Unité de pathologie rachidienne, hôpital Pellegrin, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France.
Unité de pathologie rachidienne, hôpital Pellegrin, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France.
Orthop Traumatol Surg Res. 2018 Sep;104(5):565-568. doi: 10.1016/j.otsr.2018.06.005. Epub 2018 Jul 31.
Pelvic incidence (PI) is an anatomical parameter that is considered invariable in a given individual. Although changes in posture influence the mobile lumbar spine, lumbar lordosis (LL) and the pelvis are typically evaluated only in the standing position. Thus, whether other positions commonly used during daily activities influence the relationship between LL and PI is unknown. The objective of this study was to determine whether LL and sacral slope (SS) correlated with PI, using two standardised positions, seated and supine, different from the standing position that is generally used.
We are supposing that lumbar lordosis and sacral sloop are correlated to pelvic incidence whatever the posture. The goal of this study was to confirm or deny this hypothesis, using two standardize positions (sitting and lying) different that the usual standing position. LL and SS correlate with PI in the standing, seated, and supine positions.
Lumbar and pelvic parameters were measured on radiographs obtained in the standing, seated, and supine positions in 15 asymptomatic adult volunteers younger than 50years of age. Mean values with their standard deviations were computed and compared across the three positions using ANOVA. Spearman's test was applied to assess correlations.
PI had the same value in all three positions. The L1-S1 LL angle was 54.8±9.8° in the standing position, 15.9±14.6° in the seated position, and 50.2±9.6° in the supine position. Pelvic tilt (PT) in the same three positions was 12.1±6.3°, 37.7±10.4°, and 9.5±5.1°, respectively; and SS was 37.1±6.3°, 11.3±10.8°, and 41±7.2°, respectively. Correlations were strongest in the supine position between PI and LL (r=0.72), LL and SS (r=0.9), and PI and SS (r=0.84).
Whereas PI remains unchanged in a given individual, lumbar lordosis and sacral orientation show significant changes across positions used in daily life, with the greatest changes seen in the seated position. During spinal fusion surgery, adjusting LL based on IP is crucial even in patients who have limited physical activity.
IV.
骨盆入射角（PI）是一个在个体中被认为是不变的解剖参数。虽然姿势变化会影响活动腰椎，但通常仅在站立位评估腰椎前凸（LL）和骨盆。因此，在日常活动中常用的其他姿势是否会影响 LL 和骶骨倾斜度（SS）与 PI 的关系尚不清楚。本研究的目的是确定在使用两种不同于通常使用的站立位的标准坐姿和仰卧位时，LL 和 SS 是否与 PI 相关。
我们假设无论姿势如何，腰椎前凸和骶骨倾斜度都与骨盆入射角相关。本研究的目的是使用两种标准化的（坐姿和仰卧位）不同的姿势来证实或否定这一假设，而不是通常的站立位。在站立、坐姿和仰卧位时，LL 和 SS 与 PI 相关。
在 15 名年龄小于 50 岁的无症状成年志愿者中，在站立、坐姿和仰卧位拍摄 X 线片，测量腰椎和骨盆参数。计算并比较三个位置的平均值及其标准差，使用 ANOVA 进行比较。应用 Spearman 检验评估相关性。
PI 在三个位置相同。在站立位时，L1-S1 的 LL 角度为 54.8°±9.8°，在坐姿时为 15.9°±14.6°，在仰卧位时为 50.2°±9.6°。在相同的三个位置，骨盆倾斜度（PT）分别为 12.1°±6.3°、37.7°±10.4°和 9.5°±5.1°；SS 分别为 37.1°±6.3°、11.3°±10.8°和 41°±7.2°。PI 与 LL（r=0.72）、LL 与 SS（r=0.9）以及 PI 与 SS（r=0.84）之间的相关性在仰卧位最强。
在个体中，PI 保持不变，而在日常生活中使用的不同姿势下，腰椎前凸和骶骨方位发生显著变化，在坐姿中变化最大。在脊柱融合手术中，即使患者活动量有限，根据 PI 调整 LL 也很重要。
IV。
