Exam 2 Flashcards
(129 cards)
Common causes of impaired gas exchange (6)
Age
Smoking
Chronic and acute medical conditions
Brain injury
Prolonged immobility
Inhalation irritants
Diagnostics for Gas exchange problem (8)
- Chest X-ray (detect TB)
- CT Scan
- Pulmonary Function Studies (usually reduced in COPD and restrictive diseases, old age)
- Invasive (Bronchoscopy, laryngoscopy (larynx), mediastinoscopy (above sternum for tumors)
- CBC
- ABG
- sputum (negative after 3 months of TB treatment)
- BNP (rule out CHF)
Nursing Care and Patient education for Pulmonary Function tests (5)
- Explain purpose and procedure to reduce anxiety-induced dyspnea
- May need to withhold bronchodilators 4-6 hrs before the test
- Patient should not smoke 6-8 hrs before test
- Patient breathes through mouth (Nose clip to prevent air escaping through nose)
- Assess patient for dyspnea or bronchospasm after procedure
4 Types of Pulmonary Function Studies
Forced vital capacity (FVC)- max amount of air that can be exhaled as quickly as possible after maximum inspiration. (decreased)
Forced expiratory volume (FEV)- max amount of air exhaled (decreased)
Peak expiratory flow rate (PEFR)- usually decreased
FRC (functional residual capacity) - the amount of air remaining in the lungs after normal expiration. (increased w/ air trapping i.e. emphysema)
Purpose of Bronchoscopy (5)
- Diagnose and manage pulmonary disease
- Help place or change endotracheal tube
- Collect specimens
- Removal of secretions not cleared by normal suctions
- Stent placement (open up strictures in trachea and bronchus)
5 Potential complications after Bronchoscopy (and nursing care for each)
- hypoxemia (maintain airway; give O2; monitor vitals q15 monitor for first two hrs)
- aspiration (check for gag reflex (pt NPO till return), suction prn)
- bleeding (hemoptysis)
- infection
- bronchospasm (indicated by stridor
Preparation for Bronchoscopy (4)
- Explain procedure and verify consent given
- Document patient allergies
- Patient is NPO 4-8 hrs prior to procedure (and 2 hrs after until gag reflex returns) to prevent aspiration
- Benzos or opioids given for sedation
Bronchoscopy: Benzocaine
Use
Complication
s/s of complication (3)
Treatment of complication (2)
Use: topical anesthetic used cautiously to numb oropharynx
Complication: methemoglobinemia (conversion of hemoglobin to methemoglobin which does not carry oxygen so leads to tissue hypoxia)—less likely with lidocaine
S/s: cyanosis after topical anesthetic, no response to supplemental oxygen, blood is chocolate-brown color
Treatment: oxygen and IV of 1% methylene blue
Acute findings of Impaired Gas exchange (8)
Tachypnea
Tachycardia
Accessory Muscle Use
Paradoxical chest movement (in on inspiration, out on expiration)
Pursed lip breathing
Pale skin
Adventitious Breath Sounds
Mucus/secretions
Chronic problems of impaired gas exchange (4)
Cyanosis
Clubbing of nails
Barrel chest (emphysema)
Orthopneic
Normal ABG values
pH
CO2
pO2
HCO3
O2 sat
pH: 7.35-7.45
CO2: 35-45 mm Hg
pO2: 80-100 mm Hg
HCO3: 21-28 mEq/L
O2 sat: 95-100%
ABGs: What do the following present as?
