Anti-backflow mechanism of catheter

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to a backflow prevention mechanism of a catheter, which comprises a mounting tube, the top of the mounting tube is communicated with an infusion tube, the bottom of the mounting tube is communicated with a catheter, the upper end and the lower end of the mounting tube are respectively provided with a catheter for urine to enter and exit, and the two catheters are connected and communicated through a connecting tube. Two annular plates are fixed to the inner side wall of the mounting pipe and located above and below the liquid guide pipe at the upper end respectively, a fixing plate used for sealing one annular plate is arranged between the two annular plates, a connecting rod is fixed to the bottom of the fixing plate, and the lower end of the connecting rod penetrates through the annular plate below and is fixedly provided with a buoyancy plate. The section, located between the two liquid guide pipes, of the installation pipe is detachably sleeved with a detection assembly. According to the utility model, the two annular plates can effectively prevent the backflow of urine, and the non-contact liquid level sensor and the loudspeaker are used for reminding medical personnel that the urine backflow phenomenon occurs and the pipeline needs to be checked so as to eliminate the backflow reason.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and particularly relates to an anti-reflux mechanism for a urinary catheter. Background Art

[0002] A urinary catheter is a tubular medical device for assisting urination. It has a tubular structure and can be inserted into the bladder through the urethra. It is usually made of soft materials such as rubber, silicone, or polyvinyl chloride (PVC), and has characteristics such as flexibility, durability, and biocompatibility. The main functions of the urinary catheter are to drain urine and blood clots in the bladder, and can also be used for urine collection, bladder irrigation, bladder pressure measurement, etc.

[0003] Urinary catheter reflux, also known as urine reflux, refers to the return of urine from the bladder through the urinary catheter to the urinary system, which may cause urinary tract infections or other complications. Although proper care of the urinary catheter has been emphasized clinically, urine reflux still occurs, such as the position of the urine collection bag being higher than the bladder level, the urinary catheter being incorrectly clamped or closed, the balloon not being properly fixed at the bladder neck or the balloon leaking, etc. And some existing anti-reflux structures can effectively prevent reflux, but cannot prompt medical staff to timely eliminate the causes of urine reflux. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-reflux mechanism for a urinary catheter, which can effectively prevent urine reflux and timely remind medical staff.

[0005] The anti-reflux mechanism for the urinary catheter includes a vertically arranged installation pipe. The top of the installation pipe is communicated with an infusion pipe, and the bottom of the installation pipe is communicated with a catheter. The upper and lower ends of the installation pipe are both provided with liquid guide pipes for urine to enter and exit. The two liquid guide pipes are connected and communicated through a connecting pipe. Two annular plates are fixed on the inner side wall of the installation pipe. The two annular plates are respectively located above and below the upper liquid guide pipe. A fixing plate for closing one of the annular plates is arranged between the two annular plates. A connecting rod is fixed to the bottom of the fixing plate. The lower end of the connecting rod passes through the lower annular plate and is fixed with a buoyancy plate. A detection component for detecting urine is detachably sleeved on a section of the installation pipe between the two liquid guide pipes.

[0006] Further, connecting holes communicating inside and outside are opened on the left side walls of the upper and lower ends of the installation pipe, and one ends of the two liquid guide pipes are respectively fixed in one of the connecting holes.

[0007] Further, the diameter of the fixing plate is larger than the inner diameter of the annular plate.

[0008] Further, the distance from the fixing plate to the upper annular plate is less than the length of the connecting rod.

[0009] Furthermore, sealing gaskets are fixed to both the top and bottom of the fixing plate.

[0010] Furthermore, the buoyancy plate is made of foam.

[0011] Furthermore, both the mounting pipe and the liquid guide pipe are of transparent rigid structure and integrally formed.

[0012] Furthermore, the detection assembly includes a mounting box with a microprocessor. The mounting box is sleeved on the mounting pipe through a clamping plate. Inside the mounting box, a non-contact liquid level sensor for detecting whether there is urine in the mounting pipe and a speaker for emitting an alarm when urine is detected are installed.

