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目的研究足C征的临床X线诊断作用。方法观察773例因外伤或疼痛就诊的标准踝部CRX线片,其中男565例,女208例,年龄10~81岁,踝外伤630例,踝疼痛143例。研究C征检出率、C征形态、跟距内关节间距和跟骨载距突的形态,分析C征与跟距联合的关系。结果773例C征检出54.6%(422/773),女性检出61.1%(127/208),多于男性检出52.2%(295/565)(P<0.05)。连续C征0.47%(2/422),非连续99.53%(420/422)。跟距内关节距离<1.9mm占7.3%(31/422),≥2.0mm92.1%(389/422),间距消失者0.47%(2/422)。C征与外伤、疼痛和年龄无关(P>0.05)。跟距联合发生率7.0%(54/773),其在阳性C征中发生率为12.3%(52/422),在阴性C征中仅为0.6%(2/351)。C征阳性者载距突下陷达67.5%(285/422)。结论C征在国人常见,女多于男,在诊断跟距联合畸形时阳性C征者明显高于阴性C征者。
Objective To study the clinical X-ray diagnosis of foot C sign. Methods A total of 773 CRX linear ankle cases treated by trauma or pain were observed. There were 565 males and 208 females, aged 10-81 years, 630 with ankle trauma and 143 with ankle pain. To investigate the detection rate of C signs, morphology of C signs, the shape of the distance between the articular joints and the distance between the calcaneus and the distance between the C signs and the heel joint. Results A total of 773 cases of C were detected in 54.6% (422/773) of women, 61.1% (127/208) of women were detected, more than 52.2% (295/565) in men (P <0.05). Continuous C sign 0.47% (2/422), non-continuous 99.53% (420/422). With the distance from the internal joint <1.9mm accounted for 7.3% (31/422), ≥ 2.0mm92.1% (389/422), distance disappeared 0.47% (2/422). C signs and trauma, pain and age (P> 0.05). Followed by a combined incidence of 7.0% (54/773), the incidence of positive C sign was 12.3% (52/422), in the negative C sign was only 0.6% (2/351). Positive sign of C sign up 67.5% (285/422). Conclusion C sign is common in people, more women than men, with a diagnosis of positive deformity with C-positive sign was significantly higher than negative C sign.