CN116492107B - Easily-transported vascular filter for pulmonary embolism - Google Patents
Easily-transported vascular filter for pulmonary embolism Download PDFInfo
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- CN116492107B CN116492107B CN202310753594.2A CN202310753594A CN116492107B CN 116492107 B CN116492107 B CN 116492107B CN 202310753594 A CN202310753594 A CN 202310753594A CN 116492107 B CN116492107 B CN 116492107B
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- outer cover
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- filter
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- 230000002792 vascular Effects 0.000 title claims abstract description 31
- 208000010378 Pulmonary Embolism Diseases 0.000 title claims abstract description 29
- 238000004873 anchoring Methods 0.000 claims abstract description 81
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000741 silica gel Substances 0.000 claims abstract description 37
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 37
- 239000002775 capsule Substances 0.000 claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000006748 scratching Methods 0.000 claims description 3
- 230000002393 scratching effect Effects 0.000 claims description 3
- 210000004204 blood vessel Anatomy 0.000 abstract description 29
- 208000007536 Thrombosis Diseases 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 10
- 239000008280 blood Substances 0.000 abstract description 9
- 210000004369 blood Anatomy 0.000 abstract description 9
- 230000036772 blood pressure Effects 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000002513 implantation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 210000001147 pulmonary artery Anatomy 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 208000005189 Embolism Diseases 0.000 description 1
- 208000000616 Hemoptysis Diseases 0.000 description 1
- 206010042434 Sudden death Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000002583 angiography Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000001991 pathophysiological effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 208000013220 shortness of breath Diseases 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/0103—With centering means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The application discloses an easy-to-convey vascular filter for pulmonary embolism, and relates to the technical field of vascular filters, wherein the easy-to-convey vascular filter comprises a hook connecting part, an outer cover, a pressure spring, a limiting block, a filtering arm, an anchoring arm and a tube sheath; the limiting block is positioned in the outer cover; the pressure spring is positioned in the outer cover and is fixed between the outer cover and the limiting block; the anchoring arm is fixed with a silicon capsule, and the silicon capsule is sleeved on the anchoring arm; the anchoring arm is sleeved with a tube sheath, and the inner wall of the tube sheath is in sliding connection with the outer wall of the anchoring arm; one end of the tube sheath, which is far away from the outer cover, is fixedly connected with one end of the silica gel bag, which is close to the outer cover; a traction wire is fixed on the tube sheath, and one end of the traction wire, which is far away from the tube sheath, is fixed on the limiting block; can realize that when the blood pressure of the blood vessel of implantation filter is too big or the thrombus is great in the blood vessel, when the couple connecting portion slides for the enclosing cover under the promotion of blood or thrombus, the condition that the anchoring arm contracts to the intraductal branch of cover can not appear, the filter can comparatively firm location at the endovascular technological effect.
Description
Technical Field
The application relates to the technical field of vascular filters, in particular to an easy-to-convey vascular filter for pulmonary embolism.
Background
Pulmonary embolism refers to a series of pathophysiological and hemodynamic changes resulting from an endogenous or exogenous embolic event that enters the pulmonary artery through blood circulation, occluding its branches. The human body has 5 lung lobes and has very strong compensation function, and when the pulmonary artery is blocked by 20% instantaneously, the patient can have no clinical symptoms, and at the moment, the patient can be determined only by an auxiliary imaging examination party such as angiography and the like. When the pulmonary artery is blocked by 50% instantaneously, the patient can have obvious clinical manifestations such as hemoptysis, shortness of breath, chest pain and the like. When the pulmonary artery is instantaneously blocked 80%, acute sudden death may occur in the patient. Meanwhile, the high risk period of the pulmonary embolism is the first month, so the filter is designed to filter larger thrombus and a large number of small thrombus, and the filter effect is ensured more than one month after implantation.
