Total-factor surgery simulation visual sewing and knotting practice platform

Abstract

The utility model discloses a total-factor surgery simulation visual suturing and knotting practice platform. The device comprises an operation table and a control table which highly simulate human tissues, the operating table comprises a simulated human tissue suturing model of which the two sides of an incision are respectively provided with a resistance strain sensor, a simulated blood vessel suturing and knotting model arranged in a blood vessel layer, and a blood pumping device communicated with the simulated human tissue suturing model through a catheter; the blood pumping device simulates the flow velocity and pressure of blood flowing in the liquid supplementing tank centrifugal pump and the simulated blood vessel suture knotting model through a liquid guide pipe; annular pressure sensors for detecting the tension of the blood vessel walls on the two sides during suturing are mounted in interlayers of the inner wall and the outer wall on the two sides of the incision of the sutured blood vessel in an embedded manner, and first annular resistance strain sensors for reflecting the knotting pressure of the blood vessel are mounted on the inner wall of the incision of the sutured blood vessel; a second annular resistance strain type sensor used for detecting the blood vessel ligation pressure value is arranged in an interlayer of the inner wall and the outer wall of the ligation blood vessel.

Description

Technical Field

[0001] The utility model relates to the field of medical training, in particular to a suturing and knotting training model, and in particular to a full-element surgical simulation visualized suturing and knotting training platform. Background Art

[0002] Suturing and ligating is one of the skills that medical students must practice. When conducting professional skills training, medical schools must strictly practice surgical knotting and hemostasis skills with high requirements and standards. Therefore, standardized practice models are indispensable. However, in the operation and teaching of vascular ligation and suturing, due to the many steps and high difficulty of the operation, students need to use models to know whether the knot is loose and thus invalid knotting during the practice. However, there is a relative lack of medical teaching aids for simulating deep knotting operations, and the existing skill training equipment has a single function and poor experience.

[0003] For example, the existing Chinese patent CN109949639A discloses a deep surgical knotting skill training device, which can vividly simulate the deep arteriolar jet bleeding scene, and the ejected blood can automatically flow back for use, but the device is not comprehensive enough, and only operates and monitors the blood vessels, which is not realistic enough. Moreover, the device design through blood flow has a good effect when it is first used, but the effect of repeated use is not good, and it is easily affected by the previous use. Chinese patent CN206931284U discloses a human blood vessel knotting model using a tension contact switch. When the model is in use, the suture is used to tie a knot on the simulated blood vessel, and a tension is generated on the simulated blood vessel. Under the action of the tension, the switch compression spring is deformed during the sliding process of the conductive sleeve, and the conductive sleeve slides to contact the contact component, so that the power supply, alarm component and tension contact switch form an electrical circuit, and the tension contact switch is turned on. It can warn the medical staff of the knotting strength, and can remind the medical staff through the electronic alarm controller whether the knotting strength is too strong or too weak, which can improve the accuracy of the knotting strength and the knotting quality of the medical staff. However, the model does not simulate the water flow to detect the suture density technology, the structural design and level are single, the simulation design of human tissue is insufficient, and the comprehensiveness is poor.

[0004] Therefore, it can be seen that the existing deep knotting teaching device cannot accurately measure and feedback the operator's pulling force and displacement distance in real time. There are problems such as insufficient simulation, single model structure and function, and failure to meet specific training and assessment needs. Students use this type of model to practice ligation and suturing skills on a daily basis, but the simulation is too poor, resulting in many problems in clinical operation.

[0005] Therefore, based on the fact that the existing deep knotting teaching devices cannot fully meet the needs of cultivating medical talents in the new era, the utility model has developed a full-element surgical simulation visualization suturing and knotting practice platform. Through this device, a highly simulated knotting training model with clear structural hierarchy, replaceable component design, different damage conditions, and multiple practice (or assessment) modes is provided for medical students. Summary of the invention

[0006] To achieve the above-mentioned purpose, the utility model provides a full-element surgical simulation visualized suturing and knotting training platform, which performs suturing and knotting training by highly simulating human tissue, and is used for daily training and assessment of medical students.

