CN114305590B - Far-end protector - Google Patents
Far-end protector Download PDFInfo
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- CN114305590B CN114305590B CN202210254800.0A CN202210254800A CN114305590B CN 114305590 B CN114305590 B CN 114305590B CN 202210254800 A CN202210254800 A CN 202210254800A CN 114305590 B CN114305590 B CN 114305590B
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- catheter
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- guide wire
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Abstract
The invention provides a far-end protector, relating to the technical field of medical equipment, comprising: a protective umbrella component, a guide wire component and a delivery catheter component; the guide wire component is detachably inserted into the protective umbrella component; the conveying catheter component is sleeved on the guide wire component and is used for sleeving the protective umbrella component so as to enable the protective umbrella component to radially contract. The far-end protector provided by the invention can be smoothly conveyed to a blood vessel target position, and can realize an independent guide wire pilot-in technology.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a far-end protector.
Background
When peripheral angiosclerosis obliteration lesion is treated, no matter a catheter suction technology or a plaque rotary cutting technology is adopted, calcified plaques in an arterial lumen can be broken in a thrombus removing process, the broken plaques are easy to block a distal arterial blood vessel, and the risk that the distal tissue is necrotic even amputates due to blood non-circulation is caused. The distal protector for the peripheral blood vessel can be used for avoiding distal embolism in the interventional embolectomy process, however, the distal protector in the prior art is mostly difficult to realize the independent guide wire pilot-in technology. Although a few distal end protectors can realize independent guide wire pilot feeding technology, the guide wires cannot be replaced, the hardness of the guide wires is fixed, and the independent guide wires with different hardness cannot be selected according to the position of lesion. In addition, the transportation performance of the protective umbrella of the distal protector becomes poor after the protective umbrella enters the human body, so that the distal protector is difficult to reach the lesion site.
Disclosure of Invention
The invention aims to provide a far-end protector which can be smoothly conveyed to a blood vessel target position and can realize an independent guide wire pilot-in technology.
In a first aspect, the present invention provides a distal protector comprising: a protective umbrella assembly, a guidewire assembly and a delivery catheter assembly;
the guide wire assembly is detachably inserted into the protective umbrella assembly;
the conveying catheter component is sleeved on the guide wire component and is used for sleeving the protective umbrella component so as to enable the protective umbrella component to radially contract.
With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the protective umbrella assembly includes: umbrella core pipe, protective umbrella frame and filter membrane;
the protection umbrella framework is arranged on the umbrella core pipe, the filter membrane is coated on the protection umbrella framework, and the filter membrane is surrounded to form a filter cavity.
With reference to the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the protective umbrella frame includes: the support frame, the annular part, a plurality of near-end hacks and a plurality of far-end hacks;
the plurality of distal frame rods are arranged at intervals along the circumference of the annular part and are respectively connected to the annular part;
the plurality of far-end hack levers are respectively connected to one side of the support frame, and the plurality of near-end hack levers are respectively connected to the other side of the support frame;
the plurality of near-end frame rods are respectively connected to the umbrella core pipe, and the filter membrane is coated outside the plurality of far-end frame rods.
In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the distal frame rod comprises: a first inclined plane section, a straight section and a second inclined plane section;
the support frame, the first inclined plane section, the straight section and the second inclined plane section are sequentially connected;
under the natural resilience state of the support frame, the first inclined surface section and the second inclined surface section incline towards the axis direction close to the annular part respectively from one end close to the support frame to one end far away from the support frame.
With reference to the first possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein a first developing ring is installed at one end of the protection umbrella framework, a second developing ring is installed at the other end of the protection umbrella framework, a third developing ring is installed on the protection umbrella framework, and the third developing ring is located at an opening of the filter cavity.
In combination with the first possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the core tube is provided with a spiral slit, and the outside of the core tube is provided with a polymer layer.
With reference to the first aspect, the present disclosure provides a sixth possible implementation manner of the first aspect, wherein the guide wire assembly includes: the device comprises a winding wire, a guide wire plug, a rear-end core wire and a one-way hoop;
the wire winding, the guide wire plug and the rear-end core wire are sequentially connected, and the one-way hoop is arranged on the guide wire plug;
the rear core wire and the one-way hoop are respectively inserted into the delivery catheter component.
With reference to the sixth possible implementation manner of the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein the guide wire plug is provided with an eccentric hole, and an axis of the eccentric hole is parallel to and spaced from an axis of the guide wire plug;
the rear core wire is connected in the eccentric hole.
