Puncture device and anchor device

Abstract

The invention discloses a puncture device, which comprises a puncture needle, an expandable anchor balloon and a catheter. The catheter penetrates a near end and a far end of the anchor balloon, and the puncture needle is movably stored in the catheter. In a full state, a center area of the far end of the anchor balloon is recessed towards the near end to form a recessed area, and a far end of thecatheter is positioned in the recessed area. The invention further discloses an anchor device which comprises the anchor balloon and the catheter. By the puncture device, puncture accuracy is improved while the puncture success rate is increased, and after finishing of puncture, an expanding balloon can be conveyed along a guide wire to expand a puncture port only by retreating of the puncture needle and a push rod. In addition, since a far end of an anchor component is abutted against a punctured area, the probability that the puncture needle continues moving forwards to puncture opposite tectorial membrane or blood vessel wall after success of puncturing is decreased.

Description

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AI Technical Summary

Problems solved by technology

[0003] However, the existing mechanical fenestration devices have the following defects: (1) When the puncture needle touches the covering film of the stent, due to the flexibility of the covering film, the covering film will sag toward the inside of the stent, which may cause the puncture needle to bend or fall on the surface of the film. Slipping; (2) When the film is depressed toward the insid

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