Search

CN-119924940-B - Thrombus taking support and thrombus removing system

CN119924940BCN 119924940 BCN119924940 BCN 119924940BCN-119924940-B

Abstract

The invention provides a thrombus taking support and a thrombus removing system, which relate to the technical field of medical equipment, wherein the thrombus taking support comprises a support and a basket supported on a far end section of an elongated control rod, the support and the basket are in an expanded state relative to an initial state, the support comprises a support body, the support body is in a form of expanding into a cage-shaped structure, the support body is used for cutting or scraping thrombus, the basket comprises ribs and pores, the basket is used for intercepting or capturing free thrombus, the radial supporting force of the support is larger than the radial supporting force of the basket, or the radial supporting capacity of the support is larger than the radial supporting capacity of the basket, and the thrombus taking support in the scheme combines the cutting and capturing functions and can treat thrombus of different types and states in one operation.

Inventors

  • JING YUCHEN
  • XIN SHIJIE
  • ZHAO ZHONG

Assignees

  • 归创通桥医疗科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250228

Claims (16)

  1. 1. A thrombus taking support comprises a support and a basket supported on a distal section of an elongated control rod, wherein the support and the basket are in an expanded state relative to an initial state, the support comprises a support body, the support body is in a form of expanding into a cage-shaped structure and is used for cutting or scraping thrombus, the basket comprises ribs and holes, the basket is used for intercepting or capturing free thrombus, radial supporting force of the support is larger than radial supporting force of the basket or radial supporting force of the support is larger than radial supporting force of the basket, the basket comprises a proximal basket hub which is arranged at the proximal end of the basket and is capable of increasing friction force and winding force through deformation when contacting with the viscous thrombus compared with the support, the basket further comprises a base line which is arranged at the proximal end of the basket, basket spokes, one end of each basket spoke is fixedly connected with the proximal basket hub, at least 3 basket spokes are circumferentially arranged at intervals on the proximal basket spoke, in the expanded state, the basket is provided with a radial supporting force which extends towards the distal end of the basket hub far away from the proximal basket hub, the basket hub is far from the proximal basket hub, the bottom line is in the radial supporting force of the basket hub, and the bottom line is in the wave form which is far away from the base line of the thrombus, and the bottom line is formed far from the base line of the longitudinal wave form, and the bottom line is further in the wave form which is far from the wave form, and the wave form is far from the base line of the bottom line is formed far from the bottom line of the bottom line.
  2. 2. A thrombus taking support comprises a support and a basket supported on a distal section of an elongated control rod, wherein the support and the basket have an expanded state relative to an initial state, the bracket comprises a bracket body and a hub, wherein the bracket body is in a form of expanding into a cage-shaped structure, the bracket body comprises spokes and bolt cutting ribs, one ends of the spokes are fixedly connected with the hub, and the other ends of the spokes are fixedly connected with the bolt cutting ribs; the hub includes a proximal hub proximate the proximal end of the frame and a distal hub proximate the distal end of the frame; the number of spokes of the proximal hub is less than or equal to the number of spokes of the distal hub; the frame body is used for cutting or scraping attached thrombus on the wall of a blood vessel, the basket comprises ribs and pores, the basket is used for intercepting or catching the free thrombus, the radial supporting force of the frame is larger than the radial supporting force of the basket or the radial supporting force of the frame is larger than the radial supporting force of the basket, compared with the frame, the basket ribs which are flexible and easy to deform can increase friction force and winding force through deformation when contacting the viscous thrombus, the basket also comprises a proximal basket hub which is arranged at the proximal end of the basket and basket spokes, one end of each basket spoke is fixedly connected with the proximal basket hub, the other end of each basket spoke is fixedly connected with the ribs, at least 3 basket spokes are circumferentially arranged at intervals on the proximal basket hub, in an expanded state, the basket has a basket-type cage-shaped space form which extends far away from the proximal basket hub towards the distal end of the thrombus taking frame, has a waveform which is formed in the longitudinal direction, the waveform of the proximal basket hub is taken as a base line, the waveform comprises a peak which is far away from the peak, and a radial supporting force which is close to the peak is larger than the peak, the radial supporting force of the trough is larger than the peak is loaded on the trough, the trough can be subjected to thrombus to get further closer to the baseline.
