CN219700038U - Aspiration embolectomy system - Google Patents
Aspiration embolectomy system Download PDFInfo
- Publication number
- CN219700038U CN219700038U CN202223015929.0U CN202223015929U CN219700038U CN 219700038 U CN219700038 U CN 219700038U CN 202223015929 U CN202223015929 U CN 202223015929U CN 219700038 U CN219700038 U CN 219700038U
- Authority
- CN
- China
- Prior art keywords
- thrombus
- net
- catheter
- thrombus taking
- balloon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000013156 embolectomy Methods 0.000 title claims description 15
- 208000007536 Thrombosis Diseases 0.000 claims abstract description 165
- 238000011084 recovery Methods 0.000 claims abstract description 45
- 210000005077 saccule Anatomy 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000012800 visualization Methods 0.000 claims 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims 1
- 239000010952 cobalt-chrome Substances 0.000 claims 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims 1
- 210000004204 blood vessel Anatomy 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 16
- 239000008280 blood Substances 0.000 abstract description 8
- 210000004369 blood Anatomy 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002537 thrombolytic effect Effects 0.000 description 23
- 239000003146 anticoagulant agent Substances 0.000 description 16
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 208000010378 Pulmonary Embolism Diseases 0.000 description 4
- 206010047249 Venous thrombosis Diseases 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 241001589086 Bellapiscis medius Species 0.000 description 3
- 206010051055 Deep vein thrombosis Diseases 0.000 description 3
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 3
- 230000003902 lesion Effects 0.000 description 3
- 210000003141 lower extremity Anatomy 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- 206010052428 Wound Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229940127219 anticoagulant drug Drugs 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 239000000788 chromium alloy Substances 0.000 description 2
- MMAADVOQRITKKL-UHFFFAOYSA-N chromium platinum Chemical compound [Cr].[Pt] MMAADVOQRITKKL-UHFFFAOYSA-N 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 210000003692 ilium Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 206010014522 Embolism venous Diseases 0.000 description 1
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 1
- 108010023197 Streptokinase Proteins 0.000 description 1
- 102000003978 Tissue Plasminogen Activator Human genes 0.000 description 1
- 108090000373 Tissue Plasminogen Activator Proteins 0.000 description 1
- 102000003990 Urokinase-type plasminogen activator Human genes 0.000 description 1
- 108090000435 Urokinase-type plasminogen activator Proteins 0.000 description 1
- 206010070995 Vascular compression Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000010100 anticoagulation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003527 fibrinolytic agent Substances 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000003055 low molecular weight heparin Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000001991 pathophysiological effect Effects 0.000 description 1
- 210000001147 pulmonary artery Anatomy 0.000 description 1
- 230000004088 pulmonary circulation Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 229960005202 streptokinase Drugs 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 229960005356 urokinase Drugs 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 208000004043 venous thromboembolism Diseases 0.000 description 1
- PJVWKTKQMONHTI-UHFFFAOYSA-N warfarin Chemical compound OC=1C2=CC=CC=C2OC(=O)C=1C(CC(=O)C)C1=CC=CC=C1 PJVWKTKQMONHTI-UHFFFAOYSA-N 0.000 description 1
- 229960005080 warfarin Drugs 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model discloses a suction thrombus taking system, which comprises an outer sheath tube, a thrombus taking assembly and a balloon catheter, wherein the thrombus taking assembly is arranged in the outer sheath tube and can axially move relative to the outer sheath tube; the distal end of the thrombus taking component is provided with a thrombus taking recovery net; by arranging the outer sheath tube with negative pressure suction and matching with the thrombus taking net and the saccule catheter, thrombus can be quickly and smoothly taken out, so that the thrombus suction frequency is reduced, and the blood loss of a patient is reduced; the thrombus taking assembly and the balloon catheter are arranged in the sheath tube in a non-coaxial mode, so that the suction space in the sheath tube is ensured, the process difficulty is reduced, and the manufacturing cost is reduced; meanwhile, the damage to the inner wall of the blood vessel can be greatly reduced by adopting a mode of negative pressure suction and balloon retraction mechanical thrombus removal; the adjustable knob is matched with the traction wire to perform shrinkage adjustment and control on the thrombus taking recovery net, so that thrombus is prevented from escaping freely from the head end of the thrombus taking recovery net during thrombus taking.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a suction thrombus taking system.
