Emergency Medical Technician (EMT) Intermediate Practice Exam

Which of the following breathing patterns is most indicative of cerebral anoxia?

1. Slow, shallow, irregular respirations

2. Rapid, deep breathing

3. Normal breathing

4. Loud, obstructive breathing

The correct answer is: Slow, shallow, irregular respirations

The most indicative breathing pattern of cerebral anoxia is characterized by slow, shallow, and irregular respirations. Cerebral anoxia, which refers to a deficiency of oxygen in the brain, often leads to altered respiratory patterns as the body's response to a lack of oxygen impacts the control centers in the brain responsible for regulating breathing. These slow, shallow, and irregular respirations reflect that the brain is struggling to maintain normal respiratory function due to inadequate oxygen supply. This may also suggest the presence of brain injury or dysfunction where autonomic control over breathing has been affected. In contrast, rapid, deep breathing typically indicates hyperventilation or a response to conditions like anxiety or metabolic disturbance, which are not directly related to cerebral anoxia. Normal breathing would suggest adequate oxygenation and cerebral function. Lastly, loud, obstructive breathing hints at airway obstruction issues rather than cerebral oxygen deficiency. Thus, the pattern of slow, shallow, and irregular respirations distinctly aligns with the physiological response to cerebral anoxia.