CN114533353A - Split type iliac vein stent and placement method thereof - Google Patents
Split type iliac vein stent and placement method thereof Download PDFInfo
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- CN114533353A CN114533353A CN202210060690.4A CN202210060690A CN114533353A CN 114533353 A CN114533353 A CN 114533353A CN 202210060690 A CN202210060690 A CN 202210060690A CN 114533353 A CN114533353 A CN 114533353A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
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- Health & Medical Sciences (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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- Heart & Thoracic Surgery (AREA)
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a split type iliac vein stent and a placement method thereof, the split type iliac vein stent comprises a distal segment of a lesion vein and a proximal segment of the lesion vein which are mutually connected and positioned in a lesion vein, and an opposite segment of the lesion vein positioned in another common iliac vein, wherein one end of the distal segment of the lesion vein is provided with a connecting part, a first developing point is arranged on the connecting part, the distal segment of the lesion vein is connected with one end of the opposite segment of the lesion vein through the connecting part, the opposite segment of the lesion vein and the distal segment of the lesion vein form an inverted V shape at the junction position of the two common iliac veins, the lesion vein and the opposite side thereof adopt a split connection mode, so that the stent can be split at the junction position of the left common iliac vein and the right common iliac vein along the blood flowing direction to form a V-shaped structure, the special form matched with the junction position of the left common iliac vein and the right common iliac vein is prevented from shifting, and the stent cannot enter the inferior vena cava, and the mode is convenient for medical staff to position and place and is easy to operate.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a split iliac vein stent and a placement method thereof.
Background
At present, in order to restore the smoothness of the iliac vein, the treatment mode of iliac vein compression syndrome mainly adopts the endovascular interventional therapy operation, which is mainly to implement stent implantation or balloon dilatation at the iliac vein lesion position, is simple, convenient, minimally invasive and high in long-term smoothness rate, and is used in the stent implantation operation; stents are typically hollow or braided tubular structures that can be used for recanalization of pathologically altered hollow organs. The stent in a compressed state can be introduced to a position to be treated through the delivery catheter and expanded by taking certain measures, thereby realizing a supporting effect. Although the types of the blood vessel stents on the market are rich, the blood vessel stents cannot be used in a mutual replacement manner, the diameters, physiological anatomical structures and the like of blood vessels at all parts must be considered, for example, the difference between the physiological forms of veins and arteries is large, the diameters of the veins are smaller than those of the arteries, the bending forms of the blood vessels are more complex, the structures of tissues in the blood vessels are complex, and the requirements on the positioning, the supporting property and the flexibility of the stents are higher, so that the structures of the blood vessel stents are often required to be specifically designed according to application scenes.
According to the anatomical characteristics of inverted Y-shaped iliac veins (bilateral iliac veins are upwards merged into inferior vena cava), the current clinical stents are mainly divided into two types: laser engraving metal stents and metal woven stents. The former can be accurately positioned and placed in the common iliac vein, but lacks flexibility, cannot stride hip joint, and cannot adhere well to the wall. The latter is prone to shortening and poor in support. The most main problems of the existing bracket are as follows: firstly, in the process of implanting the stent in the operation, the placement position of the stent is difficult to determine, the release process of the stent is complex, and the operation difficulty is high; secondly, in order to ensure that the lesion of the common iliac vein is completely covered, the stent needs to be partially released to enter the inferior vena cava, so that the original blood flow direction, the blood flow cavity form and the blood flow field are changed, and the junction of the left common iliac vein and the right common iliac vein after implantation is easy to generate blood flow disturbance or even stagnation, thereby causing the formation of thrombus; and the post-operation bracket may have displacement problem.
