Instrument for measuring inner diameter of urinary tract of human body

Abstract

The utility model relates to the technical field of surgical instruments, in particular to a human body urinary tract inner diameter measuring instrument which comprises a measuring catheter and a rotating sleeve, the measuring catheter is of a hollow tube body structure, and one end of the measuring catheter is provided with a positioning bag cavity used for being fixed in a bladder. An air hole is formed in the position, located in the positioning bag cavity, of the measuring catheter, and the air hole is communicated with the positioning bag cavity and the measuring catheter; the rotating sleeve is arranged on the outer side surface of the measuring catheter in a sleeving mode, and a displacement sensor is arranged at the end, close to the positioning bag cavity, of the rotating sleeve. And a rotating sleeve is arranged at the other end of the rotating casing pipe, and the rotating sleeve is rotationally connected with the rotating casing pipe. The novel resectoscope effectively solves the problems that the existing resectoscope cannot adapt to differences of different races, so that the existing resectoscope cannot be used due to urethrostenosis in domestic operations or the urethra is easily damaged when the existing resectoscope is used, and the like.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to a measuring instrument for measuring the inner diameter of the human urinary tract. Background Technology

[0002] In laparoscopic prostate surgery, commonly used electroresection instruments, such as the WOLF brand manufactured in Europe and America, are generally of the 26F size, primarily designed for the physical characteristics of Europeans and Americans. However, when performing such surgeries in China, due to physiological differences between ethnic groups, Chinese patients often have relatively narrow urethras, frequently resulting in situations where the 26F electroresection scope cannot be used due to urethral stricture. Forcing its use could easily damage the urethra. Although some have tried using the 24F size, it still cannot adequately accommodate the differences between ethnic groups, leading to a mismatch between the electroresection scope size and the patient's actual urinary tract during surgery. This affects surgical outcomes and postoperative recovery, while also increasing patient discomfort and the risk of complications. Therefore, it is generally necessary to measure the patient's urinary tract diameter before surgery.

[0003] In current technologies, before performing laparoscopic prostate surgery, scanning imaging is generally performed using methods such as ultrasound, CT, or MRI. The diameter and length of the urethra in the prostate are then measured based on the transverse or longitudinal sections to ensure the selection of the appropriate electrocautery endoscope model. However, this method is not only prone to measurement errors, but also takes a long time. Furthermore, some rural hospitals lack the relevant testing equipment, making it impossible to accurately measure the length of the prostate urethra, thus increasing the surgical risk.

[0004] Therefore, there is an urgent need for a convenient, low-cost, and highly accurate instrument for measuring the internal diameter of the human urinary tract. Utility Model Content

[0005] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide a measuring instrument for the internal diameter of the human urinary tract, which aims to solve the problems mentioned in the background art, effectively reduce the pain of urethral dilation for patients, reduce the incidence of surgical complications, and facilitate the rapid recovery of patients after surgery.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A measuring device for the internal diameter of the human urinary tract includes a measuring catheter and a rotating sleeve. The measuring catheter has a hollow tube structure, with a positioning cavity at one end for fixing it in the bladder and an inflation piston at the other end for inflating the positioning cavity. An air hole is provided at the location of the positioning cavity, and the air hole is connected to both the positioning cavity and the measuring catheter. The rotating sleeve is sleeved on the outer surface of the measuring catheter, and a displacement sensor is provided at the end of the rotating sleeve near the positioning cavity. A rotating sleeve is provided at the other end of the rotating sleeve, and the rotating sleeve is rotatably connected to the rotating sleeve.

[0008] Preferably, the rotating sleeve is provided with a locking knob at one end near the rotating tube to limit the movement and fix the position of the rotating tube, and the locking knob abuts against the rotating tube; the rotating sleeve is provided with a digital display at the other end away from the rotating tube, and the digital display is electrically connected to a miniature endoscope camera to display the measured values ​​in real time.

[0009] Preferably, the measuring catheter includes a straight section and a bent section, the straight section and the bent section are integrally formed, and a scale line is provided between the outer surface of the straight section and the posterior outer side of the positioning cyst; the bent section is bent outwards to one side of the straight section, and the head of the bent section is blunt and rounded.

[0010] Preferably, the diameter of the straight section is smaller than the diameter of the elbow section, and the outer surface of the end of the straight section is provided with an external thread structure.

[0011] Preferably, the rotating sleeve has an internal thread structure, and the rotating sleeve is threadedly connected to the straight section through the internal thread structure.

[0012] Preferably, the rotating sleeve is a transparent tube, and one end of the rotating sleeve abuts against the rear end of the positioning bladder. The outer surface of the rotating sleeve is engraved with the same scale lines as the straight section.

