探讨髋关节外展锻炼对Graf Ⅱa型髋关节患儿的近期干预效果。

选取2017年1月至2017年6月在海盐县妇幼保健院出生并应用超声静态Graf法诊断为Graf Ⅱa型髋关节78例患儿（90髋）为研究对象，将患儿随机分为干预组41例（47髋）和对照组37例（43髋），干预组采用髋关节外展锻炼，对照组不给予外展锻炼，1~2月后复查超声并对比两组婴儿髋关节骨顶角（α角）发育改善情况。干预组及对照组组间及组内患儿的初查年龄、复查年龄、复查间隔、初查骨顶角度、复查骨顶角度、改善骨顶角度比较采用t检验，患儿性别比组间比较采用χ²检验。

干预组及对照组骨顶角α角均较前增加，差异均有统计学意义（t=12.71、13.63，P均<0.001），且干预组骨顶角α角增加幅度高于对照组，差异有统计学意义（t=2.219，P=0.029）。两组患儿性别比、初查年龄、复查年龄、复查间隔一般资料比较，差异均无统计学意义（P均>0.05）。

与自然转归相比，髋关节外展锻炼近期能更好地促进Graf Ⅱa型髋关节发育成熟。

To analyze short-term effects of hip abduction exercise on Graf type IIa hip joint in infants.

A total of 78 infants born at Haiyan County Maternal and Child Health Hospital from January 2017 to June 2017 were diagnosed with Graf type II a hip joints (90 hips) by ultrasound using the static Graf method. They were selected and randomly divided into either an intervention group (n=41, 47 hips) or a control group (n=37, 43 hips). The intervention group was treated by hip abduction exercise, while the control group did not. After 1~2 months, ultrasound examination was performed to compare the improvement of the α angle in the two groups. The Student′s t-test was used for comparing the age at initial examination, age at reexamination, interval of reexamination, initial α angle, α angle at reexamination, and the improvement of the α angle between the intervention group and the control group. The χ² test was used to compare the sex ratio of the infants between the two groups.

The α angle increased in both the intervention group and control group (t=12.71 and 13.63, respectively, P<0.001), and the improvement of α angle in the intervention group was more significant than that in the control group (t=2.219, P=0.029). There were no significant differences in the gender ratio, age at initial examination, age at reexamination, or interval of reexamination between the two groups (P>0.05).

Compared with the natural outcome, hip abduction exercise can promote Graf IIa hip joint maturity in the short term.