CN115192249A - External auditory canal support capable of being trimmed - Google Patents

Abstract

The embodiment of the disclosure discloses a support capable of trimming an external auditory canal. This external auditory canal support can prune includes: the pipe comprises a pipe body, wherein through holes arranged in an array are formed in the pipe body, the pipe body comprises a plurality of pipe sections arranged along the axial direction, the pipe sections are connected together, and a first pre-broken line is arranged between every two adjacent pipe sections; and a drug-loaded layer, the drug-loaded layer is sleeved outside the tube body, and a porous structure is formed on the outer surface of the drug-loaded layer and is used for containing drugs.

Description

External auditory canal support capable of being trimmed

Technical Field

The invention relates to the technical field of medical instruments, in particular to a support capable of trimming an external auditory canal.

Background

The human ear comprises three parts of an outer ear, a middle ear and an inner ear. Generally, there are cyst, inflammation or tumor problems caused by congenital or late intervention in the outer ear and middle ear. In the case of diseases such as cysts or tumors, the physician will typically excise them, after which the surgical site will need to be medicated and the external auditory canal will need to be supported accordingly to restore the external auditory canal to its original form. The existing medicine application and support scheme is to insert a cotton sliver, a yarn strip, a silicone tube or an alloy bracket which is stuck with medicine into the external auditory canal to support the external auditory canal and apply medicine to the operation position.

However, the external auditory meatus of different patients has different shapes, and the supporting shape is difficult to control by the mode, so that effective support cannot be formed; moreover, the above method is difficult to adjust its size to suit different patients, which eventually results in the failure of the support structure to fit tightly to the affected part, resulting in failure of the support and the medication. In addition, still can produce some pus at the postoperative affected part, adopt above-mentioned mode, be difficult to in time discharge the outer ear with the pus, secondary infection can be aroused to accumulational pus, is unfavorable for postoperative to resume.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

An object of the present invention is to provide a new solution for trimming the external auditory canal support.

According to one aspect of the present invention, there is provided a trimmable external ear canal support. This can prune external auditory canal support includes: the pipe comprises a pipe body, wherein through holes arranged in an array are formed in the pipe body, the pipe body comprises a plurality of pipe sections arranged along the axial direction, the pipe sections are connected together, and a first pre-broken line is arranged between every two adjacent pipe sections; and a drug-loaded layer, the drug-loaded layer is sleeved outside the tube body, and a porous structure is formed on the outer surface of the drug-loaded layer and is used for containing drugs.

Optionally, the body includes through path section and toper section, the toper section with the one end of through path section is connected, the through path section with the one end that the toper section was carried on the back mutually is formed with first oral area, the toper section with the one end that the through path section was carried on the back mutually is provided with the second oral area, the slope of second oral area sets up, the angle of slope and the inclination phase-match of tympanic membrane, the second oral area is constructed and is used for the top to hold the tympanic membrane, the structure on medicine-carrying layer with the structure phase-match of body.

Optionally, at least one of the passage section and the tapered section comprises a plurality of the tube segments.

Optionally, the pipe body is of an integral structure, the first pre-breaking line is a circumferential groove along the outer surface of the pipe body, a plurality of grooves are formed in the pipe body, and the pipe body is divided into a plurality of pipe sections by the grooves.

Optionally, the tube is a degradable material.

Optionally, the drug-loaded layer is an electrostatic spinning film material, a flock fabric, a non-woven fabric, gauze, plastic, rubber or silica gel.

Optionally, the drug-loaded layer is bonded, sprayed, dip coated or vapor deposited outside the tube body.

Optionally, a plurality of rows of the through holes are arranged on the tube body, and the through holes in each row are arranged along the axial direction of the tube body.

Optionally, a plurality of second pre-breaking lines extending in the axial direction are arranged on the outer surface of the pipe body.

Optionally, the pipe body is of an integral structure, and the second pre-breaking line is a groove along the axial direction of the outer surface of the pipe body.

