Interventional medical apparatus conveying system

Abstract

The invention discloses an interventional medical apparatus conveying system which comprises a loader provided with a loading pipe, a conveying guide tube, a dilator, a propeller and a bleeding stop valve. A limiting and locking joint is arranged on the loading pipe or the conveying guide tube; a proper screw-in control mechanism for loading a screwing degree at the far end of the loading pipe and the near end of the conveying guide tube is arranged outside the loading pipe or the conveying guide tube; the near end of the conveying guide tube and the far end of the loading pipe are inserted into each other and are closed and are fixed together by the limiting and locking joint in a screw joint manner; one direction of the proper screw-in control mechanism rotates properly to be screwed and fixed and rotate reversely to relieve screw joint. The invention provides the interventional medical apparatus conveying system which is simple in structure and easy to operate and automatically determines the screw-in degree.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to an interventional medical device delivery system. Background technique [0002] Minimally invasive interventional surgery is becoming more and more widely used in clinical applications. The delivery system of endovascular interventional devices (such as occluders, vascular plugs, filters, etc.) usually includes at least a delivery sheath, dilator, loader, hemostatic valve and pusher ( For several parts such as steel cables), the delivery sheath and the dilator establish a channel, the dilator is withdrawn, the interventional device is put into the loader through the pusher, and then introduced into the delivery catheter for further delivery to the targeted location. During the process of introducing interventional instruments from the loader into the delivery catheter, the connection between the loader and the delivery catheter is very important. This position requires that...

AI Technical Summary

Problems solved by technology

[0003] The loader and the delivery catheter are usually connected by threads. The distal end of the loading tube of the loader is connected to the connector of the delivery catheter through threads. Through continuous screwing of the threads, the distal end of the loading tube is pressed against the proximal end of the delivery catheter. The degree of progress is not enough, the connection between the distal end of the loading tube and the proximal end of the delivery catheter is not in place, there is a gap in the connection position, and the interventional device is easy to get stuck when pushing, especially for structures with barbs or monofilament ends, if pushed forcibly, serious It can cause deformation or breakage of the device, which will lead to the failure of the operation. In addition, if there is a gap in the connecting position, the loader and the delivery catheter cannot be kept sealed. During the process of exhausting the device through the hemostatic valve, the delivery system will easily be exhausted air embolism

[0004] In clinical practice, in order to achieve a seamless connection between the distal end of the loader and the proximal end of the delivery catheter, and a smooth transition between the lumens of the two, while ensuring that the connection between the distal end of the loader and the proximal end of the delivery catheter is sealed to reduce the risk of air embolism , Doctors often tend to screw in too much thread, but if the degree of screwing is excessive, the distal end of the loading tube of the loader is easily squeezed and deformed, resulting in a shrinkage effect, resulting in a smaller inner diameter of the distal end of the loading tube, making it difficult for instruments to pass through , if pushed forcibly, it may seriously cause deformation or breakage of the instrument, and then cause the failure of the operation

If the degree of screwing is not enough, the connection between the distal end of the loading tube and the proximal end of the delivery catheter will not be in place, and there will be a gap in the connection position, and the interventional instrument will easily get stuck when pushing, and at the same time, air embolism will be caused due to poor exhaust; the above structure cannot To determine whether the device has been assembled in place, the doctor needs to operate with experience

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