NREMT Paramedic Level Quiz: Endocrine And Metabolic Emergencies
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Endocrine And Metabolic EmergenciesQuestion 1 of 20

Comatose diabetic: glucose 780, pH 7.38, no ketones, osmolality 350. What explains the coma?

Ketoacidosis
Hyperosmolality
Hyperkalemia
Lactic acidosis
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NREMT Paramedic Level Quiz

NREMT Paramedic Level Quiz: Endocrine And Metabolic Emergencies

Practice Endocrine And Metabolic Emergencies in NREMT Paramedic Level with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Endocrine And Metabolic Emergencies, giving you a quick way to practice the rules, question types, and explanations that matter most for NREMT Paramedic Level.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Comatose diabetic: glucose 780, pH 7.38, no ketones, osmolality 350. What explains the coma?

  1. Ketoacidosis
  2. Hyperosmolality (correct answer)
  3. Hyperkalemia
  4. Lactic acidosis
Explanation: The coma is caused by severe hyperosmolality: glucose 780 and osmolality 350 create an osmotic shift that draws water out of brain cells. Ketoacidosis is tempting, but pH 7.38 and no ketones rule it out. Hyperkalemia and lactic acidosis wouldn't match these labs.

Question 2

A malnourished alcoholic is comatose. Which mechanism best explains the hypoglycemia?

  1. Stimulates insulin release
  2. Enhances glycogen breakdown
  3. Blocks hepatic gluconeogenesis (correct answer)
  4. Increases tissue glucose use
Explanation: Alcohol metabolism raises NADH in the liver, which blocks gluconeogenesis, so the liver cannot make glucose to replace depleted glycogen stores in a malnourished alcoholic. That directly explains the coma-level hypoglycemia. The tempting wrong answer is increased insulin release, but alcohol suppresses insulin; this hypoglycemia is not insulin-driven.

Question 3

Thyroid storm with fever. Why avoid aspirin for the fever?

  1. It causes hypoglycemia
  2. It causes hyperkalemia
  3. It worsens hypotension
  4. It raises free hormone (correct answer)
Explanation: In thyroid storm, aspirin displaces thyroid hormone from serum binding proteins, so free T3 and T4 rise and the crisis worsens. Fever is treated with acetaminophen and active cooling instead. The tempting wrong answer is hypoglycemia: aspirin can lower glucose, but that is not the reason it is avoided here.

Question 4

Which findings best distinguish adrenal crisis from septic shock?

  1. Hypotension and tachycardia
  2. Fever and high WBC count
  3. Hyponatremia and hyperkalemia (correct answer)
  4. Hyperglycemia and ketosis
Explanation: Adrenal crisis causes mineralocorticoid deficiency, so you see hyponatremia and hyperkalemia along with hypotension and hypoglycemia. Septic shock does not classically produce this pair. Hypotension and tachycardia are shared by both and don't distinguish them, while fever and a high WBC count suggest infection but can also occur with adrenal crisis.

Question 5

DKA, glucose 612, K+ 2.9, pH 7.1. What is the correct first action?

  1. Hold insulin; give potassium (correct answer)
  2. Insulin bolus, then fluids
  3. Start insulin and potassium
  4. Fluids, insulin, bicarbonate
Explanation: Severe hypokalemia (K+ 2.9) takes priority over insulin in DKA. Insulin drives potassium into cells and would deepen the deficit, risking lethal dysrhythmia. The tempting error is starting insulin immediately to correct pH 7.1; instead hold insulin, give potassium, and once K+ is above 3.3, treat the DKA with insulin and fluids.

Question 6

You are treating a 45-year-old male with a known history of Addison's disease who is hypotensive and confused following a bout of gastroenteritis. His vital signs are: blood pressure 78/40 mmHg, pulse 110 beats/min, and respirations 22 breaths/min. Despite a 1-liter normal saline bolus, his blood pressure remains 80/44 mmHg. His blood glucose is 55 mg/dL.

Given this patient's refractory hypotension, what is the most appropriate next intervention?