In this disclosed embodiment, can easily prune this body according to different patients 'the duct size through first line of breaking in advance to make the size of body be adapted to the size of duct, and then can carry out effectual support to patient's external auditory canal. The outside cover at the body is equipped with the medicine carrying layer, and the medicine carrying layer can effectively hold corresponding treatment medicine through the porous structure of self, and under the supporting role of body, the medicine carrying layer can be with the close laminating of affected part and release the medicine, makes the effect in the affected part that the medicine can be accurate like this, is favorable to the recovery in postoperative affected part, has avoided because of the infection inflammation scheduling problem that the not in place causes of using medicine. In addition, the body can utilize the latus rectum structure of self to drop the pus or the scab that the postoperative produced and in time discharge the ear outside, has prevented the infection that the pus is piled up or the scab is piled up and is triggered, is favorable to the good recovery of duct.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded view of a trimmable external ear canal support according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of a tubular body according to an embodiment of the present disclosure.

Fig. 3 is an assembly schematic of a trimmable external ear canal support according to an embodiment of the present disclosure.

Fig. 4 is a schematic view of another trimmable external ear canal support according to an embodiment of the present disclosure.

Description of the reference numerals:

1. a tube body; 2. a through hole; 3. a pipe section; 4. a first pre-breaking line; 5. a drug-loaded layer; 6. a first mouth portion; 7. a second mouth portion; 8. second pre-breaking; 9. a path section; 10. a tapered section; 11. an air bag.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one embodiment of the present disclosure, a trimmable external ear canal support is provided. As shown in fig. 1, the trimmable external auditory canal support includes: a tube body 1 and a drug-loaded layer 5.

Through holes 2 arranged in an array are arranged on the tube body 1. The tubular body 1 comprises a plurality of tubular segments 3 arranged in an axial direction. A plurality of pipe sections 3 are connected together. A first pre-break line 4 is arranged between adjacent pipe sections 3. The drug-carrying layer 5 is sleeved outside the tube body 1. The outer surface of the drug-loaded layer 5 is formed with a porous structure. The porous structure is configured to contain a drug.

For example, through holes 2 are arranged in an array on the tube 1. When the tube body 1 is placed in the external auditory canal, the affected part can contact with a part of air through the through hole 2, so that the internal of the external auditory canal keeps a dry environment, and the tube body is favorable for preventing the affected part from being in a moist and moist state for a long time to cause further inflammatory ulcer.

In one example, the shape of the through-hole 2 is a quadrangle. For example, the through-hole 2 may be rectangular, rhombic, or parallelogram, etc.

In this embodiment, set up the shape of through-hole 2 into the above-mentioned shape that easily warp, be favorable to like this when body 1 stretches into the external auditory canal, body 1 produces extrusion deformation according to the form of external auditory canal, and then make the shape that sets up through-hole 2 on body 1 also can adaptability regulation self produce and warp, when body 1 produced the deformation, through-hole 2 was because the difficult fracture of producing the through-hole 2 department on the body 1 that leads to of deformation is produced to self shape, and then damaged the problem of this external auditory canal support. The through hole 2 is set to the shape, so that the safety and the practicability of the external auditory canal support are further improved.

The tubular body 1 comprises a plurality of tubular segments 3 arranged in an axial direction. A plurality of pipe sections 3 are connected together. A first pre-break line 4 is arranged between adjacent pipe sections 3. The user can select 3 numbers of pipeline sections that need to be cut out according to patient's external auditory canal size to cut out body 1 along the orbit of first line 4 of cutting off in advance, finally obtain with user external auditory canal size assorted body 1.

The setting of first line of breaking in advance 4 makes tailorring of body 1 light convenient, and can guarantee to tailor the remaining body 1 that the back obtained (need place in the inside body 1 of external auditory canal) and idle body 1 (need not place in the inside body 1 of external auditory canal after tailorring) and all keep complete body 1 form, the accuracy of tailorring has been improved, finally make to remain body 1 and effectively exert the supporting role in external auditory canal, idle body 1 still can regard as body 1 deposit simultaneously, material cost has been practiced thrift.

The drug-carrying layer 5 is sleeved outside the tube body 1. The outer surface of the drug-loaded layer 5 is formed with a porous structure. The porous structure is configured to contain a drug. The porous structure of the 5 outside faces of drug-loaded layer can effectually hold the medicine, no matter all has good bearing effect to the medicine of powdered, graininess or liquid form for the medicine can be attached to on drug-loaded layer 5 well, has avoided stretching into the in-process of external auditory canal at body 1, and drug-loaded layer 5 and external auditory canal looks friction and then make the medicine drop in external auditory canal, lead to the medicine can't act on actual affected part.