For example, chinese patent publication No. CN115607330B discloses a vena cava filter, the filter adopts a recovery connector to be slidingly connected to a sheath cover and a sheath, a plurality of sheaths are arranged at intervals and enclose a filtering area, the filter is respectively connected to the sheath cover through a plurality of sheaths, a plurality of anchor arms penetrate through a plurality of sheaths in one-to-one correspondence, and the anchor arms are connected to the recovery connector, when the vena cava filter needs to be taken out, the recovery connector can be operated to slide relative to the sheath cover, thereby pulling the anchor arms to shrink into the sheaths, the process of taking out the filter can not cause vascular scratch, and the filter is taken out more conveniently and safely.
However, when the blood pressure of the blood vessel in which the filter is implanted is too high or the thrombus in the blood vessel is large in the use process of the filter, the situation that the recovery connecting piece slides relative to the sheath cover under the pushing of the blood or the thrombus, so that the anchoring arm is pulled to shrink into the interior of the tube sheath, and the filter cannot be stably positioned in the blood vessel is caused.
Disclosure of Invention
The embodiment of the application solves the technical problem that the filter cannot be stably positioned in a blood vessel due to the fact that the recovery connecting piece slides relative to the sheath cover under the pushing of blood or thrombus to further pull the anchoring arm to shrink into the interior of the sheath when the blood pressure of the blood vessel of the implanted filter is overlarge or the thrombus in the blood vessel is large, and the technical effect that the anchoring arm is stably positioned in the blood vessel can be realized when the hook connecting part slides relative to the outer cover under the pushing of the blood or the thrombus when the blood pressure of the blood vessel of the implanted filter is overlarge or the thrombus in the blood vessel is large.
The embodiment of the application provides an easy-to-transport vascular filter for pulmonary embolism, which comprises a hook connecting part, an outer cover, a pressure spring, a limiting block, a filtering arm, an anchoring arm and a tube sheath;
the whole outer cover is a hollow cylinder with an opening at the bottom end, and the limiting block is positioned in the outer cover;
the pressure spring is positioned in the outer cover and is fixed between the outer cover and the limiting block;
a silicon capsule is fixed on the anchoring arm;
the shape of the silica gel bag is a torus when the silica gel bag is not subjected to external force, and the silica gel bag is sleeved on the anchoring arm;
the anchoring arm is sleeved with a tube sheath, and the inner wall of the tube sheath is in sliding connection with the outer wall of the anchoring arm;
the sheath is positioned between the silicon capsule and the outer cover;
one end of the tube sheath, which is far away from the outer cover, is fixedly connected with one end of the silica gel bag, which is close to the outer cover;
and a traction wire is fixed on the tube sheath, and one end of the traction wire, which is far away from the tube sheath, is fixed on the limiting block.
Further, the number of the filter arms is multiple, and the filter arms are uniformly fixed on the limiting block at the round edge of one end far away from the hook connecting part;
the number of the anchoring arms is multiple, and the anchoring arms are uniformly fixed on the round edge of one end of the outer cover, which is far away from the hook connecting part;
an anchoring hook is fixed at one end of the anchoring arm, which is far away from the hook connecting part, and the hook tip of the anchoring hook extends towards the direction far away from the central shaft of the outer cover.
Further, the hook connecting part comprises a hook and a connecting rod, and the hook is fixed on the connecting rod;
one end, far away from the hook, of the connecting rod is fixedly connected with a limiting block, and the whole limiting block is a circular block;
the hook is positioned above the outer cover, and the connecting rod penetrates through the outer cover and extends into the outer cover;
one end of the pressure spring, which is close to the hook, is fixed on the inner wall of one end of the outer cover, which is close to the hook, and one end of the pressure spring, which is far away from the hook, is fixed on the limiting block.
Further, a groove corresponding to the anchoring hook is formed in one end, far away from the hook connecting part, of the silica gel bag, and the anchoring hook is positioned in the groove, so that the anchoring hook is semi-enclosed by the silica gel bag;
one side of the groove, which is close to the hook connecting part, is provided with a scratch-proof plate for preventing the anchoring hook from scratching the silica gel bag.
