A nurse is caring for a client who asks why her newborn is receiving a phytonadione injection. Which of the following statements should the nurse make?

C, "You can begin collection of urine after discarding your first morning void."

A 24-hour creatinine clearance test is used to evaluate how well the kidneys are functioning by measuring the amount of creatinine in the blood and urine over a 24-hour period. During the test, the client is asked to discard their first morning void and then collect all urine for the next 24 hours.

Option A is incorrect because a protein-rich diet can affect the creatinine levels in the urine, which can result in inaccurate test results. Therefore, the nurse should advise the client to avoid a protein-rich diet during the collection period.

Option B is incorrect because blood glucose levels are not relevant to a 24-hour creatinine clearance test. Therefore, the nurse should not ask the client to record their blood glucose level each time they void.

Option D is incorrect because using an antiseptic towel to cleanse the perineal area can also affect the test results by introducing contaminants into the urine sample. Therefore, the nurse should advise the client to cleanse the perineal area with soap and water or an alcohol wipe.

Blurred vision in the third trimester of pregnancy can be a potential sign of preeclampsia, a serious condition characterized by high blood pressure and organ damage.

Shortness of breath when climbing stairs is a common symptom in the third trimester as the growing uterus puts pressure on the diaphragm and limits lung expansion. While it is important to monitor the client's respiratory status, it is not an immediate cause for concern unless accompanied by severe or persistent shortness of breath.

Leukorrhea refers to an increase in vaginal discharge during pregnancy, which is a normal physiological change. It is typically white or clear and does not indicate any immediate problems unless it is accompanied by other symptoms such as itching, foul odor, or irritation.

Numbness or tingling in the fingers during pregnancy can be caused by pressure on nerves due to fluid retention or changes in the body's circulation. While it can be uncomfortable, it is not typically considered an urgent issue unless it is severe, persistent, or accompanied by other concerning symptoms.