Inverse ratio ventilation

Inverse Ratio Ventilation

Inverse Ratio Ventilation (IRV) is a mode of mechanical ventilation with a longer inspiratory phase compared to the expiratory phase. It is often used in the management of ARDS and other severe lung conditions.

Pronunciation

Inverse Ratio Ventilation: /ɪnˈvɜːs ˈreɪʃɪoʊ vɛntɪˈleɪʃən/

Etymology

The term "Inverse Ratio Ventilation" is derived from the fact that the ratio of inspiration to expiration is reversed (or "inverted") compared to normal breathing patterns.

Definition

In normal breathing, the expiratory phase is longer than the inspiratory phase, typically in a ratio of 1:2. In Inverse Ratio Ventilation, this ratio is reversed, often to 2:1 or greater, meaning that the patient spends more time in the inspiratory phase. This can help to improve oxygenation in patients with severe lung disease.

Indications

Inverse Ratio Ventilation is typically used in patients with severe lung disease, such as ARDS, Pneumonia, and Pulmonary Edema. It can also be used in patients with COPD who are not responding to conventional ventilation strategies.

Related Terms

• Mechanical Ventilation
• ARDS
• Pneumonia
• Pulmonary Edema
• COPD

See Also

• PEEP
• PCV
• VCV

External links

• Medical encyclopedia article on Inverse ratio ventilation
• Wikipedia's article - Inverse ratio ventilation

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