CN104042373B - A kind of recoverable postcava support - Google Patents
A kind of recoverable postcava support Download PDFInfo
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- CN104042373B CN104042373B CN201410262916.4A CN201410262916A CN104042373B CN 104042373 B CN104042373 B CN 104042373B CN 201410262916 A CN201410262916 A CN 201410262916A CN 104042373 B CN104042373 B CN 104042373B
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- connecting rod
- postcava
- endovascular stent
- recoverable
- support
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Abstract
The invention discloses a kind of recoverable postcava support, belong to intervention technical field of medical equipment, comprise connect successively endovascular stent, connecting rod, extension rod and conveying and recovery sheath pipe, wherein, endovascular stent is made up of tinsel, for self-expanding expansion support, length is 60mm-80mm; Tinsel is memorial alloy, and release end is gathered integral, and recovery end endovascular stent diameter is greater than release end diameter, overall in cone structure; Recovery end welds a butt tube, and the other end of butt tube is connected with a connecting rod, and the described connecting rod other end is carved with screw thread, and screw thread is carved with equally in one end of the corresponding connecting rod of extension rod, and mates with the screw thread of connecting rod; The invention provides while guaranteeing endovascular stent support force, can reclaim timely it, avoiding it that situation of restenosis occurs because being placed on Ink vessel transfusing formation thrombosis for a long time and cause blood vessel endothelium hypertrophy, guaranteeing therapeutic effect.
Description
Technical field
The present invention relates to a kind of support, specifically a kind of recoverable postcava support, belongs to intervention technical field of medical equipment.
Background technology
Endovascular stent is a kind of metallicity eyelid retractor be placed in human vas, have and strut narrow blood vessel, ensure the unobstructed effect of regional flow, be used widely (as coronary stent clinically, carotid stents, arteria iliacofemoralis support, postcava support, hepatic vein support, iliac vein support etc.); Endovascular stent once put into internal blood vessel and just cannot take out, but due to endovascular stent be human body foreign body, easily form thrombosis and cause blood vessel endothelium hypertrophy and restenosis occurs for a long time, restenosis, once occur, is difficult to process.
Postcava structure becomes cylindric with type shape, hepatic vein, Accessory hepatic vein and renal veins are opened on postcava right side wall, antetheca and left side wall, hepatic vein crossed over by the postcava support of current use, hepatic vein can be stopped when Accessory hepatic vein and renal veins opening, Accessory hepatic vein or renal veins blood flow, blood vessel endothelium can cause hepatic vein along support growth, the obturation of Accessory hepatic vein or renal veins opening, when postcava support proximal part is close or part stretches into right atrium, because heart is quick, the contraction continued and diastole cause support passive-type to shrink and diastole, within 2 months, can metal fatigue be there is and cause support to rupture and disintegrate, the support disintegrated can enter in ventricle wall or pulmonary artery with blood flow and occur severe complication.Be the foreign body in postcava after postcava stenter to implant, can also thrombosis occur and cause postcava to block again in support on this basis.
Solve postcava topic of corresponding again under normal circumstances and be divided into two kinds, one uses balloon expandable to treat, but because balloon expandable can only keep the squeezing action of several minutes local, sacculus is withdrawn and be there will be elastical retraction by expansion place postcava and cannot reach satisfactory expansion ratio afterwards; Another kind of solution uses 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, while guaranteeing support support force, avoiding it that obstruction of hepatic vein, Accessory hepatic vein or renal veins occurs because being placed on Ink vessel transfusing formation thrombosis for a long time and cause blood vessel endothelium hypertrophy, guaranteeing therapeutic effect.
For achieving the above object, the invention provides a kind of recoverable postcava support, comprise connect successively endovascular stent, butt tube, connecting rod, extension rod and conveying and recovery sheath pipe, conveying and reclaim sheath pipe and comprise inner core and trocar sheath;
Wherein, endovascular stent is woven by memorial alloy and forms, and be self-expanding expansion support, 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 release end diameter, overall in single cone structure;
Recovery end welds a butt tube, 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, screw thread is carved with equally in one end of the corresponding connecting rod of extension rod, and mate with the screw thread of connecting rod, extension rod length is 100cm-140cm.
Further, conveying and recovery sheath length of tube are less than extension rod and connecting rod length sum, are convenient to reclaim and release.
Further, trocar sheath end arranges haemostatic valve, effectively can stop blooding, prevent 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 connection tube and being connected to of extension rod is freed.
Further, butt tube and connecting rod are for 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: when releasing intervene operation, through jugular vein indwelling sheath pipe, seal wire is inserted in postcava, stent delivery sheath pipe is inserted to postcava distal end place along seal wire, exit conveying and reclaim sheath pipe inner core and seal wire, endovascular stent is sent into sheath pipe distal end place through conveying and recovery sheath, according to pre-aligned mark, endovascular stent front end is positioned postcava target spot place, fixed connecting rod and extension rod, retreat conveying and reclaim sheath pipe, after endovascular stent flicks, sheath pipe is exited external, fixed support connecting rod, rotating extension rod makes it depart from connecting rod, the connecting rod of low-necked venous indwelling sheath pipe outside is carried out sterile dressing,
Recovery stage: after endovascular stent places 2-3 a period of time in week in postcava blood vessel, after finding that vessel inner blood circulation is smooth and easy by ultrasound observation, after extension rod is docked with connecting rod, insert conveying through extension rod, connecting rod and jugular vein indwelling sheath pipe and reclaim sheath pipe, conveying and recovery sheath pipe arrive support proximal part, fixing extension rod is also firmly pushed ahead conveying and is reclaimed sheath pipe to support and enters in recovery sheath pipe completely, fixing conveying and recovery sheath pipe, support is withdrawn out conveying and is reclaimed sheath pipe by extension rod of pulling back.
