During care of a patient with an IABP, which finding would indicate the device is providing the intended effect?

• A. Worsening edema
• B. Improved systolic BP and pulse pressure
• C. Rising creatinine
• D. Decreased oxygen saturation

Answer: (B)

The key idea is that an IABP should improve perfusion by enhancing forward flow and coronary perfusion. It does this by inflating during diastole to raise diastolic pressure and perfuse the heart muscle, then deflating just before systole to reduce afterload. This combination helps the heart eject more effectively, which is reflected as an increase in systolic blood pressure and in pulse pressure (the gap between systolic and diastolic pressures). So seeing improved systolic BP and a wider pulse pressure signals the device is providing the intended support. Values like worsening edema, rising creatinine, or falling oxygen saturation point to fluid overload, renal dysfunction, or hypoxemia and do not indicate the IABP is functioning as intended.