A telescopic crawling urinary catheter

Abstract

The present invention relates to a telescopic crawling urinary catheter, comprising an outer catheter and an inner guide wire, wherein the head of the outer catheter is provided with at least one urinary catheter port, characterized in that a telescopic section is provided at a position near the head of the outer catheter, a front balloon and a rear balloon are provided on the outer catheter at both ends of the telescopic section, the outer diameters of the front balloon and the rear balloon are the same as the outer diameter of the outer catheter when not pressurized, and two charging devices are provided at a position near the tail of the outer catheter, and the two charging devices are respectively connected to the front balloon and the rear balloon fluid. The urinary catheter of the present invention has a novel structural design, can solve the existing problems of difficulty or failure in catheterization caused by urethral stones, prostatic hyperplasia, urethral stenosis, etc., is easy to operate, ensures successful catheterization at one time, and can reduce the discomfort of patients during the intubation process.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to a telescopic crawling catheter. Background Technology

[0002] Urinary catheterization is a common procedure in urology. In clinical practice, urethral stones, benign prostatic hyperplasia, urethral stricture, and other reasons often make catheterization difficult or unsuccessful, causing great suffering to patients and exacerbating the tension between doctors and patients. Summary of the Invention

[0003] The present invention aims to provide a telescopic crawling catheter to solve the above-mentioned problems. To this end, the specific technical solution adopted by the present invention is as follows:

[0004] A telescopic crawling catheter includes an outer catheter and an inner guidewire. The head of the outer catheter is provided with at least one catheter port. The catheter is characterized in that a telescopic section is provided near the head of the outer catheter, and an anterior balloon and a posterior balloon are provided on the outer catheter at both ends of the telescopic section. When not inflated, the outer diameters of the anterior balloon and the posterior balloon are the same as the outer diameter of the outer catheter. Two inflating devices are provided near the tail of the outer catheter, and the two inflating devices are in fluid communication with the anterior balloon and the posterior balloon, respectively.

[0005] Furthermore, two pressurization devices are symmetrically arranged on both sides of the outer conduit.

[0006] Furthermore, the inflation device includes an inflation balloon, a balloon interface, and a front switch. The inflation balloon has a connecting tube between itself and the external catheter, and its wall thickness is less than that of the anterior and posterior balloons. The front switch is located on the balloon interface.

[0007] Furthermore, the front switch is either a blocking or one-way valve.

[0008] Furthermore, the pressurization device also includes a rear switch, which is mounted on the connecting pipe.

[0009] Furthermore, the rear switch is a clip.

[0010] Furthermore, the length of the telescopic section is between 2 and 3 centimeters.

[0011] Furthermore, the distance between the anterior balloon and the tip of the external catheter is within 2 centimeters.

[0012] The present invention adopts the above technical solution and has the following beneficial effects: The urinary catheter structure of the present invention has a novel design, which can solve the problems of difficulty or failure of catheter insertion caused by urethral stones, benign prostatic hyperplasia, urethral stricture, etc. It is easy to operate, ensures successful catheter insertion on the first attempt, and can reduce the patient's discomfort during the catheter insertion process. Attached Figure Description

[0013] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0014] Figure 1 This is a schematic diagram of a telescopic crawling catheter according to the present invention. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 A cross-sectional view of the telescopic crawling catheter of the present invention is shown. The telescopic crawling catheter includes an external catheter 1, an internal guidewire 2, an anterior balloon 3, a posterior balloon 4, and two inflation devices (hereinafter referred to as the first inflation device 5 and the second inflation device 6). The external catheter 1 is typically made of medical-grade silicone rubber, and its tip has at least one catheter port 11. A telescopic section 12 is provided near the tip of the external catheter 1, the length of which is moderate, preferably between 2 and 3 centimeters. The anterior balloon 3 and the posterior balloon 4 are respectively mounted on the front and rear ends of the telescopic section 12, and their outer diameters are the same as the outer diameter of the external catheter 1. The first inflation device 5 and the second inflation device 6 are arranged near the tail end of the external catheter 1 and are in fluid communication with the anterior balloon 3 and the posterior balloon 4, respectively. That is, the first inflation device 5 and the second inflation device 6 are used to inflate and deflate the anterior balloon 3 and the posterior balloon 4. The internal guidewire 2 is inserted into the external catheter 1 and is mainly used to assist in inserting the external catheter 1 into the urethra. When insertion of the urinary catheter (external catheter 1) is obstructed, the first inflation device 5 is operated to inflate the anterior balloon 3, dilating the urethra, while the external catheter 1 is pushed, so that the telescopic section 12 is in an overlapping state; then the second inflation device 6 is operated to inflate the posterior balloon 4, tightly adhering to the urethra to form tension, and the first inflation device 5 is operated to contract the anterior balloon 3 into a catheter shape, pushing the inner guidewire 2, so that the telescopic section 12 is extended, the anterior balloon 3 moves forward a section, and the external catheter 1 passes through the obstructed section of the urethra. Then the anterior balloon 3 is inflated, the posterior balloon 4 is contracted, the external catheter 1 is pushed again, the posterior balloon 4 is inflated again, and the inner guidewire 2 is pushed again. This process is repeated, and the urinary catheter can be easily inserted into the urethra until it reaches the bladder.

