CN218279740U

CN218279740U - Thrombus removing system

Info

Publication number: CN218279740U
Application number: CN202220929522.XU
Authority: CN
Inventors: 潘宁; 刘欢德; 肖运鹏; 陈关宝
Original assignee: Guichuang Tongqiao Medical Technology Co ltd
Current assignee: Guichuang Tongqiao Medical Technology Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2023-01-13
Anticipated expiration: 2032-04-21

Abstract

The utility model discloses a thrombus removal system, which comprises a first appliance, a second appliance and an extracorporeal fluid auxiliary mechanism, wherein the first appliance comprises a guide wire, a cutting basket, a cutting bolt pipe, a catheter mechanism and a handle, the second appliance comprises a catheter mechanism, and the catheter mechanism comprises a balloon, a double-layer catheter and a catheter head end; the first instrument and the second instrument are respectively positioned at two ends of the plug block, and the other ends of the first instrument and the second instrument are communicated with the extracorporeal fluid auxiliary mechanism; the cutting basket is welded or bonded on the cutting bolt tube, the cutting bolt tube is connected on the handle by a mechanical device, and the front end of the cutting bolt tube is used for acting on the bolt block after passing through the catheter mechanism; the sacculus bonds in the outer tube of double-deck pipe, and the near sacculus end port of double-deck pipe is sealed, and the outer tube of double-deck pipe and sacculus junction are seted up the gas pocket. The utility model discloses a thrombus clean-up system, the improvement of very big efficiency pumps efficiency, prevents the flat damage of vascular extrusion, and the accessible pumps the chamber continuous and take out the thrombus after the preliminary treatment external.

Description

Thrombus removing system

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a thrombus clearance system.

Background

Venous Embolism of the lower limb, i.e. Deep Venous Thrombosis of the lower limb (DVT), together with Pulmonary Thromboembolism (PE) is known as Venous Thromboembolism (VTE). With the aging population and the changing lifestyle of humans, VTEs have become a worldwide health crisis, and over 1000 million people are diagnosed each year. DVTs can be simply classified according to the location of the thrombus formation: inferior vena cava thrombosis, iliac femoral vein thrombosis and crus venous plexus thrombosis, because of obvious symptoms in the acute stage and the enhancement of health consciousness of people nowadays, many patients can be treated in an acute thrombosis state.

The existing treatment methods mainly comprise vascular incision and embolectomy, catheter contact thrombolysis, percutaneous puncture mechanical aspiration and the like. The main defects are as follows: the operation of the vascular incision and embolectomy has large wound, high risk, various complications and high operation difficulty.

The catheter contact thrombolysis and the percutaneous puncture mechanical thrombolysis belong to minimally invasive interventional operation methods, and the catheter contact thrombolysis has long duration and takes about 1 to 2 days. Meanwhile, the thrombus is incompletely dissolved, and other organs of the whole body bleed, so that the curative effect is uncertain. The mechanical embolectomy of subcutaneous puncture is better to the little thrombus effect, when getting longer great thrombus, probably blocks up the suction tube, and long-time negative pressure can lead to the blood loss volume too much simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thrombus clearance system to solve the problem that above-mentioned prior art exists, dissolve through two sacculus shutoff, medicine and tie, machinery cuts preliminary treatment such as tie, under the supplementary effect of external fluid, the improvement suction efficiency of very big efficiency prevents the flat damage of vascular extrusion futilely, and the accessible suction chamber is continuous takes out the thrombus after the preliminary treatment extracorporeally.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a thrombus removal system, which comprises a first appliance, a second appliance and an extracorporeal fluid auxiliary mechanism, wherein the first appliance comprises a guide wire, a cutting basket, a cutting bolt tube, a catheter mechanism and a handle, the second appliance comprises a catheter mechanism, and the catheter mechanism comprises a balloon, a double-layer catheter and a catheter head end; the first appliance and the second appliance are respectively positioned at two ends of the plug block, and the other ends of the first appliance and the second appliance are communicated with the extracorporeal fluid auxiliary mechanism;

the cutting basket is welded or bonded on a cutting bolt tube, the cutting bolt tube is connected to the handle through a mechanical device, and the front end of the cutting bolt tube is used for acting on a bolt block after penetrating through the catheter mechanism; the balloon is adhered to the outer tube of the double-layer catheter, the port of the double-layer catheter close to the balloon is closed, and an air hole is formed in the joint of the outer tube of the double-layer catheter and the balloon.

