hemotransfusion on hospitalization length and complications in patients with non-variceal upper gastrointestinal bleeding

Background: Upper gastrointestinal bleeding (UGB) is a common emergency associated with high morbidity and mortality. It can be caused by various factors, including peptic ulcers and vascular lesions. The decision to perform blood transfusion in stable UGB patients is still controversial, with more restrictive strategies showing better outcomes. Methods: A retrospective cohort study reviewed 1433 medical records of non-variceal UGB patients in a Brazilian tertiary care setting. Patients were divided into groups based on whether they received blood transfusion or not. Patient characteristics, laboratory values, procedures, and outcomes were analyzed. Logistic and linear regression models were used to assess the association of blood transfusion with complications and hospital stay. Results: Blood transfusion was associated with increased hospitalization length (p&lt;0.001), higher rebleeding rates (p&lt;0.001), and greater clinical severity. However, no association with worse renal outcomes was observed (p=0.203). Adjusting for clinical severity (Glasgow-Blatchford score) reduced the significance of the association with hospitalization length. Conclusion: Blood transfusion in stable UGB patients may serve as a marker of severity, associated with longer hospital stay and increased rebleeding rates. It does not appear to have a direct causal relationship with worse renal outcomes. The study suggests that clinical severity may play a pivotal role in outcomes, as indicated by the association with Glasgow-Blatchford score.

Recurrent Non-Variceal Upper Gastrointestinal Bleeding among Patients Receiving Dual Antiplatelet Therapy.

Patients undergoing dual antiplatelet therapy (DAPT) may experience recurrent gastrointestinal bleeding (GIB). We investigated the clinical characteristics and risk factors for recurrent non-variceal upper gastrointestinal bleeding (NVUGIB) in patients who had experienced NVUGIB while receiving DAPT. We enrolled patients diagnosed with NVUGIB while receiving DAPT between 2006 and 2020. Definite bleeding was confirmed by esophagogastroduodenoscopy in all NVUGIB patients. A total of 124 patients were diagnosed with NVUGIB while receiving DAPT. They were predominantly male (n = 103, 83.1%), bleeding mostly from the stomach (n = 94, 75.8%) and had peptic ulcers (n = 72, 58.1%). After the successful hemostasis of NVUGIB, 36 patients (29.0%) experienced at least one episode of recurrent upper GIB, 19 patients (15.3%) died, and 7 (5.6%) patients had a bleeding-related death. Multivariate analysis showed that age was a significant factor for re-bleeding (odds ratio [OR], 1.050; 95% confidence interval [CI]: 1.001-1.102; p-value: 0.047), all-cause mortality (OR, 1.096; 95% CI: 1.020-1.178, p = 0.013), and re-bleeding-related mortality (OR, 1.187; 95% CI: 1.032-1.364, p-value: 0.016). In Kaplan-Meier analysis, the cumulative probabilities of re-bleeding, death, and bleeding-related death were significantly higher in patients aged 70 and older (p = 0.008, <0.001, and 0.009, respectively). Clinicians should be cautious about re-bleeding and mortality in elderly patients who experience NVUGIB while receiving DAPT.

The Importance of Arterial Blood Flow Detection for Risk Stratification and Eradication to Achieve Definitive Hemostasis of Severe Non-Variceal UGI Hemorrhage.

Non-variceal upper gastrointestinal bleeding (NVUGIB) is a common medical problem worldwide. Independent endoscopic risk factors for rebleeding and mortality of NVUGIB that are treatable are stigmata of recent hemorrhage (SRH) and arterial blood flow underneath SRH. The specific aims of this paper are to describe the importance of arterial blood flow detection for risk stratification and as a guide to definitive hemostasis of severe NVUGIB. This is a review of randomized controlled trials and prospective cohort study methodologies and results which utilized a Doppler endoscopic probe (DEP) for the detection of arterial blood underneath SRH, for risk stratification, and as a guide to definitive hemostasis. The results are compared to visually guided hemostasis based upon SRH. Although SRH have been utilized to guide endoscopic hemostasis of NVUGIB for 50 years, when most visually guided treatments are applied to lesions with major SRH, arterial blood flow underneath SRH is not obliterated in 25-30% of patients and results in rebleeding. Definitive hemostasis, significantly lower rebleeding rates, and improvements in other clinical outcomes resulted when DEP was used for risk stratification and as a guide to obliteration of arterial blood flow underneath SRH. DEP-guided endoscopic hemostasis is a very effective and safe new method to improve patient outcomes for NVUGIB.

