CN209629916U - A kind of ureter bracket - Google Patents

Abstract

The utility model discloses a ureter support, which comprises a tube body and a degradable cap, and the degradable cap is detachably connected with the opening at the far end of the tube body. By adding a degradable cap, the distal end of the ureteral stent can always be in an occluded state during the placement of the ureteral stent, and the use of the degradable cap as a pioneer in the placement of the ureteral stent effectively avoids the first ureteral stent in the prior art Existing problems: Since the degradable cap will automatically degrade after being placed in a predetermined time, the opening of the distal end of the tube body is exposed (that is, the distal end of the ureteral stent is open), which facilitates the subsequent replacement of the ureteral stent. Effectively avoid the problems existing in the second ureteral stent in the prior art.

Description

A ureteral stent

technical field

The utility model relates to the technical field of medical instruments, in particular to a ureteral support.

Background technique

Ureteral stent is a commonly used consumable in urology. It is a long and thin flexible tube that leads from the kidney to the bladder. Doctors often first choose to insert a ureteral stent under cystoscopy to prevent or improve hydronephrosis. This operation causes minimal trauma to the patient and hardly affects the normal life of the patient after the implantation. However, when this method fails, patients often have to be advised to undergo percutaneous nephropuncture to relieve hydronephrosis. This operation is traumatic to the patient, and the urine bag needs to be carried for a long time, which brings great inconvenience to the life of the patient.

At present, the double-J tube ureteral stent is most commonly used clinically. Because some patients have severe hydronephrosis or a certain degree of obstruction that cannot be treated in time, long-term indwelling ureteral stents are required. Existing ureteral stents are classified according to the insertion method, and clinically commonly used are divided into two types: the first type is an anterior opening ureteral stent, and the second type is an anterior segment occlusion ureteral stent. Wherein, for the first kind of ureteral stent clinically, a guide wire is used to guide the approach, and then the method of inserting the ureteral stent is placed. However, the problems often encountered in the clinical use of the first ureteral stent are as follows: 1) It needs to be guided by a guide wire, and the guide wire needs to be inserted with a soft end due to its metal material. Due to the special angle of the opening of the ureter, the soft tip of the guide wire is unable to press the bladder mucosa and cannot enter the ureter at an appropriate angle, which increases the difficulty of ureteral stent placement. 2) After the soft-tip guide wire enters the ureter, the ureter of some patients is squeezed, so a catheter with a certain hardness is required to stretch it to enter the predetermined position. At this time, the soft guide wire will bend after encountering resistance, so as to As for the inability to judge whether the guide wire preset is in place during the operation, it leads to the misplacement of the subsequent stent placement, which brings great inconvenience to the clinical operation. 3) At the same time, because the soft guide wire is relatively thin, and the front opening of the ureteral stent may form friction with the tube wall when entering the ureter, the soft guide wire cannot fully guarantee the smooth placement of the subsequent ureteral stent after entering the ureter. For the second type of stent, clinically, the hard end of the guide wire is used to withstand the occluded end of the stent and enter the ureter to be placed into the renal pelvis. However, the problem often encountered in the clinical use of the second ureteral stent is that although one end of the second ureteral stent is a occluded end (i.e. a blind end), which avoids the three disadvantages of the first guide wire, many patients Faced with the situation of long-term placement of ureteral stents, and the clinically commonly used ureteral stents can be placed continuously for 5 to 12 months. Therefore, for such patients, ureteral stents should be replaced regularly. For the second type of stent, When replacing, the original ureteral stent needs to be removed first and a new ureteral stent should be inserted again. However, because the front end of the original ureter is an occluded end, factors such as ureteral spasm, long-term placement of foreign bodies, and patient’s disease progression will greatly affect the replacement. Increases the difficulty of reinserting a ureteral stent, thus increasing the likelihood of failure to replace the ureteral stent, in which case the patient may be forced to undergo percutaneous nephrostomy.

Aiming at the problems existing in the existing ureteral stents, those skilled in the art have been looking for solutions.

Utility model content

The purpose of the utility model is to provide a ureteral stent to solve the problems existing in the ureteral stent in the prior art.

