CN214342501U

CN214342501U - Rotary cutting type mechanical thrombus removing catheter device

Info

Publication number: CN214342501U
Application number: CN202023019996.0U
Authority: CN
Inventors: 胡文忠; 韩建超; 丁双喜; 李世文
Original assignee: Shanghai Rongmai Medical Technology Co ltd
Current assignee: Shanghai Rongmai Medical Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-10-08
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a rotary-cut formula machinery thrombus clear away pipe device belongs to blood vessel intervention medical instrument technical field. The suction device comprises a three-way suction connector, a suction inner pipe, a two-way outer pipe connector and an outer pipe; a thrombus rotary cutter is arranged in the pipe orifice at the far end of the outer pipe and comprises a rotary cutting ring and a pair of mounting shafts which are positioned on the same axis and fixed at the upper end and the lower end of the rotary cutting ring, and the circumferential side surface of each mounting shaft is provided with a transmission gear; the pipe wall of the far end of the suction inner pipe is provided with a pair of long slotted holes for accommodating the installation shaft to pass through, one side of each long slotted hole is provided with a rack meshed with the transmission gear of the installation shaft, and when the suction inner pipe moves back and forth relative to the outer pipe, the racks drive the rotary shaver for thrombus to rotate. The large thrombus is cracked by the rotation, cutting and extrusion of the thrombus rotary cutter, and the thrombus is pushed into the suction opening of the suction inner tube, so that the suction opening is prevented from being blocked by the large thrombus, and the taking-out efficiency of the thrombus is obviously improved.

Description

Rotary cutting type mechanical thrombus removing catheter device

Technical Field

The utility model relates to a rotary-cut formula machinery thrombus clears away pipe device belongs to blood vessel and intervenes medical instrument technical field.

Background

One possible risk problem faced by current conventional aspiration catheters is occlusion by thrombus, including high consistency thrombi. Thrombus blockage is most likely to occur at the distal aspiration opening of a conventional aspiration catheter, when a large mass or volume of thrombus is aspirated by negative pressure toward the aspiration opening of a conventional aspiration catheter, if the thrombus is large and dense enough to cover the aspiration opening, the thrombus may block the distal aspiration opening of the aspiration catheter, causing the latter thrombus to not continue to be aspirated into the catheter. Thus, significantly reducing or eliminating the possibility of occlusion of the aspiration catheter aspiration opening or aspiration catheter lumen is also important for effective and reliable thrombus removal during aspiration procedures.

With the development of technology, in recent years, mechanical thrombus removal (PMT) devices have appeared, which are a group of instruments for removing acute and subacute thrombus formation in blood vessels, and the devices adopt dissolving, crushing, suction modes and the like to remove thrombus in blood vessels and restore blood circulation and valve functions. PMT is microtrauma intracavity thrombus clearing device, can clear away the thrombus fast, resumes blood flow, saves valve function, and clinical effect has obtained expert's recognition, becomes the focus of research in recent years. Such as a thrombus removal catheter disclosed in patent CN201780075702.8, an auxiliary jet aspiration thrombus removal catheter disclosed in patent CN201880031836.4 and a method for using the same, and a mechanical thrombus removal device such as a rotational atherectomy device disclosed in patent CN 200880105037.3.

Still further interventional techniques include advancing a suction catheter into the thromboembolism in order to remove it by aspiration (i.e., negative pressure). While generally safe, only relatively soft thromboembolisms are effective. In order to improve the effectiveness of the suction technology, a rotary-cut mechanical thrombus removal catheter device is designed and provided, a thrombus breaking device is arranged at the suction opening of the distal tip of a catheter, thrombus blocked at the suction opening of the catheter can be cut and broken in a rotating mode, and further, the cracked thrombus is discharged to the outside of the body under the action of negative pressure suction, wherein the thrombus breaking device in the catheter and the embodiment of the negative pressure suction catheter system reduce the blocking condition or risk of the suction lumen of the system during use, and meanwhile, the reliability of the system and power transmission is improved.