[0017] In this embodiment, the first inflation device 5 and the second inflation device 6 are symmetrically arranged on both sides of the external catheter 1. The first inflation device 5 and the second inflation device 6 have the same structure. Specifically, the first inflation device 5 and the second inflation device 6 include a first inflation balloon 51 and a second inflation balloon 61, a first balloon interface 52 and a second balloon interface 62, and a first front switch 53 and a second front switch 63. Physiological saline can be inflated into the first inflation balloon 51 and the second inflation balloon 61 through the first balloon interface 52 and the second balloon interface 62. The first inflation balloon 51 and the second inflation balloon 61 are connected to the external catheter 1 by a connecting tube, which communicates with the anterior balloon 3 and the posterior balloon 4, respectively. The wall thickness of the connecting tube is less than that of the anterior balloon 3 and the posterior balloon 4, so that when the first inflation balloon 51 and the second inflation balloon 61 are inflated in a static state, the anterior balloon 3 and the posterior balloon 4 cannot inflate, and their outer diameter is the same as that of the anterior segment of the catheter. Only when the first inflation balloon 51 or the second inflation balloon 61 is squeezed does the anterior balloon 3 or the posterior balloon 4 become balloon-shaped. Specifically, the anterior balloon 3 communicates with the first inflation balloon 51. Physiological saline is inflated through the first balloon interface 52, filling the first inflation balloon 51. When the first inflation balloon 51 is squeezed, the anterior balloon 3 inflates; when the first inflation balloon 51 is released, the physiological saline returns from the anterior balloon 3 to the first inflation balloon 51, the anterior balloon 3 retracts into a tubular shape, and the first inflation balloon 51 is inflated again. Similarly, the posterior balloon 4 communicates with the second inflatable balloon 61. Saline solution is inflated through the second balloon port 62, filling the second inflatable balloon 61. When the second inflatable balloon 61 is squeezed, the anterior balloon 3 inflates; when the second inflatable balloon 61 is released, the saline solution returns from the posterior balloon 4 to the second inflatable balloon 61, causing the posterior balloon 4 to retract into a tubular shape, and the second inflatable balloon 61 is inflated again. The first front switch 53 and the second front switch 63 are respectively located on the first balloon port 52 and the second balloon port 62. In the illustrated embodiment, the first front switch 53 and the second front switch 63 are blocked. In this case, the first front switch 53 and the second front switch 63 are fixed to the first balloon port 52 and the second balloon port 62 by connecting ropes. It should be understood that the first front switch 53 and the second front switch 63 can also be one-way valves. The first front switch 53 and the second front switch 63 open when saline solution is initially injected and close after filling.

[0018] Furthermore, the first inflation device 5 and the second inflation device 6 may also include a first rear switch 54 and a second rear switch 64, which are disposed on corresponding connecting tubes between the first inflation balloon 51 and the second inflation balloon 61 and the external catheter 1. Preferably, the first rear switch 54 and the second rear switch 64 are clamps for easy operation. After successful catheterization, the anterior balloon 3 can be inflated, and the clamp 54 can be clamped on the connecting tube to keep the anterior balloon 3 inflated, thereby preventing the catheter from dislodging. Similarly, after successful catheterization, the posterior balloon 4 can be inflated, and the clamp 64 can be clamped on the connecting tube to keep the posterior balloon 4 inflated, which can prevent leakage (i.e., prevent urine from flowing out of the external catheter 1).

