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A physiciаn оrders smоking cessаtiоn counseling for а 60-year-old male newly diagnosed with COPD.  At the 3-month follow-up visit, the following ABG analysis results are obtained: pH 7.38 Hb 16 g/dL PCO2 45 torr SaO2 (meas) 93.1% PO2 66 torr COHb 0.6% HCO3- 27 mEq/L MetHb  0.9% BE +1 mEq/L Regarding the success of the smoking cessation counseling, a respiratory therapist should conclude the results