阅读说明：本技术 用于支撑管腔医疗器械的支撑装置及喷涂系统 (Support device for supporting lumen medical instrument and spraying system ) 是由 曹瀚文 于 2018-07-27 设计创作，主要内容包括：本发明涉及一种用于支撑管腔医疗器械的支撑装置,该用于支撑管腔医疗器械的支撑装置包括遮挡结构,遮挡结构包括多个挡片,多个挡片呈放射状排列,且多个挡片的外接圆的直径与管腔医疗器械的内径相等。使用用于支撑管腔医疗器械的支撑装置对支架进行支撑以进行喷涂时,支架套设于遮挡结构上,每个挡片的外侧面与支架的内壁抵接,支架与用于支撑管腔医疗器械的支撑装置的接触面积大大减小,有利于避免出现覆膜甚至涂层脱落的情况发生；并且,多个挡片能够对滴落的喷涂液形成有效遮挡,因而能够减少支架内壁上的药物含量。(The invention relates to a supporting device for supporting a lumen medical instrument, which comprises a shielding structure, wherein the shielding structure comprises a plurality of blocking pieces, the blocking pieces are radially arranged, and the diameter of a circumscribed circle of the blocking pieces is equal to the inner diameter of the lumen medical instrument. When the support is supported by using the support device for supporting the lumen medical instrument for spraying, the support is sleeved on the shielding structure, the outer side surface of each baffle is abutted against the inner wall of the support, the contact area between the support and the support device for supporting the lumen medical instrument is greatly reduced, and the occurrence of the condition that a film is coated or even a coating falls off is favorably avoided; and a plurality of separation blades can effectively shelter from the spraying liquid that drips, therefore can reduce the medicine content on the support inner wall.)

1. The utility model provides a strutting arrangement for be used for supporting lumen medical instrument, includes shelters from the structure, its characterized in that, shelter from the structure and include a plurality of separation blades, a plurality of separation blades are radial arrangement, just the diameter of the circumscribed circle of a plurality of separation blades equals with lumen medical instrument's internal diameter.

2. The support device for supporting a luminal medical device as defined in claim 1 wherein the angle formed between adjacent baffles is less than or equal to 90 °.

3. A support device for supporting a luminal medical device as claimed in claim 1 wherein one end of each flap is connected to one end of the other flap, the other end of each flap extending radially outwardly to provide a radial array of the plurality of flaps.

4. The support device for supporting a lumen medical instrument as claimed in claim 1, wherein the shielding structure further comprises a connecting tube, the plurality of blocking pieces are spaced apart from each other and radially arranged on an outer circumferential surface of the connecting tube, and the plurality of blocking pieces extend in an axial direction of the connecting tube.

5. The support device for supporting a lumen medical instrument of claim 4, wherein the plurality of blocking pieces are movably arranged on the outer circumferential surface of the connecting pipe so that the diameter of the circumcircle of the plurality of blocking pieces is adjustable.

6. The support device for supporting a luminal medical device as defined in claim 1 wherein the surface of each baffle is provided with an absorbent membrane.

7. A support device for supporting a luminal medical device as claimed in claim 1 wherein the thickness of each flap ranges from 1 mm to 2 mm.

8. The support device for supporting a luminal medical device as defined in claim 1 further comprising a drive member connected to the shielding structure.

9. The support device for supporting a luminal medical device as defined in claim 8, wherein the driver is a cylindrical structure and the diameter of the driver is greater than the diameter of the circumcircle of the plurality of baffles.

10. The support device of claim 8, further comprising a connector, wherein one end of the connector is connected to the shielding structure and the other end of the connector is connected to the driving member.

11. A spraying system comprises a driving motor and spraying equipment, and is characterized by further comprising the supporting device for supporting the lumen medical instrument as claimed in any one of claims 1 to 10, wherein the lumen medical instrument is arranged on the supporting device for supporting the lumen medical instrument, the driving motor is connected with the shielding structure and used for driving the shielding structure to rotate and translate, and the spraying equipment is used for spraying materials on the surface of the support.

Technical Field

The invention relates to the field of medical instruments, in particular to a supporting device for supporting a lumen medical instrument and a spraying system.