[0013] Preferably, the positioning bladder is located at the end of the bend section, and the positioning bladder is normally attached to the outer surface of the measuring catheter, and expands in a ring shape after being inflated by the inflation piston.

[0014] Preferably, the inflation piston is provided with an inflation valve, which is a one-way valve.

[0015] In summary, the beneficial effects of this utility model are as follows:

[0016] This utility model's instrument for measuring the internal diameter of the human urinary cavity can accurately measure key data such as the length of the human urinary cavity, the diameter of the prostatic urethra, and the transverse diameter. It effectively solves the problems of existing electrocautery endoscopes being unsuitable for different ethnic groups, leading to urethral strictures that cannot be used or are prone to urethral damage during surgery in China. This reduces the pain of urethral dilation for patients, lowers the incidence of surgical complications, and facilitates rapid postoperative recovery. It also has good clinical application prospects and social benefits, thereby improving the efficiency of medical resource utilization and the effectiveness of surgical treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the human urinary tract internal diameter measuring instrument of this utility model;

[0018] Figure 2 This is an exploded view of the human urinary tract internal diameter measuring instrument of this utility model;

[0019] Figure 3 This is a top view of the measuring instrument for measuring the inner diameter of the human urinary tract according to this utility model;

[0020] Figure 4 yes Figure 3 A cross-sectional view of plane AA.

[0021] Explanation of the reference numerals in the figure:

[0022] 1. Measuring tubing; 11. Straight section; 12. Elbow section; 13. Air vent; 2. Rotating sleeve; 3. Positioning chamber; 4. Inflation piston; 5. Displacement sensor; 6. Rotating sleeve; 7. Locking knob; 8. Digital display; 9. Scale lines; 10. Inflation valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0025] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0026] The following is in conjunction with the appendix Figure 1-4 The present invention provides a more detailed description of an embodiment of a measuring instrument for measuring the internal diameter of the human urinary tract.

[0027] Example 1

[0028] A measuring device for measuring the internal diameter of the human urinary tract includes a measuring catheter 1 and a rotating sleeve 2. The measuring catheter 1 has a hollow tube structure, and one end of the measuring catheter 1 is provided with a positioning cavity 3 for fixing in the bladder, and the other end is provided with an inflation piston 4 for inflating the positioning cavity 3. An air hole 13 is opened at the position of the measuring catheter 1 in the positioning cavity 3, and the air hole 13 is connected to the positioning cavity 3 and the measuring catheter 1 respectively. The rotating sleeve 2 is sleeved on the outer surface of the measuring catheter 1, and a displacement sensor 5 is provided at the end of the rotating sleeve 2 near the positioning cavity 3. A rotating sleeve 6 is provided at the other end of the rotating sleeve 2, and the rotating sleeve 6 is rotatably connected to the rotating sleeve 2.

[0029] Specifically, the inflation piston 4 is equipped with an inflation valve 10, which is a one-way valve. Using a syringe, approximately 10 ml of water or air is injected into the positioning cavity 3 through the one-way inflation piston 4. The measuring catheter 1 is then gently pulled outwards until obstruction occurs, fixing the positioning cavity 3 at the urethral orifice. The rotating sleeve 6 drives the rotating cannula 2 to move spirally, while the miniature endoscope camera 5 observes the retraction distance of the rotating cannula 2 until the tip of the rotating cannula 2 retracts to the supramembranous urethra at the apex of the prostate. At this point, the retraction distance of the rotating cannula 2 is the urine volume measurement. The diameter of the prostate gland is measured, and a locking knob 7 is provided at one end of the rotating sleeve 6 near the rotating cannula 2 to limit the movement and fix the position of the rotating cannula 2. The locking knob 7 abuts against the rotating cannula 2. A digital display 8 is provided at the other end of the rotating sleeve 6 away from the rotating cannula 2. The digital display 8 is electrically connected to the displacement sensor 5 to display the measured value in real time. At this time, the rotating cannula 2 is fixed by tightening the locking knob 7, thereby sensing the scale on the measuring catheter 1 and displaying the retraction distance on the digital display 8. In order to facilitate quick and accurate reading of the measured value, the digital display 8 provided on the rotating sleeve 6 can follow the movement of the miniature endoscope in real time and display the changing value accordingly. It can also display according to the real-time dynamic value changes. Its principle is similar to that of a digital micrometer, so its working principle will not be described in detail.

[0030] It is worth noting that after measuring the length of the prostatic urethra using displacement sensor 5, the width of the prostatic urethra can be calculated based on the angle between the rotating sleeve 6 and the rotating cannula 2. This calculation method can be determined based on the geometric relationship of the instrument design and the measurement principle. Thus, the formula for calculating the width of the prostatic urethra is 2x = ysinθ, where x represents the width of the prostatic urethra, y represents the length of the measuring catheter 1 pushed inward, and θ represents the internal angle between the rotating sleeve 6 and the rotating cannula 2. Substituting this formula, the transverse diameter of the prostate can be calculated, thereby enabling rapid measurement of the inner diameter of the human urinary tract. This facilitates the rapid selection of a suitable model of transurethral resection of the prostate (TURP) endoscope, reducing the surgical pain of urethral dilation for patients and making the surgical operation safer and more reliable.

[0031] In this embodiment, the measuring catheter 1 includes a straight section 11 and a bent section 12. The straight section 11 and the bent section 12 are integrally formed, and a scale line 9 is provided between the outer surface of the straight section 11 and the posterior outer side of the positioning cavity 3. The bent section 12 bends outward toward the side of the straight section 11, and the head of the bent section 12 is blunt and rounded.

[0032] Specifically, the measuring catheter 1 is made of stainless steel, and the front end of the measuring catheter 1 is set as a curved section 12. The head of the curved section 12 has a blunt rounded structure and a smooth surface. The arc shape of the curved section 12 can conform to the structure of the human urinary cavity, so that when the measuring catheter 1 is inserted into the urethra and bladder, it can reduce the damage to the tissue. At the same time, it can also facilitate the quick insertion of the catheter into the urethra. The straight section 11 is set as a hollow cylindrical structure, which is conducive to inflating the positioning bladder 3 through the inflation piston 4. After the curved section 12 is inserted into the bladder, the positioning bladder 3 expands to prevent the measuring catheter 1 from falling out. It can also facilitate the measurement of the diameter of the prostatic urethra.

[0033] In this embodiment, the diameter of the straight section 11 is smaller than the diameter of the elbow section 12, and the outer surface of the end of the straight section 11 is configured with an external thread structure.

[0034] Specifically, an external thread structure is provided at the end of the straight section 11, which can be quickly connected to the rotating sleeve 2. Under the action of the rotating sleeve 6, the rotating sleeve 2 can make the rotating sleeve 2 move in a spiral motion along the length direction of the straight section 11. An internal thread structure adapted to it is provided inside the rotating sleeve 2. The rotating sleeve 2 is threadedly connected to the straight section 11 through the internal thread structure.

[0035] In this embodiment, the rotating sleeve 2 is a transparent tube, and one end of the rotating sleeve 2 abuts against the rear end of the positioning bladder 3. The outer surface of the rotating sleeve 2 is engraved with the same scale line 9 as the straight section 11.

[0036] Specifically, in order to more intuitively observe the measured length, the rotating sleeve 2 is made into a transparent tube, which makes it easier to observe the scale line 9 on the measuring tube 1. At the same time, the same scale line 9 as the straight section 11 is engraved on the outer surface of the rotating sleeve 2. This makes it easier to observe the measured data and also avoids the rotating sleeve 2 affecting the reading of the measuring tube 1.

[0037] In this embodiment, the positioning bladder 3 is located at the end of the bend section 12, and the positioning bladder 3 is normally attached to the outer surface of the measuring catheter 1, and expands in a ring shape after being inflated by the inflation piston 4.

[0038] Specifically, the positioning cavity 3 can be filled with gas or water for expansion. During injection, gas or water is injected into the inflation piston 4 using a syringe, causing the gas or water to flow through the measuring catheter 1 and out through the air hole 13 into the positioning cavity 3, causing it to expand rapidly. This allows the positioning cavity 3 to be secured between the bladder and the urethral opening, preventing the measuring catheter 1 from falling off and also enabling rapid positioning of the starting point of prostate measurement, making the testing structure more accurate.

[0039] It is worth mentioning that the working process of the human urinary tract diameter measuring instrument using this utility model is as follows:

[0040] First, before performing laparoscopic surgery on the prostate, prepare the measuring instrument for the internal diameter of the human urinary tract according to this invention, ensuring that all components are intact and that the inflation piston 4 is functioning properly to control the inflation and deflation of the positioning bladder 3. Then, slowly insert the curved end of the measuring catheter 1 into the patient's urethra, gradually penetrating along the urinary tract until it reaches the bladder. Inflate the positioning bladder 3 using the inflation piston 4, causing it to expand and stabilize within the bladder. At this point, the position of the measuring catheter 1 is relatively fixed, laying the foundation for accurate subsequent measurements. Next, manually rotate the rotating sleeve 2 to move it along the outer wall of the measuring catheter 1. During rotation, observe the changes in the scale on the rotating sleeve 6 with the slope indicator and record the scale values ​​corresponding to different positions. Finally, calculate the width of the prostatic urethra using the formula 2x = ysinθ.