Background
Pulmonary thromboembolism (PE) refers to a disease caused by a thrombus from the venous system or the right heart blocking the pulmonary artery or its branches, and is the most common type of pulmonary embolism with pulmonary circulation (including the right heart) and respiratory dysfunction as main clinical manifestations and pathophysiological features; for the treatment of venous thromboembolism, three forms are currently involved: (1) drug anticoagulant therapy: the anticoagulation treatment can effectively prevent thrombosis and recurrence. Commonly used anticoagulants include plain heparin, low molecular heparin, warfarin, and the like. (2) catheter thrombolysis: at present, deep venous thrombosis of lower limbs is mainly characterized by catheter thrombolysis. Thrombolytic drugs include urokinase, streptokinase, recombinant tissue type plasminogen activator, and the like. Is suitable for patients in acute stage without thrombolysis contraindication and severe lower limb deep vein thrombosis and pulmonary embolism. (3) surgical thrombolysis: the operation is suitable for patients with severe lower limb deep vein thrombosis such as ilium vein thrombosis and femoral bruise, and the operation needs to pay attention to treatment of ilium vein compression.
In the prior art, mechanical thrombus ablation in a venous cavity is commonly adopted, namely, thrombus is taken by adopting a thrombus negative pressure suction operation or a thrombus crushing device; when the thrombus is extracted by adopting the negative pressure suction technology, the thrombus can be sucked into the catheter once or a plurality of times through simple operation, so that the blood at the lesion can circulate. Generally, thrombus at a lesion site cannot be completely withdrawn at one time, and a doctor is required to perform catheter aspiration several times, so that the amount of thrombus withdrawn each time decreases with the increase of the number of aspiration times, but the amount of blood withdrawn increases. And because the bending degree of the blood vessel of the human body is different, the complete alignment of the aspiration catheter and thrombus at the lesion part can not be ensured in the aspiration process of doctors, so that the condition of unexpected pure aspiration of blood can be generated, and excessive blood loss of patients can be caused. However, if the size of the aspiration catheter is reduced, the blood loss of the patient is reduced, the aspiration effect of thrombus is weakened, and even the aspiration frequency is increased, so that the damage to the patient is still unavoidable. Especially for the suction of pulmonary thrombus, as the thrombus suction position is close to the vascular branch, the thrombus is easy to displace in the process or slide into the right branch from the left branch, so that the subsequent suction difficulty is directly increased; therefore, a thrombus taking-out system which can take out thrombus quickly and smoothly, reduce the thrombus suction times, avoid thrombus escape and free, reduce the blood loss of patients and has low manufacturing cost is designed, and the thrombus taking-out system has great necessity for venous thrombus treatment.
Disclosure of Invention
In view of the shortcomings in the art described above, the present utility model provides a suction thrombolysis system comprising an outer sheath, a thrombolysis assembly and a balloon catheter; the thrombus taking assembly is arranged in the outer sheath tube and can axially move relative to the outer sheath tube, and the balloon catheter is arranged in a gap between the outer sheath tube and the thrombus taking assembly and can at least axially move relative to the thrombus taking assembly;
the thrombus taking assembly comprises a supporting connecting piece and a thrombus taking recovery net which is arranged at the far end of the supporting connecting piece and can be self-expanded, and one end of the thrombus taking recovery net, which is far away from the supporting connecting piece, is provided with an expansion net opening;
the balloon catheter comprises a catheter with a distal end penetrating through the thrombus taking and recovering net and a balloon positioned at the distal end of the catheter, wherein the balloon is opposite to the expanding net port and is used for being matched with the thrombus taking and recovering net to prevent thrombus from escaping.
In one embodiment, the balloon catheter further comprises a traction wire and a regulating knob arranged at the proximal end of the balloon catheter, one end of the traction wire is connected with the expansion net mouth, the other end of the traction wire is connected with the regulating knob, and the regulating knob is used for traction of the traction wire to control traction and tightening of the expansion net mouth.
In one embodiment, the traction wire is arranged in the inner cavity of the catheter in a penetrating way and can axially move relative to the catheter; the regulating knob is arranged on the base at the proximal end of the balloon catheter.
In one embodiment, the catheter includes a first lumen for the pull wire to pass through and a second lumen for balloon ventilation; the side wall of the catheter, which is positioned between the saccule and the distal end of the catheter, is provided with a threading through hole which penetrates through the first inner cavity, one end of the traction wire is connected with the regulating knob at the proximal end, and the other end of the traction wire penetrates out of the threading through hole and is connected with the expansion net mouth.
