Device for removing and collecting pulmonary artery branch blood vessel thrombus

Abstract

The utility model discloses a device for removing and collecting pulmonary artery branch blood vessel thrombus, which relates to the technical field of pulmonary thrombus treatment instruments and comprises a supporting tube and a conveying tube penetrating through the supporting tube. The elastic film-covered umbrella-shaped support is used for scraping blood vessel wall-attached thrombus, and the elastic clamping piece is used for positioning the position of the supporting tube relative to the conveying tube. The supporting tube drives the elastic covered umbrella-shaped support to move along the blood vessel, thrombus attached to the wall of the blood vessel can be scraped conveniently, and when the supporting tube drives the elastic covered umbrella-shaped support to be squeezed and collected into the conveying tube, the covered bodies distributed on the side, away from the conveying tube, of the elastic covered umbrella-shaped support collect the scraped thrombus. Therefore, the thrombus which is scraped and broken is prevented from flowing into the secondary blood vessel to cause the embolism risk.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pulmonary thrombus treatment instrument technical field, concretely relates to a device for removing and collecting pulmonary artery branch vessel thrombus. BACKGROUND

[0002] Pulmonary embolism refers to the pathological and clinical state caused by the embedding material into the pulmonary artery and its branch, blocking the tissue blood supply, and the current pulmonary artery thrombus treatment method mainly has two kinds: drug thrombolysis and mechanical thrombectomy. Drug thrombolysis is generally longer in periodicity, compared with drug thrombolysis, the blood flow dynamics is immediately improved after mechanical thrombectomy, and the blood flow dynamics parameters such as pulmonary artery pressure and cardiac index are obviously improved.

[0003] The existing mechanical thrombectomy is mainly through a negative pressure suction auxiliary device to take out the thrombus, the catheter of the negative pressure suction end of the negative pressure suction auxiliary device is punctured to the corresponding position of the blood vessel, then the nozzle is aligned with the thrombus, and the negative pressure in the tube is generated through the equipment to suck the thrombus into the catheter, so that the thrombus is taken out.

[0004] The existing mechanical thrombus removal device has the following deficiencies: although the existing negative pressure suction auxiliary device can reduce the risk of thrombus falling during the thrombus removal process through negative pressure suction, the thrombus is easy to break during the thrombus suction process, once broken, the thrombus is easy to escape into the secondary branch blood vessel, causing the risk of secondary branch blood vessel embolism. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a device for removing and collecting pulmonary artery branch vessel thrombus to solve the technical problem that the existing mechanical thrombus removal device is easy to cause thrombus breakage and escape, causing the risk of secondary branch blood vessel embolism.

[0006] The technical problem solved by the utility model can be realized by the following technical scheme:

[0007] A device for removing and collecting pulmonary artery branch vessel thrombus, comprising a support pipe and a conveying pipe, the conveying pipe penetrates the support pipe, and further comprising:

[0008] An elastic membrane umbrella-shaped support for scraping off the blood vessel wall thrombus, which is fixedly connected to one end of the support pipe, and an elastic membrane umbrella-shaped support is arranged on the side away from the support pipe, and the elastic membrane umbrella-shaped support is arranged on the side away from the support pipe.

[0009] An elastic clamping piece for positioning the position of the support pipe relative to the conveying pipe, which is elastically connected to the support pipe, and a plurality of positioning holes matched with the elastic clamping piece are horizontally arranged on the conveying pipe.

[0010] As a further solution of the present invention: the elastic membrane-covered umbrella-shaped bracket includes two groups of mutually connected conical elastic metal grids, and the two groups of the conical elastic metal grids are symmetrically distributed.

[0011] As a further solution of the present invention: the conical elastic metal grid is a nickel-titanium alloy structure.

[0012] As a further solution of the present invention: the outer edges of the positions where the two groups of conical elastic metal grids are connected to each other are surrounded by a silicone ring.

[0013] As a further solution of the present invention: the elastic clamp includes an elastic clamping column, a mounting groove and a spring, the mounting groove is opened on the outer wall of the support tube, one end of the elastic clamping column slides and is inserted into the mounting groove, and the elastic clamping column is connected to the mounting groove through the spring, and the other end of the elastic clamping column is a conical end, and the conical end cooperates with the positioning hole.

[0014] As a further solution of the present invention: a fixed valve component for locking the relative positions of the support tube and the delivery tube is connected between the end of the delivery tube away from the elastic membrane umbrella-shaped bracket and the support tube.

