CN212631294U

CN212631294U - Ureteral stent

Info

Publication number: CN212631294U
Application number: CN201922314238.2U
Authority: CN
Inventors: 施猛; 王攀; 李好雨; 王文渊; 杨中科; 高飞
Original assignee: Sichuan Hairong Pharmaceutical Co Ltd Yangtze River Pharmaceutical Group; Sichuan Haihui Pharmaceutical Co ltd
Current assignee: Sichuan Yangzijiang Medical Instrument Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-03-02
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a ureteral stent, which comprises a drainage tube, wherein both ends of the drainage tube are fixedly connected with expansion components which are in a lantern shape; the expansion assembly comprises supports, the supports are made of elastic materials, the supports are distributed in an annular array mode, gaps exist between every two adjacent supports, the supports in a free state are arched, one ends of the supports are fixedly connected with the drainage tubes, the other ends of the supports are fixedly connected with the fixing rings, the joints of the supports, the drainage tubes and the fixing rings are in smooth transition, and the gaps between the supports are communicated with the drainage tubes. The utility model discloses can improve the fixity ability, improve drainage speed.

Description

Ureteral stent

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a ureter support.

Background

Ureteral calculus mostly originates from the kidney, and comprises kidney calculus or the falling of calculus fragments after an external shock wave. Because the urinary salt crystals are easy to be discharged into the bladder with urine, primary ureteral calculi are rare. With the induction factors of ureteral stenosis, diverticulum, foreign bodies, etc., urinary retention and infection can promote the occurrence of ureteral calculus. Ureteral calculus is mostly single, and the incidence of the calculus is approximately similar on the left and right sides.

With the development of intracavity urinary surgery and the continuous improvement of ureteral stent tubes, the drainage in ureters gradually replaces external drainage, which becomes the most common upper urinary tract drainage mode in urinary surgery, and the application of ureteral stent tubes in urinary surgery is more and more extensive, which has become an indispensable treatment tool in most urinary surgery.

Common ureteral stent in the existing market is fixed between kidney and bladder through its pigtail circle, and its drainage mode is that circle the hole that punches and form through the pigtail and carry out the drainage, and pigtail circle fixed strength is too low, causes the ureter slippage easily, and the drainage hole on the pigtail circle is too little simultaneously, and the drainage effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ureteral stent, improved the fixity, improved drainage speed.

In order to achieve the purpose, the utility model adopts the following technical proposal to realize:

the utility model discloses a ureteral stent, which comprises a drainage tube, wherein both ends of the drainage tube are fixedly connected with expansion components which are in a lantern shape;

the expansion component comprises brackets made of elastic materials, a plurality of brackets are distributed in an annular array, gaps exist between every two adjacent brackets, the bracket in a free state is in an arc shape, one end of each bracket is fixedly connected with the drainage tube, the other end of each bracket is fixedly connected with the fixing ring, the joints of the brackets, the drainage tube and the fixing ring are in smooth transition, the gaps between the brackets are communicated with the drainage tube,

the expansion component is in an expansion state when not subjected to external force, the middle of the expansion component is large, the two ends of the expansion component are small, the gap between the adjacent brackets is the maximum value,

the expansion assembly is in a contracted state when subjected to an external force, and the gap between adjacent brackets is reduced.

Preferably, the outer wall of the drainage tube is provided with fluorescent marks along the length direction, and the fluorescent marks are arranged at equal intervals.

Preferably, the size of the bracket gradually decreases from the middle to the end.

Preferably, the distance between the middle portions of adjacent stents is greater than the width of the middle of the stent.

Preferably, the support includes arc portion, connecting portion, and arc portion links firmly connecting portion, and arc portion and connecting portion smooth transition.

Preferably, the central angle of the circular arc portion is < 180 °.

Preferably, the arc portion and the connecting portion are integrally manufactured.

Preferably, the outer diameter of the fixing ring is equal to that of the drainage tube, and the fixing ring and the drainage tube are coaxially arranged.

Preferably, the spaces between the brackets communicate with the retaining ring.

Preferably, the number of the brackets is more than or equal to 3.

The utility model has the advantages that:

1. the utility model can be better fixed between the bladder and the renal pelvis, and is not easy to slip.

2. The utility model discloses can realize the effect of quick drainage.

Drawings

Fig. 1 is a schematic view of the present invention.