[0041] In addition, basic information such as the patient's height and weight can be recorded, and the measured data such as the internal diameter of the urinary cavity can be analyzed together with the patient's height and weight data. By comparing and studying data such as the complications of previous patients, the most suitable electrosurgical resection endoscope model can be determined so that the appropriate electrosurgical resection endoscope tool can be used in subsequent surgeries, reducing the surgical risks and patient suffering caused by model mismatch.

[0042] Example 2

[0043] Unlike Embodiment 1, this embodiment utilizes a straight-tube rotating cannula to facilitate observation of the prostatic urethra's internal diameter. A miniature endoscopic camera is positioned at one end of the rotating cannula, allowing direct observation of the insertion position of the rotating cannula and the length of the prostatic urethra. The width of the prostatic urethra can then be quickly calculated using the formula 2x = ysinθ. This method not only eliminates the need for balloon fixation, offering convenience and speed, but also allows for the use of other instruments instead of the miniature endoscopic camera. For example, a ureteroscope channel can be inserted into the rotating cannula to quickly measure the urethral diameter; alternatively, a measuring catheter can be directly inserted into the ureteroscope channel, and the urethral diameter can be calculated based on the relationship between the measuring catheter's diameter and the ureteroscope channel, thus achieving various measurement effects.

[0044] The measurement of prostatic urethral width using a miniature endoscopic camera and ureteroscope channel is simple and accurate, requiring no other examination equipment, thus reducing patient examination costs. It can also guide accurate and complete treatment of benign prostatic hyperplasia (BPH) patients with varying degrees of benign prostatic hyperplasia using mesh stents and microwave irradiation. This examination can be performed directly before treatment without any special preparation from the patient. Furthermore, by collecting patient data such as height and weight and comparing it with measurement data and complication reports, it is possible to determine the appropriate electrocautery endoscope model for Asian men, facilitating the production of more targeted products by manufacturers. This approach has promising clinical application prospects and social benefits.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A measuring instrument for the internal diameter of the human urinary tract, comprising a measuring catheter and a rotating cannula, characterized in that, The measuring catheter has a hollow tube structure, with a positioning bladder at one end for fixing it in the bladder and an inflation piston at the other end for inflating the positioning bladder. An air hole is provided at the positioning bladder location of the measuring catheter, and the air hole is connected to both the positioning bladder and the measuring catheter. A rotating sleeve is fitted onto the outer surface of the measuring catheter, and a displacement sensor is provided at the end of the rotating sleeve closest to the positioning bladder. A rotating sleeve is provided at the other end of the rotating sleeve, and the rotating sleeve is rotatably connected to the rotating sleeve.

2. The measuring instrument for the internal diameter of the human urinary tract according to claim 1, characterized in that, The rotating sleeve is provided with a locking knob at one end near the rotating sleeve to limit the movement and fix the position of the rotating sleeve, and the locking knob abuts against the rotating sleeve; the rotating sleeve is provided with a digital display at the other end away from the rotating sleeve, and the digital display is electrically connected to the displacement sensor to display the measured values ​​in real time.

3. The measuring instrument for the internal diameter of the human urinary tract according to claim 2, characterized in that, The measuring catheter includes a straight section and a bent section. The straight section and the bent section are integrally formed, and a scale line is provided between the outer surface of the straight section and the posterior outer side of the positioning cyst. The bent section is bent outwards to one side of the straight section, and the head of the bent section is blunt and rounded.

4. The measuring instrument for the internal diameter of the human urinary tract according to claim 3, characterized in that, The diameter of the straight section is smaller than that of the elbow section, and the outer surface of the end of the straight section is configured with an external thread structure.

5. The measuring instrument for the internal diameter of the human urinary tract according to claim 4, characterized in that, The rotating sleeve has an internal thread structure, and the rotating sleeve is threadedly connected to the straight section through the internal thread structure.

6. The measuring instrument for the internal diameter of the human urinary tract according to claim 5, characterized in that, The rotating sleeve is a transparent tube, and one end of the rotating sleeve abuts against the rear end of the positioning bladder. The outer surface of the rotating sleeve is engraved with the same scale lines as the straight section.

7. The measuring instrument for the internal diameter of the human urinary tract according to claim 6, characterized in that, The positioning bladder is located at the end of the bend section, and under normal conditions, the positioning bladder is in close contact with the outer surface of the measuring catheter, and expands in a ring shape after being inflated by the inflation piston.

8. The measuring instrument for the internal diameter of the human urinary tract according to claim 7, characterized in that, The inflation piston is equipped with an inflation valve, which is a one-way valve.

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