JP3660931B2 - Thrombus embolus capture device - Google Patents

Description

  The present invention perfuses severe organs such as brain, heart, lung, liver, kidney, and extremities in the treatment of vascular diseases such as placement of stents or stent grafts, percutaneous angioplasty, or surgery. The present invention relates to a thrombus embolus capturing device that prevents an artery or vein from being blocked by a floating thrombus or embolus.

  With the aging of society, arterial occlusions and aneurysms that occur due to arteriosclerosis have increased remarkably. Conventionally, treatment of arterial occlusion and aneurysm has been performed mainly in surgery, but recently, endovascular treatment using a less invasive catheter has attracted attention, and stent or stent graft placement, New technologies are being rapidly developed in the treatment of vascular diseases such as percutaneous angioplasty. However, in surgical revascularization and endovascular treatment, depending on the surgical technique and catheter operation, a blood clot often forms in the blood vessel lumen, and atheroma (atheroma) may be peeled off from the blood vessel wall. These thrombi and atherothromboembolism occlude arteries or veins that perfuse critical organs such as the brain, heart, liver, kidneys, and extremities. there were. Similarly, in normal surgical operations, blood clots may form in the lumen of the blood vessel, or atheroma may be detached from the blood vessel wall. There was a problem of causing thromboembolism. In particular, during endovascular treatment using a catheter technique, floating thrombi and atheroemboli cannot be observed or removed directly, so floating thrombi or emboli due to atherosclerosis are serious complications such as myocardial infarction. There was a problem of causing illness.

In order to solve these problems, a technique relating to a blood vessel filter system (hereinafter referred to as “conventional technique 1”) (Patent Document 1) and a technique relating to a device for filtering blood in blood vessels (hereinafter referred to as “conventional technique 2”). (Patent Document 2) and a technique related to an intravascular filter (hereinafter referred to as “Prior Art 3”) (Patent Document 3) have been proposed.
Japanese Patent Laid-Open No. 2003-220062 JP 2001-293084 A Japanese Patent Laid-Open No. 5-76535

  However, since all of the prior arts 1 to 3 contact the inner wall of the blood vessel released from the tubular catheter into the blood vessel, skill is required for positioning the filter in the blood vessel, and thrombus, When collecting a filter that captured suspended matter such as an embolus into the catheter, there was a problem that the filter or the stent could not be sufficiently contracted and could not be stored in the catheter, or the inner wall of the blood vessel was damaged. .

  The present invention aims to solve this problem.

  That is, according to the present invention, discharge and collection from the catheter can be performed smoothly, and the position where the bag-like filter is placed in the blood vessel can be easily positioned, and the bag-like filter is placed at the inner wall of the blood vessel. It can be safely and reliably placed without damaging it, and the bag-like filter that captures suspended matter such as thrombus and embolus in the blood vessel can be safely and reliably recovered outside the body without damaging the inner wall of the blood vessel. An object of the present invention is to provide a thrombus embolus capturing device that can be manufactured at low cost.

The invention described in claim 1 is a main body portion that is expanded to a cylindrical shape in a normal state where the diameter can be reduced and expanded, and is expanded in a normal state in which the diameter is expandable and is provided following the main body portion. A taper-shaped tail, and a stent composed of struts provided following the tail, and a bag-like filter composed of an opening and a body held in the main body of the stent; A thromboembolus capture device comprising:
(A) The main body and the tail of the stent are formed into a braid structure by being spirally twisted by one or a plurality of filaments, and
(B) The bag-shaped filter is inserted into the main body of the stent, and the opening of the bag-shaped filter is engaged with the distal end of the main body of the stent by engaging means. It is a thromboembolus capture device.

  The invention described in claim 2 is the invention described in claim 1, wherein the filament is made of a shape memory material, and the main body of the stent is expanded in a normal state to have a cylindrical shape. The shape is memorized, and the tail of the stent is memorized so as to be tapered in a normal state.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the strut portion is formed by twisting one or a plurality of filaments in a spiral manner so as to be integrated with the main body portion and the tail portion. is a form the reduced diameter capable of braid structure, and is characterized in that there is a rod-like body is in the normal state to the reduced径状.

  The invention described in claim 4 is the invention described in claim 3, wherein the filament is made of a shape memory material.

  According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the support portion is a hollow formed of a synthetic resin such as polytetrafluoroethylene, polyolefin, polyester, polyurethane, or polysiloxane. It is a rod-shaped body.

