A nurse is caring for a client who has nausea and is vomiting. The nurse should identify that the client is at risk for which of the following acid-base imbalances?

The correct answer is c. Muscle weakness.

Choice A: Hypertension

Reason: Hypertension, or high blood pressure, is not a typical manifestation of hypokalemia. Hypokalemia primarily affects muscle function and the nervous system. While potassium imbalances can influence blood pressure, hypertension is more commonly associated with hyperkalemia (high potassium levels) rather than hypokalemia.

Choice B: Cerebral Edema

Reason: Cerebral edema, which is swelling of the brain, is not a known manifestation of hypokalemia. Hypokalemia affects muscle and nerve function, but it does not directly cause cerebral edema. This condition is more related to severe head injuries, infections, or other medical conditions.

Choice C: Muscle Weakness

Reason: Muscle weakness is a common and significant manifestation of hypokalemia. Potassium is crucial for muscle function, and low levels can lead to muscle weakness, cramps, and even paralysis in severe cases. This is because potassium helps in the transmission of nerve signals to muscles, and a deficiency disrupts this process.

Choice D: Hyperactive Bowel Sounds

Reason: Hyperactive bowel sounds are not typically associated with hypokalemia. In fact, hypokalemia can lead to decreased bowel motility, resulting in symptoms like constipation or ileus (a condition where the intestines do not move properly). This is due to the role of potassium in muscle contractions, including those in the digestive tract.

The correct answer is b. Decreased deep tendon reflexes.

Choice A: Wheezing

Reason: Wheezing is typically associated with respiratory conditions such as asthma, chronic obstructive pulmonary disease (COPD), or allergic reactions. It is not a common manifestation of hyperkalemia. Hyperkalemia primarily affects the muscular and cardiovascular systems rather than the respiratory system.

Choice B: Decreased deep tendon reflexes

Reason: Hyperkalemia can cause neuromuscular symptoms, including muscle weakness and decreased deep tendon reflexes. High potassium levels interfere with the normal function of muscle cells and nerves, leading to these symptoms. This is a direct result of the altered action potentials in neurons caused by elevated potassium levels.

Choice C: Hypoactive bowel sounds

Reason: Hypoactive bowel sounds are generally associated with conditions that cause decreased gastrointestinal motility, such as ileus or bowel obstruction. While hyperkalemia can affect muscle function, it is more likely to cause hyperactive bowel sounds due to increased gastrointestinal motility rather than hypoactive sounds.

Choice D: Cerebral edema

Reason: Cerebral edema is swelling of the brain and is not a typical manifestation of hyperkalemia. It is more commonly associated with conditions such as traumatic brain injury, stroke, or severe infections. Hyperkalemia primarily affects the heart and muscles.