CN112717260B

CN112717260B - Far-end umbrella protection system

Info

Publication number: CN112717260B
Application number: CN202011312549.6A
Authority: CN
Inventors: 许永松; 吴健; 秦川; 穆磊; 唐航
Original assignee: BEIJING TAIJIE WEIYE TECHNOLOGY CO LTD
Current assignee: Beijing Taijieweiye Technology Co.,Ltd.
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-10-21
Anticipated expiration: 2040-11-20
Also published as: CN112717260A

Abstract

The invention relates to a remote umbrella protection system; comprises a conveying sheath tube and a blood vessel far-end protector arranged in the conveying sheath tube; the blood vessel far-end protector comprises a far-end spring, a far-end guide wire, a flexible corrugated pipe and a near-end guide wire which are sequentially connected, anti-untwisting wires distributed along the length direction of the flexible corrugated pipe are arranged in the flexible corrugated pipe and fixed in the flexible corrugated pipe, the hardness of the far-end guide wire is smaller than that of the near-end guide wire, and a plurality of annular flexible unfolding elastic sheets are distributed on the outer wall of the flexible corrugated pipe; the flexible corrugated pipe is sleeved with a conical net basket with an opening at the bottom surface, the conical end of the net basket is connected with the far-end guide wire, and any point on the circumference of the opening end of the net basket is connected with the near-end guide wire. The distal end umbrella system can solve the too big thrombus of volume that exists among the prior art and gather the narrow department of establishment basket, easily causes the basket to take place deformation, influences the interception effect of basket, and too much massive thrombus is piled up in the narrow department of basket, influences the recovery of basket.

Description

Far-end umbrella protection system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a far-end protective umbrella system.

Background

Carotid angioplasty and stent implantation are interventional therapies that use balloon catheters, stents, and other devices to eliminate or reduce stenosis and thrombosis of the carotid artery and improve the perfusion of the blood flow of organs in the blood supply area of the carotid artery. Due to its advantage of minimal invasion, it has been developed rapidly, especially in China, the popularity of carotid artery stent implantation (CAS) is more extensive, even surpassing Carotid Endarterectomy (CEA).

In the carotid artery operation process, usually, the dropping of plaque or embolus can occur, and the infarction of a far-end blood vessel is easily caused, and patent CN 20159595959U provides an embolism protector for protecting a cerebral blood vessel, which is provided with an umbrella bag, can effectively capture thrombus, and can effectively protect the cerebral blood vessel in the operation process. However, in the actual clinical operation process, due to the arrangement of the umbrella stand, the umbrella bag is difficult to pass through a special tortuous or severely calcified narrow lesion part, so that the operation is failed. Patent CN201010262495.7 discloses a thrombus capture device, adopts the basket of weaving to replace the umbrella package, and the basket of net weaving has very big deformability, for the umbrella package, more makes things convenient for the removal in the blood vessel. Although the flexibility of basket compare the umbrella package is grow, but has sacrificed the rigidity, if the thrombus is too much or the volume is too big, gathers the narrow department of establishment basket, easily causes the basket to take place to deform, influences the interception effect of basket, and too much massive thrombus is piled up in the narrow department of basket, can influence the recovery of basket.

Therefore, the present invention is directed to the above problems and it is an urgent need to provide a remote umbrella system.

Disclosure of Invention

The invention aims to provide a far-end protective umbrella system, which solves the problems that in the prior art, if too much thrombus or too large thrombus is gathered to a narrow part of a woven basket, the basket is easy to deform, the interception effect of the basket is influenced, and too much massive thrombus is gathered to the narrow part of the basket, so that the recovery of the basket is influenced.

