COPD, ASTHMA, CF
OXYGEN TOXICITY
Definition: Potential overdose of oxygen, generally when concentrations exceed 50% for prolonged periods.
Symptoms:
Substernal discomfort
Paresthesias
Dyspnea (shortness of breath)
Restlessness
Fatigue
Malaise
Progressive respiratory difficulty
Refractory hypoxemia
Alveolar atelectasis and infiltrates identified via X-ray.
Prevention:
Always utilize the lowest effective concentrations of oxygen.
OXYGEN ADMINISTRATION DEVICES
Types:
Cylinder: Portable tanks containing oxygen.
Piped-in: Fixed supply systems in healthcare settings.
Concentrator: Devices that extract oxygen from ambient air.
Classification: Devices are categorized into low flow and high flow.
Devices:
Nasal cannula
High flow nasal cannula
Masks: Simple face mask, Venturi mask, Partial rebreather, Non-rebreather mask
CPAP (Continuous Positive Airway Pressure)
BiPAP (Bilevel Positive Airway Pressure)
HOME OXYGEN MANAGEMENT
Patient Education:
Safe administration methods for home use.
Use of portable devices and importance of humidity provision.
Knowledge regarding community resources and support.
Home Care Checklist:
Understand proper care and administration of oxygen.
Clearly state the primary provider's prescription for oxygen usage.
Recognize signs indicating a need for changes in therapy.
Describe necessary precautions, including:
Avoiding smoking around oxygen.
Posting "No Smoking-Oxygen in Use" signs.
Informing local fire departments and electric companies about oxygen usage.
Avoiding flammable substances and maintaining distance from ignition sources.
Careful transport protocols for oxygen tanks.
Knowing when to reorder oxygen supplies.
Equipment Maintenance:
Proper usage and adjustment of oxygen delivery devices.
Routine cleaning and replacement protocols for tubing.
Identifying equipment malfunction and electrical outlet performance.
CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD)
Definition: A slowly progressive respiratory disease characterized by airflow obstruction, primarily affecting the airways and lung parenchyma. Includes chronic bronchitis and emphysema.
Characteristics:
Preventable and treatable but not entirely reversible.
PATHOPHYSIOLOGY OF COPD
Airflow Limitation:
Progressive narrowing due to:
Abnormal inflammatory responses to noxious particles or gases.
Chronic inflammation damages tissue, leading to scar tissue formation.
Narrowing of airways.
Decreased elastic recoil and compliance.
Thickened vessel linings and smooth muscle hypertrophy in pulmonary vasculature, resulting in pulmonary hypertension.
RISK FACTORS FOR COPD
Exposure to tobacco smoke.
Older age.
Occupational exposure to irritants.
Pollution exposure.
Genetic abnormalities.
CHRONIC BRONCHITIS
Clinical Diagnosis: Persistent cough and sputum production for at least three months over two consecutive years.
Pathophysiology:
Ciliary function is reduced; bronchial walls thicken, narrowing airways.
Increased mucous gland production makes patients susceptible to respiratory infections.
Damage and fibrosis occur in alveoli.
EMPHYSEMA
Definition: Loss of lung elasticity leading to hyperinflation of the lung.
Characteristics:
Presence of air-filled spaces or bullae in the lungs.
Hyperinflation flattens the diaphragm, necessitating accessory muscle use, increasing effort, and causing dyspnea.
CO2 retention occurs over time, impacting oxygenation.
CLINICAL MANIFESTATIONS OF COPD
Primary Symptoms:
Chronic cough
Sputum production
Dyspnea
Weight loss related to dyspnea
“Barrel chest” appearance due to chest wall changes.
ASSESSMENT AND DIAGNOSIS OF COPD
Methods:
Detailed health history (reference Chart 20-2).
Pulmonary function tests.
Laboratory tests, including arterial blood gas analysis.
Capnogram to estimate CO2 levels.
Chest X-ray analysis for structural changes.
MEDICAL MANAGEMENT OF COPD
Management Strategies:
Promote smoking cessation.
