CN215228878U - Dilator for ventricular connection part - Google Patents

Abstract

The utility model relates to a supporting dilator used in the narrow part of cerebrospinal fluid passage in the ventricle, such as midbrain aqueduct and interventricular hole, in particular to a dilator used in the ventricular junction, which comprises a dilator body made of elastic material, wherein the dilator body contracts under the action of external force and expands after the external force disappears; the upper portion of the expander body is an upper port portion, the lower portion of the expander body is a lower port portion, the diameter of the upper port portion is larger than that of the lower port portion, and the diameter of the expander body decreases progressively in an equidifferent mode or a non-equidifferent mode from the upper port portion to the lower port portion. The utility model can be placed under an endoscope or a surgical microscope through a special placing device, and the narrow part between ventricles of brain is supported and expanded through the expander body; preventing restenosis in conjunction with the release of an inflammatory-inhibiting drug layer attached to the dilator; reduce postoperative foreign body retention through the dilator body of bioabsorbable material.

Description

Dilator for ventricular connection part

Technical Field

The utility model relates to a narrow department easily takes place to intracerebroventricular cerebrospinal fluid passageway among neurology department's scope technique and the microsurgery, especially supports the technical field of expansion to intracerebroventricular aqueduct and interventricular hole, concretely relates to an expander for intracerebroventricular connecting portion.

Background

Hydrocephalus caused by the stenosis of the junction between ventricles of brain such as a midbrain aqueduct and an interventricular orifice is a common complication after neurological surgery such as cerebral hemorrhage, is an important factor harming postoperative rehabilitation of patients at present, and has high complication incidence rate. The pathological process of the narrow connection part between the ventricles is the inflammatory reaction of cells on the wall of the ventricles caused by cerebral hemorrhage and the like, and local stenosis or occlusion is caused. At present, no better prevention method exists, the existing treatment methods comprise ventricular puncture external drainage, ventricular floor fistulization, ventricular abdominal shunt and the like, and the treatment methods are all invasive or permanent implantation treatment.

The cerebral aqueduct forming operation has the advantages of removing the dependence of hydrocephalus patients on the shunt pipe, small operation wound and the like. But the restenosis rate of the aqueduct after the aqueduct forming is high and can reach 50 percent. The high restenosis rate after the formation of the aqueduct is due to the inflammatory reaction of the cells of the ventricular wall, which causes local stenosis or occlusion. At present, neurologists at home and abroad try to place a catheter after forming the aqueduct, but the existing catheter is difficult to place and easy to shift, and the reason is that the catheter does not have an effective fixing structure at the narrow connecting part between ventricles of brain and is easy to slide up and down. Meanwhile, the catheter needs to be permanently implanted and is a foreign body in the brain, which is easy to cause local inflammation and aggravate stenosis; the aperture of the conduit is small and easy to block.

The above-mentioned postoperative effect of treating the narrow junction between ventricles such as midbrain aqueduct and ventricular foramen is not ideal, and the applicant has tried to improve the above-mentioned postoperative effect by other means, for example, by using a dilator or the like to treat and prevent the narrow junction between ventricles. However, no stent of this type is available in the prior art, and most stents such as vascular stents are applied to blood vessels. The utility model discloses a degradable intravascular stent that intensity is high as that chinese utility model patent CN210447293U discloses, including support main part and sacculus main part, pore has been seted up to the even equidistance in inside of support main part, and pore inside settles and have the medicine, the surface connection of support main part has first tectorial membrane, and the internal surface mounting of support main part has the second tectorial membrane, the sacculus main part is settled in the inboard of second tectorial membrane, and the inside of sacculus main part is provided with the inner chamber, the interface has been seted up to the right-hand member of sacculus main part, and the inside of interface is fixed with the sealing plug. The venous blood vessel self-expanding stent disclosed in the Chinese utility model patent CN208404997U comprises a body, wherein the body is formed by cutting and shaping a nickel-titanium alloy tube; the body includes: the middle reticular support part comprises at least two annular arrangement structures which are sequentially connected along the circumferential direction or the direction with a certain inclination angle along the circumferential direction to form an S or inverted S-shaped wave shape, and the adjacent annular structures are connected through at least one connecting rod; the head parts are respectively arranged at the two ends of the middle reticular support part, the head parts comprise a head end support main body and at least one connecting structure used for connecting the head end main body and the middle reticular support part, and the head end support main body is a net ring formed by sequentially connecting rhombic basic units. Also like the local close net support of degradable that chinese utility model patent CN208989271U disclosed, include, well close net support part has two kinds of models of i type mesh support and ii type mesh support, has the sacculus at close inside fixed mounting of net support, the inside sacculus pipe that is provided with of sacculus. The working principle of the aforesaid patent is similar, all utilize the elasticity of support self to play the supporting role to the blood vessel. However, the aforesaid patent is not suitable for the treatment of the stenosis of the ventricular connection part, and firstly, the shape, the supporting force and the like are limited by the different physiological structures of the blood vessel and the ventricular connection part, and the patent cannot be applied to the treatment of the ventricular connection part, the diameter of the ventricular connection part is not the same diameter, but the diameter of the blood vessel of the same type is mostly the same diameter, the diameter of the catheter of the aforesaid patent is the same diameter, and the saccule is the same difference diameter; secondly, the intravascular stent needs to contain the components developed by X-ray because of being placed under the X-ray, the utility model discloses can be the preparation of bioabsorbable material, be suitable for the special environmental requirement in the nervous system.

