Intermediate catheter

A catheter and distal technology, applied in the field of intermediate catheters, can solve the problems that can only be transported to the neck or rock segment in the neck, affect the use of intermediate catheters, and insufficient torque response, etc., to achieve excellent radial support performance and shaft Optimizing push performance, radial rigidity and axial tensile strength, effect of reducing crystallinity

CN109173003APending Publication Date: 2019-01-11MINITECH MEDICAL JIANGSU LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-11

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Abstract

The invention provides an intermediate catheter comprising a seat, a stress relief tube and a catheter arranged from a proximal end to a distal end in sequence; the main improvement is that the catheter has a proximal push segment, a middle support segment, a distal torsional control segment and an ultra-distal tracking segment along the axial direction from proximal to distal. The catheter tip iscoaxially connected with the ultra-distal tracking segment; the bore of the seat is coaxially connected with the inner lumen of the catheter to form a guide lumen; an inn liner layer, an intermediatereinforcement layer and an outer cladding layer are radially distributed from the inner to the outer of the conduit, and the intermediate reinforcement layer is respectively connected with the innerliner layer and the outer cladding layer. The present invention is capable of providing superior proximal pushability, good midsection vascular support, high distal torque response torque control, andultra-distal complex tortuous vessel passage, facilitating catheter passage through distal intracranial vessels or delivery of other instruments to distal vessels.
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Description

technical field

[0001] The invention relates to an intermediate catheter, in particular to an intermediate catheter for diagnosing or treating cerebrovascular lesions through a nerve intervention method, and belongs to the technical field of medical devices. Background technique

[0002] Stroke, commonly known as "stroke" or "cerebrovascular accident", is an acute cerebrovascular disease. It is a disease of brain tissue damage caused by the sudden rupture or blockage of blood vessels in the brain, including ischemic and Hemorrhagic stroke. The incidence of ischemic stroke accounts for 60% to 70% of the total number of strokes. The most common cause of stroke is that there is a small embolus on the inner wall of the blood vessel in the brain, which leads to arterial embolism after falling off, that is, ischemic stroke. In patients with coronary heart disease and atrial fibrillation, the heart valves are prone to thrombus attached to the wall. After the embolus falls off, it...

Examples

Embodiment Construction

[0050] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0051] Such as figure 1 As shown, the intermediate catheter provided by the present invention includes a seat 1 , a stress relief tube 2 and a catheter 3 arranged in sequence from the proximal end to the distal end.

[0052] The catheter 3 is distributed from near to far along the axis with a proximal push section 301, a middle support section 302, a distal twist control section 303 and an ultra-distal tracking section 304; wherein the proximal end and the distal end of the ultra-distal tracking section 304 Each is provided with a developing ring 305 , and the catheter tip 4 is coaxially connected with the ultra-distal tracking section 304 ;

[0053] Such as figure 2 As shown, the length L6 of the proximal pushing section 301 is 50-100cm, the length L5 of the middle support end 302 is 20-50cm, the length L4 of the distal twist control section 303 is 5-18cm, ...