Shanahan D F, Reading T E
Aviat Space Environ Med. 1984 Feb;55(2):117-21.
Because of the high prevalence of back pain experienced by U.S. Army helicopter pilots, a study was conducted to ascertain the feasibility of reproducing these symptoms in the laboratory. A mock-up of a UH-1H seat and control configuration was mounted to a multi-axis vibration simulator (MAVS). Eleven subjects were tested on the apparatus for two 120-min periods. During one period, the MAVS was programmed to reproduce vibrations recorded from a UH-1H in cruise flight. The subjects received no vibration during the other test period. All subjects reported back pain which they described as identical to the pain they experience during flight, during one or more of their test periods. There was no statistical difference between the vibration and nonvibration test conditions (p greater than 0.05) in terms of time of onset of pain or intensity of pain as measured by a visual analog scale. It appears the vibration at the frequencies and amplitudes tested plays little or no role in the etiology of the back symptoms reported by these pilots. It is proposed that the primary etiological factor for these symptoms is the poor posture pilots are obliged to assume for extended periods while operating helicopters.
由于美国陆军直升机飞行员背痛的发生率很高，因此进行了一项研究，以确定在实验室中重现这些症状的可行性。将UH-1H座椅和控制配置的模型安装到多轴振动模拟器（MAVS）上。11名受试者在该设备上进行了两个120分钟时间段的测试。在一个时间段内，MAVS被编程为重现UH-1H在巡航飞行中记录的振动。在另一个测试时间段内，受试者未受到振动。所有受试者在一个或多个测试时间段内均报告出现背痛，且他们描述这种疼痛与飞行期间经历的疼痛相同。就通过视觉模拟量表测量的疼痛发作时间或疼痛强度而言，振动和非振动测试条件之间没有统计学差异（p大于0.05）。看来，在所测试的频率和振幅下的振动在这些飞行员报告的背部症状的病因中几乎没有作用或不起作用。有人提出，这些症状的主要病因是飞行员在操作直升机时被迫长时间保持不良姿势。
