In which patient condition is PRVC considered a poor choice?

• A. Patients with moderate lung disease
• B. Patients in distress with high demand
• C. Patients with stable lung mechanics
• D. Patients requiring low sedation

Answer: (B)

PRVC, or Pressure Regulated Volume Control, is a mode of ventilation that combines elements of both volume and pressure control to provide adequate ventilation while allowing for some degree of patient-triggered assistance.

In situations where patients are in distress with high demand, this mode may not be ideal due to its inherent design and responsiveness. PRVC is geared toward maintaining a target tidal volume while adjusting pressure; however, in patients experiencing high demand—such as those with increased work of breathing or significant respiratory distress—the mode may not respond quickly enough to meet those acute ventilatory needs. This can lead to inadequate ventilation and poor outcomes.

In contrast, other patient conditions such as moderate lung disease, stable lung mechanics, and those requiring low sedation might benefit from the flexibility and assistance PRVC offers without the risks associated with unmet ventilatory demands. In moderate lung disease and with stable lung mechanics, PRVC typically functions effectively to provide appropriate ventilation, while patients requiring low sedation can still benefit from the assistance provided by PRVC without the challenges of high demand situations.