5 covers of medicine-carrying layer are established outside body 1, and medicine-carrying layer 5 can effectively hold corresponding treatment medicine through the porous structure of self, and under the supporting role of body 1, medicine-carrying layer 5 can closely laminate and release the medicine with the affected part, makes the effect that the medicine can be accurate in the affected part like this, is favorable to the recovery in postoperative affected part, has avoided because of not in place infection inflammation scheduling problem that causes with the medicine. The support of body 1 to the outer duct can make the skin of postoperative affected part restore naturally under the slow-release effect of medicine and under the supporting action of body 1, has avoided the production of scar. In addition, the body 1 can utilize the latus rectum structure of self to drop the pus or the scab that the postoperative produced and in time discharge the ear outside, has prevented that the pus from piling up or the scab from piling up the infection that causes, is favorable to the good recovery of duct.

In one example, as shown in fig. 4, an air bag 11 is further provided between the pipe body 1 and the drug-loaded layer 5. The air bag 11 is sleeved on the tube body 1. The structure of the air bag 11 is matched with that of the medicine-carrying layer 5. The inner wall of the air bag 11 is attached to the outer wall of the tube body 1. The outer wall of the air bag 11 is attached to the inner wall of the drug-loaded layer 5.

Under 11 uninflated conditions of gasbag, stretch into external auditory canal with body 1 in, place when suitable support position when body 1, aerify gasbag 11, because gasbag 11's structure and medicine carrying layer 5's structure phase-match, make gasbag 11 after aerifing can form even top to medicine carrying layer 5 like this and hold the effect, and then make medicine carrying layer 5 can form good contact with external auditory canal, improved accuracy and the validity of using medicine.

It should be noted that the drug-loaded layer 5 can be disposed outside the pipe body 1 by means of adhesion, spraying, dipping, or vapor deposition.

Under the condition that the drug-loaded layer 5 is arranged on the outer side of the tube body 1 in a bonding mode, the external auditory canal support is specifically assembled in a mode that: the air bag 11 is sleeved on the outer wall of the tube body 1, and then the medicine-carrying layer 5 is directly bonded on the air bag 11 to form the final shape of the external auditory canal bracket.

Under the condition that the drug-loaded layer 5 is arranged outside the tube body 1 in a spraying, dip-coating or vapor deposition mode, the external auditory canal bracket further comprises a film layer. The film layer is provided on the outer wall of the airbag 11. The film layer matches the structure of the bladder 11. The material of the film layer may be an elastic material, such as plastic, rubber, etc.

The drug-loaded layer 5 is formed on the thin film layer by means of spraying, dip coating or vapor deposition. This enables the drug-loaded layer 5 to be formed uniformly on the film layer outside the airbag 11, rather than directly on the airbag 11, avoiding the problem of uneven coating directly on the airbag 11 and the problem of the airbag 11 breaking the drug-loaded layer 5 when inflated and expanded as it is directly on the airbag 11.

Under the condition that the air bag 11 is inflated, the inflated air bag 11 can simultaneously form an even jacking effect on the thin film layer and the medicine carrying layer 5, so that the medicine carrying layer 5 can be in good contact with the external auditory canal, and the accuracy and effectiveness of medicine use are improved.

In one example, as shown in fig. 2, the tubular body 1 includes a pass section 9 and a tapered section 10. The tapered section 10 is connected to one end of the drift diameter section 9. The end of the through-diameter section 9 opposite the tapered section 10 is formed with a first mouth 6. The end of the conical section 10 opposite to the drift diameter section 9 is provided with a second mouth part 7. The second mouth portion 7 is obliquely arranged. The angle of inclination matches the angle of inclination of the tympanic membrane. The second mouth 7 is configured to support the tympanic membrane. The structure of the medicine-carrying layer 5 is matched with that of the tube body 1.

