Gastrointestinal Hemorrhage
Gastrointestinal Hemorrhage - Related Videos
08:15
Gastrointestinal Motility Monitor (GIMM)
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Cited by 36 •
2010
Evaluation of colonic motility in the guinea pig distal colon with the Gastrointestinal Motility Monitor (GIMM) is a straightforward and simple to learn approach to quantitatively evaluate propulsive motility in the gastrointestinal tract.
02:29
Modeling Drug-Induced Hemorrhage in Zebrafish Larva
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2025
In this video, fertilized zebrafish embryos are dechorionated under a stereo microscope and then exposed to a cholesterol synthesis inhibitor, leading to the development of blood vessel ruptures and brain hemorrhages in the larvae. Hemorrhagic larvae, identifiable by distinct red spots, are subsequently separated under a microscope for further analysis.
07:57
Integrated Compensatory Responses in a Human Model of Hemorrhage
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Cited by 11 •
2016
The purpose of this protocol is to demonstrate the techniques for measuring compensatory responses to reduced central blood volume using lower body negative pressure as a noninvasive experimental model of human hemorrhage which can be used to quantify the total integration of compensatory mechanisms to blood volume deficit in humans.
06:02
Isolation of CD 90+ Fibroblast/Myofibroblasts from Human Frozen Gastrointestinal Specimens
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Cited by 17 •
2016
Here, a protocol to isolate and establish primary fibroblast/myofibroblast (MF) cultures from frozen gastric, small intestinal, and colonic tissue-yielding cells with a MF phenotype-is presented. These cells express CD90, α-SMA and vimentin. MFs can be used for a variety of functional assays including enzymatic activity and cytokine production.
16:31
Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock
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Cited by 24 •
2011
The Hemorrhagic Shock model has been a reliable and reproducible resource facilitating the identification and understanding of signaling cascades associated with inflammation and end-organ damage after trauma. This article provides a step-by-step description of surgical and mechanical aspects associated with the Hemorrhagic Shock experimental procedure in mice.
FAQs
The rate and volume of blood loss are central determinants of severity. A slowly developing loss may remain occult and become evident mainly through testing, whereas rapid or substantial bleeding can produce visible blood loss and threaten circulation. Clinicians therefore interpret the bleeding pattern together with vital signs and other findings to identify patients who may require urgent stabilization and source control.
Several types of structural injury can open gastrointestinal blood vessels. Mucosal injury and ulceration directly damage the tissue surface, while inflammation can weaken or disrupt affected areas. Vascular abnormalities provide another possible source, and portal-hypertension-related veins can bleed when elevated pressure affects these vessels. Identifying the likely mechanism helps clinicians focus subsequent evaluation and hemostatic treatment.
The visible pattern of bleeding provides an important clinical clue about how blood is presenting from the digestive tract. Hematemesis, melena, and hematochezia represent different overt manifestations, while occult loss may be detectable only by testing. These distinctions help organize the history and guide decisions about laboratory assessment, endoscopic evaluation, and the urgency of clinical management.
Initial evaluation combines the patient’s vital signs, bleeding history, and laboratory testing to assess the clinical situation and support source identification. The history helps characterize the observed bleeding, while vital signs and laboratory results contribute information about the effects of blood loss. Endoscopy is often added when direct localization is needed and when treatment may be guided by the findings.
Endoscopy can help locate the bleeding source within the digestive tract and provide findings that direct hemostasis, meaning measures intended to control bleeding. Its value extends beyond visual identification because the result can connect the suspected cause with a targeted intervention. In clinical care, this makes endoscopy an important part of evaluating persistent, overt, or otherwise significant hemorrhage.
Fluid or blood-product resuscitation supports circulation while clinicians investigate and control the bleeding source. This supportive treatment addresses the physiological consequences of blood loss rather than removing the underlying lesion or vascular cause. Used alongside prompt recognition, diagnostic assessment, and hemostasis, resuscitation helps reduce the risk that ongoing hemorrhage will progress to shock and worsen clinical outcomes.