  The invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein at the distal end of the stent, the line is folded back, the two line ends are joined, and the line is folded back. It is characterized in that loops formed by twisting of the wire are formed at equal intervals.

  The invention described in claim 7 is the invention described in any one of claims 1 to 6, wherein the bag-like filter has a knitted fabric, a woven fabric, and a non-woven fabric having a large number of fine holes having a diameter of 10 to 300 μm. It is composed of a net or a perforated polymer film.

  The invention described in claim 8 is the invention described in claim 7, wherein the bag-like filter is a knitted fabric knitted into a bag shape with yarn, and a woven fabric woven into a bag shape with yarn. , Characterized in that it is composed of a non-woven fabric formed in a bag shape with a fiber web, a net, or a polymer film that is directly formed into a bag shape from a synthetic resin and then perforated. .

The invention described in claim 9 is the invention described in claim 7, wherein the bag-like filter is a knitted fabric, a woven fabric, a non-woven fabric, a net body, or a bag formed by bonding or sewing. It is composed of a perforated polymer film.

  The invention described in claim 10 is the invention described in any one of claims 7 to 9, wherein the knitted fabric and the woven fabric are made of a polyester yarn, a polyamide yarn, a polypropylene yarn, or an ultrafine metal wire. It is characterized by that.

  The invention described in claim 11 is the invention described in any one of claims 7 to 9, wherein the nonwoven fabric and the network are composed of polyester fiber, polyamide fiber, polypropylene fiber, cellulose fiber or a mixed fiber thereof. It is characterized by being.

  The invention described in claim 12 is the invention described in any one of claims 7 to 9, wherein the polymer film is made of a fluororesin, a polyurethane resin, a polyester resin, a polyamide resin or a polypropylene resin. It is characterized by this.

  The invention described in claim 13 is the invention described in any one of claims 1 to 12, wherein the engaging means is (a) sewing with a suture, (b) adhesion with an adhesive, or (C) It is characterized by welding.

  The present invention has the following effects.

  (1) According to the invention described in claims 1, 3 to 5, (a) the main body and the tail of the stent are spirally twisted by one or a plurality of filaments to form a braid structure And (b) the bag-shaped filter is inserted into the main body of the stent, and the opening of the bag-shaped filter is engaged with the distal end of the main body of the stent by the engaging means. Therefore, it is possible to smoothly release and collect from the catheter, and easily locate the place where the bag-like filter is placed in the blood vessel, and damage the inner wall of the blood vessel at the place. It is possible to safely and reliably indwell it, and to collect the bag-like filter that captures suspended matter such as thrombus and embolus in the blood vessel safely and reliably outside the blood vessel without damaging the inner wall of the blood vessel. Thrombus embolus capture device It can be provided at low cost.

  (2) According to the invention described in claim 2, the filament is made of a shape memory material, the shape of the main body of the stent is expanded so as to become a cylindrical shape in a normal state, and the stent Since the shape of the tail portion is memorized so as to be tapered in the normal state, it is possible to easily and inexpensively manufacture a stent having a main body portion having a diameter increased in the normal state and a tail portion that is tapered in the normal state.

  (3) According to the invention described in claim 6, loops are formed at equal intervals on the distal end of the stent by folding the filaments, joining the two filament ends, twisting the folded portions of the filaments, etc. Therefore, the opening of the bag-like filter inserted in the main body of the stent can be easily engaged with the distal end of the stent by the engaging means, and the distal end of the stent is smooth when formed with a loop. Therefore, the inner wall of the tubular body is not damaged.

  (4) According to the invention described in claims 7 to 12, a knitted fabric, a woven fabric, a non-woven fabric, a net or a perforated polymer in which a bag-like filter has a large number of fine pores having a diameter of 10 to 300 μm. Since it is composed of a film, the bag-like filter can reliably capture suspended matters such as thrombus and embolus in the blood vessel without stopping the flow of blood.

  (5) According to the invention described in claim 13, since the engaging means is (a) sewing with a suture, (b) adhesion with an adhesive, or (c) welding, the engaging means Does not damage the inner wall of the blood vessel.

  Hereinafter, the present embodiment will be described with reference to the drawings.