Background

Coronary artery stent implantation is the first choice method of coronary heart disease interventional therapy at present, and the coronary heart disease interventional therapy is continuously improved from the early stage of simple balloon dilatation and metal bare stent to a drug eluting stent.

The drug eluting stent is generally provided with a drug coating on the surface of the stent, and the drug released from the drug coating directly and intensively acts on the damaged blood vessel to timely and effectively prevent thrombosis.

At present, the drug coating of most drug eluting stents in the market is simultaneously present on the outer wall, the side wall and the inner wall of the stent, and the drug coating which acts in a human body is only one side of the stent contacted with the blood vessel wall, namely the drug coating positioned on the outer wall of the stent. The drug coating on the outer wall of the stent plays a role in inhibiting intimal hyperplasia so as to prevent vascular restenosis, but the drug coatings on the side wall and the inner wall of the stent can flow to the whole body along with blood to play a role in tissues and organs of the whole body. If the amount of the drug on the inner wall of the stent can be reduced, even the inner wall of the stent does not contain the drug, the dosage of the drug can be reduced under the condition that the stent obtains the same effectiveness, so that the inhibition effect of the drug on endothelialization is reduced, the postoperative endothelialization speed is accelerated, and the time for a patient to take the double-drug-resistant drug can be shortened.

However, in the present stage, the preparation of the coating on the surface of the stent is mainly realized by a mechanical semi-automatic spraying device, namely, a clamp is clamped at one end of the stent to fix the stent on the clamp, then a cylindrical mandrel is inserted into a cavity of the stent to be used as a shield, the end of the stent far away from the clamp is sprayed, after the spraying is finished, the stent is turned around and loaded, and then the spraying is carried out by the same method. The preparation efficiency of the method is low. In addition, in the method, the contact area between the stent and the cylindrical mandrel is too large, so that the stent is subjected to film covering and even coating falling after spraying.

Disclosure of Invention

Based on this, there is a need for a supporting device for supporting a lumen medical device, so as to support the lumen medical device when preparing a drug coating on the lumen medical device, reduce the drug content on the inner wall of the lumen medical device, and reduce the occurrence of the peeling of a coating film or even a coating layer.

The utility model provides a strutting arrangement for be used for supporting lumen medical instrument, includes and shelters from the structure, shelter from the structure and include a plurality of separation blades, a plurality of separation blades are radial arrangement, just the diameter of the circumscribed circle of a plurality of separation blades equals with lumen medical instrument's internal diameter.

In one embodiment, an angle formed between two adjacent baffles is smaller than or equal to 90 °.

In one embodiment, one end of each baffle plate is connected with one end of the other baffle plate, and the other end of each baffle plate extends radially outwards to enable the plurality of baffle plates to be arranged radially.

In one embodiment, the shielding structure further includes a connecting pipe, the plurality of blocking pieces are spaced apart from each other and radially arranged on an outer circumferential surface of the connecting pipe, and the plurality of blocking pieces extend along an axial direction of the connecting pipe.

In one embodiment, the plurality of blocking pieces are movably arranged on the outer peripheral surface of the connecting pipe, so that the diameter of a circumscribed circle of the plurality of blocking pieces can be adjusted.

In one embodiment, the surface of each baffle is provided with an adsorption film.

In one embodiment, the thickness of each baffle plate ranges from 1 mm to 2 mm.

In one embodiment, the support device for supporting a luminal medical instrument further comprises a drive member connected to the shielding structure.

In one embodiment, the driving member is a cylindrical structure, and the diameter of the driving member is larger than the diameter of the circumcircle of the plurality of baffle plates.

In one embodiment, the supporting device for supporting the lumen medical instrument further comprises a connecting member, one end of the connecting member is connected with the shielding structure, and the other end of the connecting member is connected with the driving member.

The utility model provides a spraying system, includes driving motor and spraying equipment, still includes the above-mentioned strutting arrangement who is used for supporting lumen medical instrument, lumen medical instrument locates on the strutting arrangement who is used for supporting lumen medical instrument, driving motor with it links to each other to shelter from the structure, driving motor is used for the drive shelter from the structure rotation and translation, spraying equipment be used for to the surface spraying material of support.