  3. 3. A thrombus taking support comprises a support and a basket supported on a distal section of an elongated control rod, wherein the support and the basket have an expanded state relative to an initial state, the bracket comprises a bracket body and a hub, wherein the bracket body is in a form of expanding into a cage-shaped structure, the bracket body comprises spokes and bolt cutting ribs, one ends of the spokes are fixedly connected with the hub, and the other ends of the spokes are fixedly connected with the bolt cutting ribs; the hub comprises a proximal hub close to the proximal end of the frame body and a distal hub close to the distal end of the frame body, the basket comprises ribs and pores, the basket is used for intercepting or capturing free thrombus, the radial supporting force of the frame is larger than that of the basket or larger than that of the basket, the frame body comprises a first bracket pore close to the proximal end of the frame body and a second bracket pore close to the distal end of the frame body, the geometric dimension of the first bracket pore is larger than that of the second bracket pore, the basket is deployed at the distal end of the frame and keeps a longitudinal gap with the distal hub of the frame, the flexible and easily deformed basket ribs can increase friction force and winding force through deformation when contacting the viscous thrombus, the basket further comprises a proximal basket hub deployed at the proximal end of the basket and the basket, one end of the basket spokes is fixedly connected with the proximal basket hub, the other end of the basket spokes is fixedly connected with the ribs, the proximal basket hub is circumferentially spaced by at least 3 basket spokes, the basket hub is deployed at the distal end of the basket hub and maintains a longitudinal gap with the distal end of the basket hub, the basket hub is in a wave form, the wave form is formed at the distal end of the proximal end of the basket hub is far from the proximal end of the basket hub, and the basket hub is in a wave form, the wave form is far from the proximal end of the proximal end is formed by the basket hub is in a wave form, and the basket hub is formed by the basket hub is in the basket is in the proximal end, and has a wave form, and has a basket. The radial supporting force of the wave crest is larger than that of the wave trough, and the wave trough can be further close to the base line under the action of thrombus compared with the non-load thrombus state.
  4. 4. A thrombus removal stent according to any one of claims 1 to 3, wherein the defined condition is satisfied when radially compressed to 50% of the expanded state, the radial support force of the stent being 0.005 to 5N/mm and the radial support force of the basket being 0.0005 to 2N/mm.
  5. 5. The thrombus removal stent of claim 4, wherein when radially compressed to 50% of the expanded state, the conditions are met that the radial support force of the stent is less than or equal to 0.01N/mm and less than or equal to 0.2N/mm, and the radial support force of the basket is less than or equal to 0.001N/mm and less than or equal to 0.08N/mm.
  6. 6. The thrombectomy stent of claim 1, wherein the basket further comprises a distal basket hub disposed at a distal end of the basket, and wherein the aperture geometry is greater proximate the proximal basket hub than proximate the distal basket hub.
  7. 7. The thrombus removal stent of claim 1, wherein the basket further comprises a distal basket hub disposed at a distal end of the basket, the basket having a basket-like spatial configuration extending away from the proximal basket hub toward the distal end of the thrombus removal stent in the expanded state, the basket having a filter membrane with a plurality of filter openings disposed thereon.
  8. 8. A thrombus removal stent as in any one of claims 2 to 3 wherein the proximal hub is coaxially attached to the lever and the distal hub is capable of controlled sliding in the longitudinal direction or wherein the distal hub is coaxially attached to the lever and the proximal hub is capable of controlled sliding in the longitudinal direction.
  9. 9. The thrombolytic stent of claim 8, wherein in the expanded state, the stent is capable of forming a cage-like configuration of different diameter dimensions.
  10. 10. A thrombus removal stent according to any one of claims 2 to 3 wherein one spoke is fixedly connected with two or more thrombus removal ribs to form a manifold unit, the manifold unit is provided with a converging part for converging the spokes and the thrombus removal ribs, and a connecting line between a proximal hub and a distal hub is taken as a base line, wherein in a self-expansion state, the distance from the outer contour of the stent to the base line is defined as the self-expansion radius of the stent, and the distance from part of the converging part to the base line is greater than 0.5 times of the self-expansion radius of the stent.
  11. 11. The thrombolytic stent of claim 10, wherein the distance of the partial convergence from the base line is less than or equal to 0.5 times the self-expanding radius of the stent.
  12. 12. A thrombus removal system, comprising the thrombus removal stent of any one of claims 1 to 11, further comprising a suction catheter capable of being connected to a negative pressure source, and a sleeve capable of maintaining the thrombus removal stent in an initial state, wherein the sleeve is sleeved outside the thrombus removal stent, the sleeve extends from the distal end of the thrombus removal stent to the proximal end of a control rod, the sleeve is capable of conveying the thrombus removal stent through a cavity of the suction catheter, and the distal end of the sleeve slides towards the proximal end of the thrombus removal stent, so that the thrombus removal stent can be released into an expanded state.
  13. 13. The thrombi removal system of claim 12, further comprising a steering handle attached near the proximal end of the steering shaft, the steering handle controlling expansion or longitudinal displacement of the thrombi removal stent by pulling wires or rods.
  14. 14. The thrombi removal system of claim 13, wherein the handle comprises a handle housing, a slider and a screw, the handle housing supporting the screw, the slider slidably engaging the screw, the handle housing limiting circumferential rotation of the slider.
  15. 15. The thrombectomy system of claim 12, further comprising a mesh sheath for use with the aspiration catheter and/or an occlusion balloon disposed proximate the distal end of the aspiration catheter.
  16. 16. The thrombi removal system of claim 12, wherein the joystick is a hollow tube and wherein a plurality of through holes are disposed in the wall of the tube proximal to the distal end of the joystick for application of thrombolytic drugs within the lumen of the vessel.

