What might increase inspiratory times consistently indicate in the context of Pressure Support Ventilation?

• A. Proper lung compliance.
• B. Possible airway resistance issue.
• C. Effective ventilator settings.
• D. Improved lung function.

Answer: (B)

In the context of Pressure Support Ventilation, consistently increased inspiratory times suggest there may be an issue with airway resistance. When a patient is attempting to inhale, if the resistive pressure against airflow increases, it can lead to prolonged inspiratory times. This can occur due to factors such as bronchospasm, secretions in the airways, or a narrowed airway. Essentially, if the resistance is high, the patient may require more time to draw air into the lungs, which could indicate a blockage or difficulty in airflow.

While lung compliance and ventilator settings can influence breathing patterns, they do not specifically correlate with consistently increased inspiratory times as clearly as airway resistance. Similarly, improved lung function would typically be associated with decreased inspiratory times, not an increase. Thus, the presence of prolonged inspiratory times primarily serves as a signal to assess for possible issues with airway resistance.