The invention provides a far-end protective umbrella system, which comprises a conveying sheath, a blood vessel far-end protector arranged in the conveying sheath; the blood vessel far-end protector comprises a far-end spring, a far-end guide wire, a flexible corrugated pipe and a near-end guide wire which are sequentially connected, wherein anti-unwinding wires distributed along the length direction of the flexible corrugated pipe are arranged in the flexible corrugated pipe, the anti-unwinding wires are fixed in the flexible corrugated pipe, the hardness of the far-end guide wire is smaller than that of the near-end guide wire, a plurality of annular flexible unfolding elastic sheets are distributed on the outer wall of the flexible corrugated pipe at intervals along the length direction, and one ends of the flexible unfolding elastic sheets are connected with the outer wall of the flexible corrugated pipe; the flexible corrugated pipe is sleeved with a conical basket with an opening at the bottom, the conical end of the basket is connected with the far-end guide wire, any point on the circumference of the opening end of the basket is connected with the near-end guide wire, and the maximum outer diameter of each flexible unfolding elastic sheet when unfolded is smaller than the inner diameter of the basket at the corresponding position when unfolded.

Preferably, the anti-unwinding filaments are made of single or double filaments; the diameter of the far end of the anti-unwinding wire is smaller than that of one end of the far-end guide wire adjacent to the anti-unwinding wire, and the diameter of the near end of the anti-unwinding wire is smaller than that of one end of the near-end guide wire adjacent to the anti-unwinding wire; the diameter of the anti-unwinding yarn is 0.02-0.08mm.

Preferably, the outer diameters of the flexible unfolding springs when unfolded are equal.

Preferably, the outer diameter of each flexible unfolding spring when unfolded increases from the distal spring to the proximal guide wire.

Preferably, each flexible unfolding elastic sheet is provided with a plurality of reinforcing ribs at intervals along the length.

Preferably, the material of the flexible unfolding elastic sheet is nickel-titanium alloy.

Preferably, the reinforcing rib and the flexible unfolding elastic sheet are integrally pressed and molded.

Preferably, one end of the flexible unfolding elastic sheet is welded on the outer wall of the flexible corrugated pipe.

Preferably, the developing device also comprises a developing ring which is arranged on the circumference of the bottom surface of the net basket; a far-end marking ring sleeved on the far-end guide wire and a near-end marking ring sleeved on the near-end guide wire.

Preferably, the distal end of the distal spring is further provided with a ball cap.

Compared with the prior art, the remote protective umbrella system provided by the invention has the following advantages:

the invention provides a far-end umbrella protection system, which comprises a conveying sheath tube and a blood vessel far-end protector arranged in the conveying sheath tube; the blood vessel far-end protector comprises a far-end spring, a far-end guide wire, a flexible corrugated pipe and a near-end guide wire which are sequentially connected, wherein anti-unwinding wires distributed along the length direction of the flexible corrugated pipe are arranged in the flexible corrugated pipe, the anti-unwinding wires are fixed in the flexible corrugated pipe, the hardness of the far-end guide wire is smaller than that of the near-end guide wire, a plurality of annular flexible unfolding elastic sheets are distributed on the outer wall of the flexible corrugated pipe at intervals along the length direction, and one ends of the flexible unfolding elastic sheets are connected with the outer wall of the flexible corrugated pipe; the flexible corrugated pipe is sleeved with a conical basket with an opening at the bottom, the conical end of the basket is connected with a far-end guide wire, any point on the circumference of the opening end of the basket is connected with a near-end guide wire, the maximum outer diameter of each flexible expansion elastic sheet when being expanded is smaller than the inner diameter of the basket at the corresponding position when being expanded, the design can solve the problem that if too much thrombus or too large volume exists in the prior art, the thrombus is gathered at the narrow part of the woven basket, the deformation of the basket is easy to cause, the intercepting effect of the basket is influenced, too much massive thrombus is accumulated at the narrow part of the basket, the recovery of the basket is influenced, the flexible expansion elastic sheet can separate or cut the collected massive thrombus, the massive thrombus is prevented from being accumulated at the narrow part of the basket, the time of the basket in a blood vessel can be prolonged, the blockage of the thrombus cannot be caused, the anti-rotation wire can increase the rigidity of the flexible corrugated pipe, the support for the expansion of the flexible elastic sheet is ensured, and meanwhile, the flexible corrugated pipe is hollow, certain flexibility is provided, and the convenience is brought for the far-end protector to pass through sharp bends in the blood vessel.

Drawings

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

FIG. 1 is a schematic structural view of a distal umbrella system of the present invention (front view, without a delivery sheath shown);

FIG. 2 is a schematic structural view of the distal umbrella system of the present invention (front view, without the sheath and basket shown);

fig. 3 is a schematic structural view of the flexible bellows according to the present invention.