  1. Administer a second 1-liter fluid bolus of normal saline.
  2. Administer 100 mg of hydrocortisone intravenously per protocol. (correct answer)
  3. Initiate a vasopressor infusion, such as norepinephrine.
  4. Administer 50 mL of 50% dextrose intravenously.
Explanation: This patient is in an Addisonian crisis, an acute adrenal insufficiency. The hallmark is hypotension that is refractory to fluid and vasopressor therapy. The definitive treatment is replacing the deficient corticosteroids. Administering hydrocortisone will address the underlying cause of the shock. While dextrose is needed for the hypoglycemia and more fluids may eventually be given, the priority is to correct the steroid deficiency causing the shock.

Question 7

An elderly female is found unresponsive in her home during a winter storm. The ambient temperature in the home is low. She is bradycardic at 44 beats/min, hypotensive at 88/50 mmHg, and has a respiratory rate of 8 breaths/min. Her skin is cool, pale, and has a non-pitting, doughy edema. Her blood glucose is 65 mg/dL.

This patient's presentation is most consistent with which underlying endocrine emergency?

  1. Severe hypoglycemia.
  2. Diabetic Ketoacidosis.
  3. Myxedema coma. (correct answer)
  4. Adrenal insufficiency.
Explanation: Myxedema coma is a life-threatening complication of severe hypothyroidism. The classic presentation includes profound hypothermia, bradycardia, hypotension, hypoventilation, altered mental status, and hypoglycemia. The non-pitting, doughy edema (myxedema) is a hallmark sign. The other conditions do not fit the complete clinical picture, especially the profound bradycardia and hypothermia.

Question 8

You are called for a 52-year-old male found unresponsive at a homeless shelter. He has a known history of chronic alcoholism and malnutrition. Vital signs are stable. His blood glucose is 30 mg/dL. After administering 25g of dextrose IV, his mental status improves slightly but he remains profoundly confused.

Given the patient's history and incomplete response to dextrose, the paramedic should have a high index of suspicion for what co-existing condition?

  1. The need for an additional ampule of D50W to correct the hypoglycemia.
  2. Wernicke's encephalopathy, which requires thiamine administration. (correct answer)
  3. The ineffectiveness of dextrose, requiring a switch to intramuscular glucagon.
  4. A post-ictal state from a seizure caused by alcohol withdrawal.
Explanation: Chronic alcoholics are often thiamine deficient. Administering a glucose load can precipitate or worsen Wernicke's encephalopathy, a neurological emergency presenting with confusion, ataxia, and ophthalmoplegia. The patient's incomplete response to dextrose should raise suspicion for this condition. Standard of care is to administer thiamine with or before glucose in at-risk patients. Glucagon is ineffective in patients with depleted glycogen stores, such as this patient.

Question 9

An 80-year-old female with type 2 diabetes accidentally took her glyburide twice today. She is found diaphoretic and confused with a blood glucose of 40 mg/dL. You administer 25g of dextrose IV, and she becomes alert and oriented.

Given the pharmacological properties of glyburide, what is the most important disposition consideration for this patient?

  1. She can be safely released if her blood glucose remains stable for one hour on scene.
  2. Glucagon is the preferred antidote for sulfonylurea-induced hypoglycemia.
  3. The patient is at high risk for recurrent hypoglycemia and requires hospital admission. (correct answer)
  4. Administration of oral glucose paste is sufficient to prevent recurrence of symptoms.
Explanation: Glyburide is a long-acting sulfonylurea oral hypoglycemic agent. It stimulates the pancreas to release insulin, and its effects can last for many hours. Even after initial correction with IV dextrose, the drug will continue to work, placing the patient at extremely high risk for recurrent and potentially profound hypoglycemia. All patients with sulfonylurea overdose require hospital admission for prolonged glucose monitoring.

Question 10

A 22-year-old male with type 1 diabetes presents with nausea, vomiting, and abdominal pain. He is breathing deeply and rapidly at 32 breaths/min. His blood glucose is 450 mg/dL. His quantitative waveform capnography shows an end-tidal carbon dioxide (ETCO2) reading of 18 mmHg.

What is the correct interpretation of this ETCO2 value in the context of this patient's presentation?

