A client who received 6 units of packed red blood cells 3 days ago for a lower gastrointestinal (GI) bleed is now displaying signs of shortness of breath with occasional stridor and is reporting muscle cramping.

Reference Range:
Potassium [3.5 to 5 mEq/L (3.5 to 5 mmol/L)]
Magnesium [Adult: 1.3 to 2.1 mEq/L (0.65 to 1.05 mmol/L)]
Calcium [9 to 10.5 mg/dL (2.3 to 2.6 mmol/L)]
Sodium (136 to 145 mEq/L (136 to 145 mmol/L)]

Which serum laboratory value should the nurse immediately report to the healthcare provider?

Potassium 4.7 mEq/L (4.70 mmol/L).

Magnesium 2.1 mEq/L (0.86 mmol/L).

Calcium 6.5 mg/dL (1.63 mmol/L).

Sodium 135 mEq/L (135 mmol/L).

Answer and Explanation

The Correct Answer is C

Choice A reason: Potassium 4.7 mEq/L (4.70 mmol/L) is within the normal reference range of 3.5 to 5 mEq/L (3.5 to 5 mmol/L). Potassium is an electrolyte that helps regulate the balance of fluids and acids in the body, as well as the function of nerves and muscles. A high potassium level (hyperkalemia) can cause muscle weakness, irregular heartbeat, and cardiac arrest. A low potassium level (hypokalemia) can cause muscle cramps, fatigue, and arrhythmias.

Choice B reason: Magnesium 2.1 mEq/L (0.86 mmol/L) is within the normal reference range of 1.3 to 2.1 mEq/L (0.65 to 1.05 mmol/L). Magnesium is an electrolyte that helps regulate the activity of enzymes, muscles, and nerves, as well as the balance of calcium and potassium in the body. A high magnesium level (hypermagnesemia) can cause nausea, vomiting, flushing, muscle weakness, and respiratory depression. A low magnesium level (hypomagnesemia) can cause muscle twitching, tremors, seizures, and cardiac arrhythmias.

Choice C reason: Calcium 6.5 mg/dL (1.63 mmol/L) is below the normal reference range of 9 to 10.5 mg/dL (2.3 to 2.6 mmol/L). Calcium is an electrolyte that helps regulate the function of muscles, nerves, bones, and blood clotting. A high calcium level (hypercalcemia) can cause nausea, vomiting, constipation, confusion, kidney stones, and bone pain. A low calcium level (hypocalcemia) can cause muscle spasms, cramps, tingling, numbness, and stridor (a high-pitched sound when breathing). **This is a critical value that should be immediately reported to the healthcare provider**, as it can indicate a serious condition such as acute pancreatitis, sepsis, or massive blood transfusion.

Choice D reason: Sodium 135 mEq/L (135 mmol/L) is slightly below the normal reference range of 136 to 145 mEq/L (136 to 145 mmol/L). Sodium is an electrolyte that helps regulate the balance of fluids and acids in the body, as well as the function of nerves and muscles. A high sodium level (hypernatremia) can cause thirst, dry mouth, confusion, seizures, and coma. A low sodium level (hyponatremia) can cause headache, nausea, vomiting, fatigue, muscle weakness, and confusion.

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Free Nursing Study Resources

Correct Answer is []

Explanation

The client is most likely experiencing compartment syndrome, which is a condition where increased pressure within a closed space compromises blood flow and tissue perfusion. Compartment syndrome can occur after a fracture, especially if a cast or splint is applied too tightly. Some of the signs and symptoms of compartment syndrome are severe pain, paresthesia, pallor, and pulselessness.
Two actions the nurse should take to address compartment syndrome are:
- Elevate the extremity above the level of the heart to reduce swelling and improve venous return.
- Remove the cast or loosen the dressing to relieve the pressure and restore blood flow. This may require notifying the physician or obtaining an order for bivalving or cutting the cast.
Two parameters the nurse should monitor to assess the client’s condition are:
- Capillary refill of the affected fingers, which should be less than 3 seconds. A prolonged capillary refill indicates poor perfusion and tissue ischemia.
- Blood pressure of the client, which should be maintained within normal limits. Hypotension can worsen the perfusion deficit and lead to tissue necrosis.

A. Fasting blood sugar of 200 mg/dL (11.1 mmol/L). B. Glycosylated hemoglobin A1c of 8%. C. Blood urea nitrogen of 22 mg/dL (7.9 mmol/L). D. Serum creatinine of 1.9 mg/dL (169 umol/L).

Correct Answer is D

Explanation

Choice A reason: Fasting blood sugar of 200 mg/dL (11.1 mmol/L) indicates hyperglycemia, which is a high level of glucose in the blood. It can be caused by diabetes mellitus, stress, infection, or medication. Hyperglycemia can cause symptoms such as thirst, hunger, frequent urination, fatigue, and blurred vision. However, it does not affect the safety or accuracy of MRI with contrast.

Choice B reason: Glycosylated hemoglobin A1c of 8% indicates poor glycemic control over the past three months. It can be caused by diabetes mellitus, chronic kidney disease, or hemoglobinopathy. Glycosylated hemoglobin A1c reflects the average blood glucose level over the lifespan of red blood cells, which is about 120 days. However, it does not affect the safety or accuracy of MRI with contrast.

Choice C reason: Blood urea nitrogen of 22 mg/dL (7.9 mmol/L) indicates mild azotemia, which is a high level of nitrogenous waste products in the blood. It can be caused by dehydration, high protein intake, gastrointestinal bleeding, or kidney impairment. Azotemia can cause symptoms such as nausea, vomiting, confusion, and lethargy. However, it does not affect the safety or accuracy of MRI with contrast.

Choice D reason: Serum creatinine of 1.9 mg/dL (169 umol/L) indicates moderate renal insufficiency, which is a reduced ability of the kidneys to filter and excrete waste products and fluids from the body. It can be caused by diabetes mellitus, hypertension, glomerulonephritis, or nephrotoxic drugs. Renal insufficiency can cause symptoms such as edema, anemia, electrolyte imbalance, and acidosis. It can also increase the risk of contrast-induced nephropathy, which is a sudden deterioration of kidney function after exposure to contrast media used for imaging studies such as MRI. Contrast-induced nephropathy can lead to acute kidney injury, dialysis requirement, or even death. Therefore, serum creatinine should be reported to the healthcare provider before MRI with contrast to assess the risk and benefit of the procedure and to take preventive measures such as hydration, medication adjustment, or alternative imaging modalities.

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Naxlex Comprehensive Predictor Exams

Exhibits Specify which potential condition the client is most likely experiencing, two actions the nurse should take to address that condition, and two parameters the nurse should monitor to assess the client’s response.

Correct Answer is []

Explanation

Correct Answer is D

Explanation

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Patient Data Exhibits Drag from the choices area to specify which condition the client is most likely experiencing, two actions the nurse should take to address that condition, and two parameters the nurse should monitor to assess the client’s progress.

In assessing a client with ulcers on the lower extremity, which findings indicate that the ulcers are likely to be of venous, rather than arterial, origin?

The nurse prepares a teaching plan for an adult client with metabolic syndrome. Which finding(s) should the nurse address to help the client reduce the risk for diabetes mellitus and vascular disease? (Select all that apply.)

A client with diabetes mellitus is admitted with an upper respiratory infection. Which changes in blood glucose management should the client expect?