A male catheterization operation training system

Abstract

The present application provides a male catheterization operation training system for training male catheterization operation using a narrow expansion type catheter, including a narrow expansion type catheter, a bladder simulation part, a urethra simulation part, a urethral stricture simulation part, a delayed reset control unit and a shell; the narrow expansion type catheter includes an expansion balloon located at the top of the catheter head, the urethral stricture simulation part can reset to simulate the movement state of the male urethral stricture part being expanded by the narrow expansion type catheter, and the delayed reset control unit detects the movement state and controls the delayed reset of the urethral stricture simulation part. The male catheterization operation training system provided by the present application can accurately simulate the characteristics of the inner membrane tissue of the urethral stricture part being compressed and expanded, and then gradually recovering, so that trainees can quickly become familiar with the catheterization operation steps and operation points of the narrow expansion type catheter, thereby improving the training effect.

Description

Technical Field

[0001] The present application relates to the technical field of medical teaching aids, and in particular to a training system for male catheterization using a narrow dilatation catheter. Background Art

[0002] Catheterization is a routine operation in clinical nursing. Specifically, the catheter is inserted into the bladder through the urethra to drain urine from the bladder to the outside of the body. The operation of catheterization itself is a serious stimulation to the urethra and bladder. The male urethra has a slender and curved structure. In addition, male patients who need catheterization in clinical practice may also have physiological and pathological urethral stenosis, which will increase the difficulty of catheterization and increase the damage to the lower urinary tract during the insertion process.

[0003] In order to solve the problem that when the top of the catheter head moves to the urethral stenosis, it is usually necessary to increase the external force to push it forward. The top of the head and the urethra at the urethral stenosis will cause shearing, which will cause friction and contusion of the urethral lining and may cause microbial infection. A catheter with a stenosis dilation function can be used for catheter insertion.

[0004] The stricture dilation catheter has an expansion balloon at the top of the catheter head. When encountering a urethral stricture during advancement, the expansion balloon will expand and expand the inner membrane tissue of the urethral stricture to exert vertical pressure to expand and deform it. After the expansion is released, the inner membrane tissue maintains the expanded state for a certain period of time, allowing the catheter to pass smoothly through the expanded urethral stricture. The structure and operation steps of the stricture dilation catheter are more complicated than those of conventional catheters. If you are not familiar with the operation, you often cannot play its advantages. Therefore, clinical nursing staff and urology nurses and other people need to undergo sufficient operation training.

[0005] However, existing catheterization teaching aids often have a urethral structure that is too simple and cannot accurately simulate the stress, deformation and recovery of the urethral stricture during the dilation operation, making it impossible for trainees to experience the real dilation operation, thus affecting the training effect.

[0006] Therefore, there is a need for a device specifically for training the use of a stricture dilatation catheter for male catheterization operations, which can realistically simulate the male urethra structure and physiological characteristics, especially the characteristics that the lining tissue of the urethral stricture remains expanded for a certain period of time after being compressed and expanded, so that the operation training of the stricture dilatation catheter is closer to the actual use situation, so that the trainees can quickly become familiar with the catheterization operation steps and operation points of the stricture dilatation catheter, thereby improving the training effect. Summary of the invention

[0007] The purpose of the present application is to provide a male catheterization operation training system, which can train the use of a narrow dilatation catheter to perform male catheterization operations.

[0008] The embodiments of the present application can be implemented through the following technical solutions:

[0009] A male catheterization operation training system is used for training male catheterization operation using a narrow dilatable catheter, comprising a narrow dilatable catheter, a bladder simulation part, a urethra simulation part, a urethral stricture simulation part, a delayed reset control unit and a shell, wherein the narrow dilatable catheter comprises an expansion balloon located at the top of the catheter head, the bladder simulation part comprises a hollow cavity whose shape imitates the bladder, the urethra simulation part comprises a hollow tubular channel whose shape imitates the male urethra, one end of the urethra simulation part is connected to the bladder simulation part, and the other end is connected to the external space, and the shell comprises a A shell and a cover plate are detachably connected, the shell is used to accommodate and fix the bladder simulation part, the urethra simulation part, the urethra stricture simulation part and the delayed reset control unit; the urethra simulation part also includes an expansion channel corresponding to the urethra stricture simulation part, and the expansion channel forms an opening on the tube wall of the urethra simulation part; the urethra stricture simulation part can resetably simulate the movement state of the male urethra stricture part being expanded by the stricture expansion type catheter, and the delayed reset control unit detects the movement state and controls the delayed reset of the urethra stricture simulation part.

