Eupnea

Eupnea is the normal, relaxed, quiet breathing that occurs at rest. It is characterized by a regular rhythm and a comfortable rate. Eupnea is also known as normal respiration or quiet breathing.

Definition

Eupnea is defined as a mode of breathing that occurs at rest and expends a minimal amount of energy. It is a type of ventilation that is adequate to meet the body's metabolic needs, as measured by blood gas levels.

Physiology

During eupnea, the diaphragm and intercostal muscles work in concert to ensure efficient and effective respiration. The diaphragm contracts and moves downward, increasing the space in the chest cavity. At the same time, the intercostal muscles contract, raising the rib cage and further expanding the chest cavity. This allows air to flow into the lungs. When these muscles relax, the chest cavity decreases in size, and air is expelled from the lungs.

Clinical significance

Eupnea is the desired outcome in many clinical situations. For example, after surgery or during treatment for a respiratory disease, healthcare providers will monitor a patient's breathing to ensure it is normal and unlabored. If a patient's breathing becomes labored or irregular, it may indicate a problem such as hypoxia, pneumonia, or other complications.

See also

• Tachypnea
• Bradypnea
• Dyspnea
• Apnea
• Hyperventilation
• Hypoventilation

References

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