In order to solve the above problems, currently, there is proposed a bevel or (semi) horn mouth design for the iliac vein stent to reduce the length of the stent entering the inferior vena cava, however, the uniform bevel angle cannot meet the requirement of all patients on iliac vein morphology. Meanwhile, when the bevel bracket or the (semi) horn-shaped bracket is placed, a method for determining the placing position is not simplified, even the direction of the bevel needs to be additionally considered, the operation difficulty of medical workers is increased, and the problem cannot be fundamentally solved. In addition, there are groups that propose designs of Y-shaped stents to match the special shape of the junction of the left and right common iliac veins and to fix the stent position to avoid displacement. However, the placement method of the Y-shaped stent is much more complex than that of the existing stent, the difficulty of clinical operation is high, and the main stent of the inferior vena cava segment can increase the burden of the vein wall, easily cause damage to the vein wall, and even possibly cause new problems of stent internal leakage and the like. Therefore, it is necessary to provide a new stent design concept for the iliac vein.
Disclosure of Invention
The invention solves the problem of how to obtain a split iliac vein stent which is easy to operate, avoids disturbance and reduces the possibility of stent displacement, and aims to provide a split iliac vein stent and a placement method thereof.
The invention is realized by the following technical scheme:
in one aspect, the invention provides a split type iliac vein stent, the iliac vein comprises two iliac veins, including a lesion vein distal end section and a lesion vein proximal end section which are located in a lesion vein and connected with each other, and a lesion vein opposite section located in the other iliac vein, the lesion vein is one of the two iliac veins, a connecting part is arranged at one end of the lesion vein distal end section, a first developing point is arranged on the connecting part, the lesion vein distal end section is connected with one end of the lesion vein opposite section through the connecting part, and the lesion vein opposite section and the lesion vein distal end section form an inverted V shape at a junction position of the two iliac veins.
The existing support designed according to the Y-shaped structure of the iliac vein needs to be partially released to enter the inferior vena cava, so that the original blood flow direction, the blood flow cavity shape and the blood flow field are changed, blood flow disturbance and even stagnation easily occur at the junction of the left and right common iliac veins after implantation, and thrombus is formed. Therefore, the invention designs the support into three sections, the contralateral section of the lesion vein is placed at the contralateral side of the lesion vein, the distal section of the lesion vein and the proximal section of the lesion vein are placed in the lesion vein, the lesion vein is one of the left and right common iliac veins, because the distal section of the lesion vein and the contralateral section of the lesion vein are connected in a split manner through the connecting part, when the connecting part of the contralateral section of the lesion vein and the distal section of the lesion vein is observed to be positioned at the junction position of the left and right common iliac veins through the first developing point, because the distal section of the lesion vein is positioned in the lesion vein and the contralateral section of the lesion vein is positioned at the other side of the lesion vein, the junction position of the left and right common iliac veins is split into an inverted V-shaped structure at the moment, the inverted Y-shaped feature of the iliac veins is fitted, the support part entering the inferior vena cava is directly omitted, the burden of the vein wall is lightened, and the blood flow disturbance at the junction position of the left and right common iliac veins is avoided, even stagnation, and then lead to the problem of thrombus, carry out position location through first development point, divide the support again and get into in the right and left sides iliac vein, the location is convenient, easily the operation.
Further, the connecting part is any arc of the end part of the distal section of the lesion vein, the arc length of the connecting part is 4-7mm, and a first developing point is arranged at the middle point of the arc length of the connecting part.
Further, the diameter of the lesion vein contralateral section is different from that of the lesion vein distal section, and the lesion vein distal section is connected with the lesion vein contralateral section in a laser welding mode.
Further, be equipped with a plurality of development points on the pathological change vein contralateral section, a plurality of development points include circular hollow development point and circular solid development point, and a plurality of development points distribute respectively in the both ends of pathological change vein contralateral section.
Further, a second developing point is arranged at one end of the lesion vein opposite side section, which is connected with the lesion vein far-end section, along the radial direction opposite to one side of the first developing point, and a third developing point and a fourth developing point are respectively arranged at the other end of the lesion vein opposite side section opposite to the first developing point and the second developing point.