[0010] Further, the urethral stricture simulation part includes two telescopic parts arranged opposite to each other on both sides of the urethral simulation part, and the telescopic part includes a simulation head of the inner membrane tissue protruding from the urethral stricture part, a resettable damper and a fixing part;

[0011] The resettable damper comprises a resettable piston rod and a sleeve covering the piston rod, the end of the piston rod is fixedly connected to the simulation head, and can drive the simulation head to resetably reciprocate along the expansion channel in a damping motion;

[0012] The resettable damper is fixedly installed inside the fixing portion.

[0013] Furthermore, the axis of the expansion channel is perpendicular to the axis of the urethra simulation part, the line connecting the two telescopic parts arranged on both sides of the urethra simulation part is perpendicular to the axis of the urethra simulation part, and the movement direction of the resettable damper is perpendicular to the axial direction of the urethra simulation part.

[0014] Furthermore, the distance between the two telescopic parts arranged opposite to each other on both sides of the urethra simulation part is set to:

[0015] When the resettable damper is not subjected to a compressive force, the dummy head is located within the expansion channel.

[0016] Furthermore, the delayed reset control unit includes a control module, a power module, an expansion state detection module and an expansion state maintaining module, the control module and the power module are encapsulated on a circuit substrate, the power module and the control module are electrically connected, the control module is electrically connected to the expansion state detection module and the expansion state maintaining module respectively, and the power module supplies power to the expansion state detection module and the expansion state maintaining module respectively through the control module.

[0017] Furthermore, the expansion state detection module is fixedly arranged on the movement path of the simulation head, and the distance between the expansion state detection module and the end of the simulation head away from the urethra simulation part is less than the maximum movement distance of the simulation head.

[0018] Furthermore, the expansion state maintaining module includes a magnet and a micro electromagnetic module, the magnet is fixedly arranged at the end of the simulation head away from the urethra simulation part, and the micro electromagnetic module is fixedly arranged toward the magnet, and the distance between the micro electromagnetic module and the magnet is set so that when the simulation head is located in a position touching the expansion detection module, the magnetic attraction force of the electromagnetic module on the magnet under the rated voltage state is greater than the restoring force of the resettable damper.

[0019] Furthermore, after the expansion state detection module is touched by the simulation head, the expansion state detection module sends a delayed trigger signal to the control module. After receiving the delayed trigger signal, the control module supplies power to the micro electromagnetic module with a preset voltage change waveform.

[0020] Specifically, the preset voltage change waveform is determined according to the recovery of the lining tissue of the urethral stricture after being compressed.

[0021] Preferably, the bladder simulation part includes a first half cavity and a second half cavity that are mirror-symmetrical, the contact surfaces of the first half cavity and the second half cavity have the same shape, and they are snapped together to form the complete bladder simulation part; the urethra simulation part includes a first semi-tubular channel and a second semi-tubular channel that are mirror-symmetrical, the contact surfaces of the first semi-tubular channel and the second semi-tubular channel have the same shape, and they are snapped together to form the complete urethra simulation part; the first half cavity and the first semi-tubular channel are integrally formed with the shell; the second half cavity and the second semi-tubular channel are integrally formed with the cover plate; the fixing part, the circuit substrate, the expansion state detection module and the micro electromagnetic module are detachably fixedly installed in the shell.

[0022] The male catheterization operation training system provided by the embodiment of the present application has at least the following beneficial effects:

[0023] 1. The urethral stricture simulation part simulates the urethral stricture through the telescopic parts arranged opposite to each other. The resettable damper can drive the simulation head to reciprocate along the expansion channel in a damping motion in a resettable manner, thereby more realistically simulating the force condition of the urethral stricture during expansion, so that the trainees can feel the feeling of being blocked by the urethral stricture during the advancement of the catheter during training.

