title: Measuring PCO2 for gastric tonometry: precision is as important as bias.
mesh_terms: D015982:Bias; D002245:Carbon Dioxide / Q000032:analysis*; D005753:Gastric Mucosa / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry / Q000379:methods*; D010313:Partial Pressure
chemical_list: D002245:Carbon Dioxide