Temporary inferior vena cava filter with no need of removing

Abstract

The invention relates to an inferior vena cava filter in medical devices, in particular to a temporary inferior vena cava filter with no need of removing. The problems are solved that an existing permanent inferior vena cava filter causes blocking of the inferior vena cava, and an existing inferior vena cava filter capable of being removed needs to be removed through a second operation. Accordingto the technical scheme, the temporary inferior vena cava filter is provided with a waved annular supporting ring supported on the inner wall of a blood vessel, a plurality of filter rods are arrangedaround a ring body of the supporting ring at intervals and axially stretches out, the stretching ends of the filter rods are gathered by a biodegradable silk thread to one position, and the filter rods with the gathered stretching ends form a filter screen for filtering thrombi. After the biodegradable silk thread is degraded to release the stretching ends, the filter rods recover the elasticityto make the filter rods axially attached to the inner wall of the blood vessel.

Description

technical field [0001] The invention relates to an inferior vena cava filter in a medical device, in particular to a temporary inferior vena cava filter which does not need to be taken out. Background technique [0002] Clinically, inferior vena cava filters have been widely used to prevent pulmonary embolism. At present, commonly used inferior vena cava filters include: permanent and removable inferior vena cava filters; permanent inferior vena cava filters, as the name suggests, once placed It cannot be taken out after the human body is in the body, but this kind of filter is easy to cause the blockage of the inferior vena cava for a long time in the body. The removable inferior vena cava filter can be put into the human body permanently or taken out at an appropriate time. Two types of inferior vena cava filters Venous filters are made of metal alloy materials. [0003] With the gradual understanding of the inferior vena cava filter by clinicians, the removable inferior ...

AI Technical Summary

Problems solved by technology

[0005] 1. Permanent inferior vena cava filter: It cannot be taken out, and it is always in a filtering state when it is in the body. Long-term placement in the body may easily lead to occlusion of the inferior vena cava, and the current usage is decreasing year by year

[0006] 2. The removable inferior vena cava filter can be permanently put into the human body for use, and can also be taken out at an appropriate time, so that patients and doctors have an additional choice, thereby avoiding the occurrence of complications caused by permanent insertion into the human body , but the removal of the removable inferior vena cava filter needs to be operated under X-ray, and it is an invasive operation, and the cost is high, which not only increases the X-ray radiation of the patient, but also increases the trauma and economic burden of the patient

[0007] Therefore, the above two inferior vena cava filters all have certain deficiencies.

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