With reference to the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the delivery catheter assembly includes: the catheter comprises a catheter inner tube and a catheter outer tube, wherein the catheter inner tube is inserted into the catheter outer tube;
the guide wire assembly is inserted into the inner catheter tube, and the outer catheter tube is used for sleeving the protective umbrella assembly.
With reference to the eighth possible implementation manner of the first aspect, the present invention provides a ninth possible implementation manner of the first aspect, wherein the catheter outer tube comprises: the outer tube body and the catheter umbrella bin;
the outer tube body is coaxially connected with the catheter umbrella bin, and the diameter of the catheter umbrella bin is larger than that of the outer tube body;
the outer tube body is sleeved on the catheter inner tube, and the catheter umbrella bin is used for sleeving the protection umbrella assembly.
The embodiment of the invention has the following beneficial effects: adopt seal wire subassembly detachably to insert and locate in the protection umbrella subassembly, the conveying catheter subassembly cover is established on the seal wire subassembly, establishes the protection umbrella subassembly through conveying catheter subassembly cover to make the radial shrink of protection umbrella subassembly, can ensure that the distal end protector can reach the blood vessel target location smoothly, and can realize independent seal wire guide and go into the technique.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a distal protector provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a protective umbrella assembly of the distal protector provided in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a protective umbrella assembly of the distal protector provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of a protective umbrella frame of the distal protector according to the embodiment of the present invention;
FIG. 5 is a schematic view of a core tube of the distal protector provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic view of a guidewire assembly of the distal protector provided by an embodiment of the present invention;
fig. 7 is a schematic view of a guidewire choke plug of the distal protector provided by an embodiment of the present invention;
FIG. 8 is a schematic view of a delivery catheter assembly of the distal protector provided by an embodiment of the present invention;
FIG. 9 is a partial cross-sectional view of a delivery catheter assembly of the distal protector provided in accordance with an embodiment of the present invention;
fig. 10 is a partial cross-sectional view of an umbrella core tube and delivery catheter assembly of the distal end protector provided by an embodiment of the present invention.
Icon: 100-a protective umbrella assembly; 110-umbrella core tube; 111-spiral slitting; 120-protection umbrella framework; 121-a support frame; 122-an annular portion; 123-proximal frame bar; 124-distal frame bar; 1241-a first ramp section; 1242-straight section; 1243-a second slope section; 130-filtration membrane; 131-a filter chamber; 140-a first developer ring; 150-a second developer ring; 160-third developer ring; 200-a guidewire assembly; 210-filament winding; 220-guide wire plug; 221-eccentric hole; 230-rear core wire; 240-one-way hoop; 300-a delivery catheter assembly; 310-a catheter inner tube; 320-a catheter outer tube; 321-an outer tube body; 322-catheter umbrella chamber.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The physical quantities in the formula, if not individually labeled, are to be understood as basic quantities of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation or integration.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the distal end protector provided by the embodiment of the present invention includes: umbrella assembly 100, guidewire assembly 200, and delivery catheter assembly 300; guide wire assembly 200 is removably inserted into umbrella assembly 100; the delivery catheter assembly 300 is sleeved on the guide wire assembly 200, and the delivery catheter assembly 300 is used for sleeving the umbrella assembly 100 so as to radially contract the umbrella assembly 100.
The protective umbrella assembly 100 is sleeved on the conveying catheter assembly 300, so that the sleeved protective umbrella assembly 100 can be contracted into the conveying catheter assembly 300, and the distal protector can smoothly reach the lesion position under the condition that the protective umbrella assembly 100 is radially contracted. In addition, the guide wire assembly 200 can be inserted into the protection umbrella assembly 100, and the protection umbrella assembly 100 is guided to move to the lesion position by the guide wire assembly 200. Moreover, the guide wire assembly 200 can be detached, so that the guide wire assembly 200 meeting the hardness requirement can be selected according to the requirements of the lesion position.
As shown in fig. 1, 2 and 3, in an embodiment of the present invention, an umbrella assembly 100 includes: an umbrella core tube 110, a protective umbrella framework 120 and a filter membrane 130; the protection umbrella frame 120 is installed on the umbrella core tube 110, the filter membrane 130 is covered on the protection umbrella frame 120, and the filter membrane 130 is surrounded to form a filter cavity 131.
