CN216877528U

CN216877528U - Ureteral catheter assembly

Info

Publication number: CN216877528U
Application number: CN202220052001.0U
Authority: CN
Inventors: 李�权; 徐岗村
Original assignee: Suzhou Municipal Hospital
Current assignee: Suzhou Denuo Medical Equipment Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-07-05
Anticipated expiration: 2032-01-10

Abstract

The present invention relates to a ureteral catheter assembly comprising: the outer sleeve comprises an opening end and a water injection end; the zebra guide wire catheter is removably inserted into the outer sleeve and is in clearance fit with the outer sleeve; the zebra guide wire catheter has an introduction end extending out of the open end of the outer sleeve, and a removal pulling end extending out of the water injection end of the outer sleeve. The zebra guide wire catheter is removably inserted into the outer sleeve and is in clearance fit with the outer sleeve, the inner diameter of the zebra guide wire catheter is matched with the zebra guide wire, and the outer sleeve with the relatively large inner diameter can be conveniently guided into the human ureter through the zebra guide wire catheter so as to conveniently inject water into the ureter through the outer sleeve.

Description

Ureteral catheter assembly

Technical Field

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

Background

Urinary calculus is one of the most common diseases in urology surgery, and percutaneous nephrolithotomy is a relatively common minimally invasive treatment method. The brief preoperative preparation process comprises the following steps: after a patient is anesthetized, the lithotomy position is taken firstly, the patient is examined and evaluated by a conventional affected ureteroscope whether the affected ureter has the situations of stenosis, occupation and the like, particularly for the patient with the calculus of the upper ureter, the calculus at the upper end of the ureter can be pushed back into a renal pelvis under the ureteroscope so as to be removed together in a percutaneous nephroscope operation, and meanwhile, a zebra guide wire is reserved and a ureter catheter is reserved. After the successful catheterization, the patient takes the prone position or the lateral position, water is injected into the ureteral catheter which is placed into the patient to cause artificial hydronephrosis, a proper puncture cup is selected to puncture under the guidance of B-ultrasound, an operation channel sheath is established, holmium laser or ballistic lithotripsy is performed, and water is injected into the ureteral catheter which is placed into the patient in the operation to assist the crushed small stones to be discharged from the established renal channel.

The percutaneous nephrolithotomy needs to keep a ureteral catheter at a lithotomy position for water injection, the diameter of the ureteral catheter which is commonly used clinically at present is matched with a zebra guide wire, the ureteral catheter can be conveniently guided into a human ureter through the zebra guide wire, the zebra guide wire is pulled out of the human body after the ureteral catheter is guided into the human body, the ureteral catheter is kept in the human body, and the end part of the ureteral catheter exposed out of the human body is connected with an injector for water injection.

The inner diameter of the current ureter catheter is matched with a zebra guide wire, so that the inner diameter of water injection is relatively small, and the water injection efficiency is relatively low. If a catheter with a relatively large inner diameter is used for water injection in order to improve the water injection efficiency, a relatively large gap exists between the inner diameter of the catheter and the zebra guide wire. In this case, if the zebra guide wire is directly used to introduce the catheter with a large inner diameter into the ureter of the human body, the catheter may be folded or twisted in the ureter during the introduction into the ureter of the human body, and cannot be smoothly introduced into the ureter of the human body along the zebra guide wire, which may affect the water injection into the ureter through the catheter.

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In order to overcome the defects in the prior art, the utility model provides a ureteral catheter assembly, wherein a zebra guide wire catheter is removably inserted into an outer sleeve and is in clearance fit with the outer sleeve, the inner diameter of the zebra guide wire catheter is matched with the zebra guide wire, and the outer sleeve with a relatively large inner diameter can be conveniently guided into a human ureter through the zebra guide wire catheter so as to conveniently inject water into the ureter through the outer sleeve.

Means for solving the problems

According to a first aspect of embodiments of the present invention, there is provided a ureteral catheter assembly, comprising:

the outer sleeve comprises an opening end and a water injection end;

the zebra guide wire catheter is removably inserted into the outer sleeve and is in clearance fit with the outer sleeve; the zebra guide wire catheter is provided with a leading-in end extending out of the open end of the outer sleeve and a removing and drawing end extending out of the water injection end of the outer sleeve.

Optionally, the distance that the leading-in end extends out of the open end of the outer sleeve is less than or equal to 1 cm.

Optionally, the water injection end of the outer sleeve is provided with a water injection connector, and the water injection connector is provided with a first pair of interfaces butted with the water injection end of the outer sleeve and a water injection interface communicated with the first pair of interfaces; the inner diameter of the water injection interface of the water injection connecting piece is larger than the inner diameter of the outer sleeve.

