CN214908705U - Iliac vein blood vessel support - Google Patents
Iliac vein blood vessel support Download PDFInfo
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- CN214908705U CN214908705U CN202120865433.9U CN202120865433U CN214908705U CN 214908705 U CN214908705 U CN 214908705U CN 202120865433 U CN202120865433 U CN 202120865433U CN 214908705 U CN214908705 U CN 214908705U
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- iliac vein
- net cylinder
- iliac
- vena cava
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Abstract
The application relates to the technical field of blood vessel expansion, and particularly discloses an iliac vein stent which comprises an iliac vein net cylinder, wherein the iliac vein net cylinder sequentially comprises a closed ring section and an open ring section along the axial direction, and the diameter of the iliac vein net cylinder gradually decreases from the closed ring section to the open ring section; the maximum diameter end of the iliac vein net cylinder is connected with a vena cava net cylinder, the diameter of the vena cava net cylinder is larger than the maximum diameter of the iliac vein net cylinder, and a blood flow opening is formed at the connecting end of the vena cava net cylinder and the iliac vein net cylinder. For a patient with proximal iliac vein lesion, the method can solve the problem of smoothness of iliac veins at the lesion part, and does not influence blood backflow of healthy lateral iliac veins; the closed loop section positioned at the pathological change part has stronger supporting force, and the open loop section positioned at the normal blood vessel part is softer, so that the stimulation to the normal blood vessel part is reduced, and the damage to the normal blood vessel part is avoided; the iliac vein net cylinder is a diameter-tapered structure, conforms to the anatomy and physiology of a human body and improves the curative effect.
Description
Technical Field
The application relates to the technical field of vasodilatation, in particular to an iliac vein stent.
Background
Venous vascular disease of the lower extremities is the most common vascular disease in the clinic, for example: lower limb varicose veins, lower body vein thrombosis, lower limb venous valve insufficiency, and the like. One of the main causes of these vascular diseases is venous hypertension of the lower limbs and the obstruction of blood backflow.
The Iliofemoral Vein Compression Syndrome (IVCS) generally refers to a series of clinical symptoms caused by obstruction of venous return due to compression of adjacent tissues, luminal narrowing or occlusion of Iliac veins in a pelvic cavity. Wherein, the lesion part of IVCS is mainly positioned at the opening of common iliac vein, and there is protrusion in the cavity, and it is neither inflammatory nor organized recanalization after thrombus. And the main reason for the occurrence of IVCS is that the left iliac vein is positioned between the right iliac artery crossing the front and the fifth lumbar vertebra protruding from the back, and due to the long-term action and repeated stimulation of the fore-and-aft extrusion phenomenon, the long-term inflammatory reaction around the left iliac vein is caused, the vascular endothelial cells and the middle elastic fiber are proliferated and activated, the intima of the blood vessel is thickened, and finally different degrees of lumen stenosis and occlusion are caused, so that the lower limb venous hypertension can be caused, and then the lower limb venous valve insufficiency, the superficial varicosity and the formation of the iliac-femoral venous thrombosis are easy to occur. Thus, elimination of iliac vein stenosis or occlusion can treat the above-mentioned diseases, as well as avoid the occurrence of the above-mentioned diseases.
The most effective means for treating the iliac vein compression syndrome is to open the iliac vein stenosis or occlusion part and place the iliac vein net cylinder, so that the retraction and reocclusion of the blood vessel after opening can be prevented, the smoothness of the blood vessel cavity is maintained, and the good clinical curative effect is kept. Unfortunately, however, few specialized stents are currently developed for the iliac vein compression syndrome. A good venous stent should have the following characteristics: (1) the positioning is accurate and the release is easy; (2) the biocompatibility is good, and the human body is not damaged; (3) the supporting force is enough, and the blood backflow of the contralateral iliac vein is not influenced; (4) the iliac vein is maintained to be open and thrombus is not easy to generate; (5) restoring iliac vein blood flow status and increasing blood flow; (6) the human anatomy shape and the corresponding physiological characteristics and functions are matched to the maximum extent.
