CN105214199A - Partial sealing reverse-flow type thrombosis suckion remover - Google Patents

Abstract

A partial occlusion backflow thrombus suction device, including a balloon, a balloon catheter, a thrombus removal drill, a fluid infusion tube and a collection tube, wherein the thrombus removal drill is hollow and communicated with the fluid infusion tube; the collection tube is set on the thrombus The lumen of the collection tube is formed outside the drill bit and the fluid infusion tube and between the thrombus removal drill bit and the fluid infusion tube, and the lumen is communicated with the thrombus suction outlet. The invention can suck the thrombus fragments out of the body through the collection tube after pulverizing the thrombus, and at the same time replenish the lost blood through the fluid infusion tube, maintain the pressure in the blood vessel, and inject thrombolytic drugs at the same time, with simple structure and convenient operation.

Description

Partial occlusion backflow thrombus aspirator

technical field

The invention relates to a medical device, in particular to a partially blocked backflow thrombus suction device.

Background technique

In the cardiovascular system of a living body, the process of coagulation of blood or the formation and coagulation of certain substances in the blood to form solid masses is called thrombus formation. Different from blood clots, thrombus is a small piece of blood formed on the surface of the peeled or repaired part of the inner surface of the cardiovascular system under the state of blood flow. The thrombus may dislodge and enter the pulmonary artery along the direction of blood flow, causing fatal pulmonary embolism with a high fatality rate.

Considering the severity and prevalence of diseases related to thromboembolism (such as cardiac embolism, cerebral embolism, organ embolism, peripheral thrombosis, etc.), various techniques for dissolving or removing thrombus have been developed, and the commonly used treatment methods are: 1 , drug treatment, mainly anticoagulant, thrombolytic and other drug treatment. Drug therapy cannot be fully opened, and symptoms such as bleeding or hemorrhage occasionally occur; in addition, for some urgent cases, the speed of drug therapy is too slow. 2. Surgical treatment, an incision is made in the blood vessel where the thrombus is deposited, and the thrombus is taken out through the incision. Surgical treatment is traumatic, and the damage to the vein wall and venous valves is easy to recur. Moreover, the thrombus removal process itself may cause residual thrombus to enter the lung, causing fatal pulmonary embolism. 3. Interventional treatment, using percutaneous puncture, introduces special minimally invasive interventional surgical instruments into the vein through a tiny incision on the patient's body surface, and directly performs thrombolysis and thrombus removal under X-ray fluoroscopy. Compared with conventional surgical treatment, interventional thrombectomy has the advantages of minimal invasiveness, short operation time, fast curative effect, less consumption of thrombolytic agents, and no potential for thrombolytic bleeding. It has gradually become the preferred treatment method.

The document retrieval of prior art finds, and patent No. is ZL200320121061.0 Chinese invention patent " venous thrombus retrieval tube " (authorized announcement number is CN2659350Y) discloses a kind of vein thrombus retrieval tube, and this patent is made up of liner wire, thrombus retrieval tube. Composed of three parts, the tube and the balloon, the deep vein thrombosis of the extremities can be removed without damaging the venous valve. For some old thrombus, it may be difficult to achieve one-time scraping, and it is easy to cause some small thrombus to remain in the blood vessel and cannot be completely removed.

The Chinese invention patent "Sliding Combined Catheter for Treating Thrombosis" with patent number ZL200820098250.3 (authorized announcement number is CN201192520Y) discloses a sliding combined catheter for treating thrombus. The patent uses two balloons respectively Realize the functions of temporary blockage of blood vessels and thrombus scraping, thereby reducing the chance of residual broken small thrombus.

Application No. is 92106702.X's Chinese invention patent "catheter for removing internal organ vascular embolus" (publication number is CN1072867A) discloses a kind of catheter for obtaining internal organ vascular embolus. This patent consists of an inner catheter with a balloon and an overtube with a bell mouth and a side hole. However, the bell mouth of this patent is a rigid structure with a fixed size, which cannot adapt to blood vessels of different thicknesses. In addition, this rigid structure is not conducive to the sealing of the contact part between the head end of the overtube and the human blood vessel, and there is also an opening near the bell mouth. There are some side holes, these reasons will cause some broken small thrombus clots to remain in the blood vessel and cannot be completely removed.