In one embodiment, at least two traction wires are arranged and respectively connected with two opposite sides of the expansion net mouth.
In one embodiment, a developing structure is further provided, and the developing structure comprises a first developing point arranged at the penetrating position of the catheter on the thrombus removal recovery net and/or a second developing point symmetrically arranged on the expansion net mouth and/or a third developing point arranged at the periphery of the threading through hole.
In one embodiment, the material of the thrombus removal recovery mesh and/or the traction wire is any one or more of stainless steel, nickel-titanium alloy, cobalt-chromium alloy, platinum-chromium alloy and titanium.
In one embodiment, a connecting structure is arranged at the connecting position of the supporting connecting piece and the thrombus taking and recovering net, the connecting structure comprises a steel sleeve connecting piece and a bolt connecting piece, and the steel sleeve connecting piece is in threaded fit with the bolt connecting piece.
In one embodiment, the thrombolytic recovery net is provided with a side hole for the catheter to pass through, and the shape of the side hole is any one of a circle, a diamond, a rectangle and a triangle.
In one embodiment, the expanded mesh opening is in the shape of a bevel cut.
The beneficial effects of the utility model are as follows: compared with the prior art, the suction thrombus taking system provided by the utility model has the advantages that by arranging the negative pressure suction outer sheath tube and combining the thrombus taking assembly and the balloon catheter, thrombus can be quickly and smoothly taken out, the thrombus suction times are reduced, and the blood loss of a patient is reduced; the thrombus taking component and the balloon catheter are arranged in a non-coaxial way, so that the process difficulty is reduced and the manufacturing cost is reduced while the suction space in the sheath tube is ensured; meanwhile, the damage to the inner wall of the blood vessel can be greatly reduced by adopting a mode of negative pressure suction and balloon retraction mechanical thrombus removal; the adjustable knob is matched with the traction guide wire to perform shrinkage adjustment and control on the thrombus taking recovery net, so that thrombus is prevented from escaping freely from a net opening of the thrombus taking recovery net during thrombus taking.
Drawings
FIG. 1 is a schematic diagram of a suction thrombus removal system according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a thrombolytic device according to the present utility model;
FIG. 3 is a schematic view of a balloon catheter according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a three-support connector and a thrombolytic recovery net according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a suction thrombus removal system according to a second embodiment of the present utility model;
FIG. 6 is a schematic diagram showing a state before intravascular suction according to a second embodiment of the present utility model;
FIG. 7 is a schematic view showing a retracted state of an intravascular balloon catheter according to a second embodiment of the present utility model;
FIG. 8 is a schematic view showing a release state of an intravascular balloon catheter according to a second embodiment of the present utility model;
FIG. 9 is a schematic diagram showing a state of intravascular traction wire tightening according to a second embodiment of the present utility model;
fig. 10 is an internal cross-sectional view of a balloon catheter in accordance with a second embodiment of the present utility model.
Detailed Description
In order that the utility model may be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings, which are given by way of illustration only and not limitation.
The utility model relates to a thrombus taking component and a suction thrombus taking system, which are characterized in that one end which is close to the outside of a human body or used for operation is defined as a proximal end, and one end which is positioned in the human body and is close to thrombus is defined as a distal end.
