Related Experiment Video
Updated: Aug 6, 2026
06:22
Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)
Published on: April 7, 2021
[Alveolar hemorrhage]
C M Kronauer1, G Keusch, H R Burger
1Medizinische Klinik, Universitätsspital Zürich.
Schweizerische Medizinische Wochenschrift
|October 21, 1989
Summary
Alveolar hemorrhage (AH) is often misdiagnosed. Early diagnosis and treatment, often involving immunosuppressants, are crucial for survival, especially when AH is linked to kidney disease or connective tissue disorders.
Area of Science:
- Pulmonary Medicine
- Nephrology
- Immunology
Context:
- Alveolar hemorrhage (AH) presents with hemoptysis, dyspnea, and anemia, often mimicking pneumonia or pulmonary edema.
- AH can be isolated or associated with systemic diseases like connective tissue diseases or rapidly progressive glomerulonephritis.
- A retrospective study at the University Hospital of Zurich analyzed 18 AH cases from 1978-1988.
Purpose:
- To review the clinical presentation, associated conditions, and outcomes of alveolar hemorrhage.
- To highlight the diagnostic challenges and the importance of identifying underlying systemic disorders.
- To emphasize the role of immunosuppressive therapy in managing AH syndromes.
Summary:
- Of 18 patients, 16 had AH associated with kidney disease (vasculitis, glomerulonephritis, Goodpasture's syndrome), and 2 had isolated AH.
- Presenting symptoms varied, with 5 patients initially showing AH, 9 with renal symptoms, and 2 with simultaneous pulmonary and renal features.
- Treatment with immunosuppressive agents was common, though 7 patients died, while isolated AH cases survived. Renal outcomes included temporary or permanent dialysis.
Impact:
- Accurate diagnosis of AH requires evaluating extrapulmonary organs and conducting immunologic studies.
- Delayed diagnosis or treatment of AH syndromes can lead to severe complications and mortality.
- Understanding the link between pulmonary and renal manifestations is key to managing complex AH cases effectively.
Related Concept Videos
01:26Alveoli and Alveolar Ducts
The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...
01:30Epistaxis
Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
01:21Acute 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:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
01:17Hemorrhagic 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...
01:29Hemorrhagic 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...
01:10Atelectasis 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...