Optionally, a mating thread is provided at the water injection interface of the water injection connector.

Optionally, the leading-in end of the zebra guide wire catheter is provided with a wire threading hole.

Optionally, the outer sleeve is provided with at least one water injection hole at a position close to the open end.

Optionally, the zebra guidewire catheter comprises a constriction at the introduction end; the outer diameter of the contraction section gradually decreases along the direction in which the zebra guide wire catheter extends and points to the introduction end.

Optionally, the outer surface of the outer sleeve is provided with a plurality of length markers for marking the length of the position of the length markers from the guiding end of the zebra guide wire catheter.

Optionally, in the plurality of length markers, the distance between the length marker close to the introduction end of the zebra guide wire catheter and the end of the introduction end is less than 30 cm.

Optionally, the length markings are annular graduations formed on the outer circumference of the outer sleeve.

Effect of the utility model

The utility model provides a ureteral catheter assembly, wherein a zebra guide wire catheter is removably inserted into an outer sleeve and is in clearance fit with the outer sleeve, the inner diameter of the zebra guide wire catheter is matched with a zebra guide wire, and the outer sleeve with a relatively large inner diameter can be conveniently guided into a human ureter through the zebra guide wire catheter so as to conveniently inject water into the ureter through the outer sleeve.

Drawings

Fig. 1 is a front view of a schematic of a ureteral catheter assembly.

Fig. 2 is a top view of a schematic of a ureteral catheter assembly.

FIG. 3 is a cross-sectional view of the ureteral catheter assembly shown in FIG. 2 taken along the direction A-A.

Description of the drawing

100. A ureteral catheter assembly; 110. an outer sleeve; 111. an open end; 112. a water injection end; 1121. a water injection connecting piece; 1122. a water injection interface; 1123. a first pair of interfaces; 1124. a contraction section; 113. a water injection hole; 120. a zebra guidewire catheter; 121. a lead-in end; 122. removing the pulling end; 123. and (4) threading holes.

Detailed Description

In order to make the technical solution and advantages of the present invention more comprehensible, a detailed description is given below by way of specific examples. Wherein the figures are not necessarily to scale, and certain features may be exaggerated or minimized to more clearly show details of the features; unless defined otherwise, technical and scientific terms used herein have the same meaning as those in the technical field to which this application belongs.

In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of simplifying the description of the present invention, but do not indicate that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, the terms "first" and "second" are used for descriptive clarity only and are not to be construed as relative importance of the indicated features or number of the indicated technical features. Thus, a feature defined as "first" or "second" may expressly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc.; "several" means at least one, e.g., one, two, three, etc.; unless explicitly defined otherwise.

In the present invention, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly unless expressly limited otherwise. For example, "connected," may be fixedly connected, or detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly defined otherwise, the first feature may be "on", "above" and "above", "below", "beneath", "below" or "beneath" the second feature such that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be that the first feature is directly on or obliquely above the second feature, or simply means that the first feature has a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a level less than the second feature.

An embodiment of the present invention provides a ureteral catheter assembly 100, as shown in particular in fig. 1-3. Ureteral catheter assembly 100 includes an outer sleeve 110 and a zebra guidewire catheter 120. The zebra guide wire catheter 120 is removably inserted into the outer sleeve 110 and is in clearance fit with the outer sleeve. The outer sleeve 110 includes an open end 111 and a water injection end 112. The zebra guide wire catheter 120 has a lead-in end 121 that extends out of the open end 111 of the outer sleeve 110, and a removal pull end 122 that extends out of the water injection end 112 of the outer sleeve 110.

Through the structural design, the zebra guide wire catheter 120 is removably inserted into the outer sleeve 110 and is in clearance fit with the outer sleeve 110, the inner diameter of the zebra guide wire catheter 120 is matched with the zebra guide wire, the outer sleeve 110 with the relatively large inner diameter can be conveniently guided into a human ureter through the zebra guide wire catheter 120, so that water can be conveniently injected into the ureter through the outer sleeve in a percutaneous nephroscope lithotripsy operation, artificial hydronephrosis is established, and a percutaneous nephrosis operation channel is conveniently established through B-mode ultrasonic puncture in the operation. During percutaneous nephrolithotomy, water is injected through the built-in outer sleeve to assist in discharging calculus in the lithotomy through the percutaneous renal channel, and small calculus in the lithotomy can be prevented from falling into a ureter of a human body to a certain extent to influence the operation effect.

