🔷 Emphysema destroys alveolar walls, reducing elastic recoil and impairing normal air movement.

🔷 Loss of alveolar support causes small airways and bronchioles to collapse or narrow, especially during exhalation.

🔷 This traps air in the lungs, leading to hyperinflation and difficulty breathing out.

🔷 Impaired gas exchange occurs because the surface area for oxygen and carbon dioxide diffusion is reduced.

🔷 Clients commonly develop dyspnea, prolonged expiration, and decreased oxygenation as the disease progresses.

Surfactant is lost preventing complete exhalation

🔷Surfactant loss is not the main problem in emphysema.

🔷The major issue is loss of elastic recoil and airway collapse during expiration.

Surfactant is lost causing the alveoli to collapse

🔷Alveolar collapse from surfactant deficiency is more associated with atelectasis or neonatal respiratory distress.

🔷Emphysema causes alveolar destruction and air trapping, not primarily surfactant loss.

Blood flow is impaired causing the alveoli to collapse

🔷Impaired blood flow does not directly cause alveolar collapse in emphysema.

🔷The primary mechanism is structural destruction of alveoli and loss of airway support.

🔶 Pneumonia is a lower respiratory infection that causes inflammation of the lung tissue.

🔶 The alveoli become filled with fluid, pus, and inflammatory cells, which interferes with gas exchange.

🔶 This alveolar filling reduces oxygen movement into the bloodstream and can cause low oxygen saturation.

🔶 Common symptoms include cough, fever, chills, shortness of breath, and abnormal lung sounds.

🔶 Treatment depends on the cause, but bacterial pneumonia often requires antibiotics and supportive respiratory care.

Cystic fibrosis

🔶Cystic fibrosis is a genetic disorder that causes thick secretions in the lungs and digestive tract.

🔶 It increases the risk for respiratory infections but is not itself the infection that fills alveoli with pus.

Emphysema

🔶Emphysema is a chronic lung disease involving destruction of alveoli.

🔶It does not primarily cause alveoli to fill with pus or fluid.

Asthma

🔶Asthma is a chronic inflammatory airway disorder causing bronchoconstriction and mucus production.

🔶It affects airflow through the bronchi rather than causing infected fluid-filled alveoli.

💎 Severe COPD can cause chronic low oxygen levels, which leads to constriction of pulmonary blood vessels.

💎 This increases pressure in the pulmonary circulation and causes pulmonary hypertension.

💎 The right ventricle must pump harder against this increased lung pressure.

💎 Over time, the right side of the heart can enlarge, weaken, and fail, causing cor pulmonale.

💎 Findings may include peripheral edema, jugular venous distention, hepatomegaly, and worsening activity intolerance.

Hypotension

💎Hypotension is not the expected long-term complication of pulmonary hypertension from COPD.

💎The main concern is increased workload on the right ventricle.

Left-sided heart failure

💎Left-sided heart failure is commonly related to systemic hypertension, coronary artery disease, or left ventricular dysfunction.

💎COPD-related pulmonary hypertension primarily strains the right side of the heart.

Chronic kidney disease

💎Chronic kidney disease is not the classic direct complication of COPD-related pulmonary hypertension.

💎The major risk is right ventricular failure due to increased pulmonary vascular resistance.

🟢 Atelectasis is the collapse of alveoli, often occurring after surgery and general anesthesia.

🟢 Long surgical procedures, shallow breathing, pain, immobility, and retained secretions increase the risk.

🟢 Collapsed alveoli reduce ventilation and cause dropping oxygen saturation.

🟢 The client may develop tachypnea, shallow respirations, decreased breath sounds, and dyspnea.

🟢 Nursing care focuses on deep breathing, coughing, incentive spirometry, early ambulation, and adequate pain control.

Flail chest

🟢Flail chest occurs when multiple rib fractures cause a segment of the chest wall to move paradoxically.

🟢It is usually related to trauma, not prolonged anesthesia.

Pneumoconiosis

🟢Pneumoconiosis is caused by chronic inhalation of dust or occupational particles.

🟢It does not develop suddenly after surgery.

Acute bronchitis

🟢Acute bronchitis is inflammation of the bronchi, usually caused by infection or irritation.

🟢It does not best explain immediate postoperative low oxygen saturation with shallow breathing.

🔵 Asthma causes reversible airway inflammation, bronchoconstriction, and increased mucus production.

🔵 Wheezing, prolonged expiration, shortness of breath, coughing, and low oxygen saturation are classic findings.

🔵 During an asthma episode, narrowed airways make it especially difficult to move air out of the lungs.

🔵 The prolonged expiratory phase reflects air trapping caused by bronchospasm.

🔵 Treatment often includes rapid bronchodilation with a short-acting beta₂-agonist and control of triggers.

Cystic fibrosis

🔵Cystic fibrosis causes thick secretions and recurrent lung infections, usually beginning earlier in life.

🔵It does not most directly match sudden wheezing with prolonged expiration.

Pulmonary embolism

🔵Pulmonary embolism can cause sudden dyspnea, chest pain, tachycardia, and low oxygen saturation.

🔵Wheezing with prolonged expiration is more typical of obstructive airway disease.

Pneumonia

🔵Pneumonia commonly causes fever, productive cough, crackles, and alveolar consolidation.

🔵Prolonged expiration and bilateral wheezing point more strongly to asthma.

🟣 Pneumoconiosis occurs after inhalation of harmful dusts or particles that trigger chronic lung inflammation.

