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Table 1 Arterial and venous blood gas analysis immediately post-surgery, three hours post-surgery and 18 hours after surgery

From: Analgesic management of an eight-year-old Springer Spaniel after amputation of a thoracic limb

Parameters measured Immediately after surgery (arterial blood) Reference range arterial blood for dogs [13] Three hours after surgery (venous blood) Reference range venous blood for dogs [21] Eighteen hours after surgery (arterial blood) Reference range arterial blood for dogs [13]
pH 7.203 7.38 - 7.44 7.374 7.33 - 7.38 7.383 7.38 - 7.435
PCO2 (kPa) 8.65 4.51 - 5.31 5.04 5.03 - 6.20 5.53 4.51 - 5.31
PO2 (kPa) 15.89 11.5 - 13.03 12.83 6.05 - 8.61 12.93 11.5 - 13.03
HCO3-std (mmol/l) 21.3 20.5 - 23.9 21.7 20.9 - 23.5 23.8 20.5 - 23.9
Base excess (mmol/l) -3.9 -2.6 - 0.4 -3.3 -3.8 - -0.4 -0.9 -2.6 - 0.4
Interpretation Primary respiratory acidosis Within acceptable limits (with mild hyperoxaemia) Within acceptable limits