80 year old female presents complaining of increased fatigue. The patient has had a recent admission for hyponatraemia and has a background of COPD

ABG below on FiO2 0.32

pH 7.305                                            Na 125mmol/l

pCO2 93 mmHg                               K 4 mmol/l

pO2 62mmHg                                  Cl 76mmol/l

HCO3 44 mmHg                               Cr 37 umol/l

B/E 15                                                Glu  8 mmol/l

Lactate 0.5mmol/l

Describe and interpret the ABG