CN101926699A - Atrial septal pore-forming scaffold and conveyor thereof - Google Patents

Abstract

The invention discloses an atrial septal pore-forming scaffold and a conveyor thereof. The scaffold is in continuous netted structure; the width of a section rod of a main unit section which is positioned in the middle is larger than that of section rods of secondary unit sections which are positioned on both sides of the scaffold so that deformation resistance of the secondary unit sections on both sides of the scaffold is less; after the scaffold is implanted, both sides of the scaffold are first expanded to form a trumpet shape, and the main unit section in the middle is then expanded to form a column shape, thus the scaffold forms the structure with the column shape in middle and the trumpet shape on both sides. Because a certain effect of 'dog bone' is generated in the process of scaffold expansion, i.e. a process of axial retraction is generated after scaffold expansion, the trumpet shape formed on both sides is just fastened outside a formed pore after retracting slightly when the atrial septal pore-forming scaffold is expanded, and thus the scaffold is accurately positioned, can be firmly fixed in the formed hole and are not easy to fall off to both sides.

Description

Atrial septal pore-forming scaffold and carrier thereof

Technical field

The present invention relates to medical instruments field, particularly a kind of atrial septal pore-forming scaffold and carrier thereof.

Background technology

In the blood of human body cycling mechanism, anoxia blood enters right atrium through caval vein, enter right ventricle by Tricuspid valve then, right ventricle shrinks blood is pressed into pulmonary circulation mechanism by valve of pulmonary trunk, get back to left atrium through the blood behind the lung oxygen saturation through pulmonary vein, arrive left ventricle through Bicuspid valve again, the left ventricle contraction enters aorta with blood by aortic valve and returns to the body cycling mechanism.

Atrioseptostomy is as the palliative treatment of complicated congenital heart disease, be between the infant left atrium, to set up traffic by interventional method, left atrium blood is mixed, improve arterial oxygen saturation, improve hypoxemia, guarantee the infant survival, rescue gaining time for surgical operation, and make the infant hemodynamics change the metastable state that is in, for the surgical operation in later stage is created better condition.Clinical neostomy commonly used generally can't accurately be controlled the size of pore-creating, has postoperative pore-creating rebound phenomenon, and this causes part patient postoperative severe hypoxia mass formed by blood stasis, hypotension even death to occur.

For addressing the above problem, use atrial septal pore-forming scaffold that the pore-creating that interventional method forms is supported, avoid postoperative pore-creating retraction.But also do not have at present the support of atrial septal pore-forming special use, substitute support and come off easily, and because to be forbidden to make support both sides vertically to enter the atrium too much in the location.

Summary of the invention

The invention provides a kind of atrial septal pore-forming scaffold, this support is in fixation of atrial septal pore-forming place and accurate positioning.

The present invention also provides a kind of carrier of above-mentioned atrial septal pore-forming scaffold.

Technical scheme of the present invention is achieved in that

A kind of atrial septal pore-forming scaffold, key are that this support comprises:

Lay respectively at the pair unit joint of the column of support both sides vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting;

Be positioned at the master unit joint of the column of mid-stent vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting; The pole width of described master unit joint is greater than the pole width of described pair unit joint;

Connecting rod connects adjacent described master unit joint and described pair unit joint.

A kind of carrier of atrial septal pore-forming scaffold, key are, comprising:

Import head, its front end has thread eye, and the diameter of front end is less than the diameter of rear end;

Sacculus is enclosed within on the foley's tube, can make to press by expansion to be held in self surface, atrial septal pore-forming scaffold expansion as claimed in claim 1;

Foley's tube, its front end pass sacculus and pass and import a rear end, and core has thread eye;

The epitheca pipe, it has the inner chamber that can accommodate described sacculus and foley's tube, and its front end sleeve is importing outside the rear end and is having the opening that can supply described foley's tube to pass;

The epitheca tube socket, it is located at epitheca pipe rear end, has to penetrate to the passage of epitheca pipe for foley's tube.

As seen, make the atrial septal pore-forming scaffold among the present invention have the continuous network structure by master unit joint, pair unit joint and connecting rod, owing to be positioned at the pole width that the pole width of the master unit joint at middle part saves greater than the pair unit that is positioned at both sides, make that the resistance of deformation of support both sides pair unit joint is less, so after implantation, support both sides expansion earlier form flaring shape, and the back expansion of middle part master unit joint forms the shape of column.Support presents middle column, the flaring structure in both sides like this.Owing to all have certain " dog bone " effect in the support process of expansion, it is support has an axial retraction after expansion process, when making among the present invention the atrial septal pore-forming scaffold expansion, just in time be stuck in the outside of pore-creating behind the tubaeform retraction slightly that both sides form, accurately locate thus, and can be firm be fixed on the pore-creating position, be difficult for coming off to both sides.