When the supporting device for supporting the lumen medical instrument is used for supporting the lumen medical instrument to spray, the lumen medical instrument is sleeved on the shielding structure, the outer side surface of each baffle plate is abutted to the inner wall of the lumen medical instrument, and compared with the supporting mode of a traditional cylindrical mandrel, the supporting device for supporting the lumen medical instrument has the advantages that the contact area between the lumen medical instrument and the supporting device for supporting the lumen medical instrument is greatly reduced, and the occurrence of the condition that a film is coated or even a coating layer is dropped is favorably avoided; and moreover, the plurality of baffle plates can effectively shield the dripping spraying liquid, so that the content of the medicine on the inner wall of the medical instrument with the tube cavity can be reduced.

Drawings

FIG. 1 is a schematic view of one embodiment of a support device for supporting a luminal medical device;

FIG. 2 is a schematic view of a stent loaded on the support device shown in FIG. 1 for supporting a luminal medical device;

FIG. 3 is a micrograph of a stent with a coating;

FIG. 4 is a schematic view of another embodiment of a stent for supporting a luminal medical device in an assembled state with a stent;

fig. 5 is a schematic view showing a state of dripping of the spray liquid at the time of spraying.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, one embodiment of a support device 100 for supporting a luminal medical device includes a shielding structure 20. The shielding structure 20 includes a plurality of blocking pieces 22, the blocking pieces 22 are arranged in a radial shape, and the diameter of the circumscribed circle of the blocking pieces 22 is equal to the inner diameter of the lumen medical device. The plurality of baffles 22 are evenly distributed.

The support device 100 for supporting a luminal medical instrument is used for supporting a luminal medical instrument. The following is an example of a luminal medical device as a stent. Referring also to fig. 2, when the surface of the stent 10 is to be coated to form a coating, the stent 10 is placed on a support device 100 for supporting a lumen medical device. Specifically, the blood vessel stent 10 is sleeved on the shielding structure 20, and the blood vessel stent 10 is supported by a plurality of baffle plates 22. The support device 100 for supporting the luminal medical device is connected to a drive mechanism (not shown in figures 1 and 2) which drives the support device 100 for supporting the luminal medical device to rotate and translate, thereby rotating and translating the stent 10.

Referring to fig. 1 again, the baffle plate 22 is a sheet-shaped structure, and since the plurality of baffle plates 22 are radially arranged, the area of the outer side surface 222 of the baffle plate 22 is small. In the spraying process, the inner wall of the blood vessel support 10 is abutted against the outer side surfaces 222 of the plurality of baffle plates 22 and is supported by the supporting device 100 for supporting the lumen medical appliance, and the contact area between the blood vessel support 10 and the outer side surfaces 222 of the plurality of baffle plates 22 is small, so that the spraying liquid can be prevented from being excessively concentrated on the contact part between the baffle plates 22 and the blood vessel support 10. Since the spraying liquid has a certain viscosity, when the spraying liquid is excessively concentrated on the contact portion between the baffle 22 and the blood vessel stent 10 during the spraying process, the baffle 22 and the blood vessel stent 10 are easily adhered together. When the stent 10 is separated from the flap 22 after the completion of the spraying, on the one hand, the spraying liquid is excessively concentrated on the contact portion, which results in the formation of an undesirable coating on a local area of the stent 10, and as shown in fig. 3, an undesirable coating 30 appears on the stent rod 12. On the other hand, when the stent 10 is separated from the stopper 22, the coating is easily damaged or even peeled off due to adhesion of the two. Therefore, the contact area between the intravascular stent 10 and the outer side surfaces 222 of the plurality of baffle plates 22 is small, so that the situation that the coating falls off even after being sprayed can be effectively avoided. In addition, in the spraying process, the spraying liquid dripping from the hollow part of the intravascular stent 10 is shielded by the plurality of baffle pieces 22, so that the spraying liquid can be reduced and even completely prevented from splashing on the inner wall of the intravascular stent 10.

