Certified Transport Registered Nurse Certification Practice Exam

Which altitude range is considered the physiologic deficient zone or compensatory stage?

1. 0 - 5,000 ft

2. 5,000 - 10,000 ft

3. 10,000 - 15,000 ft

4. 15,000 - 20,000 ft

The correct answer is: 10,000 - 15,000 ft

The altitude range defined as the physiologic deficient zone, often referred to as the compensatory stage, is generally identified as the area between 10,000 to 15,000 feet. At these elevations, individuals may begin to experience significant physiological changes due to reduced atmospheric pressure and lower oxygen availability. This leads to a state where the body attempts to compensate for decreased oxygen levels by increasing breathing and heart rates, hence the classification of this zone. Understanding this physiological response is crucial in transport nursing, as it informs the assessment and management of patients who may be exposed to these altitudes. Though people may function relatively well at lower elevations, they may start to develop symptoms of altitude sickness or require assistance as they reach the physiological deficient zone. Recognizing this range helps in planning for safe transport and potential interventions for patients.