Intermediate catheter

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.

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...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the structure of most intermediate catheters, the proximal push force is insufficient and the distal torque response is insufficient. As a result, the distal end of the catheter can only be delivered to the cervical or rock segment of the neck, and cannot pass through the cavernous sinus segment of the neck. Reaching farther locations, such as the M1 segment of the middle cerebral artery with a high incidence of stroke, this limitation also relatively affects the use of the intermediate catheter

Images