8 results about "Left vertebral artery" patented technology

The present application relates to the field of model construction, in particular to a kind of construction method of vertebral artery compression rat model, the inner diameter and blood flow velocity of normal rat vertebral artery are obtained by ultrasonic detection;Anesthetize rat, skin preparation, disinfection, incision, expose vertebral artery;According to the required compression degree, select the tissue clip of corresponding specification, fix on vertebral artery, keep vertebral artery in compression state;Suture incision, disinfection, bandage;After rat awakens, daily care, feed, until incision healing;Ultrasonic detection is carried out, the inner diameter and blood flow velocity of the vertebral artery of rat model are obtained, compared with the inner diameter and blood flow velocity of the vertebral artery of the same age healthy rat or rat before modeling, whether it meets the standard of successful modeling is judged.

The invention discloses an intracranial posterior circulation vascular stenosis functional evaluation method and system, electronic equipment and a computer readable storage medium, and provides a vascular stenosis functional evaluation method based on bilateral blood flow conditions by fully considering the combined action of intracranial bilateral vertebral arteries on blood flow supply. The problem that in the prior art, only one side vertebral artery is considered to conduct vascular stenosis function evaluation, and the accuracy is low is solved, if only one side of the vertebral artery on the two sides of a patient has lesion, the compensation function of the opposite side healthy vertebral artery is neglected in the prior art, the influence of lesion on vascular function can be overestimated, and the vascular stenosis function evaluation accuracy is improved. According to the method, the bilateral vertebral arteries are coupled through the pressure drop constraint condition, and the intracranial posterior circulation vascular stenosis functional evaluation is comprehensively performed in combination with the condition of the basilar artery, so that the method is more accurate, and the output evaluation dimension is wider.

The invention provides a vertebral artery stent, which relates to the technical field of medical instruments, and comprises a stent main body used for being placed in a vertebral artery; the stent flaring is arranged at one end of the stent main body and is suitable for being attached to a vertebral artery opening in a self-expanding manner; the self-expandable stent flaring is arranged, the stent flaring can be matched with the vertebral artery opening blood vessel shape and attached to the vertebral artery opening, a doctor does not need to excessively expand through a balloon and other structures, the stent service life is prolonged, the problems that the stent opening position is excessively extruded and plaques fall off are solved, and the operation efficiency is improved; meanwhile, the good wall attaching effect of the stent flaring and the vertebral artery opening is guaranteed.

The invention provides a vertebral artery stent. The vertebral artery stent is characterized by comprising a stent body, a blocking balloon assembly and a supporting balloon assembly; wherein the plugging balloon assembly comprises a plugging balloon and a plugging catheter which are connected with each other; a balloon body of the plugging balloon is arranged at the front end of the stent body, and the plugging catheter penetrates through the whole stent body and extends out of the rear end of the stent body; the supporting balloon assembly comprises a supporting balloon and a supporting catheter which are connected with each other; a balloon body of the supporting balloon is arranged in the stent body, and the supporting catheter extends out of the rear end of the stent body. The stent can effectively solve the problem of plaque flow guide in the stent implantation process.

Improved systems including rBGCs improved by means of stiffness; working zones and optimized transition zones can traverse the aortic arch into the common carotid and vertebral arteries from a radial approach including navigation of tortuous and individuated anatomical challenges. Mechanical Thrombectomy improved by balloon occlusion prevents thrombus showers and follows 10 years of interventional cardiology and diagnostic use of improved radial approach (TRA) with better systems, making trans-femoral (TFA)less safe and effective than this revised treatment paradigm, unexpectedly better than literature predicted in early parts of the decade. Likewise, carotid stenting may be performed during these intracranial arterial occlusion procedures without swapping out guide catheters as required by the prior art.

The invention provides a sectional type vertebral artery stent and a conveying system thereof, and belongs to the technical field of vascular intervention medical instruments. The sectional type vertebral artery stent comprises a stent body, and the stent body is provided with a supporting section and an anchoring section which are integrally connected; the supporting section is used for supporting a target position of a vertebral artery; the anchoring section is arranged at one end of the supporting section, the anchoring section is provided with a first branch and a second branch, the first branch and the second branch are arranged in the circumferential direction of the supporting section at intervals, a preset first included angle is formed between the first branch and the supporting section, and a preset second included angle is formed between the second branch and the supporting section; during working, after the stent body is released and expanded, the first branch and the supporting section form a preset first included angle, and the second branch and the supporting section form a preset second included angle which is used for being matched with an anatomical oblique angle of a target position. The technical problems that in the prior art, after being implanted, a single-section stent is prone to displacement, disturbs blood flow, is prone to forming thrombus and cannot be matched with the anatomical oblique angle at the bifurcation position are mainly solved.

The invention relates to the technical field of medical instruments, and particularly discloses a passage catheter special for releasing a vertebral artery stent through a radial artery admission passage, the passage catheter comprises a catheter, the catheter comprises an adjusting catheter and a body catheter, the adjusting catheter and the body catheter are coaxially connected, the body catheter comprises a near-end catheter and a far-end catheter, and the near-end catheter and the far-end catheter are coaxially connected. The near-end catheter comprises a first-stage coating, a first-stage outer tube, an annular cavity channel and a first-stage inner tube, a design scheme for adjusting the bending angle of the far-end catheter is adopted, the bending angle of the far-end catheter can be flexibly adjusted, the near-end catheter can adapt to complex blood vessels, the surgical operation difficulty is reduced, and the surgical efficiency is improved; the catheter comprises the soft head end, and when the head end makes contact with the inner wall of the blood vessel, damage to the blood vessel can be reduced; the catheter has two blood vessel entering modes, namely, the same-side blood vessel entering mode and the different-side blood vessel entering mode, the application mode of the catheter can be widened, and the instrument using cost of a patient is reduced.

The invention discloses a vertebral artery stent and a stent conveying system.The vertebral artery stent comprises a net-tube-shaped stent formed by weaving first weaving wires and second weaving wires according to the quantity ratio of 0.25-4: 1, and the degradation speed of the first weaving wires is larger than that of the second weaving wires; therefore, the mesh size of the mesh tubular stent can be increased along with the degradation of the first weaving wires. While the radial supporting force is ensured, the requirement that the stent is not broken during torsion is met, and meanwhile, the potential safety hazard of a patient caused by thrombus of a metal material can be effectively reduced.