CN111388838A

CN111388838A - Ureteral stent

Info

Publication number: CN111388838A
Application number: CN202010162310.9A
Authority: CN
Inventors: 吕共生
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-07-10

Abstract

The patent discloses a ureteral stent, which comprises a ureteral stent body, wherein one end of the body is a J-shaped head end; the other end of the body is a straight end, and the straight end is an opening end; a plurality of through holes are uniformly distributed on the surface of the body; the medical straight-head end is characterized by also comprising a traction wire, wherein the traction wire is made of a non-degradable medical material, one end of the traction wire is fixed on the cross section of the pipe wall of the straight-head end, and the middle part of the traction wire is folded, adhered and fixed at the straight-head end by degradable biological glue; the biogel can be degraded by enzymes contained in urine; when the biological glue is degraded, the free end of the traction wire can be discharged out of the body along with the urination of the patient. The patient can avoid the pain of removal through the cystoscope, and the damage to the mind and physiology of the patient is greatly reduced; and the anti-reflux function of the ureter is not influenced, and the bladder urine reflux can be resisted.

Description

Ureteral stent

Technical Field

The patent relates to the field of medical equipment, concretely relates to ureteral stent.

Background

In the human body, urine secreted by the kidney passes from the renal pelvis, through the ureter to the bladder and is then excreted from the body through the urethra during urination. In a healthy human body, urine is excreted from the kidney to the bladder in one direction by means of peristaltic movement of the ureters.

Certain urinary tract disorders or certain diseases may hamper such excretion in the direction of the bladder. These conditions may be caused in particular by the presence of stones or tumors or obstructions at the pyeloureteral junction. In this case, the flow of urine to the bladder may be difficult or may no longer be possible at all. Urine remaining in the kidneys swells and can cause renal colic. To eliminate this condition, treatment may be performed surgically.

Ureteral stent tubes are required to be left in ureters after ureteral surgery ureteral stones, tumors, narrow operations and percutaneous nephroscope operations, and the ureteral stent tubes are used for avoiding ureteral surgery stenosis, reducing hydronephrosis, relieving ureteral obstruction and the like. However, the prior ureteral stent tube needs to be pulled out through a cystoscope after a period of operation, the cystoscope operation brings great pain to patients, and the ureteral stent tube can influence the anti-reflux function of the ureter.

Content of patent

The ureteral stent is designed, so that the pain caused by removal through a cystoscope is avoided, and the damage to the mind and physiology of a patient is greatly reduced; and the anti-reflux function of the ureter is not influenced, and the bladder urine reflux can be resisted.

In order to achieve the purpose, the patent provides the following technical scheme:

a ureteral stent comprises a ureteral stent body, wherein the body is of a soft hollow tubular structure; one end of the body is a J-head end configured for placement in a renal pelvis of a patient; the other end of the body is a straight end, the straight end being an open end, the straight end configured for placement in a ureter of a patient; a plurality of through holes are uniformly distributed on the surface of the body; the medical straight-head end is characterized by also comprising a traction wire, wherein the traction wire is made of a non-degradable medical material, one end of the traction wire is fixed on the cross section of the pipe wall of the straight-head end, and the middle part of the traction wire is folded, adhered and fixed at the straight-head end by degradable biological glue; the biogel can be degraded by enzymes contained in urine; when the biological glue is degraded, the free end of the traction wire can be discharged out of the body along with the urination of the patient.

Further, the biogel can adjust the degradation time by changing the type and the dosage of the biogel. The arrangement is such that the degradation time of the biological glue can be adjusted according to the illness state of the patient. The condition of the patient is prevented from being in a critical period, the biogum is degraded, and the free end of the traction wire is discharged out of the body along with urine prematurely.

Further, the biogel is starch or polysaccharide. According to the technical scheme, starch or polysaccharide which can be degraded by enzyme contained in urine is used as biological glue, so that effective implementation of the technical scheme is guaranteed.

Further, the degradation time is 1 week to 6 months. By the arrangement, the degradation time of the biological glue can be adaptively adjusted according to the illness state of the patient.

Further, when the traction wire is fixed by the biological glue fold, the folded traction wire can reach the bladder of the patient. So configured, when the pull wire is still folded and bonded, the pull wire is used to help the urine flow from the ureter to the bladder, but not allowed to flow in the opposite direction, thereby not affecting the anti-reflux function of the ureter end and playing a role in draining the urine. At the same time, the wire also serves to help expel the stones.