Further, the diameter of the section circle of the limiting block is the same as that of the section circle of the inner space of the outer cover, and the limiting block is in sliding connection with the inner wall of the outer cover.
Further, the filter arm length is no greater than the anchor arm length;
the length value of the sheath is between one third and one half of the length value of the anchoring arm;
the height of the scratch-proof plate is not smaller than the length of the anchoring hook.
Further, the silicon capsule is made of medical silica gel, and the inside of the silica gel capsule is filled with gas;
the traction wire is woven by polyester fibers;
the scratch-resistant plate is made of polyurethane material;
the pressure spring is a memory alloy spring.
Further, the sheath includes a sliding shell and an arcuate strip;
the sliding shell is integrally tubular, and is sleeved on the filter arm;
one end of the arched strip, which is far away from the hook connecting part, is fixed at the middle position of the sliding shell, and the arched strip is positioned at one side of the sliding shell, which faces the central shaft of the outer cover.
Further, the whole arched strip is arc-shaped, and the arched strip protrudes towards the central axis of the outer cover;
one end of the arched strip, which is far away from the anchoring hook, is fixed on the outer cover;
the arch-shaped strip is made of memory alloy.
Further, one end of the traction wire, which is far away from the outer cover, is fixed at the middle position of the sliding shell.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
by providing an easy-to-transport vascular filter for pulmonary embolism comprising a silicon capsule, the silicon capsule is sleeved on the anchoring arm; the anchoring arm is sleeved with a tube sheath, and the inner wall of the tube sheath is in sliding connection with the outer wall of the anchoring arm; one end of the tube sheath, which is far away from the outer cover, is fixedly connected with one end of the silica gel bag, which is close to the outer cover; be fixed with the haulage line on the pipe sheath, the one end that the pipe sheath was kept away from to the haulage line is fixed on the stopper, effectively solved among the prior art when the blood vessel blood pressure of implantation filter is too big or the great time of endovascular thrombus, can appear retrieving the connecting piece and slide for the sheath lid under the promotion of blood or thrombus, and then pull the condition that the anchor arm contracts to the pipe sheath is inside, lead to the filter can not comparatively firm location at the endovascular technical problem, and then realized when the blood vessel blood pressure of implantation filter is too big or the endovascular thrombus is great, when the promotion of blood or thrombus lower couple connecting portion slides for the enclosing cover, the condition that the anchor arm contracts to the pipe sheath is inside can not appear, the filter can comparatively firm location at the endovascular technical effect.
Drawings
FIG. 1 is a schematic diagram of the filter structure of an easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 2 is a schematic illustration of the position of the sheath of the easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 3 is a schematic representation of the bladder state of the silicone after movement of the sheath of the easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 4 is a schematic illustration of the placement of anchoring hooks of the easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 5 is a schematic side view of an anchoring hook of the easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 6 is a schematic illustration of the anchoring hooks of the balloon of the easy-to-deliver vascular filter for pulmonary embolism of the present application after elongation;
FIG. 7 is a schematic illustration of the position of a pull wire of the easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 8 is a schematic view of the construction of a sheath of an easy-to-deliver vascular filter for pulmonary embolism of the present application;
FIG. 9 is a schematic illustration of the arcuate strip position of an easy delivery vascular filter for pulmonary embolism of the present application;
fig. 10 is a schematic view showing a state of an arcuate shape after sliding a sliding housing of an easy-to-transport vascular filter for pulmonary embolism of the present application.
