Hemostatic valve, sheath tube and catheter sheath assembly

Abstract

The invention provides a hemostatic valve, a sheath tube and a catheter sheath assembly. The hemostatic valve comprises a valve body and a valve core arranged in the valve body, wherein the valve corecomprises a valve core main body and a cover body connected to the far end of the valve core main body; an axial through hole is formed in the valve core main body; and the cover body is opened or automatically closed relative to the valve core main body so as to correspondingly expose or close the axial through hole. The hemostatic valve is ideal in sealing effect, capable of preventing blood leakage or gas from entering a body, high in reliability and particularly suitable for being matched with an expander with a large diameter or other diagnosis and treatment instruments for use.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a hemostatic valve, a sheath tube and an catheter sheath assembly. Background technique [0002] As an auxiliary guiding device for peripheral and intracardiac minimally invasive interventional procedures, the catheter sheath plays an important role in percutaneous coronary intervention, percutaneous interventional closure, atrial septal puncture, etc. It establishes the connection between human blood vessels and the outside world. The connecting channel to assist the delivery system to deliver diagnostic and / or therapeutic instruments to the target lesion. The hemostatic valve is an essential part of the catheter sheath product. It is generally installed at the proximal end of the sheath tube to prevent blood loss, reduce bleeding, prevent air from entering blood vessels to form air embolism, and reduce complications for patients. [0003] In the prior art, the stru...

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Problems solved by technology

However, there is a relatively obvious defect in the hemostatic valve of this Luer opening structure: when a dilator or other medical instruments with a larger diameter need to be inserted into the hemostatic valve, the initial diameter of the central hole of the elastic member is correspondingly larger, so the Luer extrusion may not be able to shrink the central hole of the elastic member to completely close, therefore, this type of hemostatic valve has an unsatisfactory sealing effect, and the reliability of preventing blood loss is limited. It is used in conjunction with dilators or other medical devices with larger diameters There is still a risk of blood leakage or gas entering the body

However, there is also a relatively obvious defect in the hemostatic valve of this "x" or "ten" incision structure: when a dilator or other medical instrument with a larger diameter penetrates into the hemostatic valve, each penetrating otch The starting end and the tail end cannot completely fit on the outer peripheral surface of the dilator or other medical instruments; in addition, after penetrating and withdrawing the dilator or other medical instruments with a larger diameter into the hemostatic valve for many times, each penetrating incision In the natural state, it may not return to a completely closed state. Therefore, the sealing effect of this type of hemostatic valve is not ideal, and the reliability of preventing blood loss is limited. There is still a risk of blood leaking or gas entering the body

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