Alterations in Gas Exchange: Pathophysiology, Assessment, and Nursing Care

What is the primary function of the respiratory system?

To facilitate gas exchange, providing oxygen to the body and removing carbon dioxide.

What are the components of the upper respiratory tract?

Nasopharynx, oropharynx, laryngopharynx, and the epiglottis.

What physiological changes occur in asthma?

Airway inflammation, edema, and excess mucus lead to bronchospasm.

What is hypoxemia?

A condition where there is insufficient oxygen in the blood.

What is the average pH range of blood?

7.35 - 7.45.

What is the role of bronchodilators in asthma treatment?

To relax and open the airways, improving airflow.

What are common triggers for asthma?

Tobacco smoke, allergens, and certain medications like ASA and NSAIDs.

What is the significance of a high Fowler's position in respiratory care?

It helps facilitate breathing by allowing better lung expansion.

What is status asthmaticus?

A severe asthma attack that can lead to acute ventilatory failure or death.

What are the clinical manifestations of asthma?

Wheezing, coughing, chest tightness, and dyspnea.

What laboratory tests are used to assess asthma?

Pulmonary function tests, peak flow meters, spirometry, ABG, and chest x-rays.

What is the impact of asthma on overall health?

It can lead to increased fatigue, anxiety, depression, and absenteeism from work or school.

What are the nursing interventions for clients with respiratory issues?

Administer oxygen, assess lung sounds, and monitor vital signs.

What medications are commonly used for asthma management?

Short-acting beta-2 agonists (SABAs) and systemic corticosteroids.

What is the relationship between hypercapnia and pulmonary hypertension?

Hypercapnia can lead to vasoconstriction, which increases pulmonary hypertension.

What are the signs of pulmonary edema?

Shortness of breath, crackles in lung sounds, and cyanosis.

What is the role of the nurse in managing asthma?

To monitor the client, educate on self-management, and prevent triggers.

What is the expected outcome of asthma treatment?

Improved respiratory status, increased oxygen saturation, and reduced symptoms.

What are the common symptoms of pneumonia?

Cough, fever, chills, and difficulty breathing.

What is the importance of assessing mental status in respiratory patients?

Changes in mental status can indicate hypoxia or respiratory distress.

What is the nursing process in caring for clients with asthma?

Assessment, analysis, planning, implementation, and evaluation.

What is the impact of aging on asthma?

Increased dyspnea and sensitivity to medications may lead to asthma being overlooked.

What is the significance of peak expiratory flow rate (PEFR) in asthma?

PEFR helps assess the severity of asthma and the effectiveness of treatment.

What are the physiological effects of airway narrowing in asthma?

Interference with airflow leading to increased fatigue and respiratory distress.

What are the potential complications of untreated asthma?

Status asthmaticus, respiratory failure, and increased mortality risk.

What is the role of client education in asthma management?

To empower clients to recognize triggers, manage symptoms, and adhere to treatment plans.

What is the relationship between obesity and obstructive sleep apnea (OSA)?

Obesity increases the risk of OSA due to airway obstruction during sleep.

What indicates a client is experiencing Status Asthmaticus?

A peak expiratory flow rate of less than 50% of the client's personal best.

What should be continuously monitored in a client with Status Asthmaticus?

Respiratory status, peak expiratory flow rates, and respiratory fatigue.

What interventions are included in the planning for Status Asthmaticus?

Monitor serial peak expiratory flow rates, fatigue levels, and mental status alterations.

What is a key nursing action for clients with Status Asthmaticus?

Continuous monitoring and administration of IV fluids, oxygen therapy, and medications.

What is Obstructive Sleep Apnea (OSA)?

A condition characterized by airway obstruction during sleep, often leading to breathing cessation.

What is the greatest risk factor for Obstructive Sleep Apnea?

Obesity.

What are common clinical manifestations of Obstructive Sleep Apnea?

Snoring, breathing cessation for 10 seconds or longer, and daytime sleepiness.

What is the gold standard for testing Obstructive Sleep Apnea?

In-lab polysomnography.

What are some impacts of Obstructive Sleep Apnea on overall health?

Systemic hypertension, cardiac arrhythmias, heart failure, stroke, and increased risk of motor vehicle accidents.

What is the primary nursing consideration for clients with Obstructive Sleep Apnea?

Ensuring adequate oxygenation and client safety.

What is Chronic Obstructive Pulmonary Disease (COPD)?

A progressive lung disease characterized by chronic bronchitis and emphysema.

What is a major risk factor for developing COPD?

