CN220327489U - Vessel intracavity foreign matter catcher - Google Patents

Abstract

The utility model discloses a device for capturing foreign matters in a blood vessel cavity, which comprises a guide wire passing system, a capturing system and a recovery sheath pipe system, wherein the guide wire passing system comprises a conical head, an inner pipe and a joint; the recycling sheath system comprises a screw rod, a front handle, a rear handle, an outer tube joint, an outer tube and a lock sleeve structure, wherein the rear handle is movably arranged on the outer wall of the screw rod, the lock sleeve structure is arranged between the rear handle and the screw rod, the outer tube joint is limited in a screw rod cavity and moves along with the rear handle, and the far end of the outer tube extends to the conical head. The utility model provides a device for capturing foreign matters in a blood vessel cavity, which can directly reach a target position along a guide wire, is convenient for capturing and recycling the foreign matters and has the characteristics of simplicity and convenience in operation and high efficiency.

Description

Vessel intracavity foreign matter catcher

Technical Field

The utility model relates to an interventional medical instrument, in particular to a vessel cavity foreign matter catcher which can catch, recycle and take out the foreign matters in a vessel.

Background

Intravascular foreign bodies (intravascular foreign body, IFB) are common in iatrogenic foreign bodies, and invasive foreign bodies also occur at times, which are now a common clinical problem. IFB may cause embolism, affect important organ functions of heart, etc., and even cause death of patient, and need to be intervened in time. The removal of the IFB has been accomplished through surgery. After the right auricle guide wire stump is taken out from the first percutaneous vascular intervention mode of 1964, the technology has been widely developed, the success rate can reach 92.1 percent, and the complications are less, so that the method can replace surgical operation.

With the innovation of medical materials, the application of percutaneous vascular intervention technology in IFB recovery is continuously innovated and improved. The most common device for taking out the IFB is a catcher at present, has high success rate and fewer complications, and becomes the preferred scheme for recovering the foreign matters in the blood vessel.

For example, the existing registration certificate is numbered as a catcher for national mechanical infusion 20183770229, and the product name thereof is an intravascular foreign matter snare. The product consists of a extractor with three ferrules, a guide catheter, an introducer and a torque device, wherein the foreign matters in the blood vessel are caught through 3 fixed-length snare loops, and the foreign matters in the blood vessel are recovered through the guide catheter. In the clinical use process, a proper expander and a proper guide sheath tube are required to be additionally selected, after the guide wire is matched with the expander to reach the target position, the expander is withdrawn, the snare is guided in, and the operation process is complicated and low in efficiency, and can not directly reach the target position along the guide wire. And because the single lantern ring scale, there is the risk that can't catch the foreign matter.

Disclosure of Invention

Aiming at the current state of the art, the utility model provides the device for capturing the foreign matters in the blood vessel cavity, which can directly reach the target position along the guide wire, is convenient for capturing and recycling the foreign matters and has the characteristics of simple operation and high efficiency.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a ware is arrested to endovascular foreign matter, includes arrest system and recovery sheath system, its characterized in that: the guide wire passing system comprises a hollow conical head, an inner tube for the guide wire to pass through and a hollow joint, wherein one end of the inner tube is connected with the conical head, and the other end of the inner tube is connected with the joint;

the capturing system comprises a capturing far-end structure and a capturing near-end structure, the capturing far-end structure comprises a plurality of capturing rings, a limiting disc and a pushing disc, an inner tube penetrates through the limiting disc and the pushing disc, meanwhile, through holes with the number being matched with that of the capturing rings are formed in the limiting disc, each capturing ring penetrates through a corresponding through hole in the limiting disc and is connected with the pushing disc, the capturing near-end structure comprises a pushing slide rod sleeved at one end outside the inner tube and fixedly connected with a connector, a pushing slide block is slidably arranged on the pushing slide rod, a pushing rod is connected between the pushing slide block and the pushing disc, and a safety buckle is sleeved outside the pushing slide rod and positioned between the connector and the pushing slide block;

the recycling sheath system comprises a screw rod, a front handle, a rear handle, an outer tube joint, an outer tube and a lock sleeve structure, wherein a screw rod cavity used for an inner tube to penetrate is formed in the screw rod, the front handle and the rear handle are sleeved outside the screw rod, the front handle and the screw rod are fixedly connected with each other at the far end, the screw rod is near end and a pushing slide rod are fixedly connected with each other, the rear handle is movably arranged on the outer wall of the screw rod, the lock sleeve structure is arranged between the rear handle and the screw rod and used for locking and unlocking the rear handle, the outer tube joint is limited in the screw rod cavity and moves along with the rear handle, the outer tube is sleeved outside the inner tube, the near end of the outer tube is fixedly connected onto the outer tube joint, and the far end of the outer tube extends to the conical head to be used for wrapping a capturing ring.

