CN219579691U

CN219579691U - urinary catheter

Info

Publication number: CN219579691U
Application number: CN202320809497.6U
Authority: CN
Inventors: 王建龙; 吕政通; 王浩然
Original assignee: Beijing Hospital
Current assignee: Beijing Hospital
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-25
Anticipated expiration: 2033-04-12

Abstract

The present utility model provides a urinary catheter comprising: the main pipe, first expansion layer and second expansion layer, first expansion layer sets up on the surface of one side of main pipe and in the length direction of main pipe extends there is first length, the second expansion layer sets up on the surface of main pipe to including first part and the second part of each other intercommunication, the tip intercommunication of first expansion layer has first injection pipeline, the second expansion layer the second part the second injection pipeline has in the terminal intercommunication in the direction of opposite side. The utility model greatly improves the fitting degree of the joint part of the catheter and the urethra and the bladder, reduces the occurrence of urine leakage, greatly improves the treatment efficiency and the treatment effect, and relieves the pain of patients.

Description

Urinary catheter

Technical Field

The utility model relates to the technical field of catheters, in particular to a catheter.

Background

With the development of technology, more and more devices have emerged to assist doctors in performing surgery, and these new devices and new techniques not only provide new means for alleviating patient pain, but also provide more treatment means for doctors. The occurrence of the catheter provides a brand-new diagnosis and treatment means for urology surgery, so that doctors can more accurately check the illness state of patients and carry out accurate treatment. In actual use, the catheter also requires the use of an expansion mechanism to secure the front end of the catheter within the bladder after insertion into the urethra, but such securement is not able to ensure a snug fit of the catheter to the urethra, as it is only possible to expand the front end of the catheter to have its outer diameter larger than the urethra diameter, which is particularly evident for elderly patients or patients with sphincter relaxations, resulting in leakage. Thus, there is a need for a catheter solution that enables a more intimate fit of the catheter with the urethra.

Disclosure of Invention

The utility model provides a catheter, which aims to overcome the defect that urine leakage is caused by the fact that the catheter is not tightly attached to the urethra in the prior art.

To achieve the above object, an embodiment of the present utility model provides a urinary catheter including: a main pipe having a tapered tip at one side in a length direction and a discharge port at the other side opposite to the one side in the length direction, a first expansion layer provided on an outer surface of the one side of the main pipe and extending with a first length in the length direction of the main pipe, and a second expansion layer provided on an outer surface of the main pipe and including a first portion and a second portion communicating with each other, wherein the first portion extends on the outer surface of the first expansion layer from an end portion of the other side of the first expansion layer toward the one side by a second length, the first length is larger than the second length, and the second portion extends on the outer surface of the main pipe from the end portion of the first expansion layer toward the other side by a third length, the end portion of the first expansion layer communicates with a first injection pipe, the end of the second portion of the second expansion layer in the direction of the other side communicates with a second injection pipe,

wherein the first expansion layer has a first expansion coefficient and the second expansion layer has a second expansion coefficient, the first expansion coefficient being greater than the second expansion coefficient.

According to the catheter provided by the embodiment of the utility model, the first expansion layer and the second expansion layer are arranged on the outer wall surface of the main pipe, the first expansion layer extends towards the tip at one side close to the tip and is communicated with the first injection pipe, the second expansion layer is provided with the first part extending outside the first expansion layer and the second part extending from the end part of the first expansion layer to the other side of the main pipe and is communicated with the second injection pipe, so that after the catheter is inserted into the urethra and reaches a preset position, air or liquid is injected into the first expansion layer through the first injection pipe to expand the first expansion layer to block the sliding-out of the catheter, and the two parts of the second expansion layer are respectively expanded with different expansion degrees through the second injection pipe, so that gradient expansion is formed on one part of the first expansion layer, and smaller expansion is formed outside the end part of the first expansion layer, and further a fitting part with gradually reduced expansion degree is formed on the first expansion layer on the basis of blocking through the first expansion layer, so that the fitting effect of the catheter and the bladder fitting with the urethra is greatly improved, the treatment effect of the patient is greatly improved, and the pain of the patient is greatly relieved.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 schematically shows a schematic structure of a catheter according to an embodiment of the utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