Efficacy of Over-the-Scope Clips Compared to Standard Therapy for Nonvariceal Upper Gastrointestinal Bleeding—A Systematic Review and Meta-analysis of Randomized Trials

Abstract Background The current standard of treatment for nonvariceal upper gastrointestinal bleeding (NVUGIB) includes endoscopic hemostasis with either through-the-scope clips or thermal therapy. However, they may be associated with rebleeding, especially in high-risk ulcers. Over-the-scope clips (OTSC) have been demonstrated in multiple recent studies to be an effective measure for NVUGIB. We aimed to analyze the current literature on standard therapy with OTSC to manage NVUGIB. Methods A meta-analysis was performed by pooling the data from randomized studies obtained from a comprehensive search of Medline, Embase, and Scopus from inception to February 2023. The outcomes analyzed included rates of persistent bleeding, rebleeding, mortality, and duration of hospitalization. Results A total of five studies were included in the final analysis. There was no significant difference in the risk of persistent bleeding between the groups, with a risk ratio (RR) of 0.29 (95% confidence interval [CI]: 0.07–1.27). The use of OTSC was associated with a significantly lower risk of 7-day and 30-day rebleeding compared with standard therapy with RR of 0.30 (95% CI: 0.16–0.59) and 0.42 (95% CI: 0.24–0.72), respectively. There was no difference in the risk of 30-day mortality or the duration of hospitalization. There was no change in the effect on subgroup analysis of studies using OTSC as first-line therapy. Conclusion The use of OTSC can reduce the rebleeding rates after endoscopic hemostasis. However, they may not reduce the risk of persistent bleeding or mortality. Future studies are required on the cost-efficacy of this modality.

The Impact of Patient's Primary Language on Inpatient Gastrointestinal Bleeding Outcomes.

The impact of English proficiency on gastrointestinal bleeding (GIB) outcomes remains unclear. In this analysis, we compare inpatient GIB outcomes between patients with English as their primary language (EPL) and those with a primary language other than English (PLOE). Using the 2019 State Inpatient Datasets for New Jersey, Maryland, and Michigan states, we created an analysis cohort of GIB hospitalizations using ICD-10 codes. Patients were stratified by primary language (EPL vs. PLOE) and type of bleeding [variceal upper GI bleeding (VUGIB), nonvariceal (NVUGIB) and lower GI bleeding (LGIB)]. Regression analyses were used to compare mortality, 30-day readmissions, and length of stay. Adjusted odds ratios (aOR) and 95% confidence intervals (CI) were reported. P<0.05 was considered statistically significant. In the cohort, 5.5-10% spoke a primary language other than English. Endoscopy utilization was lower among patients with PLOE vs. EPL for NVUGIB (17.2% vs. 21.2%, p< 0.001) and LGIB (26.3% vs. 29.2%, p= 0.027). Patients with PLOE had higher odds of dying for VUGIB (aOR 1.45, 95% CI 1.16-2.48) and LGIB (aOR 1.71, 95% CI 1.22-2.12). Patients with PLOE were also more likely to be readmitted after NVUGIB (aOR 1.75, 95% CI 1.64-1.81). However, after controlling for the percentage of PLOE patients discharged from each hospital, the disparities in mortality and readmissions were no longer detected. Disparities exist in GIB outcomes among patients with PLOE but these gaps narrow at hospitals with higher percentages of PLOE patients. Cultural and linguistic competence may improve outcomes in this vulnerable group.

S773 Impact of Inter-Hospital Transfer Status on Outcomes of Variceal and Non-Variceal Upper Gastrointestinal Bleeding: Analysis From National Inpatient Sample

S773 Impact of Inter-Hospital Transfer Status on Outcomes of Variceal and Non-Variceal Upper Gastrointestinal Bleeding: Analysis From National Inpatient Sample

S759 Efficacy of Over-the-Scope Clips Compared to Standard Therapy for Nonvariceal Upper Gastrointestinal Bleeding - A Systematic Review and Meta-Analysis of Randomized Trials

S759 Efficacy of Over-the-Scope Clips Compared to Standard Therapy for Nonvariceal Upper Gastrointestinal Bleeding - A Systematic Review and Meta-Analysis of Randomized Trials

S814 The Clot Thickens - Hemostatic Powder as Primary Therapy in Non-variceal Upper Gastrointestinal Bleeding: An Updated Systematic Review and Meta-Analysis of Randomized Clinical Trials

S814 The Clot Thickens - Hemostatic Powder as Primary Therapy in Non-variceal Upper Gastrointestinal Bleeding: An Updated Systematic Review and Meta-Analysis of Randomized Clinical Trials