It should be noted that the included angle between the external auditory canal and the tympanic membrane of the human ear is not 90 °, but is an acute angle smaller than 90 °. In this embodiment, the tubular body 1 comprises a through section 9 and a conical section 10. The end of the conical section 10 opposite to the drift diameter section 9 is provided with a second mouth part 7. The second mouth portion 7 is disposed obliquely. The angle of inclination matches the angle of inclination of the tympanic membrane. Can make the toper section of body 1 when stretching into the external auditory canal like this, second oral area 7 can with the eardrum with the good laminating of acute angle that presents between the external auditory canal, be favorable to the accurate of medicine on the drug-loaded layer 5 to use medicine, in addition, adapt completely like this and can play good supporting role with body 1 of external auditory canal form to the external auditory canal.

In addition, the tube body 1 is provided with the path section 9 and the conical section 10, and the second opening is provided at one end of the conical section 10, so that the path section 9 can form good effective support for the external auditory canal (external auditory canal far away from the tympanic membrane), and the conical section 10 can closely fit with the internal external auditory canal (external auditory canal near the tympanic membrane) and form good support.

If all set up body 1 to latus rectum section 9, one end at latus rectum section 9 directly sets up the slope oral area, when stretching into external auditory canal with body 1 like this, the eardrum may be secondary injury to the slope oral area that directly sets up on the latus rectum section 9, set up body 1 to latus rectum section 9 and toper section 10, set up the second oral area 7 of slope on the toper section 10, toper section 10 can play the cushioning effect to the contact of body 1 and eardrum, can let the toper section slowly be close to the eardrum earlier, the second opening 7 of the slope that sets up on the reuse toper section 10 slowly presses close to with the eardrum, be favorable to improving the security of operation.

As shown in fig. 3, the structure of the drug-loaded layer 5 matches the structure of the tube body 1. In this embodiment, the structure of the tube body 1 itself is completely matched with the shape of the external auditory canal, and the structure of the drug-loaded layer 5 is matched with the structure of the tube body 1. Can make medicine-carrying layer 5 laminate completely and body 1 like this to under the condition that body 1 stretched into the external auditory canal, medicine-carrying layer 5 also can match completely with the form of external auditory canal equally, help medicine-carrying layer 5 to go up the accurate of medicine and use medicine, improved the effectiveness that the postoperative was used medicine and is resumeed.

In one example, at least one of the drift diameter section 9 and the cone section 10 includes a plurality of tube sections 3.

For example, it is possible that the path section 9 comprises one pipe section 3, and the tapered section 10 comprises a plurality of pipe sections 3, to finally form the pipe body 1; or alternatively

The tapered section 10 may comprise one pipe section 3, and the path section 9 comprises a plurality of pipe sections 3, so as to finally form the pipe body 1; or

It is possible that both the drift section 9 and the cone section 10 comprise a plurality of pipe sections 3, eventually forming the tubular body 1.

It should be noted that, regardless of the pipe sections 3 of the tapered section 10 or the pipe sections 3 of the passage section 9, each pipe section 3 may be the same height or different heights. The plurality of pipe sections 3 constituting the tapered section 10 may use pipe sections 3 of the same height or different heights, and similarly, the plurality of pipe sections 3 constituting the path section 9 may use pipe sections 3 of the same height or different heights, which is not limited herein and can be selected by those skilled in the art according to actual needs.

For example, the axial dimension of the diameter section 9 formed by the plurality of pipe sections 3 is 14mm to 16mm. The radial dimension of the drift diameter section 9 formed by the plurality of pipe sections 3 is 8mm-15mm. The axial dimension of the conical section 10 consisting of a plurality of tube sections 3 is 12mm to 14mm. In the present embodiment, the plurality of tube segments 3 have the same axial dimension, and the tube segments 3 have an axial dimension of 2mm to 4mm. In the above size range, the size matching of the drift diameter section 9 and the conical section 10 can ensure that the tube body 1 is well attached to the external auditory canal, which is favorable for the good supporting function of the tube body 1. The axial dimensions of a plurality of pipeline sections 3 are the same, can make the first broken string 4 that exists on keeping body 1 distribute on body 1 evenly like this, have guaranteed body 1's support intensity, and then can form effective support to the external duct.