In conjunction with operation principle, the invention provides while guaranteeing endovascular stent support force, can reclaim timely it, avoid it blocks its branch situation because being placed on Ink vessel transfusing formation thrombosis for a long time and cause blood vessel endothelium hypertrophy, ensure that therapeutic effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is in Fig. 1
the schematic enlarged-scale view at place;
Fig. 3 is in Fig. 1
the schematic enlarged-scale view 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 the endovascular stent 1, connecting rod 3, extension rod 4 and the conveying that connect successively and reclaims sheath pipe, conveying and reclaim sheath pipe and comprise inner core 5 and trocar sheath 6;
Wherein, composition graphs 2 and Fig. 3: wherein, endovascular stent 1 is woven by memorial alloy and forms, and be self-expanding expansion support, 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 release end diameter, overall in single cone structure;
Recovery end welds a butt tube 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, screw thread is carved with equally in one end of the corresponding connecting rod 3 of extension rod 4, and mate with the screw thread of connecting rod 3, extension rod 4 length is 100cm-140cm.
Further, conveying and recovery sheath length are less than extension rod 4 and connecting rod 3 length sum, are convenient to conveying and the recovery of endovascular stent 1.
Further, trocar sheath 6 end arranges haemostatic valve 7, effectively can stop blooding, prevent blood back flow.
Preferably, connecting rod 3 and extension rod 4 link are female thread or external screw thread, and extension rod 4 Corresponding matching with it, multiple matching way, guarantees accurate docking.
Preferably, butt tube 2 and connecting rod 3, for being threaded or welding, have multiple connected mode.
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: when releasing intervene operation, through jugular vein indwelling sheath pipe, seal wire is inserted in postcava, stent delivery sheath pipe is inserted to target spot place of postcava distal end place along seal wire, exit conveying and reclaim sheath pipe inner core 5 and seal wire, endovascular stent 1 to sheath pipe distal end place is sent into through conveying and recovery sheath, according to pre-aligned mark, endovascular stent 1 front end is positioned postcava target spot place, fixed connecting rod 3 and extension rod 4, retreat conveying and reclaim sheath pipe, after endovascular stent 1 flicks, conveying and recovery sheath pipe are exited external, fixed support connecting rod 3, rotating 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 sterile dressing,
Recovery stage: after endovascular stent 1 places 2-3 a period of time in week in postcava blood vessel, after finding that vessel inner blood circulation is smooth and easy by ultrasound observation, after extension rod 4 is docked with connecting rod 3, insert conveying through extension rod 4, connecting rod 3 and jugular vein indwelling sheath pipe and reclaim sheath pipe, conveying and recovery sheath pipe arrive endovascular stent 1 proximal part, fixing extension rod 4 is also firmly pushed ahead conveying and is reclaimed sheath pipe to endovascular stent 1 and enters in recovery sheath pipe completely, fixing conveying and recovery sheath pipe, support is withdrawn out conveying and is reclaimed sheath pipe by extension rod 4 of pulling back.。
In conjunction with operation principle, the invention provides while guaranteeing endovascular stent 1 support force, can reclaim timely it, avoid it blocks its branch situation because being placed on Ink vessel transfusing formation thrombosis for a long time and cause blood vessel endothelium hypertrophy, ensure that therapeutic effect, there is higher medical effect and market prospect.
Claims (7)
1. a recoverable postcava support, comprises the endovascular stent (1), connecting rod (3), extension rod (4) and the conveying that connect successively and reclaims sheath pipe, conveying and reclaim sheath pipe and comprise inner core (5) and trocar sheath (6); It is characterized in that,
Wherein, endovascular stent (1) is woven by memorial alloy and forms, and be self-expanding expansion support, 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 release end diameter, overall in single cone structure;
Recovery end welds a butt tube (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, screw thread is carved with equally in one end of extension rod (4) corresponding connecting rod (3), and mate with the screw thread of connecting rod (3), extension rod (4) 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) and extension rod (4) link are female thread or external screw thread, 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) and connecting rod (3) are 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, it 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410262916.4A CN104042373B (en) | 2014-06-13 | 2014-06-13 | A kind of recoverable postcava support |
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| CN104042373A CN104042373A (en) | 2014-09-17 |
| CN104042373B true CN104042373B (en) | 2016-01-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105943213B (en) * | 2015-12-23 | 2019-01-04 | 微创心脉医疗科技（上海）有限公司 | Stent delivery system and its application method |
| 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 |
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| CN102488577A (en) * | 2011-12-14 | 2012-06-13 | 湖南埃普特医疗器械有限公司 | Intravascular guiding wire positioning device and manufacturing method thereof |
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| CN104042373A (en) | 2014-09-17 |
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