Final answer:
When a client with preeclampsia is receiving magnesium sulfate, the nursing assessment should include monitoring respiratory rate, blood pressure, urine output, and capillary refill time.
Step-by-step explanation:
During the administration of magnesium sulfate to a client with preeclampsia, an ongoing nursing assessment should include monitoring the respiratory rate, blood pressure, urine output, and capillary refill time. These assessments are important to ensure the client's safety and to detect any potential complications or side effects of the medication.