Teaching and training device capable of monitoring sheath placement resistance of flexible ureteroscope sheath in real time
By designing a force-measuring device that coordinates the inner and outer tubes during ureteroscopic sheath placement, the propulsion force of the sheath can be monitored and controlled in real time. This solves the problem of difficulty in monitoring the propulsion force during ureteral sheath placement, reduces the risk of ureteral injury, and improves surgical safety.
Patent Information
- Application Number
- CN202423307305.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During ureteral sheath placement, existing technologies struggle to monitor and control the insertion force in real time, potentially leading to ureteral injury, pain, instrument damage, and misoperation.
A force measuring device comprising an inner cylinder and an outer cylinder was designed. The sheath propulsion force is monitored in real time through an elastic element and a pressure sensor. The structure is simple and compact, and is convenient for surgical operation, thanks to the cooperation between the inner and outer cylinders.
This enables real-time monitoring and control of the sheath insertion force, reducing the risk of ureteral injury and improving surgical safety and efficiency.
Smart Images
Figure CN223871128U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of medical apparatus and instruments, especially to a teaching training device of ureteral access sheath. BACKGROUND
[0002] The development history of ureteral access sheath (UAS) can be traced back to the 1970s. Takayasu and Aso first described its use in 1974, which brought revolutionary changes to urological surgery. Since then, with the continuous progress of medical technology, the ureteral access sheath has undergone many improvements and innovations, and has gradually become an economical and efficient and safe and reliable surgical auxiliary tool. In recent years, with the wide application of laser lithotripsy and tumor ablation technology, the ureteral access sheath has become increasingly important in urological surgery. In China, the Second Affiliated Hospital of Dalian Medical University completed the development and application of ureteral access sheath in 2004, marking that China has made significant progress in this field.
[0003] The clinical use of ureteral access sheath has the following functional advantages: first, reducing intrarenal pressure, the use of ureteral access sheath can significantly reduce intrarenal pressure, avoid the backflow of renal pelvis veins and lymph due to high pressure during surgery, and thus protect renal function. Second, clear vision, by increasing the amount of liquid infusion, the ureteral access sheath can significantly improve the surgical field of view, allowing surgeons to see the target area more clearly and improve surgical precision. Third, reduce damage, the ureteral access sheath can isolate the soft mirror and the ureteral wall, reduce the damage of the mirror body to the ureteral wall, and protect the health of the ureter. Fourth, improve surgical efficiency, the ureteral access sheath allows surgeons to insert and remove the ureteral access sheath at will during surgery, use larger instruments for multiple biopsies or lithotripsy operations, thereby shortening the operation time and improving the operation efficiency.
[0004] Ureteral access sheaths are usually made of medical-grade PVC or silicone materials to ensure certain compressive strength and excellent biocompatibility. In design, individual differences in ureteral diameter of different patients need to be met, so various specifications of guide sheaths are provided, with a diameter range of about 2.6-3.2mm and a length of 12-18cm. The guide sheath is finely finished on the surface without burrs and scratches, and has good smoothness to reduce intubation resistance. Some advanced products also have the characteristics of anti-twist, strong extrusion resistance, X-ray opacity, etc. to meet the needs of complex operations. The placement of the ureteral access sheath requires the doctor to have skilled operation skills. During the operation, the doctor needs to guide the access sheath into the ureter with a guide wire and ensure that it advances in the correct direction. The successfully placed access sheath should be relatively fixed and not randomly in and out. If resistance is encountered, the direction needs to be adjusted or re-placed. A number of studies have shown that the use of ureteral access sheaths can significantly improve the success rate of surgery and reduce the incidence of complications. For example, in laser lithotripsy, the stone-free rate of patients using ureteral access sheaths is significantly higher than that of patients not using access sheaths. In addition, the use of access sheaths can also shorten the operation time, reduce patient pain and medical costs.