[0024] 2. By detecting the movement state of the urethral stricture simulation part and controlling the delayed reset of the urethral stricture simulation part through the delayed reset control unit, the characteristics of the inner membrane tissue of the urethral stricture part being compressed and expanded, maintaining the expansion state and then gradually recovering can be more accurately simulated, so that the operation training of the stricture dilatation type catheter is closer to the actual use, so that the trainees can quickly become familiar with the catheterization operation steps and operation points of the stricture dilatation type catheter, thereby improving the training effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of catheterization operation for dilatation catheter;

[0026] Figure 2 This is a schematic diagram of the dilatation catheter being advanced to the urethral stricture;

[0027] Figure 3 It is a schematic diagram of the dilatation operation of the dilatation catheter at the urethral stricture;

[0028] Figure 4 A top view of the internal structure of the male catheterization operation training system according to an embodiment of the present application;

[0029] Figure 5 It is an exploded view of the assembly of the male catheterization operation training system according to an embodiment of the present application;

[0030] Figure 6 It is an assembly top view of the urethral stricture simulation part of the embodiment of the present application;

[0031] Figure 7 It is an exploded view of the assembly of the telescopic part of the embodiment of the present application;

[0032] Figure 8 A connection block diagram of a delayed reset control unit according to an embodiment of the present application;

[0033] Fig. 9 It is a schematic diagram of the expansion type urinary catheter being advanced to the simulated part of urethral stricture in the embodiment of the present application;

[0034] Fig.10 It is a schematic diagram of the expansion operation of the urethral stricture expansion simulation part in the embodiment of the present application;

[0035] Fig.11A voltage variation waveform of a specific implementation of an embodiment of the present application;

[0036] Fig.12 A schematic diagram of a simulation head maintained at a collision position according to an embodiment of the present application;

[0037] Fig.13 This is a voltage variation waveform of another specific implementation of the embodiment of the present application.

[0038] Numbers in the figure

[0039] 11 bladder simulation part, 11' bladder, 111 first half cavity, 112 second half cavity, 12 urethra simulation part, 12' urethra, 121 first semi-tubular channel, 122 second semi-tubular channel, 13 expansion channel, 13' urethral stricture part, 2 urethral stricture simulation part, 20 telescopic part, 21 simulation head, 22 resettable damper, 221 piston rod, 222 sleeve, 23 fixing part, 31 shell, 32 cover plate, 40 circuit substrate, 41 control module, 42 power module, 43 expansion state detection module, 44 expansion state maintaining module, 441 magnet, 442 micro electromagnetic module, 5 stricture expansion catheter, 51 catheter line, 52 urine inlet, 3 indwelling balloon, 54 expansion balloon, 541 fixing ring, 542 expansion part, 543 airway DETAILED DESCRIPTION

[0040] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0041] In addition, various components on the drawings are enlarged (thickened) or reduced (thinned) for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0042] Words importing the singular also include the plural and vice versa.

[0043] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly placed when the embodiments of the present application are used, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance. Their names may be different in the detailed description and claims of the present application.

[0044] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two components. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0045] like Figures 1 to 5 As shown, an embodiment of the present application provides a male catheterization operation training system for training male catheterization operation using a narrow dilatation catheter, comprising a narrow dilatation catheter 5, a bladder simulation part 11, a urethra simulation part 12, a urethral stricture part simulation part 2, a delayed reset control unit and a shell, wherein the narrow dilatation catheter comprises an expansion balloon 54 located at the top of the catheter head, the bladder simulation part 11 is a hollow cavity that imitates the shape of a bladder, the urethra simulation part 12 is a hollow tubular channel that imitates the shape of a male urethra, one end of the hollow tubular channel 12 is connected to the bladder simulation part 11, and the other end is connected to the external space, the shell comprises a shell 31 and a cover plate 32 that are detachably connected, and the shell is used to accommodate and fix the bladder simulation part, the urethra simulation part, the urethral stricture part simulation part 2 and the delayed reset control unit;

[0046] The urethra simulation part 12 includes an expansion channel 13 corresponding to the urethra stricture part simulation part 2, and the expansion channel 13 forms an opening on the tube wall of the urethra simulation part 12;

[0047] The catheter dilation training device includes a urethral stricture simulation part 2 and a delayed reset control unit. The urethral stricture simulation part 2 can resetably simulate the movement state of the male urethral stricture part being dilated by a stricture dilatation catheter. The delayed reset control unit detects the movement state and controls the delayed reset of the urethral stricture simulation part 2.

