CN111759553A - A new type of anti-reflux ureteral stent - Google Patents

Abstract

A novel anti-reflux ureteral stent relates to the technical field of medical products. It comprises: a hollow tube body that can be elastically deformed; a bladder segment arranged at one end of the hollow tube body and curled, and placed in the bladder during use; The renal pelvis segment that is placed in the renal pelvis; And, be placed on the hollow tubular body on the side close to the bladder segment, and/or, placed on the bladder segment, for according to the inside of the bladder and in the hollow tubular body. The pressure automatically opens the drainage incision or closes the drainage incision preventing the backflow of urine, and the drainage incision is placed in the bladder when the ureteral stent is used. Using the ureteral stent of the above technical solution, a drainage incision is provided on the hollow tube body or the bladder segment, and the opening or closing of the drainage incision is realized by utilizing the internal and external pressure difference between the hollow tube body and the bladder segment, thereby realizing the prevention of The effect of reverse flow has the advantages of simple structure, ingenious design and good anti-reverse flow effect.

Description

A new type of anti-reflux ureteral stent

technical field

The invention relates to the technical field of medical products, in particular to a novel anti-reflux ureteral stent.

Background technique

The ureteral stent is widely used in urological surgery, and is a kind of pipeline stent commonly used in urological surgery to drain urine. Ureteral stents are routinely placed after surgery for kidney stones, ureteral stones, kidney transplantation, hydronephrosis, kidney and ureteral tumor surgery, and ureteral stenosis to ensure the drainage of urine from the kidney to the bladder and avoid ureteral stenosis and urinary fistula. , and help the expulsion of stone fragments.

In the prior art, the ureteral stent is mainly curled at both ends into a circular ring and a double J tube, such a structure can prevent slippage, but there is still the problem of bladder urine reflux, and the reason for the occurrence of urine reflux is mainly that the ureteral stent is a A catheter that can drain in both directions. After indwelling the double J tube, the anti-reflux mechanism of the inner segment of the ureteral bladder wall is severely weakened or disappears. When the pressure in the bladder is greater than the pressure in the renal pelvis and ureter, the bladder will inevitably occur. Internal urine flows back into the ureter and renal pelvis. In addition, after the indwelling ureteral stent, urine is continuously drained, and the filling stimulation of the ureteropelvic cone is lost, resulting in a significant weakening or disappearance of the rhythmic peristalsis of the ureter, increasing the probability and severity of urine reflux. Therefore, a new type of anti-reflux ureteral stent needs to be discovered urgently.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a new type of anti-reflux ureteral stent in view of the defects and deficiencies of the prior art, which is provided with a drainage incision on the hollow tube body or the bladder segment, and uses the hollow tube body and the bladder segment. The pressure difference between the inside and outside realizes the opening or closing of the liquid discharge slit, thereby realizing the effect of preventing backflow. It has the advantages of simple structure, ingenious design and good effect of preventing backflow.

In order to achieve the above purpose, the technical scheme adopted in the present invention is: a novel anti-reflux ureteral stent, comprising: a hollow tube body that can be elastically deformed; The bladder segment in the bladder; the renal pelvis segment arranged on the other end of the hollow tubular body and curled and placed in the renal pelvis when in use; and, arranged on the hollow tubular body on the side close to the bladder segment , and/or, provided on the bladder segment, for automatically opening the drainage or closing the drainage incision to prevent the backflow of urine according to the pressure in the bladder and the hollow tube, when the ureteral stent is used, the The drainage incision is placed in the bladder; when the urine pressure in the hollow tube or in the bladder segment is greater than the pressure in the bladder, the drainage incision is in the hollow tube or the bladder When the urine pressure in the bladder segment is opened, urination is performed; when the urine pressure in the hollow tube or in the bladder segment is less than or equal to the pressure in the bladder, the pressure of the drainage incision in the bladder acts Close the drain cut at the bottom to prevent backflow.

Further, the drainage incision is a bar-shaped opening parallel to the extension direction of the crimped portion of the bladder segment.

Further, the end surface of the drainage incision is provided with a closed surface close to the inner side of the ureteral stent. When the ureteral stent is subjected to intravesical pressure, the drainage incision is stretched and deformed to the outside, and the closed surface is kept close.

Further, the included angle between the closed surface and the end surface of the liquid drain cut is an obtuse angle.

Further, the drainage incision is arranged on the side of the hollow tube body close to the bladder segment.

Further, the materials of the hollow tubular body, the bladder segment and the renal pelvis segment are all polyurethane.

Further, the rolled-up shapes of the bladder segment and the renal pelvis segment are both pigtail-shaped.

Further, both the bladder segment and the renal pelvis segment are integrally formed with the hollow tubular body.

After adopting the above technical scheme, the beneficial effect of the present invention is as follows: a drainage incision is arranged on the hollow tube body or bladder segment, and the opening or closing of the drainage incision is realized by utilizing the internal and external pressure difference between the hollow tube body and the bladder segment. Specifically, when the urine pressure in the hollow tube body or the bladder segment is greater than the pressure in the bladder, the drainage incision is opened under the urine pressure in the hollow tube body or the bladder segment, so that urination is performed; in the hollow tube body or the bladder segment When the urine pressure in the bladder segment is less than or equal to the pressure in the bladder, the drainage incision is under the action of the pressure in the bladder, making the closed surfaces close to each other and closing the drainage incision, which can effectively prevent the backflow of urine in the bladder. The situation of secondary injury to the patient due to the reverse flow of urine is avoided, and the ureteral stent set in this way has the advantages of simple structure, ingenious design, good anti-reverse flow effect, and little harm to the patient.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the overall structure schematic diagram of this embodiment;

Fig. 2 is the structural representation corresponding to the cut-away line A-A in Fig. 1;

FIG. 3 is a cross-sectional view of the drain slit in the present embodiment in an open state;

FIG. 4 is a cross-sectional view of the drain slit in the closed state in this embodiment.

Description of reference numerals: 1. Hollow tubular body; 2. Bladder segment; 3. Renal pelvis segment; 4. Drainage incision; 5. Port of bladder segment; 6. Port of renal pelvis segment;

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as needed after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

This embodiment relates to a novel anti-reflux ureteral stent, as shown in FIGS. 1-4 , including: a hollow tubular body 1 , a bladder segment 2 , a renal pelvis segment 3 , and a drainage incision 4 .

Specifically, the hollow tubular body 1 can be elastically deformed. The bladder segment 2 is arranged at one end of the hollow tubular body 1 and is crimped. When the ureteral stent is used, bladder segment 2 is placed in the bladder. The renal pelvis segment 3 is arranged at the other end of the hollow tubular body 1 and is crimped. When the ureteral stent is used, the renal pelvis segment 3 is placed in the renal pelvis. The drainage incision 4 is arranged on the side of the hollow tubular body 1 close to the bladder segment 2, and/or, the drainage incision 4 is arranged on the bladder segment 2. The drainage incision 4 is used to automatically open or close the drainage according to the pressure in the bladder segment 2 and the hollow tube body 1 to prevent the backflow of urine. When the ureteral stent is used, the drainage incision 4 is placed in the bladder.

In this embodiment, the drainage incision 4 is located on the side of the hollow tubular body 1 close to the bladder segment 2 . In other embodiments, the drainage incision 4 is located on the bladder end 2 , or, a drainage incision 4 is provided on the side of the hollow tubular body 1 close to the bladder segment 2 and on the bladder segment 2 .

It is worth noting that the dashed arrows in the accompanying drawings are indicative of the pressure state of urine. Since the human kidneys continuously produce urine in daily life, the hollow tubular body 1, the bladder segment 2 and the renal pelvis segment 3 are continuously injected with urine, and the human bladder urinates when the urgency of urination occurs, thus forming a hollow tubular body 1 and bladder segment 2 where the pressure in the bladder is replaced by the pressure in the bladder. Specifically, when the urine pressure in the hollow tube body 1 or the bladder segment 2 is greater than the pressure in the bladder, the drainage incision 4 is opened under the urine pressure in the hollow tube body 1 or the bladder segment 2, and urination is performed. . When the urine pressure in the hollow tube body 1 or the bladder segment 2 is less than or equal to the pressure in the bladder, the drainage incision 4 closes the drainage incision 4 under the action of the pressure in the bladder, thereby preventing the backflow of urine .

Preferably, as shown in FIGS. 1-4 , the hollow tubular body 1 , the bladder segment 2 and the renal pelvis segment 3 are integrally formed, and all are made of polyurethane. A bladder segment port 5 is provided at the end of the bladder segment 2, and a renal pelvis segment port 6 is provided at the end of the renal pelvis segment 3, and the renal pelvis segment port 6 is used for introducing urine. Both bladder segment 2 and renal pelvis segment 3 have a pigtail-like coil shape.

Preferably, as shown in FIGS. 1-4 , the drainage incision 4 is a bar-shaped opening parallel to the extending direction of the crimped portion of the bladder segment 2 .

Further, as shown in FIGS. 1-4 , a closing surface 7 is provided on the end surface of the drainage incision 4 close to the inner side of the ureteral stent. When the ureteral stent is subjected to intravesical pressure, the drainage incision 4 is stretched and deformed to the outside, and the closed surface 7 is kept close.

Preferably, as shown in FIGS. 1-4 , the included angle between the closing surface 7 and the end surface of the drainage incision 4 is an obtuse angle, and the drainage incision 4 is provided on the hollow tube body 1 on the side close to the bladder segment 2 . At the same time, the included angle between the closed surface 7 and the end surface of the drainage incision 4 is set to be an obtuse angle, so that a ">"-shaped gap appears in the drainage incision 4 in the ureteral stent. When the urine pressure inside the ureteral stent increases, the pressure at the ">"-shaped gap is the greatest. The closing surface 7 thus arranged facilitates the opening of the drainage cutout 4 .

The working principle of this embodiment is roughly as follows: by setting a drainage incision 4 on the hollow tube body 1 or the bladder segment 2, and utilizing the internal and external pressure difference between the hollow tube body 1 and the bladder segment 2 to realize the opening of the drainage incision 4 On or off. Specifically, when the urine pressure in the hollow tube body 1 or the bladder segment 2 is greater than the pressure in the bladder, the discharge incision 4 is opened under the urine pressure in the hollow tube body 1 or the bladder segment 2, so as to carry out Urination; when the urine pressure in the hollow tube body 1 or in the bladder segment 2 is less than or equal to the pressure in the bladder, the drainage incision 4 is under the action of the pressure in the bladder, so that the closed surfaces 7 are close to each other, and the drainage incision is closed. 4. It can effectively prevent the reverse flow of urine in the bladder, and avoid the situation of secondary injury to the patient due to the reverse flow of urine. The ureteral stent set in this way has a simple structure, an ingenious design, a good anti-reverse flow effect, and little harm to the patient. Advantage.

The above is only used to illustrate the technical solution of the present invention and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be included in the within the scope of the claims of the present invention.

Claims (8)

1. a novel anti-reflux ureteral stent, is characterized in that, comprises: A hollow tubular body (1) capable of elastic deformation; a bladder segment (2) arranged at one end of the hollow tubular body (1) and curled and placed in the bladder during use; a renal pelvis segment (3) arranged at the other end of the hollow tubular body (1) and curled and placed in the renal pelvis during use; And, be arranged on the side of the said hollow tube body (1) close to the described bladder segment (2), and/or, be arranged on the said bladder segment (2), for according to the bladder and the described hollow The pressure in the tube body (1) automatically opens the drainage incision (4) for preventing the backflow of urine, and when the ureteral stent is used, the drainage incision (4) is placed in the bladder; When the urine pressure in the hollow tubular body (1) or in the bladder segment (2) is greater than the pressure in the bladder, the drainage incision (4) is in the hollow tubular body (1) Or open under the pressure of urine in the bladder segment (2) to urinate; When the urine pressure in the hollow tubular body (1) or in the bladder segment (2) is less than or equal to the pressure in the bladder, the drainage incision (4) closes the drainage under the pressure in the bladder The liquid incision (4) plays the role of preventing backflow. 2 . The novel anti-reflux ureteral stent according to claim 1 , wherein the drainage incision ( 4 ) is a bar-shaped opening parallel to the extension direction of the curled portion of the bladder segment ( 2 ). 3 . 3. novel anti-reverse flow ureteral support according to claim 2, is characterized in that, the end face of described discharge incision (4) is provided with closed surface (7) close to the inner side of ureteral support, when ureteral support is received in bladder. When the pressure is applied, the drainage cutout (4) is stretched and deformed to the outside, and the closing surface (7) is kept in close contact. 4 . The novel anti-reverse flow ureteral stent according to claim 3 , wherein the included angle between the closed surface ( 7 ) and the end surface of the drainage incision ( 4 ) is an obtuse angle. 5 . 5. The novel anti-reflux ureteral stent according to claim 1-4, characterized in that, the drainage incision (4) is provided on the hollow tube body (1) close to the bladder segment (2) 1 . side. 6. The novel anti-reflux ureteral stent according to claim 5, wherein the hollow tube body (1), the bladder segment (2) and the renal pelvis segment (3) are all made of polyamino formate. 7 . The novel anti-reflux ureteral stent according to claim 6 , characterized in that, the rolled shape of the bladder segment ( 2 ) and the renal pelvis segment ( 3 ) are both pigtail-shaped. 8 . 8 . The novel anti-reflux ureteral stent according to claim 7 , wherein the bladder segment ( 2 ) and the renal pelvis segment ( 3 ) are integrally formed with the hollow tubular body ( 1 ). 9 .

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