[0015] As a further solution of the present invention: the fixed valve component includes a connecting pipe and a locking knob mechanism, one end of the connecting pipe is fixedly connected to the delivery pipe, and the other end is connected to the locking knob, and the end of the support pipe away from the elastic coated umbrella-shaped bracket cooperates to pass through the connecting pipe.

[0016] As a further solution of the present invention: the locking knob mechanism includes an externally threaded sleeve and a rotating sleeve, the end of the connecting pipe away from the delivery pipe is fixedly connected to the externally threaded sleeve, the rotating sleeve is threadedly connected to the outside of the externally threaded sleeve, the side of the externally threaded sleeve close to the connecting pipe is fixedly connected with a conical silicone sleeve, and the conical silicone sleeve is fitted on the support tube, and the inner ring of the rotating sleeve is fixedly connected with an extrusion sleeve that matches the conical silicone sleeve.

[0017] As a further solution of the present invention: a tip developing mechanism is fixedly mounted on one end of the elastically coated umbrella-shaped bracket away from the supporting tube.

[0018] Beneficial effects of the utility model:

[0019] 1. The present invention uses a support tube to drive the elastic coated umbrella-shaped stent to move along the blood vessel, thereby scraping away thrombi attached to the blood vessel wall. When the support tube drives the elastic coated umbrella-shaped stent to be squeezed and retracted into the delivery tube, the coating distributed on the side of the elastic coated umbrella-shaped stent away from the delivery tube collects the scraped thrombi and brings them into the delivery tube together, thereby preventing the scraped and broken thrombi from flowing into secondary blood vessels and causing embolism risks.

[0020] 2. In the process of moving the support tube relative to the conveying tube, the support tube is positioned in the positioning holes of different positions on the conveying tube by the elastic clamping members, the position of each positioning hole corresponds to the size of the expanded elastic film umbrella support, so that the elastic film umbrella support is positioned and released in multiple sizes, and is convenient for use in blood vessels of various diameters.

[0021] 3. The elastic film umbrella support of the utility model can scrape off the blood clots on the wall of the blood vessel through the silica gel ring at the edge position, and prevent damage to the blood vessel. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further described below with reference to the drawings.

[0023] Figure 1 is the overall structure schematic view of the utility model;

[0024] Figure 2 is the structure schematic view of the elastic film umbrella support when it is fully expanded in the utility model;

[0025] Figure 3 is Figure 2 the enlarged structure schematic view of A in the utility model;

[0026] Figure 4 is the structure schematic view of the elastic film umbrella support when it is fully stored in the conveying tube in the utility model;

[0027] Figure 5 is the structure schematic view of the mutual connection of the conical elastic metal net frames of the elastic film umbrella support in the utility model;

[0028] Figure 6 is the partial section structure schematic view of the cooperation and connection of the support tube and the communication tube in the utility model.

[0029] In the drawing: 1, conveying tube; 2, support tube; 3, elastic film umbrella support; 4, sharp end developing mechanism; 5, elastic clamping member; 6, film body; 7, positioning hole; 8, mounting groove; 9, spring; 10, elastic clamping column; 11, silica gel ring; 12, communication tube; 13, external thread sleeve; 14, rotating sleeve; 15, extrusion sleeve; 16, conical silica gel sleeve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] AsFigures 1-6 As shown in the drawings, a device for removing and collecting pulmonary artery branch vessel thrombus comprises a support tube 2 and a delivery tube 1, the delivery tube 1 penetrates through the support tube 2, the support tube 2 can slide transversely along the delivery tube 1, the delivery tube 1 and the support tube 2 are medical flexible tubes with certain elasticity, which are convenient for moving along the blood vessels, the device further comprises an elastic covered umbrella-shaped stent 3 for scraping the thrombus attached to the blood vessel wall and an elastic clamping piece 5 for positioning the position of the support tube 2 relative to the delivery tube 1; the elastic covered umbrella-shaped stent 3 is fixedly connected to one end of the support tube 2, and the side of the elastic covered umbrella-shaped stent 3 away from the support tube 2 is provided with a covered membrane body 6 for collecting thrombus, before removing the thrombus attached to the branch vessel wall, the support tube 2 needs to drive the elastic covered umbrella-shaped stent 3 to deform and be accommodated in the delivery tube 1, then the delivery tube 1 with the accommodated elastic covered umbrella-shaped stent 3 reaches the position of the thrombus along the blood vessel, then the support tube 2 slides forward relative to the delivery tube 1, so that the elastic covered umbrella-shaped stent 3 extends out and expands in the blood vessel by relying on the elasticity, and the expanded position of the elastic covered umbrella-shaped stent 3 is ensured to exceed the position of the thrombus, then the elastic covered umbrella-shaped stent 3 is pulled back by the support tube 2 to scrape the thrombus attached to the inner wall of the blood vessel, finally the elastic covered umbrella-shaped stent 3 collects the removed thrombus by relying on the covered membrane body 6, and returns to the inside of the delivery tube 1 together with the thrombus, and then the elastic covered umbrella-shaped stent 3 is completely accommodated in the delivery tube 1 again, then the delivery tube 1 and the accommodated elastic covered umbrella-shaped stent 3 are taken out, so as to realize thrombus removal and collection.