One end of each baffle 22 is connected to one end of another baffle 22, and the other end extends radially outward so that the plurality of baffles 22 are arranged radially. In the present embodiment, the baffle 22 has a rectangular sheet structure. The length of the long side of the baffle plate 22 is equal to the length of the blood vessel stent 10. The surface of each baffle plate 22 with the smaller area on the long side is fixedly connected with the surface of the other baffle plate 22 with the smaller area on the long side, so that the baffle plates 22 are arranged in a radial shape. That is, the surface of each baffle 22 opposite the outer side 222 is connected to the corresponding surface of the other baffle 22 to form the shielding structure 20.

It is understood that the plurality of baffles 22 may be radially arranged by being connected together by welding or the like. Alternatively, the shielding structure 20 may be formed integrally, for example, the shielding structure 20 may be formed by cutting a solid steel pipe through a numerical control machine.

Referring to fig. 4, in another embodiment, the shielding structure 20 further includes a connecting tube 24. The plurality of baffle pieces 22 are arranged on the outer circumferential surface of the connecting pipe 24 at intervals and are arranged in a radial shape, and the plurality of baffle pieces 22 extend in the axial direction of the connecting pipe 24. The plurality of baffle pieces 22 are arranged at equal intervals. The length of the connecting tube 24 is equal to the length of the baffle 22. It is understood that in other embodiments, the length of the connecting tube 24 may be greater than the length of the flap 22. The connecting tube 24 may be a solid tube or a hollow tube. It is understood that a plurality of blocking pieces 22 may be welded or the like to the outer circumferential surface of the connecting tube 24 at intervals to form the shielding structure 20. The plurality of flaps 22 and connecting tubes 24 may also be integrally formed to form the shield structure 24.

In one embodiment, the plurality of blocking pieces 22 are movably disposed on the outer circumferential surface of the connecting tube 24 so that the diameter of the circumscribed circle of the plurality of blocking pieces 22 can be adjusted, so that the supporting device 100 for supporting the lumen medical instrument can be applied to lumen structures with different tube diameters. Specifically, the blocking pieces 22 can be movably disposed on the outer peripheral surface of the connecting pipe 24 through a pull rod structure, and the distance between the outer side surface 222 of the blocking piece 22 and the connecting pipe 24 is adjusted through the pull rod structure, so as to adjust the diameter of the circumscribed circle of the blocking pieces 22.

It can be understood that the smaller the thickness of the baffle plate 22, the smaller the contact area between the baffle plate 22 and the blood vessel stent 10 is, and when the thickness of the baffle plate 22 is sufficiently small, the contact between the baffle plate 22 and the stent 10 is line contact, which is further beneficial to avoiding the occurrence of covering film. However, as the thickness of the baffle plate 22 is smaller, the processing is more difficult, and the strength of the baffle plate 22 is poorer. Considering the difficulty of the comprehensive processing, the strength of the baffle plate 22 and the contact area with the vascular stent 10, when the thickness of the baffle plate 22 is greater than 2 mm, the film covering is likely to occur, and therefore, the thickness range of the baffle plate 22 is preferably 1 mm to 2 mm.

The number of the blocking pieces 22 is at least 4, and when the blocking pieces 22 are uniformly distributed, that is, an included angle α (see fig. 1) between two adjacent blocking pieces 22 is smaller than or equal to 90 degrees, when the number of the blocking pieces 22 is smaller than 4, for example, 3, please refer to fig. 5, when the spraying liquid drops are sprayed out from the nozzle 200, the part shown by the arrow a is just hollowed out, and the part shown by the arrow B is just a non-hollowed-out part, the inner wall of the intravascular stent 10 is inevitably stained with the spraying liquid, so that the inner wall of the intravascular stent 10 is inevitably contaminated with a small amount of medicine, when the number of the blocking pieces 22 is at least 4, the occurrence of the situation can be avoided, so that the amount of the medicine on the inner wall of the intravascular stent 10 can be reduced, even the medicine is completely avoided, on the inner wall of the intravascular stent 10 is inevitably contaminated, on the premise that the number of the blocking pieces 22 is at least 4, the number of the blocking pieces 22 is reasonably set according to the pattern of the intravascular stent 10, when the hollowed-out rate of the intravascular stent 10 is high, the number of the blocking pieces 22 is reasonably increased, and when the hollowed-out rate of the blocking pieces 10 is low, the blocking pieces 10 is reasonably reduced.

