CO2 level in kPa above which brain stem death is confirmed ?

Answer- D. 6.5At the end of a period of observation, typically several minutes, aerial Pco2 should be at least > 6.6-8.0 kPa (50-60 mmHg) for the test to be valid.Apnea is confirmed if no respiratory effo has been observed in the presence of a sufficiently elevated Pco2.