65 year old male known COPD, presents to ED as priority 1 with SOB and sats 60% RA. History not known as patient not able to talk.

BP 170/60 HR 140 SATS 96% on neb Temp 36

Initial VBG,

pH        7.04             (7.32 – 7.43)            Sodium:    140 mmol/L (135 – 145)

pCO2:   112 mmHg   (37 – 50)                Potassium:    4.6 mmol/L (3.5 – 5.2)

pO2:     30 mmHg   (36 – 44)                   Chloride:    104mmol/L (95 – 110)

HCO3:     29 mmol/L  (22 – 28)                 Creatinine:     69umol/L (60 – 110)

Base XS: -8 mmol/L    (-3 – 3)                 Glucose:   9.3 mmol/L (3.0 – 5.4)

Saturation: 35 %                                      Lactate:   2.8  mmol/L (< 1.5)

ABG done soon after arrival on an FiO2 0.4

pH   7.04              (7.32 – 7.43)                    Sodium: 138 mmol/L (135 – 145)

pCO2: 83mmHg   (37 – 50)                          Potassium:  4.7  mmol/L (3.5 – 5.2)

pO2:  153mmHg   (36 – 44)                          Chloride:  106   mmol/L (95 – 110)

HCO3:  24mmol/L (22 – 28)                          Creatinine: 69    umol/L (60 – 110)

Base XS: -8 mmol/L (-3 – 3)                         Glucose: 11.8  mmol/L (3.0 – 5.4)

Saturation: 98                                              Lactate: 1.7 mmol/L (< 1.5)

1. Describe and interpret the ABG
2. In general, how do ABG measurements correlate with VBG results?