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Updated: Jun 21, 2026
12:04
Assessment of the Cytotoxic and Immunomodulatory Effects of Substances in Human Precision-cut Lung Slices
Published on: May 9, 2018
Summary
Sudden onset pulmonary edema in humans may involve a positive feedback loop. In rabbits, increased cerebrospinal fluid pressure caused pulmonary edema, especially after prolonged cerebral ischemia.
Area of Science:
- Neuroscience
- Pulmonary Medicine
- Pathophysiology
Background:
- Clinical pulmonary edema presents as sudden and persistent, suggesting a positive feedback mechanism.
- Producing pulmonary edema in animals via hemodynamic means is challenging.
- A neurogenic component is crucial in pulmonary edema development.
Purpose of the Study:
- To investigate the neurogenic component of pulmonary edema.
- To illustrate the role of increased cerebrospinal fluid pressure in inducing pulmonary edema.
- To explore hypotheses on the pathogenesis of pulmonary edema in humans.
Main Methods:
- Acutely increasing cerebrospinal fluid pressure in rabbits to 300 mmHg (40 kPa).
- Observing respiratory response to changes in cerebrospinal fluid pressure.
- Assessing the incidence of pulmonary edema following varying durations of cerebral ischemia.
Main Results:
- Breathing ceased immediately upon increasing cerebrospinal fluid pressure and resumed upon reduction.
- Pulmonary edema was invariably induced with cerebral ischemia lasting longer than 2 minutes.
- Induced pulmonary edema was often fatal, despite apparent recovery of animals otherwise.
Conclusions:
- Elevated cerebrospinal fluid pressure can trigger a fatal neurogenic pulmonary edema.
- Cerebral ischemia duration is a critical factor in the development of pulmonary edema.
- Findings may offer insights into pulmonary edema following subarachnoid hemorrhage in humans.
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