Use of MRI images to measure tissue thickness over the ischial tuberosity at different hip flexion.
Use of MRI images to measure tissue thickness over the ischial tuberosity at different hip flexion.
复制标题
使用 MRI 图像测量不同髋关节屈曲时坐骨结节上的组织厚度。
DOI：
10.1002/ca.21119
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Hendrix,RonaldW
中科院分区：
文献类型：
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作者：
Makhsous,Mohsen;Lin,Fang;Cichowski,Andrew;Cheng,Iris;Fasanati,Charles;Grant,Thomas;Hendrix,RonaldW
本实验的目的是研究坐骨结节（IT）上的软组织厚度的变化，由于髋关节屈曲角度的变化和增加坐负荷。对11名健康受试者进行了测试。由泡沫块和气囊构成的装置用于将受试者以不同姿势定位在MRI管内。在四种姿势下获得臀部和大腿的MRI图像：仰卧位、45°髋关节仰卧位、非负重90°髋关节仰卧位和负重90°髋关节仰卧位。测量IT头端和皮肤表面之间的肌肉、脂肪组织和皮肤的厚度，垂直于大腿下方的衬垫。发现90°髋关节置换术（73.8 ± 9.0 mm）中IT上的组织明显（P< 0.001）薄于仰卧位（135.9 ± 8.1 mm）。从仰卧位到非负重90°髋关节，肌肉厚度显著降低（59.1 ± 8.5%，P < 0.001），从非负重到负重90°髋关节，肌肉厚度进一步降低（46.2 ± 7.9%，P < 0.001）。在负重90°髋关节假体下，肌肉组织的变形显著大于脂肪组织和皮肤（P< 0.001）。我们得出结论，覆盖IT的组织厚度随着髋关节屈曲显著降低，并且在坐姿引起的负荷期间进一步降低近一半。此外，肌肉组织在坐着时变形最大。这项研究的结果可能会提高我们对压疮发展的危险因素的理解，因为在不同的姿势下IT上的组织填充变化。临床解剖学24：638-645，2011。© 2011 Wiley利斯公司
The goal of this experiment was to investigate changes in the thickness of the soft tissue overlying the ischial tuberosity (IT) due to changes in hip flexion angle and the addition of a sitting load. Eleven healthy subjects were tested. An apparatus constructed from foam blocks and an air bladder was used to position the subjects in different postures within an MRI tube. MRI images of the buttocks and thigh were obtained for four postures: Supine, 45° Hip Flexion, Non‐Weight‐Bearing 90° Hip‐Flexion, and Weight‐Bearing 90° Hip‐Flexion. The thickness of muscle, adipose tissue, and skin was measured between the IT tip and skin surface, perpendicular to the cushion placed beneath the thighs. The tissue overlying the IT was found to be significantly (P< 0.001) thinner in 90° Hip‐Flexion (73.8 ± 9.0 mm) than in the supine position (135.9 ± 8.1 mm). Muscle thickness decreased significantly from Supine to Non‐Weight‐Bearing 90° Hip‐Flexion (59.1 ± 8.5%,P< 0.001), and further decreased from Non‐Weight‐Bearing to Weight‐Bearing 90° Hip‐Flexion (46.2 ± 7.9%,P< 0.001). Under Weight‐Bearing 90° Hip‐Flexion, the muscle tissue deformed significantly (P< 0.001) more than the adipose tissue and skin. We concluded that the tissue thickness covering the IT significantly decreased with hip flexion, and further decreased by nearly half during loading caused by sitting. In addition, the muscle tissue experienced the largest deformation during sitting. The results of this study may improve our understanding of risk factors for pressure ulcer development due to changes in tissue padding over the IT in different postures. Clin. Anat. 24:638–645, 2011. © 2011 Wiley‐Liss, Inc.