Optionally, the outer diameter of the outer cannula 110 is adapted to the body ureter to prevent tiny debris generated during the operation from falling between the body ureter and the outer cannula, which may affect the effect of the percutaneous nephrolithotripsy operation.

Alternatively, the length of the outer sleeve 110 may have a gauge of 70cm for male patients and 60cm for female patients. The outer casing 110 of different length and size is designed for male and female patients because the female urethra is about 15-20cm shorter than the male urethra. If the male and female patients use the outer tube 110 having a length of 60cm, the female patient is suitable, and the leaking portion is too short for the male patient, which makes it inconvenient to connect the water filling device to perform the water filling operation on the patient. If both male and female patients have an outer casing 110 with a length of 70cm, the outer casing is suitable for male patients, but for female patients, the leaking part is too long and easy to be pulled, and potential safety hazards may exist. The outer diameter of the zebra guidewire catheter 120 currently has two specifications, 0.2cm and 0.24 cm.

In the ureteral catheter assembly 100 provided by the present invention, the zebra guide-wire catheter 120 is removably inserted into the outer sheath 110 and is in clearance fit with the outer sheath 110, specifically, the outer peripheral surface of the zebra guide-wire catheter 120 and the inner peripheral surface of the outer sheath 110 are attached or maintain a small fit clearance, and the inner diameter of the zebra guide-wire catheter 120 is adapted to the zebra guide-wire, so that the outer sheath 110 sleeved thereon can be driven to enter the ureter along with the zebra guide-wire while the zebra guide-wire catheter 120 is guided into the ureter, and thus the outer sheath 110 with a relatively large inner diameter can be conveniently guided into the ureter through the zebra guide-wire catheter 120, so as to prevent the outer sheath 110 from being folded or twisted in the ureter during the process of guiding the outer sheath 110 into the ureter, so that the outer sheath 110 can be smoothly guided into the ureter, and facilitate water injection into the ureter through the outer sheath 110, so as to successfully find the renal pelvis orifice, establish an operation channel and find a puncture inlet, thereby improving the success rate of percutaneous nephrolithotomy.

By removably inserting the zebra guide wire catheter 120 into the outer sleeve 110, the ureteral catheter assembly can be conveniently guided to a proper position in a human ureter, specifically, when the zebra guide wire catheter 120 is guided to a position where the zebra guide wire catheter is contacted with the renal pelvis, the zebra guide wire is pulled out of the human ureter, and the outer sleeve 110 is kept in the human ureter. The outer casing 110 comprises an open end 111 and a water injection end 112, the open end 111 is positioned in the body near the renal pelvis, and the open end 111 is used as a water injection port of the outer casing 110; the water injection end 112 is exposed outside the human body and is connected with an external water injection device through the water injection end 112, so that water can be conveniently injected into the human body ureter through the outer sleeve 110. The water injection means includes, but is not limited to, a water injection member such as a syringe. Because the inner diameter of the outer sleeve 110 is larger than that of the prior common ureteral catheter, the efficiency of injecting water into the ureteral of a human body can be effectively improved, thereby improving the implementation efficiency of the percutaneous nephrolithotripsy operation.

Specifically, the leading end 121 extends out of the open end 111 of the outer sleeve 110 by a distance of 1cm or less. By setting the distance, the opening end 111 of the outer sleeve 110 is better attached to the surface of the zebra guide wire catheter 120, so that a large gap between the end part of the opening end 111 and the end part of the leading-in end 121 is avoided, the outer sleeve 110 is influenced to smoothly follow the zebra guide wire catheter 120 to enter the human ureter, and the outer sleeve is smoothly led into the human ureter under the driving of the zebra guide wire catheter. On the other hand, the zebra guide wire catheter 120 is removably inserted into the outer sleeve 110, when the ureteral catheter assembly 100 is guided to a position where the zebra guide wire catheter 120 contacts with the renal pelvis by matching the zebra guide wire catheter 120 with the zebra guide wire, the zebra guide wire catheter 120 is pulled away, the outer sleeve 110 is kept in the urinary catheter of the human body, because the distance from the leading end 121 of the zebra guide wire catheter 120 to the opening end 111 of the outer sleeve 110 is less than or equal to 1cm, after the zebra guide wire catheter 120 is pulled away, the opening end 111 of the outer sleeve 110 is still positioned at a position close to the renal pelvis of the human body, water can be conveniently injected into the renal pelvis through the opening end 111 of the outer sleeve 110 during water injection operation, artificial hydronephrosis is produced, so as to conveniently find the renal pelvis mouth required by the percutaneous nephrolithotomy operation, establish a percutaneous nephrolithotomy operation channel, and assist in accurately finding the puncture mouth.

