A healthcare professional is educating a patient about asthma. The professional states that good control is necessary due to which pathophysiologic process?
Norepinephrine causes bronchial smooth muscle contraction and mucus secretion but it also causes high blood pressure
Uncontrolled inflammation leads to increased bronchial hyperresponsiveness and eventual scarring
Immunoglobulin G causes smooth muscle contraction which will eventually weaken the respiratory muscles
The release of epinephrine leads to development of cardiac dysrhythmias.
The Correct Answer is B
A. Norepinephrine causes bronchial smooth muscle contraction and mucus secretion but it also causes high blood pressure: This statement is misleading in the context of asthma. Norepinephrine primarily acts on alpha and beta receptors, influencing blood pressure and bronchodilation but is not the main mediator in asthma pathophysiology. The focus should be on inflammation and airway responsiveness.
B. Uncontrolled inflammation leads to increased bronchial hyperresponsiveness and eventual scarring: This statement accurately describes the pathophysiologic process in asthma. Persistent inflammation in asthma can cause increased bronchial hyperresponsiveness, leading to airway narrowing and potential long-term remodeling and scarring of the airways if not controlled. Effective management is essential to prevent these adverse outcomes.
C. Immunoglobulin G causes smooth muscle contraction which will eventually weaken the respiratory muscles: Immunoglobulin E (IgE) is primarily involved in allergic reactions and asthma, and it does not directly cause smooth muscle contraction that weakens respiratory muscles.
D. The release of epinephrine leads to development of cardiac dysrhythmias: While epinephrine can have cardiovascular effects, including increased heart rate and potential for dysrhythmias, this is not directly relevant to the pathophysiology of asthma. The focus in asthma management is on controlling airway inflammation and bronchoconstriction rather than on cardiac issues.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Assist with a chest tube insertion: A gunshot wound to the chest with a one-way valve pleural rupture indicates a tension pneumothorax, a life-threatening condition. Air enters the pleural space with each breath but cannot escape, leading to increased intrathoracic pressure, lung collapse, and mediastinal shift, which can compromise venous return and cardiac output. Immediate chest tube insertion or needle decompression is necessary to relieve pressure and restore normal lung function.
B. Give the patient low-flow oxygen: Oxygen therapy may help improve oxygenation, but it does not address the underlying issue of trapped air causing intrathoracic pressure buildup. Without intervention to release the trapped air, respiratory distress and cardiovascular collapse can occur.
C. Assess for clubbing of fingernails: Clubbing is a sign of chronic hypoxia seen in long-term respiratory diseases but is not relevant in the acute management of a tension pneumothorax. The priority is to relieve the trapped air and restore normal lung expansion.
D. Draw arterial gases: While arterial blood gases can help assess oxygenation and ventilation status, they do not treat the underlying tension pneumothorax. Immediate decompression is required before diagnostic tests to prevent rapid deterioration and potential cardiac arrest.
Correct Answer is D
Explanation
A. Deep vein thrombosis: Deep vein thrombosis (DVT) typically presents with swelling, pain, and tenderness in a specific area of the leg. It does not specifically cause pain that resolves with rest after walking, making it less likely in Mr. Jones's case.
B. Valvular regurgitation: Valvular regurgitation refers to the backward flow of blood due to improper closure of heart valves. This condition primarily affects cardiac function and is not associated with pain in the legs that resolves with rest, which does not correlate with Mr. Jones's symptoms.
C. Varicose veins: Varicose veins can cause discomfort, swelling, and aching in the legs but are not typically characterized by pain that is specifically triggered by walking and resolves with rest. The symptoms of varicose veins usually occur with prolonged standing or sitting rather than exertion.
D. Intermittent claudication: Intermittent claudication is a common symptom of peripheral artery disease (PAD), characterized by muscle pain or cramping in the legs during physical activity, such as walking, that resolves with rest. Mr. Jones's description of pain that occurs while walking and subsides upon stopping aligns with this condition, making it the most appropriate explanation for his symptoms.
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