Preferably, the cutting mesh basket is formed by preforming nickel-titanium wires or formed by winding stainless steel wires into strands and then forming.

Preferably, a developing ring is pressed in a gap between the inner tube and the outer tube at the closed port of the balloon end near the double-layer catheter.

Preferably, a first cavity channel is arranged between the outer wall of the inner tube and the inner wall of the outer tube of the double-layer catheter, a second cavity channel is arranged in the inner tube of the double-layer catheter, a first luer connector, a second luer connector and a sealing head are arranged at the head end of the catheter, the first luer connector, the first cavity channel and the air hole form a first channel, the sealing head, the second luer connector and the second cavity channel form a second channel, and the bolt cutting tube is used for penetrating through the second channel and then acting on the bolt block.

Preferably, the extracorporeal fluid assisting mechanism comprises a conveying part and a negative pressure backflow part, the other end of the first instrument is communicated with the conveying part, and the other end of the second instrument is communicated with the negative pressure backflow part.

Preferably, the delivery section comprises a source of liquid, a delivery conduit and a low pressure delivery pump; one end of the conveying pipeline is connected with a liquid source through a low-pressure conveying pump, and the other end of the conveying pipeline is connected with a luer connector II of the instrument I through a female luer connector I.

Preferably, a pressure sensor is arranged on the conveying pipeline, the pressure sensor is used for monitoring the fluid pressure in the conveying pipeline and feeding back the fluid pressure to the control unit, and the control unit is used for controlling the rotating speed of the low-pressure conveying pump.

Preferably, the negative pressure return section comprises a waste collection container, a negative pressure suction pump and a negative pressure return conduit; one end of the negative pressure backflow pipeline is connected with the waste collection container through a negative pressure suction pump, and the other end of the negative pressure backflow pipeline is connected with a second luer connector of the second instrument through a second female luer connector.

The utility model discloses following beneficial technological effect has been gained for prior art:

1. the separable combined apparatus can be combined and used randomly according to clinical requirements, namely the apparatus I is matched with the apparatus II, the apparatus II is matched with the apparatus II, or the apparatus I and the apparatus II are used independently.

2. The advantages of all methods of the thrombus taking device on the market at present are integrated, thrombus is taken in multiple modes through comprehensive application, and a better solution is provided for thrombus with different shapes such as the length of thrombus, the old thrombus and the like.

3. The double-balloon protection structure forms a section of closed space, thereby not only improving the thrombolysis efficiency, but also fixing the thrombus and preventing the thrombus from escaping to the lung to cause pulmonary embolism in the thrombolysis or cutting process. Meanwhile, the bleeding amount can be greatly reduced, a large amount of thrombus can be extracted under a small negative pressure, and the thin-wall blood vessel is protected.

4. The extracorporeal liquid auxiliary system can effectively protect blood vessels during suction and realize suction with higher efficiency.

5. Function of extracorporeal liquid-assisted system: (1) diluting to make thrombus into suspension with certain concentration; (2) the filling function counteracts the influence of the negative pressure of the suction on the blood vessel.

6. The pressure sensor makes the control of the degree of filling and expanding of the blood vessel in the double-balloon closed section possible, so that the regulation and control of the clearance between the blood vessel wall and the cutting basket in the motion state are realized.

