Handle and conveyor for realizing quick and slow release of interventional stent

Abstract

According to a handle and a conveyor for achieving quick and slow release of an interventional stent, by arranging a screw rod, a screw rod sleeve and a cam ring quick and slow switching mechanism, slow and quick release and convenient switching of the stent can be achieved. No matter which release state the handle is in, a reed of a telescopic tooth plate of the cam ring fast and slow switching mechanism always jacks a tooth plate to the deep arc-shaped groove position or the shallow arc-shaped groove position, so that the tooth plate can switch fast and slow release states only when the cam ring is manually shifted, and the whole handle is safe and reliable to use. A clamping hook and a clamping ring can be separated and unlocked by pressing a button on an arc-shaped clamping sleeve, so that a sheath tube and a guide head can be separated; after the interventional stent is released, the arc-shaped clamping sleeve, the clamping hook and the clamping ring are withdrawn to be hooked and locked again, so that when the whole conveyor is withdrawn, the guide head and the rear release mechanism cannot be separated from the sheath tube, a situation that the rear release mechanism scratches the intima is avoided, and a situation that the sheath tube, the rear release mechanism and the guide head are suddenly changed in size and difficult to operate when being withdrawn from the femoral artery incision in sequence is avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a handle and a conveyor for realizing fast and slow release of an interventional stent. Background technique [0002] Aortic dissection is an acute aortic disease with a dangerous condition, rapid progress and high mortality, and its incidence accounts for about 5% to 20% of the general population. For lesions confined to the descending aorta, interventional stent-graft surgery is the main treatment option in clinical practice, that is, the stent-graft is pressed and held in the transporter, and is delivered along the guide wire through the femoral artery puncture / incision approach. At the lesion site, the outer sheath of the delivery device is withdrawn, and the stent graft is self-expanding and opens, attaching to the vessel wall, and isolating the blood flow in the aortic dissection or tumor cavity to achieve the purpose of treatment. [0003] The aortic stent graft s...

AI Technical Summary

Problems solved by technology

[0006] At present, the conveyor handle with fast and slow release functions requires the operator to visually confirm the position of the handle due to the directional switching method, and sometimes needs to rotate the handle until the switch button is in the ideal operating position, which seriously interferes with the operator's observation of the video screen

And the handle does not have a locking function, which cannot guarantee the stability during transportation and the relatively fixed positions of the outer sheath, TIP head and core tube during withdrawal

Images