In view of this, the utility model provides an expander that is used for midbrain aqueduct and interventricular hole specially supports the connecting portion between the ventricles of brain through the expander that sets up non-constant diameter to solve the problem of connecting portion restenosis, and utilize the non-constant diameter of expander to carry on spacingly in order to solve the problem that slides and shift.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an expander that is used for midbrain aqueduct and interventricular hole to solve the not enough that exists among the prior art, the to-be-solved technical problem of the utility model is realized through following technical scheme.

In a dilator for use with a midbrain aqueduct and an interventricular foramen, the improvement comprising: the dilator comprises a dilator body, wherein the dilator body is made of elastic materials, and the dilator body contracts under the action of external force and expands after the external force disappears; the upper portion of the expander body is an upper port portion, the lower portion of the expander body is a lower port portion, the diameter of the upper port portion is larger than that of the lower port portion, and the diameter of the expander body decreases progressively in an equidifferent mode or a non-equidifferent mode from the upper port portion to the lower port portion.

Preferably, the dilator body further comprises a contraction portion, the contraction portion is located on the dilator body and close to the upper port portion, and the diameter of the contraction portion is smaller than that of the upper port portion and larger than that of the lower port portion.

Preferably, the expander body is located the upper port portion inwards extends and forms an upper connecting portion, the expander body is located the lower port portion inwards extends and forms a lower connecting portion, a pipeline penetrates through between the upper connecting portion and the lower connecting portion, the pipeline is in sealing connection with the connecting portion of the upper connecting portion and the lower connecting portion, the end portion of the pipeline close to the lower connecting portion is a sealing end, the end portion of the pipeline close to the upper connecting portion is an open end, and the pipeline is located through holes are formed in the pipe wall inside the expander body.

Preferably, the open end of the pipeline is provided with a two-way valve.

Preferably, an elastic balloon is arranged inside the dilator body.

Preferably, the dilator body is made of elastic metal material.

Preferably, the dilator body is made of elastic rubber materials.

Preferably, the dilator body surface is coated with a drug layer to inhibit inflammatory reactions.

Preferably, the inner surface and the outer surface of the dilator body are both of a net structure, and corresponding meshes on the inner surface and the outer surface are communicated with each other.

Preferably, the dilator body is made of elastic absorbable materials.

The utility model discloses during the use, under neurology department scope or microscope, at first put into flexible seal wire, then put into the sheath pipe through the guide of flexible seal wire, the focus position department is arrived at to the foremost of sheath pipe, the utility model discloses an expander enters into focus department from the sheath pipe, utilizes the expander to focus department, and narrow connecting portion between ventricles such as midbrain aqueduct, interventricular hole, three ventricles flaccidity mouth are made to midbrain aqueduct, room, expand, support, realize that one-time operation can expand and last the purpose of supporting. The medicine layer for inhibiting inflammatory reaction is utilized to inhibit inflammatory attack and reduce the occurrence probability of restenosis; the dilator body made of absorbable material is utilized to reduce the problem of retention of foreign bodies in the body after operation.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model utilizes the elasticity of the dilator body to support the connecting part between ventricles of brain, in particular to support the narrow connecting parts such as the aqueduct of brain and the hole between ventricles, thereby reducing the occurrence probability of restenosis after operation;

the utility model utilizes the shape of the dilator body with big top and small bottom, and the upper port part is positioned at the upper port of the narrow connecting part while expanding the connecting part between ventricles of brain, thereby clamping the dilator body at the upper port of the narrow connecting part, solving the technical problems of difficult placement and easy displacement of the catheter in the prior art, and realizing effective positioning and effective fixation of the dilator;

the surface of the dilator body is coated with a medicine layer for inhibiting inflammatory reaction, such as a dexamethasone medicine layer, so that the occurrence of inflammation is inhibited, and the occurrence probability of postoperative restenosis is further reduced;

the utility model utilizes the contraction part to make the dilator body form a funnel shape, which is consistent with the flow direction of cerebrospinal fluid, thereby facilitating the positioning and fixing of the dilator body and the placing and fixing of the dilator;

