CN212521907U

CN212521907U - Cerebral embolism extraction device

Info

Publication number: CN212521907U
Application number: CN202020488634.7U
Authority: CN
Inventors: 苑杨; 哈那提·努尔兰别克; 阿不都拉·艾莎; 吴勤奋
Original assignee: SECOND AFFILIATED HOSPITAL OF XINJIANG MEDICAL UNIVERSITY
Current assignee: SECOND AFFILIATED HOSPITAL OF XINJIANG MEDICAL UNIVERSITY
Priority date: 2020-04-06
Filing date: 2020-04-06
Publication date: 2021-02-12
Anticipated expiration: 2030-04-06

Abstract

A cerebral embolism taking device comprises a sheath tube, an inner tube and an inner core, wherein the inner tube is inserted from one end of the sheath tube and penetrates out from the other end of the sheath tube, the inner core is inserted from one end of the inner tube and can slide along the tube wall of the inner tube, a blocking cuff is fixed at the front end of the inner tube, a section of negative pressure suction section is arranged on the inner tube behind the blocking cuff, and micropores are uniformly distributed on the tube wall of the inner tube of the negative pressure suction section; the rear ends of the sheath tube and the inner tube are respectively provided with a first negative pressure interface and a second negative pressure interface which are communicated with each other, the tail ends of the sheath tube and the inner tube are respectively covered with a sealing plug, the distal end of the inner core is fixed with a plugging device, the outer diameter of the plugging device is equal to the inner diameter of the inner tube, and the inner core can form a plug for the negative pressure suction section when sliding towards the proximal end of the inner tube. The device can plug the far end of the blood vessel, and small thrombus is placed in the blood vessel in the process of traction to the sheath tube; meanwhile, the device can perform negative pressure suction on the thrombus center to form a hoop effect, so that the thrombus is prevented from being taken out difficultly.

Description

Cerebral embolism extraction device

Technical Field

The utility model relates to the field of medical equipment, concretely relates to cerebral embolism remove device.

Background

With the improvement of living standard, the incidence of cardiovascular and cerebrovascular diseases is increased year by year, becoming one of three causes of death for human beings. The morbidity, the mortality, the disability rate and the recurrence rate of the cerebrovascular disease are high. It is a major subject facing the medical field, and is extremely harmful to human health. In general, the main cause of late adult onset is atherosclerotic thrombotic occlusive disease. Present thrombus remove device is mostly basket form filter, and this filter is very easily taken place the problem that the thrombus was revealed at the in-process that takes out, and only is applicable to the softer clot of thrombus hardness, can't cut the great clot of hardness and take out, and present cerebrovascular thrombus remove device can't cut the thrombus into less clot so that conveniently take out its negative pressure suction cerebrovascular blood vessel simultaneously, and the thrombus of partial leakage out very easily takes place the problem of the new thrombus of condensation formation once more at other positions of cerebrovascular blood vessel.

In order to solve the problems, the utility model with the application number of 201821446313.X discloses a vena cava thrombus taking-out device, which comprises an injector, a tube sheath, a positioning tube and a traction steel wire, wherein the rear end of the tube sheath is a handheld part, both sides above the handheld part are provided with a negative pressure suction interface and an inflation and deflation interface, the front end of the tube sheath is sleeved with an air bag, the inflation and deflation interface is connected with the air bag through an inflation tube, the positioning tube is inserted into the opening of the handheld part and extends out of the front end of the tube sheath, the traction steel wire is inserted into the positioning tube, the rear end of the traction steel wire is fixed with a pull ring, the front end of the traction steel wire is a spiral contraction section, the spiral contraction section is accommodated in a tube cavity of the positioning tube, the front end of the tube sheath is fixed with a thrombus cutting net sheet which is in a round table shape and gradually contracts towards the inside of the tube sheath, the positioning tube is inserted into the, a sealing plug is fixed at the opening of the hand-held part.

The above device has the following problems: 1. the spiral contraction section at the front end of the traction steel wire is of a hollow structure, and the traction steel wire is extremely fine, so that a cutting effect is formed on part of thrombus in the process of pushing the thrombus to the near end (the sheath direction) after the traction steel wire penetrates through the thrombus, part of the thrombus is left at the far end of the blood vessel, and the thrombus cannot be thoroughly removed; 2. because the thrombus has certain length, the spiral contraction section or the net-shaped filter can gradually expand in the middle of the thrombus to cause the thrombus to be blocked in the blood vessel and be difficult to move due to the lack of radial constraint action in the process of covering the thrombus and pulling the thrombus to the near end, and the thrombus can be broken to be aggravated and the thrombus can be left in the blood vessel due to the overlarge force when the pulling steel wire is pulled.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model designs a cerebral embolism extraction device which can form a blockage on the far end of a blood vessel and place small thrombus to be left in the blood vessel in the process of traction to a sheath tube; meanwhile, the device can perform negative pressure suction on the thrombus center to form a hoop effect, so that the problem that thrombus is difficult to take out due to the fact that the thrombus blocks a blood vessel because the middle part of the thrombus is expanded when the thrombus is pushed to the near end is solved.

