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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Related Experiment Video

Updated: May 26, 2026

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
07:54

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea

Published on: December 6, 2016

Coagulability in obstructive sleep apnea.

Christina Liak1, M Fitzpatrick

  • 1Division of Respirology & Critical Care Medicine, Department of Medicine, Queen's University, Kingston, Ontario, Canada.

Canadian Respiratory Journal
|December 22, 2011
PubMed
Summary
This summary is machine-generated.

Obstructive sleep apnea (OSA) is linked to a procoagulant state, increasing thrombotic event risk. Research shows OSA elevates hematocrit, viscosity, and clotting factors, while impairing fibrinolysis.

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A Model to Simulate Clinically Relevant Hypoxia in Humans
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A Model to Simulate Clinically Relevant Hypoxia in Humans
09:54

A Model to Simulate Clinically Relevant Hypoxia in Humans

Published on: December 22, 2016

Area of Science:

  • Cardiovascular Health
  • Hematology
  • Sleep Medicine

Background:

  • Obstructive sleep apnea (OSA) significantly impacts quality of life and cardiovascular health.
  • The direct link between OSA and cardiovascular morbidity/mortality is not fully understood.
  • Nocturnal hypoxia in OSA may induce a hypercoagulable state, increasing thrombotic event risk.

Purpose of the Study:

  • To comprehensively review evidence linking OSA to heightened coagulability.
  • To identify research gaps and future directions in OSA and coagulation.

Main Methods:

  • Systematic literature search using Ovid Medline and Web of Science.
  • Inclusion of peer-reviewed articles, meta-analyses, and systematic reviews from 1990 to present.
  • Cross-referencing of article citations to ensure comprehensive data retrieval.

Main Results:

  • Patients with OSA exhibit increased hematocrit, blood viscosity, and clotting factors.
  • Platelet activity and whole blood coagulability are elevated in OSA patients.
  • Fibrinolytic activity is notably impaired in individuals with OSA.

Conclusions:

  • Substantial evidence supports an association between OSA and a procoagulant state.
  • Multiple hemostatic factors contribute to the procoagulant state in OSA.
  • Further well-powered clinical studies are needed to clarify confounding variables and treatment responses.