下肢软组织锐器伤低场MRI表现

Low field MRI findings of the sharp instrument injury in the lower limb soft tissue

目的:分析下肢软组织锐器伤低场MRI表现。方法:对临床证实的31例下肢软组织锐器伤患者的0.35T MRI资料进行回顾性分析。结果:MRI诊断肌腱、韧带损伤10例14个韧带(其中5个跟腱损伤,3个髌韧带损伤,股四头肌肌腱损伤2个,髂胫束损伤2个,内外侧副韧带损伤各1个),表现为肌腱韧带局部高信号4个、连续性中断10个,多伴邻近软组织肿胀;肌肉挫裂伤及血肿14例,表现为与锐器通道一致的皮下及肌肉水肿,肌肉筋膜撕裂,多伴肌间隙积液,伴血肿者表现为肌肉内团块状病变;皮下疏松组织间隙锐器刺伤7例,表现为与锐器通道一致的T1低信号T2高信号区域。结论:MRI是评价下肢软组织锐器伤重要的无创性检查方法,值得临床应用。

Objective： To analyze the low field MRI findings of the sharp instrument injury in the lower limb soft tissue. Methods： The low-field MRI data of 31 patients with the sharp instrument injury in the lower limb soft tissue were retrospectively analyzed. Results：Five cases of achilles tendon injury,3 cases of patellar ligament injury,2 cases of quadriceps tendon injury,2 cases of iliotibial band injury,1 case of medial collateral ligament injury and 1 case of lateral collateral ligament injury were diagnosed using MRI. MRI imagings of tendon ligament showed local high signal in 4 cases and discontinuity in 10 cases,together with adjacent soft tissue swelling. The imaging of 14 cases with muscle contusion and hematoma showed the subcutaneous and intramuscular edema,muscle fascia and muscle tear,together with muscle interstitial fluid and intramuscular nodular lesions in hematoma case. The imaging of 7 cases with sharp injury in subcutaneous loose connective tissue space showed low T1 and high T2 signal regions,which was consistent with injury.Conclusions： MRI is an important non-invasive examination method to evaluate the sharp instrument injury of the lower limb soft tissue.