Description of drawings

Fig. 1 is the structural representation of first kind of atrial septal pore-forming scaffold of the present invention;

Fig. 2 is the structural representation after the support expansion shown in Figure 1;

Fig. 3 is the structural representation of second kind of atrial septal pore-forming scaffold of the present invention;

Fig. 4 is the structural representation after the support expansion shown in Figure 1;

Fig. 5 is the structural representation of first kind of carrier of atrial septal pore-forming scaffold of the present invention;

Fig. 6 is the structural representation of second kind of carrier of atrial septal pore-forming scaffold of the present invention.

The specific embodiment

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Atrial septal pore-forming scaffold among the present invention comprises:

Lay respectively at the pair unit joint of support both sides vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting.

Be positioned at the master unit joint of mid-stent vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting.The pole width of above-mentioned master unit joint is greater than the pole width of above-mentioned pair unit joint.

Connecting rod connects adjacent above-mentioned master unit joint and above-mentioned pair unit joint.

This shows, above-mentioned master unit joint, pair unit joint and connecting rod make the atrial septal pore-forming scaffold among the present invention have the continuous network structure, owing to be positioned at the pole width that the pole width of the master unit joint at middle part saves greater than the pair unit that is positioned at both sides, make that the resistance of deformation of support both sides pair unit joint is less, so after implantation, support both sides expansion earlier form flaring shape, and the back expansion of middle part master unit joint forms the shape of column.Support presents middle column, the flaring structure in both sides like this.Owing to all have certain " dog bone " effect in the support process of expansion, it is support has an axial retraction after expansion process, when making among the present invention the atrial septal pore-forming scaffold expansion, just in time be stuck in the outside of pore-creating behind the tubaeform retraction slightly that both sides form, accurately locate thus, and can be firm be fixed on the pore-creating position, be difficult for coming off to both sides.Further, atrial septal pore-forming scaffold among the present invention, because its structural characteristics, make only need once expand just can be accurate and firm implantation pore-creating position, once expand earlier with respect to prior art support is implanted pore-creating, the support two ends respectively once expanded in case anti-avulsion falls again, use the atrial septal pore-forming scaffold among the present invention, reduced operating difficulty greatly, and shortened operating time.

Introduce two embodiment of atrial septal pore-forming scaffold of the present invention below.

Embodiment one

Fig. 1 is the structural representation of first kind of atrial septal pore-forming scaffold of the present invention, and Fig. 2 is the structural representation after the support expansion shown in Figure 1.Support 10 illustrated in figures 1 and 2 comprises: thepair unit joint 2 and the connecting rod 3 of 1, two column of master unit joint of a column.

Thepair unit joint 2 of two columns lays respectively at the both sides ofsupport 10 vertically, and joining end to end is somepoles 21 of wavy arrangement, saves 2 cylinder along orientation around constituting each pair unit.The wavy ripple of cylinder of eachpair unit joint 2 is wide all identical with wave height.In other application scenarios, the wavy ripple of cylinder of eachpair unit joint 2 wide with wave height can be not identical entirely yet.

The master unit joint 1 of a column is positioned at the middle part ofsupport 10 vertically, and joining end to end is somepoles 11 of wavy arrangement, saves 1 cylinder along orientation around constituting master unit.The width of thepole 11 of master unit joint 1 is greater than the width of thepole 21 ofpair unit joint 2, and it is less to make that like this pair unit saves the both sides drag at 2 places, can expand flare earlier when expansion.

The master unit joint 1 in the present embodiment and the cylinder ofpair unit joint 2 are the shape of near sinusoidal ripple, and in other application scenarios, this cylinder also can be designed to other types.

Connecting rod 3 connects adjacent master unit joint 1 and pair unit joint 2.All be connected with a connecting rod 3 between every pair of crest of the relative side of cylinder of adjacent master unit joint 1 andpair unit joint 2 and the trough, be the full cut-off ring structure, guarantee that thus support 10 has enough support strengths, further strengthens fastness.The width of connecting rod 3 is smaller or equal to the width of thepole 11 of master unit joint 1, to increase the compliance of support.Certainly, the relative side of cylinder of adjacent master unit joint 1 and adjacentpair unit joint 2 also can every interval is some just be connected with a connecting rod 3 to crest and trough.

