Corneal foreign body removal training device

Abstract

The invention discloses a cornea foreign body removal training device. The cornea foreign body removal training device mainly comprises an operation table, the device is characterized in that a head model, an auxiliary supporting mechanism and an auxiliary removing mechanism are arranged on the operation table; the human head model is provided with a simulated cornea module, and a foreign body block is embedded in the simulated cornea module and used for simulating the embedding of a foreign body in a human eyeball cornea; the auxiliary supporting mechanism comprises a reset elastic piece and an auxiliary supporting plate used for supporting the arm of the human body. One end of the reset elastic piece is connected with the operation table, and the other end of the reset elastic piece is connected with the auxiliary supporting plate. The auxiliary supporting plate, the reset elastic piece and the operation table are sequentially arranged in the gravity direction. The auxiliary removing mechanism comprises a wrist supporting part, a suspension arm, a removing needle and a distance measuring alarm device. The wrist supporting part is connected with the auxiliary supporting plate; the distance measuring alarm device comprises a distance measuring device, an alarm and a control device. The device has the advantages of simple structure, good training effect and the like.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a corneal foreign body removal training device. Background Technology

[0002] Corneal foreign body removal is a common emergency ophthalmological procedure used to remove foreign objects embedded in the outermost layer of the cornea (the transparent tissue), such as metal fragments, sand, and glass shards. The procedure is usually performed under local anesthesia and magnified under a slit-lamp microscope. The doctor uses a sterile syringe needle or a specialized foreign body scraper to gently scrape away the foreign body along with any surrounding rust rings (common with ferrous foreign bodies) to thoroughly remove the foreign body while minimizing damage to surrounding healthy corneal tissue.

[0003] Corneal metallic foreign bodies are a common emergency in ophthalmology clinics, with iron foreign bodies being the most frequent. Once embedded in the cornea, these foreign bodies are prone to oxidation and the formation of a rust ring if not treated promptly. This not only increases the difficulty of removal but also raises the risk of corneal infection and inflammation. Currently, a 1ml syringe needle is commonly used clinically as the primary tool for precisely scraping away the rust ring with its sharp tip. However, this technique requires a high degree of stability and skill from the operator, especially for novice physicians. Mental tension often leads to hand tremors, causing hesitation during the removal of the foreign body or scraping of the rust ring, or insufficient treatment of deeply embedded rust rings, for fear of over-scraping and causing corneal perforation, thus affecting treatment outcomes and potentially delaying the condition. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a corneal foreign body removal training device that removes foreign bodies cleanly, operates stably, and has good training effects.

[0005] The present invention achieves the above objectives by employing the following technical solution:

[0006] A corneal foreign body removal training device mainly includes an operating table; characterized in that a human head model, an auxiliary support mechanism, and an auxiliary removal mechanism are provided on the operating table; a simulated corneal module is installed on the human head model, and the simulated corneal module is embedded with a foreign body block to simulate a foreign body embedded in the cornea of ​​a human eyeball.

[0007] The auxiliary support mechanism includes a reset elastic element and an auxiliary support plate; one end of the reset elastic element is connected to the operating table, and the other end of the reset elastic element is connected to the auxiliary support plate; the auxiliary support plate is used to support the human arm, and the auxiliary support plate, the reset elastic element, and the operating table are arranged sequentially along the direction of gravity;

[0008] The auxiliary removal mechanism includes a wrist support, a boom, a removal needle, and a ranging alarm device. The wrist support is connected to the auxiliary support plate. The boom is positioned above and connected to the wrist support. One end of the removal needle relative to its tip is hinged to the boom, so that the tip of the removal needle can correspond to the simulated corneal module. The ranging alarm device includes a rangefinder, an alarm, and a control device. The rangefinder is positioned on the removal needle so that its ranging path is parallel to the extension direction of the removal needle. The rangefinder is a laser ranging module used to detect the distance at which the removal needle penetrates the simulated corneal module. The alarm is a buzzer or LED light positioned on the removal needle. The control device is electrically connected to the rangefinder and the alarm.