As an improvement, a group of protrusions which are oppositely arranged are formed at the proximal end of the outer tube joint, a limiting groove for limiting the protrusions is formed on the inner side wall of the screw cavity, and a gap for the protrusions of the outer tube joint to pass through is formed on the outer side wall of the screw.

The recycling sheath pipe system further comprises a middle pipe, a middle pipe joint, a side joint and a sealing ring, wherein a pushing rod support used for being connected with a pushing rod is fixedly arranged at the proximal end of a screw cavity of a screw, the middle pipe joint is arranged at the proximal end of the screw cavity, the middle pipe is sleeved outside the inner pipe and positioned in the outer pipe, the proximal end of the middle pipe is fixedly connected to the middle pipe joint, an interference-free gap exists between the distal end of the middle pipe and the pushing disc, the interference-free gap meets the requirement that the pushing disc does not interfere with the distal end of the middle pipe after the limit motion in the proximal direction, a pushing rod channel used for allowing a pushing rod to pass through is formed in the side wall of the middle pipe, the outer pipe joint is arranged on the outer wall of the middle pipe in a sliding mode, the side joint is connected to the middle pipe joint, the side joint is fixedly connected with a three-way valve with an extension pipe, and the sealing ring is arranged between the proximal section of the middle pipe joint and the pushing rod support.

The lock sleeve structure comprises an unlocking sleeve, a lock tongue, a spring and a spring connector, wherein the spring connector is arranged inside the rear handle, one end of the spring is connected to the spring connector, the lock sleeve is arranged in the screw cavity and sleeved outside the screw, the unlocking sleeve is arranged on the rear handle and sleeved outside the lock sleeve, the spring sleeve is arranged outside the lock sleeve, the other end of the spring is abutted against the unlocking sleeve, the lock tongue is arranged between the lock sleeve and the screw and is used for locking with the screw, and spiral teeth for screwing with the screw are formed on the lock tongue.

Further improved, the distal end of the front handle is provided with a stress diffusion joint.

Compared with the prior art, the utility model has the advantages that: the capturing ring is pre-compressed and loaded in the capturing system, a clinician pierces a target blood vessel by using a standard Seldinger technology, a guide wire is placed at a target position, the capturing device penetrates the guide wire from a section of the conical head, the capturing device is conveyed to a position slightly exceeding the target position along the guide wire, and then the rear handle is rotated until the capturing ring starts to leak out of the outer tube; then, the catching ring is used for catching the foreign matters in the blood vessel, if the broken guide wire appears, the safety buckle can be removed at the moment, and the sliding block is pushed to move towards the proximal direction to adjust the size of the catching ring until the foreign matters are completely caught; after the foreign matter is completely grasped, the sliding block is moved and pushed in the distal direction, the size of the snare loop is reduced, and the foreign matter can be firmly fixed; finally, the rear handle is rotated in the opposite direction to drive the outer tube to move forward, the capturing ring gradually enters the outer tube, the unlocking sleeve button is pressed, the spring is compressed, the lock tongue is loosened, the rear handle is pulled forward, and the outer tube completely wraps the capturing ring at the moment, so that foreign matters are recovered.

Drawings

FIG. 1 is a schematic view of a device for catching foreign matters in a blood vessel lumen according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a guidewire passing system in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the far-end structure of the capturing system according to the embodiment of the present utility model;

FIG. 4 is a schematic view of the proximal end of the capture system according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a limiting plate according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the structure of a recovery sheath system according to an embodiment of the present utility model;

FIG. 7 is a partial cross-sectional view at A-A of FIG. 6;

FIG. 8 is a schematic view of a jacket structure according to an embodiment of the present utility model;

FIG. 9 is a schematic view of the latch bolt of FIG. 8;

FIG. 10 is a schematic view of the structure of FIG. 8 with the unlocking sleeve removed;

FIG. 11 is a schematic view of the catcher reaching a target location along a guide wire in an embodiment of the present utility model;

FIG. 12 is a schematic view of a quick release capture ring state of the catcher in an embodiment of the present utility model;

FIG. 13 is a schematic view of the construction of the catcher in a state after releasing the catch ring in an embodiment of the present utility model;

fig. 14 is a schematic view showing a structure of a recollection state of the catcher catch ring in the embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 14, the intra-lumen foreign object catcher in the present embodiment comprises a guide wire passing system 1, a catching system 2, a recovery sheath system 3, a stress diffusion joint 5, a safety buckle 4 and a three-way valve with an extension tube 6.