In order to solve the above technical problems, the utility model provides a ureteral stent, the ureteral stent includes a tube body and a degradable cap, and the degradable cap is detachably connected to the opening at the distal end of the tube body.

Optionally, in the ureteral stent, an internal thread is provided on the inner side of the body wall at the distal end of the tubular body, and an external thread matching the internal thread is provided on the degradable cap.

Optionally, in the ureteral stent, the degradable cap is mushroom-shaped.

Optionally, in the ureteral stent, the degradable cap includes a mushroom cap and a mushroom handle connected with the mushroom cap, and the external thread is arranged outside the mushroom handle.

Optionally, in the ureteral stent, the diameter of the mushroom cap is equal to the diameter of the distal end of the tubular body.

Optionally, in the ureteral stent, the material of the degradable cap is a degradable polysaccharide material or a biodegradable polymer material.

Optionally, in the ureteral stent, both the proximal end and the distal end of the tubular body are J-shaped.

In the ureteral stent provided by the present invention, the ureteral stent includes a tube body and a degradable cap, and the degradable cap is detachably connected to the opening at the distal end of the tube body. By adding a degradable cap, the distal end of the ureteral stent can always be in an occluded state during the placement of the ureteral stent, and the use of the degradable cap as a pioneer in the placement of the ureteral stent effectively avoids the first ureteral stent in the prior art Existing problems: Since the degradable cap will automatically degrade after being placed in a predetermined time, the opening of the distal end of the tube body is exposed (that is, the distal end of the ureteral stent is open), which facilitates the subsequent replacement of the ureteral stent. Effectively avoid the problems existing in the second ureteral stent in the prior art.

Description of drawings

Fig. 1 is a schematic diagram of a longitudinal section of a ureteral stent in an embodiment of the utility model;

Fig. 2 is a schematic structural view of a degradable cap in an embodiment of the present invention.

In the figure: 1-tube body; 10-distal end; 11-proximal end; 2-degradable cap.

Detailed ways

The ureteral stent proposed by the utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the utility model will be more clear. It should be noted that all the drawings are in very simplified form and use inaccurate scales, which are only used to facilitate and clearly illustrate the purpose of the embodiment of the present utility model.

As used herein, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions relative to each other from the perspective of a physician using the medical device, although "proximal" and "distal" Without being limiting, "proximal" generally refers to the end of the medical device that is closest to the physician during normal operation, and "distal" generally refers to the end that enters the patient first.

Herein, "inner" or "inner side" refers to a direction close to the axis of the stent, and "outer" or "outer side" refers to a direction away from the axis of the stent.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

Please refer to FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of a longitudinal section of the ureteral stent of the present invention; FIG. 2 is a schematic diagram of the structure of the degradable cap in this embodiment. As shown in FIGS. 1 and 2 , the ureteral stent includes: a tubular body 1 and a degradable cap 2 , and the degradable cap 2 is detachably connected to the opening of the distal end 10 of the tubular body 1 . Specifically, the inner side of the body wall of the distal end 10 of the tubular body 1 is provided with an internal thread, and the degradable cap 2 is provided with an external thread matching the internal thread.

It can be understood that the degradable cap 2 is detachably connected to the opening of the distal end 10 of the tubular body 1, including but not limited to the matching knob of the internal thread and the external thread to realize the detachable connection of the two structures, and also It can be realized by means of buckle butt joint or the like.

As shown in FIG. 2 , the degradable cap 2 is mushroom-shaped, and the degradable cap 2 includes a mushroom cap and a mushroom handle connected with the mushroom cap, and the external thread is arranged outside the mushroom handle. Preferably, the diameter of the mushroom cap is equal to the diameter of the distal end 10 of the tubular body 1 .

Preferably, the material of the degradable cap 2 is a degradable polysaccharide material or a biodegradable polymer material.

Further, both the proximal end and the distal end of the tubular body are J-shaped, and the ureteral stent formed by this structure is a double-J tube ureteral stent.

The ureteral stent based on the utility model realizes both the advantages of the first type of ureteral stent and the second type of ureteral stent in the background technology, and at the same time avoids the shortcomings of the two, effectively increasing the success rate of ureteral stent placement and replacement , reduce the pain caused by clinical operations to patients, and meet the actual clinical needs.