  FIG. 1 is an explanatory view of a thromboembolism capture device showing an embodiment of the present invention, in which (a) shows a stent, (b) shows a bag-like (conical shape) filter, (c) shows the AA cross section of the filter of (b), and (d) shows that the bag-shaped filter is inserted into the main body of the expanded diameter stent, The opening is shown in a state in which the opening is engaged with the distal end of the main body of the stent by the engaging means, and (e) is inserted into the stent and the main body and the bag-like filter is stored in the catheter. Shows the state. FIG. 2 is an explanatory view of a thromboembolism capture device showing another embodiment of the present invention, in which (a) shows a stent and (b) shows a bag shape (vertical section U-shaped). (C) shows the filter, wherein the bag-shaped filter is inserted into the main body portion of the expanded stent, and the opening of the bag-shaped filter is engaged with the distal end of the main body portion of the stent by the engaging means. The engaged state is shown, and (d) shows the state in which the bag-like filter is inserted into the stent and its main body and stored in the catheter. FIG. 3 is an explanatory view of a stent in a thromboembolism capture device showing another embodiment of the present invention. FIG. 4 shows the main body part of the stent stored in the catheter and the bag-like filter inserted therein, which is discharged into the blood vessel branched from the arch aorta, and the blood is filtered by the bag-like filter. It is explanatory drawing which shows a state, Comprising: (a) is a whole explanatory drawing, (b) is the elements on larger scale.

  In FIG. 1, 10 is a thromboembolism capture device. The thromboembolism capture device 10 has a main body 1a that is expanded and cylindrical in a normal state in which the diameter can be freely expanded, and is tapered in a normal state in which the diameter can be expanded and contracted, provided subsequently to the main body 1a. A stent 1 composed of a tail portion 1b and a strut portion 1c provided following the tail portion 1b, and an opening 2a and a body portion 2b held in the body portion 1a of the stent 1 A bag-like filter 2 and a bag-like (conical shape) filter 2 composed of an opening 2a and a main body 2b, and (a) a main body 1a of the stent 1. And the tail portion 1b are formed in a braided structure by being spirally twisted by one or a plurality of filaments W, and (b) the bag-like filter 2 is inserted into the main body portion 1a of the stent 1. In addition, the opening 2a of the bag-like filter 2 is It is engaged by the engaging means 5 to the tip 1d of the main body portion 1a of cement 1. In FIG. 1, 2c is a hole through which a guide wire passes, 4 is a catheter, and 6 is a guide wire.

  In FIG. 2, 20 is a thromboembolism capture device. The thromboembolism capturing device 20 has a main body portion 1a that is expanded and cylindrical in a normal state where the diameter can be reduced and expanded, and is expanded and tapered in a normal state that is provided following the main body portion 1a. A stent 1 composed of a tail portion 1b and a strut portion 1c provided following the tail portion 1b, and an opening 3a and a body portion 3b held in the body portion 1a of the stent 1 A bag-like (longitudinal U-shaped) filter 3 and a bag-like filter 3 composed of an opening 2a and a main body 2b, and (a) the stent 1 The main body portion 1a and the tail portion 1b are spirally twisted by one or a plurality of filaments W to form a braided structure, and (b) the bag-like filter 3 is the main body portion 1a of the stent 1. And the opening 3 of the bag-like filter 3. There has been engaged by the engaging means 5 to the tip 1d of the main body portion 1a of the stent 1. In FIG. 2, 4 is a catheter and 6 is a guide wire.

  1 and 2 show the bag-shaped filter 2 having a conical shape and the bag-shaped filter 3 having a U-shaped longitudinal section, but the bag-shaped filter of the present invention is not deviated from the object of the present invention. May have a bag shape other than these shapes.

  The present invention has a main body portion 1a which is expanded and cylindrical in a normal state where the diameter can be reduced and expanded, and a diameter is increased and tapered in a normal state which is provided following the main body portion 1a. From the tail portion 1b and the stent 1 composed of the strut portion 1c provided following the tail portion 1b, and the openings 2a and 3a and the main body portions 2b and 3b held in the main body portion 1a of the stent 1 A thrombus embolus capturing device 10 or 20 having a bag-like filter 2 or 3, and (a) the main body 1 a and the tail 1 b of the stent 1 are formed by one or a plurality of filaments W. (B) the bag-like filters 2 and 3 are inserted into the main body 1a of the stent 1 and the openings of the bag-like filters 2 and 3 are formed. The portions 2a and 3a are attached to the tip 1d of the main body 1a of the stent Since it is engaged by the coupling means 5, the discharge and recovery from the catheter 4 can be performed smoothly, and the location where the bag-like filters 2 and 3 are placed in the blood vessel can be easily positioned. In addition, the bag-like filters 2 and 3 can be safely and surely placed without damaging the inner wall of the blood vessel, and the bag-like filter that captures floating substances such as thrombus and embolus in the blood vessel A thrombus embolus capture device that can be safely and reliably recovered outside the body without damaging the inner wall can be provided at a low cost.