Description

Thrombus taking support and thrombus removing system Technical Field The invention relates to the technical field of medical instruments, in particular to a thrombus taking bracket and a thrombus removing system. Background Peripheral Arterial Disease (PAD) refers to arterial vascular disease located outside the heart or brain, and is mainly plaque of atherosclerosis formed by peripheral blood vessels such as common iliac artery, femoral artery, radial artery, brachial artery, etc., and vascular stenosis is more than 50%. AMI (acute mesenteric ischemia MESENTERIC ISCHEMIA) is called as 'intestinal stroke', has hidden onset, rapid disease development, and frequently inconsistent symptoms and signs, and is extremely easy to misdiagnose, miss diagnosis and have a fatality rate of 20-50%. Peripheral venous diseases are classified into chronic venous insufficiency and venous thromboembolism. Wherein the chronic venous insufficiency mainly comprises venous valve insufficiency, varicose vein and venous thrombosis sequela. Venous thromboembolism mainly includes Deep Vein Thrombosis (DVT) and pulmonary thromboembolism (PE), wherein PE is mainly caused by DVT. The simple thrombolysis anticoagulation and the operation treatment are main methods for treating the acute lower limb deep vein thrombosis, and are replaced by the operation treatment due to the poor anticoagulation effect and high recurrence rate of the simple thrombolysis, so that thrombi removal operations such as catheter contact thrombolysis (CDT), surgical incision thrombolysis, percutaneous Mechanical Thrombolysis (PMT) and the like are developed. The domestic common thrombus removal catheters are mainly Angio Jet. In the prior art, CN201380069871 and CN201310471114 with Medun force describe a self-expanding device with a plurality of grids at the proximal end and the distal end, wherein the distal end is an opening, and is a general treatment structure of a nerve interventional stent, CN202110845847 describes a thrombus removing device with adjustable diameter and length, which comprises a controller, a conveying guide wire and a plurality of cage stent units, the controller is provided with a grasping part and a regulating button arranged in the grasping part, the ball cage units can be uniformly controlled to realize that 1 thrombus removing device meets the requirements of various diameter blood vessels, CN202310700501 describes a double-layer thrombus removing stent, which comprises an outer stent, the proximal end of the outer stent is connected with a pushing tube, the inner side of the distal end of the outer stent is connected with an inner woven microfilter, and the structure can effectively prevent thrombus from escaping, and CN202020677733 describes a thrombus removing assembly and a thrombus removing device for removing the thrombus of the iliac venous embolism. The thrombus taking assembly comprises a thrombus isolation filter screen and a thrombus catching basket which can be radially and elastically expanded and are coaxially arranged, wherein the thrombus isolation filter screen and the thrombus catching basket are fixedly connected, and the thrombus taking assembly can be structurally and effectively taken out. CN202010216583 describes a screen assembly and thrombus aspiration assembly for pulmonary embolism thrombus removal. The filter screen assembly comprises a thrombus breaking filter screen, a first isolation filter screen and a second isolation filter screen, wherein the thrombus breaking filter screen, the first isolation filter screen and the second isolation filter screen are capable of radially and elastically expanding and are coaxially arranged, and the thrombus breaking filter screen is arranged between the first isolation filter screen and the second isolation filter screen. The thrombus sucking component comprises a thrombus sucking tube, a thrombus output tube, a thrombus aspirator and a connecting seat with a hollow channel, and can effectively remove a large thrombus structure. Generally, the existing technologies in the market at present have advantages and disadvantages, such as the Angio Jet uses Bernoulli mode to break and remove the thrombus, the Indigo uses negative pressure to remove the thrombus, flowTriever uses the bracket to remove the thrombus, and various thrombus removing modes have advantages and disadvantages, and the operator can also use various combination modes to remove the thrombus in the clinical process. The invention aims to improve the thrombus taking efficiency, reduce the damage of the blood vessel intima and provide new choices for operators. Disclosure of Invention The invention aims to provide a device for solving the problems in the prior art and improving the thrombus taking efficiency and effect. To achieve the above object, the present invention provides the following. A thrombus taking support comprises a support and a basket supported on a distal end section of an elongated control