Surfactant Depletion
Surfactant Depletion - Related Videos
07:20
Lavage-induced Surfactant Depletion in Pigs As a Model of the Acute Respiratory Distress Syndrome (ARDS)
0 Views •
Cited by 21 •
2016
Repeated pulmonary lavages in anesthetized pigs induce lung injury resembling major aspects of human acute respiratory distress syndrome (ARDS). For this purpose the lungs are repeatedly lavaged with 0.9% saline at 37 °C. The goal of the protocol is a reproducible mitigation of gas exchange and hemodynamics for research in ARDS.
06:17
Depletion of Specific Cell Populations by Complement Depletion
0 Views •
Cited by 15 •
2010
To effectively study the function of immune cell populations their purification is often required. Complement depletion is a fast and inexpensive technique for the isolation of immune cell populations with high purity.
09:34
Extraction and Characterization of Surfactants from Atmospheric Aerosols
0 Views •
Cited by 26 •
2017
Methods are presented for the targeted extraction of surfactants present in atmospheric aerosols and the determination of their absolute concentrations and surface tension curves in water, including their Critical Micelle Concentration (CMC).
06:22
Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)
0 Views •
Cited by 5 •
2021
A combination of surfactant washout using 0.9% saline (35 mL/kg body weight, 37 °C) and high tidal volume ventilation with low PEEP to cause moderate ventilator induced lung injury (VILI) results in experimental acute respiratory distress syndrome (ARDS). This method provides a model of lung injury with low/limited recruitability to study the effect of various ventilation strategies for extended periods.
08:50
Depletion and Reconstitution of Macrophages in Mice
0 Views •
Cited by 118 •
2012
Macrophages play a central role in homeostasis and pathology in many tissues. The protocol presented here describes methods for depleting macrophages in vivo, deriving polarized macrophages from bone marrow aspirates, and adoptively transferring macrophages into mice. These techniques allow determination of the role that polarized macrophages play in health and disease.
FAQs
Reduced surfactant activity allows surface tension at the alveolar air-liquid interface to rise. During exhalation, that increased tension favors alveolar collapse, so the lungs require greater effort to reopen and inflate. The resulting loss of alveolar stability helps explain reduced lung compliance and the impaired respiratory function associated with surfactant depletion.
Gas exchange depends on maintaining stable, adequately expanded alveoli, not only on keeping the conducting airways open. Surfactant depletion promotes collapse and decreases lung compliance, reducing the effective surface available for oxygen and carbon dioxide exchange. Consequently, ventilation can become less efficient even without an obstruction in the airways themselves.
Surfactant depletion is especially important in respiratory distress syndrome affecting premature infants, where insufficient or impaired surfactant contributes to respiratory difficulty. It can also occur in acute lung injury and other pulmonary disorders. These settings make surfactant status relevant to understanding alveolar instability, impaired gas exchange, and worsening respiratory function.
Identifying surfactant depletion can inform diagnosis and the selection of supportive respiratory strategies. Because the process reduces compliance and promotes alveolar collapse, ventilatory management must be considered in relation to alveolar stability and gas exchange. The same recognition also helps clinicians evaluate whether surfactant replacement strategies may be relevant to the clinical situation.
Surfactant replacement strategies aim to address the consequences of reduced or impaired pulmonary surfactant. By supporting the alveolar surface film, replacement may help preserve alveolar stability, improve the mechanical conditions needed for breathing, and support oxygen and carbon dioxide exchange. This approach is particularly relevant when surfactant depletion contributes to respiratory distress.
Research on surfactant depletion connects molecular changes at the alveolar interface with clinically important outcomes, including reduced compliance, alveolar collapse, and impaired gas exchange. It supports investigation of therapies that preserve surfactant function or stability, while also improving understanding of respiratory distress syndrome, acute lung injury, and related pulmonary disorders.