  1. The patient is developing respiratory failure and requires immediate assisted ventilation.
  2. The value indicates a state of metabolic alkalosis from persistent vomiting.
  3. It reflects a significant respiratory compensation for an underlying metabolic acidosis. (correct answer)
  4. The reading is an artifact caused by the patient's rapid respiratory rate.
Explanation: The patient is in Diabetic Ketoacidosis (DKA), a state of severe metabolic acidosis. The body compensates by increasing the rate and depth of breathing (Kussmaul respirations) to 'blow off' CO2, which is an acid in the blood. This compensatory hyperventilation results in a low ETCO2 reading. A low ETCO2 in this setting correlates with the severity of the acidosis and indicates a physiological compensation, not respiratory failure.

Question 11

A 40-year-old female who recently underwent a total thyroidectomy complains of muscle cramps and tingling sensations in her hands and around her mouth. When you inflate a blood pressure cuff on her arm to 20 mmHg above her systolic pressure, her hand and wrist flex into a carpopedal spasm.

This physical exam finding, known as Trousseau's sign, is indicative of what electrolyte imbalance?

  1. Hyperkalemia.
  2. Hypocalcemia. (correct answer)
  3. Hypermagnesemia.
  4. Hyponatremia.
Explanation: The parathyroid glands, which regulate calcium levels, are often located near or embedded in the thyroid gland and can be inadvertently damaged or removed during a thyroidectomy. This can lead to hypoparathyroidism and subsequent hypocalcemia. Hypocalcemia increases neuromuscular excitability, causing symptoms like paresthesias and muscle cramps. Trousseau's sign (carpopedal spasm) and Chvostek's sign are classic physical findings of hypocalcemia.

Question 12

You are treating a patient with suspected life-threatening hyperkalemia based on a history of renal failure and a wide-complex bradycardia on the ECG. Under medical direction, you are preparing to administer medications.

Which intervention directly counteracts the cardiotoxic effects of potassium on the myocardial cell membrane?

  1. Administering a nebulized high-dose albuterol treatment.
  2. Administering an infusion of sodium bicarbonate.
  3. Administering 25 grams of dextrose along with regular insulin.
  4. Administering 1 gram of calcium chloride via slow IV push. (correct answer)
Explanation: When you encounter hyperkalemia with cardiac manifestations, you need to distinguish between treatments that stabilize the heart versus those that lower potassium levels. The key insight is that life-threatening hyperkalemia requires immediate cardiac protection, which only one intervention provides directly. Calcium chloride (answer D) is correct because it directly antagonizes potassium's effects on cardiac cell membranes. Hyperkalemia depolarizes myocardial cells by altering the potassium gradient, leading to conduction abnormalities and arrhythmias. Calcium doesn't lower potassium levels—instead, it stabilizes the cardiac membrane potential and restores normal electrical conduction within minutes. This makes it the first-line treatment for hyperkalemic cardiotoxicity. The other options all work by shifting potassium into cells, which takes longer and doesn't directly counteract membrane effects. Answer A (albuterol) activates beta-2 receptors that drive potassium intracellularly through the sodium-potassium pump. Answer B (sodium bicarbonate) alkalinizes blood, promoting cellular potassium uptake. Answer C (dextrose and insulin) forces glucose and potassium into cells together—insulin is actually the primary mechanism here, with dextrose preventing hypoglycemia. While options A, B, and C are all valid hyperkalemia treatments, they're indirect approaches that lower serum potassium rather than immediately protecting the heart from its effects. Study tip: Remember "Calcium for Cardioprotection"—when you see life-threatening hyperkalemia with ECG changes, calcium is your immediate cardiac stabilizer, while other treatments work as potassium-shifting agents with delayed onset.

Question 13

You are dispatched to a 50-year-old male for a "panic attack." You find him complaining of a sudden, severe pounding headache, palpitations, and profuse sweating. His vital signs are: blood pressure 240/130 mmHg, pulse 140 beats/min, and respirations 24 breaths/min. He has no psychiatric history and denies illicit drug use.

These episodic, severe hypertensive crises should make a paramedic suspicious of which underlying endocrine disorder?

  1. Thyroid storm.
  2. Pheochromocytoma. (correct answer)
  3. Cushing's syndrome.
  4. Adrenal insufficiency.
Explanation: A pheochromocytoma is a rare catecholamine-secreting tumor of the adrenal medulla. It causes the release of large amounts of epinephrine and norepinephrine, leading to the classic triad of symptoms: episodic headaches, palpitations, and diaphoresis (sweating), accompanied by severe hypertension. While a thyroid storm also causes hypertension and tachycardia, the paroxysmal (sudden, episodic) nature of the symptoms is highly characteristic of a pheochromocytoma.

