Banding self-ejection type intervention apparatus conveying system

Abstract

The invention relates to a binding self-propelled interventional device conveying system, belonging to the technical field of medical instrument; wherein, an internal pipe is sheathed in a middle pipe; the whole internal pipe passes through the middle pipe; the far end of the internal pipe is connected with a conical head; the near end of the middle pipe is connected with a handle connecting part; the far end of the middle pipe is provided with a position limit part; a side pipe is arranged in parallel with the middle pipe; the near end and the far end of the side pipe are the same with thoseof the middle pipe and are respectively connected with the handle connecting part and the position limit part; the near end of a binding wire is fixed on the middle pipe behind the position limit part and the other end thereof is bound on a pulling rod; the bracket is bound on the internal pipe between the conical head and the position limit head by a binding wire; the conical head is communicated with the internal chamber of the internal pipe; the pulling rod passes through the side pipe, the position part and the binding wire sequentially and is finally inserted into the conical head. The binding self-propelled interventional device cancels traditional sheath pipe typed conveying system, effectively reduces the external profile dimension of the conveyor, and improves the flexibility andexact positioning performance of the conveyor.

Description

technical field [0001] The invention relates to a delivery system in the technical field of medical instruments, in particular to a delivery system for binding self-elastic interventional instruments. Background technique [0002] Interventional therapy technology has been widely used in the medical field. In the early application, self-elastic interventional devices such as self-elastic stents mostly use catheter delivery system, that is, the interventional device to be implanted is put into the sheath, and the stent is sent out from the catheter and bounced off after being sent to the implantation site. . The disadvantages of this method: 1) because the interventional instrument needs to be pressed into the sheath tube and can be pushed out of the sheath at a long distance, the sheath tube must have a certain diameter, which increases the size of the delivery system. 2) The thicker size of the delivery sheath reduces the axial compliance of the delivery device, which mak...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: 1) Because the interventional instrument must be pressed into the sheath and can be pushed out of the sheath at a long distance, the sheath must have a certain diameter, which increases the size of the delivery system

2) The thicker size of the delivery sheath reduces the axial compliance of the delivery device, making it difficult to reach the ideal site or cause damage to organs

3) It is easy to cause the stent to shift during the process of pushing the instrument out of the sheath

These two patents both propose a delivery device that binds the stent with wires, but there are still certain shortcomings: ZL01266548.7 fails to get rid of the structure of the double-layer catheter, which makes the delivery catheter relatively hard and lacks axial flexibility

Both handles are too simple to create separate channels for guide wire and drug and contrast media

In addition, there is a risk of entanglement in long-distance cables

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