Simulation instrument for operation in bladder

Abstract

The invention discloses a simulation instrument for operation in a bladder, and belongs to the field of medical instruments, and the simulation instrument comprises a body cavity simulation structure which is internally provided with a closed simulation body cavity; the elastic simulation bladder is arranged in the simulation body cavity, a plurality of traction lines are arranged on the outer wall of the elastic simulation bladder, the other ends of the traction lines are fixed to the inner wall of the body cavity simulation structure, and when the elastic simulation bladder is in a natural state, the elastic simulation bladder is maintained at an initial position by the traction lines; the simulation bladder neck is connected to the inner wall of the simulation body cavity and provided with a first end facing the elastic simulation bladder, and the elastic simulation bladder is provided with a connecting port connected to the first end in a sleeving mode; the simulation telescopic urethra is connected to the outer wall of the body cavity simulation structure and provided with a second end part deviating from the elastic simulation bladder, and an operation channel communicated with the elastic simulation bladder is arranged between the first end part and the second end part in a penetrating mode. Through the arrangement, physical limitation of a body cavity on the bladder can be simulated, so that a prostate block in the bladder can be taken out conveniently.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a bladder-operating simulation device. Background Technology

[0002] In urological clinics, minimally invasive transurethral bladder surgeries, such as transurethral resection of the prostate (TURP) and bladder tumor resection, are frequently performed. These surgeries require surgeons to possess advanced intravesical manipulation skills, including precise instrument control and handling of tissue fragments within confined spaces. Inexperienced surgeons are prone to damaging surrounding tissues along the surgical approach during these procedures; therefore, simulation training using manipulatives is necessary.

[0003] Current simulation training tools, such as the model disclosed in Chinese Patent CN104900126A - Training Model and Method for Minimally Invasive Surgery of the Lower Urinary Tract in Urology, simulate operations in a completely exposed environment. This "open" simulation cannot reproduce the actual situation in the real body environment, where the bladder wall is physically restricted by the peritoneum, fat, muscle, or other surrounding body cavity tissues. It is difficult to realistically simulate the anatomical environment and tissue texture inside the human abdominal cavity outside the body.

[0004] In terms of physician training, existing models are functionally limited and cannot meet the comprehensive training needs of complex procedures. For example, the model in the aforementioned patent can be used for cystoscopy and transurethral resection training, but its prostate model is fixed outside the bladder, making it impossible to simulate the crucial step of removing tissue fragments that fall into the bladder cavity after transurethral resection of the prostate. Furthermore, the existing training models use materials such as tofu and modeling clay to simulate proliferative tissue, which differs significantly from the feel of cutting real human tissue, greatly impacting the realism of training and the effectiveness of skill transfer.

[0005] Therefore, a simulation device is proposed that can simulate the physical constraints of body cavities on the bladder and realistically reproduce the procedure of removing prostate fragments from the bladder to meet the needs of clinical skills training; specifically, this simulation device is a simulation device for intrabladder operations. Summary of the Invention

[0006] To overcome the problems mentioned in the background art, the present invention adopts the following technical solution: A bladder manipulation simulation device includes: a body cavity simulation structure, the interior of which forms a closed simulated body cavity; an elastic simulated bladder disposed within the simulated body cavity, the outer wall of the elastic simulated bladder having a plurality of non-parallel traction lines, the other end of which is fixed to the inner wall of the body cavity simulation structure, the elastic simulated bladder being held in an initial position by the traction lines in a natural state; a simulated bladder neck connected to the inner wall of the simulated body cavity and having a first end facing the elastic simulated bladder, the elastic simulated bladder having a connection port sleeved on the first end; and a simulated telescopic urethra connected to the outer wall of the body cavity simulation structure and having a second end facing away from the elastic simulated bladder, a surgical channel penetrating between the first end and the second end, the surgical channel communicating with the interior of the elastic simulated bladder.

[0007] Furthermore, the elastic simulated bladder has an internal accommodating cavity that communicates with the connecting port, and the accommodating cavity contains multiple simulated prostate tissue blocks.

