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

technical field [0001] The invention belongs to the field of interventional medical devices, and in particular relates to a puncture device and an anchoring device. Background technique [0002] In special lesions such as the aortic arch, celiac trunk, bilateral renal arteries, or superior mesenteric artery, the use of covered stents will affect the blood supply of arterial branch vessels. Fenestration of the covered stent in situ during the operation by energy or mechanical means, so that the covered stent produces the expected hole, and then the branch stent is delivered to the hole and docked with the covered stent, which can overcome the impact of the treatment plan on the branch blood vessels of the human body Anatomical dependence. [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 t...

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 inside of the stent under the force of the puncture needle, the distance between the distal end of the puncture needle and the opposite side film and the vessel wall is very small. If the operator provides too much puncture force, the puncture needle will Continues to advance after a successful puncture, resulting in a higher likelihood of the needle puncturing the contralateral membrane or vessel wall

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