[0007] The specific technical features are as follows:

[0008] A full-element surgical simulation visualized suturing and knotting training platform, comprising an operating table and a control console (10), wherein the operating table comprises a simulated human tissue suturing model, a simulated blood vessel suturing and knotting model, and a blood pumping device (6);

[0009] The simulated human tissue suturing model comprises: a simulated skin layer (1), a subcutaneous connective tissue layer (2), a fascia layer (3) and a muscle layer (4), with a resistive strain sensor (11) placed on both sides of the incision (X) of each layer of simulated human tissue respectively; and a blood vessel layer (5) is also arranged at the innermost part;

[0010] The simulated blood vessel suturing and knotting model is wrapped in a blood vessel layer (5), and comprises a suturing blood vessel (51) for suturing training and a ligating blood vessel (52) for knotting training;

[0011] The blood pumping device (6) comprises a fluid infusion tank (61) and a centrifugal pump (7) connected via a fluid conduit (9); the blood pumping device (6) is connected to a simulated blood vessel suturing and knotting model via the fluid conduit (9);

[0012] The fixing device is nested between the simulated skin layer (1) and the muscle layer (4) of the simulated human tissue suturing model, and auxiliary fixing slots are provided on both the left and right sides;

[0013] The control console (10) comprises a control display system and an alarm system. The control display system comprises a main switch, a mode selection button, a display screen, and a power-on wire and a data transmission line for transmitting signals. The alarm system comprises a warning light (101).

[0014] Furthermore, the sutured blood vessel (51) is provided with a suture opening, and a first annular pressure sensor (511) and a second annular pressure sensor (512) are embedded in the inner and outer wall interlayers of the blood vessel on both sides of the suture opening. The sensors detect the tension of the blood vessel wall and transmit it to the control display system of the console (10) through a data transmission line.

[0015] Furthermore, a first annular resistance strain sensor (513) is also arranged on the inner wall of the sutured blood vessel (51), and the knotting pressure detected by the sensor is transmitted to the control and display system via a data transmission line.

[0016] Furthermore, a second annular resistance strain sensor (521) for detecting the ligation pressure of the blood vessel (52) is provided between the inner and outer walls of the ligated blood vessel (52), and the ligation pressure detected by the sensor is transmitted to the control and display system via a data transmission line.

[0017] Furthermore, a "W"-shaped recovery groove (8) is provided below the training position of the suture blood vessel (51) and the ligation blood vessel (52) for collecting liquid exuded when the suture is improper or the knot is ineffective; the first recovery groove (81) and the second recovery groove (82) are respectively located below the suture blood vessel (51) and the second recovery groove (82). The first recovery groove (81) is located below the suture blood vessel (51) and the second recovery groove (82) is located below the ligation blood vessel (52).

[0018] Furthermore, the recovery tank (8) is provided with an outflow port, the outflow port is located at the lowest point of the first recovery tank (81) and the second recovery tank (82), and the outflow port is connected to the liquid replenishment tank via a pipeline.

[0019] Furthermore, an ultrasonic liquid level sensor (62) for detecting the liquid level is arranged in the liquid replenishing tank (61).

[0020] Furthermore, the simulated blood vessel suturing and knotting model wrapped in the blood vessel layer (5) is a replaceable device, and the blood vessel is connected to the catheter (9) via a joint.

[0021] Furthermore, the warning light (101) is connected to the control display system signal to remind the operator in real time where the operation is not in compliance with the regulations.

[0022] The working principle of the utility model is introduced as follows: a full-element surgical simulation visualized suturing and knotting training platform comprises an operating table and a control console (10). A variety of training models are arranged on the operating table, and the models can be selected by starting a switch on the control console (10).

[0023] Before use, various training modes are first entered into the console (10) to meet different needs in different scenarios. The operator can select different modes for ligation, suturing and knotting exercises simply by pressing the control button. At the same time, the flow rate and flow rate of the intravascular fluid are controlled by adjusting the power and other parameters of the blood pumping device (6) through the console (10) to simulate different blood vessels (such as arteries / veins, femoral / abdominal aorta / radial arteries...) for suturing and knotting, and strive to simulate the most realistic training environment. And by achieving real-time monitoring and feedback of various operations, judging, prompting and recording various indicators according to the set standard reference values, the user's operation is subjected to detailed and comprehensive quantitative training and assessment.

