CN104042373A - Recoverable inferior vena cava support - Google Patents
Recoverable inferior vena cava support Download PDFInfo
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- CN104042373A CN104042373A CN201410262916.4A CN201410262916A CN104042373A CN 104042373 A CN104042373 A CN 104042373A CN 201410262916 A CN201410262916 A CN 201410262916A CN 104042373 A CN104042373 A CN 104042373A
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- connecting rod
- endovascular stent
- recoverable
- postcava
- support
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Abstract
The invention discloses a recoverable inferior vena cava support, which belongs to the technical field of medical equipment. The recoverable inferior vena cava support comprises an endovascular stent, a connecting rod, an extension rod and a delivery and recycling sheathing canal which are sequentially connected, wherein the endovascular stent is formed by metal wires and is a self-expanding support, the length of the endovascular stent is 60-80mm, the metal wires are memory alloy, the releasing ends of the metal wires are gathered into a whole, the diameter of the recovering end is greater than that of the releasing end, the endovascular stent is integrally of a pyramid structure, the recovering end is welded with a docking pipe, the other end of the docking pipe is connected with the connecting rod, the other end of the connecting rod is engraved with threads, and one end, corresponding to the connecting rod, of the extension rod is also engraved with threads which are matched with the threads of the connecting rod. While supporting force of the endovascular stent is ensured, the endovascular stent can be recovered in time, so that the condition that since the endovascular stent is placed in the blood vessel for a long time, thrombus is formed, and restenosis occurs due to the fact that blood vessel endothelium hyperplasia is caused can be avoided, and the treatment effect is ensured.
Description
Technical field
The present invention relates to a kind of support, specifically a kind of recoverable postcava support, belongs to and gets involved armarium technical field.
Background technology
Endovascular stent is a kind of metallicity eyelid retractor being placed in human vas, there is narrow blood vessel, the unobstructed effect of guarantee regional flow of strutting, be used widely clinically (as coronary stent, carotid stents, arteria iliacofemoralis support, postcava support, hepatic vein support, iliac vein support etc.); Once endovascular stent is put into internal blood vessel and just cannot be taken out, but because endovascular stent is human body foreign body, there is restenosis with causing blood vessel endothelium hypertrophy in the long-time thrombosis that easily forms, once restenosis occurs, is difficult to process.
Postcava structure becomes cylindric with type shape, hepatic vein, secondary hepatic vein and renal veins are opened on postcava right side wall, antetheca and left side wall, the postcava support using is at present crossed over hepatic vein, when secondary hepatic vein and renal veins opening, can stop hepatic vein, secondary hepatic vein or renal veins blood flow, blood vessel endothelium can cause hepatic vein along support growth, the obturation of secondary hepatic vein or renal veins opening, postcava support proximal part near or part while stretching into right atrium, because heart is quick, lasting contraction and diastole cause support passive-type to shrink and diastole, within 2 months, can there is metal fatigue and cause support fracture and disintegrate, the support disintegrating can enter in ventricle wall or pulmonary artery and occur severe complication with blood flow.Postcava support is the foreign body in postcava after implanting, and can also thrombosis occur on this basis and cause postcava to block again in support.
Solve under normal circumstances postcava correspond again topic be divided into two kinds, one is to use balloon expandable to treat, but because balloon expandable can only keep several minutes local squeezing actions, sacculus is withdrawn and be there will be elastical retraction and cannot reach satisfactory expansion ratio by expansion place postcava afterwards; Another kind of solution is to use degradable support, but its material is almag, and support force is less, cannot ensure therapeutic effect.
Summary of the invention
For the problems referred to above, the invention provides a kind of recoverable postcava support, in guaranteeing bracket leg support force, avoid it to form thrombosis and cause that the obstruction of hepatic vein, secondary hepatic vein or renal veins occurs blood vessel endothelium hypertrophy, guarantees therapeutic effect because being placed on for a long time in blood vessel.
For achieving the above object, the invention provides a kind of recoverable postcava support, comprise endovascular stent, butt tube, connecting rod, extension rod and the conveying and the recovery sheath pipe that connect successively, carry and reclaim sheath pipe to comprise inner core and trocar sheath;
Wherein, endovascular stent is made up of memorial alloy braiding, is self-expanding expansion support, and length is 60mm-80mm; Be a wire braiding, main body is straight-tube shape, and release end is gathered integral, and recovery end endovascular stent diameter is greater than to discharge holds diameter, and entirety is single cone structure;
A butt tube of recovery end welding, the other end of butt tube is connected with a connecting rod, the described connecting rod other end is carved with screw thread, connecting rod length is 40cm-60cm, one end of the corresponding connecting rod of extension rod is carved with screw thread equally, and mate with the screw thread of connecting rod, extension rod length is 100cm-140cm.
