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Related Concept Videos

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
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Varicose veins, or varicosities, develop when the valves in the veins, which control blood flow, weaken or damage. It causes blood to pool and the veins to enlarge. Understanding the clinical manifestations, diagnostic approaches, and management options for varicose veins is crucial for effective treatment and relief.Clinical manifestationsClinical manifestations of varicose veins include a heavy, achy feeling or pain after prolonged standing or sitting. This discomfort can often be relieved by...
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Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
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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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A Patient-Derived Xenograft Model for Venous Malformation
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Developmental venous anomalies: current concepts and implications for management.

Stylianos K Rammos1, Raffella Maina, Giuseppe Lanzino

  • 1Department of Neurosurgery, Illinois Neurological Institute, University of Illinois at Peoria, Peoria, Illinois, USA.

Neurosurgery
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Summary

Developmental venous anomalies (DVAs) are common congenital brain vascular malformations. Recent studies show isolated DVAs rarely cause major complications, with hemorrhage often linked to coexistent conditions.

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Area of Science:

  • Neurology
  • Vascular Malformations
  • Neuroimaging

Background:

  • Developmental venous anomalies (DVAs), previously venous angiomas, are the most frequent intracranial vascular malformations.
  • DVAs are congenital anomalies characterized by mature venous walls without arterial or capillary components.
  • They exhibit a characteristic 'caput medusae' appearance on MRI and angiography.

Purpose of the Study:

  • To re-evaluate the clinical significance and associated risks of DVAs.
  • To investigate the relationship between DVAs and other cerebrovascular malformations.
  • To clarify the pathogenesis of mixed vascular malformations involving DVAs.

Main Methods:

  • Review of recent cohort studies on DVAs.
  • Analysis of neuroimaging findings, including MRI and angiography.
  • Correlation of DVA presentation with neurological complications and coexistent lesions.

Main Results:

  • Incidental and asymptomatic DVAs are frequently identified with advanced neuroimaging.
  • Isolated DVAs are less frequently associated with major neurological complications than previously thought.
  • Intracerebral hemorrhage is often linked to coexistent cavernous malformations, not isolated DVAs.
  • DVA thrombosis can still cause infarction or hemorrhage.
  • DVAs frequently coexist with cavernous and arteriovenous malformations, suggesting shared pathogenetic pathways.

Conclusions:

  • DVAs are common, often asymptomatic, intracranial vascular malformations.
  • The risk of major complications from isolated DVAs is lower than previously believed.
  • DVAs play a significant role in the pathogenesis of mixed vascular malformations.