[0013] Furthermore, slots are provided on both the front and rear sides of the left side wall of the mounting box. The clamping plate is of a "U" - shaped structure and its two ends are respectively inserted into one of the slots.

[0014] Furthermore, a battery for providing power is installed inside the mounting box.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the utility model, the annular plates located above and below the upper liquid guide pipe can, when urine flows normally, prevent urine from directly flowing from the mounting pipe to the catheter, and when urine backflows, since the position of the buoyancy plate is lower than the upper liquid guide pipe, urine will first contact the buoyancy plate. With the backflow of urine, the buoyancy plate, connecting rod, and fixing plate with an overall "I" - shaped structure will move upward under the action of buoyancy until the fixing plate contacts and seals the upper annular plate. At this time, urine cannot flow from the upper annular plate to the infusion pipe, thus effectively preventing urine backflow. The utility model also detects whether there is urine in the mounting pipe through a non - contact liquid level sensor and emits an alarm through the speaker when the non - contact liquid level sensor detects urine in the mounting pipe, so as to prompt medical staff that urine backflow has occurred and the pipeline needs to be checked to eliminate the cause of backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model;

[0018] Figure 2 is Figure 1 the enlarged view of part A in

[0019] Figure 3 is a schematic diagram of the cooperation between the clamping plate and the mounting box;

[0020] Names of each component in the figure: 1. Infusion tube; 2. Installation tube; 3. Connecting tube; 4. Clamping plate; 5. Liquid guide tube; 6. Conduit; 7. Buoyancy plate; 8. Installation box; 9. Connecting rod; 10. Annular plate; 11. Fixed plate; 12. Sealing gasket; 13. Speaker; 14. Non-contact liquid level sensor; 15. Battery. Detailed implementation mode

[0021] The present utility model will be further described below with reference to the accompanying drawings through specific embodiments, but it is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present invention.

[0022] Embodiment 1

[0023] A urine catheter anti-backflow mechanism described in this embodiment includes a vertically arranged installation tube 2. The top of the installation tube 2 is communicated with an infusion tube 1, and the bottom of the installation tube 2 is communicated with a conduit 6. As Figure 1 shown, the infusion tube 1 communicates with the urine catheter, the conduit 6 communicates with the urine storage bag, and a valve is also provided on the conduit 6; in practical applications, it is necessary to ensure that the installation tube 2 is always in a vertical state, such as using tape, transparent tape, etc. to paste the installation tube 2 on the hospital bed frame in a vertical state;

[0024] Liquid guide tubes 5 for urine inlet and outlet are provided at both the upper and lower ends of the installation tube 2. As Figure 1 shown, connection holes communicating inside and outside are opened on the left side walls of the upper and lower ends of the installation tube 2. One end of each of the two liquid guide tubes 5 is fixed in one of the connection holes. In practical applications, the installation tube 2 and the liquid guide tubes 5 are both made of transparent hard structures and integrally formed;

[0025] The two liquid guide tubes 5 are connected and communicated through a connecting tube 3. As Figure 1 shown, one end of the connecting tube 3 is fixed inside the upper liquid guide tube 5, and the other end is fixed inside the lower liquid guide tube 5;

[0026] On the inner side wall of the installation pipe 2, two annular plates 10 are fixed. The two annular plates 10 are respectively above and below the liquid guide pipe 5 at the upper end. Between the two annular plates 10, there is a fixed plate 11 for closing one of the annular plates 10. At the bottom of the fixed plate 11, a connecting rod 9 is fixed. The lower end of the connecting rod 9 passes through the lower annular plate 10 and is fixed with a buoyancy plate 7. In this embodiment, the annular plates 10 respectively above and below the upper liquid guide pipe 5 (i.e., the upper liquid guide pipe 5) can, when urine flows normally, close the lower annular plate 10 under the action of gravity, avoiding urine flowing directly from the installation pipe 2 to the catheter 6. Also, when urine backflows, since the position of the buoyancy plate 7 is lower than the upper liquid guide pipe 5, urine will first contact the buoyancy plate 7. And as the urine backflows, the buoyancy plate 7, the connecting rod 9, and the fixed plate 11, which are in an overall "I"-shaped structure, will move upward under the action of buoyancy until the fixed plate 11 contacts and seals the upper annular plate 10. At this time, urine cannot flow from the upper annular plate 10 to the infusion pipe 1, thus effectively preventing urine backflow;

