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A 61-year-old male with a 30-pack-year smoking history and a…

A 61-year-old male with a 30-pack-year smoking history and a 10-year diagnosis of chronic obstructive pulmonary disease (COPD) presents to the pulmonary clinic for a routine evaluation. The patient reports mild dyspnea on exertion but denies any recent exacerbations or infections. He lives independently and uses oxygen at night.   Vitals (on room air): Vital Signs   Heart Rate (HR)  92 bpm Respiratory Rate (RR)  20 breaths/min Blood Pressure (BP)  135/85 mmHg SpO₂ on Room Air  88% BMI  27 kg/m²   Laboratory Results: Lab Test Result Hemoglobin (Hgb) 17.5 g/dL Hematocrit (Hct) 52% White Blood Cell Count (WBC) 8.5 × 10⁹/L Sodium (Na⁺) 138 mEq/L Potassium (K⁺) 4.0 mEq/L Chloride (Cl⁻) 96 mEq/L Creatinine 0.9 mg/dL   Arterial Blood Gas (ABG) Analysis (on room air): Parameter Result pH 7.40 PaCO₂ 57 mm Hg PaO₂ 42 mm Hg HCO₃⁻ 35 mEq/L Base Excess +8 mEq/L SaO₂ 77%   Based upon the clinical presentation, which of the following is the most appropriate next step in the management of this patient?

A 61-year-old male with a 30-pack-year smoking history and a…

A 61-year-old male with a 30-pack-year smoking history and a 10-year diagnosis of chronic obstructive pulmonary disease (COPD) presents to the pulmonary clinic for a routine evaluation. The patient reports mild dyspnea on exertion but denies any recent exacerbations or infections. He lives independently and uses oxygen at night.   Vitals (on room air): Vital Signs   Heart Rate (HR)  92 bpm Respiratory Rate (RR)  20 breaths/min Blood Pressure (BP)  135/85 mmHg SpO₂ on Room Air  88% BMI  27 kg/m²   Laboratory Results: Lab Test Result Hemoglobin (Hgb) 17.5 g/dL Hematocrit (Hct) 52% White Blood Cell Count (WBC) 8.5 × 10⁹/L Sodium (Na⁺) 138 mEq/L Potassium (K⁺) 4.0 mEq/L Chloride (Cl⁻) 96 mEq/L Creatinine 0.9 mg/dL   Arterial Blood Gas (ABG) Analysis (on room air): Parameter Result pH 7.40 PaCO₂ 57 mm Hg PaO₂ 42 mm Hg HCO₃⁻ 35 mEq/L Base Excess +8 mEq/L SaO₂ 77%   Based upon the clinical presentation, which of the following is the most appropriate next step in the management of this patient?