With the development of technology, more and more devices have emerged to assist doctors in performing surgery, and these new devices and new techniques not only provide new means for alleviating patient pain, but also provide more treatment means for doctors. The occurrence of the catheter provides a brand-new diagnosis and treatment means for urology surgery, so that doctors can more accurately check the illness state of patients and carry out accurate treatment. Urinary catheters are the most clinically used devices in urology, which are either poorly designed or improperly used to easily cause the associated infection, and are the most common type of infection in hospital infections. Risk factors for catheter-related urinary tract infections include patient aspects and catheter placement and maintenance aspects. The related urinary tract infection mode of the catheter is mainly retrograde infection, and especially the condition that urine leaks outwards to cause perineum infection occurs. Various catheter care guidelines indicate that medical institutions and staff should place additional emphasis on the prevention and control of catheter-related urinary tract infections.

The urinary catheter can be inserted into the bladder via the urethra in order to drain urine out. The catheter commonly used in hospitals is generally a three-cavity hemostatic catheter and comprises a main tube body, a fixed water bag water injection end connected to the rear end of the main tube body, a bladder flushing end and a urination end, wherein the front end of the main tube body is provided with a medicine adding port communicated with the bladder flushing end and a urination port communicated with the urination end, and the outer side of the front section of the main tube body is also provided with a spherical bladder fixed water bag communicated with the fixed water bag water injection end. In practical use, after the catheter is inserted into the urethra, the front end of the catheter needs to be fixed in the bladder by using an expansion mechanism, for example, the main tube body of the catheter can be inserted into the bladder through the urethra of a patient, and a spherical water bag near the front end of the catheter is used for fixing the catheter in the bladder after the catheter is inserted into the bladder, so that the catheter is not easy to fall out.

However, such fixation is only possible by expanding the front end of the catheter to have an outer diameter larger than the diameter of the urethra to prevent it from slipping out, but it is not possible to ensure a close fit of the catheter to the urethra, which is particularly evident for elderly patients or patients with sphincter relaxations, since the urethral muscles of these special people have relaxed, an effective tightening of the urethral canal is not possible, and there is a gap between the urethra and the urethral canal, which leads to the occurrence of leakage.

Thus, as shown in fig. 1, fig. 1 is a schematic view showing the structure of a urethral canal according to an embodiment of the utility model. A urethral canal according to an embodiment of the utility model may include: a main pipe 1, a first expansion layer 2 and a second expansion layer 3.

The main pipe 1 may have a tapered tip 12 on one side in the length direction. The tapered tip 12 may be used to guide movement of the catheter during insertion of the catheter into the urethra of a patient, and may have an opening on the front or side surface of the tip 12 for drawing urine from it or for delivering external cleaning liquid into the urethra for irrigation. The main conduit 1 may have a discharge opening 13 on the opposite side to the tip 12. The discharge port 13 may be used to discharge urine drawn through the tip 12 to the outside, and a container containing the urine thus drawn or a pumping pipe for pumping a washing liquid may be connected to the discharge port 13.

The first intumescent layer 2 may be provided on an outer surface of the main conduit 1, for example on the side close to the conical tip 12. For example, the first expansion layer 2 may be formed around the outer surface of the entire main pipe 1, and in the embodiment of the present utility model, the first expansion layer 2 may also be formed around a part of the outer surface of the entire main pipe 1. The first expansion layer 2 may extend a first length in the length direction of the main conduit 1, such that the first length may be such that the first expansion layer 2 has a certain size after expansion to be able to clamp the urethral canal inside the bladder without falling out. However, as described above, in the case where the sphincter is damaged or the elasticity is weak, the first swelling layer 2 cannot ensure close fitting with the portion of the urethra at the bladder wall. For this purpose the catheter according to an embodiment of the utility model is further provided with a second swelling layer 3 on the outer surface of the main conduit 1. For example, in an embodiment of the utility model, the second intumescent layer 3 may cover a portion of the first intumescent layer 2 and a portion of the outer surface of the main conduit 1. For example, the second expansion layer 3 may comprise a first portion 31 and a second portion 32 communicating with each other to cover a portion of the first expansion layer 2 and a portion of the main pipe 1, respectively.