Further, carry and reclaim sheath length of tube to be less than extension rod and connecting rod length sum, be convenient to reclaim and discharge.
Further, trocar sheath end arranges haemostatic valve, can effectively stop blooding, and prevents blood back flow.
Further, connecting rod and extension rod link are female thread or external screw thread, and extension rod is Corresponding matching with it, and this screw connection structure is convenient to being connected in of connection tube and extension rod and is freed.
Further, butt tube and connecting rod are welding.
Preferably, blood vessel inner bracket material is Ultimum Ti.
Preferably, described diameter wiry is 0.3mm-0.4mm, and endovascular stent diameter is 26mm-30mm.
Operation principle: while releasing intervene operation, through jugular vein indwelling sheath pipe, seal wire is inserted in postcava, insert stent delivery sheath pipe to postcava distal end place along seal wire, exit and carry and reclaim sheath pipe inner core and seal wire, through carrying and reclaiming sheath and send into endovascular stent to sheath pipe distal end place, according to pre-aligned mark, endovascular stent front end is positioned to postcava target spot place, fixed connecting rod and extension rod, retreat and carry and reclaim sheath pipe, after endovascular stent flicks, sheath pipe is exited external, fixed support connecting rod, rotation extension rod makes it depart from connecting rod, the connecting rod of low-necked venous indwelling sheath pipe outside is carried out to sterile dressing,
Recovery stage: endovascular stent was placed after 2-3 a period of time in week in postcava blood vessel, after finding that by ultrasound observation vessel inner blood circulation is smooth and easy, after extension rod is docked with connecting rod, insert and carry and reclaim sheath pipe through extension rod, connecting rod and jugular vein indwelling sheath pipe, carry and reclaim sheath pipe and arrive support proximal part, fixing extension rod is also firmly pushed ahead to carry and reclaim sheath pipe to support and is entered completely in recovery sheath pipe, fixing conveying and recovery sheath pipe, the extension rod of pulling back is withdrawn out support conveying and is reclaimed sheath pipe.
In conjunction with operation principle, the invention provides in guaranteeing endovascular stent support force, can reclaim timely it, avoid it in blood vessel, to form thrombosis and cause that blood vessel endothelium hypertrophy blocks the situation of its branch because being placed on for a long time, guarantee therapeutic effect.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is in Fig. 1
the structure enlarged drawing at place;
Fig. 3 is in Fig. 1
the structure enlarged drawing at place.
In figure: 1, endovascular stent, 2, butt tube, 3, connecting rod, 4, extension rod, 5, inner core, 6, trocar sheath, 7, haemostatic valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, a kind of recoverable postcava support, comprises endovascular stent 1, connecting rod 3, the extension rod 4 connecting successively and carries and reclaim sheath pipe, carries and reclaim sheath pipe to comprise inner core 5 and trocar sheath 6;
Wherein, in conjunction with Fig. 2 and Fig. 3: wherein, endovascular stent 1 is made up of memorial alloy braiding, is self-expanding expansion support, and length is 60mm-80mm, is a wire braiding; Main body is straight-tube shape, and release end is gathered integral, and recovery end endovascular stent 1 diameter is greater than to discharge holds diameter, and entirety is single cone structure;
A butt tube 2 of recovery end welding, the other end of butt tube 2 is connected with a connecting rod 3, described connecting rod 3 other ends are carved with screw thread, connecting rod 3 length are 40cm-60cm, one end of the corresponding connecting rod 3 of extension rod 4 is carved with screw thread equally, and mate with the screw thread of connecting rod 3, extension rod 3 length are 100cm-140cm.
Further, carry and reclaim sheath length to be less than extension rod 4 and connecting rod 3 length sums, be convenient to conveying and the recovery of endovascular stent 1.
Further, trocar sheath 6 ends arrange haemostatic valve 7, can effectively stop blooding, and prevent blood back flow.
Preferably, connecting rod 3 is female thread or external screw thread with extension rod 4 links, extension rod 4 Corresponding matching with it, and multiple matching way, guarantees accurate docking.
Preferably, butt tube 2 for being threaded or welding, has multiple connected mode with connecting rod 3.
Preferably, endovascular stent 1 material is Ultimum Ti, guarantees the support force of endovascular stent.
Preferably, diameter wiry is 0.3mm-0.4mm, and endovascular stent 1 diameter is 26mm-30mm, is applicable to human body postcava, guarantees therapeutic effect.