[0005] During the placement of the ureteral sheath, excessive pushing force can also cause damage to the ureter, including: 1. Tissue damage: excessive pushing force can cause damage to the ureter, bladder or ureter, causing bleeding, infection and other complications. 2. Pain and discomfort: excessive pushing force can cause pain and discomfort in patients, affecting the effectiveness of the operation and patient satisfaction. 3. Instrument damage: excessive pushing force can cause damage to the instrument, increasing the risk and cost of the operation. 4. Misoperation: excessive pushing force can cause the doctor to misoperate, affecting the effectiveness of the operation and the safety of the patient. Therefore, the placement of the ureteral sheath needs to be monitored and the pushing force needs to be detected in real time, and the placement of the sheath needs to be automatically unloaded according to the pushing force. Practical new type content
[0006] (1) Technical problem to be solved
[0007] The utility model provides a kind of teaching training device of real-time monitoring ureteral flexible mirror sheath sheath resistance, to solve how real-time monitoring problem of sheath pushing force in the process of ureteral sheath placement.
[0008] (2) Technical scheme
[0009] In order to achieve the above object, the utility model provides a kind of can real-time monitoring ureter flexible mirror sheath sheath resistance teaching training device, including channel sheath pipe and force measuring device.The force measuring device includes the inner cylinder and outer cylinder that are slidably sleeved together, the inner cylinder can be selectively locked on the channel sheath pipe and its end portion is fixedly provided with baffle, the inside of the outer cylinder is equipped with contact that can slide along its axial direction and elastic member that can be axially telescopic, two ends of the elastic member are connected with the outer cylinder and one end of the contact respectively, the other end of the contact is in contact with pressure sensor fixed in the inside of the baffle, the outer cylinder, the elastic member, the contact, the pressure sensor form the transmission path of force, and the pressure sensor is connected with display.
[0010] when the inner cylinder is locked on the channel sheath pipe, push the outer cylinder, the elastic member is compressed, and the elastic force inside the compressed elastic member is transmitted to the pressure sensor through contact for measurement to obtain sheath advancing force.
[0011] Further technical solutions are that when the inner cylinder is locked on the channel sheath pipe, stop pushing and release the outer cylinder, the elastic member gradually restores to original length, and the outer cylinder is pushed back to the initial position. When the inner cylinder is not locked on the channel sheath pipe, the inner cylinder can slide on the channel sheath pipe. Push the outer cylinder, and the force acting on the outer cylinder will be transmitted to the inner cylinder through the elastic member, the contact, the pressure sensor and the baffle in turn, and drive the inner cylinder to slide along the channel sheath pipe.
[0012] Further technical solutions are that the inner side of the outer cylinder is provided with a guide groove, and the contact can move axially in the guide groove, and the contact is connected with the elastic member.
[0013] Further technical solutions are that, along the radial direction of the inner cylinder, a key assembly is slidably arranged on the inner cylinder and located between the inner cylinder and the outer cylinder. When the key assembly is in the depressed state, the inner cylinder of the force measuring device is locked on the channel sheath pipe, and when the key assembly is in the released state, the force measuring device can freely slide on the channel sheath pipe.
[0014] The further technical scheme is characterized in that the key assembly comprises a key and a spring. The outer side of the inner cylinder is provided with a first sliding groove along the axial direction, and a sliding block is slidably arranged in the first sliding groove. The inner side of the outer cylinder is provided with a sliding push plate corresponding to the first sliding groove, and the sliding push plate can push the sliding block to slide in the first sliding groove. The bottom of the key is provided with a key leg, the key leg is peripherally provided with the spring, the key leg is inserted into a guide hole arranged at the bottom of the first sliding groove, and when the key is pressed down, the key leg can abut against the outer surface of the channel sheath along the guide hole.
[0015] The further technical scheme is characterized in that the key assembly further comprises a Z-shaped shaft, one end of the Z-shaped shaft is an upper sleeve, and the other end is a lower sliding rod. A long shaft is arranged between the two key legs, the upper sleeve is rotatably sleeved on the long shaft, and the two ends of the upper sleeve are limited in the axial movement by a limiting sleeve arranged on the long shaft. A second sliding groove is arranged on the sliding block, and the lower sliding rod is inserted into the second sliding groove and can slide in the second sliding groove. When the key is pressed down, the lower sliding rod corresponds to a locking position in the second sliding groove, and when the key is released, the lower sliding rod corresponds to a release position in the second sliding groove.