As a vascular surgeon, the fact that no proper iliac vein net cylinder is available in the process of clinically treating iliac vein diseases is often worried, particularly when a diseased region is at the junction of the proximal end of one iliac vein and a vena cava, such as a stent is placed, in order to better cover the diseased region, the proximal end of the stent generally needs to enter the inferior vena cava, in this case, the problem of the iliac vein on the diseased side is solved sometimes, but the stent entering the vena cava possibly blocks the blood backflow of the iliac vein on the healthy side, and a new clinical troublesome problem is generated.
SUMMERY OF THE UTILITY MODEL
The application provides an iliac vein blood vessel support, which is an integrated support system consisting of an iliac vein net cylinder and a vena cava net cylinder for a patient with proximal iliac vein lesion, and can solve the problem of smoothness of iliac veins at the lesion part and avoid influencing blood backflow of healthy lateral iliac veins; the iliac vein net cylinder consists of a closed ring section and an open ring section, the closed ring section positioned at a lesion part has stronger supporting force, and the open ring section positioned at a normal blood vessel part has flexibility and adherence, so that the stimulation to the normal blood vessel part is reduced, and the damage to the normal blood vessel part is avoided; the iliac vein net cylinder is a diameter-tapered structure, conforms to the anatomy and physiology of a human body and improves the curative effect.
In order to achieve the purpose of the invention, the following technical scheme is adopted in the application:
an iliac vein blood vessel support comprises an iliac vein net cylinder, wherein the iliac vein net cylinder sequentially comprises a closed ring section and an open ring section along the axial direction, and the diameter of the iliac vein net cylinder gradually decreases along the direction from the closed ring section to the open ring section;
the maximum diameter end of the iliac vein net cylinder is connected with a vena cava net cylinder, the diameter of the vena cava net cylinder is larger than the maximum diameter of the iliac vein net cylinder, and a blood flow port is formed at the connecting end of the vena cava net cylinder and the iliac vein net cylinder;
the end part of the vena cava net cylinder far away from the iliac vein net cylinder is connected with a supporting piece.
By adopting the technical scheme, for a patient with proximal iliac vein lesion, the integrated bracket system consisting of the iliac vein net barrel and the vena cava net barrel can solve the problem of smoothness of iliac veins at the lesion part and does not influence blood backflow of iliac veins at the healthy side; the iliac vein net cylinder consists of a closed ring section and an open ring section, the closed ring section positioned at the position of a diseased blood vessel has stronger supporting force, and the open ring section positioned at the position of a normal blood vessel is softer, so that the stimulation to the position of the normal blood vessel is reduced, and the damage to the position of the normal blood vessel is avoided; the iliac vein net cylinder is a diameter-tapered structure, conforms to the anatomy and physiology of a human body and improves the curative effect.
Preferably, a first developing marker point is arranged at the joint of the vena cava mesh cylinder and the closed ring segment.
Through adopting above-mentioned technical scheme, the junction of a vena cava net section of thick bamboo and closed loop section adopts first development mark point to carry out the development mark to the position of imbedding of iliac vein blood vessel support of this application of development mark.
Preferably, a second development marking point is arranged at the joint of the closed ring section and the open ring section.
By adopting the technical scheme, the joint of the closed-loop section and the open-loop section is marked by adopting the second developing mark point, so that the closed-loop section is ensured to completely cover the lesion part of the blood vessel.
Preferably, the diameter of the vena cava mesh cylinder in a free expansion state is 280-300mm, and the length of the vena cava mesh cylinder is 200-300 mm; the maximum diameter of the iliac vein net cylinder in a free expansion state is 140-160mm, the minimum diameter is 100-120mm, the length of the closed ring section is 280-320mm, and the length of the open ring section is 200-300 mm.
By adopting the technical scheme, in order to adapt to the anatomical characteristics of the iliac veins of a human body, the diameter of the iliac vein net cylinder is tapered, so that the closed ring section can provide enough supporting force for the wall of the blood vessel, and the iliac vein net cylinder and the iliac vein blood vessel are more attached.
Preferably, the maximum diameter and the minimum diameter of the iliac vein net cylinder are different by 40 mm.
By adopting the technical scheme, the iliac vein net cylinder and the iliac vein blood vessel are more attached to adapt to the anatomical characteristics of the iliac veins of a human body.
Preferably, the included angle between the axial direction of the iliac vein net cylinder and the axial direction of the vena cava net cylinder is 150-180 degrees.