Respiratory Acidosis
Respiratory Alkalosis
Metabolic Acidosis
Metabolic Alkalosis
Respiratory Acidosis: pH < 7.35; CO2 > 45
Respiratory Alkalosis: pH > 7.45; CO2 < 35
Metabolic Acidosis: pH < 7.35; HCO3 < 21
Metabolic Alkalosis: pH > 7.45; HCO3 > 28
COPD: Basic Pathophysiology - 2
Chronic Bronchitis: airway problem due to inflammation of airway after exposure to irritants
Pulmonary emphysema: alveolar problem where lung elastic tissue loses ability to recoil after stretching
Risk factors for COPD (3)
- cigarette smoking (esp 20 pack year)
- Alpha1-antitrypsin deficiency ( ATT is normally in lungs and inhibits excess protease activity so protease only breaks down pollutants and not lungs but w/o ATT, protease breaks down lungs)
- asthma
S/s of chronic bronchitis (5)
- bronchospasm
- copious sputum (leads to narrowed airways
- thin/wasted
- hypoxemia (low PaO2) and cyanosis
- clubbing
Complications of COPD (6)
- Hypoxemia (leads to polycythemia)
- Acidosis (r/t CO2 retention and hyperinflation)
- Respiratory infection (due to increased mucus; pneumonia and influenza vaccines important)
- Cor pulmonale (right sided heart failure due to pulmonary disease leads to right ventricular hypertrophy and backup of blood into venous system; S/s: dependent edema)
- Dysrhythmias (due to hypoxemia, drug effects, acidosis)
- Respiratory Failure
S/s of emphysema (7)
- hyperinflation of lungs (flattened diaphragm)
- tachypnea and dyspnea
- barrel chest
- orthopneic or tripod position (forward-bending posture w/ arms held forward)
- hypercapnia (due to uncoordinated breathing; respiratory acidosis)
- chronic hypoxia (leads to polycythemia i.e. increased RBC)
- breath sounds: wheezes or reduced if airflow obstruction
Anti-inflammatory drugs for COPD
Corticosteroids (Beclomethasone, Prednisone)
5 patient education points
- use daily b-c max effectiveness w/ 48-72 hrs of continued use
- Side effects: increase risk for infections (Candida albicans in mouth; URI if around people w/ one)
- avoid Risky activities (fragile BVs increase risk for bruising and petechiae)
- do not stop abruptly stop drug b-c it suppresses adrenal production of essential corticosteroids
- take with food to reduce risk for GI ulceration
Bronchodilators for COPD
SABA (albuterol) -1
LABA (arformoteral) -1
Anticholinergic (ipratropium) -3
SABA
- for acute relief
LABA
- for long term relief
Anticholinergic
- prevent COPD bronchospasm
- carry at all times
- S/s of overdose: blurred vision, eye pain, headache, nausea, palpitations, tremors, inability to sleep, dry mouth (increase fluids)
Other drugs for COPD
Mucolytics (Acetylcysteine, dornase alpha, guaifenesin) - 2
Oxygen - 2
Mucolytics (Acetylcysteine, dornase alpha, guaifenesin)
- thins secretions so easier to expectorate and cough up
- guaifenesin can raise cough threshold
Oxygen
- Usually oxygen flow of 2-4 L/min via nasal cannula or 40% via venturi mask
- ALL hypoxic patients should get oxygen therapy so SpO2 b/w 88-92%
COPD: nonpharmacological management of impaired gas exchange (5)
- Positioning (HOB elevated, orthopneic )
- Effective and controlled coughing ( scheduled coughing in morning, prior to bed, and at meals)
- Exercise conditioning (2-3 times a week of walking; resistive breathing, isocapnic hyperventilation machine)
- Suctioning (only if weak cough, pulmonary muscles or inability to expectorate)
- Hydration ( 2L of fluid a day)
COPD: Weight loss prevention (8)
- Collab w/ RDN for easy to chew and non-gas forming foods
- High calorie, high protein
- Plan biggest meal of day when pt most hunger and well rested
- 4-6 small, frequent meals preferred to 3 large meals
- Use breathing techniques and bronchodilators 30 minutes prior to meal to reduce bronchospasm
- Avoid dry foods that stimulate coughing
- Avoid caffeine that can increase urine output and lead to dehydration
- Avoid drinking fluids before or during meals if early satiety
COPD: Improving Endurance
Patient Education (5)
- Avoid rushing in morning b-c can increase dyspnea
- Use energy conservation (plan and pace activities for best tolerance and minimum discomfort i.e. divide activities into smaller parts)
- Avoid working w/ arms raised (raised arms reduce exercise tolerance b-c accessory muscles work to keep arms up instead of helping w/ breathing)
- Do not talk during activities requiring energy (walking)
- Avoid breath holding while performing any activity
COPD: Breathing Exercises
- Diaphragmatic/ abdominal breathing
- Pursed-lip breathing (2)
Diaphragmatic/ abdominal breathing
- Patient consciously increases movement of diaphragm while lying on back to relax abdomen
Pursed-lip breathing
- Mild resistance created by breathing through pursed lips to prolong exhalation and increase airway pressure
- Delays airway compression and reduces air trapping