Question 14

You are treating an 8-year-old female in Diabetic Ketoacidosis. She is lethargic with a blood glucose of 480 mg/dL and exhibits signs of moderate dehydration.

When initiating intravenous fluid therapy for this child, what is a critical consideration to prevent iatrogenic cerebral edema?

  1. Using a hypotonic solution like 0.45% NaCl is preferred for faster rehydration.
  2. Administering a rapid fluid bolus of 40 mL/kg is necessary to restore perfusion.
  3. Withholding all fluids until a precise serum sodium level can be obtained in the ED.
  4. Calculating and administering fluids more cautiously than in adults to avoid rapid osmolality shifts. (correct answer)
Explanation: Children with DKA are at a significantly higher risk than adults for developing cerebral edema, a devastating complication. It is thought to be caused by rapid shifts in fluid and serum osmolality during treatment. Therefore, fluid resuscitation in pediatric DKA is more cautious, typically involving a smaller initial bolus (e.g., 10-20 mL/kg) of isotonic crystalloid, with the remaining fluid deficit corrected slowly over 24-48 hours. Rapid boluses and hypotonic solutions are avoided.

Question 15

An 18-year-old female with a history of an eating disorder presents with weakness and muscle cramping. She admits to several days of self-induced vomiting. Her respiratory rate is 10 breaths/min and shallow. Her ECG shows a sinus tachycardia with flattened T-waves and the presence of U-waves.

These clinical and ECG findings are most consistent with a metabolic alkalosis and what associated electrolyte disturbance?

  1. Hyperkalemia.
  2. Hypomagnesemia.
  3. Hypercalcemia.
  4. Hypokalemia. (correct answer)
Explanation: When you encounter a patient with an eating disorder and self-induced vomiting, immediately consider the acid-base and electrolyte disruptions this creates. Vomiting causes loss of gastric acid (HCl), leading to metabolic alkalosis, while also depleting key electrolytes. The clinical picture here points directly to hypokalemia. The ECG findings are classic: flattened T-waves and U-waves are pathognomonic signs of low potassium. Combined with the muscle weakness, cramping, and shallow respirations (hypokalemia weakens respiratory muscles), this creates a clear diagnostic pattern. Potassium is lost through vomiting both directly and indirectly - the metabolic alkalosis causes intracellular potassium shifting, worsening the depletion. Looking at the wrong answers: (A) Hyperkalemia would cause peaked T-waves and widened QRS complexes, the opposite of what's described. (B) Hypomagnesemia can occur with eating disorders but doesn't typically cause the specific ECG changes seen here - it's more associated with seizures and tetany. (C) Hypercalcemia would cause shortened QT intervals and potential AV blocks, not the T-wave flattening and U-waves present. The respiratory rate of 10 breaths/min also supports this diagnosis - it represents compensatory hypoventilation for the metabolic alkalosis, retaining CO₂ to normalize pH. Remember this pattern: eating disorders + vomiting + muscle weakness + flattened T-waves/U-waves = hypokalemia with metabolic alkalosis. These ECG changes are among the most reliable indicators of potassium depletion you'll see in the field.

Question 16

A 68-year-old male with end-stage renal disease who missed his last two dialysis appointments complains of generalized weakness and palpitations. His cardiac monitor shows a sinus bradycardia at 50 beats/min with tall, peaked T waves, a widened QRS complex, and diminished P wave amplitude.

These ECG findings are most indicative of which metabolic emergency?

  1. Severe hypocalcemia.
  2. Digitalis toxicity.
  3. Significant hyperkalemia. (correct answer)
  4. Myxedema coma.
Explanation: The ECG progression described is classic for hyperkalemia. It begins with tall, peaked T waves, followed by P wave flattening, PR interval prolongation, and QRS complex widening. If untreated, it can progress to a 'sine wave' pattern and ventricular fibrillation or asystole. This is a common and life-threatening emergency in patients with renal failure.