By adopting the technical scheme, the device is suitable for the anatomical characteristics of the connection part of the vena cava and the iliac vein of the human body.
Preferably, the iliac vein stent is formed by laser engraving, weaving or injection molding.
By adopting the technical scheme, the laser engraving support is formed by engraving the medical shape memory cylindrical material by laser, is not contacted with the surface of the material in the laser engraving process, is not influenced by the elasticity and flexibility of the material, and has high processing precision and high speed.
The injection-molded bracket is integrally injection-molded by biomedical shape memory polymer materials, and the mesh shapes of the bracket at the closed ring section and the open ring section of the iliac vein net cylinder and the vena cava net cylinder can respectively and independently select any mesh shape meeting the mesh area requirement of the corresponding bracket in the prior art.
The woven stent is woven by medical shape memory wires, and the iliac vein net cylinder has good flexibility, strong supporting force, good adherence, excellent fatigue resistance and small influence on blood vessels.
In summary, the present application has the following beneficial effects: for a patient with proximal iliac vein lesion, the integrated bracket system consisting of the iliac vein net barrel and the vena cava net barrel can solve the problem of smoothness of iliac veins at a lesion part and does not influence blood backflow of healthy lateral iliac veins; the iliac vein net cylinder consists of a closed ring section and an open ring section, the closed ring section positioned at a lesion part has stronger supporting force, and the open ring section positioned at a normal blood vessel part has flexibility and adherence, so that the stimulation to the normal blood vessel part is reduced, and the damage to the normal blood vessel part is avoided; the iliac vein net cylinder is a diameter-tapered structure, conforms to the anatomy and physiology of a human body and improves the curative effect.
Drawings
FIG. 1 is a schematic structural diagram of an iliac vein stent of an embodiment of the present application;
fig. 2 is a schematic diagram of an iliac vein stent placed in an iliac vessel according to an embodiment of the present disclosure.
In the figure, 1, an iliac vein net cylinder; 11. a closed loop segment; 12. opening a ring section; 2. a vena cava mesh cartridge; 3. a blood flow port; 4. a support member; 5. a first development mark point; 6. and a second development mark point.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
When the following terms are referred to in this application:
(1) the closed loop stent is defined as the stent mesh area < 5.0mm2；
(2) Open-loop stents are defined as stents with a mesh area > 5.0mm2。
The embodiment of the application discloses an iliac vein stent which can be formed by laser engraving, weaving or injection molding.
As shown in fig. 1, the iliac vein stent comprises an iliac vein net cylinder 1, the iliac vein net cylinder 1 sequentially comprises a closed ring section 11 and an open ring section 12 along the axial direction, and the diameter of the iliac vein net cylinder 1 gradually decreases along the direction from the closed ring section 11 to the open ring section 12.
The maximum diameter end of the iliac vein net cylinder 1 is connected with a vena cava net cylinder 2, the diameter of the vena cava net cylinder 2 is larger than the maximum diameter of the iliac vein net cylinder 1, and a blood circulation port 3 used for keeping the vena cava and the iliac vein blood flow on the other side smooth is formed at the connecting end of the vena cava net cylinder 2 and the iliac vein net cylinder 1.
The end of the vena cava mesh cylinder 2 far away from the iliac vein mesh cylinder 1 is connected with a support 4.
The junction of the vena cava net cylinder 2 and the closed ring segment 11 is provided with a first developing mark point 5. The first developing and marking point 5 is used for developing and marking the joint of the vena cava mesh cylinder 2 and the closed loop section 11 so as to develop and mark the implantation position of the iliac vein blood vessel stent.
The joint of the closed ring segment 11 and the open ring segment 12 is provided with a second development marking point 6. The second visualization marking point 6 is used for visualizing and marking the joint of the closed loop segment 11 and the open loop segment 12, so as to ensure that the closed loop segment 11 completely covers the lesion part of the blood vessel.
In order to adapt to the anatomical characteristics of the iliac vein and the vena cava of the human body, the diameter of the vena cava net cylinder 2 in the free expansion state is 300mm and the length is 300 mm; the maximum diameter of the venous net barrel support 1 in the free expansion state is 140-160mm, the minimum diameter is 100-120mm, the length of the closed loop section 11 is 280-320mm, the length of the open loop section 12 is 200-300mm, and the difference between the maximum diameter and the minimum diameter of the iliac venous net barrel 1 is 40 mm.
