CN219782856U - Ureteral stent tube for patient with urinary diversion - Google Patents

Abstract

The utility model discloses a ureteral stent tube for a patient with urinary diversion, which comprises a stent tube and a sheath tube, wherein the single J-shaped stent tube with different openings at one end and two ends can be replaced, meanwhile, the ureteral orifice expanding function which is not possessed by the traditional technology can be realized, the damage of a ureter can be reduced, the efficiency and the safety of tube replacement are effectively improved, and the damage to mucous membrane tissues in a human body cavity is avoided. The device is suitable for replacing the indwelling stent and the drainage tube of the human body stoma, is soft in material, has the same compliance as the drainage stent, is a silica gel soft head end, and protects the safety of a natural cavity.

Description

Ureteral stent tube for patient with urinary diversion

Technical Field

The utility model relates to the field of medical equipment, in particular to a ureteral stent tube for a patient with urinary diversion.

Background

At present, the ureteral stent is widely applied to the postoperative of urinary system diseases, and can effectively drain urine and prevent ureteral stenosis after being placed in a ureter due to the internal support and the internal drainage function, thereby being beneficial to recovery of renal functions of affected sides. Bladder tumors are common malignant tumors of the genitourinary system, and the morbidity and mortality of the malignant tumors account for the first place of the genitourinary system tumors. At present, radical bladder total cutting operation and urinary diversion are the first treatment modes for treating invasive bladder cancer. The ileum instead of the bladder abdominal wall stoma is a more common urine flow diversion mode, namely, a section of free ileum with a tied membrane is taken, the proximal end of the free ileum is closed and then anastomosed with ureters on two sides, and the distal end of the free ileum runs through the abdominal wall skin stoma, so that urine drainage is realized through an external urine bag and a bracket.

The single J tube is used as a medical consumable material commonly used after the bladder total incision operation, plays an important role in drainage of urine in the kidney pelvis after operation, and a part of patients need to keep the single J tube for a long time to prevent ureteral stoma from being narrowed; and the single J tube needs to be replaced periodically so as to avoid complications such as drainage disorder hydronephrosis and the like caused by the blockage of the tube cavity of the single J tube.

Conventional methods of replacing single J-tubes often require the use of a guidewire. Case one: the replacement of the double-end opening single J tube is to insert a guide wire into the original single J tube cavity, push out the old tube after the guide wire enters the single J tube cavity to reach the length remained in the body, keep the guide wire in the ureter, insert a new single J tube into the ureter along the guide wire, and keep the original length. However, if the lumen of the single J tube were to become occluded, the guidewire would not be accessible and there would be a risk of failure in replacing the single J tube. Blind insertion is often performed by the experience of the physician or replaced by surgical means. Causing great waste of medical resources and easily causing unnecessary medical disputes. And in the second case, the single J tube with the single end opening is replaced, namely the original old tube is directly pulled out, and the single J tube is directly inserted into the ureterostomy by virtue of the experience of doctors, so that the operation is often carried out by doctors with rich experience, and the operation is very difficult for low-annual-resource doctors and primary hospitals.

Aiming at the problems occurring during tube replacement of a single J tube, a tube replacement operation method which can be carried out in a unified mode needs to be designed, so that the tube replacement of the single J tube is simplified, and medical measures which are conventionally carried out by doctors with low annual resources and primary hospitals are met.

Disclosure of Invention

The utility model combines theoretical basis and practice to obtain a tube replacement mode which meets the requirements, firstly, the design meets the requirement that single J-shaped support tubes with different openings at single end and double ends are replaced, secondly, the function of expanding ureteral orifice which is not possessed by the traditional technology can be realized, thirdly, the current situation that the original technology can not be normally carried out when the lumen of the support tube is blocked is changed, and fourthly, particularly, when a patient with a stoma on the ureter abdominal wall has the tortuous condition of the ureter of the abdominal wall section, the utility model provides the ureter support tube, the damage of the ureter is reduced to a greater extent, and the safety of tube replacement is effectively improved.

Specifically, the utility model adopts the following technical scheme

1. A ureteral stent for a patient with diversion of urine flow comprises a stent tube and a sheath tube, wherein the stent tube and the sheath tube are sleeved and connected, and the stent tube can be inserted and extracted in the sheath tube.

2. A ureteral stent as described above, the stent being a single J-tube.

3. As with the ureteral stent described above, the sheath distal end has a ramp that is in resilient contact with the outer surface of the stent.