Manage and prevent exacerbations, specifically with pneumococcal and influenza vaccinations.
Provide supplemental oxygen therapy as needed.
Implement pulmonary rehabilitation to improve quality of life and functional status.
MEDICATIONS TO TREAT COPD
Types of Medications:
Bronchodilators: Delivered via MDIs (Metered Dose Inhalers).
Beta2-adrenergic agonists.
Anticholinergics.
Combination agents.
Less commonly, xanthines.
Anti-inflammatories:
Corticosteroids to manage inflammation.
Antibiotics: For treating infections as needed.
Mucolytics: To thin mucus for easier clearance.
Antitussives: To relieve persistent cough.
NURSING CARE OF PATIENTS WITH COPD
Interventions:
Promote oxygenation through various means, including:
Incentive spirometry to encourage deep breathing.
Postural drainage techniques.
Chest percussion and vibration by respiratory therapists.
Breathing exercises outlined in Chart 20-5.
Administer medications timely to enhance gas exchange.
Provide appropriate oxygen therapy and bronchodilator treatments.
BREATHING EXERCISES - PATIENT EDUCATION
General Instructions:
Breathe slowly and rhythmically; exhale fully.
Instruct on nasal inhalation for humidifying air.
Encourage slow breathing, focusing on exhalation during dyspnea.
Diaphragmatic Breathing:
Goal: Strengthen the diaphragm.
Technique: One hand on the abdomen and one on the chest, promote deep abdomen breathing.
Practice and gradually increase duration.
Pursed-Lip Breathing:
Goal: Prolong exhalation and reduce airway resistance.
Technique involves inhalation through the nose and exhaling through pursed lips, maintaining abdominal tension.
POSTURAL DRAINAGE AND NURSING MANAGEMENT OF COPD
Management Strategies:
Refer to Chart 20-4 for a detailed care plan.
Assess patient's health history and diagnostic tests.
Focus on airway clearance and improving respiratory patterns.
Increase patient activity tolerance.
Provide education on proper medication use, including MDIs, smoking cessation, and the importance of consistent exercise and emergency management strategies.
CASE STUDY ANALYSIS
Patient Scenario: A 55-year-old woman with significant COPD history admitted from the ED.
Assessment Findings:
Bilateral expiratory wheezes and crackles detected.
Placed on oxygen therapy with notable respiratory distress and low oxygen saturation (82% on 2 L via nasal cannula).
Expected Clinical Manifestations:
Bradypnea
Shortness of breath or dyspnea
Accessory muscle usage
Forward sitting posture
Barrel chest appearance.
Immediate Actions Required:
Assessments should include asking about recent symptoms, and oxygen saturation re-evaluation.
Increase oxygen delivery as prescribed and consider further diagnostic measures such as ABGs 30 minutes post-intervention.
ASTHMA
Definition: A chronic inflammatory disorder of the airways leading to hyperresponsiveness, mucosal edema, and mucus overproduction.
Significant symptoms during episodes include cough, chest tightness, wheezing, and shortness of breath.
Primarily reversible with treatment or spontaneously over time.
Risk Factors:
Allergies
Environmental triggers
Respiratory infections
Physical exertion
Stressors
Genetic predisposition.
CLINICAL MANIFESTATIONS OF ASTHMA
Common Symptoms:
Cough (may be productive or not)
Dyspnea
Wheezing
Chest tightness
Diaphoresis, tachycardia, hypoxemia, and potential for central cyanosis during severe attacks.
ASTHMA DIAGNOSTICS
Pulmonary Function Tests:
Measurement of FVC (Forced Vital Capacity), FEV (Forced Expiratory Volume), and PEF (Peak Expiratory Flow).
Elevated serum eosinophil count and immunoglobulin E levels may also be evaluated.
MEDICATIONS FOR ASTHMA TREATMENT
Categories of Medications:
Quick-relief: Beta-2 adrenergic agonists and anticholinergics for immediate symptom relief.
Long-acting medications: Corticosteroids and beta-2 adrenergic agonists for ongoing control and prevention.
Leukotriene modifiers: Used for long-term management and prevention.