the supporting force of the expander body is further enhanced by arranging the elastic balloon, the narrow connecting part can not be effectively supported by the elasticity of the expander body at the focus with serious illness, and the elastic balloon is used for inflating at the moment, so that the supporting force of the expander body is enhanced, and the narrow connecting part is effectively expanded;

the utility model can cover and support the connecting part between ventricles sufficiently through the dilator body with the reticular structure, thereby effectively dilating the narrow connecting part between ventricles;

seventhly the utility model discloses a set up absorbable expander body, for example polylactic acid, polyglycolic acid, polycaprolactone, polyether or polycarbonate material's expander body, utilize the absorbability of material itself for the expander body is biodegradable in the human body, thereby has solved the technical problem that prior art needs permanent implantation, and then has realized the effect that the postoperative is free from foreign matter to keep.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention in expanded configuration;

fig. 2 is a schematic structural view of an embodiment of the present invention during shrinkage;

FIG. 3 is a schematic view of another embodiment of the present invention in expanded configuration;

FIG. 4 is a schematic view of a further embodiment of the present invention in expanded configuration;

FIG. 5 is a schematic view of a further embodiment of the present invention in a contracted configuration;

FIG. 6 is a schematic view of a further embodiment of the present invention in expanded configuration;

the reference numbers in the drawings are, in order: 1. pipeline, 2, upper connecting portion, 3, upper port portion, 4, expander body, 5, lower port portion, 6, lower connecting portion, 7, constriction portion, 8, elasticity sacculus.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1:

referring to fig. 1 and 2, a dilator for a midbrain aqueduct and an interventricular orifice is improved in that: the dilator comprises a dilator body 4, wherein the dilator body 4 is made of elastic materials, and the dilator body 4 contracts under the action of external force and expands after the external force disappears; the upper portion of the expander body 4 is an upper port portion 3, the lower portion of the expander body 4 is a lower port portion 5, the diameter of the upper port portion 3 is larger than that of the lower port portion 5, and the diameter of the expander body 4 decreases from the upper port portion 3 to the lower port portion 5 in an equidifferent or non-equidifferent mode.

In the embodiment, the elasticity of the dilator body 4 is utilized to support the connecting part between ventricles of brain, particularly to support the narrow connecting parts such as the aqueduct of brain and the hole between ventricles, thereby reducing the occurrence probability of restenosis after operation; utilize the big-end-up shape of expander body 4, when expanding connecting portion between ventricles of brain, last port department 3 is located the upper mouth department of narrow connecting portion to place expander body 4 card in the upper mouth department of narrow connecting portion, solved prior art and placed the technical problem that difficulty, easy aversion, realized effective location and effective fixed of expander.

Further, the surface of the dilator body 4 is coated with a drug layer for inhibiting inflammatory reaction; further, the drug layer is a dexamethasone drug layer.

In this embodiment, the surface of the dilator body 4 is coated with a drug layer for inhibiting inflammatory reaction, such as a dexamethasone drug layer, so as to inhibit inflammation and proliferation of ependymal cells, and further reduce the occurrence probability of postoperative restenosis.

Example 2:

in addition to embodiment 1, referring to fig. 3, the dilator body 4 further includes a constricted portion 7, the constricted portion 7 is located on the dilator body 4 at a position close to the upper port 3, and the diameter of the constricted portion 7 is smaller than the diameter of the upper port 3 and larger than the diameter of the lower port 5.

In this embodiment, the dilator body is made to form a funnel shape by using the contraction portion 7, so that the dilator body is conveniently positioned and fixed, and the dilator is conveniently placed and fixed.

Example 3:

on the basis of embodiment 1, referring to fig. 4 and 5, the expander body 4 extends inward at the upper port portion 3 to form an upper connecting portion 2, the expander body 4 extends inward at the lower port portion 5 to form a lower connecting portion 6, a pipeline 1 is arranged between the upper connecting portion 2 and the lower connecting portion 6, the pipeline 1 is connected with the connecting portion of the upper connecting portion and the lower connecting portion in a sealing manner, the end portion of the pipeline 1 adjacent to the lower connecting portion 6 is a sealing end, the end portion adjacent to the upper connecting portion 2 is an opening end, and a through hole is formed in the pipe wall of the pipeline 1 inside the expander body 4.

Further, a two-way valve is arranged at the opening end of the pipeline 1.

In the embodiment, the expander body 4 is inflated or filled with liquid through the pipeline 1, and after the expander body 4 is expanded to a desired size, the two-way valve at the opening end of the pipeline is closed, so that air leakage or liquid leakage of the expander body 4 is prevented; after the expansion is finished, the two-way valve is opened, gas or liquid is pumped out, and the expander body 4 is retracted and taken out.