In the figure:
a hook connection part 100;
an outer cover 200;
a compression spring 300;
a stopper 400;
a filter arm 500;
an anchor arm 600, a silica gel capsule 610, a scratch-proof plate 611, and an anchor hook 620;
a sheath 700, a sliding shell 710, arcuate strips 720;
a pull wire 800.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings; the preferred embodiments of the present application are illustrated in the drawings, however, the present application may be embodied in many different forms and is not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used herein for illustrative purposes only and do not represent the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic diagram of a filter structure of an easy-to-deliver vascular filter for pulmonary embolism according to the present application is shown; the easy-to-transport vascular filter for pulmonary embolism of the application comprises a hook connecting part 100, an outer cover 200, a compression spring 300, a limiting block 400, a filter arm 500, an anchoring arm 600 and a tube sheath 700; the limiting block 400 is positioned inside the outer cover 200; the pressure spring 300 is positioned in the outer cover 200, and the pressure spring 300 is fixed between the outer cover 200 and the limiting block 400; a silica gel bag 610 is fixed on the anchoring arm 600, and the silica gel bag 610 is sleeved on the anchoring arm 600; the anchoring arm 600 is sleeved with a tube sheath 700, and the inner wall of the tube sheath 700 is in sliding connection with the outer wall of the anchoring arm 600; one end of the tube sheath 700, which is far away from the outer cover 200, is fixedly connected with one end of the silica gel bag 610, which is close to the outer cover 200; a traction wire 800 is fixed on the tube sheath 700, and one end of the traction wire 800, which is far away from the tube sheath 700, is fixed on the limiting block 400; the technical effect that the filter can be stably positioned in the blood vessel is achieved when the blood pressure of the blood vessel in which the filter is implanted is too high or the thrombus in the blood vessel is large, and the anchoring arm 600 cannot shrink to the inside of the sheath 700 when the hook connecting part 100 slides relative to the outer cover 200 under the pushing of the blood or the thrombus.
Example 1
As shown in fig. 1, the easy-to-transport vascular filter for pulmonary embolism of the present application includes a hooking connection part 100, an outer cover 200, a compression spring 300, a stopper 400, a filter arm 500, and an anchor arm 600; the hook connecting part 100 comprises a hook and a connecting rod, and the hook is fixed on the connecting rod; one end of the connecting rod, which is far away from the hook, is fixedly connected with a limiting block 400, and the whole limiting block 400 is a circular block; the whole outer cover 200 is a hollow cylinder with an opening at the bottom end, and the limiting block 400 is positioned in the outer cover 200; the hook is positioned above the outer cover 200, and the connecting rod passes through the outer cover 200 to extend into the outer cover 200; the pressure spring 300 is positioned in the outer cover 200, and the pressure spring 300 is fixed between the outer cover 200 and the limiting block 400; one end of the pressure spring 300, which is close to the hook, is fixed on the inner wall of one end of the outer cover 200, which is close to the hook, and one end of the pressure spring 300, which is far away from the hook, is fixed on the limiting block 400; the number of the filter arms 500 is multiple, and the filter arms 500 are uniformly fixed on the limiting block 400 at the round edge of one end far away from the hook connecting part 100; the number of the anchoring arms 600 is plural, and the plurality of the anchoring arms 600 are uniformly fixed on the outer cover 200 at the round edge of one end far away from the hook connecting part 100; an anchoring hook 620 is fixed to one end of the anchoring arm 600, which is far away from the hooking connection part 100, and the hook tip of the anchoring hook 620 extends in a direction far away from the central axis of the outer cap 200.
Preferably, the compression spring 300 is a memory alloy spring.
Preferably, the diameter of the cross-section circle of the limiting block 400 is the same as that of the cross-section circle of the inner space of the outer cover 200, and the limiting block 400 is in sliding connection with the inner wall of the outer cover 200; the filter arm 500 length is no greater than the anchor arm 600 length; the length of the sheath 700 is between one third and one half of the length of the anchoring arm 600.