Wherein, as shown in fig. 2, the guide wire passing system 1 comprises a hollow conical head 101, an inner tube 102 for passing the guide wire 11, and a hollow joint 103, wherein one end of the inner tube 102 is connected with the conical head 101, and the other end of the inner tube 101 is connected with the joint 103. In order to reduce the damage to blood vessels in the using process, the head end of the conical head 101 is smooth and is in conical treatment.

As shown in fig. 3 to 5, the capturing system 2 includes a capturing distal end structure and a capturing proximal end structure, the capturing distal end structure includes a plurality of capturing rings 201, a limiting disc 204 and a pushing disc 202, the inner tube 102 passes through the limiting disc 204 and the pushing disc 202, meanwhile, through holes 2041 which are matched with the capturing rings 201 in number are formed in the limiting disc 204, and each capturing ring 201 passes through a corresponding through hole 2041 in the limiting disc 204 and is connected with the pushing disc 202, as shown in fig. 3 and 5; the capturing proximal end structure comprises a pushing slide rod 203 sleeved at one end outside the inner tube 102 and fixedly connected with the joint 103, a pushing slide block 205 is slidably arranged on the pushing slide rod 206, a pushing rod 203 is connected between the pushing slide block 205 and the pushing disc 202, and a safety buckle 4 is sleeved outside the pushing slide rod 206 and positioned between the joint 103 and the pushing slide block 205, as shown in fig. 4.

With continued reference to fig. 6 and 7, the recovery sheath system 3 includes a screw 304, a front handle 308, a rear handle 310, an outer tube joint 307, an outer tube 301, and a lock sleeve structure, wherein a screw cavity for the inner tube 102 to pass through is formed in the screw 304, the rear handle 310 of the front handle 308 is sleeved outside the screw 304, the front handle 308 is fixedly connected with the distal end of the screw 304, the proximal end of the screw 304 is fixedly connected with the pushing slide rod 203, the rear handle 310 is movably arranged on the outer wall of the screw 304, the lock sleeve structure is arranged between the rear handle 310 and the screw 304 for locking and unlocking the rear handle 310, the outer tube joint 307 is limited in the screw cavity and moves along with the rear handle 310, the outer tube 301 is sleeved outside the inner tube 102, the proximal end of the outer tube 301 is fixedly connected to the outer tube joint 307, and the distal end of the outer tube 301 extends to the conical head 101 for wrapping the capturing ring 201. Meanwhile, in order to prevent stress from being generated, a stress diffusion joint 5 is provided at the distal end of the front handle 308, as shown in fig. 1.

Further, in the embodiment of the present utility model, as shown in fig. 6 and 10, the connection between the outer tube joint 307 and the screw 304 is such that a set of protrusions 3071 are formed at the proximal end of the outer tube joint 307, a limit groove for limiting the protrusions 3071 is formed on the inner side wall of the screw cavity, and a gap 3041 for the passage of the outer tube joint protrusions 3071 is formed on the outer side wall of the screw 304.

In addition, in the embodiment of the present utility model, the recovery sheath system 3 further includes a middle tube 306, a middle tube joint 302, a side joint 305 and a sealing ring 303, a pushing slide bar bracket 2061 for connecting with the pushing slide bar 206 is fixedly disposed at the proximal end of the screw cavity of the screw 304, the middle tube joint 302 is disposed at the proximal end of the screw cavity, the middle tube 306 is sleeved outside the inner tube 102 and is located in the outer tube 301, the proximal end of the middle tube 306 is fixedly connected to the middle tube joint 302, an interference-free gap exists between the distal end of the middle tube 306 and the pushing disc 202, the interference-free gap does not interfere with the distal end of the middle tube 306 after the pushing disc 202 moves towards the proximal end limit, a pushing bar channel for the pushing bar 203 to pass through is opened on the side wall of the middle tube 30, the outer tube joint 307 is slidably disposed on the outer wall of the middle tube 306, the side joint 305 is connected to the middle tube joint 302, the side joint 305 is fixedly connected with the three-way valve 6 with the extension tube, and the sealing ring 303 is disposed between the proximal section of the middle tube joint 302 and the pushing slide bar bracket 2061.

The outer tube 301 is a polymer tube with a three-layer structure, the outer layer is made of a polymer material, the middle layer is a metal layer, the outer tube can be of a woven or wound spring structure, and the inner layer is made of PTFE material. The outer tube 301 is wrapped around the middle tube 306 at its distal end, in contact with the conical head 101 (in the initial state), and is fixedly connected to the outer tube fitting 307 at its proximal end. The middle tube 306 may be made of medical PP or HDPE.