Description of reference numerals:

1. a distal spring; 2. a distal guidewire; 3. a flexible bellows; 4. a proximal guidewire; 5. flexibly unfolding the elastic sheet; 6. a basket; 7. reinforcing ribs; 8. a developing ring; 9. a distal marker ring; 10. a proximal marker ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, 2 and 3, the present embodiment provides a distal protection umbrella system, which includes a delivery sheath, a blood vessel distal protector disposed in the delivery sheath; the blood vessel far-end protector comprises a far-end spring 1, a far-end guide wire 2, a flexible corrugated pipe 3 and a near-end guide wire 4 which are sequentially connected, anti-untwisting wires distributed along the length direction of the flexible corrugated pipe 3 are arranged in the flexible corrugated pipe 3, the anti-untwisting wires are fixed in the flexible corrugated pipe 3, the hardness of the far-end guide wire 2 is smaller than that of the near-end guide wire 4, a plurality of annular flexible unfolding elastic sheets 5 are distributed on the outer wall of the flexible corrugated pipe 3 at intervals along the length direction, and one end of each flexible unfolding elastic sheet 5 is connected with the outer wall of the flexible corrugated pipe 3; the flexible corrugated pipe 3 is sleeved with a conical basket 6 with an opening at the bottom, the conical end of the basket 6 is connected with the far-end guide wire 2, any point on the circumference of the opening end of the basket 6 is connected with the near-end guide wire 4, and the maximum outer diameter of each flexible unfolding elastic sheet 5 when unfolded is smaller than the inner diameter of the basket 6 at the corresponding position when unfolded.

The invention provides a far-end umbrella protection system, which comprises a conveying sheath tube and a blood vessel far-end protector arranged in the conveying sheath tube; the blood vessel far-end protector comprises a far-end spring 1, a far-end guide wire 2, a flexible corrugated pipe 3 and a near-end guide wire 4 which are sequentially connected, anti-untwisting wires distributed along the length direction of the flexible corrugated pipe 3 are arranged in the flexible corrugated pipe 3, the anti-untwisting wires are fixed in the flexible corrugated pipe 3, the hardness of the far-end guide wire 2 is smaller than that of the near-end guide wire 4, a plurality of annular flexible unfolding elastic sheets 5 are distributed on the outer wall of the flexible corrugated pipe 3 at intervals along the length direction, and one end of each flexible unfolding elastic sheet 5 is connected with the outer wall of the flexible corrugated pipe 3; the flexible corrugated pipe 3 is externally sleeved with a conical basket 6 with an opening at the bottom, the conical end of the basket 6 is connected with the far-end guide wire 2, any point on the circumference of the opening end of the basket 6 is connected with the near-end guide wire 4, the maximum outer diameter of each flexible expansion elastic sheet 5 when expanded is smaller than the inner diameter of the basket 6 at the corresponding position when expanded, the problem that if too much thrombus or too large volume exists in the prior art can be solved, the thrombus is gathered at the narrow part of the woven basket, the deformation of the basket is easy to cause, the intercepting effect of the basket is influenced, too much massive thrombus is accumulated at the narrow part of the basket, the recovery of the basket can be influenced, the flexible expansion elastic sheet 5 can separate the collected massive thrombus or has the cutting effect, the massive thrombus is prevented from being accumulated at the narrow part of the basket, the time of the basket in a blood vessel can be prolonged, the blockage of the thrombus cannot be caused, the rigidity of the anti-spinning wire can be increased, the deformation of the flexible corrugated pipe 3 is prevented from being deformed, the support of the flexible expansion elastic sheet 5 is ensured, meanwhile, a certain flexibility is realized, and the device can conveniently pass through a sharp bend at the far end of the blood vessel.

The conveying sheath and the anti-unwinding wire of the invention are both in the prior art, are not marked in the figure, and the conveying sheath can be a sheath of Shenzhen medical technology Limited, which is not described herein again.

