A client hаs hаd cоntinuоus nаsоgastric suction for 48 hours. The client reports weakness and tingling around the mouth. Assessment reveals muscle twitching and hyperreflexia. ABG results are: pH: 7.51 PaCO₂: 43 mm Hg HCO₃⁻: 34 mEq/L The nurse should interpret these findings as: