CN113476722A

CN113476722A - Ureteral stent

Info

Publication number: CN113476722A
Application number: CN202110869176.0A
Authority: CN
Inventors: 宋宁宏; 秦超; 王仪春; 任筱寒; 叶俊; 季承建; 朱正; 陈杏林; 丛戎; 王帅; 张玺
Original assignee: Kizilsu Kirgiz Autonomous Prefecture People's Hospital; Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Current assignee: Kizilsu Kirgiz Autonomous Prefecture People's Hospital; Jiangsu Province Hospital First Affiliated Hospital With Nanjing Medical University
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-10-08

Abstract

The invention discloses a ureteral stent which comprises a gas conduit, an air bag, a degradable stent and a ureter. The invention provides a ureter bracket, which is characterized in that an air bag communicated with an air conduit is arranged, and a degradable bracket is sleeved on the outer surface of the air bag, so that the ureter bracket can provide a powerful support for the ureter in a short period after the treatment of urinary tract obstruction, can be degraded along with the remodeling of the ureter, the operation of replacing and extracting the ureter in the prior art is eliminated, the problems that the ureter bracket is difficult to extract the ureter and needs to be subjected to the operation of hospitalization due to the formation of a ureter surface capsid after the existing ureter bracket is placed for a long time are effectively avoided, the stimulation symptoms of a double J-shaped structure to the kidney and the bladder at any moment are eliminated, the discomfort of the waist and the back of a patient during the daily activities is eliminated, the injury to the urethra and the bladder of the patient is effectively avoided without the improvement of replacing and extracting the ureter, and the comfort of the patient during the postoperative rehabilitation is obviously improved.

Description

Ureteral stent

Technical Field

The invention relates to the technical field of medical consumables, in particular to a ureteral stent.

Background

Ureteral stenosis is a clinically common obstructive disease of the urinary system. At present, the ureteral stent applied clinically is mostly an undegradable ureteral stent with a double J structure, and has certain defects: 1. partial patients need to place the ureteral stent for a long time, and the existing ureteral stent often causes the formation of a surface capsid of the ureter after being placed for a long time (more than 3 months), so that the ureteral stent is difficult to pull out, and the ureteral stent needs to be pulled out in a hospitalization operation; 2. the existing ureteral stent tube is respectively arranged in the kidney and the bladder due to the double J-shaped structure, so that most patients have bladder irritation symptoms or waist and back discomfort during daily activities of the patients; 3. the existing ureteral stent needs to be subjected to cystoscope extubation, and a part of patients need to be periodically replaced with new ureteral stent under the cystoscope, and the urethra and the bladder of the patients are damaged by the operation of replacing and extubating the ureteral stent. Therefore, the development of the novel ureteral stent which does not need to replace the catheter and pull out the catheter and does not stimulate the kidney and bladder patients and has better comfort has better clinical application value.

Disclosure of Invention

The invention aims to provide a ureteral stent, which is improved from the existing ureteral stent and has the advantages of no need of replacing a catheter and less stimulation to the kidney and the bladder of a patient compared with the existing ureteral stent.

In order to realize the purpose, the invention adopts the following technical scheme:

a ureteral stent comprises a gas conduit, wherein the gas conduit is a hollow pipe, one end of the pipe is movably sleeved with a gas inlet structure, the other end of the pipe is communicated with an air bag, the outer wall of the air bag is movably sleeved with a degradable stent, and the degradable stent is of a tubular structure;

the gasbag is the flat form of no gas futilely, gas conduit stretches into the ureter, drives the gasbag and gets into the ureter cavity, the gasbag is aerifyd through inlet structure, along with the inflation of gasbag, the internal diameter of degradation type support lasts to expand, and its outer wall is close to the ureter inner wall that closes in the urinary tract after obstruction, the gasbag passes through the gas conduit gassing, the gasbag is the flat form of no gas futilely, and the inner wall contactless of its outer wall and ureter, gas conduit takes out from the ureter, and it is external to drive the gasbag and take out to the human body, degradation type support takes place to degrade along with the remolding of ureter postoperative.

Preferably, neither the gas conduit nor the balloon contact the kidney or the bladder site.

Preferably, the degradable stent is a reticular cylindrical structure with openings at two ends.

Preferably, the degradable stent is made of polylactic acid, and is degraded into water and carbon dioxide along with the remodeling of the ureter.

Preferably, the air bag is provided with an air port for communicating the air conduit with the cavity of the air bag, and the air port is provided with an airtight core structure.

Preferably, the airtight core structure is made by a plurality of soft plastic separation blades, and the annular array of a plurality of soft plastic separation blades is arranged on the inner wall of the air port and forms a compact sealing ring.

Preferably, the air intake structure is a balloon expandable pressure pump.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the air bag communicated with the gas conduit is arranged, the outer surface of the air bag is sleeved with the degradable stent, no gas exists in the air bag, the air bag is in a shriveled small-caliber state, then the gas conduit is extended into the ureter, the air bag is pushed into the ureter cavity, then the air bag is inflated through the air inlet structure, the inner diameter of the degradable stent is continuously expanded along with the expansion of the air bag until the outer wall of the degradable stent is tightly attached to the inner wall of the ureter after the urinary tract obstruction, then the air bag is deflated through the gas conduit, so that the air bag is in the shriveled small-caliber state again, the outer wall of the air bag is not contacted with the inner wall of the ureter at the moment, finally the gas conduit is taken out of the ureter, the air bag is also taken out of a human body, the construction work of the ureter stent is finished, and finally the degradable stent is degraded along with the remodeling after the ureter, so that the degradable stent can provide powerful support for the ureter in a short time after the urinary tract obstruction treatment, the ureter stent is degraded along with the remodeling of the ureter, the operation of replacing and extracting the ureter in the prior art is eliminated, the problems that the ureter stent is difficult to extract and the ureter needs to be extracted in the hospitalization operation due to the formation of the surface capsid of the ureter after the ureter stent is placed for a long time are effectively solved, the stimulation symptoms of the double J-shaped structure to the kidney and the bladder at any moment are eliminated, the discomfort of the waist and the back of a patient during the daily activities is eliminated, the injury to the urethra and the bladder of the patient is effectively avoided without the improvement of replacing and extracting the ureter, and the comfort of the patient during the postoperative rehabilitation is obviously improved;

2. the air bag comprises an airtight core structure, the balloon expansion pressure pump is used as an air inlet structure, the air inlet structure is not required to be fixed on the air guide pipe constantly after air is injected into the air bag by the balloon expansion pressure pump, the annular array of soft plastic baffles can isolate the exchange of the internal gas and the external gas of the air bag, when the air bag is required to be taken out, the air is pumped from the air bag by the balloon expansion pressure pump, the passive soft airtight core structure can effectively isolate the exchange of the internal gas and the external gas of the air bag without interference, when positive pressure or negative pressure applies force to the air bag, the passage of an air port can be opened, and the workload that medical staff need to block the port of the air guide pipe constantly can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the degradable stent structure of the present invention;

FIG. 3 is a schematic view of the airbag of the present invention in its inflated configuration;

FIG. 4 is a schematic representation of the uninflated bladder of the present invention.

In the figure: 1. gas conduit, 2, air bag, 3, degradation type support, 4, ureter.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example (b): referring to fig. 1-4, a ureteral stent comprises a gas conduit 1, wherein the gas conduit 1 is a hollow tube, one end of the tube is movably sleeved with a gas inlet structure, the other end of the tube is communicated with a gas bag 2, the outer wall of the gas bag 2 is movably sleeved with a degradable stent 3, and the degradable stent 3 is of a tubular structure;

the gasbag 2 is the flat form of no gas futilely, gas conduit 1 stretches into ureter 4, drives gasbag 2 and gets into ureter 4 cavity, gasbag 2 is aerifyd through inlet structure, along with the inflation of gasbag 2, the internal diameter of degradation type support 3 lasts to expand, and its outer wall is close to the 4 inner walls of ureter that laminate in the urinary tract obstruction postoperative, gasbag 2 is through the 1 gassing of gas conduit, gasbag 2 is the flat form of no gas futilely, and its outer wall and ureter 4's inner wall contactless, take out in gas conduit 1 is from ureter 4, drive gasbag 2 and take out outside the human body, degradation type support 3 takes place to degrade along the remolding of ureter 4 postoperative.

The gas conduit 1 and the air bag 2 are not in contact with the kidney and the bladder; the degradable bracket 3 is of a net-shaped cylindrical structure with openings at two ends; the degradable stent 3 is made of polylactic acid and is degraded into water and carbon dioxide along with the remodeling of the ureter 4; the air bag 2 is provided with an air port for communicating the air conduit 1 with the cavity of the air bag 2, and the air port is provided with an airtight core structure; the airtight core structure is made of a plurality of soft plastic blocking pieces which are annularly arrayed on the inner wall of the air port and form a compact sealing ring; the air inlet structure is a balloon dilatation pressure pump.