For example, the first portion 31 may extend a second length on the outer surface of the first expansion layer 2 from the other side end of the first expansion layer 2, i.e., the end located at the discharge port 13 side, toward one side of the tapered tip 12. In an embodiment of the utility model, the first length may be greater than the second length, i.e. the second intumescent layer 3 may cover a portion of the first intumescent layer 2 only on the side facing the conical tip 12. The second portion 32 may extend a third length from the end of the first expansion layer 2 on the discharge port side toward the discharge port side on the outer surface of the main pipe 1. That is, the second expansion layer 3 may cover a part of the outer wall surface of the main pipe 1 by the second portion 32.

In addition, the end of the first expansion layer 2, i.e., the end toward the discharge port side, may be communicated with a first injection pipe 21. The end of the second portion 32 of the second expansion layer 3 in the direction of the other side, i.e. the end towards the discharge opening side, may be connected with a second injection conduit 33.

In particular, in an embodiment of the present utility model, the first expansion layer 2 may have a first expansion coefficient, and the second expansion layer 3 may have a second expansion coefficient. The first coefficient of expansion may be greater than the second coefficient of expansion. Thus, while the first expansion layer 2 is expanded by the first injection conduit 21, the second injection conduit 21 can be used to expand the second expansion layer 3 accordingly, but to a lesser extent than the first expansion layer 2, so that while the first expansion layer 2 is of a size sufficient to clamp the urethral canal within the bladder, the portion of the first expansion layer 2 to the urethra at the bladder wall and a portion of the urethra extending outwardly can be further filled by the second expansion layer 3 of lesser extent so that liquid within the bladder does not leak through the gap between the catheter and the urethra.

Furthermore, the first portion 31 of the second expansion layer 3 may have a gradient expansion coefficient gradually decreasing from the side closer to the first expansion layer 2, i.e., the side closer to the tapered tip 12, toward the other side in the length direction away from the first expansion layer 2, i.e., the side toward the discharge port. In other words, since the first portion 31 of the second expansion layer 3 covers the distal portion of the first expansion layer 2, such that when the catheter according to an embodiment of the utility model is inserted into the bladder, the portion of the first portion 31 closer to the side of the conical tip 12 is more likely to be in the bladder, and the portion of the first portion 31 closer to the side of the discharge opening is more likely to be in the urethra, the expansion coefficient of the first portion 31 should be gradually smaller from the side closer to the conical tip 12 to the side of the discharge opening, which allows the degree of expansion, in particular the shape and size of the expanded second expansion layer 3, to be adapted from the inside of the bladder to the combined portion of the bladder and the urethra and finally to the inside of the urethra.

Further, the expansion coefficient of the second portion 32 may be equal to or smaller than the value of the gradient expansion coefficient of the first portion 31 at the end of the side away from the first expansion layer 2, i.e., the side toward the discharge port. That is, since the second part 32 is most or completely in the urethra after the catheter according to the embodiments of the utility model is inserted into the bladder, its expansion coefficient is at least equal to or smaller than the minimum expansion coefficient of the first part 31, such that the expansion degree of the second part 32 does not exceed the expansion degree of the first part 31 located in the bladder, avoiding excessive expansion in the urethra, causing discomfort to the patient.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A urinary catheter, comprising: a main pipe having a tapered tip at one side in a length direction and a discharge port at the other side opposite to the one side in the length direction, a first expansion layer provided on an outer surface of the one side of the main pipe and extending with a first length in the length direction of the main pipe, and a second expansion layer provided on an outer surface of the main pipe and including a first portion and a second portion communicating with each other, wherein the first portion extends on the outer surface of the first expansion layer from an end portion of the other side of the first expansion layer toward the one side by a second length, the first length is larger than the second length, and the second portion extends on the outer surface of the main pipe from the end portion of the first expansion layer toward the other side by a third length, the end portion of the first expansion layer communicates with a first injection pipe, the end of the second portion of the second expansion layer in the direction of the other side communicates with a second injection pipe,

2. The urinary catheter of claim 1, wherein the first portion of the second expansion layer has a gradient expansion coefficient that decreases progressively from one side closer to the first expansion layer toward the other side that is farther from the first expansion layer in the length direction.

3. The urinary catheter of claim 2, wherein the coefficient of expansion of the second portion is equal to or less than the value of the gradient coefficient of expansion of the first portion at the end of the side remote from the first expansion layer.