[0016] The further technical scheme is characterized in that two through holes are arranged side by side on the sliding block along a direction perpendicular to the sliding direction of the sliding block, two groups of through slots are arranged on the side wall of the first sliding groove corresponding to the through holes, and two shafts pass through the through slots and the through holes respectively. The front end of the sliding push plate is provided with a fixed position, and the fixed position clamps the two ends of the shaft protruding out of the through slots. The second sliding groove comprises a reset notch, and when the sliding block slides to a set displacement along the through slots, the lower sliding rod moves along the reset notch from the locking position to the release position in the second sliding groove.
[0017] The further technical scheme is characterized in that a limiting sliding groove is arranged on the key, the rear end of the sliding push plate extends upwardly to have a connecting part, and the connecting part is connected with the outer cylinder and can slide in the limiting sliding groove.
[0018] The further technical scheme is characterized in that the baffle comprises a first baffle and a second baffle, the first baffle and the second baffle are respectively fixed at the two ends of the inner cylinder and are positioned by a positioning shaft shoulder arranged at the end of the inner cylinder, and the pressure sensor is arranged on the inner side of the first baffle.
[0019] The further technical scheme is characterized in that a connecting shaft is arranged between the first baffle and the second baffle, the inner side of the outer cylinder is provided with a connecting sleeve matched with the connecting shaft, so that the outer cylinder can move along the direction of the connecting shaft.
[0020] (III) Beneficial effects
[0021] The scheme provided by the utility model improves the original ureteral flexible mirror sheath, and adds a force measuring device capable of real-time detection of sheath placement force. Although the existing coating technology and material improvement have reduced the damage to the ureter during sheath placement, excessive pushing force may still cause damage. The force measuring device can convert the pushing force of the sheath placement into the pressure of the outer cylinder on the pressure sensor, facilitating measurement, thereby helping the operator to understand and control the force applied to the channel sheath tube in real time during the operation, effectively reducing the risk of ureteral injury caused by excessive pushing force. The force measuring device is designed by the cooperation of the inner and outer cylinders, and has simple and compact overall structure, facilitating the operation of the operator. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is a general assembly schematic view of the teaching training device for real-time monitoring of ureteral flexible mirror sheath placement resistance;
[0023] Figure 2 It is a three-dimensional exploded structure schematic view of the force measuring device;
[0024] Figure 3 It is a three-dimensional structure schematic view of the outer cylinder;
[0025] Figure 4 It is a three-dimensional structure schematic view of the inner cylinder;
[0026] Figure 5 It is a three-dimensional structure schematic view of the key assembly and the slider connection;
[0027] Figure 6 It is a structure schematic view of the slider;
[0028] Figure 7 It is a movement schematic view of the lower slide rod in the second sliding groove of the slider.
[0029]
BRIEF DESCRIPTION OF DRAWINGS
[0030] 1: channel sheath tube; 2: force measuring device; 21: inner cylinder; 211: first sliding groove; 2111: guide hole; 2112: opposite slot; 212: positioning shaft shoulder; 22: outer cylinder; 221: guide groove; 222: sliding push plate; 2221: fixed position; 2222: connecting part; 223: connecting sleeve; 3: key assembly; 31: key; 311: key leg; 312: limiting sliding groove; 32: spring; 33: Z-shaped shaft; 331: upper sleeve; 332: lower slide rod; 34: long shaft; 35: limiting sleeve; 4: baffle; 41: first baffle; 42: second baffle; 5: contact; 6: elastic member; 7: pressure sensor; 8: slider; 81: second sliding groove; 811: reset notch; 82: through hole; 9: mandrel; 10: connecting shaft. Detailed Implementation
[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] This embodiment provides a teaching and training device that can monitor the resistance during ureteroscopic sheath placement in real time, such as... Figure 1 As shown, it includes a channel sheath 1 and a force measuring device 2.