Further, if the first developing point is a circular solid developing point, the second developing point is a circular hollow developing point, and the third developing point and the fourth developing point are circular solid developing points.
Further, the diameter of the opposite section of the lesion vein and the length of the distal section of the lesion vein are both 10-18mm and 20-30 mm.
Further, the side section of the lesion vein and the distal section of the lesion vein are both laser-engraved metal stents, and the laser-engraved metal stents are one or more of 316L stainless steel, platinum-chromium alloy, nickel-titanium alloy, cobalt-chromium alloy, tantalum and titanium.
Further, the diameter of the proximal segment of the lesion vein is 10-18mm, and the proximal segment of the lesion vein adopts a laser engraved metal stent or a degradable stent.
On the other hand, the invention also provides a placement method of the split iliac vein stent, which comprises the split iliac vein stent, and the specific process comprises the following steps:
selecting a split iliac vein stent with the minimum diameter of the stent 2mm larger than the diameter of the diseased iliac vein according to the diameter of the diseased iliac vein of a patient;
compressing each section of the split iliac vein stent, then pre-installing the compressed sections in a stent conveyor, and conveying the split iliac vein stent from a diseased vein to a contralateral vein through the stent conveyor, wherein the diseased vein is a right common iliac artery or a left common iliac vein;
when the contralateral segment of the diseased vein is observed to enter the contralateral vein and the first visualization point is observed proximate to the junction of the left and right common iliac veins, the entire split iliac vein stent is released by the stent transporter.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the split iliac vein stent and the placement method thereof, the split connection design of the opposite section of the diseased vein and the distal section of the diseased vein ensures that the original blood flow direction, blood flow cavity shape and blood flow field are not changed after the stent is placed, and blood flow disturbance (stagnation) and thrombosis can be avoided; developing points are arranged at key positions on the bracket, so that the placement position is easy to determine, the bracket is released along with the flowing direction of blood, the process is simplified, and the operation difficulty is effectively reduced; and the inverted V-shaped structure formed by splitting the opposite side section of the lesion vein and the distal end section of the lesion vein is attached to the Y-shaped structure at the junction of the original iliac veins, the part of the bracket entering the inferior vena cava is few, and the burden of the vein walls of the inferior vena cava and the opposite side vein is small.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of a split iliac vein stent in accordance with one embodiment of the present invention;
FIG. 2 is a schematic diagram of a split iliac vein stent in use according to one embodiment of the present invention;
fig. 3 is an enlarged view of portion a of fig. 2 after anchoring of the split iliac vein stent in place.
FIG. 4 is a schematic structural view of a split iliac vein stent in accordance with another embodiment of the present invention;
reference numbers and corresponding part names in the drawings:
1-lesion vein contralateral segment, 2-lesion vein distal segment, 3-lesion vein proximal segment, 4-left common iliac vein, 5-right common iliac vein, 6-first visualization point, 7-second visualization point, 8-third visualization point, 9-fourth visualization point, 10-fifth visualization point, and 11-split cleft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "distal", "proximal", "left", "right", "upper", "lower", "first, second, third, fourth, fifth", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the 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 scope of the present invention.
Example 1
Diseased veins are mainly due to Iliac Vein Compression Syndrome (IVCS), which is a reflux disorder disease of lower limbs and pelvic veins caused by iliac vein compression and/or the existence of intracavity abnormal adhesion structures. External compression of the vein is often easily caused where the patient's right common iliac artery crosses the left common iliac vein, resulting in occlusion or stenosis of the iliac vein. This compression and intraluminal changes predispose the patient to deep vein thrombosis in the left lower limb. Acute thrombotic patients may cause severe vascular sequelae and chronic left leg symptoms if they are unable to identify and treat the abnormality. The thromboembolism is difficult to recanalize, can cause the reflux disorder of lower limbs and pelvic veins and the venous hypertension of the lower limbs, and is one of the reasons of serious consequences such as the function insufficiency of lower limb venous valves, varicose veins, the formation of iliac-femoral vein thrombosis and the like.
