CN101961274A - Blood vessel necking device and controlled release system - Google Patents
Blood vessel necking device and controlled release system Download PDFInfo
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- CN101961274A CN101961274A CN2010105217670A CN201010521767A CN101961274A CN 101961274 A CN101961274 A CN 101961274A CN 2010105217670 A CN2010105217670 A CN 2010105217670A CN 201010521767 A CN201010521767 A CN 201010521767A CN 101961274 A CN101961274 A CN 101961274A
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Abstract
The invention relates to a blood vessel necking device, which comprises a retractable multilayer netlike bracket. The bracket is provided with a near end and a remote end; the innermost layer of the bracket is provided with a pipe orifice facing the near end of the bracket; the outermost layer of the bracket is provided with a pipe orifice facing the remote end of the bracket; a transition section is arranged between the innermost layer and the outermost layer and comprises a conical tube structure, a corrugated tube structure, a multilayer folding structure or the combination of the three structures; and the transition section is provided with a first end close to the near end of the bracket and a second end close to the remote end of the bracket, the first end is close to the innermost layer of the bracket, the second end is close to the outermost layer of the bracket, and the internal diameter of the first end is smaller than the external diameter of the second end. The invention also relates to a controlled release system. The blood vessel necking device repairs the pulmonary valve subjected to hemangiectasis by a minimally invasive intervention method, does not depend on surgical operation any more and reduces the trauma of patients and the risk of the operation.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, relate in particular to a kind of intraluminal blood vessel reduced mouth part of pulmonary artery blood and controllable release system of can be used for.
Background technology
The Fa Shi tetra logy is a kind of clinically more common cyanosis type congenital heart disease, accounts for 10%-15%.Be modal a kind of cyanosis type congenital heart disease among the survival baby, accounted for 70% in the later cyanosis type congenital heart disease at 1 years old.Typical Fa Shi tetra logy comprises stenosis of pulmonary artery, ventricular septal defect, aortic overriding, right ventricle plumpness, and wherein stenosis of pulmonary artery is a topmost pathological changes in the Fa Shi tetra logy, also is the key factor that influences primary disease Pathophysiology and clinical manifestation.
For the infant patient mainly is to adopt the staging operation treatment, at first carries out palliative operation, mainly is to increase the pulmonary circulation blood flow amount, improves cardio-pulmonary function, carries out radical operation at last.After one-stage operation was finished, a lot of patient's valve of pulmonary trunk can be expanded, and still can produce blood reflux after the closure.Needing to recover the function of valve of pulmonary trunk herein in the secondary operation, generally is to adopt surgical operation therapy at present.But adopt twice surgical operation can increase risk to patient.
Adopt the percutaneous intervening mode to repair valve of pulmonary trunk, can significantly less wound to patient, shorten recovery period, thereby significantly reduce operation risk.The technology that gets involved valve of pulmonary trunk now is ripe relatively, has obtained using widely on market.But the diameter of getting involved valve of pulmonary trunk at present is all smaller, generally is no more than 22 millimeters, can not fix at the valve of pulmonary trunk place behind the Fa Shi tetra logy patient one-stage operation usually.Therefore pulmonary artery intervention lobe technology can't be used in the patient behind the Fa Shi tetra logy one-stage operation at present.
At the situation of valve of pulmonary trunk expansion behind the Fa Shi tetra logy patient one-stage operation, big inadequately because of getting involved valve diameter, can't adopt the intervention valve replacement usually, can only adopt the method for surgical repair to treat.Surgical operation is big to patient's wound, also patient bear surgical operation continuously twice, bigger to patient's risk.Except patient behind the Fa Shi tetra logy one-stage operation, also have some other patients with congenital heart need replace valve of pulmonary trunk, diameter is a lot of if the pulmonary artery oral area also surpasses the intervention valve of pulmonary trunk, and the latter can not be suitable for interventional therapy so.Therefore, need the existing interventional therapeutic technique of development,, also adopt intervening mode to replace valve of pulmonary trunk smoothly, to reduce Fa Shi tetra logy patient and other patients' treatment risk for the bigger situation of pulmonary artery oral area diameter.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of blood vessel reduced mouth part and controllable release system, can not repair valve of pulmonary trunk by the mode that gets involved to solve in the prior art, can only adopt the method for surgical repair to treat, and then patient's wound increased, to patient's problems such as surgical risk increase.
