Urethral catheter capable of preventing tissue from being damaged by violent detachment

Abstract

The utility model relates to the technical field of medical instruments, in particular to a urethral catheter capable of preventing tissue damage caused by violent catheter detachment. Comprising an end part, a urinary catheterization cavity and a fixing cavity, the end portion is arranged to be of a cavity structure at the far end of the catheter, and the catheterization cavity and the fixing cavity are communicated in the cavity structure of the end portion and are isolated from each other in the catheter structure except the end portion. When the balloon is extruded and the pressure is increased, liquid in the balloon pushes the movable area, so that the catheter is converted from the first configuration to the second configuration, the closed state between the near end of the outer cavity and the far end of the balloon section is opened, the liquid in the balloon can flow out through the outer cavity, pressure relief of the balloon is completed, and violent catheter separation is converted into non-violent catheter separation. The patient is furthest protected.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a urinary catheter that can prevent violent tube disengagement and tissue damage. Background Art

[0002] The catheter is used to be inserted into the bladder through the urethra to drain urine. After the catheter is inserted into the bladder, a balloon is placed near the distal end of the catheter to fix the catheter in the bladder. Liquid is injected into the fixed balloon through a liquid pipe at the proximal opening to fill the fixed balloon to fix the catheter. The drainage tube is connected to a urine bag to collect urine.

[0003] In clinical practice, for patients who need long-term indwelling urinary catheters, accidental catheter dislocation often leads to adverse medical safety events. Accidental catheter dislocation can be divided into non-violent catheter dislocation and violent catheter dislocation. Non-violent catheter dislocation refers to the natural slipping of the catheter caused by the decompression of the fixed balloon, and violent catheter dislocation refers to the accidental dislocation of the catheter caused by external force pulling the catheter. When non-violent catheter dislocation occurs, the damage to the patient is within a controllable range because the balloon has already been decompressed. However, when violent catheter dislocation is inevitable, the fixed balloon cannot actively release the pressure through the balloon valve, which can easily cause serious adverse consequences such as urethral injury or even urethral rupture in the patient.

[0004] The Chinese patent with publication number CN216877544U discloses a balloon for a urinary catheter and a urinary catheter having the balloon. The balloon for the urinary catheter can rupture along the weak structure after the pressure in the balloon body reaches a preset threshold, without generating fragments. However, there are certain defects in the method of converting violent tube removal into non-violent tube removal by guiding the rupture of the balloon, that is, the pressure of balloon rupture cannot be accurately set, the protective effect is lost if the balloon strength is too high, and the fixation effect is reduced if the balloon strength is too low. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A urinary catheter for preventing violent dislodgment and tissue damage comprises: an end, a urinary catheter cavity, and a fixed cavity; the end is arranged as a cavity structure at the distal end of the urinary catheter, the urinary catheter cavity and the fixed cavity are connected in the cavity structure of the end, and are isolated from each other in the urinary catheter structure except the end.

[0008] As a preferred technical solution, the urinary catheter cavity is configured as a hollow cavity extending from the end portion to the proximal end of the urinary catheter.

[0009] As a preferred technical solution, the fixed cavity includes a valve body segment and a balloon segment, the distal end of the valve body segment is connected to the end, the distal end of the balloon segment is connected to the valve body segment, and the valve body segment and the balloon segment are arranged around the catheterization cavity.

[0010] As a preferred technical solution, the valve body section includes an outer cavity and an inner cavity. When in a first configuration, the volume of the inner cavity is at its maximum value, the distal end of the outer cavity is connected to the end, and the proximal end of the outer cavity is closed to the distal end of the balloon section; when in a second configuration, the volume of the inner cavity is less than its maximum value, the distal end of the outer cavity is connected to the end, and the proximal end of the outer cavity is connected to the distal end of the balloon section.

[0011] As a preferred technical solution, the inner cavity is provided with a fixed area and a moving area, and the moving area has the freedom to move away from or close to the fixed area along its axial direction.

[0012] As a preferred technical solution, a push spring is arranged between the fixed zone and the movable zone. When in the first configuration, the movable zone moves away from the fixed zone under the push action of the push spring, closing the proximal end of the outer cavity and the distal end of the balloon segment; when in the second configuration, the movable zone is close to the fixed zone, connecting the proximal end of the outer cavity and the distal end of the balloon segment.

[0013] As a preferred technical solution, the balloon segment is provided with a fixed balloon. When in the first configuration, the fixed balloon is in a filled state. When in the second configuration, the liquid in the balloon segment is discharged from the outer cavity to the end, and the fixed balloon is in a depressurized state.