When the invention is used, firstly, the invention opens the air bag 2 communicated with the air conduit 1, and sleeves the outer surface of the air bag 2 with the degradable bracket 3, at the moment, no air exists in the air bag 2, and the air bag is in a shriveled small-caliber state, then the air conduit 1 extends into the ureter 4, pushes the air bag 2 to enter the cavity of the ureter 4, then the air bag 2 inflates through the air inlet structure, the inner diameter of the degradable bracket 3 continuously expands along with the expansion of the air bag 2 until the outer wall of the degradable bracket is tightly attached to the inner wall of the ureter 4 after the urinary tract obstruction, then the air bag 2 deflates through the air conduit 1, so that the air bag 2 is in the shriveled small-caliber state again, at the moment, the outer wall of the air bag 2 is not contacted with the inner wall of the ureter 4, finally, the air conduit 1 is taken out of the ureter 4, the air bag 2 is also pulled out of the human body, and the construction work of the ureter bracket is completed, finally, the degradable stent 3 is degraded along with the remodeling of the ureter 4 after the operation, the invention not only can provide a powerful support for the ureter 4 in a short period after the treatment of the urinary obstruction and degrade along with the remodeling of the ureter 4, eliminates the operation of replacing the ureter and extracting the ureter in the prior art, effectively avoids the problems that the ureter stent is difficult to extract the ureter and the ureter needs to be subjected to the operation of hospitalization due to the formation of the surface capsid of the ureter 4 after the existing ureter stent is placed for a long time, but also eliminates the stimulation symptoms of the kidney and the bladder at any moment by the double J-shaped structure, eliminates the discomfort of the waist and the back of a patient during the daily activity, effectively avoids the damage to the urethra and the bladder of the patient without the improvement of replacing the ureter and also obviously improves the comfort of the postoperative rehabilitation period of the patient.

The air-tight core structure is contained, the balloon expansion pressure pump is used as an air inlet structure, when the balloon expansion pressure pump is used for injecting air into the air bag 2, the air inlet structure does not need to be fixed on the air guide pipe 1 all the time, the annular array of soft plastic baffles can isolate the exchange of the internal air and the external air of the air bag 2, when the air bag 2 needs to be taken out, the air is extracted from the air bag 2 through the balloon expansion pressure pump, the passive soft air-tight core structure can effectively isolate the exchange of the internal air and the external air of the air bag 2 without interference, when positive pressure or negative pressure applies force to the passive soft air-tight core structure, the channel of an air port can be opened, and the workload that medical staff need to block the port of the air guide pipe 1 all the time can be reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A ureteral stent, characterized in that: the gas guide pipe comprises a gas guide pipe (1), wherein the gas guide pipe (1) is a hollow pipe, one end of the pipe is movably sleeved with a gas inlet structure, the other end of the pipe is communicated with an air bag (2), the outer wall of the air bag (2) is movably sleeved with a degradable support (3), and the degradable support (3) is of a tubular structure;

gasbag (2) are the flat form of no gas futilely, gas conduit (1) stretches into ureter (4), drives gasbag (2) and gets into ureter (4) cavity, gasbag (2) are aerifyd through inlet structure, along with the inflation of gasbag (2), the internal diameter of degradation type support (3) lasts to be enlarged, and its outer wall is the ureter (4) inner wall of the tight laminating in the uropoiesis postoperative, gasbag (2) are deflated through gas conduit (1), gasbag (2) are the flat form of no gas futilely, and its outer wall does not have the contact with the inner wall of ureter (4), take out in gas conduit (1) from ureter (4), drive gasbag (2) and take out outside the human body, degradation type support (3) take place to degrade along with the remolding of ureter (4) postoperative.

2. A ureteral stent according to claim 1, wherein: the gas conduit (1) and the air bag (2) are not in contact with the kidney and the bladder.

3. A ureteral stent according to claim 1, wherein: the degradable support (3) is of a net-shaped cylindrical structure with openings at two ends.

4. A ureteral stent according to claim 1, wherein: the degradable stent (3) is made of polylactic acid and is degraded into water and carbon dioxide along with the remodeling of the ureter (4).

5. A ureteral stent according to claim 1, wherein: the air bag (2) is provided with an air port for communicating the air conduit (1) with the cavity of the air bag (2), and the air port is provided with an airtight core structure.

6. A ureteral stent according to claim 5, wherein: the airtight core structure is made of a plurality of soft plastic blocking pieces which are arrayed on the inner wall of the air port in an annular mode to form a compact sealing ring.

7. A ureteral stent according to claim 5, wherein: the air inlet structure is a balloon dilatation pressure pump.