Specifically, when the basket 6 is unfolded, the flexible unfolding elastic pieces 5 are also in an unfolding state, thrombus can sequentially pass through the plurality of flexible unfolding elastic pieces 5 after entering the basket, the thrombus with larger volume can be hung or cut into small pieces by the flexible unfolding elastic pieces 5, the small pieces of thrombus cannot be completely accumulated at the conical part of the basket, the collected thrombus can be dispersed, the clogging of the thrombus cannot be caused, the time in the blood vessel of the blood vessel distal end protector can be prolonged, more time is provided for surgical operation, when the blood vessel distal end protector needs to be taken out, the near-end guide wire 4 drives the basket 6 to be collected into a conveying sheath tube, and the flexible unfolding elastic pieces 5 can also be pressed on the outer wall of the flexible corrugated tube 3 along with the tightening of the basket, so that the recovery is convenient; the anti-unwinding wire can connect the far-end guide wire 2 and the near-end guide wire 4 into a whole, the hardness of the far-end guide wire 2 is smaller than that of the near-end guide wire 4, the far-end guide wire 2 with better flexibility can be selected at the far end, the near-end guide wire 4 with certain hardness is required at the near end, and the operation is convenient.

The distal guide wire 2 is a conical wire, the distal end of the distal guide wire 2 is arranged in the distal spring 1 and fixedly connected with the distal spring 1, the proximal end of the distal guide wire 2 is connected with the anti-unwinding wire in a cementing or crimping mode, and the length of the distal guide wire 2 is 20-50cm.

The near-end guide wire 4 is conical, the diameter of one end of the near-end guide wire 4 close to the anti-unwinding wire is 0.10-0.20mm, and the diameter of the other end of the near-end guide wire 4 is 0.32-0.39cm; the near-end guide wire 4 is connected with the anti-unwinding wire in a laser spot welding mode, and a laser welding spot 13 is formed on the outer wall of the flexible corrugated pipe; the proximal guide wire 4 is coated with polytetrafluoroethylene, so that the gripping hand feeling of the proximal guide wire 4 is improved, and the length of the proximal guide wire 4 is 180-320cm.

The outer wall of the flexible corrugated pipe 3 is provided with an observation operation port 12 communicated with the interior of the flexible corrugated pipe 3, the far end of the anti-unscrewing wire can be bonded with the flexible corrugated pipe 3 or fixed in a compression joint mode through the observation operation port 12, the observation operation port 12 can also observe the position of the anti-unscrewing wire in the pipe sleeve 3 through a microscope, and thermosetting adhesive can uniformly permeate into a cavity in the flexible corrugated pipe 3 through the observation operation port 12.

The distal guide wire 2 and the proximal guide wire 4 are not connected, and even if an operator carelessly touches one end of the proximal guide wire 4 outside the body in an operation, a force value is not directly transmitted to the guide wire 2 and the basket 6 and can be dispersed by the anti-unwinding wire, so that the basket 4 is prevented from being damaged due to friction or displacement relative to the inner wall of a blood vessel, and the safety of the operation is ensured.

The anti-unwinding yarn is made of single-strand or double-strand yarns; the diameter of the far end of the anti-unwinding wire is smaller than that of one end of the far-end guide wire 2 adjacent to the anti-unwinding wire, and the diameter of the near end of the anti-unwinding wire is smaller than that of one end of the near-end guide wire 4 adjacent to the anti-unwinding wire; the diameter of the anti-unwinding yarn is 0.02-0.08mm.

In some embodiments, the outer diameters of the flexible deployment springs 5 when deployed are equal, and the flexible deployment springs 5 may be made to have the same outer diameter when deployed.

In some embodiments, the outer diameter of each flexible unfolding spring 5 gradually increases from the distal end spring 1 to the proximal end guide wire 4 when being unfolded, and the design can be made according to the practical application.

In some embodiments, a plurality of reinforcing ribs 7 are arranged at intervals along the length of each flexible unfolding elastic sheet 5, and the reinforcing ribs 7 can improve the strength of the flexible unfolding elastic sheets 5.

The flexible unfolding elastic sheet 5 is made of nickel-titanium alloy.

The reinforcing ribs 7 and the flexible unfolding elastic sheets 5 are integrally pressed and formed, and the manufacturing is convenient.

One end of a flexible unfolding elastic sheet 5 is welded on the outer wall of the flexible corrugated pipe 3.