Drawings

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

FIG. 1 is a schematic view of a first embodiment of the apparatus;

FIG. 2 is a schematic structural view of a catheter mechanism;

FIG. 3 is a schematic diagram of an extracorporeal fluid assist mechanism;

FIG. 4 is a schematic view of a jugular access in accordance with one embodiment;

FIG. 5 is a schematic view of another lateral femoral vein access in accordance with one embodiment;

FIG. 6 illustrates a retrograde approach of the femoral vein with the apparatus according to the first embodiment;

FIG. 7 is a working diagram of the body inner section of the liquid assistant system in the first embodiment;

wherein, 1 is a guide wire; 2, cutting a net basket; 3 cutting the bolt tube; 4, a balloon; 5 a double-layer conduit; 51 a developing ring; 52 air holes; 53 inner tube; 54 an outer tube; 55, channel one; 56 channel two; 6 a catheter tip; 61 luer connector one; 62 luer connector II; 63 sealing the head; 7, a handle; 8 a liquid source; 9 a delivery conduit; 10 low pressure delivery pump; 11 a pressure sensor; 12 a female luer connector one; 13 a female luer connector II; 14 negative pressure return line; 15 negative pressure suction pump; 16 a waste collection container; 17, a first instrument; 18, a second instrument; 19 the jugular vein; 20 inferior vena cava; 21 the iliac vein; the 22 femoral vein.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model aims at providing a thrombus clean-up system to solve the problem that above-mentioned prior art exists, cut preliminary treatment such as bolt through two sacculus shutoff, medicine thrombolysis, machinery, under the supplementary effect of external fluid, the improvement suction efficiency of very big efficiency prevents the dry and flat damage of vascular extrusion, and the accessible suction chamber is continuous takes out the thrombus after the preliminary treatment extracorporeally.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.

Referring to fig. 1-3, the present invention provides a thrombus removal system, which mainly comprises two sets of apparatus and extracorporeal fluid auxiliary mechanism. The first instrument 17 is a mechanism comprising a second instrument 18 and a tape embolectomy system. The second apparatus is a suction catheter with a double-layer structure and a saccule 4. The extracorporeal fluid auxiliary mechanism mainly comprises a conveying system and a negative pressure backflow system.

Specifically, the first instrument 17 is shown in fig. 1, and specifically comprises a guide wire 1, a cutting basket 2, a cutting embolectomy tube 3, a balloon 4, a double-layer catheter 5, a catheter head end 6 and a handle 7. The second apparatus specifically comprises a balloon 4, a double-layer catheter 5 and a catheter head 6.

Wherein the cutting net basket 2 is formed by preforming nickel titanium wires or is formed by firstly winding stainless steel wires into strands and then processing and molding. The cutting basket 2 is welded or glued to the cutting bolt tube 3, and the cutting bolt tube 3 is connected to the handle 7 by mechanical means. The balloon 4 is bonded to the outer layer of the double-layered catheter 5, and its inflation or deflation is performed through the gaps between the double-layered catheter 5. The port of the double-layer catheter 5 near the balloon 4 is closed and can be realized by adopting bonding and other modes. The outer side of the double-layer catheter 5 at the joint with the balloon 4 is provided with a series of small holes to realize the filling of the balloon 4.

The specific structure of the balloon 4, the double-layer catheter 5 and the catheter tip 6 is shown in fig. 2. And 51 is a developing ring which is pressed on the outer tube 54 of the double-layer catheter 5. The outer tube 54 and the inner tube 53 form two channels. The air hole 52, the first cavity channel 55 and the first luer connector 61 with a closed switch form a complete cavity channel, and an external air or developing solution passage is mainly provided for the opening and the retraction of the balloon 4. And a second cavity channel is formed by the second luer connector 62 with a closed switch, the sealing head 63 and the second cavity channel 56. When the sealing head 63 is closed, thrombolytic drugs can be beaten to the other end of the catheter through the luer connector II 62 or thrombus blocks broken by the net basket can be sucked through the cavity. If the sealing head 63 is opened, the embolectomy tube 3 and the guide wire 1 can pass through the second lumen 56, so that the instrument is combined into a new suction system for removing thrombus.