[0048] Specifically, Figures 1 to 3 1 is a schematic diagram of using a narrow expansion type urinary catheter 5 to perform an expansion operation on a urethral narrow portion 13'. The narrow expansion type urinary catheter 5 is fixedly provided with an expansion balloon 54 at the top of the head. The expansion balloon 54 is made of a flexible material with tension, and includes a fixing ring 541 and an expansion portion 542. The fixing ring 541 is wrapped around the top of the head of the urinary catheter 51 and covers an airway 543 provided in the wall of the urinary catheter. The expansion portion 542 has a smaller outer diameter when not inflated. Other structures included in the narrow expansion type urinary catheter 5 are common structures well known to those skilled in the art and will not be described in detail herein.

[0049] When the urinary catheter 5 encounters the urethral stricture 13' during advancement, Figure 2As shown in FIG. 1 , the catheter head with a larger outer diameter cannot pass through, while the expansion portion 542 with a smaller outer diameter can enter the narrow urethra 12'. Figure 3 As shown, the expansion part 542 is inflated through the airway 543, and the expansion part 542 expands accordingly. The generated compressive force acts vertically on the urethral endometrium of the urethral stricture 13', so that the urethral stricture 13' expands, and then the gas is discharged through the airway 543 to release the expansion of the expansion part 542. The endometrial tissue of the urethral stricture 13' can basically maintain the expanded state for a period of time after being compressed and deformed. At this time, the catheter 5 is continued to be pushed forward, and the top of the catheter head is easy to pass through the expanded urethra part. After the catheter head enters the bladder 11', the indwelling balloon 53 is expanded, so that the catheter head is fixed in the bladder 11'. At this time, the urine in the bladder 11' is discharged from the body through the urine inlet 52 and the catheter 51.

[0050] Figure 4 A top view of the internal structure of the male catheterization operation training system provided in an embodiment of the present application (excluding the narrow dilatation catheter), wherein the cover plate 32 is placed in the opposite direction to the installation direction in actual use in order to clearly display the internal structure; Figure 5 An exploded view of the assembly of the male urinary catheterization operating system (excluding the narrow dilatation catheter) provided in an embodiment of the present application.

[0051] Specifically, in the embodiment of the present application, the shell 31 and the cover plate 32 are detachably fixedly connected by means of mutually cooperating screws and nuts or mutually cooperating buckles and slots.

[0052] Specifically, in an embodiment of the present application, the urethra simulation part 12 also includes an expansion channel 13 corresponding to the urethral stricture simulation part 2, the extension direction of the expansion channel 13 intersects with the extension direction of the tubular channel of the urethra simulation part 12, and forms opposite openings on the tube wall of the urethra simulation part 12.

[0053] Preferably, in the embodiment of the present application, the bladder simulation part includes a mirror-symmetrical first half cavity 111 and a second half cavity 112, the contact surface shapes of the first half cavity 111 and the second half cavity 112 are the same, and a complete hollow cavity 11 is formed after buckling; the urethra simulation part includes a mirror-symmetrical first semi-tubular channel 121 and a second semi-tubular channel 122, the contact surface shapes of the first semi-tubular channel 121 and the second semi-tubular channel 122 are the same, and a complete urethra simulation part 12 is formed after buckling, and the expansion channel 13 is automatically formed after the first semi-tubular channel 121 and the second semi-tubular channel 122 are buckled. Designing the bladder simulation part and the urethra simulation part as a split type can greatly reduce the complexity and cost of the mold, reduce the difficulty of production, and improve production efficiency.

[0054] Preferably, in the embodiment of the present application, the first half cavity 111 and the first half tubular passage 121 are integrally formed with the housing 31; the first half cavity 112 and the second half tubular passage 122 are integrally formed with the cover plate 32; and the fixing portion 23 is detachably fixedly mounted in the housing 31. By integrally forming the bladder simulation portion and the urethra simulation portion with the housing 31 and the cover plate 32, the production process and assembly flow are further simplified, and the subsequent installation and fixing are facilitated.