[0033] For details, please refer to Figure 2 As shown, the force measuring device 2 includes an inner cylinder 21 and an outer cylinder 22 that are slidably fitted together. The inner cylinder 21 can be selectively locked onto the channel sheath 1 and a baffle 4 is fixedly provided at its end. The outer cylinder 22 has a contact 5 that can slide along its axial direction and an elastic element 6 that can extend and retract along its axial direction. The two ends of the elastic element 6 are respectively connected to one end of the outer cylinder 22 and one end of the contact 5. The other end of the contact 5 is in contact with a pressure sensor 7 fixed inside the baffle 4. The outer cylinder 22, the elastic element 6, the contact 5, and the pressure sensor 7 form a force transmission path. The pressure sensor 7 is connected to a display.
[0034] When the inner cylinder 21 is locked onto the channel sheath 1, the outer cylinder 22 is pushed, and the elastic element 6 is compressed. The elastic force inside the compressed elastic element 6 is transmitted through the contact 5 to the pressure sensor 7 for measurement, which yields the sheath-mounting propulsion force. When the pushing stops and the outer cylinder 22 is released, the elastic element 6 gradually returns to its original length, pushing the outer cylinder 22 back to its initial position.
[0035] When the inner cylinder 21 is not locked onto the channel sheath 1, it can slide along the channel sheath 1. Pushing the outer cylinder 22 transmits the force acting on it sequentially through the elastic element 6, contact 5, pressure sensor 7, and baffle 4 to the inner cylinder 21, causing it to slide along the channel sheath 1. It should be noted that pushing the outer cylinder 22 when the inner cylinder 21 is not locked is essentially a misoperation. In this case, the force on the elastic element 6 is only enough to overcome the frictional force between the inner cylinder 21 and the channel sheath 1. This frictional force is very small, so the elastic element 6 is essentially not compressed and there is no possibility of it resetting.
[0036] To further explain, the baffle 4 has a central opening and is fitted onto the outside of the inner cylinder 21. The baffle 4 must ensure that it does not impede the free movement of the inner cylinder 21 on the channel sheath 1. The elastic element 6 here can be a spring, but is not limited to a spring, or other elastic components. In this embodiment, there are three guide grooves 221 and three contacts 5, which ensures the stability of the structure and reduces the measurement error of the pressure sensor 7.
[0037] The technical scheme has the following technical effects: the original ureteral access sheath is improved, and a force measuring device 2 capable of real-time detection of the sheath placement pushing force is added. The force measuring device 2 can convert the sheath placement pushing force into the pressure of the outer cylinder 22 on the pressure sensor 7, facilitating measurement, thereby helping the operator to understand and control the force applied to the access sheath tube 1 in real time during the operation, effectively reducing the risk of ureteral injury caused by excessive pushing force. The force measuring device 2 is designed by the cooperation of the inner and outer cylinders, and has a simple and compact overall structure, which is convenient for the operator to operate.
[0038] In this embodiment, the inner side of the outer cylinder 22 is provided with a guide groove 221, and a contact 5 capable of moving in the axial direction of the guide groove 221 is arranged inside the guide groove 221, and is connected with the contact 5 through an elastic element 6.
[0039] In this embodiment, the key assembly 3 is arranged on the inner cylinder 21 in the radial direction of the inner cylinder 21 and is located between the inner cylinder 21 and the outer cylinder 22. Further, when the key assembly 3 is in a pressed state, the inner cylinder 21 of the force measuring device 2 is locked on the access sheath tube 1, and when the key assembly 3 is in a released state, the force measuring device 2 can freely slide on the access sheath tube 1. The key assembly 3 is used to control the sheath placement process, which is convenient for the operator to operate.
[0040] Specifically, referring to Figure 3-5 , the key assembly 3 includes a key 31 and a spring 32. The outer side of the inner cylinder 21 is provided with a first sliding groove 211 in the axial direction, and a sliding block 8 is arranged in the first sliding groove 211. The inner side of the outer cylinder 22 is provided with a sliding push plate 222 corresponding to the first sliding groove 211, and the sliding push plate 222 can push the sliding block 8 to slide in the first sliding groove 211. The bottom of the key 31 has a key leg 311, and the spring 32 is arranged around the key leg 311. The key leg 311 is inserted into a guide hole 2111 arranged at the bottom of the first sliding groove 211, and when the key 31 is pressed, the key leg 311 can abut against the outer surface of the access sheath tube 1 along the guide hole 2111. The main function of the guide hole 2111 is to prevent the key 31 from deviating during pressing.