For example, the ratio of the axial dimensions of the drift section 9 to the conical section 10 is 5:3. and the drift diameter section 9 and the conical section 10 are each formed by a plurality of tube sections 3 of different axial dimensions. Under above-mentioned proportion, the cooperation of the size of latus rectum section 9 and toper section 10 can guarantee that body 1 and external auditory canal form carry out good laminating, are favorable to the good supporting role of body 1. The diameter section 9 and the conical section 10 are each formed by a plurality of tube sections 3 of different axial dimensions. The cutting selectivity of the tube body 1 can be improved, so that the tube body 1 can be well cut according to actual needs no matter the through-path section 9 or the conical section 10, and the tube body is suitable for the ear canal shapes of more different patients.

In one example, the tube body 1 is of unitary construction. The first pre-breaking line 4 is a groove along the circumference of the outer surface of the pipe body 1. A plurality of grooves are arranged on the pipe body 1. The plurality of grooves divide the pipe body 1 into a plurality of pipe sections 3.

For example, the pipe body 1 is of a unitary structure. Be provided with the recess of a plurality of circumference along body 1 surface on body 1, the recess is first line 4 that breaks in advance, and a plurality of recesses divide into a plurality of pipeline sections 3 with body 1. Can make the manufacture craft of body 1 simpler like this, only need set up the recess in the outside of body 1, alright in order to form first disconnected line 4 in advance, the user can be cut out along the track of first disconnected line 4 in advance, obtains suitable body 1 size.

The first pre-breaking line 4 is a groove along the circumference of the outer surface of the pipe body 1. Since the first pre-breaking line 4 is formed by a groove on the outer surface of the tubular body 1, the radial dimension of the tubular body 1 at the groove is smaller than that of the tubular body 1 at the non-groove position. The user is when tailorring, tailors along the recess and makes the pipe body of incision department realize with originally form the chamfer that mitigatees between the pipe body of not tailorring, can avoid the burr damage duct that incision department produced like this, has improved the security that external auditory canal support used.

The manner of providing the groove may be laser etching, or mold prefabrication, or other suitable manners, which are not limited herein and may be selected by those skilled in the art according to actual needs.

In one example, the tubular body 1 is a degradable material.

The degradable biological high molecular material is a material which is gradually degraded into low molecular weight compounds or monomers in a living body through hydrolysis, enzymolysis and other processes, and degradation products can be discharged out of the body or can be disappeared after participating in normal metabolism in the body.

The degradable material has good biocompatibility. The biocompatibility should include: tissue, blood and mechanical compatibility. The degradable biological material is generally subjected to material design and surface interface modification according to the environmental characteristics of a human body, so that the compatibility between an implant material and tissues can be effectively improved, and the due physical and mechanical properties of the material are ensured. The implanted material has stable and reliable physical and mechanical properties, is easy to process and form, is convenient for disinfection and sterilization, has no toxicity or heat source, does not cause cancers and teratogenesis, and the like. The degradation cycle of the material temporarily implanted into the body is controllable, degradation products are nontoxic monomers which can be absorbed or metabolized or degradation monomers of chain segment degradable high molecular materials are mostly small molecules which can be absorbed by the human body, the degradable biological ceramics can be degraded into particles, molecules or ions in the body, the particles, the molecules or the ions are used as raw materials by cells and gradually disappear, and the degradable metal materials can form an ionic state and then are absorbed and utilized by the human body.

For example, in the present embodiment, the material of the tube body 1 is a Polylactic acid (PLA), which is also called polylactide, and is a polyester polymerized by using lactic acid as a raw material.

The polylactic acid has good biocompatibility and absorbability. Polylactic acid can be hydrolyzed by acid or enzyme in human body to generate lactic acid. Lactic acid, a metabolite of cells, can be further metabolized by enzymes in the body to produce CO2 and H2O. Therefore, the polylactic acid is non-toxic and harmless to human bodies and has better biocompatibility and bioabsorbability. Polylactic acid can be used as a biomaterial to be implanted into a human body.