The power device handle system comprises a motor, a speed reducing mechanism and the like, and belongs to the prior art, which is not detailed.

Fig. 3 shows a schematic diagram of an extracorporeal liquid assist mechanism. The low pressure delivery pump 10 draws saline from the source 8 through the delivery conduit 9 and connects to the first delivery tube head female luer 12 via the second luer 62 of the first device 17. The liquid source 8 may be a saline bag or other sealed containment vessel. The low pressure delivery pump 10 provides the motive force to deliver saline from a fluid source to a port at the distal end of the instrument 17 and eject it. The pressure sensor 11 measures the flow pressure of the physiological saline in the pipeline in real time, and transmits a feedback signal to the control unit to control the rotating speed of the low-pressure pump 10, so that the purpose of pressure feedback real-time control is achieved, and the blood vessel is prevented from being damaged by overlarge flow of the physiological saline.

The female luer connector II 12 is connected with the luer connector II 62 on the instrument II 18, the negative pressure suction pump 15 (or other negative pressure sources such as a syringe, a vacuum bottle and the like) sucks thrombus through the suction cavity of the instrument II 18, the female luer connector II 13 and the negative pressure backflow pipeline 14, and then the sucked thrombus blocks slide down into the waste collection container 16 through the bottom channel. Establish the internal external return circuit of liquid way of normal saline from this to guarantee at the in-process of suction thrombus, prevent on the one hand the blood vessel because the shrivelled damage that the negative pressure suction caused, on the other hand mixes into turbid liquid with normal saline and thrombus, make the thrombus can be taken out and can not block up the suction chamber continually. Another obvious benefit is that the extracorporeal circulation system allows a substantial reduction in the amount of aspirated bleeding.

Example one

As shown in fig. 4-7, the overall combined thrombectomy system works as follows:

the specific use process of the instrument is explained by taking the example of clearing iliac vein thrombosis.

1. From the jugular vein puncture, device one 17 enters the iliac vein 21 via the inferior vena cava 20. The specific process is that the guide wire searches for a correct path, then the embolectomy tube 3 is placed in the double-layer tube, the guide wire is guided to a proper position (close to one end of the thrombus segment), and then the proximal end saccule 4 is driven up, as shown in fig. 4. Preferably, the first device 17 is inserted through the opposite femoral vein 20 and then through the iliac vein 21 to the opposite thrombotic end and the proximal balloon 4 is started, as shown in figure 5.

2. Puncture is made from the femoral vein 22 and the second device 18 is punctured through the femoral vein 22 retrograde to near the distal end of the thrombus and fill the distal balloon 4 as shown in fig. 6.

3. On the premise that the two balloons are full, thrombolytic drugs are injected into the related passages of the second lower end device 18. Because the plugging effect of saccules at two ends, the thrombolytic drug cannot slip away along with the blood flow, and the thrombus at two ends can be dissolved and plugged fully, so that a better effect can be achieved by using a smaller dose of thrombolytic drug.

4. In the process of the thrombolytic drug action, the cutting basket 2 of the upper end instrument I17 extends out and moves back and forth along the second cavity channel 56 of the double-layer catheter 5 to act together with the thrombolytic drug to break and cut the thrombus, so that the thrombus becomes turbid liquid fully mixed with blood.

5. And (3) decompressing the balloon 4 of the second distal end instrument 18, starting the extracorporeal liquid auxiliary system, injecting physiological saline into the blood vessel by the first instrument 17, and sucking the physiological saline and the second instrument 18 to form a backflow passage, as shown in fig. 7. The extracorporeal liquid auxiliary system can effectively prevent the damage caused by local blood vessel deflation caused by negative pressure in the suction process. Meanwhile, the formed liquid loop can greatly improve the pumping efficiency.