In order to solve the problems occurring in the endovascular interventional therapy, as shown in fig. 1-2, the iliac veins include two iliac veins, a left iliac vein 4 and a right iliac vein 5, the lesion vein below is represented as one of the two common iliac veins, and the opposite side of the lesion vein represents the other of the two common iliac veins, and this embodiment 1 provides a split type iliac vein stent comprising a lesion vein distal section 2 and a lesion vein proximal section 3 connected to each other in the lesion vein, and a lesion vein opposite section 1 positioned at the other common iliac vein, wherein one end of the lesion vein distal section 2 is provided with a connecting part, a first developing point 6 is arranged on the connecting part, the lesion vein distal section 2 is connected with one end of the lesion vein opposite section 1 through the connecting part, and the lesion vein opposite section 1 and the lesion vein distal section 2 form an inverted V-shape at the position where the two common iliac veins meet.
Specifically, the lesion vein opposite side section 1 and the lesion vein distal end section 2 are both laser-engraved metal stents, the laser-engraved metal stents are one or more of 316L stainless steel, platinum-chromium alloy, nickel-titanium alloy, cobalt-chromium alloy, tantalum and titanium, the lesion vein proximal end section 3 adopts a laser-engraved metal stent or a degradable stent, the degradable stent is an absorbable metal-based material and/or a polymer type absorbable material, and the absorbable metal-based material is one or more of magnesium base, iron base and zinc base alloy; the polymer absorbable material is one or more of polylactic acid, polycaprolactone and polycarbonate, the diameters of the lesion vein opposite side section 1 and the lesion vein distal end section 2 are both 10-18mm, and the lengths of the lesion vein opposite side section and the lesion vein distal end section are both 20-30 mm. The diameter of the lesion vein proximal section 3 is 10-18mm, the lesion vein proximal section 3 adopts a laser engraving metal stent, a woven stent, a degradable stent or an existing iliac vein stent on the market, and when the degradable stent is made of a metal-based material, the stents adopted by the sections are connected by laser welding; when the degradable stent is made of polymer absorbable materials, the stents adopted by each section are connected by weaving.
Be equipped with a plurality of development points on pathological change vein contralateral section 1, a plurality of development points include circular hollow development point and circular solid development point, and a plurality of development points distribute respectively in the both ends of pathological change vein contralateral section 1. Specifically, three developing points are arranged on the lesion vein opposite side section 1, wherein a first developing point 6 is arranged on the connecting portion, a second developing point 7 is arranged on one side of the connecting portion of the lesion vein opposite side section 1 and the lesion vein distal end section 2, which is opposite to the connecting portion of the lesion vein opposite side section 1 and the lesion vein distal end section 2 (at a split opening 11), and a third developing point 8 and a fourth developing point 9 are respectively arranged on the other end of the lesion vein opposite side section 1, which is opposite to the first developing point 6 and the second developing point 7. If the first developing dots 6 are circular solid developing dots, the second developing dots 7 are circular hollow developing dots, and the third developing dots 8 and the fourth developing dots 9 are circular solid developing dots. The developing mark used in the developing point is made of a non-transillumination material, such as a metal or alloy material of gold, platinum, tantalum, or a non-transillumination polymer material.
Example 2
The difference between the embodiment 2 and the embodiment 1 lies in that a split iliac vein stent comprises a distal segment 2 of the lesion vein and a proximal segment 3 of the lesion vein which are mutually connected and a distal segment 1 of the lesion vein which is located in the other common iliac vein, the distal segment 1 of the lesion vein and the distal segment 2 of the lesion vein can be divided by one stent, the division is not completely broken to form a split 11, the connection is formed at the place which is not broken, and the connection is any arc on the distal segment 2 of the lesion vein or the distal segment 1 of the lesion vein, the arc length of the connection is 4-7mm (or about 1/8-1/6 of the circumference of the cross section of the distal segment 2 of the lesion vein), and the middle point of the arc length of the connection is provided with a first developing point 6. The lesion vein opposite section 1 and the lesion vein distal section 2 form an inverted V-shape at the location where the two common iliac veins meet.
