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Related Concept Videos

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...
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:
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...
Pulmonary Embolism I: Introduction01:29

Pulmonary Embolism I: Introduction

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...
Pulmonary Edema II: Pathophysiology01:18

Pulmonary Edema II: Pathophysiology

Pulmonary edema is the accumulation of fluid in the interstitial and alveolar spaces of the lungs, impairing gas exchange and oxygen delivery. It may be cardiogenic or noncardiogenic, but both reduce oxygenation and lung compliance.Cardiogenic Pulmonary EdemaCardiogenic edema results from increased hydrostatic pressure in pulmonary capillaries, usually due to left ventricular dysfunction from myocardial infarction, heart failure, or valvular disease. Ineffective cardiac pumping causes blood to...

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Related Experiment Video

Updated: Jun 13, 2026

Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung
07:10

Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung

Published on: May 20, 2019

Diffuse alveolar hemorrhage.

Abigail R Lara1, Marvin I Schwarz

  • 1University of Colorado Health Sciences Center, Division of Pulmonary Sciences and Critical Care, 4200 E 9th Ave, Box C272, Denver, CO 80262, USA.

Chest
|May 6, 2010
PubMed
Summary
This summary is machine-generated.

Diffuse alveolar hemorrhage (DAH) is a severe respiratory condition often requiring bronchoscopy for diagnosis due to nonspecific symptoms. Prompt identification of the underlying cause is crucial for effective treatment and improved patient outcomes.

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Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
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Area of Science:

  • Pulmonology
  • Critical Care Medicine

Background:

  • Diffuse alveolar hemorrhage (DAH) presents as a critical respiratory illness leading to respiratory failure.
  • Nonspecific symptoms, absent hemoptysis in many cases, and ambiguous radiographic findings complicate DAH recognition.
  • Bronchoalveolar lavage (BAL) is often essential for diagnosing DAH.

Purpose of the Study:

  • To review the diagnostic approaches for identifying underlying causes of DAH.
  • To discuss various clinical entities associated with DAH.
  • To outline current treatment strategies for DAH.

Main Methods:

  • Review of literature on DAH diagnosis and management.
  • Analysis of clinical presentations and diagnostic modalities.
  • Synthesis of information on histopathology and etiology.

Main Results:

  • DAH diagnosis frequently relies on BAL findings.
  • Identifying the specific cause of DAH is paramount for guiding therapy.
  • A range of histologies and clinical conditions can lead to DAH.

Conclusions:

  • Accurate diagnosis of DAH and its underlying etiology is critical for timely and effective treatment.
  • This review provides a comprehensive overview of DAH diagnosis, causes, and management options.
  • Further research may refine diagnostic criteria and therapeutic interventions for DAH.