[0014] As a preferred technical solution, it also includes an injection cavity, which is arranged in parallel with the catheterization cavity, and the distal end of the injection cavity is connected to the proximal end of the balloon segment.

[0015] As a preferred technical solution, a sealing plug is provided at the proximal end of the injection cavity.

[0016] Preferably, a sealing ring is provided between the valve body section and the balloon section.

[0017] As a preferred technical solution, the end portion is configured as a conical structure, and a urinary catheter port is provided through a side wall of the end portion.

[0018] Beneficial effects:

[0019] The utility model provides a technical solution that can effectively prevent the damage to human tissue, especially the urethra, caused by violent tube removal. In the prior art, when external force pulling occurs, the fixed balloon in a filled state cannot release pressure in time, and the filled balloon still stuck in the bladder is pulled out violently, which can easily cause serious adverse consequences such as urethral damage or even urethral rupture in the patient. In the present solution, a valve body is arranged in the catheter. When the balloon is squeezed and the pressure increases, the liquid in the balloon will push the moving area, so that the catheter changes from the first configuration to the second configuration, and the closed state between the proximal end of the outer cavity and the distal end of the balloon section is opened, so that the liquid in the balloon can flow out through the outer cavity, and the pressure relief of the balloon is completed, so that the violent tube removal is transformed into non-violent tube removal, and the patient is protected to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 1-end, 2-catheterization cavity, 3-fixed cavity, 4-valve body section, 5-balloon section, 6-outer cavity, 7-inner cavity, 8-fixed area, 9-moving area, 10-pushing spring, 11-fixed balloon, 12-liquid injection cavity, 13-sealing plug, 14-catheterization port, 15-sealing ring.

[0021] Figure 1 2 is a schematic structural diagram of a first configuration of a urinary catheter provided in an embodiment for preventing violent dislodgment and tissue damage;

[0022] Figure 2 It is a structural schematic diagram of a second configuration of a urinary catheter provided in an embodiment for preventing violent dislodgment and tissue damage. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In addition, the following descriptions of the embodiments are made with reference to the attached drawings to illustrate specific embodiments in which the present invention can be implemented. Directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements.

[0026] In the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the medical device, the radial direction refers to the direction along the diameter or radius, and the radial direction and the axial direction are perpendicular to each other, and the circumferential direction refers to the circumferential direction around the central axis. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] A urinary catheter for preventing violent dislodgment and tissue damage comprises: an end, a urinary catheter cavity, and a fixed cavity; the end is arranged as a cavity structure at the distal end of the urinary catheter, the urinary catheter cavity and the fixed cavity are connected in the cavity structure of the end, and are isolated from each other in the urinary catheter structure except the end.

[0028] As a preferred embodiment, the urinary catheter cavity is configured as a hollow cavity extending from the end portion to the proximal end of the urinary catheter.

[0029] As a preferred embodiment, the fixed cavity includes a valve body segment and a balloon segment, the distal end of the valve body segment is connected to the end, the distal end of the balloon segment is connected to the valve body segment, and the valve body segment and the balloon segment are arranged around the catheterization cavity.

[0030] Preferably, the urinary catheter for preventing injury from violent tube removal provided in the present solution has a first configuration and a second configuration, such as Figure 1 The first configuration shown is the balloon-filled state. Figure 2 The second configuration shown is the balloon deflated state.

[0031] As a preferred embodiment, the valve body segment includes an outer cavity and an inner cavity. When in a first configuration, the volume of the inner cavity is at its maximum value, the distal end of the outer cavity is connected to the end, and the proximal end of the outer cavity is closed to the distal end of the balloon segment; when in a second configuration, the volume of the inner cavity is less than its maximum value, the distal end of the outer cavity is connected to the end, and the proximal end of the outer cavity is connected to the distal end of the balloon segment.

[0032] As a preferred embodiment, the inner cavity is provided with a fixed area and a moving area, and the moving area has the freedom to move away from or close to the fixed area along its axial direction.

[0033] As a preferred embodiment, a push spring is arranged between the fixed zone and the movable zone. When in the first configuration, the movable zone moves away from the fixed zone under the push action of the push spring, closing the proximal end of the outer cavity and the distal end of the balloon segment; when in the second configuration, the movable zone is close to the fixed zone, connecting the proximal end of the outer cavity and the distal end of the balloon segment.