Connecting rod 3 is the S type, can play suitable buffering for the change in location between each unit joint like this.Connecting rod 3 and connecting rod 3 ' can also be designed to other flexure types, for example U type, V-type and N type etc.The width of connecting rod 3 does not have decisive influence to the structure ofsupport 10, and when compliance was less demanding, the width of connecting rod 3 can be greater than the width ofpole 11.

Be the destabilization problems that prevents to occur in the support process of expansion, the width of thepole 11 of master unit joint 1 is smaller or equal to the thickness of self, and the width of thepole 21 ofpair unit joint 2 is smaller or equal to the thickness of self, and the width of connecting rod 3 is smaller or equal to the thickness of self.Above-mentioned width refers to all that perpendicular to the width on the plane of bending direction thickness all refers to be parallel to the thickness on the plane of bending direction.

Support in the present embodiment can be formed through laser engraving by medical stainless steel pipe or Co-base alloy material or other materials tubing.

Embodiment two

Fig. 3 is the structural representation of second kind of atrial septal pore-forming scaffold of the present invention, and Fig. 4 is the structural representation after the support expansion shown in Figure 3.Support shown in Fig. 3 and Fig. 4, basic identical with the supporting structure shown in Fig. 1 and Fig. 2, only connecting rod is straight type, to be suitable for the support compliance is had different situations about requiring.

More than two embodiment, two kinds of concrete application of only having enumerated atrial septal pore-forming scaffold of the present invention, wherein each structure of Xiang Ximiaoshuing only is a kind of giving an example, in different application scenarios, the quantity of each unit joint, the crest of each unit segmented column face and trough quantity, wave height and ripple are wide and the shape and the width of connecting rod, all be provided with arbitrarily, just enumerate no longer one by one at this from the stressed angle of the overall situation.

Fig. 5 is the structural representation of the carrier of atrial septal pore-forming scaffold of the present invention, and this carrier comprises: import 51, thebase 56 ofsacculus 52, foley'stube 53,epitheca pipe 54,epitheca tube socket 55 and foley's tube.In the following description, be positioned at an end of front when front end refers to transfer gantry, be positioned at an end of back when the rear end refers to transfer gantry.

Above-mentioned importing 51, its front end has thread eye (not shown among Fig. 5 and Fig. 6), and the diameter of front end is less than the diameter of rear end.

Above-mentionedsacculus 52 is enclosed within on the foley'stube 53, and its outer surface is pressed and possessed atrial septal pore-forming scaffold 10.Thissacculus 52 makes above-mentioned atrial septal pore-formingscaffold 10 expansions, support pore-creating after injecting expansion of liquids.As a kind of preferred implementation, the diameter of above-mentionedsacculus 52 can be chosen as the millimeter greater than atrial septal pore-forming diameter 2-4.

Foley'stube 53, its frontend pass sacculus 52 and penetrate and import 51 rear end, and core has thread eye.

Epithecapipe 54, it has the inner chamber that can accommodatesacculus 52 and foley'stube 53, and its front end can be enclosed within and imports outside 51 rear end and have the opening that can pass for foley's tube 53.The inner chamber ofepitheca pipe 54 is used to accommodate the diameter of the fore-end of describedsacculus 52, be far longer than the diameter (Fig. 5 and Fig. 6 are all not shown) thatepitheca pipe 54 inner chambers are used for accommodating the rear end part of foley'stube 53, make the rear end ofepitheca pipe 54, promptly less like this, when carrying, reduce the degree ofepitheca pipe 54 occluding vasculars near the size of the part ofepitheca tube socket 55.

Epithecatube socket 55, it is located atepitheca pipe 54 rear ends and has and can penetrate to the passage ofepitheca pipe 54 for foley's tube 53.The sidewall ofepitheca tube socket 55 has a through hole, and this through hole connects three-way valve 551.Three-way valve 551 is used for injecting normal saline and contrast agent inepitheca pipe 54.

Thebase 56 of foley's tube, front end connect the rear end of foley'stube 53, have twoopenings 561 and 562 that are communicated with respectively with thread eye andsacculus 52, by theopening 562 that is communicated withsacculus 52, can inject liquid insacculus 52 so thatsacculus 52 expansions.

