RRB Staff Nurse Mumb…: Which of the following clinical findings indicates the patient is experiencing hypokalemia?

RRB Staff Nurse Mumbai-2015

Medical Surgical Nursing

Easy

Appeared in: RRB Staff Nurse Mumbai-2015

Explanation

Hypokalemia (serum potassium less than 3.5 mEq/L) impairs the function of smooth muscles, including those in the gastrointestinal tract.
This impairment leads to decreased peristalsis and bowel motility, which can progress to a serious condition called paralytic ileus.
The resulting accumulation of gas and intestinal contents causes the abdomen to become distended, a key clinical sign.

Option A: Oedema is caused by fluid shifting into the interstitial space, primarily related to sodium and water retention, not low potassium. It's a hallmark of conditions like heart failure, renal failure, or liver disease.
Option B: While hypokalemia causes muscle weakness and cramps, distinct, sharp muscle spasms (tetany) are characteristic signs of hypocalcemia (low calcium) or hypomagnesemia (low magnesium).
Option C: Kussmaul breathing is a pattern of deep, rapid respirations that serves as a compensatory mechanism for severe metabolic acidosis, such as diabetic ketoacidosis (DKA).

Visual 1: ECG Strip - An ECG showing the characteristic changes of hypokalemia, including flattened T waves, ST-segment depression, and the presence of a prominent U wave, helps in visualizing the cardiac impact.
Visual 2: Infographic - An infographic illustrating the systemic effects of hypokalemia on the cardiac, muscular, renal, and gastrointestinal systems provides a comprehensive overview of the condition's manifestations.

Clinical Relevance

Nursing practice connection: Use the key finding related to Clinical manifestations of hypokalemia to guide bedside assessment, documentation, and the next nursing action.
Nurses must monitor for abdominal distention and auscultate for bowel sounds in patients at risk for hypokalemia, as paralytic ileus is a serious complication that requires prompt intervention.
A critical nursing safety principle is that potassium should never be administered as an IV push, as it can cause fatal cardiac arrest. It must be diluted and infused slowly, typically at a rate not exceeding 10 mEq/hr via a peripheral line.
Hypokalemia potentiates the effects of digoxin. Nurses caring for patients on digoxin therapy must be extra vigilant in monitoring potassium levels to prevent digoxin toxicity.

How to Approach the Question

First, identify the core concept from the question stem: you need to find a clinical sign specifically caused by hypokalemia (low potassium).
Next, recall the primary role of potassium in the body, which is crucial for the function of nerve and muscle cells (including skeletal, smooth, and cardiac muscle).
Evaluate each option based on this physiological role:
Consider 'Oedema'. This is related to fluid and sodium balance, not directly a potassium issue. Eliminate it.
Consider 'Muscle spasms'. While potassium affects muscles, true spasms (tetany) are a classic sign of low calcium. Hypokalemia causes weakness and cramps. This is a close distractor, but less specific. Eliminate it.
Consider 'Kussmaul Breathing'. This is a specific respiratory pattern to compensate for metabolic acidosis. Eliminate it.

Concept Tested & Keywords

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