Final answer:
The assessment findings that require immediate follow-up by the nurse include the client's high blood pressure, severe pain, and history of kidney stones.
Step-by-step explanation:
The assessment findings that require immediate follow-up by the nurse include the client's high blood pressure (160/100 mmHg), as this indicates hypertension, which can be a risk factor for cardiovascular events. Additionally, the client's severe pain (rated at 9 out of 10) and use of a large amount of acetaminophen tablets may indicate a possible overdose and warrant immediate attention. Lastly, the client's history of kidney stones and the presence of blood in their urine could suggest kidney complications that need to be addressed.