Example 1
Referring to fig. 1-3, in the present embodiment, the aspiration thrombolysis system 10 includes an outer sheath 1, wherein a thrombolysis component 2 is disposed in a lumen of the outer sheath 1 and penetrates the lumen of the outer sheath 1 while being capable of moving axially with respect to the lumen; the proximal end of the outer sheath tube 1 is provided with a luer connector 4 for connecting a suction device; the luer connector 4 is connected with an external negative pressure suction device and is continuously opened, and under the action of negative pressure in the cavity, the middle part of the blood vessel cavity is pulled out of the thrombus; the balloon catheter 3 is arranged in the gap between the outer sheath tube and the thrombus taking assembly in a non-coaxial side-by-side manner; the thrombus taking assembly 2 comprises a supporting connecting piece 22, wherein the proximal end of the supporting connecting piece 22 is connected with a guide wire twister 21, and the distal end is connected with a self-expandable thrombus taking recovery net 25; when the thrombus taking and recovering net 25 is released from the outer sheath tube 1, the thrombus taking and recovering net can be self-expanded and expanded to form an interception net for thrombus; the catheter of the balloon catheter 3 passes through and extends from the thrombus taking and recovering net 25, so that the balloon 31 at the distal end of the balloon catheter 3 and the thrombus taking and recovering net 25 are positioned at opposite positions in a blood vessel, and are matched with each other to form a suction thrombus taking structure capable of preventing thrombus from escaping; the connecting position of the supporting connecting piece 22 and the thrombus taking and recovering net 25 is provided with a connecting structure, the connecting structure comprises a steel sleeve connecting piece 23 and a bolt connecting piece 24, and the steel sleeve connecting piece 23 and the bolt connecting piece 24 are in threaded fit; the adoption of the bolt connecting piece 24 can enable the thrombus taking recovery net 25 to have better compliance when entering the human blood vessel early, so that the risk of scratching the inner wall of the blood vessel is reduced;
referring to fig. 3, the balloon 31 of the balloon catheter 3 is disposed on the catheter near the distal end, and after passing through the thrombus, the balloon 31 expands and contacts closely with the wall of the blood vessel to seal the blood vessel, thus forming a semi-closed aspiration environment; the proximal end base 32 of the balloon catheter 3 is connected with an expanding instrument by which the balloon 31 is expanded; the preferred expansion instrument may be a syringe;
in this embodiment, the position of the thrombolysis recovery net 25 for the catheter to pass through can be provided with a side hole 26, and the distal end of the balloon catheter 3 passes through and extends from the side hole 26; the side holes 26 may be machined in various shapes, such as circles, diamonds, rectangles, triangles, etc.; in this embodiment, referring to fig. 3, considering that the balloon 31 has a spherical shape in the post-expansion period and the balloon catheter 3 is also cylindrical, the side hole 26 is selected to be circular for better adaptability; the thrombus taking component 2 and the balloon catheter 3 are independently arranged, and a side hole is formed in the thrombus taking recovery net, so that the thrombus taking component 2 and the balloon catheter 3 form a structure which is not coaxially arranged, and the first aim of the arrangement mode is that, unlike the coaxial arrangement commonly used in the prior art, more axial through channels are prevented from being formed in the balloon catheter, the balloon catheter is a thinner pipeline, the pipe wall is thinner, more axial channels are processed on the pipe wall, the complexity of the process is increased, and therefore, the complexity of the process is reduced by taking the consideration from the angle of the processing process, so that the processing of the whole system is simpler, and the processing cost is reduced; secondly, avoid opening more axial through-holes in the inside of sacculus pipe more, can avoid sacculus pipe 3 too big at the space that sheath pipe 1 took up, can guarantee that sheath pipe 1 has enough big through-space when carrying out the suction, avoid thrombus to block up in the pipeline in the suction process.
In other embodiments, the end of the thrombolytic recovery net 25 far away from the support connector 22 is a self-expanding expanded net opening 29, the expanded net opening 29 can be provided with different net opening lengths to form an oblique incision shape, and the oblique incision shape of the expanded net opening 29 can increase the interception area of the thrombolytic recovery net 25 to thrombus; wherein the preferred extension of the portal on the same side as the side hole 26 through which the catheter passes is greater than the extension of the portal on the opposite side, this arrangement will cause the inflation portal 29 to form a bevel angle that will allow the catheter 3 to roll the retrieval net 25 as it passes through the retrieval net 25, thereby compensating for the catheter side tilt and avoiding any gaps between the retrieval net 25 and the vessel wall that would result in thrombus escaping.
In a preferred embodiment, as shown in FIG. 2, the expanded ports 29 having different lengths form a sloped port configuration, specifically with the shorter port length side increasing in radial length toward the longer port length side.
In a preferred embodiment, not shown in the drawings, the expanded openings 29 having different lengths form a stepped opening structure, specifically, the shorter side of the opening length and the longer side of the opening length are suddenly raised near the middle position of the expanded opening to form a stepped opening with a drop height, and the drop height position is in arc transition.
Preferably, the thrombus taking and recovering net 25 is made by adopting a metal braiding process and is of a cross-overlapping structure, and adjacent wires are distributed in a mutual pressure mode, so that the thrombus taking and recovering net 25 has good stacking resistance and turnover resistance when entering the outer sheath tube 1 with the luer connector 4 through the guide sheath; in order to prevent large thrombus from escaping from the gap of the thrombus removing and recovering net 25 when the balloon catheter 3 is used for removing the thrombus, the net structure of the thrombus removing and recovering net 25 is preferably in diamond-shaped distribution, and the wave angle is 75-110 degrees; the thrombolytic recovery net 25 is made of one or more of stainless steel, nickel-titanium alloy, cobalt-chromium alloy, platinum-chromium alloy and titanium. Nickel titanium alloy is used as the material in this example.