[0034] As a preferred embodiment, the balloon segment is provided with a fixed balloon. When in the first configuration, the fixed balloon is in a filled state. When in the second configuration, the liquid in the balloon segment is discharged from the outer cavity to the end, and the fixed balloon is in a depressurized state.

[0035] As a preferred embodiment, it further comprises an injection cavity, which is arranged in parallel with the urinary catheter cavity, and the distal end of the injection cavity is connected to the proximal end of the balloon segment.

[0036] As a preferred embodiment, a sealing plug is provided at the proximal end of the injection cavity.

[0037] Preferably, a sealing ring is provided between the valve body section and the balloon section.

[0038] As a preferred embodiment, the end portion is configured as a conical structure, and a urinary catheter port is provided through a side wall of the end portion.

[0039] In this solution, a one-way valve is used to help the fixed balloon to release pressure in unexpected situations. This is different from the balloon explosion solution in the prior art. On the one hand, the risk of injury to the patient's body caused by balloon pressure release is significantly smaller. On the other hand, the one-way valve is activated by the pressure on the balloon. Once the balloon is subjected to a pressure exceeding the limit, it proves that squeezing has occurred between the fixed balloon and the patient's bladder, and pressure relief must be started. Otherwise, if squeezing has not occurred, pressure relief will not occur. Therefore, pressure control is very accurate, and there will be no problems of poor protection or poor fixation effect.

[0040] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A urinary catheter that can prevent violent dislocation and tissue damage, characterized in that: include: An end portion (1), a urinary catheter cavity (2), and a fixed cavity (3); the end portion (1) is arranged as a cavity structure at the distal end of a urinary catheter, the urinary catheter cavity (2) and the fixed cavity (3) are connected in the cavity structure of the end portion (1), and are isolated from each other in the urinary catheter structure other than the end portion (1); the fixed cavity (3) comprises a valve body section (4) and a balloon section (5); the distal end of the valve body section (4) is connected to the end portion (1), and the distal end of the balloon section (5) is connected to the valve body section (4); the valve body section (4) and the balloon section (5) are arranged around the urinary catheter cavity (2).

2. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 1, characterized in that: The urinary catheter cavity (2) is configured as a hollow cavity that runs through the end portion (1) to the proximal end of the urinary catheter.

3. A urinary catheter for preventing violent dislocation and tissue damage according to claim 2, characterized in that: The valve body section (4) comprises an outer cavity (6) and an inner cavity (7). When in a first configuration, the volume of the inner cavity (7) is at its maximum value, the distal end of the outer cavity (6) is connected to the end (1), and the proximal end of the outer cavity (6) is closed to the distal end of the balloon section (5); when in a second configuration, the volume of the inner cavity (7) is less than its maximum value, the distal end of the outer cavity (6) is connected to the end (1), and the proximal end of the outer cavity (6) is connected to the distal end of the balloon section (5).

4. A urinary catheter for preventing violent dislocation and tissue damage according to claim 3, characterized in that: The inner cavity (7) is provided with a fixed area (8) and a moving area (9), and the moving area (9) has the freedom to move away from or close to the fixed area (8) along its axial direction.

5. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 4, characterized in that: A push spring (10) is provided between the fixed area (8) and the moving area (9). When in the first configuration, the moving area (9) moves away from the fixed area (8) under the push action of the push spring (10), closing the proximal end of the outer cavity (6) and the distal end of the balloon segment (5); when in the second configuration, the moving area (9) approaches the fixed area (8), connecting the proximal end of the outer cavity (6) and the distal end of the balloon segment (5).

6. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 5, characterized in that: The balloon segment (5) is provided with a fixed balloon (11). When in a first configuration, the fixed balloon (11) is in a filled state. When in a second configuration, the liquid in the balloon segment (5) is discharged from the outer cavity (6) to the end (1), and the fixed balloon (11) is in a depressurized state.

7. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 3, characterized in that: It also comprises an injection cavity (12), the injection cavity (12) and the urinary catheter cavity (2) are arranged in parallel, and the distal end of the injection cavity (12) is connected to the proximal end of the balloon segment (5).

8. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 7, characterized in that: A sealing plug (13) is provided at the proximal end of the injection cavity (12); and a sealing ring (15) is provided between the valve body section (4) and the balloon section (5).

9. A urinary catheter for preventing violent dislodgment and tissue damage according to claim 2, characterized in that: The end portion (1) is configured as a conical structure, and a urinary catheter port (14) is provided through the side wall of the end portion (1).

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