[0055] Preferably, the cover plate 32 is made of a transparent material. In the embodiment of the present application, the cover plate 32 can be made of a transparent material such as acrylic, plastic or tempered glass. Setting the cover plate 32 to be transparent allows for clear observation of the catheterization operation, facilitating evaluation of the operation training effect.

[0056] The following combination Figures 4 to 7 The specific implementation of the urethral stricture simulation part 2 of the embodiment of the present application is described in detail. Figure 6 This is a top view of the assembly of the urethral stricture simulation part 2 of the embodiment of the present application. Figure 7 It is an exploded view of the assembly of the telescopic portion 20 according to the embodiment of the present application.

[0057] Specifically, Figures 4 to 6 As shown, the urethral stricture simulation part 2 includes two telescopic parts 20 arranged opposite to each other on both sides of the urethral simulation part 12, and the telescopic part 20 includes a simulation head 21 whose shape imitates the protruding endometrial tissue of the urethral stricture part, a resettable damper 22 and a fixed part 23 for fixing the resettable damper 22.

[0058] like Figure 7 As shown, the resettable damper 22 includes a resettable piston rod 221 and a sleeve 222 covering the piston rod 221. The end of the piston rod 221 is fixedly connected to the simulation head 21, and can drive the simulation head 21 to reciprocate along the expansion channel 13 in a damping motion. The resettable damper 22 is fixedly installed inside the fixed part 23.

[0059] Specifically, in the specific implementation of the embodiment of the present application, the resettable damper 22 is a component that utilizes the viscosity of gas or liquid to achieve buffering and damping motion. The cylinder body in the sleeve 222 is sealed with gas or damping liquid and is provided with a component for resetting, such as a spring (not shown in the figure). One end of the piston rod 221 is placed in the sleeve 222 and connected to the reset component, and the other end is exposed from the sleeve 222. When the piston rod 22 is subjected to a compressive force, it performs a buffering and damping motion in the direction of the sleeve 222, and slowly resets under the action of the reset component when the compressive force disappears.

[0060] Furthermore, the axis of the expansion channel 13 is perpendicular to the axis of the urethra simulation part 12, the connecting line of the two telescopic parts 20 arranged on both sides of the urethra simulation part 12 is perpendicular to the axis of the urethra simulation part 12, and the movement direction of the resettable damper 22 is perpendicular to the axial direction of the urethra simulation part 12.

[0061] Furthermore, the distance between the two telescopic parts 20 arranged opposite to each other on both sides of the urethra simulation part is set so that when the resettable damper 22 is not subjected to a compressive force, the simulation head 21 is located in the expansion channel 13 .

[0062] The following combination Figures 4 to 6 as well as Figure 8 The specific implementation of the delayed reset control unit in the embodiment of the present application is described in detail. Figure 8 This is a connection block diagram of a delayed reset control unit according to an embodiment of the present application.

[0063] In the embodiments of the present application, Figure 8 As shown, the delayed reset control unit includes a control module 41, a power module 42, an expansion state detection module 43 and an expansion state maintaining module 44. The control module 41 and the power module 42 are packaged on a circuit substrate 40. The expansion state detection module 43 and the expansion state maintaining module 44 are electrically connected to the control module 41 respectively. The power module 42 is electrically connected to the control module 41 to supply power to the control module 41, and the expansion state detection module 43 and the expansion state maintaining module 44 are supplied power respectively through the control module 41.

[0064] In a specific implementation of the embodiment of the present application, the power module 42 may be a dry cell battery module or a rechargeable battery module with a charging port or a wireless charging module, and the circuit substrate 40 may be detachably fixedly installed in the housing 31 .

[0065] Furthermore, if Figures 4 to 6 As shown, the expansion state detection module 43 is fixedly arranged on the movement path of the simulation head 21, and the distance between the expansion state detection module 43 and the end of the simulation head 21 away from the urethra simulation part 12 is smaller than the maximum movement distance of the simulation head 21, so that when the simulation head 21 is subjected to compressive force and moves along the expansion channel 13, the end of the simulation head 21 away from the urethra simulation part 12 can touch the expansion state detection module 43.