[0024] Calibration Mode:

[0025] In order to avoid unexpected damage to the tight connection of the blood vessels or the blood vessels themselves due to quality problems, the device will start the calibration mode after the assembly and connection of the device is completed. Once unexpected liquid leakage or abnormal mechanical feedback occurs, the device alarm will flash. After checking and eliminating the abnormal situation, it is necessary to calibrate again before entering the practice / assessment mode.

[0026] The specific practice / assessment mode is as follows:

[0027] (1) Tissue suturing practice / assessment mode:

[0028] In the console (10), the initial value of the first operation is read and set as a reference value 1; the console collects the change of the tension value of the resistance strain sensor in the tissue in real time and integrates the information for real-time feedback.

[0029] (2) Blood vessel ligation practice / assessment mode: The pressure value of the annular pressure sensor when there is no external force is set to 0 in the control console (10), and the initial value of the first operation is read and set as the reference value 1. The control console (10) collects the pressure value changes of the annular pressure sensor in the ligated blood vessel (52) in real time and integrates the information for real-time feedback.

[0030] (3) Blood vessel suturing practice / assessment mode: The initial value of the first operation is read in the console (10) and set as a reference value 1. The console (10) collects the change of the tension value of the annular resistance strain sensor (11) in the sutured blood vessel (51) in real time and integrates the information for real-time feedback. After the operation is completed, the blood pumping device (6) starts to operate to simulate blood reperfusion, and judges whether the suturing effect meets the requirements by whether there is exudate and pressure changes.

[0031] The console (10) is connected to the sensors of various parts of the full-element surgical simulation visual suturing and knotting training platform through wires to receive the electrical signals generated by the sensors in real time and integrate the information for real-time display through a display screen. When the operation is improper, the warning light (101) flashes and records and analyzes, and the areas where the operation needs to be improved can be analyzed and displayed by timing and quantitative results.

[0032] Compared with the prior art, the beneficial effects of the utility model are: the device has a clear structural hierarchy, a maximum simulation structure design, a replaceable component design, and different damage conditions, a variety of practice (or assessment) modes, with strong comprehensiveness, reusability, authenticity, flexibility, and great advantages in corresponding functions and costs. At the same time, because of the use of sensor technology, it has high sensitivity, moderate price, strong stability and reliability, is not easy to damage, and has a certain degree of adjustment advantage. In addition, the design has real-time monitoring, alarm and data recording, analysis, and transmission modules, which can provide real-time prompts for operating errors during training, and record and analyze the situation of the operator (or assessor), which can provide great help to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0034] Figure 2 It is a top view of the utility model;

[0035] Figure 3 It is a vertical cross-sectional view of the utility model;

[0036] Figure 4 It is a vertical cross-sectional view of the simulated blood vessel suturing and knotting model of the utility model;

[0037] Figure 5 It is a cross-sectional view of the utility model;

[0038] Figure 6 This is a schematic diagram of the sutured blood vessel structure of the utility model;

[0039] Figure 7 It is a connecting and fixing device for each model layer of the utility model.

[0040] In the figure, 1-simulated skin layer; 11-resistance strain sensor; 2-subcutaneous connective tissue layer; 3-fascia layer; 4-muscle layer; 5-blood vessel layer; 51-sutured blood vessels; 511-No. 1 annular pressure sensor; 512-No. 2 annular pressure sensor; 513-first annular resistance strain sensor; 52-ligated blood vessels; 521-second annular resistance strain sensor; 6-blood pumping device; 61-fluid replenishing tank; 62-ultrasonic liquid level sensor; 7-centrifugal pump; 8-recovery tank; 81-first recovery tank; 82-second recovery tank; 9-infusion tube; 10-control console; 101-warning light; 20-base plate; X-incision. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0042] Specific embodiment: A full-element surgical simulation visualized suturing and knotting training platform, the platform includes an operating table and a control console 10; the operating table includes a simulated human tissue suturing model, a simulated blood vessel suturing and knotting model, and a blood pumping device 6;