Solving the technical scheme that technical problem of the present invention adopts is: a kind of blood vessel reduced mouth part, it comprises a contractile multiwalled network, described support has a near-end and a far-end, the innermost layer of described support has the near-end of a mouth of pipe towards described support, the outermost layer of described support is provided with the far-end of a mouth of pipe towards described support, be provided with a changeover portion between described innermost layer and the outermost layer, described changeover portion comprises the conical tube structure, bellows structure, multilayer folding structure or three kinds of structures that structure makes up mutually, described changeover portion is provided with second end near the far-end of first end of the near-end of described support and close described support, described first end is near the innermost layer of described support, described second end is near the outermost layer of described support, and the internal diameter of described first end is less than the external diameter of second end.
As the further improvement of blood vessel reduced mouth part of the present invention, further comprise the choked flow film that is arranged on the described changeover portion, the zone that described choked flow film is set comprises first end and second end of described changeover portion.
As the further improvement of blood vessel reduced mouth part of the present invention, the material of described choked flow film is PET or e-PTFE material.
As the further improvement of blood vessel reduced mouth part of the present invention, spur the mouth of pipe of innermost layer of described support and the outermost mouth of pipe of described support, described support becomes the monolayer tubulose.
As the further improvement of blood vessel reduced mouth part of the present invention, the innermost layer mouth of pipe edge of described support is provided with connecting hole.
As the further improvement of blood vessel reduced mouth part of the present invention, described support is to make with single or many one metal wires, and perhaps described support is to form with the thin metallic tubd engraving.
As the further improvement of blood vessel reduced mouth part of the present invention, the material of described tinsel or metal tube is a Nitinol.
As the further improvement of blood vessel reduced mouth part of the present invention, be positioned at tinsel on the outermost layer of far-end and draw in and be fixed on some nodes, the wire end of described each node is welded into a ball, described ball is evenly distributed on outermost mouth of pipe place.
And, solving another technical scheme that technical problem of the present invention adopts is: a kind of controllable release system that is used to carry and discharge the blood vessel reduced mouth part, comprise drag-line, the sheath pipe, and push rod, the inner chamber that between the near-end of sheath pipe and far-end, has perforation, drag-line and push rod all pass the inner chamber of described sheath pipe, described drag-line, push rod is relative with sheath Guan Douke to slide, described controllable release system has feed status and release conditions, it is characterized in that: described blood vessel reduced mouth part is provided with a near-end, in described feed status, described blood vessel reduced mouth part is straightened and is in the described sheath pipe, and described drag-line is connected with the near-end of described blood vessel reduced mouth part, and the far-end of described push rod contacts the near-end of described blood vessel reduced mouth part; In described release conditions, push rod is slided to sheath pipe far-end, far-end with described blood vessel reduced mouth part discharges from the sheath pipe earlier, relative motion by push rod and sheath pipe, control blood vessel reduced mouth part is by length of releasing from the sheath pipe and speed, near-end until the blood vessel reduced mouth part is released, and drag-line is thrown off from the near-end of described blood vessel reduced mouth part again; Described controllable release system also has the recovery state, before described blood vessel reduced mouth part breaks away from the sheath pipe fully, tightens drag-line and pulls back toward the near-end of sheath pipe, reduced mouth part is shunk and recalls in the sheath pipe.