[0066] Specifically, in the specific implementation method of the embodiment of the present application, the number of expansion state detection modules 43 can be one, which is used to detect the expansion state of any one simulation head 21, or two, which are used to simultaneously detect the expansion state of two simulation heads 21; the expansion state detection module 43 can be detachably fixed in the shell 31; the expansion state detection module 43 can be a collision sensor, such as a limit switch module with a limit block, which can sense the collision with the limit block; it can also be a pressure sensing module with a pressure probe, which can sense the pressure applied to the pressure probe and compare it with a preset value; it can also be other functional modules that can detect collision information.

[0067] Furthermore, if Figures 4 to 6 As shown, the expansion state maintaining module 44 includes a magnet 441 and a micro electromagnetic module 442. The magnet 441 is fixedly arranged at the end of the simulation head 21 away from the urethra simulation part 12, and the micro electromagnetic module 442 is fixedly arranged toward the magnet 441. The distance between the micro electromagnetic module 442 and the magnet 441 is set so that when the simulation head 21 is located at the position of touching the expansion detection module, the magnetic attraction force of the micro electromagnetic module 442 on the magnet 441 under the rated voltage state is greater than the restoring force of the resettable damper 22.

[0068] Specifically, in the specific implementation of the embodiment of the present application, the number of the expansion state maintaining modules 44 is two, corresponding to the two simulation heads 21 respectively; the micro electromagnetic module 442 is detachably fixedly mounted on the shell 31.

[0069] Furthermore, after the expansion state detection module 43 is touched by the simulation head 21, it sends a delayed trigger signal to the control module 41. After receiving the delayed trigger signal, the control module 41 supplies power to the micro electromagnetic module 442 with a preset voltage change waveform.

[0070] Specifically, the preset voltage change waveform is determined according to the recovery of the lining tissue of the urethral stricture after being compressed.

[0071] The following combination Figures 9 to 13 The workflow of the delayed reset control unit and the corresponding state changes of the urethral stricture simulation part 2 when the stricture dilatation type catheter 5 is used to perform the dilation operation on the urethral stricture simulation part 2 are described in detail.

[0072] Fig. 9This is a schematic diagram of an expandable urinary catheter being advanced to the urethral stricture simulation part 2 in an embodiment of the present application. When the expandable urinary catheter is not advanced to the urethral stricture simulation part 2, the two oppositely arranged simulation heads 21 are located in the expansion channel 13 to form a state simulating the male urethral stricture. When the expandable urinary catheter is advanced to the stricture simulation part 2, the outer diameter of the top of the head of the urinary catheter is greater than the distance between the two oppositely arranged simulation heads 21, and the resistance to the forward advancement can be clearly felt. The expansion part 542 of the expansion balloon 54 is in an unexpanded state at this time and extends into the gap between the simulation heads 21.

[0073] Fig.10 This is a schematic diagram of the expansion operation of the urethral stricture simulation part 2 in an embodiment of the present application. The expansion part 542 is inflated through the airway 543, so that the expansion part 542 expands, thereby applying a vertical compressive force to the simulation head 21. When the compressive force is greater than the restoring force of the resettable damper 22, the simulation head 21 is pushed out of the expansion channel 13 in a damping motion, and the end of the simulation head 21 away from the urethral simulation part 12 touches the expansion state detection module 43.

[0074] In a specific implementation of the embodiment of the present application, when the collision sensor serving as the expansion state detection module 43 senses that the simulation head 21 touches the limit block, it is determined to be touched and a delay trigger signal is sent to the control module 41 .

[0075] In another specific implementation of the embodiment of the present application, when the pressure sensor of the expansion state detection module 43 senses that the pressure applied by the simulation head 21 to the pressure sensing probe is greater than a preset value, it is determined to be touched and a delayed trigger signal is sent to the control module 41.

[0076] Furthermore, after receiving the delayed trigger signal, the control module 41 supplies power to the micro electromagnetic module 442 with a preset voltage variation waveform.

