LPN exams respiratory practice questions

Correct answer:

Respiratory distress syndrome (RDS) in premature infants arises from immature lungs lacking sufficient surfactant, a phospholipid mixture from type II alveolar cells that reduces alveolar surface tension. Limited surfactant synthesis increases tension, causing alveolar collapse (atelectasis) and low lung compliance lungs become stiff, requiring higher pressures for ventilation, all true features. Positive pressure respirators are standard to maintain oxygenation and prevent collapse, also true. However, the statement about lung compliance being low is universally true in RDS, not the exception. A potential misinterpretation might expect a false statement like alveoli overexpand and burst,' but among these, all align with RDS pathophysiology. If NOT true' implies a trick, low compliance is still consistent, suggesting a contextual error yet, per options, none stand out as false. Assuming standard RDS traits, all are true, but compliance's consistency might confuse; still, it's not the exception intended, requiring re-evaluation of intent. Here, all fit RDS, making C a default choice if misworded.

Correct answer:

Respiratory distress syndrome (RDS) in premature infants arises from immature lungs lacking sufficient surfactant, a phospholipid mixture from type II alveolar cells that reduces alveolar surface tension. Limited surfactant synthesis increases tension, causing alveolar collapse (atelectasis) and low lung compliance lungs become stiff, requiring higher pressures for ventilation, all true features. Positive pressure respirators are standard to maintain oxygenation and prevent collapse, also true. However, the statement about lung compliance being low is universally true in RDS, not the exception. A potential misinterpretation might expect a false statement like alveoli overexpand and burst,' but among these, all align with RDS pathophysiology. If NOT true' implies a trick, low compliance is still consistent, suggesting a contextual error yet, per options, none stand out as false. Assuming standard RDS traits, all are true, but compliance's consistency might confuse; still, it's not the exception intended, requiring re-evaluation of intent. Here, all fit RDS, making C a default choice if misworded.

Correct answer:

Pneumonia secondary to influenza often leads to ineffective breathing patterns due to lung inflammation, mucus buildup, and impaired gas exchange, making it a primary nursing diagnosis. The client may experience shortness of breath or rapid, shallow breathing as the body struggles to oxygenate properly, a direct result of flu-related respiratory complications. Disturbed sleep pattern is plausible, as coughing and discomfort disrupt rest, supporting recovery challenges. Self-care deficit: bathing could apply if fatigue or weakness prevents personal hygiene, common in severe illness. Chronic pain, however, implies a long-term condition unrelated to acute pneumonia or flu, which typically cause temporary discomfort like myalgia or pleuritic pain. The nurse prioritizes ineffective breathing pattern because it addresses the life-threatening respiratory impact of pneumonia, requiring interventions like oxygen therapy or positioning. This diagnosis aligns with the clinical presentation of flu complications, guiding care to stabilize the client's respiratory status and prevent further deterioration.

Correct answer:

Pneumonia secondary to influenza often leads to ineffective breathing patterns due to lung inflammation, mucus buildup, and impaired gas exchange, making it a primary nursing diagnosis. The client may experience shortness of breath or rapid, shallow breathing as the body struggles to oxygenate properly, a direct result of flu-related respiratory complications. Disturbed sleep pattern is plausible, as coughing and discomfort disrupt rest, supporting recovery challenges. Self-care deficit: bathing could apply if fatigue or weakness prevents personal hygiene, common in severe illness. Chronic pain, however, implies a long-term condition unrelated to acute pneumonia or flu, which typically cause temporary discomfort like myalgia or pleuritic pain. The nurse prioritizes ineffective breathing pattern because it addresses the life-threatening respiratory impact of pneumonia, requiring interventions like oxygen therapy or positioning. This diagnosis aligns with the clinical presentation of flu complications, guiding care to stabilize the client's respiratory status and prevent further deterioration.

Correct answer:

The correct answer is B, taking a full set of vital signs, as it is crucial in assessing the client's overall condition and detecting any signs of deterioration. Vital signs include blood pressure, heart rate, respiratory rate, and temperature, which provide valuable information about the client's cardiovascular and respiratory status. In this scenario, absent breath sounds indicate potential respiratory compromise, making it essential to monitor vital signs for any signs of respiratory distress or instability. Choice A is incorrect because calling the Rapid Response Team is important, but assessing the client's vital signs should take priority to provide immediate information on the client's condition. Choice C, obtaining pulse oximetry reading, is also important but may not provide a comprehensive assessment of the client's overall condition compared to a full set of vital signs. Choice D, asking about hemoptysis, is not the most urgent action to take in this situation as assessing vital signs would provide more immediate and critical information for the client's management.