  The filament W constituting the stent 1 in the present invention is preferably formed of a shape memory alloy, that is, a shape memory alloy such as Ni—Ti, Cu—Al—Ni, or Cu—Zn—Al. Unless it is contrary to the above-mentioned purpose, it can be formed of metals such as stainless steel, nickel and tantalum, and synthetic resins such as polyester, polytetrafluoroethylene, polyolefin and polyurethane. Further, a metal wire formed of a shape memory alloy or other metal may be coated with the synthetic resin as described above.

  In the case where the filament W is made of a shape memory material, the main body 1a of the stent 1 is expanded in diameter in a normal state so as to have a cylindrical shape, and the tail 1b of the stent 1 is tapered in a normal state. The shape is memorized so that In this way, the filament W is made of a shape memory material, the main body portion 1a of the stent 1 is expanded in diameter in a normal state so as to have a cylindrical shape, and the tail portion 1b of the stent 1 is tapered in a normal state. When the shape is memorized so as to have a shape, a stent having the main body portion 1a having a diameter expanded in a normal state and a tail portion 1b having a tapered shape in a normal state can be easily manufactured at a low cost.

The strut portion 1c in the stent 1 preferably has a braided structure having a reduced diameter, in which one or a plurality of filaments W are spirally twisted and formed integrally with the main body portion and the tail portion. Although the diameter is sometimes reduced to a rod-like body, the filament W is preferably made of a shape memory material.

  As shown in FIG. 3, in the present invention, the support 11c in the stent 11 is a hollow rod-shaped body (pipe-shaped body) made of a synthetic resin such as polytetrafluoroethylene, polyolefin, polyester, polyurethane, polysiloxane or the like. It doesn't matter. In FIG. 3, 11a, 11b, and 11d are a main-body part, a tail part, and a front-end | tip, respectively.

  As shown in FIGS. 1 and 3, in the stents 1 and 11 of the present invention, the filaments are folded back at the distal ends 1d and 11d of the stent (the filament W of the distal end portion 1d of the stent 1 in FIG. 1A). (Refer to Folding.) Loops formed by joining two wire ends, twisting the folded portion of the wire, and the like are formed at equal intervals. The “loop by the folding of the filament” is formed while creating the braid structure by weaving the filament W so as to form the folding of the filament W at the end 1d of the stent 1. “Loop by joining two wire ends” is a braided structure formed by weaving the wire W, cut in the horizontal direction and welded, brazed, etc. at the ends of the two adjacent wires W, W Are formed by bonding. The “loop by twisting of the wire” is formed by twisting the turn of the wire W. The loop according to the present invention is not limited to the loop formed by the above-described means, and may be formed by other means as long as the object of the present invention is not violated.

  As described above, when the loops are formed at equal intervals on the distal ends 1d and 11d of the stents 1 and 11 by folding the filaments, joining the two filament ends, twisting the folded portions of the filaments, and the like. The opening of the bag-shaped filter inserted in the main body of the stent can be easily engaged with the distal end of the stent by the engaging means, and the distal end of the stent is smooth when formed with a loop. Does not damage the inner wall of the blood vessel.

The bag-like filters 2 and 3 in the present invention are composed of a knitted fabric, a woven fabric, a nonwoven fabric, a net, or a perforated polymer film having a large number of fine holes having a diameter of 10 to 300 μm. The bag-like filters 2 and 3 are preferably a knitted fabric knitted into a bag shape with yarn, a woven fabric woven into a bag shape with yarn, a nonwoven fabric formed into a bag shape with a fiber web, and a net Alternatively, a knitted fabric, a woven fabric, which is formed of a polymer film which is directly formed from a synthetic resin into a bag shape and then perforated, but which is formed into a bag shape by adhesion or sewing, It may be composed of a nonwoven fabric, a net, or a perforated polymer film. Preferably, the polymer film is perforated by laser processing. However, as long as the object of the present invention is not violated, known perforation processing other than laser processing may be performed.

  Thus, when the bag-shaped filter is composed of a knitted fabric, a woven fabric, a nonwoven fabric, a net, or a perforated polymer film having a large number of fine holes having a diameter of 10 to 300 μm, the bag-shaped filter is Without stopping the blood flow, it is possible to reliably capture suspended matters such as thrombus and embolus in the blood vessel.