Compared with prior art, the present invention possesses following advantage: 1, the blood vessel reduced mouth part of the present invention structure that is a kind of contractile multilayer folding, can it be trailed by external force, and be retracted in the delivery sheath, this structure Design can be retracted to it in smaller sheath pipe of diameter, has reduced the wound to the patient vessel.2, the innermost layer of blood vessel reduced mouth part of the present invention and outermost layer all are pipes, changeover portion between the ectonexine is conical tube or corrugated tube, changeover portion is close to the tube wall of ectonexine, and be integral network structure, improved mechanical stability, enough strong support force can be provided, both help secure valve, also can prevent the reduced mouth part displacement.3, the two ends of reduced mouth part of the present invention are fixed with the choked flow film, can prevent that blood is from the leakage of valve periphery.4, controllable release of the present invention system can get involved the lobe technology in conjunction with application with pulmonary artery, realized utilizing the valve of pulmonary trunk behind the mode Xiu Fufashi tetra logy patient one-stage operation that conduit gets involved, avoided secondary surgical repair to the patient, reduced wound to patient, shorten operating time, simplified operation technique.5, the blood vessel reduced mouth part among the present invention has been realized controllable release in patient's body, can locate repeatedly.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the sketch map of blood vessel reduced mouth part first embodiment of the present invention;
Fig. 2 is the sketch map of the support in blood vessel reduced mouth part first embodiment of the present invention;
Fig. 3 is the sketch map of the choked flow film in blood vessel reduced mouth part first embodiment of the present invention;
Fig. 4 is the sketch map of the backguy in blood vessel reduced mouth part first embodiment of the present invention;
Fig. 5 is the sketch map before support in blood vessel reduced mouth part first embodiment of the present invention formalizes with heat treatment after braiding;
Fig. 6 is the sketch map of the controllable release system of blood vessel reduced mouth part of the present invention;
Fig. 7 is the sketch map of blood vessel reduced mouth part second embodiment of the present invention;
Fig. 8 is the sketch map before support in blood vessel reduced mouth part second embodiment of the present invention formalizes with heat treatment after braiding;
Fig. 9 is the sketch map of blood vessel reduced mouth part the 3rd embodiment of the present invention;
Figure 10 is the sketch map of blood vessel reduced mouth part the 4th embodiment of the present invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The support of the blood vessel reduced mouth part among the present invention can be made with metal materials such as rustless steel, cochromes, preferably adopts super-elastic shape memory alloy material NiTi to make.Support can form with single or many titanium-nickel wire braidings, and also available NiTi pipe laser engraving forms.With the Nitinol is example, and the basic process of making this metal rack is as follows: at first, make the netted straight tube shape support of closed loop with titanium-nickel wire or NiTi control, and then utilize mould this straight tube shape support heat treatment to be shaped as the support of a multilayer folding.Nickel-titanium alloy material is because the super-elastic shape memory characteristic of himself, can guarantee that this support can trail it by external force, and be retracted to one, and can also automatically revert to initial multilayer folding state after from delivery sheath, discharging than in the also little delivery sheath of innermost layer diameter.
Below in conjunction with accompanying drawing and a plurality of specific embodiment the present invention is described in further details.
