A patient with ALI is being ventilated using APRV with the following settings: P_high = 30 cm H₂O;P_low = 2 cm H₂O;T_high = 6 sec;T_low = 0.8 sec;F_IO₂ = 0.4.The patient's spontaneous rate is 12 breaths/min.The current ABG values are: PaO₂= 61 mm Hg;PaCO₂ = 43 mm Hg.What change should the respiratory therapist recommend for this patient?

Question

Quizplus · Accepted Answer

To improve oxygenation during the use of APRV,the P_high establishes the mP_aw,which maintains oxygenation by restoring the functional residual capacity.Decreasing the P_high would derecruit some alveoli and may create a more difficult situation.Increasing the T_high may be done in 0.5- to 2-second intervals until the oxygenation target is achieved.The T_low aids the removal of CO₂and helps determine tidal volume.

A Patient with ALI Is Being Ventilated Using APRV with the Following