[0043] The operating table includes a simulated human tissue suturing model, which includes a simulated skin layer 1, a subcutaneous connective tissue layer 2, a fascia layer 3, a muscle layer 4 and a blood vessel layer 5 from top to bottom;

[0044] The first layer is the simulated skin layer 1, which is a three-layer composite, including the surface layer, the middle layer, and the inner layer. The surface layer and the inner layer are mixed with R-6010A silicone rubber and R-6010B silicone rubber; the middle layer is mixed with HC-0205A silicone rubber, R-890G / 20A silicone gel, and R-890G / 20B silicone gel. Different materials are used to realize the stratification of simulated skin. The surface layer simulates the appearance and touch of human skin. The middle layer coordinates the compression and elongation of the simulated skin, ensures the overall flexibility and elasticity, and provides space and position for needle insertion and suture line routing, which is convenient for suture training.

[0045] The second layer is the subcutaneous connective tissue layer 2, which is made of a mixture of silicone and a curing agent in equal proportions. It is soft and elastic and easy to sew; the third layer is the fascia layer 3, which is made of silicone rubber. The silicone rubber material has good elasticity and flexibility and can adapt to the needs of various complex shapes; the fourth layer is the muscle layer 4, which is made of an elastomeric material. The elastomeric material can simulate the mechanical properties and functional characteristics of the muscle, and has good elasticity and durability, and can restore the real muscle tissue to the greatest extent.

[0046] Each of the above four layers is provided with an incision X at the same position, and both sides of the incision X of each layer are provided with a resistance strain sensor 11 for monitoring the change of the tissue tension value on both sides of the incision X to reflect the suturing and knotting effect in real time.

[0047] The fifth layer is the blood vessel layer 5, in which the ligated blood vessel 52 and the sutured blood vessel 51 are arranged; between the inner and outer walls of the ligated blood vessel 52, there is a second annular resistance strain sensor 521 in the shape of a sleeve, which is used to monitor the changes in the pressure value of the blood vessel wall and reflect the effect of blood vessel ligation in real time. The sutured blood vessel 51 is embedded with a first annular pressure sensor 511 and a second annular pressure sensor 512 on the opposite surfaces at both ends of the blood vessel suture port, and a first annular resistance strain sensor 513 is placed on the inner wall in the shape of a sleeve, which is used to monitor the changes in the tension value of the blood vessel wall on both sides of the incision X and reflect the effect of blood vessel suture and knotting in real time; the ligated blood vessel 52 and the sutured blood vessel 51 are connected to the blood pumping device 6 through the catheter 9 at both ends to simulate blood circulation; the entire blood vessel is connected in a detachable manner and connected to the catheter 9 through a joint.

[0048] The fixing device is nested between the first and fifth layers, and auxiliary fixing slots are arranged on both the left and right sides.

[0049] The blood pumping device 6 comprises a fluid infusion tank 61 and a centrifugal pump 7 connected by a fluid conduit 9. The outlet end of the centrifugal pump 7 of the blood pumping device 6 and the inlet end of the fluid infusion tank 61 are respectively connected to the inlet end and the outlet end of the simulated blood vessel suturing and knotting model through the fluid conduit 9; the fluid infusion tank 61 is filled with blood simulation liquid, and the blood simulation liquid flows in the blood vessel under the action of the centrifugal pump 7 to simulate the blood flow state, and the simulated blood flows from the fluid infusion tank 61 through the outlet end of the centrifugal pump 7 along the outlet into the ligated blood vessel 52 and the sutured blood vessel 51, and then flows back to the fluid infusion tank 61 from the other end (outlet end) to circulate and flow to simulate blood flow; the fluid infusion tank 61 is provided with an ultrasonic liquid level sensor 62 for monitoring the change of the total amount of liquid in the liquid tank. If the liquid level in the fluid infusion tank 61 drops, it reflects that there is liquid leakage after the blood vessel is sutured, which indirectly reflects the effect of the blood vessel suture.