The implementation principle of the embodiment is as follows: the iliac vein stent is used for iliac vein blood vessel expansion. The vena cava mesh cylinder 2 is placed in the vena cava blood vessel; the iliac vein net cylinder 1 is placed in an iliac vein vessel at one side, a closed loop section at a lesion part has stronger supporting force, an open loop section at a normal vessel part has flexibility and adherence, stimulation to the normal vessel part is reduced, damage to the normal vessel part is avoided, and the iliac vein net cylinder is of a diameter-tapered structure, conforms to anatomy and physiology of a human body, and improves curative effect; the blood flow port 3 is used to keep the blood flow in the vena cava and the iliac vein on the other side open. Therefore, for a patient with proximal iliac vein lesion, the integrated bracket system consisting of the iliac vein net cylinder 1 and the vena cava net cylinder 2 can solve the problem of smoothness of iliac veins at a lesion part and does not influence blood backflow of iliac veins at a healthy side.
The second embodiment of the application also discloses an iliac vein stent, as shown in fig. 2, the second embodiment is different from the first embodiment only in that the included angle between the axial direction of the iliac vein net cylinder 1 and the axial direction of the vena cava net cylinder 2 is 150-180 degrees so as to adapt to the anatomical characteristics of the connection part of the vena cava and the iliac vein of the human body.
The implementation principle of the embodiment is as follows: the same as the first embodiment (see fig. 3).
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The iliac vein blood vessel stent is characterized by comprising an iliac vein net cylinder (1), wherein the iliac vein net cylinder (1) sequentially comprises a closed ring section (11) and an open ring section (12) along the axial direction, and the diameter of the iliac vein net cylinder (1) gradually decreases along the direction from the closed ring section (11) to the open ring section (12);
the maximum diameter end of the iliac vein net barrel (1) is connected with a vena cava net barrel (2), the diameter of the vena cava net barrel (2) is larger than the maximum diameter of the iliac vein net barrel (1), and a blood flow opening (3) is formed at the connecting end of the vena cava net barrel (2) and the iliac vein net barrel (1);
the end part of the vena cava mesh cylinder (2) far away from the iliac vein mesh cylinder (1) is connected with a support part (4).
2. The iliac vein stent as claimed in claim 1, wherein a first visualization mark point (5) is arranged at the connection position of the vena cava mesh cylinder (2) and the closed ring segment (11).
3. The iliac vein stent as claimed in claim 1, wherein a second visualization mark point (6) is arranged at the joint of the closed loop section (11) and the open loop section (12).
4. The iliac vein stent as claimed in claim 1, wherein the vena cava mesh cylinder (2) has a diameter of 280-300mm and a length of 200-300mm in a free expanded state;
the maximum diameter of the iliac vein net cylinder (1) in a free expansion state is 140-.
5. The iliac vein stent as claimed in claim 1, wherein the maximum diameter and the minimum diameter of the iliac vein mesh cylinder (1) are different by 40 mm.
6. The iliac vein stent as claimed in claim 1, wherein the angle between the axial direction of the iliac vein net cylinder (1) and the axial direction of the vena cava net cylinder (2) is 150-180 °.
7. The iliac vein stent as claimed in any one of claims 1 to 6, wherein the iliac vein stent is formed by laser engraving, weaving, or injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120865433.9U CN214908705U (en) | 2021-04-25 | 2021-04-25 | Iliac vein blood vessel support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120865433.9U CN214908705U (en) | 2021-04-25 | 2021-04-25 | Iliac vein blood vessel support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214908705U true CN214908705U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120865433.9U Expired - Fee Related CN214908705U (en) | 2021-04-25 | 2021-04-25 | Iliac vein blood vessel support |
Country Status (1)
| Country | Link |
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| CN (1) | CN214908705U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114533353A (en) * | 2022-01-19 | 2022-05-27 | 四川大学华西医院 | Split type iliac vein stent and placement method thereof |
-
2021
- 2021-04-25 CN CN202120865433.9U patent/CN214908705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114533353A (en) * | 2022-01-19 | 2022-05-27 | 四川大学华西医院 | Split type iliac vein stent and placement method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211130 |