Interventional medical instrument conveying system smooth in conveying

Abstract

The invention provides an interventional medical instrument conveying system smooth in conveying. The system comprises a conveyor and a loader; the conveyor comprises a conveying sheath tube and a sheath tube seat connected to the near end of the conveying sheath tube; the loader comprises a loading tube, the far end of the loading tube is detachably connected with the sheath tube seat, and a connecting through hole extending in the axial direction of the sheath tube seat is formed in the sheath tube seat so as to achieving communicating between the loading tube with the conveying sheath tube,the connecting through hole comprises a reducing hole section, the hole diameter of the reducing hole section is gradually reduced from the near end to the far end, and the far end face of the loading tube extends into the reducing hole section from the near end of the connecting through hole; and a radial gap is formed between the far end face of the loading tube and the corresponding part of the reducing hole section. The interventional medical instrument conveying system can convey interventional medical instruments smoothly, and the requirement for assembling the loading tube and the sheath tube seat in the system is reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an interventional medical instrument delivery system with smooth delivery. Background technique [0002] Minimally invasive interventional procedures are becoming more and more widely used in clinical applications. The delivery system of intracavitary interventional medical devices (such as left atrial appendage occluders, vascular plugs, filters, etc.) usually includes conveyors, expanders, loaders, pushers (such as Cable) and other parts, wherein the conveyor includes a delivery sheath and a sheath seat. The delivery sheath and dilator first establish a channel, then withdraw the dilator, put the interventional medical device into the loader through the pusher, then connect the sheath holder and the loader, and introduce the interventional medical device into the delivery sheath through the pusher until Delivery of interventional medical devices to targeted locatio...

AI Technical Summary

Problems solved by technology

However, in the actual connection and fitting process, on the one hand, the operator tends to overtighten the screw thread so that the distal end surface of the loading tube B and the stepped surface A11 of the stepped hole A10 in the sheath tube seat A are excessively docked, resulting in excessive abutment of the loading tube B. The nozzle at the distal end of B is narrowed, causing the interventional medical device in the loading tube B to pass through the place smoothly, and the transportation is stuck. It may also be caused by the excessive resistance of the interventional medical device when passing through the nozzle at the distal end of the loading tube B. The device is damaged; on the other hand, if the distal end of the loading tube B is not in place with the stepped surface A11 of the stepped hole A10, that is, there is an axial gap between the stepped surface A11 and the distal end of the loading tube B, some barbs will be caused. Structural interventional medical devices get stuck in the gap, hindering the push of the interventional medical device and increasing the risk of barb breakage

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