Taking the ureteral stent as an example of a double J-tube ureteral stent below, the principle of the application of the ureteral stent of the present utility model is described in detail in conjunction with Fig. 1 and Fig. 2:

The procedure of inserting the ureteral stent of the present utility model is similar to that of the ureteral stent with one end being the occluded end in the background art, except that before the insertion, firstly, the degradable cap 2 and the distal end 10 of the tube body 1 need to be connected into one body, Figure 1 is to realize the connection by matching the external thread with the internal thread; then, the hard end of the guide wire is pushed against the distal end 10 of the ureteral stent until the degradable cap 2 is placed into the position of the ureteral pelvis, and then the guide wire is withdrawn. Ureteral stent placement completed. It can be seen that when the ureteral stent is placed for the first time, based on the cooperation of the hard end of the guide wire and the degradable cap 2, it can effectively avoid the failure of partial stent placement and the difficulty of clinical operation due to the relatively soft material of the soft end of the guide wire. The problem (that is, the problem existing in the clinical use of the first ureteral stent in the background technology).

When the ureteral stent needs to be replaced, it is often necessary to replace the ureteral stent after the ureteral stent has been placed for more than about 5 months. At this time, the degradable cap 2 has been completely degraded. The degradable cap 2 of the opening of the distal end 10 of the tube body 1 is degraded and disappears, and the opening of the distal end 10 of the tube body 1 is exposed); first, the original ureteral stent is pulled out to the easy-to-operate position, and the guide wire is moved close to the original ureteral stent Put the end 11 into the position of the renal pelvis, then withdraw the original ureteral stent along the guide wire, and then place the new ureteral stent into the position of the renal pelvis along the guide wire, so far the replacement of the new ureteral stent is completed. Since the distal end 10 of the ureteral stent is in an open state when the ureteral stent is replaced, the difficulty of pulling out the original ureteral stent is reduced, the loss to the patient is reduced, and the success rate of ureteral stent placement is improved.

To sum up, in the ureteral stent provided by the present invention, the ureteral stent includes a tube body and a degradable cap, and the degradable cap is detachably connected to the opening at the distal end of the tube body. By adding a degradable cap, the distal end of the ureteral stent can always be in an occluded state during the placement of the ureteral stent, and the use of the degradable cap as a pioneer in the placement of the ureteral stent effectively avoids the first ureteral stent in the prior art Existing problems: Since the degradable cap will automatically degrade after being placed in a predetermined time, the opening of the distal end of the tube body is exposed, which facilitates the subsequent replacement of ureteral stents and effectively avoids the second type of ureteral stent in the prior art. Problems with brackets. Further, when the ureteral stent needs to be replaced, the degradable cap has degraded and disappeared, the guide wire is put into the proximal end of the original ureteral stent until it reaches the opening of the distal end of the original ureteral stent, and the original ureteral stent is inserted along the The guide wire withdraws from the insertion position, and then a new ureteral stent is placed to the insertion position along the guide wire, and the replacement of the new ureteral stent is completed. Based on the ureteral stent of the utility model, the operation of replacing the ureteral stent can be realized relatively easily, the loss caused to the patient is reduced, and the success rate of ureteral stent placement is improved.

Apparently, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model is also intended to include these modifications and variations.

Claims (7)

1. A ureteral stent, characterized in that it comprises a tubular body and a degradable cap, and the degradable cap is detachably connected to the opening at the distal end of the tubular body. 2. The ureteral stent according to claim 1, wherein an internal thread is provided on the inner side of the distal body wall of the tubular body, and an external thread matching the internal thread is provided on the degradable cap. 3. The ureteral stent according to claim 1, wherein the degradable cap is mushroom-shaped. 4. The ureteral stent according to claim 2, wherein the degradable cap comprises a mushroom cap and a mushroom handle connected with the mushroom cap, and the external thread is arranged outside the mushroom handle. 5. The ureteral stent according to claim 4, wherein the diameter of the mushroom cap is equal to the diameter of the distal end of the tubular body. 6. The ureteral stent according to claim 1, wherein the material of the degradable cap is a degradable polysaccharide material or a biodegradable polymer material. 7. The ureteral stent according to claim 1, wherein both the proximal end and the distal end of the tubular body are J-shaped.