In order to achieve the technical effects, the utility model discloses a following technical scheme realizes:

the utility model provides a cerebral embolism remove device, includes sheath pipe, inner tube and inner core, and the inner tube inserts and wears out from the other end of sheath pipe from the one end of sheath pipe, and the inner core inserts and can slide along the inner tube pipe wall from the one end of inner tube, the front end of inner tube is fixed with the shutoff cuff, and the rear end of inner tube is fixed with fills the gassing interface, fills the gassing interface through burying breather pipe and shutoff cuff through-going connection in the inner tube pipe wall underground, is equipped with one section negative pressure on the rear inner tube of shutoff cuff and attracts the section, and the equipartition has the micropore on the inner tube pipe wall of negative pressure. The front end of the inner tube is oval, so that the inner tube can conveniently penetrate through thrombus. The rear ends of the sheath tube and the inner tube are respectively provided with a first negative pressure interface and a second negative pressure interface which are communicated with each other. The tail ends of the sheath tube and the inner tube are respectively covered with a sealing plug, and the inner tube and the inner core respectively penetrate through the sealing plugs on the sheath tube and the inner tube to reach the front end of the sheath tube. In order to guarantee the vacuum aspiration effect of the thrombus of vacuum aspiration section to different length, prevent the condition that leaks gas, the utility model discloses a distal end of inner core is fixed with the plugging device, and the external diameter of plugging device equals with the internal diameter of inner tube, and the inner core can form the shutoff to the vacuum aspiration section when sliding to the inner tube near-end to adjust the vacuum aspiration length of vacuum aspiration section, the length of plugging device is not less than the interval length of vacuum aspiration section. When the negative pressure suction section is completely positioned in the thrombus, the inner tube is connected with a negative pressure source and can carry out negative pressure suction on the thrombus to form a hoop effect, so that the thrombus is prevented from being accumulated in the process of pushing the thrombus to the sheath tube direction to cause the blockage of the blood vessel.

In order to facilitate the thrombus to be taken out, a plurality of cutting blades can be arranged at a certain distance from the opening of the sheath tube, and the cutting blades can be spirally arranged on the inner wall of the sheath tube. In the process of pushing the inner tube backwards in a spiral manner, thrombus entering the cutting blade can be cut into thrombus particles, so that the thrombus is conveniently sucked out of the blood tube by negative pressure from the lumen of the sheath tube.

The utility model has the advantages that: the device can form blockage on the far end of a blood vessel, and small thrombus is placed in the blood vessel in the process of traction to the sheath tube; meanwhile, the device can perform negative pressure suction on the thrombus center to form a hoop effect, so that the problem that thrombus is difficult to take out due to the fact that the thrombus blocks a blood vessel because the middle part of the thrombus is expanded when the thrombus is pushed to the near end is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an assembled structure of a cerebral embolic obstruction retrieval device;

fig. 2 is a schematic sectional view of a cerebral embolism retrieval device.

In the drawings, the components represented by the respective reference numerals are listed below:

1-sheath tube, 2-first negative pressure interface, 3-sealing plug, 4-inner tube, 5-sealing cuff, 6-negative pressure suction tube section, 7-second negative pressure interface, 8-inflation and deflation interface, 9-inner core, 10-pull ring, 11-stopper and 12-cutting blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, a device for removing a cerebral embolism comprises a sheath tube 1, an inner tube 4 and an inner core 9, wherein the inner tube 4 is inserted from one end of the sheath tube 1 and penetrates out from the other end of the sheath tube 1, the inner core 9 is inserted from one end of the inner tube 4 and can slide along the tube wall of the inner tube 4, a plugging cuff 5 is fixed at the front end of the inner tube 4, a section of negative pressure suction section 6 is arranged on the inner tube behind the plugging cuff 5, and micropores are uniformly distributed on the tube wall of the inner tube of the negative pressure suction section 6. The front end of the inner tube 4 is oval, so that the inner tube can conveniently penetrate through thrombus. The rear ends of the sheath tube 1 and the inner tube 4 are respectively provided with a first negative pressure interface 2 and a second negative pressure interface 7 which are communicated with each other. The tail ends of the sheath tube 1 and the inner tube 4 are respectively covered with a sealing plug 3, and the inner tube 4 and the inner core 9 respectively penetrate through the sealing plugs 3 on the sheath tube 1 and the inner tube 4 to reach the front end of the sheath tube. In order to guarantee the vacuum aspiration effect of the thrombus of vacuum aspiration section to different length, prevent the condition of gas leakage, the utility model discloses a distal end of inner core 9 is fixed with plugging device 11, and the external diameter of plugging device 11 equals with the internal diameter of inner tube 4, and inner core 9 can form the shutoff to vacuum aspiration section 6 when sliding to the inner tube near-end to adjust the vacuum aspiration length of vacuum aspiration section, the length of plugging device 11 is not less than the interval length of vacuum aspiration section 6. When the negative pressure suction section 6 is positioned in the thrombus, the inner tube 4 can perform negative pressure suction on the thrombus to form a hoop effect when being connected with a negative pressure source, so that the thrombus is prevented from being accumulated in the process of pushing the thrombus to the sheath tube 1 to cause the blockage of the blood vessel.

