Paradoxical breathing is identified by channel deflections that are:

Paradoxical breathing is identified by channel deflections that are:

• A. In phase in respiratory effort and out of phase in airflow
• B. Out of phase in airflow with respiratory effort remaining flat
• C. In phase in airflow and in phase in respiratory effort
• D. Out of phase in respiratory effort with airflow remaining flat

Answer: (D)

Paradoxical breathing shows a mismatch between what the patient’s respiratory muscles are doing and what air actually moves. You’ll see the respiratory effort channels (chest/abdomen) deflecting as if the person is attempting to inhale, but the airflow channel remains flat with no measurable flow. That means effort is present without corresponding air movement, which is why this pattern is described as out-of-phase effort with flat airflow. In normal breathing, effort and airflow rise and fall together; here the effort exists but does not translate into airflow, signaling obstructed or ineffective ventilation during the event.

Paradoxical breathing shows a mismatch between what the patient’s respiratory muscles are doing and what air actually moves. You’ll see the respiratory effort channels (chest/abdomen) deflecting as if the person is attempting to inhale, but the airflow channel remains flat with no measurable flow. That means effort is present without corresponding air movement, which is why this pattern is described as out-of-phase effort with flat airflow. In normal breathing, effort and airflow rise and fall together; here the effort exists but does not translate into airflow, signaling obstructed or ineffective ventilation during the event.