an intracranial catheter

Abstract

The invention discloses an intracranial catheter comprising a tube body, a tapered buffer tube and a tube base, wherein the tube body is connected to the tapered part of the tube base, and the tapered buffer tube is sleeved on the proximal end of the tube body and the tube base. Outside the tapered part, the tube body includes a metal laser engraved pattern part, a spiral cutting part and a metal tube part connected in sequence. The advantage of this catheter is that since the tube body adopts the structure combining the metal laser engraving pattern part, the spiral cutting part and the metal tube part, its axial shrinkage is relatively small, which not only ensures the flexibility of the distal end and the cavity of the tube, but also improves the flexibility of the catheter. Synchronization of near-end and far-end operations.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intracranial catheter. Background technique [0002] Intravascular devices such as catheters are frequently used in the medical field. Catheters are typically inserted into a patient's femoral artery, radial artery, carotid artery, or jugular vein and passed through the patient's blood vessels to reach the heart, brain, or other target anatomy. Typically, a guidewire is first guided to the target anatomy, and one or more catheters are then passed over the guidewire and guided to the target anatomy. Once in place, the catheter may be used to deliver drugs, stents, embolic devices, radiopaque dyes, or other devices or substances used to treat the patient in the desired manner. In other cases, the catheter and guidewire are simultaneously delivered toward the target anatomy while the guidewire is within the catheter, and then the guidewire is delivered further into the anatomy by...

AI Technical Summary

Problems solved by technology

In addition, the polymer layer of the tube body at the distal end of the catheter is made of soft and elastic polymer materials, such as block polyether amide resin, thermoplastic polyurethane elastomer rubber, etc., which makes the distal tube body of the catheter more flexible during clinical use. , when the resistance at the distal end is high, the distal tube of the catheter will be stretched and deformed, resulting in the loss of the lumen and difficulty in positioning the distal end of the catheter

At the same time, the buffer tube can play a buffering role, but it still needs to be a separate structure with the catheter base and the tube body, and it is used in conjunction with it

Because it is a matching assembly, there are certain requirements for the fit between it and the tube body and the tube seat. If the fit is not good, for example, the gap between the tube body and the buffer tube is large, such as the buffer tube and the tube seat The fit at the farthest end is not tight enough, and there is a large gap. In the process of use, there will still be stress concentration at the proximal end of the tube, which will cause damage to the tube.

[0005] The present invention aims to provide an intracranial catheter, which can overcome the problems of poor coordination between the existing intracranial catheter and the tube seat, easy bending of the distal end, narrowing of the lumen, and poor synchronization of the proximal end and the distal end.

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