4. The ureteral stent as described above, the outer diameter of the stent is 2-5 mm.

5. As with the ureteral stent tube described above, the inner diameter of the cross section at the distal end of the ramp is 0.1-1 mm wider than the outer diameter of the stent tube.

6. The ureteral stent as described above has a length of 30 to 80cm, preferably 30 to 50cm.

7. As described above, the length of the sheath is 20 to 30cm, preferably 20 to 25cm.

8. A ureteral stent as described above, the outer surface of the stent having a hydrophilic coating.

9. As described above, the distal end of the sheath is made of silica gel or polyurethane.

10. The ureteral stent as described above, the sheath has graduations.

Technical effects

1. The ureteral stent tube can replace a single J-shaped stent tube with different openings at one end and two ends aiming at the single J-shaped stent tube used by a patient with urinary diversion, and can realize the ureteral orifice expanding function which is not possessed by the traditional technology.

2. The ureteral stent tube can change the current situation that a guide wire cannot be inserted when a lumen of the stent tube is blocked and normal replacement cannot be performed in the prior art, and particularly reduces the damage of a ureter to a greater extent under the condition that a patient with a stoma on the ureter abdominal wall has a tortuous ureter, and effectively improves the efficiency and the safety of tube replacement.

3. The ureteral stent tube has a slope design, and does not damage mucosal tissues in a human body cavity. The device is suitable for replacing the indwelling stent and the drainage tube of the human body stoma, is soft in material, has the same compliance as the drainage stent, is a silica gel soft head end, and protects the safety of a natural cavity.

Drawings

The drawings are included to provide a better understanding of the utility model and are not to be construed as unduly limiting the utility model. Wherein:

fig. 1 is a schematic view of the structure of a ureteral stent according to the present utility model.

In the figure, 1, a stent tube; 2. a sheath; 3. and (3) a slope.

Detailed Description

Exemplary embodiments of the utility model are described below, including various details of embodiments of the utility model to facilitate understanding, which should be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the utility model. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Referring to fig. 1, the utility model provides a ureteral stent tube, which comprises a stent tube 1 and a sheath tube 2, wherein the stent tube and the sheath tube are sleeved, and the stent tube can be inserted and extracted in the sheath tube.

In operation, when the stent tube 1 is first placed in a patient along a guide wire, the distal end of the sheath tube 2 is inserted into the body from the stoma of the abdominal wall of the patient and is nested outside the stent tube 1 when the stent tube 1 is periodically replaced, the stent tube 1 is tightly fitted with the sheath tube 2, the insertion is stopped when the sheath tube 2 reaches a prescribed position in the body, at this time, the proximal end of the sheath tube 2 remains partially on the outer surface of the body, then the stent tube 1 which has been placed in the body is pulled out, at this time, the sheath tube 2 remains still in the body, then a new stent tube 1 is inserted axially inside the sheath tube 2, the sheath tube 2 remains still, and when the new stent tube 1 reaches the prescribed position, the insertion is stopped, the sheath tube 2 is pulled out, and the replacement of the stent tube 1 is completed.

In the interventional medical field, the end close to the operator is defined as the "proximal end", and the end far from the operator is defined as the "distal end"; for an elongated article, a direction parallel to its length extension is defined as "axial"; for an object with a circular cross-section, the direction surrounding its axis is defined as "circumferential".

The application provides a ureteral stent tube when being used for the uroflow to change patient and carrying out the stent tube and change, has the function of ureteral orifice expansion to form a cavity through the sheath pipe, be convenient for the ureter inserts and pulls out in the cavity, thereby realize the change of stent tube, efficiency is higher, and the security is better, also the damage of reduction ureter of great degree, and the operation is very simple, does not need the doctor that experience is abundant to operate, can use equally to the medical treatment that low-year doctor and basic unit hospital developed routinely.

In a preferred embodiment, the distal end of the sheath 2 of the ureteral stent according to the present utility model has a slope 3, as shown in fig. 1, said slope 3 being in elastic contact with the outer surface of said stent 1.

During operation, the slope 3 enables the sheath 2 to enter more easily when the sheath 2 is inserted into a human body, and damage to mucosal tissues in the human body cavity is avoided.

In a preferred embodiment, the ramp 3 is made of silica gel or polyurethane.

The silica gel or polyurethane material has soft and has the characteristic of certain rigidity, not only can satisfy the rigidity requirement when sheath pipe 2 inserts the human body, and its soft characteristic also can avoid causing the damage to human intracavity mucosal tissue, and has certain elasticity, can make the sheath pipe 2 and the inseparabler of support pipe 1 laminating, is convenient for insert the human body, and avoids causing the damage to human intracavity mucosal tissue.

The sheath tube 2 can be made of any one of various materials, such as PVC, PP, PTFE, silica gel and the like, or a structural combination thereof.

In a preferred embodiment, the stent tube 1 may be purchased commercially or may be self-made, and preferably the outer diameter of the stent tube 1 is 2 to 5mm, for example, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm.

In a preferred embodiment, the sheath 2 may be commercially available or self-made, and preferably the inner diameter of the cross section at the distal end of the ramp 3 of the sheath 2 is 0.1-1 mm wider than the outer diameter of the stent 1, for example 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, for example the inner diameter of the cross section at the distal end of the ramp 3 may be 2.1mm, 3.1mm, 4.1mm, 5.1mm, 2.2mm, 3.2mm, 4.2mm, 5.2mm, 2.3mm, 3.3mm, 4.3mm, 2.4mm, 3.4mm, 4.4mm, 5.4mm, 2.5mm, 4.5mm, 5.5mm, 2.6mm, 3.6mm, 4.6mm, 5.6mm, 7.7.2 mm, 7.2 mm, 8.9 mm, 4.2mm, 9.3 mm.

In a preferred embodiment, the length of the stent tube 1 is 30 to 80cm, for example, 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70cm, 75cm, preferably 30 to 50cm.

In a preferred embodiment, the sheath 2 has a length of 20 to 30cm, for example 21, 22, 23, 24, 25, 26, 27, 28, 29cm, preferably 20 to 25cm.

In a preferred embodiment, the outer surface of the stent tube 1 is provided with a hydrophilic coating, which can avoid embedding surrounding tissues, improve stent functions, improve patient tolerance, reduce complications such as infection, and simultaneously, the hydrophilic coating can enable the sheath tube 2 to be inserted into a human body more easily when the stent tube 1 is sleeved, so that damage to mucosal tissues in a human body cavity is avoided.

The stent tube 1 is made of polyurethane medical material.

In a preferred embodiment, the sheath 2 has graduations to facilitate the operator's view of the length of insertion of the sheath 2 into the human body to make accurate determinations.

When the ureteral stent of the utility model is used for the first time, the stent tube 1 is put into a ureteral cavity along a medical guide wire, and after the guide wire is withdrawn, the bent end of the stent tube 1 is bent and left in the renal pelvis. When the patient needs to be replaced periodically afterwards, the sheath tube 2 can be accessed along the straight end of the stent tube 1, the access length is related to the ureter length remained after the operation of the patient, and the X-ray or the ultrasound can be combined. When the entering length can be defined, the external part of the sheath tube 2 is kept in place in a handheld manner, and the stent tube 1 is pulled out; after that, when a new stent tube is put into the inner cavity of the sheath tube 2, the ureteral stent tube has the function of expanding the ureteral orifice, and a cavity is formed through the sheath tube, so that the ureter can be conveniently inserted into and pulled out of the cavity, the replacement of the stent tube is realized, the efficiency is higher, the safety is better, the damage of the ureter is also reduced to a greater extent, the operation is very simple, the operation is not required by a doctor with abundant experience, and the ureteral orifice stent tube can be used for medical measures which are conventionally developed by a doctor with low annual resources and a basic hospital.

Although the embodiments of the present utility model have been described above in connection with the above, the present utility model is not limited to the above-described specific embodiments and fields of application, which are merely illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous forms of the utility model without departing from the scope of the utility model as claimed.

Claims (2)

1. The ureteral stent for the patient with the diversion of the urine flow is characterized by comprising a stent tube and a sheath tube, wherein the stent tube and the sheath tube are sleeved, the stent tube can be inserted and pulled out in the sheath tube, the stent tube is a single J tube, the distal end of the sheath tube is provided with a slope, the slope is in elastic contact with the outer surface of the stent tube, the outer diameter of the stent tube is 2-5 mm, the inner diameter of the cross section at the distal end of the slope is 0.1-1 mm wider than the outer diameter of the stent tube, the length of the sheath tube is 20-30 cm, the length of the stent tube is 30-50 cm, and the sheath tube is provided with scales.

2. The ureteral stent tube according to claim 1, characterized in that the sheath has a length of 20-25 cm.