[0041] Further, in this embodiment, the key assembly 3 further includes a Z-shaped shaft 33, one end of the Z-shaped shaft 33 is an upper sleeve 331, and the other end is a lower sliding rod 332. A long shaft 34 is arranged between the two key legs 311, the upper sleeve 331 is rotatably sleeved on the long shaft 34, and the two ends of the upper sleeve 331 are limited in axial movement by a limiting sleeve 35 arranged on the long shaft 34, and Figure 6As shown, the slider 8 is provided with a second sliding groove 81, and the lower slide rod 332 is inserted into the second sliding groove 81 and can slide in the second sliding groove 81. When the button 31 is pressed, the lower slide rod 332 corresponds to the locking position in the second sliding groove 81, and when the button 31 is released, the lower slide rod 332 corresponds to the release position in the second sliding groove 81.
[0042] It should be noted here that since the Z-shaped shaft 33 is on the long shaft 34, the radial movement of the long shaft 34 can only move together with the button 31, the Z-shaped shaft 33 can make a circular motion on the long shaft 34, and the long shaft 34 will limit the position of the spring 32.
[0043] Specifically, in the embodiment, two through holes 82 are provided on the slider 8 in a direction perpendicular to the sliding direction of the slider 8, and corresponding to the through holes 82, two groups of through slots 2112 are provided on the side wall of the first sliding groove 211, and the two shafts 9 pass through the through slots 2112 and the through holes 82 respectively. The front end of the sliding push plate 222 is provided with a fixed position 2221, and the fixed position 2221 clamps the two ends of the shaft 9 protruding from the through slots 2112. The second sliding groove 81 includes a reset gap 811, and when the slider 8 slides along the through slots 2112 to a set displacement, the lower slide rod 332 will move along the reset gap 811 from the locking position of the second sliding groove 81 to the release position.
[0044] It should be noted here that the upper end of the reset gap 811 is the release position, and the lower end is the locking position. The depth of the second sliding groove 81 is greater than the depth of the reset gap 811, and there is a depth difference between the two. In this way, when the slider 8 slides forward, when the displacement between the inner cylinder 21 and the outer cylinder 22 reaches the depth difference, the lower slide rod 332 will directly move from the locking position of the second sliding groove 81 to the release position.
[0045] The specific process is described in detail with reference to Figure 7When the button 31 is pressed for the first time, the movement of the lower slide rod 332 in the second sliding groove 81 is: ①→②→③, and then when the button 31 is released, the movement of the lower slide rod 332 is: ③→④; when the button 31 is pressed and released for the first time, the button leg 311 will be in direct contact with the channel sheath 1 through the guide hole 2111 of the inner cylinder 21, and the contact surface between the button leg 311 and the channel sheath 1 is specially treated to increase the friction between them. The movement of the button leg 311 is limited by the sliding block 8, and the pressure applied makes the friction between the button leg 311 and the channel sheath 1 much greater than the propelling force applied by the user when placing the sheath. At this time, the force measuring device 2 is locked on the channel sheath; when the button 31 is pressed for the second time, the movement of the lower slide rod 332 is: ④→⑤, and when the button 31 is released, the movement of the lower slide rod 332 is: ⑤→⑥→①; when the button 31 is pressed for the second time, the button 31 will be at a lowest point, and when the button 31 is released, the spring 32 will give the button 31 a spring force to return it to the initial point. The button leg 311 does not contact the channel sheath 1, and the force measuring device 2 is released. When the button moves, the Z-shaped shaft 33 moves together, and the lower slide rod 332 of the Z-shaped shaft 33 moves periodically in the second sliding groove 81 of the sliding block 8.
[0046] Specifically, in the present embodiment, a limiting sliding groove 312 is arranged on the button 31, and the rear end of the sliding push plate 222 extends upwardly to have a connecting portion 2222 connected with the outer cylinder 22 and capable of sliding in the limiting sliding groove 312.
