In a patient with cardiogenic shock who has responded to IV milrinone, NIPPV, and IV furosemide, which sign should alert the nurse that an intra-aortic balloon pump (IABP) is needed?

• A. Weight gain
• B. Clear lungs on auscultation
• C. Improving mental status
• D. Decreasing BP

Answer: (D)

In cardiogenic shock, a falling blood pressure despite aggressive medical therapy signals that the heart is not delivering enough output and that additional circulatory support is needed. An intra-aortic balloon pump is used to improve cardiac output by boosting coronary blood flow during diastole and by reducing afterload during systole, which helps raise blood pressure and end-organ perfusion. So when the patient’s BP decreases even after IV milrinone, NIPPV, and IV furosemide, that persistent hypotension indicates the heart is struggling and IABP may be warranted.

Weight gain suggests fluid retention, which can occur but isn’t a direct trigger for IABP. Clear lungs and improving mental status point to better perfusion and oxygenation, not to a need for mechanical support.