糖尿病足患者足底神经CT形态特点及其临床意义

摘要

Objective To analyze CT morphologicl characteristics of tibial nerve,lateral and medial plantar nerves and their clinical significances in the diabetic foot (DF) patients.Methods Bilateral feet (DF group) of 33 patients diagnosed as type 2 diabetes mellitus with DF were examined with CT.Meanwhile,36 uninjured feet (NDF group) of patients with single-side foot wound were taken as the controls.CT findings of distal part of tibial nerve,medial plantar nerve and lateral plantar nerve on the same plane were observed with CT post-processing technique.The morphological measurements were done at the points of A1 (tibial nerve measuring position),A2 (proximal part of medial plantar nerve measuring position),A3 (distal part of medial plantar nerve measuring position) and A4 (lateral plantar nerve measuring position).Both of the anteroposterior and transverse diameters were measured and compared between DF and NDF groups.Results Plantar nerves (tibial nerve,medial plantar nerve and lateral plantar nerve) of DF patients were thick (52/66,78.79 ％),and the edges of nerve were indistinct (51/66,78.78％).The anteroposterior and transverse diameters of measurement points A1,A2 and A4 in DF group were larger than those in NDF group (all P＜0.01).There was no statistical difference of the anteroposterior and transverse diameters of point A3 between the two groups (both P＞0.05).Conclusion The plantar nerves of DF patient were thick with indistinct edges.The observation of continuous morphological characteristics and the diameter measurements of the plantar nerve can be performed with CT post-processing technique,which can provide more information for clinical diagnosis of DF.%目的 分析糖尿病足(DF)患者胫神经、足底内侧神经及足底外侧神经CT形态特点及其临床意义.方法 对33例2型糖尿病并发DF患者共66足(DF组)行CT检查,并与年龄、性别匹配的36例(36足)单侧足部创伤患者的非创伤侧足(NDF组)进行对照.通过CT后处理技术观察同层胫神经远端、足底内侧神经及足底外侧神经的形态,并分别测量A1(胫神远端测量点)、A2(足底内侧神经近端测量点)、A3(足底内侧神经远端测量点)及A4点(足底外侧神经测量点)相应神经前后径及左右径.比较2组间各测量点前后径及左右径的差异.结果 DF足底神经(胫神经远端、足底内侧神经神经、足底外侧神经)增粗(52/66,78.79％),神经边缘模糊(51/66,78.78％).DF组测量点A1、A2、A4前后径及左右径均大于NDF组(P均＜0.01),2组间测量点A3前后径及左右径差异均无统计学意义(P均＞0.05).结论 DF足底神经增粗、模糊;应用CT后处理技术可完整连续地显示神经形态,并测量神经径线,为临床诊断DF提供更多影像学依据.