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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...
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...
Epistaxis01:30

Epistaxis

Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
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...
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...
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Venous Thrombosis IV: Nursing Management

Nursing management begins with a thorough assessment of the patient's health history. Key factors include trauma to veins, peripherally inserted central catheters, varicose veins, recent pregnancy or childbirth, surgery, bacteremia, prolonged bed rest, atrial fibrillation, COPD, heart failure, cancer, coagulation disorders, myocardial infarction, spinal cord injury, stroke, prolonged travel, recent bone fractures, and dehydration. Review medication intake, particularly oral contraceptives,...

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Related Experiment Video

Updated: Jun 4, 2026

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock
09:09

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock

Published on: November 3, 2023

[Volume replenishment in haemorrhage: caution advised].

Albertus J Kooter1, Sonja Zweegman, Yvo M Smulders

  • 1VU Medisch Centrum, Afd. Interne Geneeskunde, Amsterdam, The Netherlands. jkooter@vumc.nl

Nederlands Tijdschrift Voor Geneeskunde
|February 5, 2011
PubMed
Summary

In acute bleeding, aggressive intravenous fluid resuscitation can worsen blood loss. Caution is advised, as controlled hypotension may improve outcomes in hemorrhagic shock.

Area of Science:

  • Emergency Medicine
  • Critical Care Medicine
  • Physiology

Background:

  • Acute hemorrhage is a common medical emergency.
  • Hypotension and reduced organ perfusion are key signs.
  • Standard treatment involves intravenous fluid resuscitation.

Purpose of the Study:

  • To advocate for caution in intravenous volume adjustment during hemorrhage.
  • To highlight the potential negative impact of fluid resuscitation on bleeding.
  • To challenge current guidelines recommending liberal fluid administration in hypotensive patients with hemorrhage.

Main Methods:

  • Review of clinical observations.
  • Analysis of experimental animal and human studies on volume replenishment in hemorrhagic shock.

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Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock
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Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock
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Main Results:

  • Intravenous volume replenishment can increase bleeding tendency and blood loss.
  • Studies suggest that accepting hypotension may favorably affect prognosis in hemorrhagic shock.
  • Current guidelines often advise liberal fluid resuscitation for hypotension in bleeding patients.

Conclusions:

  • Physicians should exercise caution when adjusting blood volume in patients with acute hemorrhage.
  • Rethinking the approach to fluid resuscitation in hemorrhagic shock is necessary.
  • Evidence suggests a potential benefit in managing hypotension cautiously rather than aggressively replenishing fluids.