Ultrasonography department, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
The Children's Heart Center, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
BMC Musculoskelet Disord. 2023 Mar 27;24(1):228. doi: 10.1186/s12891-023-06316-x.
Trigger thumb is a pathologic condition of the digital pulleys and flexor tendons. To find a cutoff value of the cross-sectional area ratio of specific parts of the flexor pollicis longus tendon to diagnosis trigger thumb in the high-frequency ultrasound examination.
We evaluated 271 healthy volunteers and 57 patients with clinical diagnosis of trigger thumb. The cross-sectional area of the metacarpophalangeal joint of flexor pollicis longus tendon (C1) and the cross-sectional area of the midpoint of the first metacarpal of flexor pollicis longus tendon (C2) were analyzed.
There is no difference between gender, age and left and right hands in the ratio of C1 to C2 (C1/ C2). The mean of C1/ C2 in the healthy thumb was 0.983 ± 0.103, which was significantly smaller in comparison to the diseased thumb (P < 0.05). Based on the receiver operating characteristic curve, we chose the diagnostic cut-off value for the C1/ C2 to be 1.362 and 1.153 in order to differ a trigger thumb from children and adults.
The C1/ C2 of the healthy thumb was relatively stable, with a mean value of 0.983 ± 0.103. The cutoff value of C1/C2 to distinguish healthy thumb from diseased thumb in children and adults were 1.362 and 1.153, respectively.
弹响拇是一种发生于屈指腱鞘和屈肌腱的病变。目的：寻找高频超声检查中拇长屈肌腱特定部位横截面积比值的截断值，以诊断弹响拇。
评估 271 名健康志愿者和 57 名临床诊断为弹响拇的患者。分析掌指关节处拇长屈肌腱横截面积（C1）和拇长屈肌腱近节指骨中点处横截面积（C2）。
C1/C2 的性别、年龄、左右侧差异均无统计学意义（P>0.05）。健康拇指的 C1/C2 平均值为 0.983±0.103，显著小于病变拇指（P<0.05）。根据受试者工作特征曲线，我们选择 C1/C2 的诊断截断值为 1.362 和 1.153，以区分儿童和成人的弹响拇。
健康拇指的 C1/C2 相对稳定，平均值为 0.983±0.103。区分儿童和成人健康拇指和病变拇指的 C1/C2 截断值分别为 1.362 和 1.153。