As shown in fig. 4, in the present embodiment, the opposite lesion vein side segment 1 and the distal lesion vein segment 2 both adopt laser-engraved metal stents, that is, one laser-engraved metal stent is not completely broken and split into two segments, and the diameters of the opposite lesion vein side segment 1 and the distal lesion vein segment 2 are both 12mm and the lengths thereof are 25 mm. And the material of the laser engraving metal bracket can be one or more of 316L stainless steel, platinum-chromium alloy, nickel-titanium alloy, cobalt-chromium alloy, tantalum and titanium. The lesion vein proximal section 3 is a braided stent, and the diameter of the lesion vein proximal section 3 is 15mm, and the length of the lesion vein proximal section is 30 mm. The lesion vein distal section 2 and the lesion vein proximal section 3 are connected in a braided manner.
Three developing points are arranged on the lesion vein opposite side section 1, the first developing point 6 is a circular solid developing point, a circular hollow second developing point 7 is arranged on the opposite side of the first developing point 6 (namely, the break of the split 11 of the lesion vein opposite side section 1), a circular hollow fifth developing point 10 is arranged on the lesion vein far side section 2 opposite to the second developing point 7, a third developing point 8 and a fourth developing point 9 are respectively arranged at one end of the lesion vein opposite side section 1 far from the split 11 and opposite to the first developing point 6 and the second developing point 7, and the developing points are tungsten developing points.
Example 3
This example 3 differs from example 1 in that the split iliac vein stent of this example comprises a distal segment 2 and a proximal segment 3 of the lesion vein which are connected to each other in the lesion vein, and an opposite segment 1 of the lesion vein in the other common iliac vein, the lesion vein being one of the two common iliac veins. In the present embodiment, the diameters of the lesion vein contralateral segment 1 and the lesion vein distal segment 2 may be different, and the adjustment manner is determined according to the specific situation of the patient; for example, the lesion vein opposite section 1 has a diameter of 12mm and a length of 25mm, and the lesion vein distal section 2 has a diameter of 15mm and a length of 20 mm; the proximal segment 3 of the lesion vein has a diameter of 15mm and a length of 30 mm. The connecting mode of the lesion vein opposite side section 1 and the lesion vein distal end section 2 is laser welding, and the lesion vein opposite side section 1 and the lesion vein distal end section 2 are not completely welded, the welding part forms the connecting part, the arc length of the welding part is 4-7mm (or is about 1/8-1/6 of the circumference of the cross section of the end of the lesion vein distal end section 2), and a round solid developing point is arranged at the middle point of the arc length of the connecting part. Due to incomplete welding, the lesion vein opposite side section 1 and the lesion vein distal end section 2 can be split at the junction position of the two common iliac veins to form a split 11, so that an inverted V shape is formed at the junction position of the two common iliac veins, the anatomical characteristics of the junction position of the left common iliac veins and the right common iliac veins are met, the original blood flow direction, the original blood flow cavity shape and the original blood flow field are not changed, and blood flow disturbance (stagnation) and thrombosis are avoided.
In the embodiment, when the whole split type iliac vein stent is naturally unfolded, the opposite section 1 of the lesion vein is anchored on the wall of the opposite side vein, the proximal section 3 and the distal section of the lesion vein are respectively anchored at the near end and the distal end of the lesion vein, and the opposite section 1 and the distal section 2 of the lesion vein are anchored at the junction position of the left common iliac vein and the right common iliac vein, so that the split type iliac vein stent not only conforms to the anatomical structure of the veins, but also can be effectively anchored on the wall of the blood vessel after the stent is implanted, and the iliac vein stent is prevented from sliding down to the inferior vena cava due to the pulsation of the iliac arteries. The developing mark is made of a non-transillumination material, such as a metal or alloy material of gold, platinum, tantalum, etc., or a non-transillumination polymer material.