Further, the shielding structure 20 further includes an adsorption film. The surface of each baffle 22 is covered with an adsorption film (not shown) for adsorbing the surplus spray liquid. In the spraying process, the spraying liquid entering the lumen of the intravascular stent 10 from the hollow part of the intravascular stent 10 falls on the surface of the baffle plate 22 and is adsorbed by the adsorption film on the surface of the baffle plate 22. The surface of each baffle 22 is provided with an adsorption film to adsorb excessive spraying liquid so as to prevent the spraying liquid from converging into liquid flow on the baffle 22, and then the liquid flow drips and is infected on the inner wall of the blood vessel stent 10 due to gravity in the rotating process.

In order to absorb the surplus spray liquid in all directions, the adsorption film covers all the exposed surfaces of the baffle pieces 22. The adsorption film can be covered on the surface of the baffle plate 22 by means of sticking, extruding and the like, so that the adsorption film can be reliably attached on the surface of the baffle plate 22, and the adsorption film can not fall off along with the rotation of the supporting device 100 for supporting the lumen medical instrument in the spraying process. Moreover, the adsorption film can be easily peeled off from the baffle 22 so that the adsorption film can be replaced with a new one after saturated adsorption.

Specifically, the adsorption membrane may be a polytetrafluoroethylene membrane (PTFE membrane), filter paper, a fiber membrane having adsorption performance, or the like.

The shielding structure 20 of the supporting device 100 for supporting a lumen medical instrument supports the intravascular stent 10 through the plurality of radially arranged blocking pieces 22 and the outer side surfaces 22 of the plurality of blocking pieces 22, and shields the inner wall of the intravascular stent 10 through the plurality of blocking pieces 22, so that the spraying liquid is reduced or even prevented from being infected on the inner wall of the intravascular stent 10.

Further, the adsorption film is arranged on the surface of the baffle 22, so that the spray droplets falling on the baffle 22 can be adsorbed, and the phenomenon that the spray droplets are converged into liquid on the baffle 22 and thrown away along with the rotation of the supporting device 100 for supporting the lumen medical instrument and fall on the inner wall of the intravascular stent 10 is avoided. Therefore, the above-described stent 100 for supporting a luminal medical device provided with an absorbent film can achieve a complete single-sided coating, i.e., a discontinuous coating without any spray liquid residue on the inner wall of the stent 10. Moreover, because the condition of film coating is avoided, the condition of coating damage can not occur when the intravascular stent 10 is separated from the supporting device 100 for supporting the lumen medical instrument after the spraying is finished, and a high-quality coating can be prepared, thereby being beneficial to ensuring the production yield.

Further, referring again to fig. 1, the support device 100 for supporting a luminal medical device further comprises a drive member 40. The driving member 40 has one end connected to the shielding structure 20 and the other end connected to a driving motor (not shown). Under the driving of the driving motor, the driving member 40 drives the shielding structure 20 to rotate and translate.

Specifically, in the present embodiment, the driving member 40 has a cylindrical structure. One end of the driving member 40 at which one bottom surface is located is connected to one end of the shielding structure 20, and the other end of the driving member at which the other bottom surface is located is connected to the driving motor. For example, the shielding structure 20 is connected to the bottom surface of the driving member 40 by welding, a threaded hole is opened at one end of the driving member 40 where the other bottom surface is located, and the driving member 40 is in threaded connection with the output shaft of the driving motor.

In the present embodiment, the diameter of the driving member 40 is larger than the diameter of the circumscribed circle of the plurality of stoppers 22. It is understood that in other embodiments, the diameter of the driver 40 may be equal to or less than the diameter of the circumscribed circle of the plurality of flaps 22.

Further, the support device 100 for supporting a luminal medical instrument may further comprise a connector 60. In the present embodiment, the connector 60 also has a cylindrical structure. One end of the connecting member 60 at which one bottom surface is located is connected to one end of the shielding structure 20, and the other end of the connecting member at which the other bottom surface is located is connected to the bottom surface of the driving member 40. The diameter of the connecting member 60 is equal to the diameter of the circumscribed circle of the plurality of flaps 22.

