CN102499734A

CN102499734A - Remover for thrombus in stents

Info

Publication number: CN102499734A
Application number: CN2011103654757A
Authority: CN
Inventors: 祖茂衡
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-06-20
Anticipated expiration: 2031-11-17
Also published as: CN102499734B

Abstract

The invention discloses a remover for thrombus in stents, which belongs to the technical field of medical instruments and comprises cutter blades, an axle, a driving device, an elastic filter screen and a guide wire. The cutter blades are arranged at the top end of the axle, the tail end of the axle is mounted in the driving device, the guide wire penetrates through the driving device and the axle, and the elastic filter screen is arranged at the front end of the guide wire. The remover for thrombus in stents has the advantages that by means of percutaneous puncture, the cutter blades in high-speed rotation can remove thrombus in endovascular stents or hyperplastic vascular endothelium thoroughly, the problem of restenosis of the endovascular stents after the endovascular stents are implanted can be solved, and accordingly minimally invasive treatment effect can be achieved and suffering of patients is relieved; besides, the remover is evident in effect and convenient in use.

Description

Thrombosis remover in a kind of support

Technical field

The present invention relates to a kind of medical apparatus and instruments, specifically is thrombosis remover in a kind of support, belongs to the medical apparatus and instruments technical field.

Background technology

Endovascular stent is a kind of metallicity eyelid retractor that is placed in the human vas; Have and strut narrow blood vessel, guarantee the unobstructed effect of regional flow, the endovascular stent technology be used widely clinically (like coronary stent, carotid stents; The arteria iliacofemoralis support; The postcava support, hepatic vein support, iliac vein support etc.).Because endovascular stent is rough, forms thrombosis easily and restenosis takes place with causing the blood vessel endothelium hypertrophy.The processing to the endovascular stent restenosis generally is thrombolytic or uses balloon expandable to treat, and fails thrombosis and outgrowth tissue are removed owing to balloon expandable can only play partial squeezing action, so how undesirable effect is.

Summary of the invention

Problem to above-mentioned prior art existence; The present invention provides thrombosis remover in a kind of support; Can be with thrombosis in the endovascular stent and endotheliosis complete resection, filtered and recycled is excised the thrombosis and the proliferation of vessels endothelial tissue that get off, thereby reaches the purpose of dredging vascellum inner support.

To achieve these goals; The technical scheme that the present invention adopts is: thrombosis remover in a kind of support; Comprise blade cutting knife, wheel shaft, driving device, elasticity drainage screen and seal wire, the blade cutting knife is arranged on axle tip, and the wheel shaft end is installed in the driving device; Seal wire passes driving device and wheel shaft, and the seal wire front end is provided with the elasticity drainage screen.

Further, elasticity drainage screen two ends link to each other with seal wire through adapter.

Further, the blade cutting knife is attached on the wheel shaft when static, opens automatically during rotation and rotary-cut, and the diameter of open diameter of blade cutting knife and endovascular stent is consistent during rotation.

Further, the length of wheel shaft and the catheter length of its coupling adapt, and the diameter of wheel shaft and the catheter diameter of its coupling adapt.

The invention has the beneficial effects as follows: through the percutaneous puncture approach; Utilize the blade cutting knife of high speed rotating can thrombosis in the endovascular stent or proliferation of vessels endothelium thoroughly be removed; Can make the restenosis after endovascular stent is implanted be able to solve, thereby reach the minimally-invasive treatment effect, alleviate patient's misery; Effect is obvious, and is easy to use.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Among the figure: 1, blade cutting knife, 2, wheel shaft, 3, driving device, 4, the elasticity drainage screen, 5, adapter, 6, seal wire.

The specific embodiment

To combine accompanying drawing that the present invention is described further below.

As shown in Figure 1; Thrombosis remover in a kind of support; Comprise blade cutting knife 1, wheel shaft 2, driving device 3, elasticity drainage screen 4 and seal wire 6, blade cutting knife 1 is arranged on wheel shaft 2 tops, and wheel shaft 2 ends are installed in the driving device 3; Seal wire 6 passes driving device 3 and wheel shaft 2, and seal wire 6 front ends are provided with elasticity drainage screen 4; Elasticity drainage screen 4 two ends link to each other with seal wire 6 through adapter 5; Blade cutting knife 1 is attached on the wheel shaft 2 when static; Automatically open and cut during rotation and revolve; It is consistent that the blade cutting knife opens the diameter of 1 diameter and endovascular stent during rotation, and the length of wheel shaft 2 and the catheter length of its coupling adapt, and the diameter of wheel shaft 2 and the catheter diameter of its coupling adapt.

