NUR 507 midterm exam 4 Chamberlain University
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Free NUR 507 midterm exam 4 Chamberlain University Questions
Which of the following individuals is most at-risk for developing prerenal failure?
- An elderly individual with heart failure
- A healthy young adult with normal fluid intake
- A pregnant woman in the third trimester
- A marathon runner in peak physical condition
Explanation
Correct Answer: A) An elderly individual with heart failure
Prerenal failure results from any condition that significantly reduces renal perfusion pressure, causing the kidneys to receive insufficient blood flow to maintain filtration. Heart failure is a leading cause of prerenal acute kidney injury because the failing heart produces reduced cardiac output, leading to decreased arterial blood pressure and renal perfusion. In response, the kidneys activate the renin-angiotensin-aldosterone system and retain sodium and water, but if perfusion remains critically low, glomerular filtration rate drops and prerenal azotemia develops. Elderly patients with heart failure are particularly vulnerable due to age-related declines in baseline renal reserve and the frequent use of diuretics and ACE inhibitors that further reduce renal perfusion.
In most children 4 years and older, which of the following treatment approaches is effective in preventing asthma exacerbations and improving symptoms?
- Albuterol nebulizer treatments as needed
- A single short-acting beta-agonist
- A single inhaled corticosteroid
- A single maintenance reliever approach (SMART) with an inhaled corticosteroid and long-acting beta-agonist
Explanation
Correct Answer: D) A single maintenance reliever approach (SMART) with an inhaled corticosteroid and long-acting beta-agonist
The SMART approach — using a combination inhaler containing an inhaled corticosteroid (ICS) and a long-acting beta-agonist (LABA) such as budesonide/formoterol for both daily maintenance and as-needed rescue — has been shown to be highly effective in reducing asthma exacerbations and improving symptom control in children 4 years and older. This strategy reduces the overall corticosteroid burden while providing superior exacerbation prevention compared to using separate maintenance and rescue inhalers.
Albuterol nebulizer treatments as needed only address acute bronchospasm and do not provide anti-inflammatory control to prevent future exacerbations. A single short-acting beta-agonist alone is insufficient for persistent asthma management as it provides no maintenance anti-inflammatory benefit. A single inhaled corticosteroid addresses inflammation but lacks the bronchodilator component needed for both maintenance and rescue, making the combined SMART approach more comprehensive and effective.
The NP is providing education to a client newly diagnosed with asthma, according to the National Asthma Education and Prevention Program (NAEPP). What teaching recommendation is consistent with the NAEPP guidelines for asthma management?
- Monitoring peak flow measurements only during asthma exacerbations
- Use of long-acting beta-agonists (LABAs) as the primary rescue medication
- Encouraging smoking as a stress-relief strategy for asthma patients
- Providing written asthma action plans to guide self-management
Explanation
Correct Answer: D) Providing written asthma action plans to guide self-management
The NAEPP strongly recommends that every asthma patient receive a written asthma action plan as a cornerstone of self-management education. These plans provide personalized, step-by-step instructions based on symptom severity and peak flow measurements, guiding patients on when to use rescue medications, when to step up controller therapy, and when to seek emergency care. Written action plans have been shown to reduce asthma-related hospitalizations, emergency visits, and missed school or workdays by empowering patients to respond appropriately to worsening symptoms before they become life-threatening.
A patient is classified as Stage A for heart failure according to the American College of Cardiology (ACC)/American Heart Association (AHA) staging system. What intervention is most appropriate for managing Stage A heart failure?
- Implement lifestyle modifications and risk factor control
- Administer diuretics to relieve symptoms
- Perform coronary angiography for revascularization
- Initiate beta-blocker therapy
Explanation
Correct Answer: A) Implement lifestyle modifications and risk factor control
Stage A heart failure represents the pre-heart failure stage — patients are at high risk due to conditions such as hypertension, diabetes, or obesity, but have no structural heart disease and no symptoms. The most appropriate intervention at this stage is aggressive management of risk factors through lifestyle modifications, including dietary changes, regular physical activity, smoking cessation, blood pressure control, and glycemic management, to prevent progression to structural heart disease.
Diuretics are used to relieve fluid overload symptoms in Stage C or D heart failure and are not appropriate at Stage A where no symptoms or structural changes exist. Coronary angiography for revascularization is reserved for patients with established coronary artery disease and specific indications. Beta-blocker therapy is initiated in patients with structural heart disease and reduced ejection fraction, typically Stage B or beyond.
A patient with chronic respiratory symptoms presents with chronic cough, sputum production, and dyspnea. Further evaluation indicates airflow limitation on pulmonary function tests. Which of the following features is more indicative of chronic bronchitis rather than emphysema?
- Hyperinflation of the lungs
- Increased airway inflammation and mucus production
- Reduced elasticity of lung tissue
- Destruction of alveolar walls
Explanation
Correct Answer: B) Increased airway inflammation and mucus production
Chronic bronchitis is characterized by persistent airway inflammation and excessive mucus production due to hypertrophy of the bronchial mucous glands. This leads to a chronic productive cough and airway narrowing. These features are specific to chronic bronchitis and distinguish it from emphysema, which involves structural lung damage rather than airway hypersecretion.