In this embodiment, the device is convenient to observe under the support of the apparatus by providing the development structure on the thrombus removing and recovering net 25, the development structure includes the first development points 27 provided on the periphery of the side hole 26 where the catheter passes through the thrombus removing and recovering, the first development points 27 can facilitate the positioning and calibrating positions of the operator when the balloon catheter 3 passes through the side hole 26, wherein the first development points 27 can be provided in plurality and are circumferentially arranged along the periphery of the side hole 26; preferably, a second developing point 28 is arranged at the position of the expansion net opening 29 of the thrombus taking and recovering net 25, and the second developing point 28 is symmetrically arranged along the circumferential direction of the expansion net opening 29, so that when the thrombus taking assembly 2 enters a human body, the front end is conveniently developed and positioned; preferably, when the thrombolytic recovery net 25 is set to have different net port lengths, the second developing points 28 are respectively disposed at the highest point and the lowest point of the expanded net port and symmetrically disposed.
Preferably, the first developing point 27 and the second developing point 28 are made of a non-transparent ray material, such as a metal or alloy material of gold, platinum, tantalum, or a non-transparent ray polymer material, such as a PTFE film.
In the embodiment, when puncture and thrombus taking are carried out, firstly, the outer sheath tube 1 with the inner sheath core is pushed into the body along the superhard guide wire, and then the inner sheath core is withdrawn; the super-hard guide wire passes through a side hole 26 on a thrombus taking and recovering net 25 at the head end of a thrombus taking and recovering assembly 2, the thrombus taking and recovering assembly 2 enters an outer sheath tube 1 with a luer connector 4 along the super-hard guide wire through an guiding sheath, a guide wire twister 21 is operated, the thrombus taking and recovering net 25 is pushed out from the front end of the outer sheath tube 1 and is released and unfolded, and an outer edge expansion net mouth of the thrombus taking and recovering net 25 is tightly attached to the inner cavity wall of a blood vessel, so that thrombus is prevented from leaking out from a gap between the outer edge of the thrombus taking and recovering net 25 and the inner wall of the blood vessel in the thrombus taking and recovering process; after the steps are finished, the balloon catheter 3 is guided by a superhard guide wire, enters the outer sheath tube 1, passes through the side hole 26 of the thrombus taking and recovering net 25 and reaches the front of the focus thrombus position; then the expansion of the balloon 31 is carried out by using an expansion instrument, for example, a medical injector is adopted and is connected with the base 32 of the balloon catheter 3, so that the balloon 31 is filled and clings to the inner wall of the blood vessel cavity, and a negative pressure environment is formed between the balloon 31 and the blood vessel cavity section with thrombus of the outer sheath 1; at the moment, the luer connector 4 on the outer sheath tube 1 is connected with an external negative pressure suction device, the external negative pressure suction device is continuously started, and under the negative pressure effect in the cavity, the large thrombus in the middle part of the blood vessel cavity is extracted; retracting the balloon catheter 3 after the suction action is completed; because the sacculus 31 at the front end of the sacculus catheter 3 is tightly attached to the vessel wall, the sacculus 31 can scrape and pull the thrombus remained on the inner wall of the vessel cavity into the thrombus taking-out recovery net 25 under the dragging action of the sacculus catheter 3 in the moving process, and the thrombus is recovered into the outer sheath tube 1 through the thrombus taking-out recovery net 25, so that all the thrombus is smoothly taken out.