[0050] A "W"-shaped recovery groove 8 is arranged at the bottom of the fifth-layer blood vessel layer 5, including a first recovery groove 81 arranged at the lower end of the sutured blood vessel 51 and a second recovery groove 82 arranged at the lower end of the ligated blood vessel 52, and the simulated blood vessel suturing and knotting model is located on the plane at the highest point of the "W"-shaped groove surface; a flow outlet is opened at the lowest point of the "W"-shaped recovery groove 8, and the flow outlet is connected with the fluid infusion groove 61 through a recovery pipe, and a one-way valve is arranged on the connecting pipe in the direction of the recovery groove 8 to the fluid infusion groove 61, which is used to recover the liquid leaked due to improper operation during the blood vessel suturing process.

[0051] The above structure is fixedly mounted on the base plate 20 which serves as a supporting device. The simulated human tissue suture model is mounted horizontally at the center of the base plate 20. The blood pumping device 6 is located on the base plate 20 on the right side of the sixth layer and is fixedly connected to the base plate 20.

[0052] The console 10 includes a control display system and an alarm system. The control display system includes a main switch, a mode selection button, a display screen, a power-on wire, and a data transmission line for transmitting signals. The alarm system includes a warning light 101. When the sensors from the first layer to the fifth layer perform suture and knotting exercises, the obtained tension values ​​are transmitted to the control display system through the data transmission line, and compared with the preset tension reference value in the normal suture and knotting tension change range and threshold value. If the tension is greater than the preset value, the warning light 101 will alarm and remind in time; the warning light 101 sets the first knot operated or the first suture operation as the reference value 1. If an operation error / wrong operation occurs, there will be a sudden change in the force value (the preset change range ±20% is the normal state), and once the sudden value change exceeds the preset range, it indicates that there is a problem with the operation, and the warning light 101 (red) flashes; and the warning light 101 is yellow when the first knot or the first suture operation is read and set, and is green when the reading is completed and the operation can be continued. The red light flashes when an operation error occurs (sudden change in force value> 20%; blood flow simulation device reads blood extravasation, etc.).

[0053] The mode selection button is mainly used to select different modes (ligation, knotting, suturing) training and assessment modes, in addition to device regulation (including blood flow simulation parameters, liquid recovery) and data display and reading, device calibration, etc.

[0054] Main functions: Various training modes are recorded in the console to meet different needs in different scenarios. The operator can select different modes for ligation, suturing and knotting exercises simply by using the control button. At the same time, the power and other parameters of the blood pumping device are adjusted through the console to control the flow rate and flow of the intravascular fluid to simulate different blood vessels (such as arteries / veins, femoral / abdominal aorta / radial arteries...) for suturing and knotting, striving to simulate the most realistic training environment. And by achieving real-time monitoring and feedback of various operations, judging, prompting and recording various indicators according to the changes in the set reference values, the user's operation can be carefully and comprehensively quantitatively trained and assessed.

[0055] Calibration mode: To avoid unexpected damage to the tight connection of the blood vessels or the blood vessels themselves due to quality problems, the device will start the calibration mode after the assembly and connection of the device is completed. Once unexpected liquid leakage or abnormal mechanical feedback occurs, the device alarm light (red) flashes. After checking and eliminating the abnormal situation, it is necessary to calibrate again before entering the practice / assessment mode.

[0056] The specific practice / assessment mode is as follows:

[0057] Tissue suturing practice / assessment mode: The initial value of the first operation is read in the console and set as the baseline value 1. The console collects the changes in the tension value of the resistance strain sensor in the tissue in real time and integrates the information for real-time feedback.

[0058] Vascular ligation practice / assessment mode: Set the pressure value of the annular pressure sensor in the console when there is no external force to 0, and read the initial value of the first operation and set it as the baseline value 1. The console collects the changes in the pressure value of the annular pressure sensor in the ligated blood vessel in real time and integrates the information for real-time feedback.

[0059] Vascular suturing practice / assessment mode: The console reads the initial value of the first operation and sets it as the baseline value 1. The console collects the changes in the tension value of the annular resistance strain sensor in the sutured blood vessel in real time and integrates the information for real-time feedback. After the operation is completed, the blood pumping device starts to run, simulating blood reperfusion, and judging whether the suture effect meets the requirements by whether there is exudate and pressure changes.

