A patient has blood glucose 615 mg/dl with Glycosuria without ketone bodies in the urine; the nurse anticipates that the patient is experiencing which disease?

1. A

   DKA

2. B

   HHNS

3. C

   Insulinoma

4. D

   Diabetes coma

Appeared in: AIIMS Delhi NO - 2017

Explanation

• The patient's presentation aligns perfectly with the diagnostic criteria for Hyperosmolar Hyperglycemic Nonketotic Syndrome (HHNS).
• HHNS is characterized by extreme hyperglycemia (typically blood glucose levels greater than 600 mg/dL), which is consistent with the patient's 615 mg/dL level.
• A key feature of HHNS is the absence of significant ketosis and acidosis, as seen in the patient's lack of ketone bodies in the urine.
• The presence of glycosuria is expected with such high blood glucose levels, as the renal threshold for glucose reabsorption is exceeded.
• This condition occurs because there is enough circulating insulin to prevent fat breakdown (and thus ketone formation) but not enough to manage the severe hyperglycemia.

Why Other Options Were Wrong

• Option A: Diabetic Ketoacidosis (DKA) is incorrect because it is defined by the presence of hyperglycemia, ketosis (ketones in blood/urine), and metabolic acidosis. This patient has no ketone bodies.
• Option C: An insulinoma is a pancreatic tumor that secretes excessive amounts of insulin. This leads to profound hypoglycemia (low blood sugar), which is the opposite of this patient's severe hyperglycemia.
• Option D: While a patient with HHNS can progress to a coma, 'Diabetes coma' is a general, non-specific term describing a state of unconsciousness. HHNS is the specific underlying medical diagnosis causing the metabolic disturbance.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Differentiation of hyperglycemic emergencies in diabetes mellitus to guide bedside assessment, documentation, and the next nursing action.
• HHNS is a medical emergency with a higher mortality rate than DKA, primarily due to profound dehydration, electrolyte imbalances, and the fact that it often affects older adults with comorbidities.
• The cornerstone of initial management for HHNS is aggressive intravenous fluid resuscitation to correct dehydration and improve tissue perfusion, followed by controlled administration of insulin.
• Nurses must meticulously monitor fluid status, neurological signs (for cerebral edema, a risk during rehydration), vital signs, and electrolyte levels, especially potassium, during treatment.

How to Approach the Question

• First, analyze the key laboratory values provided in the question: blood glucose of 615 mg/dl, presence of glycosuria, and absence of ketone bodies.
• Recognize that a blood glucose of 615 mg/dl represents severe hyperglycemia.
• Identify the most crucial piece of information: the absence of ketones. This is the primary differentiating factor between the two major hyperglycemic emergencies.
• Evaluate the options based on this key finding. DKA is characterized by the presence of ketones, so it can be ruled out.
• Consider HHNS, which is defined by severe hyperglycemia, hyperosmolarity, and a lack of significant ketosis. This perfectly matches the patient's data.
• Eliminate Insulinoma, as it causes hypoglycemia (low blood sugar), the opposite of the patient's condition.

Concept Tested & Keywords

• Concept Tested: Differentiation of hyperglycemic emergencies in diabetes mellitus.
• Stem keywords: blood glucose 615 mg/dl, Glycosuria, without ketone bodies
• Lead-in keywords: anticipates, which disease
• Clinical cues: Blood glucose 615 mg/dl: This value indicates severe hyperglycemia, a critical finding.
• Clinical cues: Without ketone bodies: This is the key negative finding that strongly points away from DKA and towards HHNS.

Question ID

QeC_JZ1xz-3z3kDz38rZjF

Copy ID

Reference Book

E6 Medicine Harrison 22e Part 2 p. 1120-1122

E6 Pharmacology Katzung 16e p. 1195-1197

E6 Nutrition Kumud Khanna 2e p. 343-345