Example two
Referring to fig. 2 and 5-9, the structure of the thrombus removing assembly and the outer sheath 01 of the present embodiment is substantially the same as that of the thrombus removing assembly and the outer sheath 01 of the first embodiment, except that the balloon catheter 06 is further provided with a traction wire 010, and the traction wire 010 is slidably disposed through the inner cavity of the catheter of the balloon catheter 06; a regulating knob 05 is arranged on the proximal end base of the balloon catheter 06; one end of the traction wire 010 is connected with an expansion net port of the thrombus taking recovery net 09, and the other end is connected with the regulating knob 05 at the proximal end; in this embodiment, at least two preferable traction wires 010 are provided and are respectively connected with two opposite sides of the expansion net mouth; wherein, a first inner cavity 061 for the traction wire 010 to slide through and a second inner cavity 062 for the ventilation of the balloon 013 are arranged in the balloon catheter 06; the side wall of the balloon catheter 06 between the balloon 013 and the distal end of the catheter is provided with a threading through hole 012 which penetrates through the first inner cavity 061; one end of the second inner cavity 062 is led to the balloon 013, and the other end is led to the proximal end of the balloon catheter 06 and is connected with the expanding instrument; one end of the traction wire 010 penetrates out of the wire penetrating hole 012 and is connected with an expansion net port of the thrombus taking recovery net 09, and the other end penetrates out of the proximal end and is connected with the regulation knob 05, and traction control is performed through the regulation knob 05; when in use, the traction wire 010 is adjusted by operating the adjusting knob 05, so that the head end of the thrombus taking and recovering net 09 can be contracted and sealed, thus thrombus 014 can be prevented from escaping from the thrombus taking and recovering net 09 when the thrombus taking and recovering net 09 is retracted;
in another embodiment, a net port tightening assembly is arranged at the edge of the expansion net port, the net port tightening assembly is in a structure that a plurality of wire loops are arranged along the net port, one end of a traction wire 010 is connected with the expansion net port, sequentially penetrates through the wire loops, penetrates out of the wire loops at the tail end and is connected to a regulating knob 05, and the outer diameter of the expansion net port is tightened and reduced by the traction wire under the traction action of the regulating knob at the near end; thereby forming a net mouth tightening structure.
Preferably, the distal end of the traction wire is fixedly connected with the expansion net mouth at the edge position of the expansion net mouth, the traction wire is spirally wound on the circumferential outer surface of the expansion net mouth after being connected, the proximal end extends towards the regulating knob after the winding is completed and is connected with the regulating knob, and the outer diameter of the expansion net mouth can be tightened and reduced by the traction wire under the traction action of the regulating knob at the proximal end; thereby forming a net mouth tightening structure.
The wire of the traction wire 010 is one or more of stainless steel, nickel-titanium alloy and cobalt-chromium alloy, and preferably adopts nickel-titanium alloy.
Preferably, the balloon catheter 06 is further provided with a third inner cavity 063 for passing the superhard guide wire, and the third inner cavity 063 is arranged and extends along the axial direction of the balloon catheter.
In this embodiment, a third developing point 011 is disposed at a position on the balloon catheter 06 near the threading through hole 012, the third developing point 011 is specifically a developing ring, and the third developing point 011 can display the position of the threading through hole 012 in vivo, so that the position is set, in the process of retracting or extending the balloon catheter 06, the relative position of the threading through hole 012 and the mesh opening of the thrombolytic recovery mesh 09 can be observed in cooperation with the second developing point 08, and the tightening degree in the process of tightening the inflation mesh opening.
Preferably, the third developing point 011 is made of a non-transparent ray material, such as gold, platinum, tantalum, or other metal or alloy materials, or a non-transparent ray polymer material, such as PTFE film.
In this embodiment, when performing puncture and thrombus removal, firstly, the balloon catheter 06 with the adjusting knob 05 is passed through the side hole 07 and the thrombus removal component, and is synchronously introduced into the outer sheath 01 through the guide sheath under the guidance of the superhard guide wire, and then enters the human body through the outer sheath 01, and the balloon catheter 06 is passed through the thrombus 014, so that the balloon 013 reaches the front of the thrombus 014; then, the balloon 013 is filled and clung to the inner wall of the blood vessel 015 cavity by connecting an expanding instrument such as a syringe and the like with the base 04, so that a negative pressure environment is formed between the balloon 013 and the blood vessel 015 cavity section with thrombus 014 between the outer sheath 01; connecting the luer connector 02 on the outer sheath tube 01 with an external suction device to extract thrombus 014 in the middle part of the lumen of a blood vessel 015 or in a free state and large thrombus 014; then the balloon catheter 06 is retracted, the balloon 013 drags and recovers the thrombus 014 clung to the inner wall of the lumen of the blood vessel 015, so that the thrombus 014 is recovered into the thrombus taking recovery net 09; in this step, when the balloon catheter 06 is retracted to the third developing point 011 and the second developing point 08 at the head end of the thrombolytic recovery net 09 are at the same horizontal plane, the balloon 013 is released to discharge the filling material in the balloon 013, the balloon 013 is restored to a shrunken state, meanwhile, the adjusting knob 05 is operated to enable the traction wire 010 to be recovered from the wire penetrating hole 012 and enter the first inner cavity 061, the traction wire 010 contracts the expanded net mouth of the thrombolytic recovery net 09, in this process, an operator observes the displacement of the two second developing points 08 arranged on the expanded net mouth of the thrombolytic recovery net 09 until the two second developing points 08 are compact together, and can confirm that the expanded net mouth of the thrombolytic recovery net 09 is tightened, and at this time, the thrombus 014 can be prevented from escaping from the thrombolytic recovery net 09 in the retracting process by retracting the thrombolytic assembly; finally, the thrombus 014 is taken out by synchronously withdrawing the thrombus taking assembly and the balloon catheter 06 through the guide wire twister 03 and entering the outer sheath of the conveyer.
