Medical inner support hollow tubular sac catheter

Abstract

The invention relates to a medical inner support hollow tubular sac catheter which comprises a catheter body, a tubular sac and a filling tube connected with the tubular sac, wherein the catheter body is sheathed with a sleeve; the medical inner support hollow tubular sac catheter is characterized in that the front end of the sleeve is provided with more than two sliding sections, wherein the circumference of the front end of the first sliding section is evenly articulated with N support rods; the sides of M support pieces are articulated with each other so as to form an inner wall which is in a circular ring shape after being stretched; and the sliding sections and the support rods form umbrella-shaped support for the circular-ring-shaped inner wall. The medical inner support hollow tubular sac catheter leads blood flow with the quantity being more than 50% of original blood flow filling capacity to pass through a support cavity, and ensures the blood flow at far and near ends of treatment parts not to be blocked in the treatment process, thus reducing the probability of vascular accident in the period of treatment and surrounding treatment, improving the safety of operation, andsolving the problem of blocking branch artery blood supply when in treatment in a branch blood vessel cavity.

Description

technical field [0001] The invention belongs to medical equipment, in particular to a catheter used for intravascular expansion treatment and (or) components of a vascular stent release system. Background technique [0002] So far, the ideal dilation balloon for the treatment of vascular diseases, the Inoue balloon, has been recognized as superior to any polyethylene balloon used for the same purpose. However, the cross-section of Inoue’s balloon is a solid circle, and the blood flow at the distal and proximal ends of the treatment site must be completely blocked during the treatment process. After the blood flow is blocked: a. It will cause near or complete ischemia of the distal organs, and secondary ischemia Reperfusion injury, even organ necrosis. b. Due to the pressure of the heart ejecting blood, if the ascending aorta or aortic arch close to the heart is blocked, it will cause cardiac counterpulsation (AIBP), which will undoubtedly induce serious cardiovascular event...

AI Technical Summary

Problems solved by technology

However, the cross-section of Inoue’s balloon is a solid circle, and the blood flow at the distal and proximal ends of the treatment site must be completely blocked during the treatment process. After the blood flow is blocked: a. It will cause near or complete ischemia of the distal organs, and secondary ischemia Reperfusion injury, even organ necrosis

b. Due to the pressure of the heart ejecting blood, if the ascending aorta or aortic arch close to the heart is blocked, it will cause cardiac counterpulsation (AIBP), which will undoubtedly induce serious cardiovascular events and increase perioperative accidents chance of an event

c. The balloon itself has the tendency and force to move far away under the impact of the heart’s ejection pressure, and this force depends entirely on the friction force between the balloon and the blood vessel wall that is greater than it to keep the balloon in place. Very likely to cause damage to the vessel wall, and may have serious consequences such as thrombosis or dissection

Clinically, in order to avoid appealing defects, the solution is to change one treatment to multiple treatments, for example: during PTA treatment, the original balloon expansion time is changed from 3 minutes to 1 minute, and 1 expansion treatment is changed to 2 or Repeated balloon expansion is expected to avoid some accidents, but it will undoubtedly aggravate the damage of the vascular intima. Practice has proved that the results of this method are not satisfactory

In addition, the stent system currently used for endovascular treatment of aortic branch vessels will also block blood flow for a long or short time during the process of releasing the stent, which may lead to spinal cord ischemia and paraplegia

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