D444 Adult Health I
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Free D444 Adult Health I Questions
1. Describe how Kayexalate functions in the treatment of hyperkalemia.
- Kayexalate replaces potassium with sodium in the body.
- Kayexalate increases potassium absorption in the intestines.
- Kayexalate is a diuretic that eliminates potassium through urine.
- Kayexalate binds potassium in the gut, reducing its levels in the bloodstream.
Explanation
Kayexalate (sodium polystyrene sulfonate) is a potassium-binding resin used to treat hyperkalemia, a condition characterized by elevated potassium levels in the blood. It works by binding potassium ions in the gastrointestinal tract in exchange for sodium ions. This prevents potassium from being absorbed and promotes its excretion through the feces, thereby reducing serum potassium levels. While effective, it acts slowly and is typically used alongside other rapid interventions such as insulin with glucose or calcium gluconate in cases of severe hyperkalemia.
2. What is a common clinical sign associated with venous insufficiency?
- Numbness in the fingers
- Swelling in the feet and ankles
- Shortness of breath
- Chest pain
Explanation
Venous insufficiency occurs when the veins in the lower extremities are unable to return blood effectively to the heart, often due to damaged valves or vein obstruction. This leads to blood pooling in the legs and feet, resulting in edema, or swelling. Swelling in the feet and ankles is one of the most common and observable clinical signs of venous insufficiency. Additional signs may include varicose veins, skin changes, and discomfort or heaviness in the lower limbs. Numbness, shortness of breath, and chest pain are not primary indicators of venous insufficiency.
3. A patient presents with rapid breathing and confusion. If lab results show increased pH and decreased CO₂, what condition might they be experiencing?
- Respiratory acidosis
- Metabolic alkalosis
- Respiratory alkalosis
- Metabolic acidosis
Explanation
Rapid breathing (hyperventilation) causes excessive exhalation of carbon dioxide, leading to decreased CO₂ levels in the blood. This reduction in carbonic acid results in a rise in pH, producing a state known as respiratory alkalosis. Common causes include anxiety, pain, fever, or hypoxemia. The elevated pH leads to cerebral vasoconstriction, which can explain symptoms such as confusion, dizziness, and tingling. Management involves addressing the underlying cause and restoring normal ventilation to correct the acid-base imbalance.
4. This is a sign of hypocalcemia wherein there is twitching of the facial muscles in response to tapping over the area of the facial nerve.
- Kernig's sign
- McBurney's sign
- Trousseau sign
- Chvostek sign
Explanation
Chvostek's sign is a clinical indicator of hypocalcemia. It is elicited by tapping over the facial nerve just anterior to the ear, which triggers twitching of the facial muscles on the same side. This response reflects increased neuromuscular excitability caused by low calcium levels in the blood. Trousseau’s sign is also associated with hypocalcemia but is demonstrated differently, typically by inflating a blood pressure cuff to induce carpal spasm. Kernig’s and McBurney’s signs are related to neurological irritation and appendicitis, respectively, and are not associated with calcium levels.
5. Why is it important to avoid administering potassium via IV push?
- Potassium can only be given orally, not intravenously.
- Administering potassium via IV push can lead to cardiac arrest due to rapid increases in serum potassium levels.
- IV push potassium is a standard practice in emergency situations.
- IV push potassium is safe if monitored closely.
Explanation
Administering potassium via IV push is extremely dangerous because it can cause a rapid rise in serum potassium levels, which may trigger life-threatening cardiac arrhythmias or cardiac arrest. Safe administration requires dilution in IV fluids and controlled infusion rates, allowing the body to tolerate the potassium gradually. Oral potassium or a slow IV infusion is the standard practice for correcting hypokalemia, and IV push should be avoided except under very controlled, emergent protocols with continuous cardiac monitoring.
6. What is one of the key early symptoms of laryngeal cancer that lasts for more than two weeks?
- Shortness of breath
- Chest pain
- Nausea
- Hoarseness
Explanation
Hoarseness lasting more than two weeks is one of the earliest and most common symptoms of laryngeal cancer. The tumor often affects the vocal cords, leading to changes in voice quality. Other symptoms, such as sore throat, ear pain, or difficulty swallowing, may appear as the disease progresses. Early recognition and medical evaluation of persistent hoarseness are critical for prompt diagnosis and treatment.
7. Describe the significance of Chvostek's Sign in relation to calcium levels in the body.
- Chvostek's Sign indicates hypocalcemia, which is a low level of calcium in the blood.
- Chvostek's Sign is unrelated to calcium levels.
- Chvostek's Sign is a normal response to facial nerve stimulation.
- Chvostek's Sign suggests hypercalcemia, indicating high calcium levels.
Explanation
Chvostek's Sign is a clinical indicator of hypocalcemia. It is elicited by tapping the facial nerve just anterior to the ear, causing twitching of the facial muscles on the same side of the face. This occurs because low calcium levels increase the excitability of neuromuscular tissue, leading to involuntary contractions. Recognizing this sign is crucial for identifying calcium imbalances that may result from conditions like hypoparathyroidism or vitamin D deficiency.
8. In a scenario where a patient with a chest tube experiences sudden respiratory distress, which of the following actions should be prioritized using the bedside items?
- Use the occlusive dressing to seal any air leaks around the chest tube.
- Remove the chest tube to assess the situation.
- Administer IV fluids immediately.
- Call for a physician without taking any action.
Explanation
If a patient with a chest tube develops sudden respiratory distress, it may indicate an air leak or accidental chest tube dislodgement, which can rapidly lead to a tension pneumothorax. The immediate priority is to use the occlusive dressing available at the bedside to seal any air leaks around the insertion site. This prevents additional air from entering the pleural space, stabilizing the patient until further medical help arrives. Once the site is secured, the nurse should promptly notify the physician, but initial emergency management must focus on preventing worsening respiratory compromise.
9. All of the following are common signs and symptoms of diabetic ketoacidosis except:
- Ketones in urine.
- Kussmaul respirations.
- Dehydration.
- High HbA1c.
Explanation
Diabetic ketoacidosis (DKA) is an acute, life-threatening complication of diabetes characterized by hyperglycemia, metabolic acidosis, and ketosis. The hallmark signs include dehydration due to osmotic diuresis, Kussmaul respirations (deep, rapid breathing) as a compensatory response to metabolic acidosis, and the presence of ketones in the urine and blood. High HbA1c, on the other hand, is an indicator of long-term blood glucose control, not an acute finding. Elevated HbA1c levels suggest poor glucose management over several months but are not specific to the acute metabolic changes of DKA.
10. What is a common symptom of a urinary tract infection (UTI) in elderly patients?
- Frequent urination.
- Fever and chills.
- Confusion or change in mental status.
- Nausea and vomiting.
Explanation
In elderly patients, a urinary tract infection often presents atypically. Instead of the classic symptoms seen in younger adults—such as dysuria, frequency, or urgency—older adults may primarily exhibit confusion or sudden changes in mental status. This occurs because infections can exacerbate cognitive decline and trigger delirium in older adults due to age-related changes in immune response and metabolism. Early recognition of altered mental status as a sign of infection is critical for timely treatment and prevention of complications like sepsis.
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