The content of the invention
It is an object of the invention to provide the method for a kind of interim film covering device of intravascular stent and the interim overlay film of intravascular stent,It can prepare to quick and convenient covered stnet and cost is relatively low, when perforating generation timely and effectively with the band film branch prepared temporarilyFrame blocks cut；And whole preparation process does not contact firmly substantially to overlay film and intravascular stent, it is ensured that the integrality of overlay film is simultaneouslyEnsure the protection to intravascular stent.
In order to solve the above technical problems, embodiments of the present invention disclose a kind of interim film covering device of intravascular stent, bagInclude overlay film and intravascular stent accommodates hollow sleeve；
Overlay film is tubular elastomeric overlay film, is socketed in intravascular stent and accommodates on the outer surface of hollow sleeve, and overlay film is in freedomInternal diameter under state is less than external diameter when intravascular stent does not discharge；
Intravascular stent accommodates hollow sleeve and matched for the external diameter of tubulose and internal diameter and the intravascular stent of non-release conditions, bloodPipe holder accommodates hollow sleeve and is used to provide a hollow lumen, and blood supply pipe holder holds in hollow lumen relative to intravascular stentHollow sleeve of receiving translates, with indirectly by the tubular space that is surrounded of intravascular stent introducing overlay film.
The method that embodiments of the present invention also disclose a kind of interim overlay film of intravascular stent, for blood vessel branch such as aboveThe interim film covering device of frame, comprises the following steps：
During the hollow lumen that intravascular stent is formed along intravascular stent receiving hollow sleeve accommodates relative to intravascular stentEmpty set pipe translates, until intravascular stent accommodates hollow sleeve and is socketed on intravascular stent；
Fixed overlay film and intravascular stent, intravascular stent is accommodated into hollow sleeve and extracted out, so that overlay film is coated on blood vessel branchOn frame.
Compared with prior art, the main distinction and its effect are embodiment of the present invention：
The interim film covering device of intravascular stent of the present invention, make while the intravascular stent separated and overlay film quick and convenient can be utilizedStandby covered stnet, timely and effectively cut is blocked with the covered stnet prepared temporarily when perforating and occurring；And whole preparation processOverlay film and intravascular stent are not contacted firmly substantially, it is ensured that the integrality of overlay film simultaneously ensures the protection to intravascular stent；It can keep awayExempt from expensive traditional with the expired Cost Problems brought of film intravascular stent.
Further, overlay film end set has pulling portion, avoids extracting out overlay film when intravascular stent accommodates hollow sleeve and followsMove together, consequently facilitating successfully overlay film set is connected on intravascular stent.
Further, the outer surface that intravascular stent accommodates hollow sleeve is smooth, extracts intravascular stent and accommodates hollow sleeveOverlay film will not be caused to wear during pipe.
Further, the inner surface that intravascular stent accommodates center sleeve is smooth, and intravascular stent is inserted into intravascular stentIt is easier, and intravascular stent will not be caused to damage when accommodating hollow sleeve.
Further, overlay film and intravascular stent accommodate hollow sleeve and had in the difference matched with different blood vessel stent sizeFootpath size, by choosing the overlay film and intravascular stent that match with stent dimensions, it is applicable to different size coronary arteriesPatient.
Further, overlay film is non-rejection biochemical material, can prevent rejection phenomenon.
Embodiment
In the following description, in order that reader more fully understands the application and proposes many ins and outs.But thisEven if the those of ordinary skill in field is appreciated that without these ins and outs and many variations based on following embodimentAnd modification, each claim of the application technical scheme claimed can also be realized.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with implementation of the accompanying drawing to the present inventionMode is described in further detail.
First embodiment of the invention is related to a kind of interim device of overlay film 1 of intravascular stent, and Fig. 1 is that the intravascular stent covers temporarilyThe structural representation of film device.
As illustrated, the interim film covering device of the intravascular stent includes overlay film 1 and intravascular stent accommodates hollow sleeve 2.