Disclosure of Invention

The utility model discloses the technical problem that will solve lies in: provides a rotary cutting type mechanical thrombus removing catheter device, which solves the problems of low thrombus taking efficiency and large thrombus blocking catheter existing in the traditional suction catheter.

The utility model discloses the technical problem that will solve takes following technical scheme to realize:

a rotary cutting type mechanical thrombus removing catheter device comprises a three-way suction connector, a suction inner tube, a two-way outer tube connector and an outer tube, wherein the far end of the three-way suction connector is hermetically connected with the near end of the suction inner tube, the far end of the two-way outer tube connector is hermetically connected with the near end of the outer tube, and the inner tube is inserted into the outer tube;

a thrombus rotary cutter is arranged in the tube orifice at the far end of the outer tube, the thrombus rotary cutter comprises a rotary cutting ring and a pair of mounting shafts which are positioned on the same axis and fixed at the upper end and the lower end of the rotary cutting ring, the circumferential side surface of each mounting shaft is provided with a transmission gear, and the tube wall at the far end of the outer tube is provided with a pair of mounting through holes for accommodating the mounting shafts;

the pipe wall of the far end of the suction inner pipe is provided with a pair of long slotted holes for accommodating the installation shaft to pass through, one side of each long slotted hole is provided with a rack meshed with the transmission gear of the installation shaft, the installation shafts at the upper end and the lower end of the thrombus rotary cutter pass through the long slotted holes and then are inserted into the installation through holes, and when the suction inner pipe moves back and forth relative to the outer pipe, the racks drive the thrombus rotary cutter to rotate.

As a preferred example, the proximal end faces of the three-way suction connector and the two-way outer tube connector are both provided with silica gel hemostatic sealing valves, and the suction inner tube is inserted into the outer tube through the silica gel hemostatic sealing valve at the proximal end of the two-way outer tube connector in a sealing manner.

As a preferable example, the outer surface of the pipe orifice at the far end of the outer pipe is provided with an annular groove, the installation through hole is arranged in the annular groove, and the metal developing ring is sleeved in the annular groove.

As a preferred example, the outer tube distal orifice is a beveled tip orifice.

In a preferred embodiment, the thrombus rotary cutter is provided with a groove on the inner side end surface of a pair of mounting shafts, and the rotary cutting ring is insert-welded in the groove of the pair of mounting shafts.

As a preferred example, two mutually perpendicular rotary cutting rings are fixed between a pair of mounting shafts of the rotary thrombus cutter.

The utility model has the advantages that:

(1) the large thrombus is cracked by the rotation, cutting and extrusion of the thrombus rotary cutter, and the thrombus is pushed into the suction opening of the suction inner tube, so that the large thrombus is prevented from blocking the suction opening, and the thrombus taking-out efficiency is obviously improved;

(2) the thrombus rotary cutter is driven to rotate by means of the strong pushing performance of the suction inner tube, and driving force can be reliably transmitted.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of a local structure of the proximal end of the present invention;

fig. 3 is a schematic view of a distal partial structure of the present invention;

FIG. 4 is a schematic view of the installation structure of the metal developing ring of the present invention;

FIG. 5 is a schematic structural view of a thrombectomy device;

FIG. 6 is a schematic view of a rotary atherectomy device with an atherectomy ring;

FIG. 7 is a schematic view of a thrombectomy device with two perpendicular atherectomy rings;

FIG. 8 is a schematic view of the structure of a slotted hole of the inner suction tube;

FIG. 9 is a schematic cross-sectional view of a thrombectomy device drive configuration;

FIG. 10 is a schematic structural view of the connection drive of the thrombectomy device and the inner aspiration tube;

FIG. 11 is a schematic view of the thrombus being sucked to the suction opening according to the present invention;

FIG. 12 is a schematic view showing the construction of the present invention for starting the rotation to break up the thrombus and sucking the thrombus into the suction inner tube.

