Ketone bodies are found in urine of patients with uncontrolled diabetes due to:?

Appeared in: NORCET 9 Mains - 2025

Explanation

In uncontrolled diabetes, insulin deficiency prevents cells from using glucose for energy.
The body compensates by breaking down stored fat (lipolysis) into free fatty acids.
The liver metabolizes these fatty acids into acetyl-CoA.
Excess acetyl-CoA is converted into ketone bodies (ketogenesis), which are then excreted in the urine.

Option A: Excess sugar (glucose) in the blood leads to hyperglycemia and its excretion in urine (glycosuria), but glucose does not decompose into ketone bodies.
Option B: Impaired kidney function is a potential long-term complication of diabetes, not the cause of ketone production. The kidneys excrete ketones; they do not produce them.
Option D: While protein breakdown (catabolism) does increase in uncontrolled diabetes to supply precursors for gluconeogenesis, it is not the primary source of ketone bodies. Fat metabolism is the main driver of ketogenesis.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of ketonuria in uncontrolled diabetes mellitus as background academic context rather than a clinical decision trigger.
Monitoring for ketones in the urine or blood is a critical nursing action for patients with Type 1 diabetes, especially during illness, stress, or when blood glucose levels are consistently high (e.g., above 250 mg/dL).
The presence of ketones is a warning sign of impending or established Diabetic Ketoacidosis (DKA), a medical emergency requiring immediate intervention to prevent coma and death.
Patient education is vital. Nurses must teach patients and families how to test for ketones, when to test, and when to seek immediate medical help.

How to Approach the Question

First, identify the core concepts in the question: 'ketone bodies,' 'urine,' and 'uncontrolled diabetes.'
Recall the basic metabolic function of insulin: it helps glucose enter cells for energy.
Consider the metabolic state in 'uncontrolled diabetes': there is a lack of insulin action.
Reason what happens when glucose cannot be used for energy. The body must find an alternative fuel source.
Evaluate the options based on this reasoning. The body's main alternative fuel store is fat.
Connect the breakdown of fat to the production of ketone bodies, leading you to the correct answer.

Concept Tested & Keywords

QZvozW8xPh9ArPoyogY2F4

Practise the full NORCET 9 Mains - 2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.