Correct answer:

Asthma is an obstructive airway disease characterized by reversible bronchoconstriction, inflammation, and mucus production. During an asthmatic attack, narrowed airways increase resistance, particularly during expiration, when dynamic compression exacerbates airflow limitation, producing wheezing most prominent on expiration, not inspiration. The work of breathing increases significantly as patients struggle against this resistance and reduced airflow, requiring greater effort from respiratory muscles like the diaphragm and intercostals to maintain ventilation. Bronchodilators (e.g., albuterol) are the mainstay of treatment, relaxing bronchial smooth muscle to relieve constriction, so they are not contraindicated. Forced expiratory volume in 1 second (FEV1) decreases during an attack due to obstruction, not increases, as airflow is impeded. The increased work of breathing is a consistent expectation, reflecting the physiological burden of overcoming narrowed airways and trapped air, distinguishing it from the incorrect options that misalign with asthma's acute presentation.

Correct answer:

Asthma is an obstructive airway disease characterized by reversible bronchoconstriction, inflammation, and mucus production. During an asthmatic attack, narrowed airways increase resistance, particularly during expiration, when dynamic compression exacerbates airflow limitation, producing wheezing most prominent on expiration, not inspiration. The work of breathing increases significantly as patients struggle against this resistance and reduced airflow, requiring greater effort from respiratory muscles like the diaphragm and intercostals to maintain ventilation. Bronchodilators (e.g., albuterol) are the mainstay of treatment, relaxing bronchial smooth muscle to relieve constriction, so they are not contraindicated. Forced expiratory volume in 1 second (FEV1) decreases during an attack due to obstruction, not increases, as airflow is impeded. The increased work of breathing is a consistent expectation, reflecting the physiological burden of overcoming narrowed airways and trapped air, distinguishing it from the incorrect options that misalign with asthma's acute presentation.

Correct answer:

The correct answer is B: Excess alcohol intake. Alcohol consumption can contribute to the development of hypertension by increasing blood pressure and damaging the arteries over time. Excessive alcohol intake can also lead to weight gain and other unhealthy lifestyle choices that can exacerbate hypertension. A: A low-calcium diet is not a modifiable risk factor for the development of hypertension. Calcium intake may have some impact on blood pressure regulation, but it is not a primary modifiable risk factor for hypertension. C: A family history of hypertension is a non-modifiable risk factor as genetics play a significant role in the development of hypertension. While having a family history of hypertension increases one's risk, it is not something that can be changed or modified. D: Consumption of a high-protein diet is not a primary modifiable risk factor for hypertension. While diet plays a role in hypertension, high protein intake alone is not a significant risk factor compared to factors such as excessive alcohol consumption, high sodium intake, and obesity

Correct answer:

Residual volume (RV) is the air remaining in the lungs after a maximal expiration, preventing complete collapse and maintaining alveolar stability. It's not just after tidal expiration (that's FRC), so that statement is imprecise. In COPD, an obstructive disease, air trapping increases RV due to impaired expiration from narrowed airways or loss of elastic recoil, not decreases it. In pulmonary fibrosis, a restrictive disease, RV decreases because stiff lungs limit all volumes, including the amount left after maximal effort. However, RV remains relatively constant throughout a healthy person's life, unaffected by aging alone in the absence of disease, as lung elasticity and structure don't drastically alter RV without pathology. While lung volumes like vital capacity may shift with age, RV's stability reflects its role as a fixed baseline, measured indirectly (e.g., helium dilution), and isn't subject to significant physiological variation over time in health. Thus, its consistency across a lifetime is the correct statement, distinguishing it from disease-specific changes.

Correct answer:

The volume of air entering the lung during inspiration is driven by Boyle's law: lung volume increases as intrapulmonary pressure decreases relative to atmospheric pressure. This pressure gradient is created by the diaphragm and intercostal muscles contracting, expanding the thoracic cavity, and dropping intrapulmonary pressure (e.g., from 760 mmHg to 758 mmHg), allowing air to flow in. Increasing this gradient via greater muscle contraction or thoracic expansion directly increases inspired volume, making it the primary factor. Increase in action potential' is vague but likely refers to neural impulses to respiratory muscles; while more frequent or intense action potentials could enhance muscle effort, this is secondary to the mechanical pressure gradient they produce. Combining both doesn't elevate action potentials to equal status, as pressure is the direct mechanism. Decreasing the gradient reduces airflow, opposing the goal. Thus, the pressure gradient is the most critical factor, as it's the physical driver of ventilation, rooted in respiratory mechanics.