As shown in fig. 2, 4, 5 and 7, the anchoring arm 600 is fixed with a silica gel capsule 610; the shape of the silica gel bag 610 is a torus when the silica gel bag 610 is not subjected to external force, and the silica gel bag 610 is sleeved on the anchoring arm 600; a groove corresponding to the anchoring hook 620 is formed at one end of the silica gel capsule 610 far away from the hook connecting portion 100, and the anchoring hook 620 is located in the groove, so that the silica gel capsule 610 semi-surrounds the anchoring hook 620; a scratch-proof plate 611 is arranged on one side of the groove close to the hook connecting part 100 to prevent the anchoring hook 620 from scratching the silica gel bag 610; the anchoring arm 600 is sleeved with a tube sheath 700, and the inner wall of the tube sheath 700 is in sliding connection with the outer wall of the anchoring arm 600; the sheath 700 is located between the silicon capsule 610 and the outer cap 200; one end of the sheath 700 far away from the outer cover 200 is fixedly connected with one end of the silica gel bag 610 near the outer cover 200; the length of the sheath 700 is less than the length of the anchoring arm 600; the end of the sheath 700, which is close to the outer cover 200, is fixed with a traction wire 800, and the end of the traction wire 800, which is far away from the sheath 700, is fixed on the limiting block 400.
Preferably, the scratch-proof plate 611 is made of polyurethane material, and the height of the scratch-proof plate 611 is not less than the length of the anchoring hook 620; the silica gel bag 610 is made of medical silica gel, and the inside of the silica gel bag 610 is filled with gas; the traction wire 800 is woven from polyester fibers.
As shown in fig. 2, 3 and 6, when the stopper 400 is pushed by the blood in the blood vessel, the stopper 400 slides toward the outer cover 200, and the stopper 400 pulls the sheath 700 toward the outer cover 200 through the pull wire 800; when the sheath 700 slides along the anchor arm 600 toward the outer cap 200, the silicon capsule 610 is stretched by the sheath 700; after the silicone bladder 610 is elongated, the width of the silicone bladder 610 becomes smaller and the hook tips of the anchoring hooks 620 are exposed.
Further, the hook connection part 100 moves towards the silicon capsule 610 under the pushing of the matched conveyor, the tube sheath 700 is reduced under the pulling force from the pulling wire 800, the silicon capsule 610 pulls the tube sheath 700 away from the outer cover 200, so that the silicon capsule 610 semi-surrounds the anchoring hooks 620 again, and the anchoring hooks 620 are slowly pulled out of the blood vessel in the process; after the anchoring hooks 620 are pulled out of the vessel, the filter is retrieved from the vessel by the delivery device and catheter; the conveyor and the catheter are both prior art and are not described in detail herein.
The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:
the technical effect that when the blood pressure of the blood vessel in which the filter is implanted is overlarge or the thrombus in the blood vessel is larger, and the hook connecting part 100 slides relative to the outer cover 200 under the pushing of the blood or the thrombus, the condition that the anchoring arm 600 is contracted into the interior of the tube sheath 700 can not occur is realized, and the filter can be stably positioned in the blood vessel is realized; by arranging the silicon capsule 610 and the tube sheath 700, the filter can adjust the depth of the anchoring hooks 620 penetrating into the blood vessel according to the blood pressure of the implanted blood vessel and the blockage degree of the thrombus of the blood vessel, so that the damage of the anchoring hooks 620 to the blood vessel is reduced while the stability of the filter is ensured; the silicon capsule 610 interferes with the blood vessel, further increasing the stability of the filter within the blood vessel; when the filter is recovered, the anchoring hooks 620 are directly pulled out under the action of the silica gel capsule 610, so that the blood vessel is not scratched, and the anchoring hooks 620 are semi-enclosed by the silica gel capsule 610 in the conveying process of the filter, so that the blood vessel is not damaged.
Example two
When the vascular filter for pulmonary embolism in the above embodiment is used for thrombus filtration, more or larger thrombus may occur, resulting in lower filtration efficiency of the filter arm 500; the embodiments of the present application optimize the sheath 700 and the pull wire 800 to some extent based on the above embodiments.
As shown in fig. 8, 9 and 10, the sheath 700 includes a sliding housing 710 and an arcuate strip 720; the sliding shell 710 is integrally tubular, and the sliding shell 710 is sleeved on the filter arm 500; one end of the arched strip 720 far away from the hook connecting part 100 is fixed at the middle position of the sliding shell 710, and the arched strip 720 is positioned at one side of the sliding shell 710 facing the central shaft of the outer cover 200; the whole of the arched strip 720 is arc-shaped, and the arched strip 720 protrudes towards the central axis of the outer cover 200; the end of the arcuate strip 720 remote from the anchoring hooks 620 is secured to the outer cap 200.
