Chapter 5: Ventilation Modes - Control Ventilation

Breathe Easy: RT Student Resource for Mechanical Ventilation · LibreTexts

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    • 5.0: Chapter Overview
      This page discusses control modes of mechanical ventilation, highlighting the differences between pressure and volume control. It explores the interrelationship of flow, volume, pressure, and time, along with the impacts of lung compliance and resistance.
    • 5.1: Using Control Modes of Ventilation
      This page discusses the role of mechanical ventilation for patients with inadequate oxygenation or CO2 clearance. It covers various control modes, including Assist Control (A/C) which allows mandatory and patient-triggered breaths, and Intermittent Mandatory Ventilation (IMV) which allows spontaneous breaths but risks breath stacking.
    • 5.2: The Time Variable
      This page emphasizes the importance of the time variable in mechanical ventilation, focusing on inspiratory time (I-time) and flow rates. It explains how adjusting I-time can affect air volume delivery without changing pressure, using balloon analogies. The connection between flow, volume, and time in Volume Control Ventilation is discussed, noting that peak flow influences inspiration duration.
    • 5.3: I-E Ratio
      This page highlights the importance of the inspiratory to expiratory (I:E) ratio in both spontaneous and mechanical ventilation. It explains that normal breathing patterns involve longer expiration times to avoid air trapping, with expiration typically lasting 3-5 times longer than inspiration.
    • 5.4: Putting It All Together- Volume, Pressure and Time
      This page employs a mountain range metaphor to clarify mechanical ventilation principles. Inhalation and exhalation are depicted as climbing and descending mountains, respectively, with PEEP as the starting altitude. Peak heights denote the sum of baseline PEEP and inspiratory pressure, while mountain size indicates air volume. It discusses volume control, pressure control, and inspiratory time, showing that these factors influence ventilation settings.
    • 5.5: Volume Control Ventilation
      This page provides an overview of Volume Control ventilation, detailing its straightforward operation for new clinicians by setting tidal volume and respiratory rate. It focuses on the interplay between pressure, lung compliance, and resistance, underscoring the importance of monitoring pressures such as plateau and transairway pressure to guide treatment decisions and avoid lung injury.
    • 5.6: Pressure Control Ventilation
      This page explains Pressure Control Ventilation (PCV), focusing on how it allows clinicians to set pressure for patient breaths, impacting tidal volumes based on lung compliance and airway resistance. It highlights the need for continuous monitoring to ensure safe tidal volumes, especially in patients with high respiratory drive, and differentiates between plateau and peak inspiratory pressures to prevent alveolar damage.
    • 5.7: Other Ventilation Modes
      This page details different mechanical ventilation modes, including Pressure Regulated Volume Control (PRVC), which adjusts pressure for target volumes; Adaptive Support Ventilation (ASV), which modifies respiratory rates to achieve a minute volume target; Mandatory Minute Ventilation (MMV), ensuring a minimum minute ventilation with support for spontaneous breaths; and Automode, which switches ventilation types based on patient needs.
    • 5.8: Conclusion
      This page explores mechanical ventilation, focusing on the interplay between volume, pressure, inspiratory time, and flow. It explains that in volume control, increased volume raises pressure, while in pressure control, increased pressure raises volume. The effects of flow and inspiratory time on delivery time and pressure are also discussed. Lastly, it addresses how lung compliance and resistance impact the pressure needed to achieve target volumes.
    • 5.9: Self-Check

    This page titled Chapter 5: Ventilation Modes - Control Ventilation was last modified on Fri, 16 Oct 2026 18:00:28 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Yvonne Drasovean via source content that was edited to the style and standards of the LibreTexts platform.