Exposure to cigarette smoke.

What are common clinical manifestations of COPD?

Exertional dyspnea, chronic cough with sputum production, wheezing, and chest tightness.

What is the recommended target oxygen saturation for clients with COPD?

95% to 100%.

What classes of medications are used as Beta2 Agonists?

Short-acting (e.g., Albuterol) and long-acting (e.g., Formoterol, Salmeterol).

What is the mechanism of action for Beta2 Agonists?

Activates beta 2 receptors in bronchial smooth muscle, leading to bronchodilation.

What are common side effects of Beta2 Agonists?

Tachycardia, angina, and tremors.

What are Muscarinic Antagonists used for?

To prevent bronchoconstriction and treat bronchospasm.

What is a short-acting Muscarinic Antagonist?

Ipratropium.

What is a long-acting Muscarinic Antagonist?

Tiotropium.

What are common side effects of Muscarinic Antagonists?

Anticholinergic effects such as dry mouth and hoarseness.

What should clients be educated about when using inhaled medications?

To rise mouth after administration and wait 5 minutes between inhaled meds.

What is the role of the nurse in managing clients with respiratory conditions?

To assess respiratory status, implement interventions, and educate clients on self-management.

What is the mechanism of action of corticosteroids?

They prevent inflammation and suppress airway mucus production by binding to Beta 2 receptors.

What are corticosteroids used for?

They are indicated for chronic or severe asthma.

What are common side effects of corticosteroids?

Trembling, headaches, and dry mouth.

What client education should be provided for corticosteroid use?

Use on a regular fixed schedule and do not use for acute asthma episodes.

What is the mechanism of action of anti-IgE agents?

They block IgE which can trigger allergic reactions and inflammation.

What are anti-IgE agents indicated for?

They are used for allergies and uncontrolled asthma.

What are common side effects of anti-IgE agents?

Injection-site reactions, upper respiratory infections, and headaches.

What client education should be provided for anti-IgE agents?

Improvement may take up to 16 weeks.

What is the mechanism of action of methylxanthines?

They relax the bronchial smooth muscle.

What are methylxanthines used for?

Oral Theophylline is used for long-term control of chronic asthma or COPD.

What are common side effects of methylxanthines?

GI distress and restlessness from mild toxicity.

What client education should be provided for methylxanthines?

Take as prescribed and swallow pills whole.

What are macrolides used for?

They are indicated for respiratory infections or STDs.

What is the mechanism of action of PDE-4 inhibitors?

They block the Phosphodiesterase-4 enzyme, stopping the breakdown of cAMP in immune and respiratory cells.

What are PDE-4 inhibitors indicated for?

They are used to treat inflammatory conditions.

What are common side effects of PDE-4 inhibitors?

Gastrointestinal disturbances, headache, and weight loss.

What client education should be provided for PDE-4 inhibitors?

Monitor for weight and mood changes, pregnancy, or GI symptoms.

What is the mechanism of action of mast cell stabilizers?

They block the release of histamine and other chemical mediators from mast cells.

What are mast cell stabilizers used for?

They are indicated for asthma and allergic reactions.

What are common side effects of mast cell stabilizers?

Abdominal issues and throat irritation.

What client education should be provided for mast cell stabilizers?

Prophylactic use, proper administration techniques, and patience with therapeutic onset.

What is the mechanism of action of leukotriene modifiers?

They suppress leukotrienes which cause inflammation in the airway muscles and secrete mucus.

What are leukotriene modifiers indicated for?

Long-term therapy for asthma and prevention of exercise-induced bronchospasm.

What are common side effects of leukotriene modifiers?

Depression, suicidal ideation, and liver injury.

What client education should be provided for leukotriene modifiers?

Take before or after meals and montelukast at bedtime or 2 hours before exercise.

What is pneumonia?

A bacterial or viral lung infection.

What are common clinical manifestations of pneumonia?

Cough, dyspnea, pleuritic chest pain, and adventitious lung sounds.

What diagnostic test is commonly used for pneumonia?

Chest x-ray.

What are the nursing considerations for pneumonia management?

Encourage early mobilization, adherence to treatments, and recognize symptoms.

What is pulmonary edema?

A life-threatening buildup of fluid in the lungs.

What are the common manifestations of pulmonary edema?

Excessive shortness of breath, anxiety, confusion, and hypertension with jugular vein distension.

What is the nursing process for managing pulmonary edema?

Assess respiratory status, analyze data for distress, prioritize airway and circulation, and implement O2 therapy.