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Venous Return01:04

Venous Return

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The circulatory system plays a crucial role in ensuring the optimal functioning of the human body. One of its critical components is venous return - the process that completes the blood circulation cycle. This article will delve into the concept of venous return, how it works, and its significance to our health.
What is Venous Return?
Venous return refers to the rate at which blood flows back to the heart from the body's peripheral veins. It's an integral part of the circulatory system...
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Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

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Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
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Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

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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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Venous Thrombosis IV: Nursing Management01:30

Venous Thrombosis IV: Nursing Management

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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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Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

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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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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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Updated: Jan 31, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

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Unilateral retinal venous beading.

Ahmed Fouad Abdel-Hay1, Vasant Raman2

  • 1Royal Eye Infirmary, University hospitals of Plymouth, Plymouth, UK.

BMJ Case Reports
|December 21, 2018
PubMed
Summary

Retinal venous beading, a rare vascular disorder, can cause vision loss. This case highlights a sporadic, unilateral instance in an 18-year-old man without complications.

Area of Science:

  • Ophthalmology
  • Vascular Biology
  • Medical Genetics

Background:

  • Inherited retinal venous beading is a rare condition affecting retinal veins.
  • It can lead to severe vision-threatening complications like vitreous hemorrhage and ischemia.

Observation:

  • A case of sporadic, unilateral retinal venous beading was observed in an 18-year-old male.
  • The condition was isolated, affecting only the retinal veins without other ocular structures.
  • The patient had no concurrent ocular or systemic disorders.

Findings:

  • The patient presented with tortuosity and beading of retinal veins.
  • The malformation was unilateral and did not impact visual acuity at the time of examination.
  • No complications such as macular hard exudation or ischemia were noted.
Keywords:
eyeretina

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Implications:

  • This case expands understanding of the spectrum of retinal venous beading.
  • Highlights the importance of routine eye examinations for early detection.
  • Further research into genetic and environmental factors may be warranted.