In the figure: the device comprises a three-way suction connector 1, a suction inner tube 2, a slotted hole 201, a rack 202, a two-way outer tube connector 3, an outer tube 4, an installation through hole 401, an annular groove 402, a silica gel hemostatic sealing valve 5, a thrombectomy cutter 6, a rotary cutting ring 601, an installation shaft 602, a transmission gear 603, a metal developing ring 7 and a thrombus 8.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.

For ease of description, the following description uses the terms "proximal" and "distal", where proximal refers to the end closer to the operator and distal refers to the end further from the operator.

Examples

As shown in fig. 1 and fig. 2, a rotary cutting type mechanical thrombus removing catheter device comprises a three-way suction connector 1, a suction inner tube 2, a two-way outer tube connector 3 and an outer tube 4, wherein the far end of the three-way suction connector 1 is hermetically connected with the near end of the suction inner tube 2, the far end of the two-way outer tube connector 3 is hermetically connected with the near end of the outer tube 4, and the inner tube 2 is inserted into the outer tube 4;

the proximal end faces of the three-way suction connector 1 and the two-way outer connector 3 are both provided with silica gel hemostatic sealing valves 5, and the suction inner tube 2 is inserted into the outer tube 4 through the silica gel hemostatic sealing valve 5 at the proximal end of the two-way outer connector 3 in a sealing manner. The proximal end of the suction inner tube 2 is connected with an external negative pressure suction device.

As shown in fig. 3-10, a thrombus rotary cutter 6 is arranged in the distal end orifice of the outer tube 4, the thrombus rotary cutter 6 includes a rotary cutting ring 601 and a pair of mounting shafts 602 located on the same axis and fixed at the upper and lower ends of the rotary cutting ring 601, the circumferential side surface of the mounting shafts 602 is provided with driving teeth 603, and the distal end tube wall of the outer tube 4 is provided with a pair of mounting through holes 401 for accommodating the mounting shafts 602; the distal orifice of the outer tube 4 can be a tip orifice formed by beveling or a flat orifice. The rotary cutting ring 601 is a circular cutting knife, or a cutting knife with other shapes such as rectangle, ellipse, etc. which can freely rotate in the orifice of the outer tube 4.

The distal tube wall of the suction inner tube 2 is provided with a pair of long slots 201 for accommodating the mounting shaft 602 to pass through, one side of the long slot 201 is provided with a rack 202 meshed with the transmission teeth 603 of the mounting shaft 602, the mounting shaft 602 at the upper end and the lower end of the rotary shaver 6 passes through the long slot 201 and then is inserted into the mounting through hole 401, and when the suction inner tube 2 moves back and forth relative to the outer tube 4, the rack 202 drives the rotary shaver 6 to rotate.

The outer surface of the far-end pipe orifice of the outer pipe 4 is provided with an annular groove 402, the mounting through hole 401 is arranged in the annular groove 402, the annular groove 402 is internally sleeved with a metal developing ring 7, the position can be developed during operation, and the mounting shaft 602 for the outer pipe 4 and the thrombectomy cutter 6 can be sealed.

One or two rotary cutting rings 601 are fixed between a pair of mounting shafts 602 of the rotary thrombus cutter 6: as shown in fig. 6, the thrombus rotary cutter 6 has a groove on the inner end surface of the pair of mounting shafts 602, and the rotary cutting ring 601 is embedded and welded in the groove of the pair of mounting shafts 602; referring to fig. 7, two cutting rings 601 perpendicular to each other are fixed between a pair of mounting shafts 602 of the thrombectomy device 6. The multiple rotary cutting rings 601 can improve crushing and extruding efficiency.