[0032] The elastic clamping piece 5 is elastically connected to the support tube 2, a plurality of positioning holes 7 matched with the elastic clamping piece 5 are transversely formed on the delivery tube 1, when the support tube 2 slides a certain distance relative to the delivery tube 1, the elastic covered umbrella-shaped stent 3 can be clamped into the positioning hole 7 at the corresponding position by the elastic clamping piece 5, the positioning hole 7 at each position corresponds to the shape of the elastic covered umbrella-shaped stent 3, which is convenient for the operator to position and open the elastic covered umbrella-shaped stent 3 to the corresponding size and shape, and is convenient for being suitable for various blood vessel diameters.

[0033] As shown in the drawings, Figure 1 and Figure 5 As shown in the drawings, the above-mentioned elastic covered umbrella-shaped stent 3 comprises two groups of mutually connected conical elastic metal mesh frames, and the two groups of conical elastic metal mesh frames are symmetrically distributed, one group of conical elastic metal mesh frames is fixedly connected to the end of the support tube 2, and the covered membrane body 6 is sewn on the conical elastic metal mesh frame away from the support tube 2, when the elastic covered umbrella-shaped stent 3 is expanded, the intersection position of the two conical elastic metal mesh frames abuts against the inner wall of the blood vessel, which is convenient for scraping the thrombus, and when the elastic covered umbrella-shaped stent 3 is pulled back by the support tube 2, the thrombus can be collected and captured by relying on the covered membrane body 6.

[0034] In addition, the film body 6 is a PTFE film with proper size micro-holes for facilitating blood flow and preventing thrombus passing, and the film body 6 can be connected in the same way as the umbrella cloth and the frame of the umbrella structure.

[0035] It should be noted that the conical elastic metal mesh frame is a nickel-titanium alloy structure with strong elasticity, which is heat-set in the released form to form a basket structure. Since the elastic film umbrella-shaped stent 3 is formed by two symmetrical conical elastic metal mesh frames, the stent body can be smoothly released and recovered, and strong radial support force is provided to ensure that the blood vessel wall can be expanded to remove the mural thrombus.

[0036] In addition, the outer edges of the connection positions of the two groups of conical elastic metal mesh frames are surrounded by a silicone ring 11, which facilitates the removal of thrombus on the inner wall of the blood vessel while preventing damage to the blood vessel.

[0037] In order to facilitate the operation of the elastic clamping piece 5 by directly pushing and pulling the support tube 2, the elastic clamping piece 5 includes an elastic clamping column 10, a mounting groove 8 and a spring 9, as shown in Figure 3 and Figure 4 The mounting groove 8 is provided on the outer wall of the support tube 2, one end of the elastic clamping column 10 is slidably inserted into the mounting groove 8, and the elastic clamping column 10 is connected to the mounting groove 8 by the spring 9. The spring 9 can be compressed, the other end of the elastic clamping column 10 is a conical end, and the conical end cooperates with the positioning hole 7. When the conical end of the elastic clamping column 10 is inserted into the corresponding positioning hole 7, if the support tube 2 is pushed and pulled, the inclined wall of the conical end and the inner wall of the positioning hole 7 will be squeezed, and the inclined wall of the conical end will be compressed by the spring 9 in the direction, thereby realizing the sliding storage of the elastic clamping column 10 into the mounting groove 8. When the elastic clamping column 10 gradually separates from the corresponding positioning hole 7, the elastic clamping column 10 is then displaced together with the support tube 2, and when it is displaced to the position of the next positioning hole 7, the elastic clamping column 10 is clamped into the positioning hole 7 at the current position by the elastic force of the spring 9.