As shown in fig. 1, the present embodiment further includes a developing ring 8, and the developing ring 8 is annularly disposed on the circumference of the bottom surface of the basket; a far end marking ring 9 sleeved on the far end guide wire 2 and a near end marking ring 10 sleeved on the near end guide wire 4; the developing ring 8 is made of platinum-iridium alloy or gold-plated tungsten wire material and is arranged on the basket 6 in a mode of sealing the edge of the opening of the basket 6; the distal end marking ring 9 and the proximal end marking ring 10 are both hollow cylindrical sleeves and are made of developing materials, and the distal end marking ring 9 and the proximal end marking ring 10 can move on the distal guide wire 2 and the proximal guide wire 4 respectively, so that the basket 4 can conveniently enter the position of lesion.

As shown in fig. 1, in some embodiments, the distal end of the distal spring 1 is further provided with a ball cap 11, and the ball cap 11 is at the distal end of the distal spring 1, so as to avoid scratching blood vessels at the distal end of the distal spring 1.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote umbrella system, comprising: comprises a conveying sheath tube and a blood vessel far-end protector arranged in the conveying sheath tube;

the blood vessel far-end protector comprises a far-end spring (1), a far-end guide wire (2), a flexible corrugated pipe (3) and a near-end guide wire (4) which are sequentially connected, anti-untwisting wires which are distributed along the length direction of the flexible corrugated pipe (3) are arranged in the flexible corrugated pipe (3), the anti-untwisting wires are fixed in the flexible corrugated pipe (3), the hardness of the far-end guide wire (2) is smaller than that of the near-end guide wire (4), a plurality of annular flexible unfolding elastic sheets (5) are distributed on the outer wall of the flexible corrugated pipe (3) at intervals along the length direction, and one end of each flexible unfolding elastic sheet (5) is connected with the outer wall of the flexible corrugated pipe (3); the flexible corrugated pipe (3) is sleeved with a conical basket (6) with an opening at the bottom, the conical end of the basket (6) is connected with the far-end guide wire (2), any point on the circumference of the opening end of the basket (6) is connected with the near-end guide wire (4), and the maximum outer diameter of each flexible unfolding elastic sheet (5) when unfolded is smaller than the inner diameter of the basket (6) at the corresponding position when unfolded.

2. The distal umbrella system of claim 1, wherein: the anti-unwinding wire is made of single-stranded or double-stranded wire; the diameter of the far end of the anti-unwinding wire is smaller than that of one end of the far-end guide wire (2) adjacent to the anti-unwinding wire, and the diameter of the near end of the anti-unwinding wire is smaller than that of one end of the near-end guide wire (4) adjacent to the anti-unwinding wire; the diameter of the anti-unwinding yarn is 0.02-0.08mm.

3. The distal umbrella system according to claim 1 or 2, wherein: the outer diameters of the flexible unfolding elastic sheets (5) are equal when the flexible unfolding elastic sheets are unfolded.

4. The distal umbrella system according to claim 1 or 2, wherein: the outer diameter of each flexible unfolding elastic sheet (5) when unfolded increases gradually from the far-end spring (1) to the near-end guide wire (4).

5. The distal umbrella system of claim 1, wherein: a plurality of reinforcing ribs (7) are distributed at intervals along the length of each flexible unfolding elastic sheet (5).

6. The distal umbrella system of claim 1, wherein: the flexible unfolding elastic sheet (5) is made of nickel-titanium alloy.

7. The distal umbrella system of claim 6, wherein: the reinforcing ribs (7) and the flexible unfolding elastic sheet (5) are integrally pressed and formed.

8. The distal umbrella system of claim 1, wherein: one end of the flexible unfolding elastic sheet (5) is welded on the outer wall of the flexible corrugated pipe (3).

9. The distal umbrella system of claim 1, wherein: the developing device also comprises a developing ring (8), wherein the developing ring (8) is annularly arranged on the circumference of the bottom surface of the net basket; a far-end marking ring (9) sleeved on the far-end guide wire (2) and a near-end marking ring (10) sleeved on the near-end guide wire (4).

10. The distal umbrella system of claim 1, wherein: the far end of the far-end spring (1) is also provided with a ball cap.