Adapter 5 is nested with and is fixed on the seal wire 6; Elasticity drainage screen 4 is connected fixedly seal wire 6 front ends reserves a segment length with seal wire 6, its hardness is less, produces damage to prevent 6 pairs of blood vessels of seal wire; Rear end hardness is bigger; Can control seal wire 6 and move forward and backward, elasticity drainage screen 4 is fixed on the seal wire 6, and control seal wire 6 moves forward and backward can effectively control elasticity drainage screen 4 in endovascular position.

During treatment, utilize the percutaneous puncture approach, at first with in the conduit intravasation; Through the perspective monitoring tube to endovascular stent in the thrombosis place, this moment elasticity drainage screen 4 is placed the thrombosis far-end, with thrombosis remover in the support by penetrating in the conduit to the thrombosis place; Defecator is positioned in the rack far end blood vessel; Conduit is extracted out, and driving device 3 drives wheel shaft 2 high speed rotating, and wheel shaft 2 driven vane cutting knifes 1 carry out high speed rotating; Blade cutting knife 1 is attached on the wheel shaft when static, and blade cutting knife 1 open diameter can be consistent with the endovascular stent diameter during rotation, because blade cutting knife 1 is in endovascular stent, to rotate; Do not worry blood vessel wall is caused damage, the blade cutting knife 1 during high speed rotating has enough strength with thrombosis and blood vessel endothelium hyperplastic tissue complete resection, and wheel shaft 2 can vertically move in support under rotation status; Reach the effect of cleaning internal stent thrombosis; The wheel shaft 2 of high speed rotating can produce heat with seal wire 6, at this moment can be by liquid such as injection water in the seal wire 6 to reduce heat, and thrombosis after the interior excision and blood vessel hyperplasia endothelium fragment are through front end elasticity drainage screen 4; Seal wire 6 is arranged in the middle of the wheel shaft 2; So seal wire 6 is to be in immobilizedly, elasticity drainage screen 4 is arranged on the seal wire 6, elasticity drainage screen 4 transfixions; Can effectively filter and collect the fragment of excision, not influence the circulation of blood simultaneously.After elasticity drainage screen 4 is full of fragment of tissue, can thrombosis remover integral body be recalled, external elasticity drainage screen 4 inner tissues fragments are removed after, can repeat aforesaid operations once more, thrombosis or hyperplastic tissue's full scale clearance in support.

Because artery blood flow flows to far-end and venous blood flow is back in the pulmonary artery; Thrombosis in the rotary-cut support, must guaranteeing when thrombosis and hyperplastic tissue under the excision and blood vessel endothelium hypertrophy fragment can not blocking remote blood vessel and blood capillary thereof; Through elasticity drainage screen 4 being set at seal wire 6 front ends; Can prevent the clogged with fragments distal vessels and the tissue ischemia of respective regions occurs, thereby guarantee the safety of interventional therapy.

Claims

1. thrombosis remover in the support; It is characterized in that comprising blade cutting knife (1), wheel shaft (2), driving device (3), elasticity drainage screen (4) and seal wire (6); Blade cutting knife (1) is arranged on wheel shaft (2) top; Wheel shaft (2) end is installed in the driving device (3), and seal wire (6) passes driving device (3) and wheel shaft (2), and seal wire (6) front end is provided with elasticity drainage screen (4).

2. thrombosis remover in a kind of support according to claim 1 is characterized in that, described elasticity drainage screen (4) two ends link to each other with seal wire (6) through adapter (5).

3. thrombosis remover in a kind of support according to claim 1; It is characterized in that; Described blade cutting knife (1) is attached to when static on the wheel shaft (2), opens automatically during rotation and rotary-cut, and the diameter of open diameter of blade cutting knife (1) and endovascular stent is consistent during rotation.

4. thrombosis remover in a kind of support according to claim 1 is characterized in that the length of described wheel shaft (2) and the catheter length of its coupling adapt, and the diameter of wheel shaft (2) and the conduit diameter of its coupling adapt.