6. While performing aspiration, the double-layer catheter 5 of the second device 18 is moved to draw out the thrombus through the second lumen 56. Preferably, the first tool 17 can move continuously during the suction process to stir the cut, so that the suction is easier.

Alternatively, the positions of the first instrument 17 and the second instrument 18 can be interchanged. The first device 17 and the second device 18 can be used independently for removing small thrombi, such as cutting, thrombolysis, suction or any combination thereof.

The suction and thrombolysis medicines of the second instrument 18 are the same cavity, 1 luer connector is commonly used, and 2 luer connectors can be designed, so that when thrombus possibly blocks the suction cavity during suction, thrombolysis medicines can be injected into the other luer connector to be dissolved and sprayed out, and equipment does not need to be repeatedly replaced. The bolt cutting tube 3 and the transmission shaft at the handle 7 can be fixedly connected by bonding, welding, interference fit and the like.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A thrombus removal system, comprising: the device comprises a first device, a second device and an extracorporeal fluid auxiliary mechanism, wherein the first device comprises a guide wire, a cutting basket, a cutting embolus tube, a catheter mechanism and a handle, the second device comprises a catheter mechanism, and the catheter mechanism comprises a balloon, a double-layer catheter and a catheter head end; the first appliance and the second appliance are respectively positioned at two ends of the bolt block, and the other ends of the first appliance and the second appliance are communicated with the extracorporeal fluid auxiliary mechanism;

the cutting basket is welded or bonded on a cutting bolt tube, the cutting bolt tube is connected on a handle by a mechanical device, and the front end of the cutting bolt tube is used for acting on a bolt block after passing through the catheter mechanism; the balloon is adhered to the outer tube of the double-layer catheter, the port of the double-layer catheter close to the balloon is closed, and an air hole is formed in the joint of the outer tube of the double-layer catheter and the balloon.

2. The thrombus removal system of claim 1, wherein: the cutting basket is formed by preforming nickel-titanium wires or by winding stainless steel wires into strands and then forming.

3. The thrombus removal system of claim 1, wherein: and a developing ring is pressed in a gap between the inner tube and the outer tube at the closed port of the balloon end of the double-layer catheter.

4. The thrombus removal system of claim 1, wherein: the double-layer catheter comprises a double-layer catheter and is characterized in that a first cavity channel is arranged between the outer wall of an inner tube and the inner wall of an outer tube of the double-layer catheter, a second cavity channel is arranged in the inner tube of the double-layer catheter, a first luer connector, a second luer connector and a sealing head are arranged at the head end of the double-layer catheter, the first luer connector, the first cavity channel and a gas hole form a first channel, the sealing head, the second luer connector and the second cavity channel form a second channel, and the bolt cutting tube is used for acting on a bolt after penetrating through the second channel.

5. The thrombus removal system of claim 4, wherein: the extracorporeal fluid assisting mechanism comprises a conveying part and a negative pressure backflow part, the other end of the first appliance is communicated with the conveying part, and the other end of the second appliance is communicated with the negative pressure backflow part.

6. The thrombus removal system of claim 5, wherein: the conveying part comprises a liquid source, a conveying pipeline and a low-pressure conveying pump; one end of the conveying pipeline is connected with a liquid source through a low-pressure conveying pump, and the other end of the conveying pipeline is connected with a luer connector II of the first device through a female luer connector I.

7. The thrombus removal system of claim 6, wherein: the pressure sensor is arranged on the conveying pipeline and used for monitoring the fluid pressure in the conveying pipeline and feeding the fluid pressure back to the control unit, and the control unit is used for controlling the rotating speed of the low-pressure conveying pump.

8. The thrombus removal system of claim 5, wherein: the negative pressure backflow part comprises a waste collection container, a negative pressure suction pump and a negative pressure backflow pipeline; one end of the negative pressure backflow pipeline is connected with the waste collection container through a negative pressure suction pump, and the other end of the negative pressure backflow pipeline is connected with a second luer connector of the second instrument through a second female luer connector.