Chen Y G, Li F B, Huang C D
Department of Orthopedics, First Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou.
Zhonghua Yi Xue Za Zhi. 1994 Jan;74(1):40-2, 64.
The intervertebral distance in 31 prolapsed discs under traction increased on the average by 1.34 mm, but in normal discs 0.87 mm. Of 47 prolapsed discs without traction, 29 had negative intradisc pressure, 10 zero, and 8 positive. The total average value of the pressure before traction was -1.3 kPa. Under lumber traction, the pressure decreased in 30 discs, unchanged in 8, and increased in 9, with the average value being -3.2 kPa. The intradisc pressure in 7 normal discs was contrary to the pressure in the prolapsed disc. The difference between the two groups was highly significant (P < 0.01). The pressure unchanged when the intervertebral distance of prolapsed disc unchanged under traction, but the pressure decreased as the distance increased in most cases under traction.
31例牵引状态下的椎间盘突出症患者，椎间隙距离平均增加1.34mm，而正常椎间盘平均增加0.87mm。47例未牵引的椎间盘突出症患者中，29例椎间盘内压力为负，10例为零，8例为正。牵引前压力的总平均值为-1.3kPa。腰椎牵引时，30例椎间盘压力降低，8例不变，9例升高，平均值为-3.2kPa。7例正常椎间盘的椎间盘内压力与椎间盘突出症患者的压力相反。两组之间的差异具有高度显著性（P<0.01）。牵引时椎间盘突出症患者的椎间隙距离不变，则压力不变，但在大多数牵引情况下，随着距离增加压力降低。
