Resistance to lung ventilation, what are the main sources of motivation and resistance for lung vent

The driving force is the movement of the respiratory muscle nucleus, and the direct force is the difference in air pressure within the lungs and in the pleural space.

Resistance is divided into elastic resistance and inelastic resistance. Among them, the elastic resistance includes the elastic retraction force of the lung itself and the tension of the air-liquid interface on the alveolar surface. The most important of the inelastic resistance is the spinal chain airway resistance, as well as inertial resistance, viscous resistance, etc.

Answer] :d Test Guidance】The resistance of lung ventilation includes two parts: elastic resistance and inelastic resistance. (1) Elastic resistance refers to the main resistance of elastic tissues (lungs and thoracic cage) when deformed under the action of external force, which is the main resistance to calm breathing, and the force generated about the resistance to deformation of the ant, that is, the retraction force.

Elastic resistance is the main resistance to calm breathing, accounting for about 70% of the total resistance of lung ventilation. (2) Inelastic resistance: Inelastic resistance includes inertial resistance, viscous resistance and airway resistance.

Which of the following is false about the description of poor resistance to pulmonary ventilation?

a.Both the lungs and the thoracic cage produce elastic resistance.

b.Pulmonary ventilatory resistance is predominantly inelastic during calm seeping.

c.There are two types: elastic resistance and inelastic resistance.

d.Airway resistance is the main component of inelastic resistance.

e.Inelastic resistance includes airway resistance, inertial obstruction plexus, and viscous resistance.

Correct answer: B

Inelastic resistance includes inertial resistance, viscous resistance, and airway resistance.

Inertial resistance is the factor that prevents the movement of the air flow due to the inertia of the air flow and the organization when starting, changing speed, and commuting. When breathing calmly, the breathing rate is low, the airflow velocity is slow, and the inertial resistance is small, which is negligible.

Viscous resistance comes from the friction that occurs when the tissues are symmetrical when breathing.

Airway resistance comes from the friction between gas molecules and between gas molecules and airways as the gas flows through the respiratory tract, and is the main component of inelastic resistance, accounting for about 80%-90%. Inelastic resistance is generated when a gas flows and increases as the flow velocity increases, so it is a dynamic resistance.

Summary. Resistance to lung ventilation includes elastic resistance and inelastic resistance. When breathing calmly, elastic resistance is the main factor, and the motivation for lung ventilation is mainly used to overcome elastic resistance, and to a lesser extent, to overcome airway resistance.

What are the most important factors in the composition of pulmonary ventilatory resistance and what are the solutions in physiological situations.

Resistance to lung ventilation includes elastic resistance and inelastic resistance. When breathing calmly, elastic resistance is the main factor, and the power of lung ventilation is mainly used to overcome elastic resistance, and secondarily to overcome airway resistance.

What about the solution for physiological situations.

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Increasing the alveolar surfactant, alveolar surfactant has the effect of reducing alveolar surface tension, reducing alveolar epifocal mid-surface tension, alveolar retraction, increasing closed intrapulmonary pressure, and increasing inspiratory resistance, thereby affecting lung ventilation. The main effect of the surfactant in the alveoli is to reduce the surface tension of the alveolar fluid and air interface, which helps to maintain the stability of the alveoli, prevent pulmonary edema, and reduce the inspiratory resistance.

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