Example 4
Based on the above examples 1, 2, 3, the specific procedure for the implantation of the split iliac vein stent is as follows:
selecting a split iliac vein stent with the minimum diameter of the stent 2mm larger than the diameter of the lesion iliac vein of a patient according to the diameter of the lesion iliac vein of the patient;
compressing each section of the split iliac vein stent, then pre-installing the compressed split iliac vein stent in a stent conveyor, conveying the split iliac vein stent from a lesion vein to a contralateral vein through the stent conveyor, wherein the lesion vein is a right common iliac artery or a left common iliac vein 4; as shown in fig. 2, when the lesion vein is the right common iliac vein 5, the contralateral vein is the left common iliac vein 4, and the stent is delivered from the right common iliac vein 5 to the left common iliac vein 4;
when the contralateral segment 1 of the diseased vein is observed to enter the contralateral vein (i.e. whether two solid visualization points of circle are observed to enter the contralateral vein along the radial direction of the stent) and the first visualization point 6 is observed to be proximate to the junction of the left and right common iliac veins, the entire split iliac vein stent is released by the stent conveyor.
Specifically, as shown in fig. 3, after the developing position (i.e., the first developing point 6) at the connection between the lesion vein opposite side section 1 and the lesion vein distal end section 2 reaches the junction position of the two iliac veins on the left and right sides, it is confirmed that the first developing point 6 is close to the junction position of the two iliac veins on the left and right sides, and the two circular hollow developing points (the second developing point 7 and the fifth developing point 10) face the splitting opening 11, the entire stent is released directly, at this time, the splitting opening 11 at which the lesion vein opposite side section 1 is connected with the lesion vein distal end section 2 is automatically opened along with the release of the stent, the connection between the lesion vein opposite side section 1 and the lesion vein distal end section 2 can automatically fit the junction position of the two iliac veins on the left and right sides, and the three-section stent self-expandable fits the blood vessel wall, thereby supporting and fixing the iliac veins, and completing the entire stent implantation process.
It can be understood that the split connection design of the invention ensures that the original blood flow direction, blood flow cavity shape and blood flow field are not changed after the stent is placed, and can avoid blood flow disturbance (stagnation) and thrombosis; developing points are arranged at key positions on the bracket, so that the placement position is easy to determine, the bracket is released along with the flowing direction of blood, the process is simplified, and the operation difficulty is effectively reduced;
the determination of the confluence position of the left and right iliac veins and the connection of the contralateral venous stent and the distal stent of the lesion vein can reduce the displacement risk of the lesion venous stent after operation; the inverted V-shaped structure formed by splitting the opposite side section of the lesion vein and the distal end section of the lesion vein is attached to the Y-shaped structure at the junction of the original iliac veins, the part of the bracket entering the inferior vena cava is few, and the burden of the vein walls of the inferior vena cava and the opposite side vein is small.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A split iliac vein support comprises two iliac veins, and is characterized by comprising a distal end section (2) of the iliac vein and a proximal end section (3) of the iliac vein which are positioned in a lesion vein and connected with each other, wherein the lesion vein is one of the two iliac veins, and a contralateral section (1) of the lesion vein is positioned in the other iliac vein, one end of the distal end section (2) of the lesion vein is provided with a connecting part, a first developing point (6) is arranged on the connecting part, the distal end section (2) of the lesion vein is connected with one end of the contralateral section (1) of the lesion vein through the connecting part, and the contralateral section (1) of the lesion vein and the distal end section (2) of the lesion vein form an inverted V shape at the junction position of the two iliac veins.