[0038] It should be noted that the elastic clamping column 10 can also be an elastic rubber piece, which is then directly fixed and connected to the outer wall of the support tube 2 to complete the relevant positioning operation by extrusion deformation.

[0039] In some specific embodiments, when the support tube 2 is slid to the corresponding position relative to the delivery tube 1 and positioned by the elastic clamping piece 5, so that the elastic film umbrella-shaped stent 3 is expanded to the corresponding form for use, in order to avoid accidental resetting of the elastic film umbrella-shaped stent 3, it is necessary to ensure that the support tube 2 and the delivery tube 1 are completely fixed together, in combination with Figure 1 and Figure 6As shown, the end of the delivery tube 1 away from the elastic membrane umbrella-shaped stent 3 is connected with the support tube 2 through a fixing valve for locking the relative position of the support tube 2 and the delivery tube 1.

[0040] The fixing valve comprises a communication tube 12 and a locking knob mechanism. One end of the communication tube 12 is fixedly connected with the delivery tube 1, and the other end is connected with the locking knob. The end of the support tube 2 away from the elastic membrane umbrella-shaped stent 3 penetrates through the communication tube 12, and the outer diameter of the support tube 2 is equal to the inner diameter of the communication tube 12.

[0041] The locking knob mechanism comprises an external thread sleeve 13 and a rotating sleeve 14. The end of the communication tube 12 away from the delivery tube 1 is coaxially fixedly connected with the external thread sleeve 13, and the inner diameter of the external thread sleeve 13 is larger than the inner diameter of the communication tube 12. The rotating sleeve 14 is threadedly connected on the outside of the external thread sleeve 13. The side of the external thread sleeve 13 close to the communication tube 12 is fixedly connected with a conical silica gel sleeve 16, and the conical silica gel sleeve 16 is fitted on the support tube 2. The inner circle of the rotating sleeve 14 is fixedly connected with an extrusion sleeve 15 matched with the conical silica gel sleeve 16. When it is needed to lock the relative position of the support tube 2 and the communication tube 12 and the delivery tube 1, the rotating sleeve 14 is rotated along the external thread sleeve 13, and the extrusion sleeve 15 is extruded from the outside of the conical silica gel sleeve 16, so that the conical silica gel sleeve 16 is tightly wrapped on the outer wall of the support tube 2, and the position is fixed.

[0042] In some specific embodiments, in order to facilitate the observation of the position of the thrombus inside the blood vessel, the elastic membrane umbrella-shaped stent 3 is kept in the appropriate position. The end of the elastic membrane umbrella-shaped stent 3 away from the support tube 2 is fixedly installed with a sharp end imaging mechanism 4, preferably a medical micro imaging shooting device. The wire or data line thereof can extend through the support tube 2.

[0043] In order to facilitate the understanding of the person skilled in the art to the embodiment of the present scheme, the working principle of the present scheme will be briefly described in combination with specific application scenarios:

[0044] Before the thrombus on the wall of the branch blood vessel is removed, the support tube 2 drives the elastic membrane umbrella-shaped stent 3 to deform and be accommodated inside the delivery tube 1. Then the delivery tube 1 with the accommodated elastic membrane umbrella-shaped stent 3 reaches the position of the thrombus along the blood vessel. Then the support tube 2 is slid forward relative to the delivery tube 1, so that the elastic membrane umbrella-shaped stent 3 is stretched out and expanded in the blood vessel, and the expanded position of the elastic membrane umbrella-shaped stent 3 exceeds the position of the thrombus. Then the elastic membrane umbrella-shaped stent 3 is pulled back through the support tube 2, so that the thrombus attached to the inner wall of the blood vessel is scraped off. Finally, the elastic membrane umbrella-shaped stent 3 returns to the inside of the delivery tube 1 together with the removed thrombus, and the elastic membrane umbrella-shaped stent 3 is completely accommodated in the delivery tube 1 again. Then the delivery tube 1 and the accommodated elastic membrane umbrella-shaped stent 3 are taken out, so that the thrombus is removed and collected.

