Guide prolonged catheter

Abstract

The invention discloses a guide prolonged catheter and belongs to the technical field of medical instruments. The guide prolonged catheter consists of a prolonged tube body (1), a gradual change leadpart (5), a push rod (2) and a handle (3) which are sequentially fixedly connected from a far end to a near end, wherein the gradual change lead part (5) is a hollow circular truncated cone and is provided with an inner cavity of which the inner diameters are gradually changed in an axial direction; the near end of the prolonged tube body is fixedly connected with the far end of the gradual changelead part; the inner cavity of the prolonged tube body communicates with the inner cavity of the gradual change lead part; the inner diameter of the far end of the gradual change lead part is identical to that of the prolonged tube body; and the inner diameter of the near end of the gradual change lead part is greater than that of the far end of the gradual change lead part. According to the guide prolonged catheter, the gradual change lead part is additionally arranged at the near end of the prolonged tube body, so that seamless cooperation of the gradual change lead part with the inner cavity of a guide catheter can be achieved, phenomena that guide wires, balls and brackets are scrapped and blocked can be avoided, the operation efficiency can be improved, and the operation success ratecan be increased. The prolonged tube body is made of a multi-layer material compounding process, has good flexibility and inner cavity holding performance, and provides a stable conveying space for instruments such as balls and brackets.

Description

technical field [0001] The invention relates to a guiding and extending catheter, which belongs to the technical field of medical instruments. Background technique [0002] In recent years, percutaneous coronary intervention (PCI) technology has developed rapidly. PCI via the radial artery has the advantages of fewer complications, less patient pain, less trauma, shortened hospital stay, and improved clinical work efficiency. It has become the preferred approach for PCI surgery in many hospitals at home and abroad. However, transradial PCI also has certain limitations, such as insufficient support of the guiding catheter. When dealing with complex coronary lesions such as severe calcification, proximal distortion, or chronic occlusion, the balloon or stent cannot successfully reach the target lesion area due to insufficient support of the guiding catheter, and even the stent is deformed or unloaded. Especially when the lesion segment has been expanded or dissection exists,...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects in the design of the entrance of the distal end of the existing guiding and extending catheter, and provide a guiding and extending catheter that can avoid scratching and jamming of the guide wire, balloon, and stent

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