  The knitted fabric and the woven fabric are preferably made of polyester yarn, polyamide yarn, polypropylene yarn or ultrafine metal wire, and the nonwoven fabric and network are preferably polyester fiber, polyamide fiber, polypropylene. The polymer film is composed of fibers, cellulose fibers or mixed fibers thereof, and the polymer film is preferably composed of a fluororesin, a polyurethane resin, a polyester resin, a polyamide resin or a polypropylene resin.

  In the present invention, the openings 2a and 3a of the bag-like filters 2 and 3 inserted in the main body 1a of the stent 1 are engaged with the distal end 1d of the stent 1 by the engaging means 5, and the engaging means 5 Is preferably (a) sewing with a suture, (b) adhesion with an adhesive, or (c) welding. As described above, when the engaging means 5 is (a) sewing with a suture thread, (b) adhesion with an adhesive, or (c) welding, the engaging means 5 does not damage the inner wall of the blood vessel. Absent. The engagement means 5 in the present invention is an engagement means other than (a) sewing with a suture, (b) adhesion with an adhesive, and (c) welding, as long as it is not contrary to the object of the present invention. It may be something like a snap.

  The thrombus embolus capturing devices 10 and 20 of the present invention may be stored in the pipe-shaped catheter 4 in advance. If the thromboembolism capture devices 10 and 20 are stored in a sterilized state in the pipe-shaped catheter 4 in advance, they can be used immediately in an emergency. Of course, the thromboembolism capture devices 10 and 20 may be stored in the catheter 4 immediately before use.

  Next, the operation of the thromboembolism capture device of the present invention will be described.

(1) A bag-like filter obtained by knitting polyester yarn, polyamide yarn, polypropylene yarn, or ultrafine metal wire into a bag shape inside the main body 1a of the stent 1 formed in a braid structure capable of self-expansion. 2 is inserted, and the opening 2a and the rear end 2c of the bag-like filter 2 are secured to the rear end of the distal end 1d and the tail 1b of the stent 1 with a suture to form the thromboembolus capture device 10. [FIG. 1 (d)]
(2) The bag-like (conical) filter 2 inserted in the main body 1a of the stent 1 in the thrombus embolus capturing device 10 is stored in the thin catheter 4 while being folded together with the main body of the stent. [FIG. 1 (e)]
(3) A thromboembolism capture device 10 having a filter 2 inserted in the main body 1a of the stent 1 housed in the catheter 4 is placed in the blood vessel along the guide wire 6 previously disposed in the blood vessel. Then, by pulling the catheter 4 while fixing the column portion 1c, the filter 2 pushed out into the blood vessel and inserted in the main body portion 1a of the stent 1 is expanded. [Fig. 4]
(4) While performing cardiovascular surgical treatment for heart disease and arteriovenous disease, transcatheter endovascular treatment, etc., leave the blood filter expanded, and after the treatment is finished, stent The thromboembolus capture device 10 including the main body 1a of the stent 1 and the bag-like filter 2 inserted inside the stent 1 is contracted by pushing back the catheter 4 while holding the strut 1c continuous with the tail 1b. Re-store in the catheter 4. [FIG. 1 (e)]
(5) Pull the thromboembolism capture device 10 re-stored in the catheter 4 along the guide wire and remove it from the body.

  As described above, when the thromboembolism capturing device 10 including the main body 1a of the stent 1 and the bag-like filter 2 inserted inside the stent 1 is retracted into the catheter 4 while being contracted, the bag-like filter 2 is Since it is sutured and fixed to the opening of the stent 1, when the catheter 4 is pushed back and retracted as the taper of the tail 1 b converges, the bag-like filter 2 is retracted. Floats such as thrombi and emboli captured by the are collected in the catheter together with the bag-like filter 2. According to the present invention, the bag-like filter 2 can be expanded while being inserted into the main body 1a of the stent 1 to capture floating substances such as thrombi and emboli. The filter 2 can be safely and reliably recovered outside the body without damaging the inner wall of the blood vessel.

