Department of Medical Imaging, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, People's Republic of China.
Department of Ultrasound, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324, Jing-wu Road, Jinan, Shandong, 250021, People's Republic of China.
Pediatr Radiol. 2022 Jul;52(8):1521-1527. doi: 10.1007/s00247-022-05334-6. Epub 2022 Mar 25.
To compare pubo-femoral distance (PFD) in normal hips and those treated for developmental dysplasia of the hip (DDH) and to investigate the value of ultrasonography from the medial hip in early follow-up of dislocated DDH after reduction.
This study included 58 infants (49 females) with DDH who presented with 65 dislocated hips (51 unilateral and 7 bilateral). Dislocation was treated by closed reduction for 53 and open reduction for 12 hips. Ultrasonography on the medial side of the hip was performed within 1-2 weeks and 4 weeks after reduction. The distance from the pubic bone to the femoral head (PFD) was measured to assess the reduction and stability of the femoral head and compared to that on the contralateral side (control) in cases of unilateral DDH.
The PFD value for the normal group (2.9 ± 0.4 mm) was significantly less than that for the closed reduction group (4.9 ± 2.8 mm, P<0.001) and that for the open reduction group (4.4 ± 1.6 mm; P=0.02), but no difference in the PFD was observed between the closed reduction and the open reduction groups (P=0.73). Despite successful reduction, the PFD values in the successful reduction group remained higher than those of the normal hips.
PFD measurement by ultrasonography of the medial hip can be used to evaluate the effectiveness of reduction procedures in DDH. The clinical implications of post-reduction ultrasound evaluation in the diagnosis and long-term follow-up of outcomes require further research.
比较发育性髋关节发育不良（DDH）患者治疗前后的耻骨股骨间距（PFD），探讨超声在髋关节内侧早期随访DDH 复位后髋关节脱位中的应用价值。
本研究纳入 58 例（49 例女性）DDH 患儿，共 65 髋脱位（51 例单侧，7 例双侧）。53 例采用闭合复位，12 例采用切开复位。复位后 1-2 周和 4 周内行髋关节内侧超声检查。测量从耻骨到股骨头的距离（PFD），评估股骨头复位和稳定性，并与单侧 DDH 对侧（对照组）进行比较。
正常组 PFD 值（2.9±0.4mm）明显小于闭合复位组（4.9±2.8mm，P<0.001）和切开复位组（4.4±1.6mm，P=0.02），但闭合复位组和切开复位组之间 PFD 值无差异（P=0.73）。尽管复位成功，但成功复位组的 PFD 值仍高于正常组。
髋关节内侧超声 PFD 测量可用于评估 DDH 复位术的效果。复位后超声评估在 DDH 诊断和长期随访中的临床意义需要进一步研究。
