Objective To analyze the protection efficacy of the vena cava filter from pulmonary thromboembolism and report the problems and complications afterfilter placement.
目的评价腔静脉滤器对肺动脉栓塞的预防效果、使用中的问题和并发症。
2
By use of the theory of afterfilter, the problems of selecting new boundary point when several points border upon each other and symmetrical combination for outline points are analyzed.
The rule that we previously examined is about as simple as a rule can get. It queries for only a single type of node in the AST tree and blindly reports all results remaining afterfilter.