2. The split iliac vein stent of claim 1, wherein the connecting part is any arc of the end of the distal segment (2) of the lesion vein, the arc length of the connecting part is 4-7mm, and a first visualization point (6) is arranged at the middle point of the arc length of the connecting part.
3. The split iliac vein stent of claim 1, wherein the diameter of the lesion vein opposite section (1) is different from that of the lesion vein distal section (2), and the lesion vein distal section (2) is connected with the lesion vein opposite section (1) by laser welding.
4. The split iliac vein stent of claim 1, wherein a plurality of visualization points are disposed on the opposite section (1) of the diseased vein, the plurality of visualization points comprise a circular hollow visualization point and a circular solid visualization point, and the plurality of visualization points are respectively distributed at two ends of the opposite section (1) of the diseased vein.
5. A split iliac vein stent according to claim 4, wherein a second visualization point (7) is provided at one end of the lesion vein opposite section (1) connected to the lesion vein distal section (2) along a radial direction on a side opposite to the first visualization point (6), and a third visualization point (8) and a fourth visualization point (9) are provided at the other end of the lesion vein opposite section (1) opposite to the first visualization point (6) and the second visualization point (7), respectively.
6. A split iliac vein stent according to claim 5, wherein if said first visualization point (6) is a round solid visualization point, then the second visualization point (7) is a round hollow visualization point, and the third visualization point (8) and the fourth visualization point (9) are round solid visualization points.
7. A split iliac vein stent according to claim 1, wherein the lesion vein contralateral segment (1) and lesion vein distal segment (2) are each 10-18mm in diameter and 20-30mm in length.
8. The split iliac vein stent of claim 1, wherein the lesion vein contralateral segment (1) and the lesion vein distal segment (2) are both laser-engraved metal stents, said laser-engraved metal stents being one or more of 316L stainless steel, platinum-chromium alloy, nickel-titanium alloy, cobalt-chromium alloy, tantalum and titanium.
9. The split iliac vein stent as claimed in claim 1, wherein the diameter of the proximal segment (3) of the lesion vein is 10-18mm, and the proximal segment (3) of the lesion vein is laser-engraved with a metal stent or a degradable stent.
10. A method for placing a split iliac vein stent, which comprises the split iliac vein stent of any one of claims 1 to 9, and comprises the following steps:
selecting a split iliac vein stent with the minimum diameter of the stent 2mm larger than the diameter of the lesion iliac vein of a patient according to the diameter of the lesion iliac vein of the patient;
compressing each section of the split iliac vein stent, then pre-installing the compressed sections in a stent conveyor, and conveying the split iliac vein stent from a diseased vein to a contralateral vein through the stent conveyor, wherein the diseased vein is a right common iliac artery or a left common iliac vein (4);
when the contralateral segment (1) of the diseased vein is observed to enter the contralateral vein and the first visualization point (6) is observed to be proximate to the junction of the left and right common iliac veins, the entire split iliac vein stent is released by the stent transporter.
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| CN201312846Y (en) * | 2008-12-22 | 2009-09-23 | 李家一 | Integrated V-type bracket of bifurcation blood vessel |
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| CN212547267U (en) * | 2020-03-20 | 2021-02-19 | 贾伟 | Iliac vein support |
| CN214908705U (en) * | 2021-04-25 | 2021-11-30 | 张福先 | Iliac vein blood vessel support |
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| CN201312846Y (en) * | 2008-12-22 | 2009-09-23 | 李家一 | Integrated V-type bracket of bifurcation blood vessel |
| CN108938160A (en) * | 2017-11-17 | 2018-12-07 | 杭州唯强医疗科技有限公司 | Bracket for nearly bifurcation lesion |
| CN111096832A (en) * | 2018-12-19 | 2020-05-05 | 上海善迪医疗科技有限公司 | Blood vessel expansion support |
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