Liang Yuan, Yang Lixun, Zhang Jiale, Hu Jinlong, He Jinshan, Chen Pengtao, Wang Jingcheng
Department of Orthopedics Northern Jiangsu People's Hospital Affiliated to Yangzhou University, Nantong West Road 98, Yangzhou, 225001, China.
Orthop Rev (Pavia). 2024 Jul 3;16:94103. doi: 10.52965/001c.94103. eCollection 2024.
The potential role of deltoid muscle density in the occurrence of proximal humeral fractures remains uncertain. Therefore, the primary objective of this study was to examine the correlation between deltoid muscle density, as measured by CT attenuation value in Hounsfield units (HU), and the incidence of proximal humeral fractures in elderly patients. By investigating this association, we aim to shed light on the possible influence of deltoid muscle density on fracture risk in this specific population.
A total of 68 patients with computed tomography (CT) images were retrospectively reviewed. Among them, 34 patients presented with fractures following low-energy injuries, while the remaining 34 patients served as controls and underwent CT scans after low-energy injuries without any fractures. The muscle density of the deltoid muscles was assessed at the approximate tubercle of humerus. We compared these parameters between the two groups and conducted analyses considering factors such as age, sex, laterality, and deltoid muscle density of the shoulders.
The demographic factors related to the shoulder did not exhibit any significant association with proximal humeral fracture. However, we observed a noteworthy difference in deltoid muscle density between patients with fractures (40.85 ± 1.35) and the control group (47.08 ± 1.61) (p = 0.0042), indicating a lower muscle density in the fracture group.
Based on the findings of this study, we can conclude that there exists a negative correlation between deltoid muscle density and the incidence of proximal humeral fractures. These results suggest that lower deltoid muscle density may be associated with an increased risk of proximal humeral fractures in the elderly population under investigation.
三角肌密度在肱骨近端骨折发生中的潜在作用仍不明确。因此，本研究的主要目的是通过测量Hounsfield单位（HU）的CT衰减值来检查三角肌密度与老年患者肱骨近端骨折发生率之间的相关性。通过研究这种关联，我们旨在阐明三角肌密度对这一特定人群骨折风险的可能影响。
回顾性分析了68例有计算机断层扫描（CT）图像的患者。其中，34例患者因低能量损伤导致骨折，其余34例患者作为对照，在低能量损伤后未发生骨折的情况下接受了CT扫描。在肱骨大致结节处评估三角肌的肌肉密度。我们比较了两组之间的这些参数，并考虑了年龄、性别、侧别和肩部三角肌密度等因素进行分析。
与肩部相关的人口统计学因素与肱骨近端骨折均无显著关联。然而，我们观察到骨折患者（40.85±1.35）和对照组（47.08±1.61）的三角肌密度存在显著差异（p = 0.0042），表明骨折组的肌肉密度较低。
基于本研究的结果，我们可以得出结论，三角肌密度与肱骨近端骨折的发生率之间存在负相关。这些结果表明，在所研究的老年人群中，较低的三角肌密度可能与肱骨近端骨折风险增加有关。