[0008] Furthermore, when the elastic simulated bladder is in its natural state, it restricts the movement of the simulated prostate tissue blocks, causing multiple simulated prostate tissue blocks to converge; when fluid enters the accommodating cavity through the surgical channel, the elastic simulated bladder expands and deforms, and the simulated prostate tissue blocks disperse under the influence of fluid and gravity.

[0009] Furthermore, an elastic band is provided inside the simulated body cavity. When the elastic simulated bladder is in a natural state, the elastic band is also in a natural state, and the outer wall of the elastic simulated bladder is in contact with the outer wall of the elastic band.

[0010] Furthermore, a first limiting groove is provided around the outer wall of the first end, and the elastic simulated bladder has a connecting end facing the first end, and the connecting port is provided at the connecting end; when the connecting port of the elastic simulated bladder is sleeved on the outer wall of the first end, a binding line is attached to the outer wall of the connecting end, and the binding line restricts the relative movement between the connecting end and the first end.

[0011] In addition, it also includes the application method of the simulation device, which includes the following steps: S1. Place the simulated prostate tissue block into the accommodating cavity; S2. Fix the elastic simulated bladder to the body cavity simulation structure through the traction wire, and fix its connecting end to the first end of the simulated bladder neck; S3. Adjust the length of the simulated telescopic urethra according to the needs of the simulation operation; S4. Insert the operating instrument into the receiving cavity through the surgical channel, and perform operations on the elastic simulated bladder wall or simulated prostate tissue block under the confinement environment of the body cavity simulated by the traction wire.

[0012] The beneficial effects of this invention are: 1. This invention incorporates a body cavity simulation structure, an elastic simulated bladder, traction wires, and elastic bands. Through the combination of these features, the physical constraints of the body cavity on the bladder wall are effectively simulated outside the body. This allows inexperienced physicians to perform instrument operation and skills training in a highly simulated mechanical environment, greatly enhancing the effectiveness of simulation training.

[0013] 2. The adjustable urethral simulation unit can adapt to the anatomical differences of different patients and different types of operating instruments, enhancing the versatility of the simulation device. Furthermore, this device is not limited to prostate fragment removal; it can also be used to simulate various intrabladder procedures such as bladder tumor resection and foreign body removal, making its application wide-ranging.

