A nurse is reviewing the ABG values of a client. The client has a pH of 7.2, PaCO2 of 60 mm Hg, and HCO3 of 25 mEq/L. The nurse should identify that the client has which of the following acid-base imbalances?

- A. Correct. The nurse should initiate continuous cardiac monitoring because a magnesium level of 2.7 mEq/L indicates hypermagnesemia, which can cause cardiac dysrhythmias, hypotension, and bradycardia.

- B. Incorrect. The nurse should not administer potassium chloride to a client who has hypermagnesemia because it can worsen the condition by increasing the intracellular magnesium level and decreasing the serum calcium level.

- C. Incorrect. The nurse should not provide a diet rich in legumes, nuts, and green vegetables to a client who has hypermagnesemia because these foods are high in magnesium and can increase the serum magnesium level.

- D. Incorrect. The nurse should not monitor the client for tetany because tetany is a sign of hypomagnesemia, not hypermagnesemia. Hypomagnesemia can cause neuromuscular excitability, muscle spasms, and positive Chvostek's and Trousseau's signs

Assign the client to a private room with negative air pressure.

Rationale:

• A. Incorrect. Restricting fresh flowers from the client's room is not necessary for infection control purposes. However, some clients with pulmonary tuberculosis may have hypersensitivity reactions to certain plants or flowers, so the nurse should assess the client's allergies before allowing them in the room.
• B. Incorrect. Maintaining a distance of 1.8 m (6 feet) from the client is not sufficient to prevent transmission of tuberculosis. Visitors should also wear a HEPA respirator and limit their contact time with the client.
• C. Incorrect. A surgical mask is not adequate to protect the nurse from inhaling airborne droplet nuclei that contain Mycobacterium tuberculosis. The nurse should wear a high-efficiency particulate air (HEPA) respirator when providing client care.
• D. Correct. Assigning the client to a private room with negative air pressure is the most effective way to prevent the spread of tuberculosis to other clients and staff members. The room should have at least six air exchanges per hour and an exhaust system that vents directly to the outside.