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Related Concept Videos

Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
Blood Pressure Imbalances and Circulatory Shock01:24

Blood Pressure Imbalances and Circulatory Shock

Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Introduction to Hemostasis01:05

Introduction to Hemostasis

Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
Vascular Spasm01:16

Vascular Spasm

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Acute Inflammation III: Local and Systemic Effects01:25

Acute Inflammation III: Local and Systemic Effects

Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...

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Related Experiment Video

Updated: Jul 6, 2026

Developing a Clinically Relevant Hemorrhagic Shock Model in Rats
08:14

Developing a Clinically Relevant Hemorrhagic Shock Model in Rats

Published on: March 22, 2024

[Hemorrheological changes in irreversible hemorrhagic shock].

Lian Zhao1, Bo Wang, Guo-xing You

  • 1Institute of Transfusion Medicine, Academy of Military Medical Science, Beijing 100850, China.

Zhongguo Wei Zhong Bing Ji Jiu Yi Xue = Chinese Critical Care Medicine = Zhongguo Weizhongbing Jijiuyixue
|March 11, 2008
PubMed
Summary

Early hemorrhagic shock in rodents shows increased blood lactate followed by a decrease, indicating metabolic shifts. Hemorheology, including blood viscosity and red blood cell (RBC) deformability, significantly decreases and does not recover, necessitating early intervention.

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Standardized Hemorrhagic Shock Induction Guided by Cerebral Oximetry and Extended Hemodynamic Monitoring in Pigs
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Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock
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Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Published on: June 6, 2011

Related Experiment Videos

Last Updated: Jul 6, 2026

Developing a Clinically Relevant Hemorrhagic Shock Model in Rats
08:14

Developing a Clinically Relevant Hemorrhagic Shock Model in Rats

Published on: March 22, 2024

Standardized Hemorrhagic Shock Induction Guided by Cerebral Oximetry and Extended Hemodynamic Monitoring in Pigs
07:51

Standardized Hemorrhagic Shock Induction Guided by Cerebral Oximetry and Extended Hemodynamic Monitoring in Pigs

Published on: May 21, 2019

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock
16:31

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Published on: June 6, 2011

Area of Science:

  • Physiology
  • Pathophysiology
  • Biomedical Engineering

Context:

  • Hemorrhagic shock is a critical condition with significant mortality.
  • Understanding early hemorheological changes is crucial for timely intervention.
  • Rodent models provide a platform for studying shock pathophysiology.

Purpose:

  • To characterize hemorheological alterations during the early phase of irreversible hemorrhagic shock.
  • To investigate changes in blood lactate, viscosity, red blood cell (RBC) deformability, and aggregation.
  • To establish a baseline for potential therapeutic strategies.

Summary:

  • In a rodent model, irreversible hemorrhagic shock induced significant increases in blood lactate, followed by a decrease.
  • Blood viscosity, plasma viscosity, RBC deformability, and RBC aggregation index all decreased significantly post-shock.
  • These hemorheological parameters showed no improvement, suggesting persistent impairment.

Impact:

  • The findings highlight distinct hemorheological changes in early hemorrhagic shock compared to later stages.
  • Early detection and correction of hemorheological disorders are critical for improving outcomes.
  • This research provides insights for developing targeted treatments for hemorrhagic shock.