Current clinical practice guidelines lack explicit guidance on the indications and appropriate timing of venous ultrasound (US) in lower extremity deep vein thrombosis (DVT) follow-up. Moreover, abnormal findings reported on venous US in DVT follow-up or suspected recurrent DVT may be difficult for clinicians to interpret, which carries risk of harm from inappropriate use of anti- coagulation and increased healthcare resource utilization. Due to the above factors, over-use of ultrasound in diagnosis and follow-up of lower extremity DVT has been reported in western health systems. We have undertaken a case-based discussion and a scoping review of existing guidelines on the use of venousUS following prior diagnosis of DVT, to guide appropriate interpretation of commonly reported US abnormalities and provide our suggestions in the light of best available evidence on appropriate timing to perform follow-up US in management of lower extremity DVT.

中文翻译：

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静脉超声在下肢深静脉血栓（DVT）诊断及随访中的临床应用：以病例讨论

目前的临床实践指南缺乏对下肢深静脉血栓（DVT）随访中静脉超声（US）的适应症和适当时机的明确指导。此外，DVT 随访中静脉超声报告的异常结果或疑似复发性 DVT 可能难以让临床医生解释，这会带来因抗凝剂使用不当和医疗资源利用率增加而造成伤害的风险。由于上述因素，西方卫生系统已报告在下肢 DVT 的诊断和随访中过度使用超声。我们对先前诊断 DVT 后使用静脉超声的现有指南进行了基于病例的讨论和范围审查，以指导对常见报告的超声异常的适当解释，并根据最佳可用证据就适当时机提供我们的建议。对下肢 DVT 的治疗进行随访超声检查。