Carrier shown in Figure 5, its effective length is longer, between 80 centimetres～150 centimetres, is used for the intervene operation of femoral artery or femoral venous puncture, and atrial septal pore-formingscaffold 10 is delivered to pore-creating.The effective length of this carrier can also be designed to short situation shown in Figure 6, specifically between 25 centimetres～45 centimetres, is used for the hybridization operation, and promptly at the suitable position little otch of performing an operation earlier, the method that reuse is got involved is delivered to pore-creating with atrial septal pore-forming scaffold 10.Effective length as herein described refers to that foley'stube 53 rear ends are to the length that imports between 51 front end.

Fig. 5 and carrier shown in Figure 6 also comprise miscellaneous part, and the present invention does not make improvements these parts, therefore repeat no more here.

The work process of following carrier specifically comprises: along seal wire carrier is delivered to pore-creating, make the position of support and pore-creating overlapping, recall the epitheca pipe and make support touch pore-creating; With the normal saline that contains contrast agent the full support that makes of sacculus is expanded to size with the pore-creating size conforms, thereby makes bracket leg prop up pore-creating; Shrink sacculus and break away from support; Sacculus is taken in the epitheca pipe and taken out external.Thus, utilize carrier and only once expand just can atrial septal pore-forming scaffold of the present invention is accurate, firm implantation pore-creating position.

In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. an atrial septal pore-forming scaffold is characterized in that, this support comprises:

Lay respectively at the pair unit joint of the column of support both sides vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting;

Be positioned at the master unit joint of the column of mid-stent vertically, its cylinder is wavy arrangement by joining end to end some poles along orientation around constituting; The pole width of described master unit joint is greater than the pole width of described pair unit joint;

Connecting rod connects adjacent described master unit joint and described pair unit joint.

2. atrial septal pore-forming scaffold as claimed in claim 1 is characterized in that, the wavy ripple of cylinder of described master unit joint is wide identical with wave height, and the wavy ripple of cylinder of described pair unit joint is wide identical with wave height; Perhaps, the wavy ripple of cylinder of described master unit joint is wide not identical entirely with wave height, and the wavy ripple of cylinder of described pair unit joint is wide not identical entirely with wave height.

3. atrial septal pore-forming scaffold as claimed in claim 1 or 2 is characterized in that, between the every pair of crest and trough of the relative side of cylinder of adjacent described master unit and described pair unit joint, all is connected with a described connecting rod; Perhaps, the adjacent described master unit joint and the relative side of cylinder of described pair unit joint, every interval is some to crest and trough, is connected with a described connecting rod.

4. atrial septal pore-forming scaffold as claimed in claim 1 is characterized in that, the width of the pole of described master unit joint is smaller or equal to the thickness of self, and the width of the pole of pair unit joint is smaller or equal to the thickness of self.

5. atrial septal pore-forming scaffold as claimed in claim 1 is characterized in that, the width of described connecting rod is smaller or equal to the width of the pole of described master unit joint.

6. atrial septal pore-forming scaffold as claimed in claim 1 is characterized in that, described connecting rod is flexure type or straight type.

7. the carrier of an atrial septal pore-forming scaffold is characterized in that, comprising:

Import head, its front end has thread eye, and the diameter of front end is less than the diameter of rear end;

Sacculus is enclosed within on the foley's tube, can make to press by expansion to be held in self surface, atrial septal pore-forming scaffold expansion as claimed in claim 1;

Foley's tube, its front end pass sacculus and pass and import a rear end, and core has thread eye;

The epitheca pipe, it has the inner chamber that can accommodate described sacculus and foley's tube, and its front end sleeve is importing outside the rear end and is having the opening that can supply described foley's tube to pass;

The epitheca tube socket, it is located at epitheca pipe rear end, has to penetrate to the passage of epitheca pipe for foley's tube.

8. carrier as claimed in claim 7 is characterized in that, described epitheca tube cavity is used to accommodate the diameter of the fore-end of described sacculus, is far longer than the diameter that described epitheca tube cavity is used to accommodate the rear end part of foley's tube.

9. carrier as claimed in claim 8 is characterized in that, the total length of an importing front end is arrived between 80 centimetres～150 centimetres in the foley's tube rear end.

10. carrier as claimed in claim 7 is characterized in that, the total length of an importing front end is arrived between 25 centimetres～45 centimetres in the foley's tube rear end.

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