AIM: To detect the amount of heavy metals and As salt in Dangyao Tablets. METHODS: The method for detecting the heavy metals and As salt in volume 1 of 2000 China Pharmacopoeia. RESULTS: The(amount) of heavy metals in 15 batches of Dangyao Tablets was little less than 20.0 mg/g;As salt was little less than 2.0 mg/g. CONCLUSION: The amount of heavy metals and As salt in Dangyao Tablets is in the limit of the standard.

As a knee-sparing procedure, high tibial osteotomy involves closed osteotomy and open osteotomy. Medial opening wedge high tibial osteotomy (OWHTO) is currently the mainstream operation for osteotomy and orthopedics due to its relative simplicity in operation and limited postoperative complications. However, insufficient attention has been paid to the risk of postoperative deep vein thrombosis of lower extremity after OWHTO. This literature review attempts to analyze the mechanism, incidence, risk factors, prevention and treatment strategies of deep vein thrombosis of lower extremity after OWHTO, hoping to provide reference for clinical treatment of the condition.