Ten millilitres of blood.
D000368:Aged; D001769:Blood / Q000378:metabolism; D001784:Blood Gas Analysis / Q000295:instrumentation*; D001806:Blood Urea Nitrogen; D002245:Carbon Dioxide / Q000378:metabolism; D004573:Electrolytes / Q000378:metabolism; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007415:Intestinal Obstruction / Q000175:diagnosis*; D008297:Male; D010092:Oximetry; D010783:Photometry
D004573:Electrolytes; D002245:Carbon Dioxide