Furthermore, the traction wire is fixed on the cross section of the pipe wall of the straight end by the biological adhesive and is repeatedly folded into a U shape. By the arrangement, the ureteroscope insertion operation of the ureteral stent is not hindered, and the biological glue is easy to disperse after being degraded.

Further, the length of the traction wire is 5-45 cm. According to the arrangement, the length of the traction wire can be designed to be different according to different urethra of male or female patients, so that the applicability is improved.

Further, the traction wire is made of nylon wires or cotton wires or hemp wires. So set up, adopt nondegradable nylon wire or cotton thread or hemp thread as the pull wire, guarantee this technical scheme's effective implementation.

Further, the spot-shaped bonding diameter of the biological glue is less than 2 mm. So set up, guarantee that degradable biological glue use amount is few, the degradation is fast. Avoids the occurrence of dangerous conditions of patients caused by acute obstruction of ureter and urethra due to incomplete degradation.

Compared with the prior art, the beneficial effect of this patent:

when the ureter of a patient is blocked mainly due to calculus or tumor or obstruction at the connection part of the renal pelvis and the ureter, the J-shaped head end of the ureter stent body is hooked in the renal pelvis of the patient, and the straight head end is arranged in the ureter of the patient. At the moment, the connecting part of the ureter and the bladder of the patient is not blocked, the ureter has a condensation function, and the straight end of the body is positioned in the ureter, so that the urine in the bladder cannot return to the renal pelvis along the ureter stent, the anti-reflux function of the ureter is not influenced, and the anti-reflux function of the urine in the bladder can be realized.

When the biological glue is degraded, the traction line is automatically stretched, and the free end of the traction line is discharged from the urethral orifice along with the urination of the patient. The patient can pull the traction line by himself to pull out the soft ureteral stent along the urethra. Thereby, the pain of inserting the cystoscope into the urethra for removal is reduced and the medical expense is saved.

Drawings

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

FIG. 1 is a schematic structural diagram of the present patent (the biogel is not degraded);

FIG. 2 is a drawing line bonded to the cross section of the tube wall with a straight end by the bio-adhesive of the present patent;

FIG. 3 is a schematic view of the overall structure of the release of the pull wire before the degradation of the biogel;

FIG. 4 is a schematic view of the overall structure of the release of the pulling wire after the degradation of the biogel according to the present patent;

the names of the components identified in the figures are as follows:

1. a body; 2. a J-shaped head end; 3. a straight end; 4. a pull wire; 5. biological glue; 6. a through hole; 701. the renal pelvis; 702. a ureter; 703. the bladder; 704. the urethra.

Detailed Description

The technical solutions in this patent will be described clearly and completely with reference to the accompanying drawings in this patent, and obviously, only some embodiments, not all embodiments, of this patent are described. 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 scope of protection of this patent.

Example (b):

a ureteral stent comprises a ureteral stent body 1, wherein the body 1 is of a soft hollow tubular structure; one end of the body 1 is a J-head end 2, the J-head end 2 being configured for placement in the renal pelvis 701 of a patient; the other end of the body 1 is a straight head end 3, the straight head end 3 being an open end, the straight head end 3 being configured for placement in a ureter 702 of a patient; a plurality of through holes 6 are uniformly distributed on the surface of the body 1; the medical traction device is also provided with a traction wire 4, wherein the traction wire 4 is made of a non-degradable medical material, one end of the traction wire 4 is fixed on the cross section of the tube wall of the straight end 3, and the middle part of the traction wire 4 is folded, adhered and fixed at the straight end 3 by degradable biological glue 5; the biogel 5 can be degraded by enzyme contained in urine; when the biological glue 5 is degraded, the free end of the traction wire 4 can be discharged out of the body along with the urination of the patient.

The biogel 5 can adjust the degradation time by changing the type and the amount of the biogel 5. The arrangement is such that the degradation time of the biogel 5 can be adjusted according to the illness state of the patient. The condition of the patient is prevented from being in a critical period, the biogum 5 is degraded, and the free end of the traction wire 4 is discharged out of the body along with urine prematurely.

The biogel 5 is starch or polysaccharide. So set up, adopt starch or polysaccharide that can be degraded by the enzyme that the urine contains as biological glue 5, guarantee the effective implementation of this technical scheme.

The degradation time is 1 week to 6 months. By such arrangement, the degradation time of the biological glue 5 can be adjusted according to the illness state of the patient.

When the traction wire 4 is folded and adhesively secured by the bio-gel 5, the folded traction wire 4 can reach the bladder 703 of the patient. So configured, when the pull wire 4 is still folded and bonded, the pull wire 4 is used to help the flow of urine from the ureter 702 to the bladder 703, but not in the opposite direction, so as to not affect the anti-reflux function of the ureter end, thereby performing a drainage function. At the same time, the wire also serves to help expel the stones.

The traction wire 4 is fixed on the cross section of the pipe wall of the straight end 3 by biological glue 5, and is repeatedly folded into a U shape. So arranged, the ureteral stent tube does not obstruct the operation of putting in the ureteral 702 mirror, and is easy to disperse after the biological glue 5 is degraded.

The length of the traction wire 4 is 5-45 cm. With this arrangement, the length of the traction wire 4 can be designed to be different according to the urethra 704 of a male or female patient, thereby improving the applicability.

The material of the traction wire 4 is nylon wire or cotton wire or hemp wire. So set up, adopt nondegradable nylon wire or cotton thread or hemp thread as pull wire 4, guarantee this technical scheme's effective implementation.

The spot-shaped bonding diameter of the biological glue 5 is less than 2 mm. So set up, guarantee that degradable biological glue 5 use amount is few, the degradation is fast. Avoids the occurrence of dangerous conditions of the patient caused by acute obstruction of the ureter 702 and the urethra 704 due to incomplete degradation.

The working principle of the embodiment is as follows:

when the ureter 702 of a patient is blocked mainly due to calculus or tumor or obstruction at the connecting part of the renal pelvis 701 and the ureter 702, the J-shaped head end 2 of the ureter stent tube body 1 is hooked in the renal pelvis 701 of the patient, and the straight head end 3 is arranged in the ureter 702 of the patient. At this time, since the connection part between the ureter 702 and the bladder 703 of the patient is not blocked and the ureter 702 itself has a condensation function, when the kidney is not contracted and closed by the ureter 702, since the straight end 3 of the body 1 is in the ureter 702, the urine in the bladder 703 cannot return to the renal pelvis 701 along the ureteral stent tube, and the anti-reflux function of the ureter 702 is not affected, and the urine in the bladder 703 can be resisted from flowing back.

After urine is produced from the renal pelvis 701, the urine is discharged to the opening of the straight end 3 along the hollow inner diameter of the body 1 through the through hole 6 on the surface of the ureteral stent tube body 1, flows down to the bladder 703 along the lower part of the ureter 702 without blockage under the guidance of the folded traction wire 4, and is finally discharged from the urethra 704.

When the degradation of the biological glue 5 is finished, the traction wire 4 automatically extends, and the free end of the traction wire 4 is discharged from the urethra 704 along with the urination of the patient. The patient can pull the traction wire 4 by himself to pull the soft ureteral stent out of the body along the urethra 704. Thus, the pain of removal of the cystoscope 703 from insertion into the urethra 704 is reduced and medical expenses are saved.

Claims

1. A ureteral stent comprises a ureteral stent body, wherein the body is of a soft hollow tubular structure; the method is characterized in that: one end of the body is a J-shaped head end, and the J-shaped head end is used for being placed in a renal pelvis of a patient; the other end of the body is a straight end which is an opening end and is used for being placed in a ureter of a patient; a plurality of through holes are uniformly distributed on the surface of the body; the medical straight-head end is characterized by also comprising a traction wire, wherein the traction wire is made of a non-degradable medical material, one end of the traction wire is fixed on the cross section of the pipe wall of the straight-head end, and the middle part of the traction wire is folded, adhered and fixed at the straight-head end by degradable biological glue; the biogel can be degraded by enzymes contained in urine; when the biological glue is degraded, the free end of the traction wire can be discharged out of the body along with the urination of the patient.

2. The ureteral stent tube according to claim 1, wherein: the biogel can adjust the degradation time by changing the type and the dosage of the biogel.

3. The ureteral stent tube according to claim 1 or 2, wherein: the biological glue is starch or polysaccharide.

4. The ureteral stent tube according to claim 2, wherein: the degradation time is 1 week to 6 months.

5. The ureteral stent tube according to claim 1, wherein: when the traction wire is folded, bonded and fixed by the biological glue, the folded traction wire can reach the bladder of a patient for draining urine.

6. The ureteral stent tube according to claim 1, wherein: the traction wire is bonded and fixed on the cross section of the pipe wall of the straight end by the biological glue and is repeatedly folded into a U shape.

7. The ureteral stent tube according to claim 1, wherein: the length of the traction wire is 5-45 cm.

8. The ureteral stent tube according to claim 1, wherein: the traction wire is made of nylon wires or cotton wires or hemp wires.

9. The ureteral stent tube according to claim 1, wherein: the spot-shaped bonding diameter of the biological glue is less than 2 mm.