Model teaching aid for learning catheterization and bladder inner wall hyperemia
The bladder model prepared by 3D printing technology, combined with a peristaltic pump and pressure sensor, solves the problem that existing models cannot simulate the congestion of the bladder wall, and realizes the true reproduction of bladder function and the improvement of operation skills.
Patent Information
- Application Number
- CN202511117531.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2025-09-16
AI Technical Summary
Existing urethral catheterization models are difficult to simulate the congestion response of the bladder wall and cannot truly reflect bladder pressure changes, resulting in limited ability of medical staff to respond to complex operations and abnormal situations during training.
3D printing technology is used to prepare an elastic bladder model with built-in blood vessels and pressure sensors. A peristaltic pump is used to simulate pressure changes in the bladder to achieve a congestion response of the bladder wall. A blood transfusion tube and a fluid reservoir are combined to simulate the flow of urine and blood.
It achieves a true reproduction of bladder function, can simulate the expansion and contraction process of the bladder, intuitively display the congestion phenomenon of the bladder wall, and improve the operation skills and emergency handling capabilities of medical staff.
Smart Images
Figure CN120656367A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of medical teaching aids, and in particular relates to a model teaching aid for learning urethral catheterization and bladder inner wall congestion. Background Art
[0002] With the continuous advancement of medical technology, clinical skills training plays a vital role in improving medical staff's operational capabilities and emergency response capabilities. Precise operational skills and an understanding of pathological conditions are particularly important in the diagnosis and treatment of urethral catheterization and bladder diseases. Currently, training in clinical operational skills such as urethral catheterization and bladder congestion relies heavily on traditional teaching models. While these models can simulate basic physiological structures in some aspects, they are insufficiently functional and cannot replicate realistic operational scenarios and pathological changes.
[0003] While existing urethral catheterization models can simulate the catheterization process, they are often injection-molded or compression-molded, making it difficult to create the subtle, simulated "blood vessel" structures within the bladder model's inner wall. Consequently, they struggle to accurately reflect pathological reactions, such as bladder wall congestion caused by decreased bladder pressure after urine discharge. This makes it difficult to provide a feedback mechanism consistent with actual clinical settings, limiting medical staff's ability to respond to complex procedures and unusual situations during training.
[0004] 3D printing (3DP), also known as additive manufacturing, is a technology that creates physical parts based on three-dimensional CAD data by adding material layer by layer. Due to its unique properties, 3D printing technology is capable of producing microstructures such as blood vessels and producing products with exceptional precision. In recent years, the use of 3D printing technology in the biomedical field has become a research and development hotspot. Summary of the Invention
[0005] To overcome the above-mentioned technical problems, the present invention provides a model teaching aid for learning catheterization and bladder wall congestion. It can not only accurately simulate the catheterization process, but also the inner wall of the bladder model made by 3D printing technology has vascular simulated blood vessels, which can realistically reproduce the congestion response of the bladder wall under changes in bladder pressure, thereby helping medical staff better understand and master related skills during training.
[0006] The present invention adopts the following technical solutions: A model teaching aid for learning urinary catheterization and bladder wall congestion includes a 3D-printed elastic bladder model, an observation port on one side of the bladder model connected to a transparent observation plate, a urethra at the bottom of the bladder model, an elastic closure valve provided in the urethra, a ureter connected to the top of the bladder model, the ureter communicating with the internal space of the bladder model, the other end of the ureter connected to a first fluid reservoir, and a first peristaltic pump provided on the ureter; a blood transfusion tube connected to the top of the bladder model, one end of the blood transfusion tube connected to a second fluid reservoir, and a second peristaltic pump provided on the blood transfusion tube; a blood vessel laid on the inner wall of the bladder model, the other end of the blood vessel connected to the blood vessel, and a pressure sensor provided on the inner wall of the bladder model, the pressure sensor connected to a processor, and the processor controlled the connection to the second peristaltic pump.
[0007] Preferably, a support plate is placed behind the bottom of the observation plate.
[0008] The present invention also discloses a method for using a model teaching aid for learning urinary catheterization and bladder wall congestion, which uses the above-mentioned model teaching aid and further includes the following: S1. Place the device upright, power it on, and start the peristaltic pump to inject the urine-representing liquid in the reservoir into the internal cavity of the bladder model, simulating the accumulation of urine in the bladder. S2. Take an additional catheter and insert it through the urethra into the bladder model to drain the fluid inside the bladder model. Learn and demonstrate urinary catheterization. When S3.S1 injects liquid into the bladder model, the bladder model expands and the pressure inside the bladder model increases; when S2 drains the liquid out, the model shrinks and the pressure inside the bladder model decreases; when the processor detects through the sensor that the internal pressure of the bladder model drops sharply to a preset value, it starts peristaltic pump 2 to inject the liquid representing the blood in reservoir 2 into the blood vessel through infusion tube 2, causing the blood vessel to expand and bulge, simulating the congestion of the bladder wall caused by excessive urination in patients with urinary retention.
[0009] S4. Start the peristaltic pump 2 to operate in reverse to pump the liquid in the vascular tube back to the liquid reservoir 2.