[0077] Specifically, the preset voltage change waveform is determined according to the recovery of the lining tissue of the urethral stricture after being compressed.

[0078] Fig.11 FIG. 4 shows a voltage variation waveform provided by a specific implementation of an embodiment of the present application, such as Fig.10As shown, within the time period of t < t1, the control module 41 supplies power to the micro electromagnetic module 442 at the rated voltage Un of the micro electromagnetic module 442. At this time, the magnetic attraction force of the micro electromagnetic module 442 on the magnet 441 is greater than the restoring force of the resetable damper 22, and the simulation head 21 remains stationary at the position where it collides with the expansion state detection module 43. After deflating the expansion balloon 54 at this time, the urethral stricture simulation part 2 still remains in the expanded state, so that the characteristic that the inner membrane tissue of the urethral stricture part remains in the expanded state for a period of time after being compressed and expanded can be truly simulated. At this time, the catheter can be smoothly advanced. Fig.12 The schematic diagram shows that the simulation head 21 still remains at the position where it collides with the expansion state detection module 43 after the expansion balloon 54 is released from expansion. When t > t1, the control module 41 stops supplying power to the micro electromagnetic module 442. At this time, the magnet 441 no longer receives the magnetic attraction force, and the simulation head 21 re-enters the expansion channel 13 under the action of the restoring force of the resetable damper 22 and simulates the urethral stricture state again.

[0079] Fig.13 The voltage change waveform provided by another specific implementation manner of the embodiment of the present application is shown. As Fig.12 shown, the rated voltage applied to the micro electromagnetic module 442 starts to slowly decrease and finally drops to 0 after remaining for a period of time. When t < t2, the power supply voltage of the control module 41 to the micro electromagnetic module 442 is greater than the critical voltage U2 (that is, the power supply voltage when the magnetic attraction force of the micro electromagnetic module 442 on the magnet 441 is equal to the restoring force of the resetable damper 22). The magnetic attraction force of the micro electromagnetic module 442 on the magnet 441 is greater than the restoring force of the resetable damper 22, and the simulation head 21 remains stationary. When t > t2, the power supply voltage of the control module 41 to the micro electromagnetic module 442 is less than the critical voltage U2, and the magnetic attraction force of the micro electromagnetic module 442 on the magnet 441 is less than the restoring force of the resetable damper 22. The simulation head 21 will gradually re-enter the expansion channel 13 under the combined action of the restoring force and the gradually decreasing magnetic attraction force and simulate the urethral stricture state again. By adjusting the descending speed of the voltage change waveform, the characteristic that the inner membrane tissue of the urethral stricture part remains in the expanded state and then gradually recovers after being compressed and expanded in different situations can be more accurately simulated.

[0080] A male urinary catheterization operation training system provided by an embodiment of the present application simulates the urethral stricture part through the oppositely arranged telescopic part 20. The resetable damper 22 can drive the simulation head 21 to reciprocate in a damped motion along the expansion channel 13 in a resetable manner, so that the force-bearing situation of the urethral stricture part during expansion can be more realistically simulated, enabling the trainees to feel the feeling of being blocked by the urethral stricture part during the catheter advancement during training;

[0081] By detecting the movement state of the urethral stricture simulation part 2 and controlling the delayed reset of the urethral stricture simulation part 2 through the delayed reset control unit, the characteristics of the inner membrane tissue of the urethral stricture that is compressed and expanded, maintaining the expanded state and then gradually recovering can be more accurately simulated, so that the operation training of the stricture dilatation type catheter is closer to the actual use, so that the trainees can quickly become familiar with the catheterization operation steps and operation points of the stricture dilatation type catheter, thereby improving the training effect.

