CN221771251U

CN221771251U - Ureteral dilatation balloon catheter

Info

Publication number: CN221771251U
Application number: CN202322972310.7U
Authority: CN
Inventors: 刘慕竹; 袁明; 胡浪; 贺卓; 傅勇; 唐睿
Original assignee: HUNAN EVD MEDICAL DEVICE CO Ltd
Current assignee: HUNAN EVD MEDICAL DEVICE CO Ltd
Priority date: 2023-11-03
Filing date: 2023-11-03
Publication date: 2024-09-27
Anticipated expiration: 2033-11-03

Abstract

The utility model provides a ureter dilating balloon catheter which comprises a catheter body, wherein the distal end of the catheter body is provided with a catheter head end, the catheter body is provided with a balloon, the distal end of the balloon is connected with the catheter head end, the proximal end of the catheter body is provided with a joint part, the whole body of the catheter wall of the catheter body is provided with cutting grooves, and the cutting grooves are spirally distributed. The embodiment of the utility model can be inserted into a narrow tube body or a cavity body which needs to be expanded in a human body through an instrument channel of an endoscope without a guide wire, so that the operation is simpler, the radial size of a catheter is reduced, the balloon is directly connected to the tube body without the guide wire for guiding, and meanwhile, positioning through X rays is not needed, the visualization operation is realized, the better pushing performance is expected to be presented, and the risk of damaging a ureter in the pushing process is reduced.

Description

Ureter expansion sacculus pipe

Technical Field

The utility model relates to the technical field of interventional medical instruments, in particular to a ureteral dilatation balloon catheter.

Background

Ureteral stenosis is one of the common diseases of the urinary system, and means that the ureteral lumen is partially or fully narrowed and urine drainage is limited due to various reasons except tumor factors. Although the continuity of the lumen is not interrupted, it has caused upper urinary tract obstruction, hydronephrosis to varying degrees, possibly causing pain in the renal region and upper urinary tract infection, and serious cases causing impairment or loss of renal function.

Treatment means for benign ureteral stenosis comprise endoluminal treatment, laparoscopic surgery and open surgery treatment, and the traditional open surgery has been gradually replaced by minimally invasive surgery at present due to the defects of large trauma, long hospitalization time, difficult reoperation after recurrence and the like.

With the development of endoscopic surgery and the continuous perfection of equipment conditions, endoluminal treatment of ureteral stenosis has become a major means, including ureteral stenting and dilatation, ureteral balloon dilatation, endoureteral incision, ureteral memory metal stent implantation and other surgical modes.

In recent years, ureteral saccule dilating treatment of ureteral stenosis has been widely applied to clinic, and has the advantages of high safety, small wound, no incision, almost no bleeding and the like. The most common initial treatment for benign ureteral stenosis is balloon dilation, which has the advantages of less injury to the ureter, short hospitalization time, quick postoperative recovery, difficult ilivascular injury and the like compared with the traditional operation. The balloon dilatation principle is that the fibrous scar of the narrow part is broken through the dilatation of the balloon catheter, and the inner diameter of the narrow part is increased, so that the ureter is recanalized. But the balloon dilation is generally operated under the X-ray positioning, the development of the ureter balloon dilation is limited by the requirement of image equipment, and the balloon dilation is harmful to the physical health of an operating doctor and a patient under X-ray perspective, and the dilation pressure and effect can only be judged according to the experience of an operator, so that the method is lack of scientificity.

In addition, catheters in the prior art generally use plastic materials such as PEEK, nylon, and polyalkenamine, which have risks of breakage during surgery, and have poor pushability, which require support and guidance through various guide wires. Plastic materials such as PEEK, nylon, polyalkenamine and the like have poor supporting property than metal materials, the wall thickness and the outer diameter can be designed to be larger, the outer diameter of the catheter is large before the balloon is filled, and the trafficability of the balloon catheter in an endoscope is affected.

Disclosure of Invention

In view of this, the present utility model aims to provide a ureteral dilation balloon catheter which solves the problems of poor push-through performance of the instruments and the need for positioning by X-rays during the passage in the prior art.