Example III
Referring to fig. 4, the structure of the thrombus removing assembly and the outer sheath tube of the present embodiment is substantially the same as that of the first embodiment, and is different in that, in order to facilitate the thrombus removing assembly to enter the human body through the outer sheath tube, the support connecting member 14 in the thrombus removing assembly can be integrally manufactured by mutually hinging and winding metal braiding wires, and on this basis, the net surface is provided with side holes 12, that is, the wires at the tail end of the thrombus removing recovery net 11 are mutually wound and twisted to be fixed, so that the thrombus removing assembly is in a twine shape, and then the twisted twine-shaped support connecting member 14 is heat-shrunk and coated by using a polymer material, such as a PTFE film, so that the rigidity strength of the support connecting member 14 is enhanced.
The utility model has the advantages that:
1) The utility model adopts the modes of negative pressure suction, balloon retraction, reticular grabbing and sheath tube recovery to realize the extraction of thrombus; the negative pressure suction recovery of thrombus is carried out by adopting the outer sheath tube with the luer connector, so that the blockage of the outer sheath tube is not easy to be caused.
2) The thrombus taking recovery net can be well attached to the inner wall of a normal blood vessel, so that the thrombus can be prevented from being dispersed and dissociated in the process of taking out; meanwhile, the balloon is adopted for mechanical thrombus removal, so that damage to the inner wall of the blood vessel can be avoided.
3) The thrombus taking recovery net and the supporting connecting piece in the thrombus taking assembly are in flexible connection, so that the thrombus taking recovery net has good compliance in pushing the thrombus taking recovery net into a blood vessel, and the inner wall of the blood vessel is prevented from being scratched.
4) The thrombus taking and recovering net is provided with an inclined opening angle, so that when the thrombus taking component is pushed forward to pass through a blood vessel with a larger curvature radius, the thrombus taking and recovering net accords with pathological anatomy characteristics, and simultaneously, the expansion net opening angle of the balloon catheter during passing can be compensated, and thrombus escape is avoided.
5) The adjustable knob is matched with the traction wire to perform shrinkage adjustment and control on the thrombus taking recovery net, so that thrombus is prevented from escaping freely from the head end of the thrombus taking recovery net during thrombus taking.
The above disclosure is only a few specific embodiments of the present utility model, but the present utility model is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present utility model.
Claims (10)
1. A suction thrombus removal system, which is characterized by comprising an outer sheath tube, a thrombus removal assembly and a balloon catheter; the thrombus taking assembly is arranged in the outer sheath tube and can axially move relative to the outer sheath tube, and the balloon catheter is arranged in a gap between the outer sheath tube and the thrombus taking assembly and can at least axially move relative to the thrombus taking assembly;
the thrombus taking assembly comprises a supporting connecting piece and a thrombus taking recovery net which is arranged at the far end of the supporting connecting piece and can be self-expanded, and one end of the thrombus taking recovery net, which is far away from the supporting connecting piece, is provided with an expansion net opening;
the balloon catheter comprises a catheter with a distal end penetrating through the thrombus taking and recovering net and a balloon positioned at the distal end of the catheter, wherein the balloon is opposite to the expanding net port and is used for being matched with the thrombus taking and recovering net to prevent thrombus from escaping.
2. The aspiration embolectomy system of claim 1 further comprising a pull wire and a control knob disposed at a proximal end of the balloon catheter, one end of the pull wire being connected to the inflation port and the other end being connected to the control knob, the control knob being configured to pull the pull wire to control the pull tightening of the inflation port.