The release stage: while releasing intervene operation, through jugular vein indwelling sheath pipe, seal wire is inserted in postcava, insert stent delivery sheath pipe to target spot place of postcava distal end place along seal wire, exit and carry and reclaim sheath pipe inner core 5 and seal wire, through carrying and reclaiming sheath and send into endovascular stent 1 to sheath pipe distal end place, according to pre-aligned mark, endovascular stent 1 front end is positioned to postcava target spot place, fixed connecting rod 3 and extension rod 4, retreat and carry and reclaim sheath pipe, after endovascular stent 1 flicks, conveying and recovery sheath pipe are exited external, fixed support connecting rod 3, rotation extension rod 4 makes it depart from connecting rod 3, the connecting rod 3 of low-necked venous indwelling sheath pipe outside is carried out to sterile dressing,
Recovery stage: endovascular stent 1 was placed after 2-3 a period of time in week in postcava blood vessel, after finding that by ultrasound observation vessel inner blood circulation is smooth and easy, after extension rod 4 is docked with connecting rod 3, insert and carry and reclaim sheath pipe through extension rod 4, connecting rod 3 and jugular vein indwelling sheath pipe, carry and reclaim sheath pipe and arrive endovascular stent 1 proximal part, fixing extension rod 4 is also firmly pushed ahead to carry and reclaim sheath pipe to endovascular stent 1 and is entered completely in recovery sheath pipe, fixing conveying and recovery sheath pipe, the extension rod 4 of pulling back is withdrawn out support conveying and is reclaimed sheath pipe.。
In conjunction with operation principle, the invention provides in guaranteeing endovascular stent 1 support force, can reclaim timely it, avoid it in blood vessel, to form thrombosis and cause that blood vessel endothelium hypertrophy blocks the situation of its branch because being placed on for a long time, guarantee therapeutic effect, there is higher medical effect and market prospect.
Claims (7)
1. a recoverable postcava support, comprises endovascular stent (1), connecting rod (3), the extension rod (4) connecting successively and carries and reclaim sheath pipe, carries and reclaim sheath pipe to comprise inner core (5) and trocar sheath (6); It is characterized in that,
Wherein, endovascular stent (1) is made up of memorial alloy braiding, is self-expanding expansion support, and length is 60mm-80mm, is a wire braiding; Main body is straight-tube shape, and release end is gathered integral, and recovery end endovascular stent (1) diameter is greater than to discharge holds diameter, and entirety is single cone structure;
A recovery end butt tube of welding (2), the other end of butt tube (2) is connected with a connecting rod (3), described connecting rod (3) other end is carved with screw thread, connecting rod (3) length is 40cm-60cm, one end of the corresponding connecting rod of extension rod (4) (3) is carved with screw thread equally, and mate with the screw thread of connecting rod (3), extension rod (3) length is 100cm-140cm.
2. a kind of recoverable postcava support according to claim 1, is characterized in that, described conveying and recovery sheath length of tube are less than extension rod (4) and connecting rod (3) length sum.
3. a kind of recoverable postcava support according to claim 1, is characterized in that, described trocar sheath (6) end arranges haemostatic valve (7).
4. a kind of recoverable postcava support according to claim 1 and 2, is characterized in that, described connecting rod (3) is female thread or external screw thread with extension rod (4) link, extension rod (4) Corresponding matching with it.
5. a kind of recoverable postcava support according to claim 1 and 2, is characterized in that, described butt tube (2) with connecting rod (3) for being threaded or welding.
6. a kind of recoverable postcava support according to claim 1, is characterized in that, described endovascular stent (1) material is Ultimum Ti.
7. a kind of recoverable postcava support according to claim 1, is characterized in that, described diameter wiry is 0.3mm-0.4mm, and endovascular stent (1) diameter is 26mm-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410262916.4A CN104042373B (en) | 2014-06-13 | 2014-06-13 | A kind of recoverable postcava support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410262916.4A CN104042373B (en) | 2014-06-13 | 2014-06-13 | A kind of recoverable postcava support |
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| CN104042373A true CN104042373A (en) | 2014-09-17 |
| CN104042373B CN104042373B (en) | 2016-01-27 |
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| CN201410262916.4A Expired - Fee Related CN104042373B (en) | 2014-06-13 | 2014-06-13 | A kind of recoverable postcava support |
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Cited By (2)
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| CN105943211A (en) * | 2015-12-23 | 2016-09-21 | 微创心脉医疗科技（上海）有限公司 | Stent delivering system and back releasing assembly thereof |
| CN105943213A (en) * | 2015-12-23 | 2016-09-21 | 微创心脉医疗科技（上海）有限公司 | Stent delivering system and use method thereof |
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| CN105943213A (en) * | 2015-12-23 | 2016-09-21 | 微创心脉医疗科技（上海）有限公司 | Stent delivering system and use method thereof |
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| CN104042373B (en) | 2016-01-27 |
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