Neonatal Nurse Practitioner Practice Exam

To increase O2 levels effectively in HFJV and conventional ventilation, one should:

1. Decrease iTime

2. Decrease MAP

3. Increase Fio2

4. Decrease Fio2

The correct answer is: Increase Fio2

Increasing the fraction of inspired oxygen (Fio2) is a fundamental approach when attempting to improve oxygen levels in patients receiving high-frequency jet ventilation (HFJV) and conventional ventilation. Fio2 represents the concentration of oxygen in the air mixture being delivered to the patient; therefore, elevating this level directly increases the volume of oxygen available for absorption in the lungs. In conditions where patients present with hypoxemia or decreased oxygen saturation, raising Fio2 can help overcome these challenges by optimizing the oxygen content in the inspired gas, facilitating better diffusion across the alveolar-capillary membrane. By increasing the Fio2, the blood can transport more oxygen to the tissues, improving overall oxygen delivery. In contrast, adjusting ventilation settings such as decreasing inspiratory time or mean airway pressure may not necessarily lead to improved oxygenation, as these factors primarily influence the mechanics of ventilation and not the available oxygen levels in the inspired air. Therefore, increasing Fio2 is a direct and effective means to enhance oxygenation in both HFJV and conventional ventilation scenarios.