Case series of COVID-19 patients from the Qinghai-Tibetan Plateau Area in China

Figure 1 Dynamic blood gas analysis of three critical patients. A: PCO₂, lactic acid, and concentration of HCO₃ remained basically stable. O₂ partial pressure and O₂ saturation gradually increased. Total blood O₂ concentration gradually increased and remained stable; B: PCO₂ remained stable as the condition improved. O₂ partial pressure gradually increased and remained stable. O₂ saturation gradually increased. Lactic acid, concentration of HCO₃, and total blood O₂ remained stable; C: PCO₂ remained stable as the condition improved. O₂ partial pressure and O₂ saturation gradually increased and remained stable. Lactic acid, concentration of HCO₃, and total blood O₂ remained stable.