Preferably, the arcuate strips 720 are made of memory alloy.
Further, the end of the traction wire 800 far from the outer cover 200 is fixed at the middle position of the sliding housing 710; when the traction wire 800 pulls the sheath 700 to slide toward the outer cap 200, the traction wire 800 can perform a wire cutting function on thrombus accumulated in the filter; when the sheath 700 slides toward the outer cap 200, the sliding housing 710 approaches the outer cap 200, the bending degree of the arcuate strips 720 becomes large, and the arcuate strips 720 protrude toward the central axis of the outer cap 200, so that the thrombus deposited in the filter can be extruded and cut.
The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:
through setting up bow-shaped strip 720, pile up the filtration of cutting through the wire cutting of pull wire 800, the extrusion segmentation of bow-shaped strip 720 and filter arm 500 of thrombus in the filter for the accumulative thrombus filters through multiple segmentation method, has improved the filter effect of filter, and the filter can be according to the dynamics and the degree of depth that the accumulative degree of severity automatic change pull wire 800 wire cutting and bow-shaped strip 720 extrusion segmentation of thrombus.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. An easy-to-transport vascular filter for pulmonary embolism is characterized by comprising a hook connecting part (100), an outer cover (200), a pressure spring (300), a limiting block (400), a filter arm (500), an anchoring arm (600) and a tube sheath (700);
the whole of the outer cover (200) is a hollow cylinder with an opening at the bottom end, and the limiting block (400) is positioned in the outer cover (200);
the pressure spring (300) is positioned in the outer cover (200), and the pressure spring (300) is fixed between the outer cover (200) and the limiting block (400);
a silicon capsule (610) is fixed on the anchoring arm (600);
the shape of the silica gel bag (610) is a torus when the silica gel bag (610) is not subjected to external force, and the silica gel bag (610) is sleeved on the anchoring arm (600);
the anchoring arm (600) is sleeved with a tube sheath (700), and the inner wall of the tube sheath (700) is in sliding connection with the outer wall of the anchoring arm (600);
the sheath (700) is located at a position between the silicon capsule (610) and the outer cover (200);
one end of the tube sheath (700) far away from the outer cover (200) is fixedly connected with one end of the silica gel bag (610) close to the outer cover (200);
a traction wire (800) is fixed on the tube sheath (700), and one end of the traction wire (800) far away from the tube sheath (700) is fixed on the limiting block (400);
the number of the filter arms (500) is multiple, and the filter arms (500) are uniformly fixed on the limiting block (400) at the round edge of one end far away from the hook connecting part (100);
the number of the anchoring arms (600) is multiple, and the anchoring arms (600) are uniformly fixed on the round edge of one end of the outer cover (200) far away from the hook connecting part (100);
an anchoring hook (620) is fixed at one end of the anchoring arm (600) far away from the hook connecting part (100), and the hook tip of the anchoring hook (620) extends towards the direction far away from the central shaft of the outer cover (200);
the hook connecting part (100) comprises a hook and a connecting rod, and the hook is fixed on the connecting rod;
one end of the connecting rod, which is far away from the hook, is fixedly connected with a limiting block (400), and the whole limiting block (400) is a circular block;
the hook is positioned above the outer cover (200), and the connecting rod penetrates through the outer cover (200) and extends into the outer cover (200);
one end of the pressure spring (300) close to the hook is fixed on the inner wall of one end of the outer cover (200) close to the hook, and one end of the pressure spring (300) far away from the hook is fixed on the limiting block (400);
one end of the silica gel bag (610) far away from the hook connecting part (100) is provided with a groove corresponding to the anchoring hook (620), and the anchoring hook (620) is positioned in the groove, so that the silica gel bag (610) semi-surrounds the anchoring hook (620);
a rectangular scratch-proof plate (611) is arranged on one side of the groove, which is close to the hook connecting part (100), and the anchoring hook (620) is prevented from scratching the silicon capsule (610).
