Patients' axillary and rectal temperatures were measured by both mercury and electronic thermometers at each position; Statistical data was collected and processed by SPSS 13.0 for windows. Results: Average rectal and axillary temperatures measured by mercury and electronic thermometers were respectively 38.0 ± 0.9oC, 37.5 ± 0.8oC, 37.8± 0.8oC và 37.3 ± 0.8oC.