A client with renal calculi is experiencing hematuria and reports severe flank pain.
Which intervention should the nurse implement first?

• A bowel patern is the frequency, consistency, and appearance of a person's bowel movements. A normal bowel patern is what's normal for each person, and it can vary depending on factors such as diet, age, physical activity, and health conditions.
• A focused gastrointestinal system assessment includes collecting subjective data about the patient's history of gastrointestinal disease, signs and symptoms of gastrointestinal problems, diet and nutrition, and bowel patern. It also includes inspecting and auscultating the abdomen for any abnormalities³.
• When a client reports having a bowel movement three days ago, the first action that the practical nurse should implement is to determine the client's usual bowel patern. This will help to evaluate if the client is experiencing constipation or if this is their normal frequency. It will also help to identify any changes or risk factors that may affect the client's bowel function.

Therefore, option B is the correct answer, while options A, C, and D are incorrect.

Option A is incorrect because administering a stool softener without assessing the client's bowel patern may not be appropriate or effective.

Option C is incorrect because encouraging ambulation may help to stimulate bowel activity, but it is not the first action to take.

Option D is incorrect because recommending dietary changes may be helpful for preventing or treating constipation, but it is not the first action to take.

This is the correct answer because BUN and creatinine are the most important laboratory values to monitor for nephrotoxicity, which is the damage or injury to the kidneys caused by certain drugs or chemicals.
Nephrotoxicity can impair the kidneys' ability to filter waste products from the blood, resulting in elevated levels of BUN and creatinine. The normal range for BUN is 7 to 20 mg/dL, and for creatinine is 0.6 to 1.2 mg/dL. The practical nurse (PN) should review these values before administering an antibiotic that can cause nephrotoxicity, such as aminoglycosides, cephalosporins, vancomycin, or sulfonamides. The PN should also monitor the client for signs and symptoms of nephrotoxicity, such as decreased urine output, edema, hypertension, fatigue, nausea, and confusion.
a) Serum calcium
This is not the correct answer because serum calcium is not directly related to nephrotoxicity. Serum calcium is the amount of calcium in the blood, which is important for bone health, muscle contraction, nerve function, and blood clotting. The normal range for serum calcium is 8.5 to 10.2 mg/dL. Serum calcium may be affected by kidney disease, but it is not a reliable indicator of nephrotoxicity.

b) Hemoglobin and hematocrit
This is not the correct answer because hemoglobin and hematocrit are not directly related to nephrotoxicity. Hemoglobin is the protein in red blood cells that carries oxygen, and hematocrit is the percentage of red blood cells in the blood. The normal range for hemoglobin is 13.5 to 17.5 g/dL for men and 12 to 15.5 g/dL for women, and for hematocrit is 38.8 to 50% for men and 34.9 to 44.5% for women.

Hemoglobin and hematocrit may be affected by kidney disease, but they are not reliable indicators of
nephrotoxicity.

c) White blood cell count (WBC)
This is not the correct answer because WBC is not directly related to nephrotoxicity. WBC is the number of white blood cells in the blood, which are part of the immune system and fight infections. The normal range for WBC is 4,500 to 10,000 cells per microliter of blood. WBC may be elevated in response to an infection or inflammation, but it is not a reliable indicator of nephrotoxicity.