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“肩关节X线灯泡征”学习笔记

  • 2026-03-25 18:48:03
“肩关节X线灯泡征”学习笔记

灯泡征是指在肩关节正位X线中存在后脱位可能的影像学表现。由于肱骨近端内旋,肱骨头的形态变圆,呈灯泡状,所以称为灯泡征。

但灯泡征并不能完全确定肩关节是否后脱位,还需结合其他影像学征象,如槽线征、环征,当然也要结合临床症状及体征等综合判断。下面小编带你学会如何观察这几个影像学征象。

首先我们一起来复习一下肩关节X线的大体解剖结构。肩关节是全身最灵活的关节,由锁骨、肩胛骨和肱骨三块骨构成,主要形成盂肱关节。

锁骨呈横S型弯曲,内侧端粗大,有关节面,与胸骨柄相关节,称胸骨端。外侧端扁平,有小关节面,与肩胛骨肩峰相关节,称肩峰端。

肩胛骨为三角形扁骨,贴于胸廓后外面,介于第二到第七肋骨之间,有三个边缘和三个角。

上缘短而薄,外侧有凸向前的指状突起,称喙突。内侧缘薄而锐利,因临近脊柱,故又称脊柱缘。外侧缘肥厚,临近腋窝称腋缘。上角为上缘与脊柱缘汇合处,平对第二肋。下角为脊柱缘与腋缘汇合处,平对第七肋。外侧角为腋缘与上缘汇合处,最肥厚,朝向外侧的梨形浅窝称关节盂,与肱骨头相关节。肩胛骨背面有一横嵴,称肩胛冈。肩胛冈向外侧延伸的扁平突起称肩峰,与锁骨外侧端相关节,称肩锁关节。肱骨为长管状骨,上端有朝向上后内方呈半球形的肱骨头,与肩胛骨的关节盂相关节。头周围的环状浅沟称解剖颈。肱骨头的外侧和前方有隆起的大结节和小结节,大小结节向下各延伸一嵴,两结节间有一纵沟称结节间沟。上端与体交界处稍细称外科颈,较易发生骨折。

了解完肩关节X线解剖结构后,我们再来看正常的肩关节,肱骨头与关节盂是有部分重叠的,称为半月重叠征,或半月征。

当发生后脱位时,肱骨头与关节盂前缘距离大于等于7毫米,甚至关节盂变为空虚,

表现为关节盂前缘形成类似环的影像,称为环征。

常可伴肱骨内旋,肱骨头投影变圆呈灯泡征。肱骨内旋后,大小结节投影有时候会形成一条折线,称M字征。

需要注意在肩关节正位摄影体位不标准,肱骨不能外旋的情况下,也会出现M字征。

其次,我们要注意外伤患者不仅有肩关节脱位,有时还会伴随骨折出现。有一个很典型的影像学表现就是槽线征,当肱骨头撞击关节盂后缘,骨质形成压缩性骨折,表现为肱骨头内侧骨皮质与反Hill-Sachs骨折块形成的近乎平行线,称槽线征。

槽线征的识别对判断肱骨头内侧压缩性骨折至关重要。我们可以在肩关节的X线或者CT检查中清晰看到后脱位的肱骨头向关节窝的后方移位,同时也可显示肱骨头内侧受撞击形成的压缩性骨折(反Hill-Sachs骨折)。

需要注意出现槽线征时,盂肱关节间隙有时候狭窄,也有时候是增宽的,这也是在只有肩关节正位X线检查中比较容易出现漏诊的地方。

——————end——————

友情提醒:以上内容为学习笔记分享,📝不够完善,因个体差异较大,不构成医疗意见,仅供参考学习,欢迎大家指正🤝

文字|肌骨力学笔记

图片|来源网络,如有侵权请联系删除🙏

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  1. CONNECT:[ UseTime:0.000555s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000774s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000300s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000277s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000471s ]
  6. SELECT * FROM `set` [ RunTime:0.000235s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000513s ]
  8. SELECT * FROM `article` WHERE `id` = 475223 LIMIT 1 [ RunTime:0.003882s ]
  9. UPDATE `article` SET `lasttime` = 1774439765 WHERE `id` = 475223 [ RunTime:0.011180s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000306s ]
  11. SELECT * FROM `article` WHERE `id` < 475223 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000593s ]
  12. SELECT * FROM `article` WHERE `id` > 475223 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000407s ]
  13. SELECT * FROM `article` WHERE `id` < 475223 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000763s ]
  14. SELECT * FROM `article` WHERE `id` < 475223 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001252s ]
  15. SELECT * FROM `article` WHERE `id` < 475223 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001345s ]
0.092504s