Impaired Gas Exchange: COPD Exacerbation
PES Statement: Impaired Gas Exchange related to alveolar-capillary membrane changes, air trapping, and ventilation-perfusion mismatch secondary to chronic obstructive pulmonary disease exacerbation as evidenced by arterial blood gas showing PaO2 54 mmHg and PaCO2 62 mmHg, SpO2 83% on room air, respiratory rate 28 breaths/min, tripod positioning, pursed-lip breathing, and patient report of severe air hunger.
Assessment Cues (Subjective & Objective)
- Patient states: 'I feel like I cannot catch my breath even when sitting completely still.'
- Patient reports severe throbbing frontal headache upon awakening.
- Patient states: 'I am completely exhausted from fighting for every single breath.'
- SpO2: 83% on room air; PaO2: 54 mmHg; PaCO2: 62 mmHg; arterial pH: 7.31.
- Respiratory Rate: 28 breaths/min with prominent scalene and intercostal retractions.
- Auscultation: Distant breath sounds with prolonged expiratory wheezing bilaterally and basilar crackles.
- Inspection: Seated in orthopneic tripod position leaning on overbed table; facial flushing; digital clubbing.
NOC Expected Outcomes (SMART Goals)
- Short-Term (Within 2 Hours): Patient will achieve and maintain SpO2 between 88% and 92% on titrated Venturi mask oxygen therapy. Target: SpO2 88-92%, RR 16-22 breaths/min
- Short-Term (By End of 12-Hour Shift): Patient will demonstrate arterial blood gas stabilization toward chronic baseline (pH ≥ 7.35, PaO2 ≥ 60 mmHg) with absence of somnolence or flapping asterixis. Target: pH ≥ 7.35, Alert & Oriented x4
- Long-Term (By Discharge / Day 4): Patient will independently demonstrate pursed-lip breathing during ambulation and verbalize three red-flag signs of CO2 narcosis requiring emergency contact. Target: 100% teach-back on pursed-lip breathing and red-flag symptoms
NIC Interventions & Physiological Rationales
Intervention: Position patient in High-Fowler's or orthopneic tripod position leaning forward supported by a padded bedside table.
Rationale: Leaning forward stabilizes the shoulder girdle, allowing accessory muscles (pectoralis major/minor) to assist chest expansion while gravity pulls abdominal viscera away from the diaphragm, increasing functional residual capacity.
Intervention: Coach patient in Pursed-Lip Breathing (inhale 2 seconds through nose, exhale slowly 4 seconds through pursed lips).
Rationale: Exhaling against pursed lips generates intrinsic positive end-expiratory pressure (PEEP) in proximal airways, preventing dynamic airway collapse during exhalation and facilitating CO2 exhalation.
Intervention: Cluster physical care activities and schedule 30-minute uninterrupted rest periods between nursing interventions.
Rationale: Severe respiratory distress diverts up to 40% of cardiac output solely to respiratory muscle work; clustering care conserves metabolic oxygen consumption (VO2).
Intervention: Administer titrated oxygen therapy via 28% Venturi mask, maintaining SpO2 strictly between 88% and 92%.
Rationale: Venturi masks deliver a precise FiO2 independent of patient breathing pattern, preventing severe hypoxemia while avoiding loss of hypoxic pulmonary vasoconstriction and excessive hypercapnic worsening.
Intervention: Administer prescribed short-acting beta-2 agonist (albuterol 2.5 mg) and anticholinergic (ipratropium 0.5 mg) via nebulizer Q4-6H PRN.
Rationale: Albuterol stimulates beta-2 receptors causing rapid bronchial smooth muscle relaxation; ipratropium blocks cholinergic bronchoconstriction and reduces goblet-cell mucus production.
Intervention: Administer prescribed systemic corticosteroid (methylprednisolone 40 mg IV Q12H) and monitor capillary blood glucose.
Rationale: Glucocorticoids suppress bronchial mucosal inflammatory cascades, reducing bronchial hyperreactivity and edema.
Intervention: Instruct patient on proper Metered-Dose Inhaler (MDI) technique using a valved holding chamber (spacer), followed by warm water oral gargling.
Rationale: Spacers eliminate breath-actuation coordination errors, increasing pulmonary drug deposition by over 30% while oral rinsing prevents oropharyngeal candidiasis (thrush).