[0045] And after the support tube 2 slides a certain distance relative to the delivery tube 1, the elastic clamping piece 5 on the support tube 2 is clamped into the positioning hole 7 in the corresponding position, at this time the elastic membrane umbrella-shaped stent 3 is in the corresponding size form, and when the elastic membrane umbrella-shaped stent 3 is fully opened or fully stored, the elastic clamping piece 5 is clamped into the positioning hole 7 in the corresponding position, so that the elastic membrane umbrella-shaped stent 3 is gradually unfolded to the corresponding size form, thereby being suitable for blood vessels of various diameters.

[0046] And after the elastic membrane umbrella-shaped stent 3 is unfolded to the corresponding size form, especially when it is not fully unfolded, in order to avoid the elastic membrane umbrella-shaped stent 3 from being accidentally reset, the fixed valve is controlled to fix and lock the position of the support tube 2 relative to the delivery tube 1, and then the thrombus removal operation is performed, and when the elastic membrane umbrella-shaped stent 3 and the thrombus need to be recycled, the elastic membrane umbrella-shaped stent 3 and the thrombus can be recycled.

[0047] The above describes several embodiments of the utility model in detail, but the embodiments of the utility model are not limited to this, and cannot be considered as limiting the implementation scope of the utility model. Any equivalent changes and improvements within the scope of the utility model application should still belong to the patent coverage scope of the utility model.

Claims

1. A device for clearing and collecting thrombi in pulmonary artery branch vessels, comprising a support tube (2) and a delivery tube (1), wherein the delivery tube (1) passes through the support tube (2), and is characterized in that: Also includes: An elastic coated umbrella-shaped stent (3) for scraping off thrombi attached to the wall of a blood vessel, wherein the elastic coated umbrella-shaped stent (3) is fixedly connected to one end of a support tube (2), and a coating body (6) for collecting thrombi is provided on a side of the elastic coated umbrella-shaped stent (3) away from the support tube (2); An elastic clamp (5) is used to locate the position of the support tube (2) relative to the delivery tube (1); the elastic clamp (5) is elastically connected to the support tube (2); and a plurality of positioning holes (7) cooperating with the elastic clamp (5) are transversely provided on the delivery tube (1).

2. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 1, characterized in that: The elastic membrane-covered umbrella-shaped support (3) comprises two groups of mutually connected conical elastic metal grids, and the two groups of conical elastic metal grids are symmetrically distributed.

3. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 2, characterized in that: The conical elastic metal grid is a nickel-titanium alloy structure.

4. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 2, characterized in that: The outer edges of the positions where the two groups of conical elastic metal grids are connected to each other are surrounded by a silicone ring (11).

5. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 1, characterized in that: The elastic clamp (5) comprises an elastic clamping column (10), a mounting groove (8) and a spring (9); the mounting groove (8) is provided on the outer wall of the support tube (2); one end of the elastic clamping column (10) is slidably inserted into the mounting groove (8), and the elastic clamping column (10) is connected to the mounting groove (8) via the spring (9); the other end of the elastic clamping column (10) is a tapered end, and the tapered end is matched with the positioning hole (7).

6. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 1, characterized in that: A fixed valve component for locking the relative positions of the support tube (2) and the delivery tube (1) is connected between the end of the delivery tube (1) away from the elastic membrane-covered umbrella-shaped bracket (3) and the support tube (2).

7. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 6, characterized in that: The fixed valve component comprises a connecting pipe (12) and a locking knob mechanism, wherein one end of the connecting pipe (12) is fixedly connected to the delivery pipe (1), and the other end is connected to the locking knob, and the end of the support pipe (2) away from the elastic membrane umbrella-shaped bracket (3) cooperates to pass through the connecting pipe (12).

8. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 7, characterized in that: The locking knob mechanism comprises an externally threaded sleeve (13) and a rotating sleeve (14); one end of the connecting pipe (12) away from the delivery pipe (1) is fixedly connected to the externally threaded sleeve (13); the rotating sleeve (14) is threadedly connected to the outside of the externally threaded sleeve (13); a conical silicone sleeve (16) is fixedly connected to the side of the externally threaded sleeve (13) close to the connecting pipe (12); and the conical silicone sleeve (16) is fitted on the support pipe (2); and an extrusion sleeve (15) that matches the conical silicone sleeve (16) is fixedly connected to the inner ring of the rotating sleeve (14).

9. The device for removing and collecting thrombus in pulmonary artery branch vessels according to claim 1, characterized in that: A tip developing mechanism (4) is fixedly mounted on one end of the elastic film-coated umbrella-shaped support (3) away from the support tube (2).

Images