[0082] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A male catheterization operation training system, used for training male catheterization operation using a narrow expansion type catheter, comprising a narrow expansion type catheter, a bladder simulation part, a urethra simulation part, a urethral stricture simulation part, a delayed reset control unit and a shell, wherein the narrow expansion type catheter comprises an expansion balloon located at the top of the catheter head, the bladder simulation part is a hollow cavity that imitates the shape of a bladder, the urethra simulation part is a hollow tubular channel that imitates the shape of a male urethra, one end of the urethra simulation part is connected to the bladder simulation part, and the other end is connected to an external space, the shell comprises a shell and a cover plate that are detachably connected, the shell is used to accommodate and fix the bladder simulation part, the urethra simulation part, the urethral stricture simulation part and the delayed reset control unit, and is characterized in that: The urethra simulation part further includes an expansion channel corresponding to the urethra stricture simulation part, and the expansion channel forms an opening on the tube wall of the urethra simulation part; The urethral stricture simulation part can be reset to simulate the movement state of the male urethral stricture part being expanded by the stricture expansion type catheter, and the delayed reset control unit detects the movement state and controls the delayed reset of the urethral stricture simulation part; The urethral stricture simulation part comprises two telescopic parts arranged opposite to each other on both sides of the urethral simulation part, the telescopic part comprises a simulation head of the inner membrane tissue whose shape imitates the protrusion of the urethral stricture part, a resettable damper and a fixing part; The resettable damper comprises a resettable piston rod and a sleeve covering the piston rod, the end of the piston rod is fixedly connected to the simulation head, and can drive the simulation head to resetably reciprocate along the expansion channel in a damping motion; The resettable damper is fixedly installed inside the fixing portion; The axis of the expansion channel is perpendicular to the axis of the urethra simulation part, the connecting line of the two telescopic parts arranged on both sides of the urethra simulation part is perpendicular to the axis of the urethra simulation part, and the movement direction of the resettable damper is perpendicular to the axis direction of the urethra simulation part; The delayed reset control unit includes a control module, a power module, an expansion state detection module and an expansion state maintaining module, wherein the control module and the power module are packaged on a circuit substrate, the power module is electrically connected to the control module, the control module is electrically connected to the expansion state detection module and the expansion state maintaining module respectively, and the power module supplies power to the expansion state detection module and the expansion state maintaining module respectively through the control module; The expansion state maintaining module includes a magnet and a micro electromagnetic module, the magnet is fixedly arranged at the end of the simulation head away from the urethra simulation part, and the micro electromagnetic module is fixedly arranged toward the magnet. The distance between the micro electromagnetic module and the magnet is set so that when the simulation head is located in a position touching the expansion state detection module, the magnetic attraction force of the micro electromagnetic module on the magnet under the rated voltage state is greater than the restoring force of the resettable damper.

2. A male catheterization operation training system as claimed in claim 1, characterized in that: The distance between the two telescopic parts arranged opposite to each other on both sides of the urethra simulation part is set as: When the resettable damper is not subjected to a compressive force, the dummy head is located within the expansion channel.

3. A male catheterization operation training system as claimed in claim 1, characterized in that: The expansion state detection module is fixedly arranged on the movement path of the simulation head, and the distance between the expansion state detection module and the end of the simulation head away from the urethra simulation part is less than the maximum movement distance of the simulation head.

4. A male urinary catheterization operation training system as claimed in claim 1, characterized in that: After the expansion state detection module is touched by the simulation head, the expansion state detection module sends a delayed trigger signal to the control module; After receiving the delayed trigger signal, the control module supplies power to the micro electromagnetic module with a preset voltage variation waveform.

5. A male urinary catheterization operation training system as claimed in claim 4, characterized in that: The preset voltage change waveform is determined according to the recovery of the urethral stricture endometrial tissue after being compressed.

6. A male urinary catheterization operation training system according to any one of claims 1 to 5, characterized in that: The bladder simulation part comprises a first half cavity and a second half cavity which are mirror-symmetrical, and the contact surfaces of the first half cavity and the second half cavity have the same shape, and after being buckled together, a complete bladder simulation part is formed; The urethra simulation part comprises a first semi-tubular channel and a second semi-tubular channel which are mirror-symmetrical, and the contact surfaces of the first semi-tubular channel and the second semi-tubular channel have the same shape, and after being buckled together, a complete urethra simulation part is formed; The first half cavity and the first half tubular passage are integrally formed with the shell; The second half cavity and the second half tubular channel are integrally formed with the cover plate; The fixing portion, the circuit substrate, the expansion state detection module and the micro electromagnetic module are detachably fixedly installed in the housing.

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