In this embodiment, the water filling end 112 of the outer sleeve 110 of the present invention has a water filling connector 1121, and the water filling connector 1121 has a first pair of ports 1123 butted with the water filling end 112 of the outer sleeve 110, and a water filling port 1122 communicated with the first pair of ports 1123; the water filling connector 1122 of the water filling connection 1121 has an inner diameter larger than that of the outer tube 110. The water injection connector 1121 is connected to a water injection device, so that the outer sleeve 110 is conveniently connected with an external water injection device, and the water injection efficiency is further improved.

Specifically, the water injection connector 1122 of the water injection connector 1121 is provided with a mating thread, so that the outer sleeve 110 is tightly connected to an external water injection device, thereby preventing loosening and improving the success rate of water injection. Taking an injector as an example of the water injection device, the existing scalp acupuncture kit is used, the needle-carrying part is removed, the hose and the short hose are retained, and the hose is fitted over the water injection port 1122 of the water injection connector 1121 to inject water. The design can prevent the hands of medical staff from being punctured by the needle head in the operation, and the sleeve pipe is not easy to fall off and leak water, thereby improving the water injection efficiency. It should be noted that the water injection device of the present invention is not limited to the syringe.

In this embodiment, the leading-in end 121 of the zebra guidewire catheter 120 is provided with a threading hole, the threading hole is matched with a zebra guidewire, and the zebra guidewire catheter 120 is threaded on the zebra guidewire, so that the ureteral catheter assembly 100 can be conveniently led into a human ureter. Specifically, the zebra guide wire catheter 120 is guided into the ureter along the zebra guide wire inserted therein, and simultaneously drives the outer sleeve 110 which is in clearance fit with the zebra guide wire catheter 120 into the ureter. Through the design of arranging the wire penetrating hole at the leading-in end of the zebra guide wire catheter instead of adopting the design of smoothly sealing the round head at the leading-in front end, the operation of shearing off the sealing head end when the zebra guide wire needs to be penetrated is avoided, the operation of shearing off the sealing head end can cause the length mark of the outer surface of the outer sleeve 110 to be different from the actual length, so that the operation operator can not accurately judge the length of the ureteral catheter assembly led into the human body. In this embodiment, a thread hole is formed at the leading-in end of the zebra guide wire catheter, and the zebra guide wire penetrates into the thread hole, so that the actual length of the ureteral catheter assembly is not affected due to the fact that the closed end does not need to be cut off, the use is convenient, and the surgical operation personnel can be helped to accurately judge the length of the ureteral catheter assembly led into the human body.

In this embodiment, at least one water injection hole 113 is disposed near the open end 111 of the outer sleeve 110. In this embodiment, the sidewall of the outer sleeve 110 is provided with 8 water injection holes 113, and the 8 water injection holes 113 are symmetrically arranged on the sidewall of the outer sleeve 110. It should be noted that the number of the water injection holes 113 is not limited to 8, and one, two, three, four, etc. may be provided according to specific needs. The water injection hole 113 injects water together with the open end 111 of the outer tube 110, thereby further improving the water injection efficiency.

Further, the zebra guidewire catheter 120 comprises a narrowing 1124 at the introduction end 121; the outer diameter of the constricted section 1124 decreases gradually in the direction that the zebra guidewire catheter 120 extends and points towards the introduction end 121. Through the above structural design, the introduction end 121 of the zebra guidewire catheter 120 is relatively smooth, and in some embodiments, the introduction end 121 of the zebra guidewire catheter 120 is a circular arc. The introduction end 121 of the present invention is not limited to the circular arc shape, and may be designed into another shape, such as an elliptical arc shape, according to specific needs. Through the design, the guide end 121 of the zebra guide wire catheter 120 is relatively smooth, so that the main body of the ureteral catheter assembly 100 can conveniently penetrate into a ureter of a human body, and discomfort can not be caused to a patient in the penetrating process.

Specifically, the outer surface of the outer sleeve 110 is provided with a plurality of length markers for marking the length of the length markers from the leading end 121 of the zebra guide wire catheter 120. The maximum distance of the length mark is 30 cm. With the above-described structural design, it is convenient to observe the length of the main body of the ureteral catheter assembly 100 entering the ureter, so as to prevent the ureteral catheter assembly 100 from entering the human ureter too long, which causes a part of the ureteral catheter assembly 100 to fold or twist in the ureter, and even if the zebra guide wire catheter 120 is removed from the outer sleeve 110, a part of the outer sleeve 110 may fold or twist in the ureter, which affects water injection.