In the above four patents, the components that directly perform the thrombus scraping function are all balloons. The balloon itself is an elastic element with a smooth surface, and the human blood vessel wall has a certain degree of elasticity, which makes both the blood vessel and the balloon "give back" to a certain extent during the thrombus scraping. Some thrombi, especially old ones, cannot be completely scraped off.

Patent No. ZL200620164685.4 Chinese invention patent "thrombosis remover" (authorized announcement number is CN201042451Y) discloses a kind of thrombus retriever. This patent adopts the umbrella-shaped structure that is made of memory alloy metal wire to scrape thrombus, and adopts cannula to excrete thrombus after scraping. However, the wire also has the potential to scratch the lining of the blood vessel.

The Chinese invention patent "A New Type of Thrombus Cleaner" (publication number CN101450001A) with the application number 200710144721.X uses shape memory alloy material to perform complex and precise thrombus removal operations in narrow blood vessel lumens. When working, the memory alloy returns to the helical shape to grasp the thrombus, and finally the thrombus deformation remover takes the thrombus out of the blood vessel. However, there will be small blood clots generated during the grasping process, which remain in the blood vessel and cannot be taken out.

The above-mentioned prior art still has the following deficiencies: the intima of the blood vessel is damaged during the thrombus scraping process, and secondary thrombus is easily formed; the broken small thrombus pieces produced during the scraping and thrombus part remain in the blood and enter the bypass arteries and organs, which may cause Embolism or functional failure of related organs.

Contents of the invention

The object of the present invention is to provide a novel partial blockage reflux thrombus suction device in order to solve the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions: a partial blockage backflow thrombus suction device, including a balloon, a balloon catheter, a thrombus removal drill, a fluid replacement tube and a collection tube, and the thrombus removal drill is hollow structure and connected with the fluid infusion tube; the collection tube is set outside the thrombus removal drill and the fluid infusion tube to form a lumen of the collection tube between the thrombus removal drill and the fluid infusion tube, and the lumen communicates with the thrombus suction outlet.

The invention can suck the thrombus fragments out of the body through the collection tube after pulverizing the thrombus, and at the same time replenish the lost blood through the fluid infusion tube, maintain the pressure in the blood vessel, and inject thrombolytic drugs at the same time, with simple structure and convenient operation.

Description of drawings

Fig. 1 is a schematic diagram of the basic structure of the present invention.

Fig. 2 is a partial cross-sectional structural schematic diagram of the present invention.

detailed description

Referring to FIG. 1 and FIG. 2 , the partial occlusion return thrombus suction device of the present invention includes a balloon 1 , a balloon catheter 2 , a thrombus removal drill 3 , a fluid replacement tube 5 and a collection tube 4 . The thrombus removal drill 3 has a hollow structure and is connected to the fluid replacement tube 5. The collection tube 4 is set outside the thrombus removal drill and the fluid replacement tube and forms a collection tube lumen 41 between the thrombus removal drill and the fluid replacement tube. The lumen 41 It communicates with the thrombus suction port 6. The lower end of the replenishment pipe 5 is provided with a replenishment inlet 7 . The balloon catheter lumen 21 communicates with the balloon 1 , and the thrombus removal drill lumen 31 communicates with the fluid replacement injection port 7 .

Claims (1)

1. A local blockage backflow thrombus suction device, comprising a balloon, a balloon catheter, a thrombus removal drill, a liquid infusion tube and a collection tube, characterized in that: the thrombus removal drill is a hollow structure and communicated with the fluid infusion tube The collection tube is set outside the thrombus removal drill and the fluid infusion tube and forms a lumen of the collection tube between the thrombus removal drill and the fluid infusion tube, and the lumen communicates with the thrombus suction outlet.