An aspect of the embodiment of the utility model provides a ureter dilating balloon catheter, which comprises a catheter body, wherein a catheter head end is arranged at the distal end of the catheter body, a balloon is arranged on the catheter body, the distal end of the balloon is connected with the catheter head end, a joint part is arranged at the proximal end of the catheter body, cutting grooves are formed in the whole body of the catheter wall of the catheter body, and the cutting grooves are spirally distributed.

In some embodiments, the cutting slot extends from the junction of the balloon and the catheter head end along the length of the tube toward the proximal end of the tube, the length of the cutting slot being greater than the length of the balloon.

In some embodiments, the helical pitch of the cutting flutes varies from small to large along the length of the tube in a direction from the distal end to the proximal end of the tube.

In some embodiments, the catheter tip is made of nickel titanium alloy or stainless steel welded spring, coated with polyurethane or polyamide or block polyamide.

In some embodiments, a surface of the catheter tip is provided with a coating.

In some embodiments, the catheter head end tapers in diameter from a location where the balloon is connected to the catheter head end to a location distal to the catheter head end, the distal end of the catheter head end being configured as a hemisphere or sphere.

In some embodiments, a developing ring is disposed inside the balloon.

In some embodiments, at least one liquid injection hole is formed at the joint of the tube body and the balloon, and the shape of the liquid injection hole is round.

In some embodiments, when the number of the liquid injection holes is multiple, the liquid injection holes are uniformly distributed in a straight line or a spiral shape at the joint of the tube body and the balloon.

In some embodiments, a spring layer is disposed on a surface of the proximal end of the tube, the spring layer being disposed in a coiled manner on the tube surface and aligned along the length of the tube.

The embodiment of the utility model can be inserted into a narrow tube body or a cavity body which needs to be expanded in a human body through an instrument channel of an endoscope without a guide wire, so that the operation is simpler, the radial size of a catheter is reduced, the balloon is directly connected to the tube body without the guide wire for guiding, and meanwhile, positioning through X rays is not needed, the visualization operation is realized, the better pushing performance is expected to be presented, and the risk of damaging a ureter in the pushing process is reduced.

Drawings

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method. The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a schematic structural view of a ureteral dilation balloon catheter of the present utility model;

fig. 2 is an enlarged schematic view of a portion of a ureteral dilation balloon catheter of the present utility model.

Wherein the above figures include the following reference numerals:

1-a catheter head end; 2-balloon; 3-a tube body; 4-joint part; 5-developing ring; 6-cutting grooves; 7-a liquid injection hole; 8-spring layer.

Detailed Description

Hereinafter, specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings, but not limiting the utility model.

It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of the utility model will occur to persons of ordinary skill in the art.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with a general description of the utility model given above, and the detailed description of the embodiments given below, serve to explain the principles of the utility model.

These and other characteristics of the utility model will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.

It is also to be understood that, although the utility model has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the utility model, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present utility model will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present utility model will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the utility model, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the utility model in unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present utility model in virtually any appropriately detailed structure.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the utility model.

The embodiment of the utility model provides a ureteral dilatation balloon catheter, which is used for endoluminal dilatation of a ureter stenosis in a human body, as shown in fig. 1 and 2, wherein fig. 1 shows a structural schematic diagram of the ureteral dilatation balloon catheter, fig. 1 shows an enlarged schematic diagram of the ureteral dilatation balloon catheter, the ureteral dilatation balloon catheter comprises a tubular body 3, the tubular body 3 is in a cylindrical tubular shape, the inside of the tubular body is in a single-cavity structure, the tubular body 3 is made of nickel-titanium alloy or stainless steel, the material can have better supporting and guiding effects, and the outer diameter of the tubular body 3 can be smaller, so that the passing performance of the ureteral dilatation balloon catheter is improved. Specifically, the outer diameter of the tube body 3 herein may be set to 0.4mm to 2mm.

The distal end of the tube body 3 is provided with a catheter head end 1, the tube body 3 is provided with a balloon 2, and the distal end of the balloon 2 is connected with the catheter head end 1; further, a joint portion 4 is provided at the proximal end of the tube body 3, and the joint portion 4 can be connected to an external device such as a pressure pump by a three-way valve, a two-way valve, or the like so as to fill the balloon 2 with liquid.

Specifically, the cavity of the tube 3 is in communication with the balloon 2 so as to be able to fill the balloon 2 with liquid, and the balloon 2 in this embodiment is made of polyurethane or polyamide blocks. The balloon 2 expands after filling with liquid, the diameter of the balloon 2 after expansion is in the range of 3-10mm, and the length thereof is in the range of 30-180 mm.

Further, the catheter head 1 of the catheter body 3 is made of nickel-titanium alloy or stainless steel coated polyurethane or polyamide or block polyamide, and the catheter head 1 has low hardness and good bending performance. Specifically, the catheter head end 1 is made of nickel-titanium alloy or stainless steel welded spring, and then coated with polyurethane or polyamide or block polyamide.

The strength characteristics of the materials such as stainless steel or nickel-titanium alloy adopted in the ureteral dilatation balloon catheter are that the ureteral dilatation balloon catheter does not need to be guided by a guide wire, namely a guide wire channel is not required to be arranged in the tube body 3 of the ureteral dilatation balloon catheter, the diameter of the tube body 3 is greatly reduced, and therefore the ureteral dilatation balloon catheter can directly reach a designated position under an endoscope through an endoscope working channel without being positioned by X rays, and the operation is simpler. The material of the tube 3 where the balloon 2 is located is identical to that of the tube 3 at other positions, so that the balloon 2 is uniformly expanded and is not easy to bend and deform when being filled.

Further, the surface of the catheter head end 1 is provided with a coating layer, so that when a user puts the catheter head end 1 into a human body, the catheter head end 1 can be put into the human body more smoothly through the coating layer, and the damage to the ureter caused by the catheter head end 1 is avoided. The coating layer is made of soft materials.

Further, the catheter head 1 has a tapered structure, specifically, the catheter head 1 gradually decreases in diameter from a position where the balloon 2 is connected to the catheter head 1 to a distal position of the catheter head 1, and the distal end of the catheter head 1 is particularly configured as a hemispherical or spherical shape. In this way, the diameter of the catheter head end 1 is changed, and the distal end of the catheter head end 1 is formed into a hemispherical or spherical shape, and in addition, the catheter head end 1 is softer and the surface of the catheter head end is wrapped with a coating layer, so that the catheter head end 1 is placed more smoothly, discomfort of a patient during operation is greatly reduced, and the catheter head end 1 is prevented from damaging a ureter.

Further, the developing ring 5 is arranged on the inner side of the balloon 2, and the position of the balloon 2 in the ureter of a patient can be conveniently observed on a perspective device in real time when necessary through the developing ring 5, so that the accurate expansion of the balloon 2 in the ureter is facilitated.

In order to facilitate filling the balloon 2 with liquid, at least one liquid injection hole 7 is provided at the connection between the tube 3 and the balloon 2, wherein the liquid injection hole 7 is circular, and in particular, when the number of the liquid injection holes 7 is plural, the liquid injection holes 7 are uniformly distributed in a straight line or spiral shape at the connection between the tube 3 and the balloon 2.

Further, a spring layer 8 is arranged on the surface of the proximal end of the tube body 3, the spring layer 8 is arranged on the surface of the tube body 3 in a winding manner and is arranged along the length direction of the tube body 3, and the push performance of the ureter dilatation balloon catheter is better by arranging the spring layer on the surface of the tube body 3.

Further, the connection between the balloon 2 and the tube 3 is provided with cutting grooves 6 around the tube wall of the tube 3, the cutting grooves 6 are spirally distributed, specifically, in the longitudinal direction along the tube 3, the cutting grooves 6 extend from the connection between the balloon 2 and the catheter head end 1 to the proximal end of the tube 3, and the distribution length of the cutting grooves 6 is greater than the length of the balloon 2, so that the balloon 2 can wrap part of the cutting grooves 6. Preferably, the length of the cutting groove 6 along the length direction of the tube body 3 is 10-100mm greater than the length of the balloon 2.

Further, the helical pitch of the cutting groove 6 varies from small to large along the length direction of the tube body 3 from the distal end to the proximal end of the tube body 3, so that the tube body 3 achieves a gradual transition from the soft end to the hard end.

The tube body 3 is made of stainless steel or nickel-titanium alloy and other materials, the bending performance of the tube body 3 is enhanced through the structure with the cutting groove 6, meanwhile, the tube body 3 is guaranteed to have durability and shape retaining capacity, the functions of being softer at the distal end of the tube body 3 and supporting the proximal end of the tube body 3 are achieved, transition of the tube body 3 is smooth through gradual change spiral distribution of the cutting groove 6 in the middle portion of the tube body 3, and force transmission is even when the ureter expansion balloon catheter is pushed or retracted in the conveying process.

The using method of the ureteral dilation balloon catheter for endoluminal dilation of ureteral stenosis provided by the embodiment of the utility model comprises the following steps:

After determining the stenosed position of the ureter in the patient, the ureteral dilation balloon catheter of suitable specification or size is selected, the guide nozzle is mounted on the cap of the endoscope working forceps, and the ureteral dilation balloon catheter is introduced into the endoscope forceps through the guide nozzle.

Further, the ureteral dilation balloon catheter is placed into a bladder through guiding of an endoscope, or enters the ureter again, and the balloon 2 in the ureteral dilation balloon catheter is confirmed to reach a preset dilation position under perspective or endoscope monitoring;

After the ureteral dilation balloon catheter is sent to a designated stricture site, the balloon 2 is filled with liquid by connecting a pressure pump with a three-way valve and opening a two-way valve until the balloon 2 is inflated, thereby completing the dilation of the stricture site.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the utility model, as generally described. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the utility model.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The ureter dilating balloon catheter is characterized by comprising a catheter body, wherein the distal end of the catheter body is provided with a catheter head end, the catheter body is provided with a balloon, the distal end of the balloon is connected with the catheter head end, the proximal end of the catheter body is provided with a joint part, the whole body of the catheter wall of the catheter body is provided with cutting grooves, and the cutting grooves are spirally distributed.

2. The ureteral dilation balloon catheter of claim 1, wherein the cutting slot extends from a junction of the balloon and the catheter tip to a proximal end of the tube along a length of the tube, the length of the cutting slot being greater than the length of the balloon.

3. The ureteral dilation balloon catheter of claim 2, wherein the helical pitch of the cutting flutes varies from small to large along the length of the tube in a direction from the distal end to the proximal end of the tube.

4. The ureteral dilation balloon catheter according to claim 1, characterized in that the catheter head end is made of nickel-titanium alloy or stainless steel welded spring, coated with polyurethane or polyamide or block polyamide.

5. The ureteral dilation balloon catheter according to claim 4, characterized in that a surface of the catheter tip is provided with a coating.

6. The ureteral dilation balloon catheter according to claim 1, characterized in that the diameter of the catheter head end gradually decreases from the position where the balloon is connected to the catheter head end to the distal position of the catheter head end, the distal end of the catheter head end being provided as a hemisphere or a sphere.

7. The ureteral dilation balloon catheter of claim 1, wherein a visualization ring is provided on the inside of the balloon.

8. The ureteral dilation balloon catheter of claim 1, wherein at least one fluid injection hole is provided at the junction of the tube and balloon, the fluid injection hole being circular in shape.

9. The ureteral dilation balloon catheter of claim 8, wherein when the number of infusion holes is a plurality, the infusion holes are uniformly distributed in a straight line or a spiral at the junction of the tube body and balloon.

10. The ureteral dilation balloon catheter of claim 1, wherein a spring layer is provided on a surface of the proximal end of the tube, the spring layer being provided in a coiled manner on the tube surface and aligned along the length of the tube.