Meanwhile, in the embodiment of the utility model, the side connector 305 is arranged on the middle pipe connector 302 and is fixedly connected with the three-way valve 6 with the extension pipe, so that the inner cavity is convenient for liquid to pass through. The liquid injected into the system through the injection port with the extension tube three-way valve 6 flows into the outer tube 301 through the middle tube fixedly connected with the middle tube joint, and can play a role in flushing the whole inner cavity of the sheath tube. And a sealing ring 303 is arranged on the proximal end of the middle pipe joint 302 and the bracket of the pushing slide rod 206 for preventing the leakage of the injection.

In addition, in the embodiment of the present utility model, please continue to refer to fig. 8 to 10, the lock sleeve structure includes an unlocking sleeve 309, a lock sleeve 311, a lock tongue 31, a spring 312 and a spring joint 313, the spring joint 313 is disposed inside the rear handle 310, one end of the spring 312 is connected to the spring joint 313, the lock sleeve 311 is disposed in the screw cavity and sleeved outside the screw 304, the unlocking sleeve 309 is disposed on the rear handle 310 and sleeved outside the lock sleeve 311, the spring 312 is sleeved outside the lock sleeve 311, the other end of the spring 312 is abutted against the unlocking sleeve 309, the lock tongue 314 is disposed between the lock sleeve 311 and the screw 304 for locking with the screw 304, and a helical tooth 3141 for screwing with the screw 304 is formed on the lock tongue 314. The screw 304 has threads on the surface, which are respectively matched with the lock tongue 314, the lock sleeve 311 and the unlocking sleeve 309, so as to realize the rotation of the rear handle 310. Referring to fig. 9, the bottom of the locking tongue 314 has a helical tooth 3141 that mates with the threaded rod 304.

In order to realize the rapid movement of the rear handle 310, the unlocking sleeve 309 button can be pulled backwards, the unlocking sleeve 309 compresses the spring 312, and at the moment, the lock tongue 314 between the lock sleeve 311 and the screw 304 is loosened, so that the rear handle 310 is driven to move backwards, the rear handle 310 and the part of the outer tube joint 307, which is close to the bulge 3071, are limited, so that the outer tube joint 307 is driven to move backwards, and the outer tube joint 307 drives the outer tube 301 to move backwards, so that the rapid release of the capturing ring 201 is realized.

With continued reference to fig. 11-14, the capturing ring 201 is pre-compressed and loaded in the capturing system 2, the clinician uses standard seldinger technique to puncture the target blood vessel, places a guide wire 11 at the target position, penetrates the capturing device from a section of the conical head 101 into the guide wire 11, and conveys the capturing device to a position slightly beyond the target position along the guide wire 11, then rotates the rear handle 310 until the capturing ring 201 begins to leak out of the outer tube 301, in a further scheme, in order to achieve rapid movement of the rear handle 310, the unlocking sleeve 309 button is pulled backwards, the unlocking sleeve 309 compresses the spring 312, at this time, the lock sleeve 311 and the bolt 314 between the screw rod 304 are loosened, thereby driving the rear handle 310 to move backwards, the rear handle 310 and the proximal end of the outer tube connector 307 have a limit, thereby driving the outer tube connector 307 to move backwards, and the outer tube connector 307 drives the outer tube 301 to move backwards, thereby achieving rapid release of the capturing ring 201; then, the catching ring 201 is used to catch the foreign matters in the blood vessel, if the broken guide wire 111 appears, the safety buckle 4 can be removed at the moment, and the pushing sliding block 205 moves towards the proximal direction to adjust the size of the catching ring 201 until the foreign matters are completely caught; after the foreign matter is completely caught, the sliding block 205 is moved and pushed in the distal direction, the size of the snare loop of the catching loop 201 is reduced, and the foreign matter can be firmly fixed; finally, the rear handle 310 is rotated in the opposite direction to drive the outer tube 301 to move forward, the capturing ring 201 gradually enters the outer tube 301, the unlocking sleeve 309 button is pressed afterwards, the spring 312 is compressed, the lock tongue 314 is loosened, the rear handle 310 is pulled forwards, and the outer tube 301 completely wraps the capturing ring 201 at the moment, so that foreign matter recovery is achieved.