Polylactic acid has good physical processability. The polylactic acid is used as a thermoplastic high polymer material, has good plasticity and physical processing performance, higher melting point and crystallinity, good elasticity and flexibility and excellent thermal forming property. Polylactic acid materials can be molded by extrusion, drawing, injection blow molding, and the like, as well as polymer materials such as polypropylene (PP), polystyrene (PS), and polyphenylene oxide (PPO).

In this embodiment, the tube body 1 is made of polylactic acid, and due to its good biocompatibility and absorbability, it will not poison or reject human body on the premise of effectively supporting the external auditory canal. In addition, the polylactic acid material has good plasticity and physical processability, can easily prepare the initial form of the required pipe body 1 according to the requirement, can perform processing and etching on the pipe body 1, simplifies the production process flow and reduces the production cost.

Of course, the degradable material is not limited to polylactic acid, but may also be polycaprolactone, polyurethane, polyethylene glycol; or is of the natural type: proteins (collagen, fibrin, silk, etc.), polysaccharides (starch, alginate, chitin, hyaluronic acid derivatives, etc.), natural polyesters, etc. The material of the degradable material can be selected by those skilled in the art according to actual needs.

In one example, the drug-loaded layer 5 is an electrospun film, a flocked fabric, a non-woven fabric, a gauze, a plastic, a rubber, or a silicone.

For example, the drug-loaded layer 5 is an electrostatic spinning film, a flock cloth, a non-woven cloth, a gauze, a plastic, a rubber or a silica gel. The drug-loaded layer 5 is made of the materials, and can well bear the drugs by utilizing the porous structure on the surface of the materials.

In addition, above-mentioned material all has plasticity and compliance, and under the condition that body 1 stretched into external auditory canal, other positions in external auditory canal or the ear can not damaged by medicine carrying layer 5 at first to guarantee, has improved the security of operation. Wherein, the electrostatic spinning membrane material, the flock spraying cloth, the non-woven fabric and the gauze are porous materials. The porous material is capable of containing a drug. Plastics, rubber, silica gel and other materials need to be processed on the surface to form a porous structure so as to contain the medicine.

In addition, medicine carrying layer 5 can laminate with the external auditory canal form better under the supporting role of body 1, has improved the effective accuracy of using medicine.

The material has low cost, is nontoxic and harmless to human bodies, and is favorable for reducing the production cost of the drug-loaded layer 5.

In one example, the drug-loaded layer 5 is bonded, sprayed, dip coated or vapor deposited onto the outside of the body 1.

For example, medicine carrying layer 5 can be the bonding outside body 1, and the mode of bonding neither can destroy medicine carrying layer 5's self structure, can guarantee medicine carrying layer 5 and body 1's reliable connection moreover, and in addition, the mode of bonding also is convenient for operate, is favorable to reducing the degree of difficulty of production technology.

For example, the binder is racemic polylactic acid, levo-racemic polylactic acid, or polyvinylpyrrolidone.

The drug-loaded layer 5 can also be sprayed outside the tube body 1. The method specifically comprises the following steps: place body 1 in treating the device of spraying, scribble the medicine through ultrasonic atomization spraying and attach to body 1 surface, can set up medicine-carrying layer 5 outside body 1 through airing or drying. Medicine carrying layer 5 that the spraying formed like this can distribute in the body 1 outside uniformly, and then the porous structure on medicine carrying layer 5 can hold the medicine uniformly for it is accurate effective to use medicine.

In one example, a plurality of rows of through holes 2 are provided in the pipe body 1. The through holes 2 of each row are arranged along the axial direction of the tube body 1.

For example, a plurality of rows of through holes 2 are provided in the tubular body 1, and the through holes 2 in each row are arranged in the axial direction of the tubular body 1. Make through-hole 2 can set up dispersedly on whole body 1 like this, stretch into under the condition of external auditory canal at body 1, dispersed through-hole 2 can get into more air, and then make and keep dry environment in the external auditory canal, be favorable to preventing that the affected part is in moist state for a long time and causes further inflammatory ulcer problem.

In one example, a plurality of second pre-breaking lines 8 extending in the axial direction are provided on the outer surface of the pipe body 1.

For example, a plurality of second pre-cut lines 8 extending in the axial direction are provided on the outer surface of the pipe body 1. The user can cut out body 1 along the orbit of second line 8 of breaking in advance, and then changes body 1's radial dimension to the good effective support of duct form formation that is adapted to different patients.

