Final answer:
The vital signs that should alert the nurse of possible hemorrhage are a rapid increase in heart rate and a decrease in blood pressure, indicating hypovolemic shock due to blood loss.
Step-by-step explanation:
The student is asked which vital sign change should alert the PACU nurse that the client who had a right nephrectomy might be hemorrhaging. The most indicative signs of hemorrhage in a patient are a rapid increase in heart rate and a decrease in blood pressure. Specifically, option (a) heart rate increased to 120/min and option (b) blood pressure decreased to 120/60 mm Hg, when considered together, strongly suggest the possibility of hemorrhage. This is because the body will respond to a loss of blood volume by increasing the heart rate to maintain cardiac output and tissue perfusion, but as blood loss continues, blood pressure will eventually drop. This response is a hallmark of hypovolemic shock caused by hemorrhage, where the heart tries to compensate for reduced blood volume by pumping more quickly (tachycardia), but peripheral resistance lowers the blood pressure.