Effect of driver dimensions (length and diameter) on pressure range and mean pressures.

Data as shown as mean± s.e.m., n = 10. Driven section length: 72.5 in.Mild (>20–50 psi), Moderate (>50–90 psi) and Severe (>90–130 psi) bTBI classification.*This length was from the first-generation design of the shock tube, in which the driver was filled for variable time intervals (range, 500 ms-3 s) to produce an incremental increase in pressures (range, 17–44 psi). Abbreviations: in-inch; psi-pounds per square inch.Effect of driver dimensions (length and diameter) on pressure range and mean pressures.数据以平均值±标准误（mean±s.e.m.）表示，样本量n=10。激波管驱动段长度：72.5英寸（in）。轻度（>20~50磅每平方英寸（psi））、中度（>50~90 psi）及重度（>90~130 psi）创伤性脑损伤（blast traumatic brain injury，简称bTBI）分级标准。*该长度源自激波管第一代设计方案，此时驱动段充压时长可变（范围为500毫秒~3秒），以实现压力的渐进式升高（压力范围为17~44 psi）。缩写说明：in为英寸；psi为磅每平方英寸。驱动段尺寸（长度与直径）对压力范围及平均压力的影响。