In the figure: 1-drainage tube, 2-fixing ring, 3-bracket, 4-arc part and 5-connecting part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in figure 1, the utility model comprises a drainage tube 1, wherein both ends of the drainage tube 1 are fixedly connected with expansion components which are in a lantern shape; the expansion component comprises a bracket 3, the bracket 3 is made of elastic materials, a plurality of brackets 3 are distributed in an annular array, the number of the brackets 3 is more than or equal to 3, gaps exist between adjacent brackets 3, the bracket 3 in a free state is in an arc shape, one end of the bracket 3 is fixedly connected with a drainage tube 1, the other end of the bracket 3 is fixedly connected with a fixing ring 2, the joints of the bracket 3, the drainage tube 1 and the fixing ring 2 are in smooth transition, the gaps between the brackets 3 are communicated with the drainage tube 1, fluorescent marks are arranged on the outer wall of the drainage tube 1 along the length direction, the fluorescent marks are arranged at equal intervals, the size of the middle part of the bracket 3 towards the end part is gradually reduced, the distance between the middle parts of the adjacent brackets 3 is larger than the width of the middle part of the bracket 3, the bracket 3 comprises an arc part 4 and a connecting part 5, the arc part, the fixing ring 2 and the drainage tube 1 are coaxially arranged, the space between the brackets 3 is communicated with the fixing ring 2,

the bracket 3 is made of elastic material, such as plastic, high molecular material and metal material,

the central angle of the circular arc part 4 is less than 180 degrees, which can ensure that the bracket 3 is contracted inwards when entering the ureter and being extruded, but not collapsed into a cake shape,

the arrangement of the fixing ring 2 ensures that the position of the stent 3 is kept relatively fixed on one hand, and also ensures that the stent 3 is prevented from stabbing the ureter when entering the ureter on the other hand,

the size of the middle part of the bracket 3 is gradually reduced towards the end part, so that after the bracket 3 enters the renal pelvis and expands again, the contact area of the bracket 3 and the renal pelvis is larger, and the stimulation to the renal pelvis and the bladder is reduced.

In practical use, before the ureter is inserted, the bracket 3 is in a natural state and is in a bow shape, when the ureter is inserted, the bracket 3 is compressed by the ureter to shrink, after the ureter is inserted into the renal pelvis, the bracket 3 is restored to be in the bow shape and is fixed in the renal pelvis, the other end of the bracket 3 is fixed in the bladder according to the same principle,

when drainage is performed, body fluid flows into the drainage tube 1 from the gap between the stents 3 and then flows into the bladder, and rapid drainage can be achieved due to the large gap.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. A ureteral stent, characterized in that: comprises a drainage tube (1), wherein both ends of the drainage tube (1) are fixedly connected with expansion components;

the expansion assembly comprises supports (3), the supports (3) are made of elastic materials, a plurality of supports (3) are distributed in an annular array, gaps exist between every two adjacent supports (3), the supports (3) in a free state are in an arc shape, one end of each support (3) is fixedly connected with a drainage tube (1), the other end of each support (3) is fixedly connected with a fixing ring (2), the joints of the supports (3) with the drainage tubes (1) and the fixing rings (2) are in smooth transition, and the gaps between the supports (3) are communicated with the drainage tubes (1);

the expansion component is in an expansion state when not being subjected to external force, the middle of the expansion component is large, the two ends of the expansion component are small, the gap between the adjacent brackets (3) is the maximum value,

the expansion assembly is in a contracted state when subjected to an external force, and the gap between the adjacent brackets (3) is reduced.

2. The ureteral stent of claim 1, wherein: the outer wall of the drainage tube (1) is provided with fluorescent markers along the length direction, and the fluorescent markers are arranged at equal intervals.

3. The ureteral stent of claim 1, wherein: the size of the middle part of the bracket (3) is gradually reduced towards the end part.

4. The ureteral stent of claim 3, wherein: the distance between the middle parts of the adjacent brackets (3) is larger than the width of the middle of the bracket (3).

5. The ureteral stent of claim 1, wherein: the support (3) comprises an arc part (4) and a connecting part (5), the arc part (4) is fixedly connected with the connecting part (5), and the arc part (4) and the connecting part (5) are in smooth transition.

6. The ureteral stent of claim 5, wherein: the central angle of the circular arc part (4) is less than 180 degrees.

7. The ureteral stent of claim 5, wherein: the arc part (4) and the connecting part (5) are manufactured integrally.

8. The ureteral stent of claim 1, wherein: the outer diameter of the fixing ring (2) is equal to that of the drainage tube (1), and the fixing ring (2) and the drainage tube (1) are coaxially arranged.

9. The ureteral stent of claim 1, wherein: the space between the brackets (3) is communicated with the fixing ring (2).