[0014] 3. By using pig bladders as a simulated bladder and cow hearts as a simulated prostate tissue, the realistic tactile sensation of biological tissues is effectively recreated. The tactile experience during cutting, grasping, or suction provides a more realistic simulation compared to materials like clay or tofu. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 A three-dimensional view of an assembly structure of the present invention when the elastic simulated bladder is in its natural state; Figure 2 A top view of an assembly structure of the present invention when the elastic simulated bladder is in its natural state; Figure 3 for Figure 2 A schematic diagram of a cross-sectional structure along direction A; Figure 4 for Figure 2 A schematic diagram of a cross-sectional structure along the B direction; Figure 5 for Figure 2 A magnified view of a local structure at point C; Figure 6 A three-dimensional view of an assembly structure of the present invention during elastic simulation of bladder expansion; Figure 7 This is a top view of an assembly structure of the present invention during elastic simulation of bladder expansion; Figure 8 for Figure 7 A schematic diagram of a cross-sectional structure along the D direction; Figure 9 for Figure 7 A schematic diagram of a cross-sectional structure along the E direction; In the diagram, 1. Simulated body cavity structure; 11. Simulated body cavity; 12. Traction line; 13. Elastic band; 2. Elastic simulated bladder; 21. Receptive cavity; 211. Simulated prostate tissue block; 22. Connecting end; 221. Connecting port; 23. Binding line; 3. Simulated bladder neck; 31. First end; 311. First limiting groove; 32. Surgical channel; 4. Simulated telescopic urethra; 41. Second end. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention are clearly and completely described below through specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] A bladder-operating simulation device, such as Figure 1-9As shown, the system includes: a body cavity simulation structure 1, which forms a closed simulated body cavity 11; and an elastic simulated bladder 2, which is located within the simulated body cavity 11. The outer wall of the elastic simulated bladder 2 is provided with several non-parallel traction lines 12, the other end of which is fixed to the inner wall of the body cavity simulation structure 1. When the elastic simulated bladder 2 is in its natural state, it is maintained in an initial position by the traction lines 12. There are at least four traction lines 12, which are arranged in pairs on both sides of the elastic simulated bladder 2, and the positions of their fixing points on the inner wall of the body cavity simulation structure 1 are adjustable. The mirrored arrangement of the traction lines 12 and the adjustable fixing point mechanism allow for dynamic adjustment of the bladder's position and tension, thereby simulating the bladder's limitation by surrounding peritoneum, muscles, and other tissues in the real human body. This solves the problem that existing models cannot reproduce the physical limitations of the bladder wall in the real in vivo environment. The adjustable traction lines 12 achieve adaptability to the anatomical differences of different patients, improving the realism of the training. Specifically, by adjusting the fixing points, the displacement or compression state of the bladder within the body cavity can be simulated, increasing the difficulty of the doctor's simulated operation. In some embodiments, the fixing point of the traction wire 12 is a through hole between the inner and outer walls of the simulated body cavity structure 1. The traction wire 12 is a thread that passes through the through hole and is elastic. The portion of the thread remaining outside the simulated body cavity 11 is connected to a clamp. The part of the thread clamped by the clamp cannot pass through the through hole. Before the simulated surgery, the doctor adjusts the distance between the clamped position of different traction wires 12 and the simulated bladder. Combined with the elasticity of the traction wire 12 itself, the doctor can simulate the restriction of the bladder by real tissue under different operational requirements. In other embodiments, the inner wall of the simulated body cavity 11 is provided with a metal layer, and the end of the traction wire 12 away from the simulated bladder is provided with a strong magnet. This allows the doctor to connect any traction wire 12 to different positions on the inner wall of the simulated body cavity 11 before performing the simulated operation, effectively improving the connection flexibility between the traction wire 12 and the simulated body cavity 11.

[0018] A simulated bladder neck 3 is connected to the inner wall of the simulated body cavity 11 and has a first end 31 facing the elastic simulated bladder 2. The elastic simulated bladder 2 has a connection port 221 that fits onto the first end 31. A simulated telescopic urethra 4 is connected to the outer wall of the simulated body cavity structure 1 and has a second end 41 facing away from the elastic simulated bladder 2. A surgical channel 32 is provided between the first end 31 and the second end 41, and the surgical channel 32 communicates with the interior of the elastic simulated bladder 2. The simulated telescopic urethra 4 consists of an inner tube made of elastic thin tubing made of rubber and a corrugated tube wrapped with aluminum foil. After the user adjusts the axial length of the simulated telescopic urethra 4 by squeezing and pulling, the simulated telescopic urethra 4 can be reset under the elastic action of the elastic thin tubing. The connection between the simulated bladder and the first end 31 is a biomimetic design. The first end 31 of the simulated bladder neck 3 is provided with a conical or grooved structure, so that the connection port 221 of the elastic simulated bladder 2 can be tightly fitted through interference fit or elastic deformation. This not only simulates the anatomical connection between the bladder neck and the bladder in reality, but also provides a dynamic sealing effect for their connection. During simulated prostate resection, the expansion and deformation of the bladder does not disrupt the connection, allowing the physician to focus on instrument manipulation. In simulation training, when the bladder expands due to fluid input, the connection maintains an effective seal, preventing fluid leakage, while allowing slight displacement of the simulated bladder to simulate the adaptability of in vivo tissues. Thus, a high degree of realism is achieved through a simple structure, further addressing the problems of existing models: limited functionality and inability to reproduce complex anatomical environments.

