表 2.
主动脉弓、头臂干和气管的解剖学测量值（mm）
Anatomical measurements of the aortic arch, the brachiocephalic trunk and the trachea (mm)
| Anatomical structure | Male (n=70) | Female (n=21) | t | P | |||||
| Maximum | Minimum | Mean±SD | Maximum | Minimum | Mean±SD | ||||
| The distance between the brachiocephalic trunk and the cricoid cartilage was not measured in 3 cases (2 male and 1 female) where the brachiocephalic trunk and the trachea were not intersected. *P < 0.05. | |||||||||
| Outer diameter of aortic arch | 41.34 | 14.82 | 31.00±5.17 | 38.84 | 15.96 | 27.77±5.21* | 2.512 | 0.014 | |
| Outer diameter of brachiocephalic trunk | 20.87 | 9.74 | 14.24±2.37 | 17.51 | 8.02 | 12.19±2.55* | 3.411 | 0.001 | |
| Distance between aortic arch and cricoid cartilage | 95.17 | 51.18 | 73.22±9.45 | 86.43 | 56.05 | 73.88±8.71 | 0.283 | 0.778 | |
| Distance between brachiocephalic trunk and cricoid cartilage | 73.49 | 23.59 | 50.22±10.22 | 77.12 | 26.00 | 49.16±12.23 | 0.391 | 0.697 | |
| Length of trachea | 130.47 | 94.74 | 112.34±8.81 | 114.31 | 86.49 | 105.23±6.08* | 3.452 | 0.001 | |
| Outer diameter of trachea | 25.59 | 14.55 | 20.78±2.45 | 20.05 | 11.12 | 15.75±2.30* | 8.383 | 0.000 | |