It is explanatory drawing of the thromboembolism capture device which shows one embodiment of this invention, (a) shows a stent, (b) shows a bag-like (conical shape) filter, (c), It is AA sectional drawing of the filter of (b), (d) is that the bag-shaped filter is inserted in the main-body part of the stent of a diameter-expanded state, and the opening part of the bag-shaped filter is FIG. 2 shows a state in which the distal end of the main body portion of the stent is engaged by engagement means, and FIG. 4E shows a state in which the stent and the bag-like filter are inserted in the main body portion and stored in the catheter. Show. It is explanatory drawing of the thromboembolism capture device which shows other one Embodiment of this invention, (a) shows a stent, (b) shows a bag-like (vertical-section U-shaped) filter, (C) The bag-shaped filter is inserted into the main body portion of the expanded stent, and the opening of the bag-shaped filter is engaged with the distal end of the main body portion of the stent by the engaging means. (D) shows a state in which a bag-like filter inserted in the stent and its main body is stored in the catheter. It is explanatory drawing of the stent in the thromboembolism capture device which shows other one Embodiment of this invention. Description of a state in which a main body of a stent stored in a catheter and a bag-like filter inserted therein are discharged into a blood vessel branched from the arch aorta and blood is filtered by the bag-like filter It is a figure, (a) is a whole explanatory drawing, and (b) is the elements on larger scale.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stent 1a Main body part 1b Tail part 1c Support | pillar part 1d Tip 2, 3 Bag-like filter 2a, 3a Opening part 2b, 3b Main body part 2c Guide wire through hole 4 Catheter 5 Engaging means 6 Guide wire 10, 20 Thrombus embolus capture device W Filament

Claims (13)

Main body part that expands in diameter and becomes cylindrical in a normal state that can be expanded and contracted, a tail part that expands in a normal state that can be expanded and contracted in a normal state that can be expanded and contracted, and a tail part, and the tail part A thromboembolus capture device comprising: a stent composed of struts provided subsequently to the body; and a bag-like filter composed of an opening and a body part, which is held in the body part of the stent. ,
(A) The main body and the tail of the stent are formed into a braid structure by being spirally twisted by one or a plurality of filaments, and
(B) The bag-shaped filter is inserted into the main body of the stent, and the opening of the bag-shaped filter is engaged with the distal end of the main body of the stent by engaging means. Thromboembolus capture device.   The filament is made of a shape memory material, the shape of the main body of the stent is expanded so as to become a cylindrical shape in a normal state, and the shape of the tail of the stent is changed to a tapered shape in a normal state. The thrombus embolus capture device according to claim 1, wherein The strut is set to one or the body portion and the tail portion of the plurality of filament teamed twisted spirally and integrally formed with a reduced diameter capable of braid structure, and is the normal state to the reduced径状 rod-like The thrombus embolus capturing device according to claim 1 or 2, wherein the device is a body.   The thrombus embolus capture device according to claim 3, wherein the filament is made of a shape memory material.   The thrombus embolus capture device according to claim 1 or 2, wherein the support portion is a hollow rod-shaped body made of a synthetic resin such as polytetrafluoroethylene, polyolefin, polyester, polyurethane, or polysiloxane.   6. The loop according to any one of claims 1 to 5, wherein loops are formed at equal intervals on the distal end of the stent by folding the filaments, joining the two filament ends, twisting the folded portions of the filaments, and the like. The thromboembolism capture device described.   The said bag-shaped filter is comprised with the knitted fabric which has many fine holes with a diameter of 10-300 micrometers, a woven fabric, a nonwoven fabric, a net | network body, or the perforated polymer film, It is characterized by the above-mentioned. The thromboembolism capture device according to any one of 6.   The bag-shaped filter is formed of a knitted fabric knitted into a bag shape with yarn, a woven fabric woven into a bag shape with yarn, a non-woven fabric formed into a bag shape with a fiber web, a net, or a synthetic resin. 8. The thromboembolism capture device according to claim 7, wherein the thromboembolus capture device is formed of a polymer film which is directly formed into a bag shape and then perforated. 8. The bag-like filter is composed of a knitted fabric, a woven fabric, a non-woven fabric, a net or a perforated polymer film formed into a bag shape by adhesion or sewing. The thromboembolism capture device according to 1.   The thromboembolism capturing device according to any one of claims 7 to 9, wherein the knitted fabric and the woven fabric are made of polyester yarn, polyamide yarn, polypropylene yarn, or ultrafine metal wire.   The thromboembolism capturing device according to any one of claims 7 to 9, wherein the nonwoven fabric and the net are made of polyester fiber, polyamide fiber, polypropylene fiber, cellulose fiber, or a mixed fiber thereof.   The thrombus embolus capturing device according to any one of claims 7 to 9, wherein the polymer film is made of a fluororesin, a polyurethane resin, a polyester resin, a polyamide resin, or a polypropylene resin.   The thromboembolus capture according to any one of claims 1 to 12, wherein the engaging means is (a) sewing with a suture, (b) adhesion with an adhesive, or (c) welding. apparatus.

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