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目的探讨睾丸扭转超声造影环状增强的机制。方法 18只雄性新西兰家兔随机分为对照组、鞘膜外扭转组及鞘膜内扭转组(n=6),后两组分别于鞘膜层内及鞘膜层外注入适量耦合剂制作成不同的模型,均用超声造影进行观察。结果鞘膜外扭转组和鞘膜内扭转组均显示环状增强,而对照组无环状增强;鞘膜内扭转组环状增强明显强于鞘膜外扭转组;鞘膜内扭转组的鞘膜层环状增强明显强于阴囊皮肤肌肉层;鞘膜外扭转组阴囊皮肤肌肉层显示较弱环状增强,而鞘膜层未见增强。结论睾丸扭转超声造影环状增强主要来源于睾丸鞘膜层,少量来源于阴囊皮肤肌肉层;环状增强的强弱有助于鉴别鞘膜内或鞘膜外睾丸扭转。
Objective To explore the mechanism of circular enhancement of testicular torsion contrast-enhanced ultrasound. Methods Eighteen male New Zealand rabbits were randomly divided into control group, intrathecal group and intrathecal torsion group (n = 6). The latter two groups were injected with proper amount of coupling agent into the sheath and the sheath Different models were observed with contrast-enhanced ultrasound. Results Both the extraversion of the sheath and the intrathecal torsion group showed an annular enhancement, while the control group showed no annular enhancement. The annular enhancement in the intrathecal torsion group was significantly stronger than that in the extrahepatic torsion group. The sheath of the intrathecal torsion group The annular enhancement of the layer was significantly stronger than that of the scrotal skin muscle layer. The scrotal skin muscle layer showed a weaker annular enhancement in the extraversion sheath group, but no enhancement in the sheath layer. Conclusions Torsional contrast-enhanced ultrasound is mainly originated from the testicular sheath and a small amount from the scrotal skin muscular layer. The strength of annular enhancement may help to identify the intraspuricular or extradural testicular torsion.