[0019] Preferably, the distance between the anterior balloon 3 and the head of the external catheter 1 is within 2 cm to facilitate smoother cannulation.

[0020] The following describes the catheter placement process of this invention: During operation, an appropriate amount of physiological saline is injected into the balloon interfaces 52 and 62 until the balloons 51 and 61 are fully inflated. The balloon interfaces 52 and 62 are then plugged with plugs 53 and 63. The catheter is inserted according to the normal catheter placement procedure. When the insertion of the catheter (external catheter 1) is obstructed, the first inflation balloon 51 is squeezed to inflate the anterior balloon 3, dilating the urethra, while simultaneously pushing the external catheter 1 so that the telescopic segment 12 is in a folded state. Then, the second inflation balloon 62 is squeezed to inflate the posterior balloon 4, tightly adhering to the urethra to create tension. Finally, the first inflation balloon 51 is released. In the first inflated balloon 51, the saline solution in the anterior balloon 3 returns to the first inflated balloon 51, causing the anterior balloon 3 to contract into a catheter shape. The inner guidewire 2 is then advanced, extending the telescopic segment 12. The anterior balloon 3 moves forward slightly, and the catheter passes through the obstructed urethra. Next, the first inflated balloon 51 is squeezed, inflating the anterior balloon 3. The second inflated balloon 62 is released, causing the posterior balloon 4 to contract into a catheter shape. The outer catheter 1 is then advanced, causing the telescopic segment 12 to overlap. The posterior balloon 4 is then inflated again, and the inner guidewire 1 is advanced. This process is repeated, similar to an earthworm crawling, allowing the catheter to be easily inserted into the urethra and eventually into the bladder. The entire insertion process is simple, ensures successful insertion on the first attempt, and reduces patient discomfort during the procedure.

[0021] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A telescopic crawling urinary catheter, comprising an outer catheter and an inner guide wire, wherein the head of the outer catheter is provided with at least one urinary catheter port, characterized in that: A telescopic section is provided at a position near the head of the outer catheter, and a front balloon and a rear balloon are provided on the outer catheter at both ends of the telescopic section. When not pressurized, the outer diameters of the front balloon and the rear balloon are the same as the outer diameter of the outer catheter. Two charging devices are provided at a position near the tail of the outer catheter, and the two charging devices are respectively connected to the fluid of the front balloon and the rear balloon; an inner guide wire is inserted into the outer catheter, and the front end of the inner guide wire is provided in the outer catheter, and the telescopic section can be extended by pushing the inner guide wire; the two charging devices include a first charging device and a second charging device; When insertion of the urinary catheter is obstructed, the first pressurizing device is operated to inflate the front balloon to dilate the urethra, and at the same time, the outer catheter is pushed to make the telescopic section overlapped; then the second pressurizing device is operated to inflate the rear balloon to fit tightly against the urethra to form tension, the first pressurizing device is operated to shrink the front balloon into a catheter shape, the inner guide wire is pushed to stretch the telescopic section, the front balloon moves forward a section, and the outer catheter passes through the obstructed section of the urethra; then the front balloon is expanded, the rear balloon is contracted, and the outer catheter is pushed again, and this process is repeated. The urinary catheter can be inserted into the urethra until it reaches the bladder.

2. The telescopic crawling urinary catheter according to claim 1, characterized in that: The two inflation devices are symmetrically arranged on both sides of the outer catheter.

3. The telescopic crawling urinary catheter according to claim 1, characterized in that: The charging device comprises a charging balloon, a balloon interface and a front switch. A connecting tube is provided between the charging balloon and the outer catheter and the wall thickness of the connecting tube is smaller than that of the front balloon and the rear balloon. The front switch is arranged on the balloon interface.

4. The telescopic crawling urinary catheter according to claim 3, characterized in that: The front switch is a blocking or one-way valve.

5. The telescopic crawling urinary catheter according to claim 3, characterized in that: The charging device also includes a rear switch, which is arranged on the connecting pipe.

6. The telescopic crawling urinary catheter according to claim 5, characterized in that: The rear switch is a clip.

7. The telescopic crawling urinary catheter according to claim 1, characterized in that: The length of the telescopic section is between 2 and 3 cm.

8. The telescopic crawling urinary catheter according to claim 1, characterized in that: The distance between the front balloon and the outer catheter head is within 2 cm.

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