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Related Concept Videos

Pulmonary Embolism I: Introduction01:29

Pulmonary Embolism I: Introduction

1.5K
Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

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Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
57
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

74
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
74
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

57
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...
57
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

35
A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
35
Pulmonary Embolism I: Introduction01:19

Pulmonary Embolism I: Introduction

65
A blood clot, or thrombus, is a semi-solid mass composed of fibrin, platelets, and red blood cells. When it forms within a vessel, it can obstruct blood flow, known as thrombosis. If part of the clot detaches, it becomes an embolus that can travel and block distant vessels. When this occurs in the pulmonary arteries, it causes a condition known as pulmonary embolism (PE).Origin and ImpactMost often, the embolus originates from a thrombus in the deep veins of the lower limbs, a condition called...
65

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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[Post-traumatic stroke due to fat embolism].

Marion Paquay1,2, Pierre Goffin3, Michelle Yerna4

  • 1Service d'Imagerie médicale, CHC MontLégia, Liège, Belgique.

Revue Medicale De Liege
|August 12, 2024
PubMed
Summary

Fat embolism syndrome, often following bone fractures, presents with diverse symptoms affecting the lungs, brain, and skin. Diagnosis is challenging, requiring exclusion of other conditions, with treatment focusing on the cause and supportive care.

Keywords:
Fat embolism syndromeStrokeTraumaTreatmentdiagnosisetiology

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Area of Science:

  • Orthopedics
  • Trauma Surgery
  • Critical Care Medicine

Background:

  • Fat embolism syndrome (FES) is a rare but serious complication predominantly seen after fractures of long bones or the pelvis.
  • Non-traumatic etiologies of FES are less common, and incidence correlates with fracture severity.
  • The underlying pathophysiology of FES is not fully elucidated, with mechanical and biochemical theories proposed.

Observation:

  • The complete manifestation of FES involves a triad of pulmonary compromise, neurological deficits, and a characteristic petechial rash.
  • Clinical presentation is highly variable, making FES a diagnosis of exclusion.
  • Diagnostic challenges arise from the polymorphic nature of signs and symptoms.

Findings:

  • FES pathophysiology involves complex interactions, potentially mechanical obstruction or biochemical reactions from fat globules.
  • The syndrome's severity dictates the extent of organ involvement, primarily affecting the lungs and central nervous system.
  • Early recognition and exclusion of other differential diagnoses are critical for timely management.

Implications:

  • Understanding FES pathophysiology is crucial for developing targeted therapies.
  • Improved diagnostic criteria and early detection strategies are needed to reduce morbidity and mortality.
  • Multidisciplinary management, combining etiological treatment with conservative measures, is essential for patient outcomes.