Further, the length mark is an annular scale mark formed on the periphery of the outer sleeve 110, so that the ureteroscope placed in the bladder of a human body can conveniently observe the length of the ureter entering the ureter of the ureter catheter assembly 100 in all directions, and transmit the observed data to a display device such as a display screen, and an operation operator can conveniently know the condition of the ureter catheter assembly introduced into the ureter.

The using method comprises the following steps:

fixing the zebra guide wire to the renal pelvis;

the ureteroscope is placed into the bladder; the depth of the ureteral catheter assembly entering the ureter and the condition of folding or twisting of the ureteral catheter assembly in the guiding process can be conveniently observed, and the observation result is transmitted to display devices such as a display screen;

the zebra guide wire passes through a wire passing hole of a zebra guide wire catheter 120 of the ureteral catheter assembly, and the zebra guide wire catheter 120 is led into the ureter along the zebra guide wire to drive the outer sleeve 110 to be led into the ureter;

when the length of the ureter catheter component entering the ureter reaches the length mark of 30cm, stopping introducing the ureter catheter component into the ureter;

the zebra guide wire is pulled out of the ureteral catheter assembly, then the zebra guide wire catheter 120 is pulled out of the human body, and the outer sleeve 110 is reserved at the position close to the renal pelvis in the ureter;

an external water injection means, such as a syringe, is connected through the water injection connector 1121 of the outer tube 110, and water is injected into the outer tube 110 through the water injection means to establish a surgical pathway.

According to the ureteral catheter assembly 100 provided by the utility model, the zebra guide wire catheter 120 is removably inserted into the outer sleeve 110 and is in clearance fit with the outer sleeve 110, the inner diameter of the zebra guide wire catheter 120 is matched with the zebra guide wire, and the zebra guide wire catheter 120 can conveniently guide the outer sleeve 110 with a relatively large inner diameter into a human ureter through the inner catheter of the inner ureteral catheter, so that water can be conveniently injected into the ureter through the outer sleeve 110.

It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and changes may also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Likewise, various features of the above embodiments may be arbitrarily combined to form additional embodiments of the present invention that may not be explicitly described. Therefore, the above examples only represent some embodiments of the present invention, and do not limit the scope of the present invention.

Claims

1. A ureteral catheter assembly, comprising:

an outer sleeve (110) comprising an open end (111) and a water injection end (112);

the zebra guide wire catheter (120) is removably inserted into the outer sleeve (110) and is in clearance fit with the outer sleeve; the zebra guide wire catheter (120) has an introduction end (121) extending out of the open end (111) of the outer sleeve (110), and a removal pulling end (122) extending out of the water injection end (112) of the outer sleeve (110).

2. The ureteral catheter assembly according to claim 1, wherein the lead-in end (121) extends beyond the open end (111) of the outer sleeve by a distance of 1cm or less.

3. The ureteral catheter assembly according to claim 1, wherein the water injection end (112) of the outer sleeve (110) has a water injection connection (1121), the water injection connection (1121) having a first pair of interfaces (1123) interfacing with the water injection end (112) of the outer sleeve (110), and a water injection interface (1122) communicating with the first pair of interfaces (1123); the inner diameter of the water filling connector (1122) of the water filling connector (1121) is larger than the inner diameter of the outer sleeve (110).

4. The ureteral catheter assembly according to claim 3, wherein mating threads are provided at the water injection interface (1122) of the water injection connector (1121).

5. The ureteral catheter assembly according to claim 1, wherein the introduction end (121) of the zebra guide wire catheter (120) is provided with a threading hole (123).

6. The ureteral catheter assembly according to claim 1, wherein the outer sleeve (110) is provided with at least one water injection hole (113) near the open end.

7. The ureteral catheter assembly according to claim 1, wherein the zebra guidewire catheter (120) includes a constriction (1124) at the introduction end (121); the outer diameter of the constriction (1124) decreases gradually in a direction in which the zebra guidewire catheter (120) extends and is directed towards the introduction end (121).

8. The ureteral catheter assembly according to claim 1, wherein the outer surface of the outer sleeve (110) is provided with a plurality of length markings for marking the length of the length markings located a distance from the introduction end (121) of the zebra guidewire catheter (120).

9. The ureteral catheter assembly according to claim 8, wherein the length indicator mark has a maximum distance of 30 cm.

10. The ureteral catheter assembly according to claim 9, wherein the length markings are annular graduations formed on the outer circumference of the outer cannula (110).