Embodiment one
As shown in Figures 1 to 4, blood vessel reduced mouth part embodiment one of the present invention is a controllable release reduced mouth part, and it is made of following components: three layers of support 100 that folding titanium-nickel wire braiding forms, as shown in Figure 2; Choked flow film 200, as shown in Figure 3; And optionally backguy 300, as shown in Figure 4.Support 100 in the present embodiment one adopts 30 titanium-nickel wire braiding setting to form, and has successive latticed surface.This support 100 has a near-end 1 and a far-end 2, and the edge of the far-end 2 of this support 100 is positioned at the outermost layer 3 of support 100, and the edge of the near-end 1 of this support 100 is positioned at the innermost layer 5 of this support 100.Edge at near-end 1 has titanium-nickel wire to weave the connecting hole 101 that forms, and all can be out of shape under external force, and all be closed.This connecting hole 101 is distributed on three different circumference around the axis of support 100, and the axial distance between these connecting hole 101 residing circumference is suitable with the support size of mesh opening, and outermost connecting hole 101 is suitable for controllable release most.The titanium-nickel wire end of the far-end 2 of this support 100 is woven together in pairs, and each end to titanium-nickel wire is welded into little ball, scatters to prevent rack far end, avoids damaging tissue.The outermost layer 3 of this support 100 is connected with first end 6 of changeover portion 4 by near-end, and the innermost layer 5 of changeover portion 4 and this support 100 is connected by second end 7 of far-end.This outermost layer 3 and innermost layer 5 are the straight tube shape, these changeover portion 4 approximate circle Taper Pipes.This innermost layer 5 is close to the near-end of changeover portion 4, and outermost layer 3 is close to the far-end of changeover portion 4, and their first ends 6 by near-end and second end 7 of far-end constitute an integral body, and this structure can strengthen radial support power, better fixedly reduced mouth part and valve.In order to make three layers of folding rack 100 as shown in Figure 2, can be woven into tubular reticulum with 30 titanium-nickel wires earlier, be shaped as straight tube shape support as shown in Figure 5 again, utilize mold hot to handle then and be shaped to three layers of folding support 100 by the titanium-nickel wire braiding.Utilize weaving of the prior art, also available single titanium-nickel wire braided support does not need the titanium-nickel wire of welding support far-end, and heat treatment process is identical.
On folding support 100, cover the choked flow film, one group of choked flow film 200 is fixed on position on the support 100 as shown in Figure 1 by suture.Available two rings shape choked flow film 200 constitutes one group, and the cross sectional shape that covers the choked flow film 200 on the support 100 as shown in Figure 3.Two choked flow films 200 are coated on second end, 7 outsides of the inboard and far-end of first end 6 in the form of a ring of near-end respectively, can stop blood flow to flow through between the outermost layer 3 of this support 100 and innermost layer 5.The internal diameter of this first end 6 is less than the external diameter (internal diameter of this first end 6 is meant the beeline of first end 6 from the axis of tubulose innermost layer 5, and in like manner, the external diameter of this second end 7 is meant the ultimate range of second end 7 from the axis of tubulose innermost layer 5) of second end 7.For support 100 is inserted in the delivery sheath, to be drawn into straight tube shape to support 100 earlier, at this moment two choked flow films 200 all still remain on this support 100 inside, are shunk the sheath pipe smoothly to guarantee entire bracket 100.Choked flow membrane material in the embodiment of the invention adopts the material with good biocompatibility, as PET, e-PTFE, or derivatives thereof etc.Backguy 300 shown in Figure 4 can be used the polypropylene line, passes the connecting hole 101 of near-end 1 outermost of support 100, as shown in Figure 1.According to the needs of doctor operation, backguy 300 can be two ends freely, also available closed line as shown in Figure 4.For the backguy 300 of closure, can drag-line cooperation of reuse finish the controllable release operation.
Figure 6 shows that the major part of the controllable release system among the present invention, promptly the used conveyer device of blood vessel reduced mouth part is made up of vessel dilator 8, sheath core 9, drag-line 10, sheath pipe 11, push rod 12, sheath pipe handle 13, pusher grip 14.Vessel dilator 8 links together with sheath core 9, push rod 12 is in the inner chamber of the perforation of sheath pipe 11, sheath core 9 and drag-line 10 all pass through from the endoporus of push rod 12, have locking device 16 push rod 12 can be pinned on the sheath pipe handle 13, have locking device 17 sheath core 9 can be pinned on the pusher grip 14.Drag-line 10 can directly pass the connecting hole 101 of reduced mouth part innermost layer 5 near-ends.Closed backguy 300 on the reduced mouth part shown in Figure 4 can link together with drag-line 10, by pulling force reduced mouth part is retracted in the epitheca pipe 11, and the near-end 1 of reduced mouth part contacts with the far-end of push rod 12, and the thrust by push rod 12 during release discharges it.
In feed status, drag-line 10 far-ends pass some connecting holes 101 at the most close reduced mouth part near-end 1 mouth of pipe edge in turn, and reduced mouth part is drawn as straight tube and is compressed near the far-end of income sheath pipe 11 inner chambers, and push rod 12 far-ends withstand reduced mouth part near-end 1.During appointed part, at first be that the reduced mouth part far-end is discharged from delivery sheath 11 in sheath pipe 11 far-ends arrive human body, near-end is released at last.By the relative motion of drag-line 10, push rod 12 and sheath pipe 11, can accurately control the release length and the speed of reduced mouth part.Make push rod 12 relative sheath pipes 11 to far-end slip certain-length, one section reduced mouth part of respective length can be released sheath pipe 11 and the reinstatement of expanding.Before reduced mouth part all leaves sheath pipe 11, tighten drag-line 10 and pull back toward near-end, reduced mouth part can be recalled in the sheath pipe 11, can discharge again again to far-end pusher 12 again.Repeatable operation can be discharged into reduced mouth part desired location and return to the multilayer folding state, drag-line 10 can be extracted out from connecting hole 101 at last.If reduced mouth part is provided with backguy 300 by above method, then drag-line 10 needn't pass connector 101, just can realize same function as long as pass backguy 300.
Blood vessel reduced mouth part in the present embodiment one and controllable release system can make and assembling by following basic step:
The braiding of employing titanium-nickel wire by the heat treatment setting, is made the network of a straight pipe type, and support has a near-end and a far-end, and the near-end junction point is divided into three layers in the axial direction, and each junction point place is provided with a connecting hole;
Utilize mould to heat-treat, the network of this straight pipe type is shaped as three layers of folding support, its outermost layer and innermost layer all are straight tube shape, successive changeover portion is arranged between outermost layer and the innermost layer, the outermost layer opening is towards rack far end, outermost layer is connected with first end of changeover portion by near-end, and the innermost layer opening is towards mount proximal end, and innermost layer is connected with second end of changeover portion by far-end;
Make the choked flow membrane support of reduced mouth part, sew up the annular choked flow film of a slice respectively outside second end of and far-end inboard at first end of the near-end of these three layers of folding racks;
The one group connecting hole of this choked flow membrane support innermost layer at the mount proximal end edge passed in backguy;
The conveyer device that assembling one cover is made up of vessel dilator, sheath pipe, push rod, sheath core, drag-line, sheath pipe handle, pusher grip;
This reduced mouth part is retracted in the sheath pipe of this conveyer device, forms the controllable release system.
Embodiment two
As shown in Figure 7, embodiment one difference of second embodiment of blood vessel reduced mouth part of the present invention and blood vessel reduced mouth part is: metal rack 18 adopts NiTi pipe laser engraving to form in the blood vessel reduced mouth part shown in Figure 7.At first utilize NiTi pipe laser engraving and be shaped as straight tube shape support shown in Figure 8, support 18 has mount proximal end 19 and rack far end 20, be shaped as three layers of folding support shown in Figure 7 by mould then, the rack space structure is identical with rack space structure shown in Figure 2.In mount proximal end connecting hole is set also, passes, to realize the controllable release of blood vessel reduced mouth part for backguy 300 or drag-line 10.After the blood vessel reduced mouth part was discharged fully, its near-end connecting hole can be freed with backguy 300 or drag-line 10.
Embodiment three
As shown in Figure 9, the difference of the 3rd embodiment of blood vessel reduced mouth part of the present invention and embodiment one is: three layers of folding rack shown in Figure 9 have corrugated changeover portion.When heat treatment setting support, die surface is made corrugated, just can realize.The trough 21,23 of corrugated changeover portion contacts with the support innermost layer, and crest 22,24 contacts with the support outermost layer, and trough 21 is at the near-end of changeover portion, and crest 24 is at the far-end of changeover portion.This corrugated changeover portion can make the support force between support innermost layer and the outermost layer more even, makes the structure of reduced mouth part more stable.
Embodiment four
As shown in figure 10, the 4th embodiment of blood vessel reduced mouth part of the present invention and the difference of embodiment one are: three layers of folding rack shown in Figure 10 have the changeover portion of multilayer folding, further the support force between reinforced support innermost layer and the outermost layer.Can select the folding number of plies of changeover portion according to the size and the mechanics requirement of blood vessel reduced mouth part, generally can back and forth fold three times or five times.Add upper bracket innermost layer and outermost layer, have the reduced mouth part of this multilayer folding changeover portion, just comprise multilayer folding support (above three layers).The inner edge 25,27,29 of multilayer folding changeover portion contacts with the support innermost layer, and its outer rim 26,28,30 contacts with the support outermost layer, and the inner edge 25 of changeover portion is at its near-end, and the outer rim 30 of changeover portion is at its far-end.When carrying out the support heat treatment, can divide several times changeover portion is formalized, finish a foldable layer at every turn, and all use corresponding mould.For example, earlier with 29 setting of changeover portion inner edge, then to 28 setting of changeover portion outer rim, again to 27 setting of changeover portion inner edge, to 26 setting of changeover portion outer rim, other setting step is identical with embodiment one at last.
Blood vessel reduced mouth part of the present invention can be got involved the mode of carrying by the sheath pipe, is positioned over the position of human body valve of pulmonary trunk.This blood vessel reduced mouth part comprises a support with choked flow film, its support is made of skin, internal layer and changeover portion, its changeover portion can be similar to circular cone, corrugated tube or multilayer folding, discharging the outer meeting of after-poppet expand the original valve of pulmonary trunk of human body, and contact with pulmonary arterial wall, blood flow can only pass through from the centre of support internal layer, to reach the purpose of the lumen diameter that reduces human body valve of pulmonary trunk place.After reduced mouth part places, can then place a cusps of pulmonary valve at the support internal layer by the mode that gets involved.Reduced mouth part can provide enough support forces, prevents the valve displacement, avoids blood flow from the valve periphery seepage.The invention solves behind the Fa Shi tetra logy patient one-stage operation problem that can not repair valve of pulmonary trunk by the mode that gets involved.Use reduced mouth part of the present invention, intervention valve of pulmonary trunk technology can be referred in the middle of this class patient, can reduce wound like this, reduce the risk of operation the patient.Reduced mouth part controllable release of the present invention system can accurately control the release length and the speed of reduced mouth part, makes reduced mouth part arrive desired location smoothly and has normal morphology.Before reduced mouth part discharges fully, reduced mouth part can be recalled, so that reorientate, be very easy to doctor's operation.
The present invention compared with prior art, have the following advantages simultaneously: 1, the blood vessel reduced mouth part technology of the controllable release among the present invention can get involved the lobe technology in conjunction with application with pulmonary artery, realized utilizing the valve of pulmonary trunk behind the mode Xiu Fufashi tetra logy patient one-stage operation that conduit gets involved, avoided secondary surgical repair to the patient, reduced wound to patient, shorten operating time, simplified operation technique.2, the blood vessel reduced mouth part among the present invention has been realized controllable release in patient's body, can locate repeatedly.3, the reduced mouth part among the present invention is a kind of structure of multilayer folding, can it be trailed by external force, and be retracted in the delivery sheath, and this structure Design can be retracted to it in smaller sheath pipe of diameter, has reduced the wound to the patient vessel.4, the innermost layer of blood vessel reduced mouth part of the present invention and outermost layer all are pipes, changeover portion between the ectonexine is conical tube or corrugated tube, changeover portion is close to the tube wall of ectonexine, and be integral network structure, improved mechanical stability, enough strong support force can be provided, both help secure valve, also can prevent the reduced mouth part displacement.5, the fixing choked flow film in the two ends of blood vessel reduced mouth part of the present invention can prevent that blood from revealing from the valve periphery.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. blood vessel reduced mouth part, it comprises a contractile multiwalled network, described support has a near-end and a far-end, the innermost layer of described support has the near-end of a mouth of pipe towards described support, the outermost layer of described support is provided with the far-end of a mouth of pipe towards described support, be provided with a changeover portion between described innermost layer and the outermost layer, it is characterized in that: described changeover portion comprises the conical tube structure, bellows structure, multilayer folding structure or three kinds of structures that structure makes up mutually, described changeover portion is provided with second end near the far-end of first end of the near-end of described support and close described support, described first end is near the innermost layer of described support, described second end is near the outermost layer of described support, and the internal diameter of described first end is less than the external diameter of second end.