[0047] Specifically, in the present embodiment, the baffle 4 includes a first baffle 41 and a second baffle 42, which are respectively fixed at the two ends of the inner cylinder 21 and positioned by the positioning shaft shoulder 212 arranged at the end of the inner cylinder 21, and the pressure sensor 7 is arranged on the inner side of the first baffle 41. The number of the pressure sensors 7 is the same as that of the contacts 5, which is three. Also, in order to ensure stability and reduce measurement error.
[0048] Specifically, in the present embodiment, a connecting shaft 10 is arranged between the first baffle 41 and the second baffle 42, and the inner side of the outer cylinder 22 has a connecting sleeve 223 matched with the connecting shaft 10, so that the outer cylinder 22 can move along the direction of the connecting shaft 10.
[0049] Further, the second baffle 42 has two counterbores, the positions of which correspond to those of the two connecting shafts 10, and the second baffle 42 is connected with the connecting shaft 10 by screws. The first baffle 41 has three recesses, each of which has one pressure sensor 7.
[0050] In summary, the specific use process of the ureteral access sheath capable of measuring the placing sheath propelling force is as follows:
[0051] During the use of the operator, first, the channel sheath 1 is inserted into the inner cylinder 21, when the channel sheath 1 needs to be pushed forward, the button 31 is pressed, the button leg 311 presses the channel sheath 1, the sheath is placed by the hand-held outer cylinder 22, the relative displacement between the outer cylinder 22 and the inner cylinder 21 occurs, the elastic element 6 is compressed, the sheath placing pushing force is transmitted to the contact 5 through the elastic element 6, and then further transmitted to the pressure sensor 7, and then displayed on the display, the operator changes the pushing force during sheath placement according to the real-time displayed pressure data, so as to avoid injury to the personnel. Since the shaft 9 passing through the sliding block 8 is fixed at the fixed position 2221 at both ends, the sliding block 8 moves together with the outer cylinder 22, during the sheath placement, the lower slide bar 332 is at the No. 4 position of the second sliding groove 81, when the sheath placing pushing force is greater than the specified pushing force, the specified pushing force is set to 8N in advance, the displacement of the outer cylinder 22 pushing the sliding block 8 to move forward is large, the movement track of the lower slide bar 332 in the second sliding groove 81 is: 4→1, and the corresponding button 31 is reset, so that the user can avoid applying excessive pushing force to the patient.
[0052] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.
[0053] In addition, the descriptions such as "first", "second" and the like in the embodiments are only for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the embodiments, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0054] In the embodiments, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.
[0055] It should be understood that the above description of the specific embodiments of the present application is only for the purpose of illustrating the technical route and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, but the present application is not limited to the above specific implementation. Any changes or modifications made within the scope of the claims of the present application shall be covered within the scope of protection of the present application.
Claims
1. A teaching and training device capable of real-time monitoring of the resistance during placement of a ureteroscope sheath, characterized in that, It includes a channel sheath (1) and a force measuring device (2); The force measuring device (2) includes an inner cylinder (21) and an outer cylinder (22) that are slidably sleeved together. The inner cylinder (21) can be selectively locked onto the channel sheath (1) and a baffle (4) is fixedly provided at its end. The outer cylinder (22) has a contact (5) that can slide along its axial direction and an elastic element (6) that can extend and retract along its axial direction. The two ends of the elastic element (6) are respectively connected to one end of the outer cylinder (22) and one end of the contact (5). The other end of the contact (5) is in contact with a pressure sensor (7) fixed inside the baffle (4). The outer cylinder (22), the elastic element (6), the contact (5), and the pressure sensor (7) form a force transmission path. The pressure sensor (7) is connected to a display. When the inner cylinder (21) is locked on the channel sheath (1), the outer cylinder (22) is pushed, and the elastic element (6) is compressed. The elastic force inside the compressed elastic element (6) is transmitted through the contact (5) to the pressure sensor (7) for measurement to obtain the sheath propulsion force.
2. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 1, characterized in that, When the inner cylinder (21) is locked on the channel sheath (1), the pushing is stopped and the outer cylinder (22) is released. The elastic element (6) gradually returns to its original length and pushes the outer cylinder (22) back to its initial position. When the inner cylinder (21) is not locked onto the channel sheath (1), the inner cylinder (21) can slide on the channel sheath (1); Pushing the outer cylinder (22) will cause the force acting on the outer cylinder (22) to be transmitted to the inner cylinder (21) in sequence through the elastic element (6), the contact (5), the pressure sensor (7), and the baffle (4), and will cause the inner cylinder (21) to slide along the channel sheath (1).
3. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 1, characterized in that, The inner side of the outer cylinder (22) is provided with a guide groove (221), and the guide groove (221) is provided with a contact (5) that can move along its axial direction, and is connected to the contact (5) through the elastic member (6).
4. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 1, characterized in that, Along the radial direction of the inner cylinder (21), a button assembly (3) is slidably disposed on the inner cylinder (21) and the button assembly (3) is located between the inner cylinder (21) and the outer cylinder (22); When the button assembly (3) is in the pressed state, the inner cylinder (21) of the force measuring device (2) is locked on the channel sheath (1). When the button assembly (3) is in the released state, the force measuring device (2) can slide freely on the channel sheath (1).
5. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 4, characterized in that, The button assembly (3) includes a button (31) and a spring (32); The outer side of the inner cylinder (21) is provided with a first groove (211) along its axial direction, and a slider (8) is slidably disposed in the first groove (211). The inner side of the outer cylinder (22) is provided with a sliding push plate (222) corresponding to the first groove (211). The sliding push plate (222) can push the slider (8) to slide in the first groove (211). The bottom of the button (31) has a button support (311), and the spring (32) is arranged around the button support (311). The button support (311) is inserted into the guide hole (2111) provided at the bottom of the first slide groove (211). When the button (31) is pressed down, the button support (311) can abut against the outer surface of the channel sheath (1) along the guide hole (2111).
6. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 5, characterized in that, The button assembly (3) also includes a Z-shaped shaft (33), one end of which is an upper sleeve (331) and the other end is a sliding rod (332); A long shaft (34) is provided between the two button feet (311). The upper sleeve (331) is rotatably sleeved on the long shaft (34). The two ends of the upper sleeve (331) are restricted from axial movement by limiting sleeves (35) provided on the long shaft (34). The slider (8) is provided with a second slide groove (81). The lower slide rod (332) is inserted into the second slide groove (81) and can slide in the second slide groove (81). When the button (31) is pressed down, the sliding rod (332) corresponds to the locking position in the second slide groove (81); when the button (31) is released, the sliding rod (332) corresponds to the releasing position in the second slide groove (81).
7. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 6, characterized in that, Along a direction perpendicular to the sliding direction of the slider (8), two through holes (82) are opened side by side on the slider (8). Corresponding to the through holes (82), two sets of through slots (2112) are opened on the side wall of the first groove (211). Two spindles (9) pass through the through slots (2112) and the through holes (82) respectively. The front end of the sliding push plate (222) is provided with a fixing position (2221), which engages the two ends of the mandrel (9) that protrude from the through slot (2112); The second slide (81) includes a reset notch (811) when the slider (8) slides along the through slot (2112) to a set displacement, the sliding rod (332) will move along the reset notch (811) from the locked position to the released position of the second slide (81).
8. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 7, characterized in that, The button (31) is provided with a limiting groove (312), and the rear end of the sliding push plate (222) extends upward with a connecting part (2222). The connecting part (2222) is connected to the outer cylinder (22) and can slide in the limiting groove (312).
9. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 1, characterized in that, The baffle (4) includes a first baffle (41) and a second baffle (42). The first baffle (41) and the second baffle (42) are respectively fixed at both ends of the inner cylinder (21) and positioned by a positioning shoulder (212) provided at the end of the inner cylinder (21). The pressure sensor (7) is located on the inner side of the first baffle (41).
10. The teaching and training device for real-time monitoring of the resistance to placement of the ureteroscope sheath as described in claim 9, characterized in that, A connecting shaft (10) is provided between the first baffle (41) and the second baffle (42). The inner side of the outer cylinder (22) has a connecting sleeve (223) that cooperates with the connecting shaft (10), so that the outer cylinder (22) can move along the direction of the connecting shaft (10).