In order to facilitate the removal of the thrombus, a plurality of cutting blades 12 may be further provided at a distance from the opening of the sheath 1, and the cutting blades 12 may be spirally arranged on the inner wall of the sheath 1. In the process of spirally pushing back the inner tube 4, thrombus entering the cutting blade can be cut into thrombus particles, so that the thrombus is conveniently sucked out of the blood tube by negative pressure from the lumen of the sheath tube 1.

The sheath tube 1 and the inner tube 4 are inserted along the blood vessel wall under the guidance of X-ray and sent to the vicinity of the thrombus, and then the inner tube 4 is inserted continuously until the occlusion cuff 5 crosses the thrombus, which is facilitated by the elliptical shape of the front end of the inner tube 4. Before inserting the inner tube 4, the surface of the blocking cuff 5 may be coated with a suitable amount of sterile lubricant, and when inserting the inner tube 4, the inflation/deflation interface 8 is connected to a syringe and the blocking cuff 5 is slightly sucked to be closely attached to the outer wall of the inner tube 4. After the front end of the inner tube 4 penetrates through the thrombus, the inner tube 4 is continuously inserted so that the thrombus is completely positioned in the interval of the negative pressure suction section 6, meanwhile, one end, close to the sheath, of the thrombus is aligned with one end, close to the sheath 1, of the negative pressure suction section 6, and in order to prevent air leakage of the redundant part, far away from the sheath 1, of the negative pressure suction section 6, the plugging device 11 can be pulled by the inner core 9 to plug the excessive negative pressure suction section 6. The injector is connected to the air charging and discharging interface 8 to charge the plugging cuff 5, the plugging cuff 5 forms a sealed plugging to the far end of the thrombus after being charged, tiny thrombus particles are prevented from being missed, then the injector is connected to the second negative pressure interface 7 to be pumped, at the moment, the inner tube 4 is in a negative pressure state, and the thrombus is sucked on the negative pressure suction section 6 by the negative pressure and is tightly attached to the inner tube 4. When the thrombus is pushed towards the sheath tube 1, the inner tube 4 can be properly rotated and pulled backwards; the inner tube 1 gradually gets into in the sheath pipe 1, when the thrombus got into cutting blade 12 department, the thrombus was cut into littleer thrombus grain by cutting blade under the rotation of inner tube, and the thrombus grain is collected in 1 lumen of sheath pipe, when shutoff cuff 5 shutoff in the front end of sheath pipe 1, sheath pipe 1 was encapsulated situation, was connected into negative pressure source with first negative pressure interface 2 this moment, if the syringe etc. carry out the negative pressure and attract, then can follow sheath pipe 1 with the thrombus suction, accomplished and get the bolt operation.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cerebral embolism taking device comprises a sheath tube and an inner tube, and is characterized by also comprising an inner core, wherein the inner tube is inserted into the sheath tube and extends out of the front end of the sheath tube, the inner tube is a hollow tube with a closed front end, the inner core is inserted into the inner tube and can slide along the inner tube, the front end of the inner core is fixedly provided with a plugging device, one end of the plugging device is abutted against the inner wall of the front end of the inner tube, the other end of the plugging device is fixedly connected with the inner core, the front end of the inner tube is fixedly provided with a plugging cuff, the rear end of the inner tube is provided with an air charging and discharging interface communicated with the plugging cuff, a negative pressure suction section is arranged behind the plugging cuff, micropores are uniformly distributed on the tube wall of the inner tube in a negative pressure suction section, the length of the plugging device is not less than the section length; the rear ends of the sheath tube and the inner tube are respectively provided with a first negative pressure interface and a second negative pressure interface which are communicated with each other, the tail ends of the sheath tube and the inner tube are respectively covered with a sealing plug, and the inner tube and the inner core respectively penetrate through the sealing plugs on the sheath tube and the inner tube to reach the front end of the sheath tube.

2. The device of claim 1, wherein the inner wall of the sheath distal to the sheath opening is provided with a helical cutting blade.