PATIENT TEACHING FOR ASTHMA
Strategies:
Identifying and avoiding triggers through logging and self-awareness.
Instruction on proper inhalation techniques.
Peak flow monitoring to track respiratory function.
Implementation of an action plan for exacerbations and seeking assistance when needed.
SELF-MANAGEMENT OF ASTHMA
Exacerbation Awareness: Understanding the signs of worsening asthma, including status asthmaticus—a severe and acute airway obstruction episode.
Management Practices: Include regular monitoring, proper medication adherence, and lifestyle adjustments based on symptoms and triggers.
STATUS ASTHMATICUS
Definition: A severe, life-threatening asthma exacerbation that may not respond to standard treatments.
Consequences: Potential for developing pneumothorax and respiratory/cardiac arrest if not managed promptly.
Treatment Approaches:
Administer IV fluids, potent systemic bronchodilators, steroids, epinephrine, and supplemental oxygen as indicated.
PEDIATRICS AND ASTHMA
Overview: Asthma is the most frequently diagnosed chronic illness in childhood.
Approximately 7 million children diagnosed before 18 years in the U.S.
Challenges:
Young children may find nebulizer treatments difficult; spacers can help with inhalers.
Essential education for both child and caregivers, including collaboration with schools for management support.
CYSTIC FIBROSIS (CF)
Definition: The most common autosomal recessive disorder in the Caucasian population, leading to serious respiratory complications.
Genetic Considerations:
Genetic screening is essential for carrier detection.
Genetic counseling is crucial for at-risk couples.
Pathophysiology: Genetic mutation alters chloride transport leading to thick, viscous secretions in multiple body systems.
This predisposes patients to severe respiratory infections, which are the primary cause of morbidity and mortality.
CLINICAL MANIFESTATIONS OF CF
Symptoms:
Respiratory issues (chronic cough, difficulty breathing).
Digestive problems (pancreatic insufficiency).
Growth and weight issues due to malabsorption.
Skin manifestations (salty skin).
Later Life Considerations: Complications can present at various life stages, necessitating ongoing management.
LABORATORY AND DIAGNOSTIC TESTS FOR CF
Key Tests:
Sweat Chloride Test: Levels >50 mEq/L are suspicious; levels >60 mEq/L are diagnostic.
Pulse Oximetry: Monitor for potential deoxygenation.
Chest X-Ray: Look for hyperinflation, thickened bronchial walls or infection signs.
Pulmonary Function Tests: Reduced forced vital capacity and increased residual volumes noted.
THERAPEUTIC GOALS IN CF
Objectives:
Minimize pulmonary complications.
Maximize lung function to ensure quality of life.
Prevent infections through proactive management.
Promote optimal growth and support family adaptation.
CYSTIC FIBROSIS TREATMENT
Intervention Strategies:
Chest physiotherapy multiple times daily.
Use of inhaled dornase alfa to break down mucus.
Oral pancreatic enzymes during meals for digestion support.
Adequate vitamin supplementation (ADEK).
Emphasis on nutrition through a high-calorie, high-protein diet.
MEDICAL MANAGEMENT OF CF
Management Categories:
Chronic Care: Aim to control persistent infections with antibiotics.
Acute Management: Involves aggressive airway clearance and tailored antibiotic therapy based on sputum cultures.
Use of inhaled antibiotics during exacerbations.
Corticosteroids and anti-inflammatory agents for inflammatory control.
Inhaled bronchodilators for mucus clearance and airway dilation.
NURSING MANAGEMENT OF CF
Care Strategies:
Promote pulmonary secretions removal through CPT and respiratory exercises.
Encourage hydration and electrolyte management to support overall health.
Palliative care discussions for end-of-life concerns to address family needs.
QUESTIONS AND CASE STUDY
Question #1: Post-MDI usage with corticosteroids, patients should:
Rinse mouth with water immediately to prevent oral thrush.
Question #2: Nursing intervention for a child with CF to promote mucus clearance would be:
Chest physiotherapy is preferred for effective mucus mobilization.