[0027] As Figure 1 and Figure 2 shown, the diameter of the fixed plate 11 is larger than the inner diameter of the annular plate 10, so as to ensure that the fixed plate 11 can completely seal the annular plate 10. The distance from the fixed plate 11 to the upper annular plate 10 is less than the length of the connecting rod 9, so as to ensure that urine will not flow into the upper liquid guide pipe 5 before the fixed plate 11 contacts the upper annular plate 10; among them, the buoyancy plate 7 is made of foam, so as to provide greater buoyancy, thereby ensuring that the buoyancy plate 7, the connecting rod 9, and the fixed plate 11 as a whole can move upward when urine backflows. The fixed plate 11 and the connecting rod 9 are both made of plastic;

[0028] Refer to Figure 1 and Figure 3 , on a section of the installation pipe 2 located between the two liquid guide pipes 5, there is an installation box 8 with a microprocessor. The installation box 8 is sleeved on the installation pipe 2 through a clamping plate 4. Inside the installation box 8, a non-contact liquid level sensor 14 for detecting whether there is urine in the installation pipe 2 and a speaker 13 for emitting an alarm when urine is detected are installed (in this paragraph, the installation box 8 with a microprocessor, the clamping plate 4, the non-contact liquid level sensor 14, and the speaker 13 as a whole constitute the detection component for detecting urine, and the speaker 13 can also be a buzzer). In this embodiment, the non-contact liquid level sensor 14 is used to detect whether there is urine in the installation pipe 2, and the speaker 13 emits an alarm when the non-contact liquid level sensor 14 detects that there is urine in the installation pipe 2, thereby prompting medical staff that urine backflow has occurred and the pipeline needs to be checked to eliminate the cause of backflow;

[0029] As Figure 1 and Figure 3As shown in the figure, slots are provided on both the front and rear sides of the left side wall of the installation box 8. The clamping plate 4 has a "U" - shaped structure and its two ends are respectively inserted into one of the slots. A channel for the probe of the non - contact liquid level sensor 14 to penetrate is provided on the left side wall of the installation box 8. The speaker 13 and the non - contact liquid level sensor 14 are both electrically connected to the micro - processor through wires. And a battery 15 for providing power, such as a button battery, is also installed in the installation box 8. Among them, the non - contact liquid level sensor 14 is a capacitive non - contact liquid level sensor, such as the SEN0368 capacitive non - contact liquid level sensor. It is a prior art. The principle is to use the inductive capacitance of water to detect the presence of liquid. It is very suitable for non - metal pipelines or flat containers. When there is no liquid approaching the sensor, due to the existence of distributed capacitance, the sensor has a certain static capacitance to the ground. When the liquid level rises and approaches the sensor, the parasitic capacitance of the liquid will be coupled to this static capacitance, resulting in an increase in the capacitance value of the sensor. This changing capacitance signal is input to the control IC for signal conversion, converted into a change in the electrical signal, and then the degree of this change is detected and judged through an algorithm. When the change exceeds the set threshold, the sensor will consider that the liquid level has reached the sensing point.