Claims

1. A full-element surgical simulation visualized suturing and knotting training platform, comprising an operating table and a control console (10), wherein the operating table is placed on a base plate (20), characterized in that: The operating table comprises a simulated human tissue suturing model, a simulated blood vessel suturing and knotting model, a blood pumping device (6) and a fixing device connecting the models; The simulated human tissue suturing model comprises: a simulated skin layer (1), a subcutaneous connective tissue layer (2), a fascia layer (3) and a muscle layer (4), with a resistive strain sensor (11) placed on both sides of the incision (X) of each layer of simulated human tissue respectively; and a blood vessel layer (5) is also arranged at the innermost part; The simulated blood vessel suturing and knotting model is wrapped in a blood vessel layer (5), and comprises a suturing blood vessel (51) for suturing training and a ligating blood vessel (52) for knotting training; The blood pumping device (6) comprises a fluid infusion tank (61) and a centrifugal pump (7) connected via a fluid conduit (9); the blood pumping device (6) is connected to a simulated blood vessel suturing and knotting model via the fluid conduit (9); The fixing device is nested between the simulated skin layer (1) and the muscle layer (4) of the simulated human tissue suturing model, and auxiliary fixing slots are provided on both the left and right sides; The control console (10) comprises a control display system and an alarm system. The control display system comprises a main switch, a mode selection button, a display screen, and a power-on wire and a data transmission line for transmitting signals. The alarm system comprises a warning light (101).

2. The full-element surgical simulation visualization suturing and knotting training platform according to claim 1 is characterized in that: The sutured blood vessel (51) is provided with a suture opening, and a first annular pressure sensor (511) and a second annular pressure sensor (512) are embedded in the inner and outer wall interlayers of the blood vessel on both sides of the suture opening. The sensors detect the tension of the blood vessel wall and transmit it to the control display system of the console (10) through a data transmission line.

3. The full-element surgical simulation visualization suturing and knotting training platform according to claim 1 is characterized in that: The inner wall of the sutured blood vessel (51) is also provided with a first annular resistance strain sensor (513), and the knotting pressure detected by the sensor is transmitted to the control and display system via a data transmission line.

4. The full-element surgical simulation visualization suturing and knotting training platform according to claim 1 is characterized in that: A second annular resistance strain sensor (521) for detecting the ligation pressure of the blood vessel is arranged between the inner and outer walls of the ligated blood vessel (52), and the ligation pressure detected by the sensor is transmitted to the control and display system via a data transmission line.

5. The full-element surgical simulation visualization suturing and knotting training platform according to claim 1 is characterized in that: A "W"-shaped recovery groove (8) is provided below the training position of the sutured blood vessel (51) and the ligated blood vessel (52) for collecting liquid exuded when the suture is improper or the knot is ineffective; the first recovery groove (81) and the second recovery groove (82) are respectively provided, wherein the first recovery groove (81) is located below the sutured blood vessel (51) and the second recovery groove (82) is located below the ligated blood vessel (52).

6. The full-element surgical simulation visualized suturing and knotting training platform according to claim 5 is characterized in that: The recovery tank (8) is provided with a flow outlet, which is located at the lowest point of the first recovery tank (81) and the second recovery tank (82), and the flow outlet is connected to the liquid replenishment tank through a pipeline.

7. The full-element surgical simulation visualization suturing and knotting training platform according to claim 1, characterized in that: A liquid level sensor (62) for detecting the liquid level is arranged in the liquid replenishing tank (61).

8. The full-element surgical simulation visualized suturing and knotting training platform according to claim 1, characterized in that: The simulated blood vessel suturing and knotting model is a replaceable device, and the blood vessel is connected to the catheter (9) via a joint.

9. The full-element surgical simulation visualized suturing and knotting training platform according to claim 1, characterized in that: The warning light (101) is connected to the control display system signal and is used to remind the operator of irregular operation in real time.

10. The full-element surgical simulation visualized suturing and knotting training platform according to claim 1, characterized in that: The warning light (101) comprises three types of lights: yellow, green and red.

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