Adjustable temporary venous spring filter: in vitro assessment
| Autor: | Frode L˦rum, Junro Hosaka, Knut Kvernebo, Ivar Enge, Sumit Roy |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
medicine.medical_specialty
Vena cava filters Vena Cava Filters business.industry Swine medicine.medical_treatment Models Cardiovascular Blood flow Equipment Design Spring (mathematics) Inferior vena cava medicine.anatomical_structure medicine.vein Intraluminal pressure medicine In vitro study Animals Humans Radiology Nuclear Medicine and imaging Radiology Vein business Pulmonary Embolism Saline Biomedical engineering |
| Zdroj: | Academic radiology. 4(7) |
| ISSN: | 1076-6332 |
| Popis: | Rationale and Objectives. The authors performed an in vitro study to evaluate a temporary venous spring filter that can extend vessels of a wide range of diameters to a slit-shaped canal. Materials and Methods. Filters were placed in thin polyethylene tubes or in porcine inferior vena cava specimens (diameter, 10.0–16.0 mm). Physiologic saline was substituted for blood flow, and blood clots of three sizes 6 × 10, 6 × 20, and 9 × 20 mm) were funneled to the filter. Clot-trapping ability was assessed by the degree of luminal extension. Results. When the luminal extension was increased from 2.6 r to 2.8 r (where r is the original radius of the vein models), clot-trapping ability increased significantly 61.1%–87.5% in polyethylene tubes and 15.8%–77.5% in venous specimens; P r , more than 90% of the clots were trapped in all tubes. After trapping the small, medium, and large clots, mean intraluminal pressure elevation was 1.0, 1.0, 17.0 cm of saline, respectively. Conclusion. Despite its simple design, the spring filter proved to be an efficient filtering device. |
| Databáze: | OpenAIRE |
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