Specifically, the filter membrane 130 is wrapped on the protective umbrella frame 120 to form an umbrella-shaped structure, the filter membrane 130 has a function of intercepting thrombus, and the protective umbrella frame 120 can be made of nickel-titanium alloy material and is polished.
As shown in fig. 2 and 4, the protective umbrella frame 120 includes: a support frame 121, a ring portion 122, a plurality of proximal frame bars 123 and a plurality of distal frame bars 124; a plurality of distal frame bars 124 are arranged along the circumference of the annular portion 122 at intervals, and the plurality of distal frame bars 124 are respectively connected to the annular portion 122; the plurality of distal frame bars 124 are respectively connected to one side of the supporting frame 121, and the plurality of proximal frame bars 123 are respectively connected to the other side of the supporting frame 121; the proximal frame rods 123 are connected to the umbrella core tube 110, and the filter membrane 130 is covered outside the distal frame rods 124.
Specifically, a plurality of proximal frame bars 123 are respectively connected to the core tube 110, so that the ends of the proximal frame bars 123 are fixed with respect to the core tube 110. When the protective umbrella frame 120 is radially contracted or resiliently expanded, the annular portion 122 slides in the axial direction of the core tube 110. It should be noted that, in the rebound state, the support frame 121 forms a plurality of V-shaped structures around the circumference of the umbrella core tube 110; when the protective umbrella frame 120 is radially compressed, the included angle of the V-shaped structure is reduced, thereby achieving radial contraction of the protective umbrella frame 120.
Further, the distal frame bar 124 includes: a first sloped section 1241, a straight section 1242 and a second sloped section 1243; the supporting frame 121, the first inclined plane section 1241, the straight section 1242 and the second inclined plane section 1243 are connected in sequence; in the natural resilient state of the support frame 121, the first slope section 1241 and the second slope section 1243 are respectively inclined toward the axial direction of the annular portion 122 from the end close to the support frame 121 to the end far from the support frame 121.
Under the rebound expansion state, the included angle between the first inclined plane section 1241 and the axis of the umbrella core tube 110 is a first included angle, the included angle between the second inclined plane section 1243 and the axis of the umbrella core tube 110 is a second included angle, the first included angle is smaller than the second included angle, and the straight section 1242 and the axis of the umbrella core tube 110 approach to be parallel, so that the amount of thrombus effectively intercepted by the protection umbrella assembly 100 is larger.
Further, a first developing ring 140 is installed at one end of the protective umbrella frame 120, a second developing ring 150 is installed at the other end of the protective umbrella frame 120, a third developing ring 160 is installed on the protective umbrella frame 120, and the third developing ring 160 is located at the opening of the filter chamber 131.
Specifically, the first developing ring 140 is mounted at an end of the proximal frame rod 123 away from the supporting frame 121, and the first developing ring 140 is sleeved on the umbrella core tube 110; the second developing ring 150 is sleeved on the annular portion 122, and the second developing ring 150, the annular portion 122 and the umbrella core tube 110 are coaxial. The third developing ring 160 is provided in plurality, and the plurality of third developing rings 160 are mounted on the plurality of proximal frame bars 123 in a one-to-one correspondence.
As shown in fig. 2 and 5, the core tube 110 is provided with a spiral slit 111, and a polymer layer is provided outside the core tube 110.
Specifically, the umbrella core tube 110 is provided with the spiral slits 111, thereby ensuring that the umbrella core tube 110 has good bending performance. The polymer layer is coated on the outer surface of the umbrella core tube 110, and body fluid or blood can be prevented from entering the umbrella core tube 110 by the polymer layer. Moreover, the annular portion 122 is sleeved on the umbrella core tube 110, and the surface of the polymer layer is smooth, so that the annular portion 122 can smoothly slide on the umbrella core tube 110, and further radial contraction and rebound expansion of the protective umbrella framework 120 are realized.
As shown in fig. 1, 2, 6 and 7, the guidewire assembly 200 includes: a winding wire 210, a guide wire plug 220, a rear core wire 230 and a one-way hoop 240; the winding wire 210, the guide wire plug 220 and the rear core wire 230 are connected in sequence, and the one-way hoop 240 is arranged on the guide wire plug 220; the rear core wire 230 and the one-way clamp 240 are respectively inserted into the delivery catheter assembly 300.
