A 22-year-old with sickle cell disease in a vaso-occlusive crisis becomes increasingly hypoxic with new bilateral pulmonary infiltrates. Which intervention should the nurse anticipate as a top priority?
1Maintain PCA opioids and add oral acetaminophen as needed
2Prepare the client for emergent red blood cell exchange transfusion✓ Correct answer
3Reduce the oxygen flow rate to 2 L/min to minimize oxygen toxicity
4Increase IV fluids to 2 times maintenance to improve perfusion
Explanation
In severe acute chest syndrome (ACS) with rapid hypoxia and bilateral infiltrates, emergent red blood cell exchange transfusion is the priority to quickly lower hemoglobin S (HbS) levels below 30%, reducing sickling and improving oxygenation. Simple transfusion may be used for mild ACS but is insufficient here. Option 1 (adding oral acetaminophen to PCA opioids) provides multimodal analgesia but does not address the life-threatening hypoxia and progressive pulmonary disease. Option 3 (reducing oxygen flow) is dangerous because hypoxia worsens sickling; oxygen should be titrated to maintain SpO2 above 92% or the patient's baseline. Option 4 (increasing IV fluids to 2 times maintenance) risks fluid overload and worsening pulmonary edema; IV fluids should be given at 1 to 1.5 times maintenance.
ACS triad: new infiltrate, fever, respiratory symptoms. Severe ACS requires exchange transfusion to reduce HbS <30% and Hb to 10-11 g/dL to avoid hyperviscosity. Oxygen is essential; do not reduce flow when hypoxic.
Hospital day 2 for VOC. SpO2 has dropped from 95 to 84 percent on 6 L NC over 2 hours. New cough, RR 32, temp 38.6 C. CXR shows new bilateral lower lobe infiltrates.
acute chest syndrome — New pulmonary infiltrate with respiratory symptoms in SCD; medical emergency.
exchange transfusion — Removal of patient blood with replacement of donor RBCs; rapidly reduces HbS percentage.
hyperviscosity — Increased blood thickness from over-transfusion; risk of stroke in SCD.