Comparing anticoagulant therapy alone,anticoagulant therapy in combination with catheter-directed thrombolysis,and anticoagulant therapy in combination with pharmacomechanical catheter-directed thrombolysis in the patients with optional inferior vena cava filter-related thrombosis: A single-center retrospective study

Abstract

Objective

To analyze the treatment methods and efficacy of inferior vena cava filter thrombosis (IVCFT).

Materials and methods

In this retrospective study, the clinical data for 47 patients with IVCFT who underwent sequential treatment at the Department of Vascular Surgery, Tianjin Medical University Second Hospital, from January 2020 to January 2023 were analyzed. Patients were divided into three groups according to the treatment method: anticoagulant therapy (AC group), anticoagulation plus catheter-directed thrombolysis (CDT group), and anticoagulation plus AngioJet thrombectomy plus catheter-directed thrombolysis (PCDT group). The evaluation criteria for efficacy mainly included preoperative and postoperative clinical symptoms (Villalta score), thrombus diameter, thrombus clearance rate, filter retrieval rate, filter retention time, and urokinase dosage.

Results

This study included 47 patients, of whom 31 were males (65.9%) and 16 females (34.1%), with a mean age of 72.05 ± 8.32 years. An Aegisy filter was used in seven patients, whereas an Illicium filter was used in forty patients. There were a total of nineteen patients in the anticoagulation-only group, with complete dissolution of the intraluminal thrombus in five patients, a residual thrombus with a maximum diameter ≤1 cm in three patients, and a residual thrombus with a maximum diameter >1 cm in eleven patients. The Villalta score was 7.16 ± 0.6 before treatment and decreased to 3.79 ± 0.59 after treatment. The thrombus diameter decreased from an average of 1.46 ± 0.2 cm before treatment to an average of 0.85 ± 0.14 cm after treatment. The retrieval rate for the filters was 42.11% (8/19), with an average dwell time of 27.4 ± 1.3 days for the filters. The CDT group consisted of 17 patients. Among whom we observed, complete dissolution of the intraluminal thrombus was observed in six patients, residual thrombus with a maximum diameter ≤1 cm in nine patients, and residual thrombus with a maximum diameter >1 cm in two patients. The Villalta score decreased from 7.53 ± 0.83 before treatment to 2.06 ± 0.39 after treatment. The thrombus diameter also decreased from 1.46 ± 0.16 cm before treatment to 0.35 ± 0.11 cm after treatment. The retrieval rate of the filters was 88.24% (15/17), and the average filter indwelling time was 19.25 ± 4.5 days. The PCDT group consisted of 11 patients. We observed complete dissolution of the intraluminal thrombus in four patients, residual thrombus with a maximum diameter ≤1 cm in six patients, and residual thrombus with a maximum diameter >1 cm in one patient. The Villalta score decreased from 7.45 ± 0.76 before treatment to 2.09 ± 0.55 after treatment. The thrombus diameter decreased from 1.50 ± 0.21 cm before treatment to 0.33 ± 0.35 cm after treatment, and the rate of filter retrieval was 90.91% (10/11).

Conclusion

The three treatments of anticoagulation therapy, CDT, and PCDT were meaningful for preoperative and postoperative thrombolysis and symptom improvement in patients with IVCFT. The application of CDT and PCDT was superior to anticoagulation therapy, while there was no significant difference between the CDT and PCDT group. The retrieval rate of filters in the anticoagulation therapy group was the lowest, with no significant difference between the CDT and PCDT group.

Keywords

Inferior vena cava filter anticoagulation catheter-directed thrombolysis thrombosis

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