The setting of second line 8 of breaking off in advance makes tailorring of body 1 light convenient, and can guarantee to tailor the remaining body 1 that the back obtained (need place in the inside body 1 of external auditory canal) and idle body 1 (do not need place in the inside body 1 of external auditory canal after tailorring) all keep complete body 1 form, the accuracy of tailorring has been improved, finally make and remain body 1 effective performance supporting role in the external auditory canal, idle body 1 still can regard as body 1 deposit simultaneously, the material cost is saved.

In one example, the tube body 1 is of unitary construction. The second pre-breaking line 8 is an axial groove along the outer surface of the pipe body 1.

For example, the pipe body 1 is of a unitary structure. The second pre-breaking line 8 is an axial groove along the outer surface of the pipe body 1. Can make the manufacture craft of body 1 simpler like this, only need set up the recess on the surface of body 1, alright in order to form the second line 8 that breaks in advance, the user can be cut out along the second track of breaking in advance line 8, obtains suitable body 1 size.

The second pre-breaking line 8 is an axial groove along the outer surface of the pipe body 1. Since the second pre-breaking line 8 is formed by a groove on the outer surface of the tubular body 1, the radial dimension of the tubular body 1 at the groove is smaller than the radial dimension of the tubular body 1 at the non-groove position. The user is when tailorring, tailors along the recess and makes the pipe body of incision department realize with originally form the chamfer that mitigatees between the pipe body of not tailorring, can avoid the burr damage duct that incision department produced like this, has improved the security that external auditory canal support used.

The manner of providing the groove may be laser etching, or mold prefabrication, or other suitable manners, which are not limited herein and may be selected by those skilled in the art according to actual needs.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A trimmable external ear canal support, comprising:

the pipe comprises a pipe body, wherein through holes arranged in an array are formed in the pipe body, the pipe body comprises a plurality of pipe sections arranged along the axial direction, the pipe sections are connected together, and a first pre-broken line is arranged between every two adjacent pipe sections; and

a drug-loaded layer, the drug-loaded layer sleeve is established outside the tube body, the outer surface of the drug-loaded layer is formed with a porous structure, the porous structure is configured to be used for accommodating drugs.

2. The trimmable external ear canal support of claim 1, wherein the tube body comprises a through-path section and a tapered section, the tapered section is connected with one end of the through-path section, the end of the through-path section opposite to the tapered section is formed with a first mouth, the end of the tapered section opposite to the through-path section is provided with a second mouth, the second mouth is obliquely arranged, the angle of the second mouth is matched with the inclination angle of a tympanic membrane, the second mouth is configured for supporting the tympanic membrane, and the structure of the drug-loaded layer is matched with that of the tube body.

3. The trimmable external ear canal support of claim 2, wherein at least one of the through-path section and the tapered section comprises a plurality of the tube segments.

4. The trimmable external ear canal support of claim 1, wherein the tube body is a unitary structure, the first predetermined line is a groove along a circumferential direction of an outer surface of the tube body, and a plurality of the grooves are provided on the tube body, the plurality of the grooves dividing the tube body into a plurality of the tube sections.

5. The trimmable external ear canal support of claim 1, wherein the tube is a degradable material.

6. The trimmable external ear canal support of any one of claims 1 to 5, wherein the drug-loaded layer is an electrospun film, a flocked cloth, a non-woven fabric, a gauze, a plastic, a rubber, or a silica gel.

7. The trimmable external ear canal stent of any one of claims 1-5, wherein the drug-loaded layer is bonded, sprayed, dip-coated, or vapor deposited outside the tube body.

8. The trimmable external ear canal support according to any one of claims 1 to 5, wherein a plurality of rows of the through holes are provided on the tube, the through holes of each row being arranged in an axial direction of the tube.

9. The trimmable external ear canal support according to any one of claims 1 to 5, wherein a plurality of second pre-cut lines extending in the axial direction are provided on the outer surface of the tube body.

10. The trimmable external ear canal support of claim 9, wherein the tube is of a unitary construction and the second line of severance is a groove axially along an outer surface of the tube.

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