Overlay film 1 is tubular elastomeric overlay film, is socketed in intravascular stent and accommodates on the outer surface of hollow sleeve 2, and overlay film 1 is certainlyExternal diameter when intravascular stent does not discharge is less than by the internal diameter under state, such design ensure that accommodates hollow sleeve in the supportAfter pipe 2 is extracted out, overlay film 1 being capable of closely coating stent；
Intravascular stent accommodates hollow sleeve 2 and matched for the external diameter of tubulose and internal diameter and the intravascular stent of non-release conditions,Intravascular stent accommodates hollow sleeve 2 and is used to provide a hollow lumen, and blood supply pipe holder is in hollow lumen relative to blood vessel branchFrame accommodates hollow sleeve 2 and translated, with indirectly by the tubular space that is surrounded of intravascular stent introducing overlay film 1.
In general, intravascular stent accommodates the external diameter phase of the internal diameter and the intravascular stent of non-release conditions of hollow sleeve 2It is more than or equal to the external diameter of intravascular stent with the internal diameter for referring to intravascular stent receiving hollow sleeve 2.
Furthermore, it is to be understood that overlay film 1 must have enough elasticity, because intravascular stent reaches internal target position, (i.e. blood vessel is wornAt hole) be released after, overlay film 1 is strutted by intravascular stent, if overlay film 1 will cause without enough elasticity it is damaged so as to up to notTo the effect of closure cut.
The interim film covering device of intravascular stent of present embodiment, the intravascular stent of separation and overlay film 1 can be utilized quick justCovered stnet is prepared sharply, and timely and effectively cut is blocked with the covered stnet prepared temporarily when perforating and occurring.And whole systemStandby process does not contact firmly substantially to overlay film 1 and intravascular stent, it is ensured that the integrality of overlay film 1 simultaneously ensures the guarantor to intravascular stentShield.Expensive traditional can be avoided with the expired Cost Problems brought of film intravascular stent.
As the preference of present embodiment, the interim film covering device illustraton of model of intravascular stent is illustrated in figure 2.As schemedShow, nontoxic elastic silica gel overlay film is tubulose, is pre-installed in intravascular stent and accommodates on hollow sleeve, pre-designed tubulose silica gel coversThe external diameter and length of film, it is desirable to after tubulose silica gel overlay film is coated on support, support can be firmly held tightly, just as support can be embraced firmlyLocking bracket sacculus is the same.Tubulose silica gel overlay film is firmly tightened up again and accommodated in intravascular stent on hollow sleeve, should in use, taking outDevice, the tubulose silica gel overlay film to match with stent size is chosen, is enclosed on support, taken out intravascular stent and accommodate hollow sleeve,So tubulose silica gel overlay film is just tightly coated on support, and the support for being coated with tubulose silica gel overlay film then is delivered into blood vesselAt perforation with appropriate pressure (according to the match condition and support of vessel diameter and stent size produce design release pressure andThe relation of stent size) release support, as elastic silica gel overlay film is strutted by support, blood vessel cut is also just by tubulose silica gel overlay filmSeal.
Second embodiment of the invention is related to a kind of interim film covering device of intravascular stent, and Fig. 3 is that the intravascular stent covers temporarilyThe structural representation of film device.
Second embodiment is improved on the basis of first embodiment, is mainly theed improvement is that：Overlay film endPortion is provided with pulling portion, avoids extracting out overlay film when intravascular stent accommodates hollow sleeve and and then moves together, consequently facilitating successfullyOverlay film set is connected on intravascular stent；Overlay film and intravascular stent, which accommodate hollow sleeve, has what is matched with different blood vessel stent sizeDifferent inner diameters size, by choosing the overlay film and intravascular stent that match with stent dimensions, it is applicable to different size hatsThe patient of shape artery；Overlay film is non-rejection biochemical material, can prevent rejection phenomenon.Specifically：
, it is necessary to fixed overlay film 1 and blood vessel branch during in order to extract intravascular stent receiving hollow sleeve 2 and past direction force outFrame, or the power of opposite direction is imposed to overlay film 1 and intravascular stent, could by overlay film 1 set be connected on intravascular stent.