[0019] In some embodiments of this application, such as Figure 1-9As shown, the elastic simulated bladder 2 has an internal accommodating cavity 21, which is connected to a connecting port 221. Multiple simulated prostate tissue blocks 211 are housed within the accommodating cavity 21. Existing training models cannot simulate scenarios such as the removal of bladder tissue fragments via the urethra after transurethral resection of the prostate. By introducing tissue blocks that can be placed within the bladder, the grasping, crushing, and removal of these fragments can be effectively simulated. Both the elastic simulated bladder 2 and the simulated prostate tissue blocks 211 are made of biomaterials; specifically, the elastic simulated bladder 2 is made from a pig bladder, and the simulated prostate tissue blocks 211 are made from a cow's heart. By using biomaterials such as pig bladders and cow hearts instead of traditional organ simulation materials like tofu or clay, realistic feedback can be generated during cutting and grasping, providing mechanical properties closer to human tissue. The cutting feel of existing models differs significantly from that of real human tissue, while this solution significantly improves skill transfer through the natural elasticity and texture of biomaterials. The rubber inner tube possesses flexibility and elasticity, replicating the softness of the urethral mucosa; while the aluminum foil corrugated tube provides structural rigidity and extensibility, allowing the urethra to be adjusted in axial length through compression and traction. Furthermore, this combination can simulate the contraction and rotation of the male genitalia, thus recreating potential problems encountered during the insertion of surgical instruments into the patient's bladder. The segmental structure of the corrugated tube allows for length changes and bending repositioning of the urethra during manipulation, simulating realistic physiological postures such as those during urination or instrument insertion, facilitating the realization of simulated multi-degree-of-freedom urethral movement.

[0020] In some embodiments of this application, such as Figure 1-9 As shown, when the elastic simulated bladder 2 is in its natural state, it restricts the movement of the simulated prostate tissue blocks 211, causing multiple simulated prostate tissue blocks 211 to converge. When fluid enters the accommodating cavity 21 through the surgical channel 32, the elastic simulated bladder 2 expands and deforms, and the simulated prostate tissue blocks 211 disperse under the influence of fluid and gravity. In actual prostate tissue block removal operations, the bladder contents of different patients are different, and the distribution of the fragmented prostate tissue is also different. In this embodiment, the volume of the accommodating cavity 21 can be controlled by injecting or withdrawing fluid into the elastic simulated bladder 2. When the fluid enters the accommodating cavity 21, it gradually releases the restriction of the position and shape of the simulated prostate tissue blocks 211, allowing the simulated prostate tissue blocks 211 to be randomly distributed within the expanded accommodating cavity 21, thereby increasing the difficulty of simulation training and improving the simulation effect.

[0021] In some embodiments of this application, such as Figure 1-9As shown, an elastic band 13 is installed within the simulated body cavity 11. When the simulated elastic bladder 2 is in its natural state, the elastic band 13 is also in its natural state, and the outer wall of the simulated elastic bladder 2 contacts the outer wall of the elastic band 13. When only the traction wire 12 is used for simulated support, there are problems such as insufficient support for the lower part of the bladder or inaccurate reproduction of the contact sensation of the pelvic floor tissues. The elastic band 13 simulates the soft support of the bladder by the pelvic floor muscles and other tissues. The elastic band 13 provides lower support for the simulated bladder and forms a synergistic system with the traction wire 12 to simulate the dynamic support of the pelvic floor muscles for the bladder. Existing models have the problem of insufficient lower support for the bladder, while the elastic band 13, through its elastic deformation, provides a buffering effect for the simulated bladder when the bladder expands or contracts, replicating the interaction between the bladder and pelvic floor tissues in real surgery. Furthermore, when fluid enters the bladder, the elastic band 13 deforms with expansion, which can prevent excessive displacement of the bladder. Combined with the upper restriction of the traction wire 12, it can reproduce a more comprehensive simulation of the body cavity environment.

[0022] In some embodiments of this application, such as Figure 1-9 As shown, a first limiting groove 311 is provided around the outer wall of the first end 31. The elastic simulated bladder 2 has a connecting end 22 facing the first end 31, and a connecting port 221 is provided at the connecting end 22. When the connecting port 221 of the elastic simulated bladder 2 is sleeved on the outer wall of the first end 31, a binding line 23 is tied to the outer wall of the connecting end 22. The binding line 23 restricts the relative movement between the connecting end 22 and the first end 31. When the binding line 23 is tightened on the connecting end 22, the corresponding part of the elastic simulated bladder 2 is pressed into the first limiting groove 311, which not only prevents the elastic simulated bladder 2 from detaching from the simulated bladder neck 3, but also seals the connection between the simulated bladder neck 3 and the elastic simulated bladder 2.

