Deep Venous Thrombosis
Conditions
Keywords
Filter Tilt, Preventional efficiency, Günther Tulip filter, Transfemoral Approach
Brief summary
It has been demonstrated that implantation of inferior vena cava filter was safe and effective in the prevention or reduction of fatal pulmonary thromboembolism in numerous clinical researches. When acute deep venous thrombosis need transcatheter thrombolysis, transfemoral Günther Tulip Filter implantation could avoid catheter across the Günther Tulip Filter. Although incidence of significant filter tilting (\>10°) is not high (13%-16%), severe tilting of the Günther Tulip Filter may be associated with difficulty or sometimes impossibility of retrieval. It has been reported that a simple technique of keeping tension of the delivery system may prevent significant tilting of the transjugular Günther Tulip Filter in an in-vitro study. But no clinical study of prevention transfemoral Günther Tulip Filter from tilting has been reported. The investigators conducted a randomized, controlled study to test whether the introducer curving technique is useful to decrease the extent of tilting of transfemoral Günther Tulip Filter.
Detailed description
The study was designed as a double-blind randomized controlled trial, with research assessors and patients intended to be blind to the intervention status. The staff members performing the assessment were not involved in implementing any aspect of the intervention. 108 patients were randomized to accept curving introducer Günther Tulip Filter and transcatheter thrombolysis or straight introducer Günther Tulip Filter and transcatheter thrombolysis. The assessments include the tilting angle between the axes of inferior vena cava and Günther Tulip Filter after implantation; the tilting angle between the axes of inferior vena cava and Günther Tulip Filter before retrieval; the fluoroscopy time of Günther Tulip Filter retrieval; the rate of retrieval hook adhering vascular wall; the success rate of retrieval.
Interventions
DEVICEcurving introducer Günther Tulip Filter
The Günther Tulip filter (Vena Cava MReye Filter Set; William Cook Europe, Bjaeverskov, Denmark) The amplitude of introducer curvature was 5°-15° less than the angle between the inferior vena cave axis and the approached iliac vein axis and the distance between the vertex of the curved angle and the hook of the filter was 2-4cm less than the distance between the level of the renal vein confluence and the furcation of inferior vena cave.
DEVICEstraight introducer Günther Tulip Filter
The Günther Tulip filter (Vena Cava MReye Filter Set; William Cook Europe, Bjaeverskov, Denmark)
Sponsors
China Medical University, China
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Caregiver, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
* acute lower extremity deep vein thrombosis, diagnosed by vascular ultrasound and clinical history
Exclusion criteria
* both lower extremities deep vein thrombosis * Inferior Vena Cava thrombosis * refractory hypertension (blood pressure \> 180/110mmHg) * contraindication of thrombolysis * the diameter of Inferior Vena Cava \> 35mm or \< 14mm * Inferior Vena Cava venous anomalies
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| the tilting angle between the axes of Inferior Vena Cava and Günther Tulip Filter after implantation | just after filter implantation （up to 24 hours） |
Secondary
| Measure | Time frame |
|---|---|
| the tilting angle between the axes of Inferior Vena Cava and Günther Tulip Filter before retrieval | just before filter retrieval （up to 90 days） |
| the fluoroscopy time of Günther Tulip Filter retrieval | just after filter retrieval（up to 90 days） |
| the rate of retrieval hook adhering vascular wall | just after filter retrieval（up to 90 days） |
| the success rate of retrieval | just after filter retrieval（up to 90 days） |
Countries
China
Outcome results
None listed