The using method comprises the following steps:

as shown in fig. 11, during the operation, the blood vessel is punctured, a guide wire (not shown) is introduced to completely pass through the lesion thrombus 8, the catheter device keeps the outer tube 4 still by leading the distal tip of the outer tube 4 and the thrombectomy cutter 6 inside the outer tube to approach the position 1-2cm near the thrombus 8 under the guide of the guide wire, the guide wire is withdrawn, the external negative pressure suction device is started to provide negative pressure for the inner cavity of the suction inner tube 2, and the thrombus 8 is sucked to the suction opening of the distal tip of the outer tube 4 under the action of the negative pressure;

as shown in fig. 12, the external driving device or the doctor operates the three-way suction connector 1 to drive the suction inner tube 2 to reciprocate linearly at a certain frequency, so that the suction inner tube 2 drives the rotary shaver 6 to reciprocate rotationally at a certain frequency, and the circular rotary cutting ring 601 on the rotary shaver 6 has a smaller diameter, so as to cut and fragment the thrombus 8 tissue easily; when thrombus 8 is sucked to the suction opening of the distal tip of the outer tube 4 and blocks the suction opening, the big thrombus 8 blocked at the suction opening is cut and broken by the rotary round rotary-cut ring 601, and then the small thrombus 8 after being cracked is conveyed to the proximal end of the three-way suction connector 1 by the suction inner tube 2 under the negative pressure suction effect, so as to be discharged out of the human body; after the thrombus 8 is sucked, all the devices are removed from the human body together.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a rotary-cut formula machinery thrombus removal catheter device, it includes tee bend suction connector (1), suction inner tube (2), two-way outer tube connector (3) and outer tube (4), tee bend suction connector (1) distal end and suction inner tube (2) near-end sealing connection, two-way outer tube connector (3) distal end and outer tube (4) near-end sealing connection, inner tube (2) insert in outer tube (4), its characterized in that:

a thrombus rotary cutter (6) is arranged in a far-end pipe orifice of the outer pipe (4), the thrombus rotary cutter (6) comprises a rotary cutting ring (601) and a pair of mounting shafts (602) which are positioned on the same axis and fixed at the upper end and the lower end of the rotary cutting ring (601), the circumferential side surface of each mounting shaft (602) is provided with a transmission gear (603), and the far-end pipe wall of the outer pipe (4) is provided with a pair of mounting through holes (401) for accommodating the mounting shafts (602);

the pipe wall of the far end of the suction inner pipe (2) is provided with a pair of long slotted holes (201) for accommodating the installation shaft (602) to pass through, one side of each long slotted hole (201) is provided with a rack (202) meshed with the transmission teeth (603) of the installation shaft (602), the installation shaft (602) at the upper end and the lower end of the thrombus rotary cutter (6) passes through the long slotted hole (201) and then is inserted into the installation through hole (401), and when the suction inner pipe (2) moves back and forth relative to the outer pipe (4), the rack (202) drives the thrombus rotary cutter (6) to rotate.

2. The rotary-cut mechanical thrombus removal catheter device according to claim 1, wherein an annular groove (402) is formed on the outer surface of the distal end nozzle of the outer tube (4), the mounting through hole (401) is formed in the annular groove (402), and the metal developing ring (7) is sleeved in the annular groove (402).

3. The rotary-cut mechanical thrombus removal catheter device according to claim 1, wherein the distal nozzle of the outer tube (4) is a tip nozzle formed by beveling.

4. The rotary-cut mechanical thrombus removal catheter device according to claim 1, wherein the inner side end surfaces of a pair of mounting shafts (602) of the rotary-cut thrombus device (6) are provided with grooves, and the rotary-cut ring (601) is insert-welded in the grooves of the pair of mounting shafts (602).

5. The rotary-cut mechanical thrombus removal catheter device according to claim 1, wherein two mutually perpendicular rotary-cut rings (601) are fixed between a pair of mounting shafts (602) of the rotary-cut thrombus device (6).

6. The rotary-cut mechanical thrombus removal catheter device according to claim 1, wherein the proximal end faces of the three-way suction connector (1) and the two-way outer tube connector (3) are respectively provided with a silica gel hemostatic sealing valve (5), and the suction inner tube (2) is inserted into the outer tube (4) through the silica gel hemostatic sealing valve (5) at the proximal end of the two-way outer tube connector (3) in a sealing manner.