Hyperinflation of the lungs results from air trapping, which is more characteristic of emphysema. Reduced elasticity of lung tissue and destruction of alveolar walls are hallmark features of emphysema, where the breakdown of the alveolar walls leads to loss of elastic recoil and permanently enlarged air spaces.
Emphysema can be categorized into different variations based on the distribution of lung damage. Which type of emphysema is characterized by damage primarily affecting the upper lobes of the lungs?
- Paraseptal emphysema
- Panacinar emphysema
- Irregular emphysema
- Centriacinar emphysema
Explanation
Correct Answer: D) Centriacinar emphysema
Centriacinar emphysema, also known as centrilobular emphysema, is the most common type and is strongly associated with cigarette smoking. It predominantly affects the central portion of the acinus — specifically the respiratory bronchioles — and characteristically involves the upper lobes of the lungs where inhaled toxins tend to deposit more heavily due to regional ventilation patterns.
Paraseptal emphysema affects the distal acinus along the lung periphery and septa, and is associated with spontaneous pneumothorax in young adults. Panacinar emphysema involves the entire acinus uniformly and is classically associated with alpha-1 antitrypsin deficiency, predominantly affecting the lower lobes. Irregular emphysema is associated with scarring and has no consistent lobar distribution.
In the pathophysiology of a urinary tract infection (UTI), what is the primary mechanism by which bacteria typically gain access to the urinary system?
- Direct extension from the bladder to the kidneys
- Hematogenous spread from distant infections
- Ascending migration from the urethra
- Lymphatic spread from adjacent structures
Explanation
Correct Answer: C) Ascending migration from the urethra
The overwhelming majority of UTIs are caused by ascending migration of bacteria, most commonly Escherichia coli from the perineal region, entering through the urethral meatus and migrating upward into the bladder. Women are disproportionately affected due to their shorter urethra, which provides a shorter distance for bacteria to travel. If untreated, the infection can continue ascending through the ureters to the renal pelvis, causing pyelonephritis. Hematogenous spread is rare and typically occurs only in severely immunocompromised patients.
What is the primary role of angiotensin-converting enzyme inhibitors (ACEIs) in the management of chronic kidney disease (CKD)?
- Slowing the progression of kidney damage
- Providing symptomatic relief of kidney pain
- Enhancing diuresis and kidney damage
- Reducing blood pressure only
Explanation
Correct Answer: A) Slowing the progression of kidney damage
ACEIs play a nephroprotective role in CKD that extends beyond simply lowering blood pressure. By inhibiting angiotensin II, ACEIs cause preferential dilation of the efferent arteriole, which reduces intraglomerular pressure and decreases the mechanical stress on the glomerular filtration barrier. This directly reduces proteinuria and slows the progressive scarring and fibrosis of the kidney. These effects are particularly beneficial in diabetic nephropathy and other proteinuric kidney diseases, making ACEIs a cornerstone of CKD management regardless of hypertension status.
Kidney pain is not a typical feature of CKD, and ACEIs have no analgesic role. ACEIs do not enhance diuresis, and the suggestion that they worsen kidney damage is incorrect — quite the opposite, they are renoprotective. While blood pressure reduction is one effect, it is not the sole or primary purpose of ACEI use in CKD.
A patient with a history of alcohol abuse presents with weakness, fatigue, and difficulty concentrating. Laboratory tests show an elevated mean corpuscular volume (MCV) and low vitamin B-12 levels. What type of anemia is likely present?
- Microcytic anemia
- Normocytic anemia
- Macrocytic anemia
- Hemolytic anemia
Explanation
Correct Answer: C) Macrocytic anemia
An elevated MCV indicates that red blood cells are abnormally large, which is the defining characteristic of macrocytic anemia. In this patient, alcohol abuse combined with low vitamin B-12 levels points specifically to megaloblastic macrocytic anemia. Vitamin B-12 is essential for DNA synthesis during red blood cell maturation in the bone marrow. Its deficiency causes impaired nuclear division while cytoplasmic development continues normally, resulting in abnormally large, immature red blood cells called megaloblasts that are released into circulation as macrocytes. Alcohol further compounds this by directly impairing folate absorption and bone marrow function, exacerbating the anemia.
Which of the following symptoms are seen in Stage 1 chronic kidney disease?
- Mild hypertension
- Usually no symptoms are seen at this stage
- Hyperphosphatemia
- Anemia
Explanation
Correct Answer: B) Usually no symptoms are seen at this stage
Stage 1 CKD is defined by a GFR of 90 mL/min or greater with evidence of kidney damage such as proteinuria or hematuria. At this early stage, the remaining nephrons compensate effectively for the loss of function, maintaining near-normal metabolic and excretory activities. As a result, patients are typically entirely asymptomatic and the condition is most often detected incidentally through routine laboratory screening. Manifestations such as anemia, hyperphosphatemia, and significant hypertension typically emerge in later stages as nephron loss becomes substantial and compensatory mechanisms are overwhelmed, usually in Stages 3 through 5.
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