Mid- and long-term therapeutic observation of DENALI filter in a single-center

Objective To evaluate the mid- and long-term efficacy and complications of DENALI filter implantation. Methods Thirty-eight patients who underwent DENALI filter implantation from November 2011 to November 2018 in Beijing Shijitan Hospital affiliated to Capital Medical University were retrospectively reviewed and the perioperative complications and filter removal were summarized. Results A total of 38 patients in this group had successful operation, and 1 case of filter tilt occurred during operation, and no other complications occurred. The operation time was 20 minutes to 40 minutes with an average of (29.74 ± 4.24) minutes. The follow-up period ranged from 1 month to 26 months, with an average of (13.4±7.0) months. There was no new deep vein thrombosis and symptomatic pulmonary embolism (PE) during the follow-up period, and no inferior vena cava occlusion caused by the filter. 25 cases of filter were retrieved after operation, the retrieval rate was 65.8%, the retrieval success rate was 100%, the shortest indwelling time was 22 days, the longest was 393 days, the average was (127.7±83.1) days, 3 cases were difficult to retrieve, and the retrieval time was 30 minutes to 330 minutes, average (81.6±66.7) minutes. Conclusions As a new type of retrievable filter, DENALI filter has the advantages of long retrievable time window, less complications and high success rate of retrieval, which can effectively prevent the occurrence of PE. Key words: Deep vein thrombosis; DENALI filter; Pulmonary embolism