K Bind is given for patients with?

Daman & Diu Staff Nurse - 2018

Pharmacology

Easy

Appeared in: Daman & Diu Staff Nurse - 2018

Explanation

K-Bind is the brand name for calcium polystyrene sulfonate, a medication used to treat high levels of potassium in the blood.
The condition of having abnormally high potassium levels is known as hyperkalemia.
K-Bind is a cation-exchange resin that works in the colon to bind potassium ions in exchange for calcium ions.
The bound potassium is then excreted from the body in the feces, leading to a reduction in serum potassium levels.

Option A: Hypernatremia is a condition of elevated serum sodium levels. Its treatment involves administering hypotonic fluids to correct the water deficit, not using a potassium binder.
Option B: Hypokalemia is a condition of low serum potassium. Administering K-Bind would be contraindicated as it would further decrease the already low potassium levels, potentially causing severe complications like cardiac arrhythmias and muscle weakness.
Option D: Hyponatremia is a condition of low serum sodium. Its treatment depends on the patient's volume status and the severity of the condition, involving fluid restriction or saline administration. It is unrelated to potassium binding.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacological management of hyperkalemia as background academic context rather than a clinical decision trigger.
Nurses administering K-Bind must monitor the patient's serum potassium levels before and after treatment to assess efficacy and prevent hypokalemia.
It is crucial to assess the patient's bowel function before administration, as K-Bind can cause constipation and, in rare cases, serious intestinal complications like necrosis, especially when given with sorbitol.
What if the patient has severe, life-threatening hyperkalemia with ECG changes (e.g., peaked T waves, widened QRS)? In this emergency, K-Bind is too slow-acting. The priority is immediate IV calcium gluconate to stabilize the cardiac membrane, followed by rapid-acting treatments like IV insulin and dextrose to shift potassium into cells, while preparing for definitive treatment like hemodialysis.

How to Approach the Question

First, identify the key term in the question: 'K Bind'. The 'K' is a strong clue, as it is the chemical symbol for potassium.
Next, analyze the suffix '-Bind'. This suggests the medication's function is to bind to something.
Combine the clues: 'K Bind' likely refers to a substance that binds potassium.
Evaluate the options, which are all electrolyte imbalances. Two options relate to potassium: Hypokalemia (low potassium) and Hyperkalemia (high potassium).
Reason that a 'binder' is used to remove an excess of a substance from the body. Therefore, a potassium binder would be used to treat a condition of excess potassium.
Conclude that K-Bind is given for hyperkalemia (high potassium).

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 1 pp. 402-404, 399-401

E6 Gynecology Williams p. 63-85