Question 17

An 82-year-old female with a history of type 2 diabetes is found unresponsive. Her caregiver reports she has had a urinary tract infection for a week. Her vital signs are: blood pressure 90/50 mmHg, pulse 128 beats/min, respirations 30 breaths/min and shallow, SpO2 94% on room air, and temperature 101.2°F (38.4°C). The blood glucose level is too high for the glucometer to read. You note dry mucous membranes and poor skin turgor.

Which finding would most strongly suggest Hyperosmolar Hyperglycemic State (HHS) over Diabetic Ketoacidosis (DKA) in this patient?

  1. The presence of profound dehydration and significant tachycardia.
  2. A serum glucose level that is likely greater than 600 mg/dL.
  3. An absence of Kussmaul respirations and fruity odor on the breath. (correct answer)
  4. An altered mental status that has progressed to unresponsiveness.
Explanation: The key pathophysiological difference between HHS and DKA is the presence of some insulin in HHS, which is sufficient to prevent the widespread breakdown of fats into ketones. This lack of significant ketosis means the patient will not develop the deep, rapid (Kussmaul) respirations to compensate for acidosis, nor will they have the characteristic fruity (acetone) odor on their breath. The other findings (dehydration, high glucose, altered mental status) are common to both conditions, although typically more extreme in HHS.

Question 18

In the initial management of a patient in Diabetic Ketoacidosis (DKA), the paramedic understands that despite a total body potassium deficit, the initial serum potassium level may be normal or even high. What is the primary pathophysiological reason for this phenomenon?

  1. Acidosis causes potassium to shift from the intracellular to the extracellular space. (correct answer)
  2. Severe dehydration and hemoconcentration falsely elevate the serum potassium reading.
  3. Acute kidney injury associated with DKA prevents the normal excretion of potassium.
  4. The absence of insulin prevents potassium from being transported into the cells.
Explanation: In an acidotic state like DKA, the body attempts to buffer the excess hydrogen ions (H+) in the blood by moving them into cells. To maintain electrical neutrality, potassium ions (K+) move out of the cells into the bloodstream. This intracellular-to-extracellular shift can result in a normal or high serum potassium level, masking the true total body deficit caused by osmotic diuresis. The absence of insulin also contributes (D), but the primary driver of the initial high reading is the acidosis-induced shift (A).

Question 19

You respond to a 74-year-old male with a history of small cell lung cancer who is having a generalized seizure. After the seizure stops, he is lethargic. Vital signs are stable and blood glucose is 98 mg/dL. His wife states he has been drinking excessive amounts of water and becoming progressively more confused over the past few days.

Which underlying metabolic abnormality is the most likely cause of this patient's seizure?

  1. Hyperglycemia due to steroid treatment for his cancer.
  2. Hyponatremia secondary to Syndrome of Inappropriate Antidiuretic Hormone (SIADH). (correct answer)
  3. Hypercalcemia of malignancy leading to neurologic irritability.
  4. Hypokalemia resulting from chemotherapy side effects.
Explanation: Small cell lung cancer is a common cause of SIADH, a condition where the body produces too much antidiuretic hormone. This leads to water retention and a dilutional hyponatremia (low serum sodium). Severe hyponatremia causes cerebral edema, which can manifest as confusion, lethargy, and seizures. The other options are less likely to present with seizures in this context.

Question 20

You are treating a 30-year-old known diabetic who is unconscious with a blood glucose level of 25 mg/dL. Due to her unresponsiveness and intermittent seizure-like activity, you are unable to establish intravenous access after multiple attempts.

What is the most appropriate next action in managing this patient?

  1. Administer 1 mg of glucagon via the intramuscular route. (correct answer)
  2. Immediately attempt intraosseous access for dextrose administration.
  3. Administer high-flow oxygen and transport, deferring glucose administration.
  4. Attempt to administer oral glucose gel to the buccal mucosa.
Explanation: In a patient with severe hypoglycemia where IV access cannot be obtained, intramuscular glucagon is the indicated treatment. Glucagon stimulates the liver to convert glycogen stores into glucose, raising the blood sugar level. While IO access is an option, it is more invasive and time-consuming than a simple IM injection. Deferring treatment is inappropriate, and administering anything orally to an unconscious patient poses a significant aspiration risk.