3. The aspiration embolectomy system of claim 2 wherein the pull wire is disposed through the lumen of the catheter and is axially movable relative to the catheter; the regulating knob is arranged on the base at the proximal end of the balloon catheter.
4. The aspiration embolectomy system of claim 3 wherein said catheter includes a first lumen for passage of said pull wire and a second lumen for balloon ventilation; the side wall of the catheter, which is positioned between the saccule and the distal end of the catheter, is provided with a threading through hole which penetrates through the first inner cavity, one end of the traction wire is connected with the regulating knob at the proximal end, and the other end of the traction wire penetrates out of the threading through hole and is connected with the expansion net mouth.
5. The aspiration embolectomy system of claim 4 wherein the pull wire is provided in at least two pairs, each pair being connected to opposite sides of the inflation port.
6. The aspiration embolectomy system of claim 5 further comprising a visualization structure comprising a first visualization point located on the embolectomy recovery screen at the catheter pass-through location and/or a second visualization point located on the inflation screen and symmetrically located and/or a third visualization point located on the periphery of the through-threading opening.
7. The aspiration embolectomy system of claim 2 wherein the material of the embolectomy recovery mesh and/or the traction wire is any one of stainless steel, nitinol, cobalt chrome, platinum chrome, and titanium.
8. The aspiration embolectomy system of claim 1 wherein the connection location of the support connector to the embolectomy recovery net is provided with a connection structure comprising a steel sleeve connector and a bolt connector, the steel sleeve connector being threadably engaged with the bolt connector.
9. The aspiration embolectomy system of claim 1 wherein the embolectomy recovery mesh is provided with side holes through which the catheter passes, the side holes being any one of circular, diamond-shaped, rectangular, and triangular in shape.
10. The aspiration embolectomy system of any one of claims 1-9 wherein the expanded mesh port is in the shape of a bevel cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015929.0U CN219700038U (en) | 2022-11-11 | 2022-11-11 | Aspiration embolectomy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015929.0U CN219700038U (en) | 2022-11-11 | 2022-11-11 | Aspiration embolectomy system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219700038U true CN219700038U (en) | 2023-09-19 |
Family
ID=87983366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223015929.0U Active CN219700038U (en) | 2022-11-11 | 2022-11-11 | Aspiration embolectomy system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219700038U (en) |
-
2022
- 2022-11-11 CN CN202223015929.0U patent/CN219700038U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11246611B2 (en) | Clot removal device and method of using same | |
| CN106618676B (en) | Intravascular thrombus taking-out device | |
| EP2736425B1 (en) | Intravascular thromboembolectomy device | |
| EP3128950B1 (en) | A kit for placing a bypass | |
| CN108348267A (en) | Thrombus with blood flow limitation removes device and correlation technique | |
| TW202207880A (en) | Thrombectomy device for extraction of vascular thrombi from a blood vessel | |
| CN208910390U (en) | Take pin device and intervention medical system | |
| CN105662533B (en) | Blood vessel thrombus taking device with spiral structure and thrombus therapeutic instrument thereof | |
| EP0956078A1 (en) | Expandable lumen device and method of use | |
| JP2003526451A (en) | Vascular embolism prevention device using a filter | |
| US11376028B1 (en) | Devices, systems, and methods for removing obstructive material from body lumens | |
| US11596427B2 (en) | Tools for sheathing treatment devices and associated systems and methods | |
| CN114391917B (en) | Diameter-variable thrombus taking device and use method thereof | |
| CN217244648U (en) | Variable-diameter plug taking device | |
| US20230055766A1 (en) | Securing element for resheathing an intravascular device and associated systems and methods | |
| CN114513995A (en) | Balloon basket catheter device | |
| JP2018143577A (en) | Medical device, medical system, and treatment method | |
| CN111683604A (en) | Thrombus clearing catheter and use method | |
| CN114587499A (en) | Vascular opening device | |
| CN116942255B (en) | Thrombus removing device | |
| US20220015784A1 (en) | Apparatus and method for treatment of post thrombotic syndrome | |
| CN219700038U (en) | Aspiration embolectomy system | |
| CN116509506A (en) | Thrombolysis device and thrombolysis device | |
| JP2023066408A (en) | Bevel tip expandable mouth catheter with reinforcing ring | |
| CN219354073U (en) | Thrombolysis device and thrombolysis device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |