CN1969777B

CN1969777B - Prosthetic repair of body passages

Info

Publication number: CN1969777B
Application number: CN2006101625778A
Authority: CN
Inventors: 卡尔-卢茨·劳特容
Original assignee: WARSKTEC CO Ltd
Current assignee: WARSKTEC CO Ltd; Vascutek Ltd
Priority date: 1996-06-20
Filing date: 1997-06-19
Publication date: 2010-09-29
Anticipated expiration: 2017-06-19
Also published as: DE19624642B4; DE19624642A1; CN1969777A

Abstract

The clamping ring may be folded along a diametric axis for insertion into the body passage. The clamping ring is adapted to resiliently spring outwardly, once in position inside the body passage, and to be continually resiliently biassed against the interior surface of the body passage. One or more of the clamping rings may be attached to opposed ends of a tubular graft. The rings and connected graft may be positioned in the body passage using an applicator which selectively permits expansion and/or contraction of the annular ring in position within a body passage. Alternatively a retaining member may be used to retain the annular ring in a compressed condition until it is in a desired position within a body passage. In other possible purpose, this invention as blood vessel replant slice fixed membrane for repairing arterial aneurysms useful.

Description

The prosthesis reparation of body conduit

This application be international filing date be on June 19th, 1997, national applications number be 200410056003.3, denomination of invention divides an application for the application for a patent for invention of " the prosthesis reparation of body conduit ".

Technical field

The present invention relates to remain on the device in the body conduit, be specially adapted to fixedly film (stents) of blood vessel transplantation sheet, be called aneurysmal arteriectasia with reparation.

Background technology

Because arteriosclerosis, the part blood vessel may attenuation and extreme expansion.The vascular of these expansions can adopt vascular prosthesis (prosthese) to treat in expansion or the bridging of attenuation extension area.Like this vascular lesion portion just effectively with blood vessel in pressure isolation.

Adopt surgical operation, open vascular, the suture repair thing is in place, and vascular prostheses is inserted the vascular lesion portion, but, preferably adopts conduit system, by remote opening, as inserting prosthesis near inguinal femoral artery.This is that the potential complication that surgical operation is caused is reduced to a minimum owing to avoid opening main cavity.

In general, preferably use conduit amounting to or compressive state insertion prosthesis (prosthesis), when in place then, the expansion prosthesis, a kind of reason of doing like this is to wish to avoid basically during insertion inaccessible blood flow.Therefore, amount to, prosthesis is inserted in the vascular soon, do not make the blood flow obturation in some cases basically by prosthesis.

In general, expansion prosthesis once in place has two kinds of methods in the reparation place, and a kind of is with the ductile metal prosthesis that two kinds of configurations are arranged.Wherein a kind of configuration diameter is very little, and another kind of configuration radially expands very much, contacts and be fastened to vascular diseased region either side cervical region.Prosthesis can be the ductile metal ring, expands by the flatulence conduit, and expansible diameter prosthesis is arranged in the cervical region, contiguous vascular lesion portion.

Another kind of universal method is to adopt the expansion prosthesis, can compress, anti-resilience deflection.Prosthesis is in a single day in place, but just elastic expansion contacts with blood vessel wall.

Although release various method of dealing with problems, effectively walk around pathological tissues, still there is certain defective in existing various prosthetic device structures.For example, in some cases, pathological changes vascular part either side cervical region is very short, and this just makes prosthetic device be difficult to fully be connected the thin neck of aneurysm either side.

In addition, some existing prosthesiss can cause blood flow to block in inserting the prosthesis process, and this plays adverse effect on physiology.Also having problem in addition is that existing many prosthesiss can not fully seal vessel inner surface, and makes blood leakage, sees through prosthesis and enters area between prosthesis and the attenuation blood vessel.The leakage of this pattern may cause the damage consequence.The device of certain structures is not suitable for non-circular or in irregular shape neck region.

It is the prosthesis that various sizes are purchased by requirement hospital that some prosthesis commonly used also has other problem, uses with different patient physiologicals for different situations.And the customization of certain structures requirement prosthesis, be suitable for each concrete patient.

Expand in case also occur prosthesis in addition, be difficult to make prosthesis accurately to be located, in some cases, because of locating inaccurate going wrong.And the prosthesis that in many existing prosthesiss, might have displacement, leave desired location, so that can not bring into play useful effect, the vascular of protection attenuation.

So, owing to these and other reasons, need to continue to improve to solve the method for repairing pathological changes vascular problem, normally solve the problem that prosthetic device effectively is fixed on the body conduit inwall.

Summary of the invention

According to an aspect of the present invention, provide a kind of prosthesis that is used for being positioned blood vessel, comprising: a gillies' graft; One annular resilient element is connected in described gillies' graft, one end of described gillies' graft is fixed on the described annular resilient element, described annular resilient element is amounted to into a C shape structure along a footpath axle, wherein said gillies' graft is arranged to extend along the length of first blood vessel, the end on the described annular resilient element of being fixed on of described gillies' graft is positioned to cross point by described first blood vessel and second blood vessel, thereby can not block the opening that allows described cross point to be communicated with.

According to a further aspect in the invention, provide a kind of prosthesis that is positioned in the blood vessel, comprising: the annular resilient element, it has a footpath axle, described element amounts to roughly C shape structure along described footpath axle, and described C shape element is arranged in the described blood vessel, and its arch section engages with described blood vessel; One gillies' graft, described element are connected in an end of described gillies' graft.

One aspect of the present invention is to keep the device of prosthesis to comprise an annular resilient element at body conduit.This element has an indeformable diameter, greater than the body conduit diameter.

Another aspect of the present invention is that the prosthesis that inserts body conduit comprises a ring-spring element and a gillies' graft.The graft Connection Element.This element has an indeformable diameter, greater than the graft diameter.

It is that the vascular prostheses of repairing pathological changes first vascular comprises an elastic circular ring on the one hand that the present invention has again, and it has first pair and second pair of loop wire, and the former extends to a direction, and the latter then extends round about.First and second pairs of loop wires connect.Gillies' graft links to each other with annulus.The graft of arranging extends along the first vascular length, and first pair of loop wire of layout then prolongs, to small part through second vascular and the first vascular cross point.One of second pair of loop wire forms an opening, and first and second vascular is communicated with, to small part process prosthesis.

A further aspect of the invention is the fixing means of body conduit prosthetic device.Comprise that work step has the elastic circular ring of amounting to, present first configuration, its cross-sectional area is less than the cross-sectional area of indeformable annulus.Annulus places the body conduit desired location, enables strain to second configuration, and its diameter is greater than the first configuration diameter, but cross-sectional area is still less than the cross-sectional area of indeformable annulus.

But according to the present invention on the other hand, the work step that pathological changes vascular prosthesis method comprises also has annulus footpath axle to amount to, and presents little cross sectional configuration, forms a pair of loop wire, extends to leaving the footpath direction of principal axis.Annulus is arranged in the vascular, and it is the contiguous vascular that intersects of axle directly, causes loop wire to extend to small part through the intersection vascular, and not inaccessible intersection vascular.

According to a further aspect of the present invention be the fixing means of body conduit prosthetic device one work step is arranged again is to amount to above-mentioned spring along the footpath axle, make the annular resilient camber of spring.Spring is arranged in the body conduit.Spring expands, and leans against body conduit.Spring is constantly pressed to the outside, leans against body conduit.

But according to the present invention on the other hand, prosthetic device includes artificial heart valve, flexible pipe box, and the latter has first end and second end that can connect valve.Also have the strain annulus to link to each other, and prepare graft is connected to the inner surface of ascending aorta part with second end.

Having according to the present invention is that body conduit insertion prosthesis comprises two annular resilient spring elements and a flexible tubular graft at least on the one hand again, and the latter links to each other with each element.The vertical Connection Element of stiffener.The flexibility of stiffener is lower than graft.

Description of drawings

The one or more embodiment details of the present invention are illustrated in accompanying drawing and the following explanation.Other characteristics of the present invention, purpose and advantage come into plain view from explanation and accompanying drawing and claim.

Fig. 1 is the comprehensive top plan view of the clamp ring of one embodiment of the invention;

Fig. 2 dwindles perspective view at the best Fig. 1 embodiment in place of body conduit;

Fig. 3 is the facade front view before clamp ring inserts body conduit;

Fig. 4 is the facade front view after clamp ring inserts body conduit;

Fig. 5 is a facade side elevation embodiment illustrated in fig. 4;

Fig. 6 is the prosthesis facade front view that has operating means;

Fig. 7 is that Fig. 6 is usually along the profile of 7-7 line;

Fig. 8 is a fixing device part amplification profile shown in Figure 6;

Fig. 9 is that Fig. 8 is usually along the profile of 9-9 line;

Figure 10 is that Fig. 8 is usually along the profile of 10-10 line;

Figure 11 is that the prosthesis that the maintenance loop wire keeps amplifies facade front view;

Figure 12 is that the maintenance loop wire partly amplifies facade front view;

Figure 13 is prosthesis and inserts another embodiment facade front view of device;

Figure 14 is a prosthesis enlarged drawing shown in Figure 13;

Figure 15 inserts the preceding amplification profile embodiment illustrated in fig. 11 of body conduit;

Figure 16 inserts the preceding profile embodiment illustrated in fig. 13 of body conduit;

Figure 17 is at segmentation aorta fork another embodiment facade front view in place;

Figure 18 is at segmentation aorta fork another embodiment facade front view in place;

Figure 19 is that assembly shown in Figure 180 amplifies facade front view;

Figure 20 is that Figure 19 is usually along the profile of 20-20 line;

Figure 21 is that Figure 19 is usually along the profile of 21-21 line;

Figure 22 is and the facade front view of embodiment in addition shown in Figure 14 is corresponding;

Figure 23 is another embodiment part section facade front view;

Figure 24 is the prosthetic device facade front view that is positioned at the part heart.

The specific embodiment

About accompanying drawing, in some figure, all identical parts all adopt same reference number, as Fig. 1, shown in 8 and 10, form round and elastic clamp ring 30 by a lot of elasticity strand 32.One section metal wire is entangled in axle (not having diagram) and goes up an embodiment who constitutes clamp ring 30, and this axle has central shaft " C ", then with anchor line (string) 34 strand is bundled into wire harness.Anchor line (string) 34 can be made with the surgical sutures material.Certainly, clamp ring 30 also can be made of other the whole bag of tricks, comprises the employing single cord, and the multi cord that adopts spiral to tangle is together made the multiply cotton rope, or adopts other suitable methods to make the high resiliency annulus.

According to metal wire that adopts and relevant concrete purposes, strand 32 or coil quantity can be different.But in an embodiment, strand's 32 quantity of employing approximately are 8～10, as shown in figure 10.But, strand 32 or coil quantity can not wait to reaching 100 to 2 less, even may be more.

When adopting various not collinear footpath, the diameter of single strand 32 is approximately 0.05 to 1mm.In an effective embodiment, strand's 32 lines of employing directly are about 0.1mm.

Strand 32 can comprise Nitinol with any high resiliency metal or plastic production, as Buddhist nun's Nore (NiTi) alloy too.Buddhist nun by normal employing elasticity or super-elasticity or martensite form is Nore (NiTi) alloy too.

Annulus 30 diameter D _KAccording to relevant concrete body conduit and great changes have taken place.Aspect the aorta vessel graft, ring footpath approximately 30mm just can meet the demands, and in other use occasions, ring footpath (D _K) about 6 suit to 50mm.In certain embodiments, the ring footpath is preferably 13mm.

About Fig. 1, the annulus 32 diameter D before the compression _KObvious diameter D greater than the body conduit 36 that will treat _RAs shown in Figure 1,30 two diametrically contraposition points of indeformable ring " A " deflection relative to one another.As shown by arrows, cause that like this annulus 30 amounts to along footpath axle " B ".This configuration can make annulus 30 insert the body conduit 36 that dwindles cross-sectional configuration.

Owing to along footpath axle " B " reduced result, have the loop wire 38 of amounting to tip " A ", amount to " B " point of footpath axle near extension with respect to the edge.Adopt as this paper, term " vicinity " refers to about the blood flow updrift side, term " distally " then refer to about the blood flow downstream.

In case in place in body conduit 36, annulus 30 just constantly contacts vascular 36 inwalls, even annulus 30 may produce common sinusoidal form.Represent that with first approximation as shown in Figure 2, height H is the quadratic function of radial compression.

As shown in Figure 2, the minimum bending diameter D that allows of plastic-less deformation _BDepend on material, clamp ring 30 thickness and the independent strand 32 that forms annulus 30.According to Hooke's law, parallel connected spring can be thought by strand 32, but its deflection characteristic value addition, independent low radial tension is added on total tension force, and this tension force depends on the quantity of strand 32.When 30 compressions of whole annulus, each independent strand 32 bending diameter roughly with the single 32 minimum bend diameter D of strand _BConsistent.

According to method of approximation, minimum bend diameter D _BAbout 10 times to line footpath.We just can suppose like this, and annulus 30 lines footpath is less.But the annulus clamping force on the body conduit 36 is the function of its diameter, on the contrary, can suppose, line directly obtains increasing.This trade-off method can be optimized, and promptly adopts many strands 32, by its diameter control minimum bend diameter, forms wire harness again, by its composite diameter control clamping force.Therefore, the clamp ring 30 of formation has very hightension, and compressed configuration is very little.For example, have the annulus 30 of conventional diameter 4 to 6mm, after throwing off conduit, can return to original-shape, and rely on enough tension force, firmly push down annulus 30 along body conduit 36 tube walls.

As shown in Figure 3, prosthesis 40 includes annulus 30 and graft 42.Graft 42 is generally tubulose, is made by fabric or thin film, and an end is fixed on the annulus 30.The diameter D of graft 42 _PDiameter D less than clamp ring 30 _KOwing to be connected between clamp ring 30 and graft 42 ends, at clamp ring and graft 42 abutments formation diameter D _KPClamp ring 30 can expand into gillies' graft 42 and stop or deformation limit, after this can not expand again.Therefore, clamp ring 30 can expand on the regional graft 42 of contiguous clamp ring 30, so that graft 42 diameters are tapered down to quite constant diameter region 46 in zone 44, terminates in free end 47.In other words, but graft 42 preforms are horn shape shown in Figure 3.

The textile material that any suitable human body is implanted all can adopt makes graft 42.For example, making graft 42 can be by terylene, flexible textile that polytetrafluoroethylene is made or knit goods or other materials.If gillies' graft 42 is more favourable by the not labile material of periphery.If the diameter D of graft 42 parts 46 _PRoughly with the body conduit 36 diameter D that will repair _RIdentical then more favourable.

Clamp ring 30 can link to each other with area 44 by sewing up or boning.If clamp ring 30 is arranged on graft 42 inner surfacies, so that in clamp ring 30 extensions, when leaning against body conduit 36 tube walls, graft 42 inserts between pipelines 36 and the clamp ring 30 more favourable.Therefore, clamp ring 30 diameter D very advantageously _KWant remarkable diameter greater than graft 42 parts 46.

About Fig. 4, prosthesis 40 can place ventral aorta 48, contiguous left renal artery 50 and right renal artery 52.Loop wire 38 extends, and through

tremulous pulse

50 and 52, part 53 then is positioned at

tremulous pulse

48 and 50 distal openings just.Therefore, as shown in Figure 5,

tremulous pulse

48 and 50 openings will never be because of being provided with contiguous annulus 30 by inaccessible, because the common c-shaped configuration in annulus 30 cross sections.

Because this configuration, annulus 30 can be fastened on the highly very short indeformable substantially neck regions 54 of constraint aneurysm 55.This is because extend near exceeding beyond the cervical region 54 to small part annulus 30, so in office where face all influences flows through tremulous pulse 48 and 50.In addition, because clamp ring 30 will never be fully expanded to not reduced configuration (as shown in Figure 1), so applicable to cervical region 54 cross sections of irregular configuration.

For example, if cervical region 54 cross sections are non-circular, then be compressed into sine-shaped annulus 30 applicable to irregular body conduit shape.Make annulus 30 unpressed diameter (D _K) greater than the predetermined body conduit diameter (D that is connected _R), be connected thereby between annulus 30 and body conduit 36, produce continuous elasticity, even the overtime expansion of body conduit, still can be continuous.This situation is because normal pulse blood pressure or overtime vasodilation and produce regularly.

In addition, make annulus 30 diameter (D _KP) greater than graft 42 diameter (D _P), so that annulus 30 in place compresses diameter of section (D in graft diameter that uses and the body conduit 36 _K) near consistent.This just reduces around unnecessary graft 42 packs of cervical region 54.

Now introduce the method that prosthesis 40 is arranged on desired location in the pipeline, as shown in Figure 6, fixing device 56 can be fastened on 30 two diametrically contraposition orientation of annulus at least, so that device 56 is extended, is parallel to the axis of prosthesis 40 usually.Device 56 comprises the pipeline 58 of an end and the fixed mount 60 of clamp device 56 and annulus 30.In other words, pipeline 58 available line brake brackets (not having diagram) replace.In some cases, install 56 1 ends and have agnail 62.But, as a rule, agnail 62 is unnecessary.

As shown in Figure 7, install 56 available metal lines 64 and sleeve pipe 66 linkings, the former extends into pipeline 58, and the latter then wraps into metal wire 64.Best is device 56 and the enough inflexible material of sleeve pipe 66 usefulness, because metal wire 64 or sleeve pipe 66 can cause prosthesis 40 displacements in the pipeline 36, and pushes device 56 to.Metal wire 64 diameters are about 0.3 to 1mm.

Prosthesis 40 can compress, and the hollow tubing conductor 68 of packing into is transported to the scene of reparation with prosthesis from remote entrance.For example conduit 68 can insert the femoral artery otch, arrives position in the ventral aorta, and for example, people want to be provided with the place of annulus 30.In case in place, just prosthesis 40 is released conduit 68 by sleeve pipe 66.Particularly the surgeon makes sleeve pipe 66 extend internally from the health outside, keeps conduit 68 in the fixed position simultaneously, thereby makes prosthesis 40 when conduit 68 withdraws from, and still staying to have the position.If desired, fixed mount 60 can be with the material of non-conducting X ray, and as platinum, iridium or gold are made, as the X ray marker.

Although in some use occasion, the above-mentioned method that prosthesis 40 is set is very useful, preferably also will prosthesis 40 be placed specific position with more accurately controlling.In case annulus 30 expands and leans against pipe wall, just will reset, and overcomes the resilience force of annulus 30.Therefore, best is after prosthesis 40 leaves conduit 68, continues control annulus 30, till prosthesis 40 is accurately located.For this reason, shown in Figure 11 and 12, bourdon tube 70 scalable fixedly wire loops 72.Wire loop 72 extends axially, and passes sleeve pipe 70, forms annulus 74, passes contiguous bourdon tube 70 free-ended holes 76 again.At this moment, the ring end 78 of wire loop 72 is accepted plugging-up line 80, and loop wire 78 then stretches out hole 76.

About Figure 11, bourdon tube 70 extends to the position of contiguous loop wire 38 along prosthesis 40 outsides.Annulus 74 is around loop wire 38, extends at its position, length bosom periphery, be engaged on annulus 30 fixed eyelets 82 on.Like this, plugging-up line 80 can axially be extracted out, takes off open-loop 78, thereby wire loop 72 is extracted out, throws off annulus 30, makes it to flick in desired location.Plugging-up line 80 in bourdon tube 70 is got back to the entrance or by gap 71, is withdrawed from bourdon tube 70, as shown in figure 11.

About Figure 15, conduit 68 encases prosthesis 40, and prosthesis encases the sleeve pipe 66 of a pair of band metal wire 64 again, and metal wire passes sleeve pipe.In case of necessity lead 104 can be set, be used for when beginning with catheter directed desired location, and keep add ons to get back to the route of same position where necessary.The bourdon tube 70 that has loop wire 72 and plugging-up line 80 extends between conduit and prosthesis 40 in conduit 68 equally.

In yet another embodiment, shown in Figure 13 and 14, a maintaining body 84 is arranged, prosthesis 40 is remained on compression shape, be fixed on desired location in the pipeline exactly.Mechanism 84 is controlled be shaped on the prosthesis 40 of a pair of annulus 30 ', compression position in conduit 68 couples together by graft 42.Wire conduit 86 passes prosthesis 40 ' extend axially away.There are many little rings 88 to stretch out conduit 86.Each little ring 88 connects wire loop 90, and wire loop links to each other with eyelet 92 at loop wire 38 free ends again.

About Figure 14, each wire loop 90 passes eyelet 92 and slides to get loose and extend out, and constitutes ring end 94.Plugging-up line 96 passes ring end 94 and extends out.Each annulus 30 part is wrapped wire loop 98 along amounting to axis " B ", and wire loop is connected to get up with plugging-up line 100 at free end again.Wire loop 98 surrounds whole annulus 30, passes opening 102 again along wire conduit 86 whole outsides and enters conduit 86 inside.Each annulus 30 of graft 42 opposite ends all has identical parts, available same way as operation.

So, as adjusting the degree of amounting to or a contiguous distally height of orientation annulus 30 as shown in figure 14, only need be pulled outwardly metal wire 98, this line is received on the solid wire 103 simultaneously, and solid wire then extends to the patient outside.In order to reduce the compression of height and minimizing annulus 30, can loosen wire loop 98 tension force, make the natural elasticity of annulus 30 cause annulus 30 bendings and descend reduction annulus height.

After conduit 68 places desired location, adopt preceding method, assembly can be released from conduit.Annulus 30 decrements can be adjusted, so that make device 84 temporarily be in desired location.If measure, the inaccuracy that the position is adjusted then can be operated wire loop 98 compressor again, makes device 84 readjust reposition.Like this, even prosthesis gets loose in advance, be connected body conduit after, also might adjust selectively prosthesis 40 ' the position.If begin wrongly, as required, also be easy to the position of resetting prosthesis.In case prosthesis is positioned at desired location, just can pass through conduit 68 simply with plugging-up

line

100 and 96 pull-out assemblies.Can make prosthesis 40 ' unidirectional expansion like this.Take out conduit 86 then.

If desired, available independent metal wire is connected to the patient outside with each loop wire 98.Perhaps add the above, connect loop wire 98 like this, promptly have only a single line to reach the outside.

Referring now to Figure 16, before conduit 68 is thrown off in expression, the vessel cluster of Figure 13 and 14 illustrated embodiment, conduit 68 encirclement prosthesiss 40 '.In prosthesis 40 ' inside is wire conduit 86, and it has the metal wire 103 more than one or, is used for controlling the position that annulus 30 is amounted to part.In wire conduit 86 outsides is a pair of and plugging-up

line

96 and 100 corresponding metal wires.

According to another embodiment of the present invention, as shown in figure 17, prosthesis 40 replenishes one or more add-on assemble, as prosthesis 106.Second prosthesis, 106 scalable linking first prosthesiss 40 are connected and adopt annulus 30, outwards expand, and overcome the resistance that graft 42 produces.Second prosthesis 106 comprise annulus 30 ' and following annulus 30 ".Last annulus 30 ' linking graft 42, following annulus 30 " then is connected distally cervical region 54b.Because second prosthesis 106 enters the telescopic extendable amount of first prosthesis 40 and can adjust, the vascular of various longitudinal sizes is done extensively to arrange so can adapt to.

Comprise a pair of annulus 30 ' and 30 " prosthesis 106 have an anti-vertical torsion line 31, as shown in figure 23.These line 31 encirclement annulus 30 ' and 30 ", control prosthesis 106 reverses or twists around the longitudinal axis, and additional vertically support is provided.The transplanted things 42 of metal wire 31 cover, or in prosthesis 106 inside metal wire 31 are set, or the graft 42 braided metal lines of making by fabric 31.If desired, can be around annulus 30 ' and 30 " the additional metal line 31 more than one or is set on every side.

Second prosthesis 106 can be located in first prosthesis, uses lead 104, and after the used whole metal wires of first prosthesis are set have pulled down, still remaining on to have the position.Make second prosthesis 106 get back to same position then, use lead 104, behind first prosthesis, 40 location, still remaining on to have the position.

The lead 104 same graft openings that keep.But in practice, blood flow is crossed the effect that prosthesis 40 causes, as the expansion wind sleeve of opening.Therefore, utilize the guiding function of lead 104, can make second prosthesis 106 be connected the inner surface of graft 42.Like this, two

prosthesiss

40 and 106 combination can be adjusted the spacing of

cervical region

54a and 54b by changing prolongation degree that prosthesis 106 enters prosthesis 40.

As shown in figure 22,

prosthesis

40 and 106 is gone back available mechanisms 84 location.Be positioned at the prosthesis 106 of prosthesis 40, available one group of additional plugging-up line 96 ' insertion patient.Plugging-up line 96 ' pass lower ring line 94 and prosthesis 40 internally extends.Prosthesis 106 can be operated separately like this, the adjustment of stretching in prosthesis 40 scopes.In this case, metal wire 98 and 98 ' can separately move on to the patient outside is convenient to operate separately

prosthesis

40 and 106.

Prosthesis same as described above also can be used to constitute fixedly film 120 of forked graft, and as shown in figure 18, this mould stretches out ventral aorta 48 and relevant cervical region 54a thereof, and process is cervical region 54b down, enters iliac artery or pelvis tremulous pulse 108 and 110.In addition, aforesaid prosthesis 40 is set, adapter neck 54a.Next adopts the prosthesis 112 of special configuration to replace foregoing prosthesis 106.As shown in figure 19, prosthesis 112 can comprise the annulus 30 of upper end ' and a pair of annulus 114 of lower end.Annulus 114 does not need compression, because prosthesis 112 lower ends keep open configuration fully.

Shown in Figure 20 and 21, there is the circulus of an aforementioned pattern prosthesis 112 upper ends.The lower end then is a double tubular structure, comprises a pair of pipeline of being made up of connecting portion 118 116, and connecting portion extends axially along prosthesis 112, forms two independent cells 116, termination annulus 114.Annulus 114 orientations, angled with prosthesis 112 axis, make to be easy to enter from

iliac artery

108 and 110.

Prosthesis 120 two-way each

iliac arterys

108 or 110 of inserting of a pair of minor diameter are to be connected prosthesis 112.Particularly going up ring 30 " passes annulus 114, enters pipeline 116 inside again, in this outside expansion, lean against graft 42.Meanwhile, each prosthesis 120 other end 122 is connected iliac artery 108 or the 110 cervical region 54b of place.Adopt the pre-aligned used same lead of prosthesis of configuration can insert one of prosthesis 120.But other prosthesis 120 is configuration separately, not restricted by that lead.For this reason, annulus 30 " and 114 can adopt the X-ray-preventing material, is convenient to annulus 114 location and prosthesis 120 and passes, the lead that need not set in advance just can insert.

Very obvious, adopting under said apparatus and the method situation, even in surgical procedures, basically without occlude blood flow just configurable prosthesis 40,40 ', 120.In addition, the

prosthesis

40,40 of configuration ' or 120, do not hinder the intersection vascular basically, as renal artery.Simultaneously can adopt method for shaping that different physiology is adjusted.Cooperate the annulus 30 that needs never to extend to entirely not deformed shape, this means, do not need to purchase fixedly film of various graft.But very big restriction might be arranged, so a kind of size device, just can adapt to various patient's situations.

Because annulus 30 is in place at body conduit to be C shape configuration, prosthesis might be arranged on quite narrow cervical region 54 areas.Because annulus 30 remains on compressive state and uses, so applicable to short-term and long-term expansion of curing pipeline.In addition, apply spring deflection pressure to annulus 30, so between annulus 30 (and prosthesis) and body conduit tube wall,, still can keep good sealing contact even pipeline is irregular shape owing to constant.

Adopting under the above-mentioned collocation method condition, prosthesis accurately might be arranged in the required body conduit.This is because prosthesis when being shipped to desired location, remains on the initial compression state, so that needn't overcome that frictional force just can place the appropriate location between prosthesis and the vascular pipeline.In case be in desired location, prosthesis just can activate, and is connected tube wall.Also might after being connected tube wall, when needing, reconfigure prosthesis in addition.Be convenient to accurate configuration like this, avoid after presenting unmodifiable expanded configuration, need attempting to reconfigure prosthesis.Like this, the surgeon just is good at controlling (for example, by lead and sleeve pipe), and prosthesis is placed the most effective position exactly.

In addition, also can use prosthesis 40, replace rising (up) aortic disease part, as shown in figure 24.In the aorta part, after surgical removal, annulus 30 can be placed in ascending aorta " D " remainder.Clamp ring 30 is own, is fixed on aorta " D " inner surface as mentioned above.Clamp ring connects flexible pipe box or graft 42, and graft 42 connects suture ring 130 again, is convenient to link to each other with mechanical heart valve 132.The person skilled in the art understands thoroughly valve and graft details, and sets forth to some extent in the U.S. Patent No. 5,123,919 that people such as Sauter deliver, and this paper enrolls hereby, for your guidance.

According to related organization's amount, graft 42 can have any different length.The ratio diagram that graft 42 can extend is far away, also can be very short.For example, every place that needs replacement heart valve, graft 42 proportions connect mechanical valve prosthesis 132 and the short cover of the flexibility of annulus 30 no better than.

Although the present invention is described with regard to the best embodiment of limited quantity, the person skilled in the art still can identify and do many modifications and change.For example, although in some cases, device as the aneurysmal blood vessel transplantation sheet of treatment fixedly film be described, the present invention is also applicable to any device fixing on internal pipeline.In addition, self-evident, some embodiments of the present invention have only above-mentioned advantage more than or, and do not have special described other advantages of this paper.This means that as long as belong to the row of the true spirit and the scope of claims, then claims just are applicable to all such modifications and change.

Claims

1. be used for being positioned the prosthesis of blood vessel, comprise:

One gillies' graft;

One annular resilient element is connected in described gillies' graft, one end of described gillies' graft is fixed on the described annular resilient element, described annular resilient element is amounted to into a C shape structure along a footpath axle, wherein said gillies' graft is arranged to extend along the length of first blood vessel, the end on the described annular resilient element of being fixed on of described gillies' graft is positioned to cross point by described first blood vessel and second blood vessel, thereby can not block the opening that allows described cross point to be communicated with.

2. the described prosthesis of claim 1 is characterized in that: it is roughly the same that the diameter of described gillies' graft and prosthesis are positioned at the diameter of blood vessel wherein.

3. the described prosthesis of claim 1, it is characterized in that: described annular resilient element has an indeformable diameter greater than described gillies' graft diameter.

4. the described prosthesis of claim 1 is characterized in that: the indeformable diameter of described annular resilient element is positioned at wherein blood vessel diameter greater than described prosthesis.

5. the described prosthesis of claim 1, it is characterized in that: described annular resilient element is made of the elasticity strand of a branch of common center axle.

6. prosthesis that is positioned in the blood vessel comprises: the annular resilient element, and it has a footpath axle, and described annular resilient element amounts to roughly C shape structure along described footpath axle, and described C shape element is arranged in the described blood vessel, and its arch section engages with described blood vessel;

One gillies' graft, described annular resilient element is connected in an end of described gillies' graft.

7. the described prosthesis of claim 6, it is characterized in that: described gillies' graft is suitable for extending along the length of one first blood vessel, can pass through the cross point of described first blood vessel and second blood vessel with an end of the described annular resilient element of being connected in of described gillies' graft with locating, thereby can not block the opening that allows described cross point to be communicated with.

8. the described prosthesis of claim 6 is characterized in that: it is roughly the same that the diameter of described gillies' graft and prosthesis are positioned at the diameter of blood vessel wherein.

9. the described prosthesis of claim 6 is characterized in that: described annular resilient element do not amount to the diameter of diameter greater than described gillies' graft.

10. the described prosthesis of claim 6 is characterized in that: the diameter of not amounting to of described annular resilient element is positioned at wherein blood vessel diameter greater than described prosthesis.

11. the described prosthesis of claim 6 is characterized in that: described annular resilient element is made of the elasticity strand of a branch of common center axle.