A nurse is caring for a client who has a serum potassium level of 5.5 mEq/L. The provider prescribes polystyrene sulfonate. If this medication is effective, the nurse should expect which of the following changes on the client's ECG?

Restoration of QRS Complex amplitude.

Shortening of P-wave duration.

Widening of the QRS complex.

Reduction of T-wave amplitude.

Answer and Explanation

The Correct Answer is D

The correct answer is choice D: Reduction of T-wave amplitude.

Choice A rationale:

The amplitude of the QRS complex is not directly affected by changes in serum potassium levels. It represents ventricular depolarization, and its restoration would not be an expected outcome of polystyrene sulfonate treatment

Choice B rationale:

Shortening of the P-wave duration is not an expected change with polystyrene sulfonate treatment. The P-wave represents atrial depolarization, which is not significantly impacted by the administration of this medication

Choice C rationale:

Widening of the QRS complex is associated with high serum potassium levels. The goal of polystyrene sulfonate treatment is to lower potassium levels and, thus, return the QRS complex to its normal width

Choice D rationale:

Polystyrene sulfonate aims to reduce serum potassium levels. When effective, this should result in a reduction of T-wave amplitude, which is a common ECG change seen with hyperkalemia

In conclusion, choice D is the correct answer, as a reduction in T-wave amplitude would be the expected change on the client's ECG if polystyrene sulfonate effectively lowers their serum potassium level.

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Correct Answer is B

Explanation

Metabolic alkalosis.

Choice A rationale:

The given blood gas results show a pH of 7.53, which is alkaline (above the normal range of

7.35 to 7.45), and a high bicarbonate level of 36 mEq/L (normal range is 22 to 26 mEq/L). This combination indicates metabolic alkalosis, a condition where there is an excessive accumulation of bicarbonate in the blood, leading to increased pH.

Choice B rationale:

Metabolic alkalosis is characterized by increased blood bicarbonate levels, which can occur due to conditions like vomiting, diuretic use, or excessive ingestion of bicarbonate-containing substances. It results in symptoms such as muscle twitching, tetany, and respiratory depression.

Choice C rationale:

Respiratory alkalosis is characterized by an elevated blood pH and low carbon dioxide levels (hypocapnia). However, the bicarbonate level is not directly related to respiratory alkalosis, making this choice incorrect based on the given information.

Choice D rationale:

Metabolic acidosis is characterized by a decreased blood pH and low bicarbonate levels. The presented blood gas results show an alkaline pH and high bicarbonate, making this choice incorrect.

A. Hypocalcemia. B. Hypernatremia. C. Hyperkalemia. D. Potential Condition. Action to Take 1: Prepare to check a serum albumin level. Action to Take 2: Request a STAT ECG. Parameters to Monitor 1: Serum bicarbonate level. Parameters to Monitor 2: Intake and Output.

Correct Answer is A

Explanation

Hypocalcemia. Action to Take 1: Prepare to check a serum albumin level.

Rationale:

Hypocalcemia can be influenced by changes in serum albumin levels, as calcium may bind to albumin. Correcting calcium levels based on albumin can help determine the actual calcium status. Action to Take 2: Request a STAT ECG. Rationale: Hypocalcemia can lead to prolonged QT intervals on an electrocardiogram (ECG). A STAT ECG is necessary to assess cardiac function and detect any potential arrhythmias. Parameters to Monitor 1: Serum bicarbonate level. Rationale: Monitoring serum bicarbonate levels can help assess the client's acid-base balance and metabolic status. Abnormal bicarbonate levels may indicate metabolic disturbances. Parameters to Monitor 2: Intake and Output. Rationale: Monitoring intake and output is essential to evaluate the client's fluid balance and kidney function. Hypocalcemia can impact renal function, and assessing urine output is crucial.

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A nurse is caring for a client who has a serum potassium level of 5.5 mEq/L. The provider prescribes polystyrene sulfonate. If this medication is effective, the nurse should expect which of the following changes on the client's ECG?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A patient's blood gases show a pH of 7.53 and bicarbonate level of 36 mEq/L. The nurse realizes that the patient is demonstrating which acid-base disorder?

Correct Answer is B

Explanation

Correct Answer is A

Explanation

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A nurse is caring for a client who has a serum potassium level of 5.5 mEq/L. The provider prescribes polystyrene sulfonate. If this medication is effective, the nurse should expect which of the following changes on the client's ECG?