It will be appreciated that the connector 60 may be omitted, but the connector 60 is provided such that a gap is formed between the stent 10 and the driver 40 during spraying, to avoid the nozzle colliding with the driver 40 during spraying.

In the present embodiment, the length of the baffle plate 22 is equal to the length of the blood vessel stent 10. In other embodiments, the length of the flap 22 may be greater than the length of the stent 10. In this case, the connecting member 60 can be omitted, and when spraying, the end of the blood vessel stent 10 far away from the driving member 40 is aligned with the end of the blocking piece 22 far away from the driving member 40, so that a gap is formed between the blood vessel stent 10 and the driving member 40, and the nozzle can be prevented from colliding with the driving member 40 during spraying. Thus, the nozzle and the driver 40 can also be protected by extending the length of the flap 22 reasonably. However, since the thickness of the flap 22 is small, the flap 22 is easily bent when the length of the flap 22 is excessively long. Therefore, the connecting member 60 is also advantageous for shortening the length of the baffle plate 22, preventing the baffle plate 22 from bending, and improving the service life of the supporting device 100 for supporting the lumen medical instrument.

In further embodiments, when the support device 100 for supporting a luminal medical device further comprises a connecting tube 24, the drive member 40 may be directly connected with the connecting tube 24. For example, the driving member 40 is a cylindrical pipe member, one end of the driving member 40 extends into the connecting pipe 24 and is connected to the connecting pipe 24, and the other end of the driving member 40 is connected to an output shaft of the driving motor. It will be appreciated that in this case, the outer diameter of the driver 40 is smaller than the outer diameter of the stent 10, and that during the spraying process, no nozzle collision with the driver 40 occurs, and the connector 60 may be omitted.

No matter what structure and connection mode are adopted for the components of the supporting device 100 for supporting the lumen medical instrument, all the components can be connected in a welding mode to form the supporting device 100 for supporting the lumen medical instrument, or the supporting device is integrally cut and formed by a numerical control machine.

It should be noted that the lumen medical device in the supporting device 100 for supporting the lumen medical device may have various lumen structures, including a finished lumen medical device, a lumen medical device preform, and the like. For example, the luminal medical device can be, but is not limited to, a vascular stent, a preform of a closure, and the like. The vascular stent may be, but is not limited to, an aortic stent, a coronary stent, a peripheral stent, and the like.

Further, a spraying system is also provided, which comprises a driving motor, a spraying device and the supporting device 100 for supporting the lumen medical instrument. During spraying, the intravascular stent 10 is sleeved on the shielding structure 20 of the supporting device 100 for supporting the lumen medical instrument, the driving motor is connected with the shielding structure 20 and used for driving the shielding structure 20 to rotate and translate, and the spraying equipment is used for spraying materials to the surface of the intravascular stent 10, namely spraying liquid on the surface of the intravascular stent 10 to form a coating.

When the support device 100 for supporting a luminal medical instrument further comprises a drive member 40, the drive motor is directly connected to the drive member 40.

The supporting device 100 for supporting the lumen medical instrument of the spraying system can better support the vascular stent 10, and the supporting device 100 for supporting the lumen medical instrument can form line contact with the vascular stent 10, so that the condition that a coating film or even the coating falls off is avoided, and the production yield is greatly improved. In addition, the supporting device 100 for supporting the lumen medical instrument can shield and adsorb redundant spraying liquid, can prevent the spraying liquid from dripping on the inner wall of the intravascular stent 10, so that no drug residue is left on the inner wall of the intravascular stent 10, thereby preventing the drugs on the inner wall of the intravascular stent 10 from inhibiting endothelialization, being beneficial to accelerating endothelialization speed, and effectively shortening the time for a patient to take double-drug-resistant drugs.

Moreover, the coating prepared by the spraying system can finish the spraying of the whole surface of the intravascular stent 10 by one-time spraying without fixing one end and spraying the other end like the traditional method; then the bracket is turned around and loaded, and the other end of the bracket is sprayed. Therefore, the spraying system is used for spraying, and the production efficiency is greatly improved.

The above-described spray coating system is further illustrated by the following specific examples.