[0023] In addition, it also includes the application method of the simulation device, which includes the following steps: S1. Place the simulated prostate tissue block 211 into the receiving cavity 21; S2. The elastic simulated bladder 2 is fixed inside the body cavity simulation structure 1 by the traction wire 12, and its connecting end 22 is fixed to the first end 31 of the simulated bladder neck 3. S3. Adjust the length of the simulated telescopic urethra 4 according to the needs of the simulation operation; S4. Insert the operating instrument into the receiving cavity 21 through the surgical channel 32, and perform operations on the inner wall of the elastic simulated bladder 2 or the simulated prostate tissue block 211 under the confinement environment of the body cavity simulated by the traction line 12.

Claims

1. A bladder-operating simulation device, characterized in that, include, A body cavity simulation structure, the interior of which forms a closed simulated body cavity; An elastic simulated bladder is disposed within the simulated body cavity. The outer wall of the elastic simulated bladder is provided with several non-parallel traction lines. The other end of the traction lines is fixed to the inner wall of the simulated body cavity structure. When the elastic simulated bladder is in a natural state, it is maintained in an initial position by the traction lines. A simulated bladder neck is connected to the inner wall of the simulated body cavity and has a first end facing the elastic simulated bladder, the elastic simulated bladder having a connection port that fits onto the first end. A simulated telescopic urethra is connected to the outer wall of the body cavity simulation structure and has a second end opposite to the elastic simulated bladder. A surgical channel is provided between the first end and the second end, and the surgical channel communicates with the interior of the elastic simulated bladder.

2. The bladder manipulation simulator according to claim 1, characterized in that, The elastic simulated bladder has an internal cavity that communicates with the connection port, and the cavity contains multiple simulated prostate tissue blocks.

3. The bladder manipulation simulator according to claim 2, characterized in that, When the elastic simulated bladder is in its natural state, it restricts the movement of the simulated prostate tissue blocks, causing multiple simulated prostate tissue blocks to converge; when fluid enters the accommodating cavity through the surgical channel, the elastic simulated bladder expands and deforms, and the simulated prostate tissue blocks disperse under the influence of fluid and gravity.

4. The bladder manipulation simulator according to claim 1, characterized in that, An elastic band is provided inside the simulated body cavity. When the elastic simulated bladder is in a natural state, the elastic band is also in a natural state, and the outer wall of the elastic simulated bladder is in contact with the outer wall of the elastic band.

5. The bladder manipulation simulator according to claim 1, characterized in that, The outer wall of the first end is provided with a first limiting groove, and the elastic simulated bladder has a connecting end facing the first end, and the connecting port is provided at the connecting end; when the connecting port of the elastic simulated bladder is sleeved on the outer wall of the first end, the outer wall of the connecting end is tied with a binding line, and the binding line restricts the relative movement between the connecting end and the first end.

6. The bladder manipulation simulator according to claim 1, characterized in that, The simulated telescopic urethra consists of an inner tube made of elastic thin tubing made of rubber, and the outer part of the inner tube is wrapped with an aluminum foil corrugated tube.

7. The bladder manipulation simulator according to claim 1, characterized in that, The number of traction wires is at least four, and the traction wires are arranged in pairs and mirror images on both sides of the elastic simulated bladder.

8. The bladder manipulation simulator according to claim 2, characterized in that, The elastic simulated bladder is made from a pig bladder, and the simulated prostate tissue block is made from a bovine heart.

9. A method for intrabladder manipulation training using the simulator according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Place the simulated prostate tissue block into the accommodating cavity; S2. Fix the elastic simulated bladder to the body cavity simulation structure through the traction wire, and fix its connecting end to the first end of the simulated bladder neck; S3. Adjust the length of the simulated telescopic urethra according to the needs of the simulation operation; S4. Insert the operating instrument into the receiving cavity through the surgical channel, and perform operations on the elastic simulated bladder wall or simulated prostate tissue block under the confinement environment of the body cavity simulated by the traction wire.

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