Therefore, the end set of overlay film 1 has pulling portion 3, for fixing overlay film 1 so that intravascular stent is accommodated into center sleeveDetach overlay film 1.
As shown in figure 3, there is two " ribbon " (i.e. pulling portion 3) hauling-out one end of overlay film 1, support is inserted into blood vessel during useSupport accommodates hollow sleeve, the proximal edge of support and the proximal edge alignment of hollow sleeve, and two ribbons are pressed and fixedAt mount proximal end edge, then from intravascular stent receiving hollow sleeve is distally pumped, interim overlay film is just mounted on support, thenTwo ribbons remove.
The setting of pulling portion can be diversified forms, for example, in one embodiment, the end of overlay film 1 is additionally setThe latch closure for being easy to drawing is equipped with, in another embodiment, the end of overlay film 1 can also be axially divided into two, so as to be formedTwo can the outward band of overlay film 1, be easy to pull.In other embodiments of the present invention, other forms can also be setPulling portion and be not limited to aforesaid way.
In another preference, overlay film 1 and intravascular stent accommodate hollow sleeve 2 and had to be matched with different blood vessel stent sizeDifferent inner diameters size, to form a series of corresponding different size intravascular stents.So as to freely be selected according to blood vessel diameterSelect intravascular stent.And the size of covered stnet of the prior art is set, regardless of blood vessel diameter, can only put up with makesWith.
For convenience of narration, coronary arterial perforation is now divided into by blood vessel diameter according to the size of Coronary Artery Width at perforation>=2.25mm coronary artery perforation and blood vessel diameter<=2.25mm coronary artery is perforated two kinds.Blood vessel diameter<=2.25mm coronary artery is wornSupport is not put in hole, blood vessel can be closed with gelfoam is directly stifled, because the small nothing of blood vessel very hinders greatly；This technology is only responsible for solutionBlood vessel diameter>=2.25mm coronary artery perforation problem, especially main branch vessel need to be implanted into interim overlay film frame, in interim overlay filmFootpath can make 2.25mm, 2.5mm, 2.75mm, 3.0mm, 3.5mm, 4.0mm, and the support with corresponding size matches respectively.
In another preference, overlay film is non-rejection biochemical material.Further, the material of overlay film is non-toxic material,Non- rejection biochemical material can be specifically nontoxic elastic silica gel.
In addition, overlay film can also be biodegradable, the material of biological absorbable, one section can be kept in vivo effectivelyPhase.
Third embodiment of the invention is related to a kind of interim film covering device of intravascular stent, and the 3rd embodiment is implemented firstImproved on the basis of mode, mainly theed improvement is that：Intravascular stent accommodate hollow sleeve outer surface be it is smooth,Extract when intravascular stent accommodates hollow sleeve and overlay film will not be caused to wear；The inner surface that intravascular stent accommodates center sleeve is lightSliding, it is easier when intravascular stent insertion intravascular stent is accommodated into hollow sleeve, and intravascular stent will not be caused to damage.ToolSay body：
The outer surface that intravascular stent accommodates hollow sleeve 2 is smooth, in order to extract blood vessel branch out toward a direction forceWhen frame accommodates hollow sleeve 2, the frictional force that intravascular stent is accommodated between the outer surface of hollow sleeve 2 and overlay film 1 will not be made to overlay film 1Into abrasion.
It is further preferred that the inner surface that intravascular stent accommodates hollow sleeve 2 is smooth, in order to which intravascular stent is insertedEnter when intravascular stent accommodates hollow sleeve 2 and be easier, and intravascular stent is accommodated between the inner surface of hollow sleeve 2 and intravascular stentFrictional force intravascular stent will not be caused to damage.
Furthermore, it is to be understood that the material that intravascular stent accommodates center sleeve can be polyethylene, and polyamide, polycarbonateDeng being not especially limited in the present invention.