[0030] When this embodiment is in use, first, when the urine is flowing normally, the fixing plate 11 will close the lower annular plate 10 under the action of gravity. At this time, the urine will flow from the infusion tube 1 into the installation tube 2, then flow from the upper liquid - guiding tube 5 into the connecting tube 3, and then flow back from the lower liquid - guiding tube 5 into the installation tube 2 and flow to the catheter 6. The non - contact liquid level sensor 14 only detects a section of the installation tube 2 between the two liquid - guiding tubes 5, but the urine does not pass through this section during normal flow. Therefore, the speaker 13 will not give an alarm. When the urine shows a reflux phenomenon, the urine flows upward into the installation tube 2 and the connecting tube 3. However, since the position of the buoyancy plate 7 is lower than the upper liquid - guiding tube 5, the urine will first contact the buoyancy plate 7. And with the reflux of the urine, the buoyancy plate 7, the connecting rod 9, and the fixing plate 11, which are in an overall "I" - shaped structure, will move upward under the action of buoyancy until the fixing plate 11 contacts and seals the upper annular plate 10. At this time, the urine cannot flow from the upper annular plate 10 to the infusion tube 1, and the reflux of the urine is blocked. At the same time, due to the reflux of the urine, urine appears in the section of the installation tube 2 between the two liquid - guiding tubes 5, and as the liquid level rises, it is detected by the non - contact liquid level sensor 14, and at the same time, the speaker 13 gives an alarm to prompt medical staff and the patient's family members.

[0031] Embodiment 2

[0032] This embodiment further illustrates the technology. Sealing gaskets 12 are fixed to both the top and bottom of the fixing plate 11, such as Figure 1 and Figure 2As shown, the gasket 12 can effectively improve the sealing performance when the fixing plate 11 contacts the two annular plates 10 respectively, thereby further enhancing the anti-backflow effect. The gasket 12 is made of rubber or silica gel.

Claims

1. A urine catheter anti-backflow mechanism, comprising a vertically arranged mounting tube (2), the top of the mounting tube (2) is communicated with an infusion tube (1), and the bottom of the mounting tube (2) is communicated with a catheter (6), characterized in that: The upper and lower ends of the installation pipe (2) are both provided with liquid guide pipes (5) for urine to enter and exit. The two liquid guide pipes (5) are connected and communicated through a connecting pipe (3). Two annular plates (10) are fixed on the inner side wall of the installation pipe (2). The two annular plates (10) are respectively located above and below the liquid guide pipe (5) at the upper end. A fixing plate (11) for closing one of the annular plates (10) is arranged between the two annular plates (10). A connecting rod (9) is fixed at the bottom of the fixing plate (11). The lower end of the connecting rod (9) passes through the annular plate (10) below and is fixed with a buoyancy plate (7). A detection component for detecting urine is detachably sleeved on a section of the installation pipe (2) between the two liquid guide pipes (5).

2. The anti-reflux mechanism of the urinary catheter according to claim 1, wherein: Connecting holes communicating inside and outside are formed in the left side walls at the upper and lower ends of the installation pipe (2). One ends of the two liquid guide pipes (5) are respectively fixed in one of the connecting holes.

3. The anti-reflux mechanism of the urinary catheter according to claim 1, characterized in that: The diameter of the fixing plate (11) is larger than the inner diameter of the annular plate (10).

4. The anti-reflux mechanism for a urinary catheter according to claim 3, characterized in that: The distance from the fixing plate (11) to the upper annular plate (10) is less than the length of the connecting rod (9).

5. The anti-reflux mechanism of the urinary catheter according to claim 3, characterized in that: Sealing gaskets (12) are fixed on both the top and bottom of the fixing plate (11).

6. The anti-reflux mechanism of the urinary catheter according to claim 3, characterized in that: The buoyancy plate (7) is made of foam.

7. The anti-reflux mechanism of the urinary catheter according to claim 1, wherein: The installation pipe (2) and the liquid guide pipe (5) are both of transparent rigid structures and are integrally formed.

8. The anti-reflux mechanism for a urinary catheter according to claim 7, wherein: The detection component includes an installation box (8) with a microprocessor. The installation box (8) is sleeved on the installation pipe (2) through a clamping plate (4). A non-contact liquid level sensor (14) for detecting whether there is urine in the installation pipe (2) and a speaker (13) for sounding an alarm when urine is detected are installed in the installation box (8).

9. The anti-reflux mechanism of the urinary catheter according to claim 8, wherein: Slots are formed on the front and rear sides of the left side wall of the installation box (8). The clamping plate (4) is of a "U" - shaped structure and its two ends are respectively inserted into one of the slots.

10. The anti-reflux mechanism for a urinary catheter according to claim 8, characterized in that: A battery (15) for providing power is installed in the installation box (8).

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