2. blood vessel reduced mouth part as claimed in claim 1 is characterized in that: further comprise the choked flow film that is arranged on the described changeover portion, the zone that described choked flow film is set comprises first end and second end of described changeover portion.
3. blood vessel reduced mouth part as claimed in claim 2 is characterized in that: the material of described choked flow film is PET or e-PTFE material.
4. blood vessel reduced mouth part as claimed in claim 1 is characterized in that: spur the mouth of pipe of innermost layer of described support and the outermost mouth of pipe of described support, described support becomes the monolayer tubulose.
5. blood vessel reduced mouth part as claimed in claim 4 is characterized in that: the innermost layer mouth of pipe edge of described support is provided with connecting hole.
6. blood vessel reduced mouth part as claimed in claim 1 is characterized in that: described support is to form with single or many one metal wire braidings.
7. blood vessel reduced mouth part as claimed in claim 1 is characterized in that: described support is to form with the thin metallic tubd engraving.
8. as claim 6 or 7 described blood vessel reduced mouth parts, it is characterized in that: the material of described tinsel or metal tube is a Nitinol.
9. blood vessel reduced mouth part as claimed in claim 6, it is characterized in that: be positioned at tinsel on the outermost layer of far-end and draw in and be fixed on some nodes, the wire end of described each node is welded into a ball, and described ball is evenly distributed on outermost mouth of pipe place.
10. controllable release system that is used to carry and discharge the described blood vessel reduced mouth part of claim 1, comprise drag-line, the sheath pipe, and push rod, the inner chamber that between the near-end of sheath pipe and far-end, has perforation, drag-line and push rod all pass the inner chamber of described sheath pipe, described drag-line, push rod is relative with sheath Guan Douke to slide, described controllable release system has feed status and release conditions, it is characterized in that: described blood vessel reduced mouth part is provided with a near-end, and in described feed status, described blood vessel reduced mouth part is straightened and is in the described sheath pipe, described drag-line is connected with the near-end of described blood vessel reduced mouth part, and the far-end of described push rod contacts the near-end of described blood vessel reduced mouth part; In described release conditions, push rod is slided to sheath pipe far-end, far-end with described blood vessel reduced mouth part discharges from the sheath pipe earlier, relative motion by push rod and sheath pipe, control blood vessel reduced mouth part is by length of releasing from the sheath pipe and speed, near-end until the blood vessel reduced mouth part is released, and drag-line is thrown off from the near-end of described blood vessel reduced mouth part again; Described controllable release system also has the recovery state, before described blood vessel reduced mouth part breaks away from the sheath pipe fully, tightens drag-line and pulls back toward the near-end of sheath pipe, reduced mouth part is shunk and recalls in the sheath pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105217670A CN101961274A (en) | 2010-10-27 | 2010-10-27 | Blood vessel necking device and controlled release system |
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| CN2010105217670A CN101961274A (en) | 2010-10-27 | 2010-10-27 | Blood vessel necking device and controlled release system |
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| CN102961200A (en) * | 2012-11-30 | 2013-03-13 | 宁波健世生物科技有限公司 | Pulmonary valve stent with anchor mechanism |
| CN107835667A (en) * | 2015-07-09 | 2018-03-23 | 奥林巴斯株式会社 | Medicine equipment gatherer |
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