Four embodiment of the invention is related to a kind of method of the interim overlay film of intravascular stent, and Fig. 4 is that the intravascular stent is interimThe schematic flow sheet of the method for overlay film.
As illustrated, the method for the interim overlay film of the intravascular stent is used for the interim overlay film of intravascular stent such as first embodimentDevice, comprise the following steps：
Step 401, hollow lumen intravascular stent formed along intravascular stent receiving hollow sleeve is relative to blood vessel branchFrame accommodates hollow sleeve translation, until intravascular stent accommodates hollow sleeve and is socketed on intravascular stent.
Step 402, fixed overlay film and intravascular stent, intravascular stent is accommodated into hollow sleeve and extracted out, so that overlay film is coated withOn intravascular stent.
Present embodiment is the method embodiment corresponding with first embodiment, and present embodiment can be implemented with firstMode is worked in coordination implementation.The relevant technical details mentioned in first embodiment are still effective in the present embodiment, in order toReduce and repeat, repeat no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in the first implementationIn mode.
Fifth embodiment of the invention is related to a kind of method of the interim overlay film of intravascular stent, and the 5th embodiment is real the 4thApply and improved on the basis of mode, mainly theed improvement is that：Overlay film end set has pulling portion, avoids extracting blood vessel branch outOverlay film and then moves together when frame accommodates hollow sleeve, consequently facilitating successfully overlay film set is connected on intravascular stent.SpecificallySay：
The end of overlay film is additionally provided with pulling portion, in step 402, in addition to sub-step：
The pulling portion of fixed overlay film end, and the intravascular stent of the overlay film end；
Intravascular stent is accommodated into hollow sleeve to extract to the direction opposite with overlay film end.
As the preference of present embodiment, it is illustrated in figure 5 the production of the interim film covering device of whole intravascular stent and makesFlow chart, as shown in the figure：
In process of production, the tubulose nontoxic elastic silica gel overlay film of different inner diameters is first produced, the overlay film is then coated with phaseThe intravascular stent of external diameter is answered to accommodate hollow sleeve；
When in use, intravascular stent receiving hollow sleeve is enclosed on the support of size matching, and by overlay film near-endPulling portion 3 (i.e. ribbon) is pressed on the pole of mount proximal end with fixation, is taken out intravascular stent and is accommodated hollow sleeve, then cuts off and floatBand, so as to which silica gel overlay film coating stent is successful, silica gel overlay film coating stent is delivered at vascular puncture and discharged afterwardsSupport, cut closing at last vascular puncture.
The picture for the interim film-coated vascular support being transported at vascular puncture is illustrated in figure 6,1 is to be coated on branch in figureThe overlay film on frame surface, vascular puncture is blocked after being discharged for support at vascular puncture.
The present invention is a kind of nontoxic elastic accommodated mounted in different size intravascular stents on hollow sleeve that can be used at any timeSilica gel film covering device, and be quickly and easily transported to silica gel overlay film coating stent, overlay film coating stent with the device during useAt vascular puncture, after support release, elastic silica gel overlay film is strutted by support so as to close cut.
Overlay film coating stent can rapidly, be advantageously made, the support is good by performance, can freely be selected according to blood vessel diameterSupport, the cut definite effect of closure perforation blood vessel are selected, and the present apparatus is cheap, and any conduit room can use, suitablyPopularity.
It should be noted that in the claim and specification of this patent, term " comprising ", "comprising" or its is anyOther variants are intended to including for nonexcludability, so that process, method, article or equipment including a series of elementsNot only include those key elements, but also the other element including being not expressly set out, or also include for this process, sideMethod, article or the intrinsic key element of equipment.In the absence of more restrictions, wanted by what sentence " including one " limitedElement, it is not excluded that other identical element in the process including the key element, method, article or equipment also be present.
Although by referring to some of the preferred embodiment of the invention, the present invention is shown and described,It will be understood by those skilled in the art that can to it, various changes can be made in the form and details, without departing from this hairBright spirit and scope.