Specifically, the teeth of the one-way clip 240 are tapered to diverge away from the axis of the guide wire plug 220 and toward the rear core wire 230. The guide wire assembly 200 may be passed through the core tube 110 during which the plurality of teeth of the one-way clamp 240 are radially compressed so that the one-way clamp 240 can pass smoothly through the core tube 110.
Further, the guide wire plug 220 is provided with an eccentric hole 221, and the axis of the eccentric hole 221 is parallel to the axis of the guide wire plug 220 and is arranged at intervals; the rear core wire 230 is connected in the eccentric hole 221. When the rear core wire 230 is pulled, the rear core wire 230 is axially deviated from the guide wire plug 220, so that the guide wire plug 220 can more accurately clamp the distal end of the protective umbrella assembly 100, in other words, the guide wire plug 220 can more easily clamp the end of the umbrella core tube 110, thereby facilitating the recovery operation of the protective umbrella assembly 100.
As shown in fig. 1, 2, 8, 9 and 10, the delivery catheter assembly 300 includes: a catheter inner tube 310 and a catheter outer tube 320, the catheter inner tube 310 being inserted into the catheter outer tube 320; the guide wire assembly 200 is inserted into the inner catheter tube 310, and the outer catheter tube 320 is used for sheathing the umbrella assembly 100.
When the fixed catheter inner tube 310 is not moved, the catheter outer tube 320 is pulled so that the umbrella assembly 100 is released from the catheter outer tube 320, and the released umbrella assembly 100 automatically expands radially under the elastic force. When the umbrella assembly 100 needs to be accommodated, the umbrella assembly 100 is sleeved by the outer conduit tube 320, and the outer conduit tube 320 can extrude the umbrella assembly 100 to radially contract.
It should be noted that the outer diameter of the umbrella core tube 110 is larger than the inner diameter of the catheter inner tube 310, the inner diameter of the umbrella core tube 110 is smaller than the outer diameter of the catheter inner tube 310, and when the protection umbrella assembly 100 is released, the catheter inner tube 310 abuts against the umbrella core tube 110, so that the protection umbrella assembly 100 is fixed with respect to the catheter inner tube 310, and the catheter outer tube 320 is pulled, so that the catheter outer tube 320 moves axially with respect to the protection umbrella assembly 100, and the protection umbrella assembly 100 is released.
Further, the catheter outer tube 320 includes: an outer tube body 321 and a catheter umbrella chamber 322; the outer tube body 321 is coaxially connected with the catheter umbrella chamber 322, and the diameter of the catheter umbrella chamber 322 is larger than that of the outer tube body 321; the outer tube body 321 is sleeved on the catheter inner tube 310, and the catheter umbrella chamber 322 is used for sleeving the protective umbrella assembly 100.
Specifically, the outer tube body 321 is sleeved on the catheter inner tube 310, and the outer tube body 321 is matched with the catheter inner tube 310, so that the outer tube body 321 can slide along the axial direction relative to the catheter inner tube 310. Catheter umbrella cartridge 322 is slightly larger in diameter to accommodate radially collapsed umbrella assembly 100.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A distal protector, comprising: a protective umbrella assembly (100), a guide wire assembly (200), and a delivery catheter assembly (300);
the guide wire assembly (200) is detachably inserted into the protective umbrella assembly (100);
the delivery catheter component (300) is sleeved on the guide wire component (200), and the delivery catheter component (300) is used for sleeving the protective umbrella component (100) so as to enable the protective umbrella component (100) to radially contract;
the guidewire assembly (200) includes: the device comprises a wire winding (210), a guide wire plug (220), a rear core wire (230) and a one-way hoop (240);
the wire winding (210), the guide wire plug (220) and the rear core wire (230) are sequentially connected, and the one-way hoop (240) is installed on the guide wire plug (220);
the rear core wire (230) and the one-way clamp (240) are respectively inserted into the delivery catheter component (300);
the delivery catheter assembly (300) comprises: a catheter inner tube (310) and a catheter outer tube (320), the catheter inner tube (310) being inserted within the catheter outer tube (320);
the guide wire assembly (200) is inserted into the catheter inner tube (310), and the catheter outer tube (320) is used for sleeving the protective umbrella assembly (100).
2. The distal protector of claim 1, where the protective umbrella assembly (100) comprises: an umbrella core pipe (110), a protective umbrella framework (120) and a filter membrane (130);
the protection umbrella framework (120) is arranged on the umbrella core pipe (110), the filter membrane (130) is coated on the protection umbrella framework (120), and the filter membrane (130) is surrounded to form a filter cavity (131).