Claims (5)

1. The utility model provides a ware is arrested to endovascular foreign matter, includes arrest system (2) and recovery sheath pipe system (3), its characterized in that: the guide wire passing system (1) comprises a hollow conical head (101), an inner tube (102) used for the guide wire (11) to pass through, and a hollow joint (103), one end of the inner tube (102) is connected with the conical head (101), and the other end of the inner tube (102) is connected with the joint (103);

the capturing system (2) comprises a capturing far-end structure and a capturing near-end structure, the capturing far-end structure comprises a plurality of capturing rings (201), limiting plates (204) and pushing plates (202), the inner tube (102) penetrates through the limiting plates (204) and the pushing plates (202), meanwhile, through holes (2041) which are matched with the capturing rings (201) in number are formed in the limiting plates (204), each capturing ring (201) penetrates through the corresponding through hole (2041) in the limiting plate (204) and is connected with the pushing plates (202), the capturing near-end structure comprises a pushing sliding rod (206) which is sleeved at one end outside the inner tube (102) and fixedly connected with the joint (103), a pushing sliding block (205) is slidably arranged on the pushing sliding rod (206), a pushing rod (203) is connected between the pushing sliding block (205) and the pushing plates (202), and the safety buckle (4) is sleeved outside the pushing sliding rod (206) and is positioned between the joint (103) and the pushing sliding block (205);

retrieve sheath system (3) including screw rod (304), preceding handle (308), back handle (310), outer tube joint (307), outer tube (301), lock sleeve structure, be formed with the screw rod die cavity that is used for inner tube (102) to pass in screw rod (304), preceding handle (308) and back handle (310) cover are located screw rod (304) outside, preceding handle (308) and screw rod (304) distal end fixed connection, screw rod (304) proximal end and promotion slide bar (206) fixed connection, back handle (310) remove to set up on screw rod (304) outer wall, lock sleeve structure sets up and is used for realizing locking and unblock to back handle (310) between back handle (310) and screw rod (304), outer tube joint (307) are spacing in the screw rod die cavity and follow back handle (310) and remove, outer tube (301) cover is located inner tube (102) outside, the proximal end fixed connection of outer tube (301) is on outer tube joint (307), the distal end of outer tube (301) extends to conical head (101) department and is used for wrapping up to snaring (201).

2. The endovascular foreign object trap of claim 1, wherein: a group of protrusions (3071) which are oppositely arranged are formed at the proximal end of the outer tube joint (307), a limiting groove for limiting the protrusions (3071) is formed on the inner side wall of the screw cavity, and a gap (3041) for the protrusions (3071) of the outer tube joint (307) to pass through is formed on the outer side wall of the screw (304).

3. The endovascular foreign object trap of claim 1, wherein: the recycling sheath system (3) further comprises a middle pipe (306), a middle pipe joint (302), side joints (305) and a sealing ring (303), a pushing rod support (2061) used for being connected with a pushing rod (206) is fixedly arranged at the proximal end of a screw cavity of the screw (304), the middle pipe joint (302) is arranged at the proximal end of the screw cavity, the middle pipe (306) is sleeved outside the inner pipe (102) and is positioned in the outer pipe (301), the proximal end of the middle pipe (306) is fixedly connected to the middle pipe joint (302), an interference-free gap exists between the distal end of the middle pipe (306) and the pushing disc (202), the interference-free gap does not interfere with the distal end of the middle pipe (306) after the pushing disc (202) moves towards the limit in the proximal direction, a pushing rod channel used for enabling a pushing rod (203) to penetrate is formed in the side wall of the middle pipe (306), the outer pipe joint (307) is arranged on the outer wall of the middle pipe (306) in a sliding mode, the side joint (305) is connected to the middle pipe joint (302), the side joint (305) is fixedly connected to the three-way valve (303), and the side joint (303) is arranged between the middle pipe joint (302) and the pushing rod support (2061).

4. The endovascular foreign object trap of claim 1, wherein: the lock sleeve structure comprises an unlocking sleeve (309), a lock sleeve (311), a lock tongue (314), a spring (312) and a spring joint (313), wherein the spring joint (313) is arranged inside a rear handle (310), one end of the spring (312) is connected to the spring joint (313), the lock sleeve (311) is arranged in a screw cavity and sleeved outside a screw (304), the unlocking sleeve (309) is arranged on the rear handle (310) and sleeved outside the lock sleeve (311), the spring (312) is sleeved outside the lock sleeve (311), the other end of the spring (312) is abutted against the unlocking sleeve (309), the lock tongue (314) is arranged between the lock sleeve (311) and the screw (304) and used for locking with the screw (304), and spiral teeth (3141) used for screwing with the screw (304) are formed on the lock tongue (314).

5. The endovascular foreign object trap of claim 1, wherein: the distal end of the front handle (308) is provided with a stress diffusion joint (5).