[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The device realistically reproduces bladder function and its changes. It features a 3D-printed elastic bladder model that simulates the expansion and contraction of the bladder. When liquid is injected into the bladder model, the bladder gradually expands, simulating the changes in an actual bladder as urine accumulates. During catheterization, the decrease in bladder pressure and the retraction of the model truly reflect the physiological processes of the bladder. 2. The bladder model is 3D-printed, with vessels on its inner wall to mimic the capillaries of the bladder. The model is equipped with a second peristaltic pump that controls the injection of fluid into the vessels to simulate bladder wall congestion caused by excessive urination or urine retention. This feature helps students better understand the pathological mechanism of bladder wall congestion and effectively practice related operations. 3. Easy to operate. Trainees only need to start the peristaltic pump to inject and drain bladder fluid. The operation is intuitive and easy to understand. 4. This model is not only suitable for routine training in medical schools, hospitals and other teaching institutions, but can also be used as a research tool to explore changes in bladder physiology and pathology, which has a positive role in promoting both academic research and clinical practice; In summary, the teaching model of this program enables medical staff to receive more intuitive and comprehensive training in practice through highly simulated physiological and pathological simulations, thereby improving their clinical operation skills and emergency response capabilities. It has broad application prospects and important teaching significance. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0012] Description of reference numerals: 1. Observation board; 2. Bladder model; 3. Pressure sensor; 4. Processor; 5. Second reservoir; 6. Second peristaltic pump; 7. Second infusion tube; 8. First reservoir; 9. First peristaltic pump; 10. First infusion tube; 11. Vascular tube; 12. Urethra. DETAILED DESCRIPTION
[0013] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Unless otherwise specified, the raw materials and equipment used are commercially available or commonly used in the art. The methods in the embodiments, unless otherwise specified, are conventional methods in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.
[0014] Model teaching aids for learning catheterization and bladder lining congestion: The device includes a 3D-printed, elastic bladder model. One side of the model features an observation port, sealed to a transparent observation panel. The panel allows for observation of the bladder model's internal cavity. A support plate is attached to the bottom rear of the observation panel, allowing the device to be placed vertically. The bladder model has a urethra at its base, with an elastic closure valve within. A ureter is connected to the top of the model, connecting the ureter to the interior of the bladder model. The other end of the ureter is connected to a first fluid reservoir, which is equipped with a first peristaltic pump. A blood vessel is also connected to the top of the model, one end of which is connected to a second fluid reservoir, which is equipped with a second peristaltic pump. The inner wall of the bladder model is lined with blood vessels, the other end of which is connected to the blood vessels. A pressure sensor is also installed on the inner wall of the bladder model, connected to a processor, which controls the connection to the second peristaltic pump.
[0015] Methods for using a model teaching aid for learning urinary catheterization and bladder wall congestion include the above-mentioned model teaching aid and the following: S1. Place the device upright, power it on, and start the peristaltic pump to inject the urine-representing liquid in the reservoir into the internal cavity of the bladder model through the infusion tube, simulating the accumulation of urine in the bladder. S2. Take an additional catheter and insert it through the urethra into the bladder model to drain the fluid inside the bladder model. Learn and demonstrate urinary catheterization. When S3.S1 injects liquid into the bladder model, the bladder model expands and the pressure inside the bladder model increases; when S2 drains the liquid out, the model shrinks and the pressure inside the bladder model decreases; when the processor detects through the sensor that the internal pressure of the bladder model drops sharply to a preset value, it starts peristaltic pump 2 to inject the liquid representing the blood in reservoir 2 into the blood vessel through infusion tube 2, causing the blood vessel to expand and bulge, simulating the congestion of the bladder wall caused by excessive urination in patients with urinary retention.
[0016] S4. Start the peristaltic pump 2 to operate in reverse, draw the liquid in the vascular tube back to the liquid reservoir 2, and reset.
[0017] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A model teaching aid for learning urinary catheterization and bladder wall congestion, comprising a 3D-printed elastic bladder model, with an observation port on one side of the bladder model sealed and connected to a transparent observation plate, characterized in that: The bladder model has a urethra at the bottom, with an elastic closure valve installed in the urethra. The top of the bladder model is connected to the ureter, which communicates with the internal space of the bladder model. The other end of the ureter is connected to a first reservoir, which is equipped with a first peristaltic pump. The top of the bladder model is also connected to a blood transfusion tube, one end of which is connected to a second reservoir, which is equipped with a second peristaltic pump. The inner wall of the bladder model is paved with blood vessels, the other end of which is connected to the blood vessels. The inner wall of the bladder model is also provided with a pressure sensor, which is connected to a processor, and the processor controls the connection to the second peristaltic pump.
2. The model teaching aid for learning urinary catheterization and bladder wall congestion according to claim 1, characterized in that: A support plate is placed at the rear bottom of the observation plate.
3. A method for using a model teaching aid for learning urinary catheterization and bladder wall congestion, characterized in that: The model teaching aid according to claim 1 further comprises the following: S1. Place the device upright, power it on, and start the peristaltic pump to inject the urine-representing liquid in the reservoir into the internal cavity of the bladder model, simulating the accumulation of urine in the bladder. S2. Take an additional catheter and insert it through the urethra into the bladder model to drain the fluid inside the bladder model. Learn and demonstrate urinary catheterization. When S3.S1 injects liquid into the bladder model, the bladder model expands and the pressure inside the bladder model increases; when S2 drains the liquid out, the model shrinks and the pressure inside the bladder model decreases; when the processor detects through the sensor that the internal pressure of the bladder model drops sharply to a preset value, it starts peristaltic pump 2 to inject the liquid representing the blood in reservoir 2 into the blood vessel through infusion tube 2, causing the blood vessel to expand and bulge, simulating the congestion of the bladder wall caused by excessive urination in patients with urinary retention. S4. Start the peristaltic pump 2 to operate in reverse to pump the liquid in the vascular tube back to the liquid reservoir 2.