Alveolar Capillary Membrane
Alveolar Capillary Membrane - Related Videos
07:45
Modeling Dysplastic and Functional Lung Alveolar Repair after Influenza Infection
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2025
This protocol provides instructions for intranasal administration of IAV and downstream analysis of mouse lung damage and associated transcriptional changes to lung cell types.
14:53
Capillary Electrophoresis Separation of Monoclonal Antibody Isoforms Using a Neutral Capillary
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Cited by 2 •
2017
Here, we present a comprehensive capillary zone electrophoresis protocol for the assessment of intrinsic physicochemical heterogeneity of monoclonal antibodies as a quality attribute.
03:45
Purifying Capillaries From a Porcine Brain
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2025
This video demonstrates the isolation of capillaries from fresh porcine brains. The process involves removing the meninges, isolating the grey matter from the brain tissue, homogenizing and filtering the grey matter to isolate the capillaries, and finally using enzymatic digestion to purify the capillaries further.
08:50
Capillary Electrophoresis (CE)
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
11:26
Harvesting Murine Alveolar Macrophages and Evaluating Cellular Activation Induced by Polyanhydride Nanoparticles
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Cited by 16 •
2012
Herein, we describe protocols for harvesting murine alveolar macrophages, which are resident innate immune cells in the lung, and examining their activation in response to co-culture with polyanhydride nanoparticles.
FAQs
Oxygen and carbon dioxide move by diffusion because each gas follows its partial-pressure gradient across the blood-gas barrier. Oxygen travels from alveolar air toward pulmonary capillary blood, while carbon dioxide moves in the opposite direction. Efficient exchange therefore depends on maintaining a short diffusion distance and preserving the membrane’s structural integrity.
An increased diffusion distance makes gas transfer less efficient, so changes that thicken the alveolar capillary membrane can limit oxygen uptake and carbon dioxide removal. Pulmonary edema, inflammation, and fibrosis are clinically important because they alter the barrier’s dimensions or structure, potentially contributing to impaired diffusion and hypoxemia.
These closely apposed layers form the pathway that gases must cross between alveolar air and capillary blood. Their arrangement keeps the diffusion distance minimal while maintaining separation between the two compartments. Damage or structural alteration in any part can compromise membrane integrity and reduce the efficiency of pulmonary gas exchange.
Each condition can interfere with diffusion by changing the membrane’s thickness or integrity. Pulmonary edema may increase the distance gases must cross, whereas inflammation or fibrosis can disrupt the normal structure of the barrier. The resulting reduction in gas transfer may contribute to hypoxemia and respiratory dysfunction, especially when the membrane is substantially altered.
Because oxygen must diffuse across this membrane before entering pulmonary capillary blood, abnormalities in its thickness, surface area, or integrity can help explain reduced oxygenation. Clinicians therefore consider the membrane when understanding hypoxemia and respiratory failure, particularly in lung disease associated with edema, inflammation, fibrosis, or other structural changes.
The membrane links structural lung changes with the physiological problem of impaired gas exchange. Recognizing how disease alters diffusion helps clinicians interpret hypoxemia as a possible consequence of a compromised blood-gas barrier. This framework supports the broader clinical evaluation of respiratory failure and informs consideration of diagnosis and treatment in affected patients.