2. The easy-to-deliver vascular filter for pulmonary embolism as claimed in claim 1, wherein the stopper (400) has a cross-sectional circle diameter identical to that of the inner space of the outer cap (200), and the stopper (400) is slidably coupled to the inner wall of the outer cap (200).
3. The easy-to-deliver vascular filter for pulmonary embolism of claim 2, wherein the filter arm (500) length is no greater than the anchor arm (600) length;
the sheath (700) length value is between one third and one half of the anchoring arm (600) length value;
the height of the scratch-proof plate (611) is not less than the length of the anchoring hooks (620).
4. A vascular filter for pulmonary embolism easy delivery as claimed in claim 3, wherein the silica gel bag (610) is made of medical silica gel, and the inside of the silica gel bag (610) is filled with gas;
the traction wire (800) is woven by polyester fibers;
the scratch-proof plate (611) is made of polyurethane material;
the pressure spring (300) is a memory alloy spring.
5. The easy-to-deliver vascular filter for pulmonary embolism of claim 4, wherein the sheath (700) comprises a sliding shell (710) and an arcuate strip (720);
the sliding shell (710) is integrally tubular, and the sliding shell (710) is sleeved on the filter arm (500);
one end of the arched strip (720) far away from the hook connecting part (100) is fixed at the middle position of the sliding shell (710), and the arched strip (720) is positioned at one side of the sliding shell (710) facing the central shaft of the outer cover (200).
6. The transportable vascular filter for pulmonary embolism of claim 5, wherein the arcuate strips (720) are arc-shaped as a whole, and the arcuate strips (720) are convex toward the central axis of the outer cap (200);
one end of the arch-shaped strip (720) far away from the anchoring hook (620) is fixed on the outer cover (200);
the arch-shaped strip (720) is made of memory alloy.
7. The easy-to-deliver vascular filter for pulmonary embolism as claimed in claim 6, wherein the end of the pull wire (800) remote from the outer cap (200) is fixed at a central position of the sliding housing (710).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753594.2A CN116492107B (en) | 2023-06-26 | 2023-06-26 | Easily-transported vascular filter for pulmonary embolism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310753594.2A CN116492107B (en) | 2023-06-26 | 2023-06-26 | Easily-transported vascular filter for pulmonary embolism |
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| CN116492107B true CN116492107B (en) | 2023-09-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830027A (en) * | 2014-03-21 | 2014-06-04 | 董绍安 | Accurate positioning human body lumen support placing device |
| CN208678150U (en) * | 2017-09-28 | 2019-04-02 | 先健科技(深圳)有限公司 | Foley's tube |
| CN217510573U (en) * | 2022-05-31 | 2022-09-30 | 中国人民解放军陆军军医大学第二附属医院 | Laparoscope puncture outfit with fixing device |
| CN115607330A (en) * | 2022-12-16 | 2023-01-17 | 北京心祐医疗科技有限公司 | Vena cava filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107348990B (en) * | 2017-08-25 | 2020-04-07 | 蔡改贫 | Ultrasonic bolt removing system |
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- 2023-06-26 CN CN202310753594.2A patent/CN116492107B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830027A (en) * | 2014-03-21 | 2014-06-04 | 董绍安 | Accurate positioning human body lumen support placing device |
| CN208678150U (en) * | 2017-09-28 | 2019-04-02 | 先健科技(深圳)有限公司 | Foley's tube |
| CN217510573U (en) * | 2022-05-31 | 2022-09-30 | 中国人民解放军陆军军医大学第二附属医院 | Laparoscope puncture outfit with fixing device |
| CN115607330A (en) * | 2022-12-16 | 2023-01-17 | 北京心祐医疗科技有限公司 | Vena cava filter |
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| CN116492107A (en) | 2023-07-28 |
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