🟣 Persistent inflammation leads to fibrosis and scarring of lung tissue.

🟣 Scarred lungs become stiff and cannot expand effectively during inhalation.

🟣 Poor lung expansion reduces oxygen intake, especially during activity when oxygen demand increases.

🟣 This explains dyspnea, reduced exercise tolerance, dry cough, and progressive respiratory limitation.

Infections lead to scarred lung tissue resulting in poor expansion

🟣Pneumoconiosis is caused by inhaled occupational particles, not primarily infections.

🟣Scarring results from chronic inflammatory response to dust exposure.

Inflammation reduces surfactant so the lungs have reduced recoil

🟣The major issue is fibrosis and stiff lung tissue, not surfactant deficiency.

🟣Reduced recoil is more associated with obstructive diseases such as emphysema.

Infections leads to scarred lung tissue that are not able to fully recoil

🟣Infection is not the main cause of pneumoconiosis.

🟣The problem is inhaled particle exposure causing inflammation and fibrosis that limits expansion.

🟡 A middle ear infection usually occurs when the eustachian tube becomes inflamed, swollen, or blocked.

🟡 The eustachian tube normally drains fluid and equalizes pressure between the middle ear and throat.

🟡 When blocked, fluid collects behind the tympanic membrane and creates a place for organisms to grow.

🟡 This leads to pain, pressure, fever, and possible hearing changes.

🟡 Children are especially prone because their eustachian tubes are shorter, narrower, and more horizontal.

Swimming in water that has pathogens such as bacteria

🟡Swimming-related infection is more associated with otitis externa, also called swimmer’s ear.

🟡Middle ear infection usually starts from eustachian tube dysfunction.

Bacteria entering the ear through a perforated tympanic membrane

🟡A perforated tympanic membrane can allow organisms to enter, but it is not the most common cause.

🟡Middle ear infections usually develop behind the eardrum due to blocked drainage.

Irritation to the outer canal of the ear

🟡Outer ear canal irritation causes otitis externa.

🟡It does not describe the usual mechanism of a middle ear infection.

🟠 COVID-19 can affect the lower respiratory tract by infecting epithelial cells in the alveolar wall.

🟠 Damage to alveolar cells interferes with oxygen exchange across the respiratory membrane.

🟠 Inflammation can cause fluid leakage, impaired diffusion, and reduced oxygen saturation.

🟠 Severe cases may progress to viral pneumonia or acute respiratory distress syndrome.

🟠 This explains why some clients develop shortness of breath, hypoxemia, and diffuse lung involvement.

The lining of the bronchial tubes

🟠COVID can involve the airways, but severe respiratory disease is strongly linked to alveolar involvement.

🟠The question focuses on the key lower respiratory structure affected.

The upper airway including the larynx

🟠COVID may cause upper respiratory symptoms such as sore throat or congestion.

🟠The major respiratory complication involves the alveoli and impaired gas exchange.

The endothelial cells of the pulmonary artery

🟠COVID can affect blood vessels and clotting, but this is not the best basic respiratory target described here.

🟠The classic respiratory damage involves alveolar epithelial cells.

🔴 Tension pneumothorax occurs when air rapidly accumulates in the pleural space and cannot escape.

🔴 Increasing pressure collapses the affected lung and shifts mediastinal structures away from the injured side.

🔴 This can cause tracheal deviation, severe respiratory distress, decreased breath sounds, and hypoxia.

🔴 Tachycardia occurs as the body attempts to compensate for poor oxygenation and reduced venous return.

🔴 This is a life-threatening emergency requiring immediate decompression.

Rapid breathing and bradycardia

🔴Rapid breathing can occur, but bradycardia is not the expected early compensatory response.

🔴Tachycardia is more typical due to hypoxia and shock physiology.

Muffled heart sounds and cyanosis

🔴Cyanosis can occur late, but muffled heart sounds are more associated with cardiac tamponade.

🔴Tension pneumothorax is more strongly linked with tracheal deviation and unilateral decreased breath sounds.

Hypertension and a reduced heart rate

🔴Tension pneumothorax usually leads to obstructive shock and may cause hypotension as venous return decreases.

🔴A reduced heart rate is not the typical finding.

⚫ Acute tubular necrosis is an intrarenal cause of acute kidney injury involving damage to renal tubular epithelial cells.

⚫ When these cells die, they slough off into the tubules and obstruct urine flow within the nephron.

⚫ Tubular obstruction increases pressure and contributes to tissue edema and impaired filtration.

⚫ The condition is commonly caused by prolonged ischemia, nephrotoxic medications, contrast dye, or severe sepsis.

⚫ Kidney function declines because damaged tubules cannot properly reabsorb, secrete, or concentrate urine.

Urine cannot drain from the kidney causing edema and damage in the kidney

⚫This describes a postrenal obstruction, such as stones or enlarged prostate blocking urine flow.

⚫Acute tubular necrosis is an intrarenal problem involving tubular cell injury.

There isn't enough blood flow to the kidney so cells will become necrotic

⚫Poor blood flow can cause acute tubular necrosis, but this statement describes the cause rather than the pathophysiology.

⚫The key process is tubular epithelial cell death and obstruction.

The glomerulus becomes inflamed resulting in protein spilling into the urine

⚫This describes glomerulonephritis, not acute tubular necrosis.

⚫ATN primarily affects the renal tubules rather than the glomerulus.