3. The distal protector of claim 2, wherein the protective umbrella frame (120) comprises: a support frame (121), a ring-shaped part (122), a plurality of proximal frame rods (123) and a plurality of distal frame rods (124);
the plurality of distal frame rods (124) are arranged at intervals along the circumference of the annular part (122), and the plurality of distal frame rods (124) are respectively connected to the annular part (122);
the plurality of the far end hacks (124) are respectively connected to one side of the support frame (121), and the plurality of the near end hacks (123) are respectively connected to the other side of the support frame (121);
the plurality of proximal frame rods (123) are respectively connected to the umbrella core tube (110), and the filter membrane (130) is coated outside the plurality of distal frame rods (124).
4. The distal protector of claim 3, wherein the distal hanger bar (124) comprises: a first inclined plane section (1241), a straight section (1242) and a second inclined plane section (1243);
the support frame (121), the first inclined plane section (1241), the straight section (1242) and the second inclined plane section (1243) are connected in sequence;
in a natural rebound state of the support frame (121), the first slope section (1241) and the second slope section (1243) are inclined in an axial direction approaching the annular portion (122) from an end close to the support frame (121) to an end far from the support frame (121).
5. The distal end protector according to claim 2, wherein a first developing ring (140) is installed at one end of the protection umbrella frame (120), a second developing ring (150) is installed at the other end of the protection umbrella frame (120), a third developing ring (160) is installed on the protection umbrella frame (120), and the third developing ring (160) is located at an opening of the filter chamber (131).
6. The distal protector of claim 2, wherein the umbrella core tube (110) is provided with a spiral slit (111) and the outside of the umbrella core tube (110) is provided with a polymer layer.
7. The distal protector of claim 1, wherein the guide wire plug (220) is provided with an eccentric hole (221), and an axis of the eccentric hole (221) is parallel to and spaced from an axis of the guide wire plug (220);
the rear core wire (230) is connected in the eccentric hole (221).
8. The distal protector of claim 1, wherein the catheter outer tube (320) comprises: an outer tube body (321) and a catheter umbrella chamber (322);
the outer tube body (321) is coaxially connected with the catheter umbrella bin (322), and the diameter of the catheter umbrella bin (322) is larger than that of the outer tube body (321);
the outer tube body (321) is sleeved on the catheter inner tube (310), and the catheter umbrella bin (322) is used for sleeving the protective umbrella assembly (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210254800.0A CN114305590B (en) | 2022-03-16 | 2022-03-16 | Far-end protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210254800.0A CN114305590B (en) | 2022-03-16 | 2022-03-16 | Far-end protector |
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| CN114305590A CN114305590A (en) | 2022-04-12 |
| CN114305590B true CN114305590B (en) | 2022-06-21 |
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| CN202210254800.0A Active CN114305590B (en) | 2022-03-16 | 2022-03-16 | Far-end protector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114916994B (en) * | 2022-07-22 | 2022-11-01 | 北京华脉泰科医疗器械股份有限公司 | Nidus extractor |
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| CN111281487A (en) * | 2020-03-19 | 2020-06-16 | 南京普微森医疗科技有限公司 | Cerebral nerve and blood vessel thrombus removing device |
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| CN201595959U (en) * | 2010-02-09 | 2010-10-06 | 北京泰杰伟业科技有限公司 | Embolism protector for protecting blood vessels of brain |
| CN107874870A (en) * | 2016-09-30 | 2018-04-06 | 苏州茵络医疗器械有限公司 | Sacculus umbrella external member |
| US11197750B2 (en) * | 2016-11-29 | 2021-12-14 | Lake Region Manufacturing, Inc. | Embolic protection device |
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| EP3745970B1 (en) * | 2018-03-06 | 2023-08-23 | Viant AS&O Holdings, LLC | Expandable reamer cutting head |
| CN112690872B (en) * | 2020-12-29 | 2022-05-31 | 上海璞慧医疗器械有限公司 | Thrombectomy support |
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| CN112773459A (en) * | 2021-02-04 | 2021-05-11 | 北京华脉泰科医疗器械有限公司 | Thrombolytic catheter device with protective structure |
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| CN111281487A (en) * | 2020-03-19 | 2020-06-16 | 南京普微森医疗科技有限公司 | Cerebral nerve and blood vessel thrombus removing device |
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| CN114305590A (en) | 2022-04-12 |
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