Further, the dilator body 4 is made of elastic rubber material.

The embodiment forms a saccule-like dilator with big top and small bottom, which dilates narrow connecting parts between ventricles of brain such as aqueduct and hole between ventricles, and the upper port part 3 is positioned at the upper port of the narrow connecting parts, thereby facilitating the implantation and fixation of the embodiment and preventing the embodiment from sliding and shifting.

Example 4:

in addition to embodiment 1, referring to fig. 6, the dilator body 4 is provided with an elastic balloon 8 inside.

In this embodiment, the supporting force of this embodiment is further enhanced by providing the elastic balloon 8. The embodiment is directed at serious illness disease, and when the elastic force of the expander body 4 is only relied on to effectively support and expand the narrow connecting part between ventricles of brain, the elastic balloon is utilized to inflate, so that the supporting force of the embodiment is enhanced, and the narrow connecting part between ventricles of brain is effectively expanded.

Example 5:

on the basis of the embodiment 1, 2 or 4, the expander body 4 is made of elastic metal material.

In this embodiment, the dilator body 4 is made of an elastic metal material, so that the dilator has sufficient supporting strength, and is suitable for patients with serious disease, and the focus of the dilator can be effectively supported and dilated only by strong supporting force.

Example 6:

on the basis of the embodiment 1, 2 or 4, the dilator body 4 is made of elastic absorbable material.

Further, the dilator body 4 is made of high polymer materials such as polylactic acid, polyglycolic acid, polycaprolactone, polyether or polycarbonate.

In this embodiment, a dilator body 4 made of a material such as polylactic acid or polyglycolic acid is used, so that this embodiment forms an absorbable elution dilator. Aiming at the patients with high susceptibility to restenosis, the embodiment can be adopted without influencing the secondary operation and treatment.

Example 7:

on the basis of any one of embodiments 1, 2 and 4-6, the inner surface and the outer surface of the dilator body 4 are both of a net structure, and corresponding meshes on the inner surface and the outer surface are mutually communicated.

In this embodiment, through network structure's expander body for this embodiment forms dense net expander, carries out effectual cover and support to focus department, thereby effectively expands narrow connecting portion between the ventricles such as midbrain aqueduct, interventricular hole, three ventricles fistulation mouth and other fistulation mouths.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or otherwise described herein.

Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dilator for a ventricular junction, comprising: the dilator comprises a dilator body (4), wherein the dilator body (4) is made of elastic materials, and the dilator body (4) contracts under the action of external force and expands after the external force disappears; the upper portion of the expander body (4) is provided with an upper port portion (3), the lower portion of the expander body (4) is provided with a lower port portion (5), the diameter of the upper port portion (3) is larger than that of the lower port portion (5), and the diameter of the expander body (4) decreases in an equidifferent mode or a non-equidifferent mode from the upper port portion (3) to the lower port portion (5).

2. A dilator according to claim 1, wherein: the dilator body (4) further comprises a contraction portion (7), the contraction portion (7) is located at a position, close to the upper port portion (3), on the dilator body (4), and the diameter of the contraction portion (7) is smaller than that of the upper port portion (3) and larger than that of the lower port portion (5).

3. A dilator according to claim 1, wherein: expander body (4) in upper port portion (3) department inwards extends and forms connecting portion (2), expander body (4) in lower port portion (5) department inwards extends and forms connecting portion (6) down, go up connecting portion (2) with wear to be equipped with pipeline (1) down between connecting portion (6), pipeline (1) with the junction sealing connection of upper and lower connecting portion, pipeline (1) are neighbouring the tip of lower connecting portion (6) is sealed end, neighbouring the tip of upper connecting portion (2) is the open end, pipeline (1) are located be equipped with the through-hole on the inside pipe wall of expander body (4).

4. A dilator according to claim 3, wherein: the open end of the pipeline (1) is provided with a two-way valve.

5. A dilator according to claim 1, wherein: an elastic balloon (8) is arranged inside the dilator body (4).

6. A dilator according to claim 1, 2 or 5, wherein: the expander body (4) is made of elastic metal materials.

7. A dilator according to claim 3 or 4, wherein: the expander body (4) is made of elastic rubber materials.

8. A dilator according to any of claims 1 to 5, wherein: the surface of the dilator body (4) is coated with a drug layer for inhibiting inflammatory reaction.

9. A dilator according to claim 1, 2 or 5, wherein: the inner surface and the outer surface of the expander body (4) are both of a net structure, and corresponding meshes on the inner surface and the outer surface are communicated with each other.

10. A dilator according to claim 1, 2 or 5, wherein: the dilator body (4) is made of elastic absorbable materials.

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