[0009] The above technical solution further includes: the auxiliary support mechanism further includes a first base and a second base, the first base being connected to the reset elastic member; the second base being pivotally connected to the first base and connected to the auxiliary support plate, so that the auxiliary support plate can rotate horizontally relative to the first base.

[0010] Furthermore, the auxiliary support plate is hinged to the second base so that the auxiliary support plate swings relative to the second base in a vertical direction; the auxiliary support plate, the second base, the first base and the reset elastic element are arranged sequentially along the direction of gravity.

[0011] Furthermore, the operating platform is also provided with a travel limiting groove, which extends along the direction of gravity; the bottom end of the first base is connected to a travel limiting post, which extends along the direction of gravity, so that the travel limiting post can move within the travel limiting groove.

[0012] Furthermore, the reset elastic element is a reset spring, which is sleeved on the travel limiting post; the travel limiting groove has a vertical guide groove, and the travel limiting post is provided with a guide slider, which is slidably connected to the vertical guide groove.

[0013] Furthermore, the wrist support is an annular plate, and the auxiliary removal mechanism also includes a third base, which is located above the wrist support and hinged to it. The third base is connected to the boom so that the boom can swing vertically relative to the wrist support.

[0014] Furthermore, the boom is pivotally connected to the third base so that the boom can rotate horizontally relative to the third base.

[0015] Furthermore, the rejection needle is connected to the boom via a ball joint.

[0016] Furthermore, the rejection needle is provided with a gripping part and a ranging trajectory protection plate. The gripping part extends along the rejection needle and is connected to the ranging trajectory protection plate. The ranging trajectory protection plate extends along the ranging trajectory direction of the rangefinder and is used to prevent human fingers from obstructing the ranging trajectory of the rangefinder.

[0017] Furthermore, the human head model is provided with a simulated eye socket base, and the simulated corneal module is detachably installed on the simulated eye socket base; the simulated corneal module is made of hydrogel, and the simulated eye socket base is made of engineering plastic.

[0018] The beneficial effects that can be achieved by adopting the above-mentioned technical solution in this invention are:

[0019] 1. Based on a human head model, a simulated corneal module is installed. The simulated corneal module is embedded with a foreign body block to simulate a foreign body embedded in the cornea of ​​a human eyeball. The combination of the simulated corneal module and the foreign body block can simulate common corneal foreign body conditions in clinical practice in a very realistic way. It provides trainees with a training environment that is close to a real human eyeball. This high degree of simulation helps trainees overcome psychological barriers when operating on real people and can more accurately practice and feel the feel and resistance in the process of foreign body removal, thereby improving the realism of the training and the final effect.

[0020] 2. One end of the reset elastic element is connected to the operating table, and the other end is connected to the auxiliary support plate. The auxiliary support plate, the reset elastic element, and the operating table are arranged sequentially along the direction of gravity. The auxiliary support plate provides a stable plane for the trainee's forearm or wrist, so that the arm does not need to be suspended in the air during the operation, thereby reducing physiological tremors caused by muscle fatigue. At the same time, the reset elastic element can buffer and prevent the trainee from lowering the needle too deeply, which can effectively reduce the probability of damage or puncture of the simulated cornea and provide crucial safety protection for the training process.

[0021] 3. Based on the connection between the wrist support and the auxiliary support plate, the hanging arm is located above the wrist support and connected to it, and the other end of the eliminator needle relative to the needle tip is hinged to the hanging arm, so that the tip of the eliminator needle can correspond to the simulated corneal module. This hinge method cleverly restricts the freedom of the eliminator needle in most directions, so that it can only make arc-shaped movements towards or away from the simulated corneal module with a preset fulcrum as the center. This avoids the lateral or oblique swiping movements that trainees are most likely to make, and isolates the operational risks within the safety boundary. At the same time, it guides the operator to focus on the key "insertion and lifting" actions, especially allowing the trainee to adjust to a suitable and comfortable angle, that is, the right-hand side posture that is conducive to scraping the rust ring when holding the eliminator needle with the right hand. Trainees can train according to this posture to deal with the problem of not being able to completely scrape the rust ring with the right hand in actual combat and having to consider switching hands (not being proficient after switching hands), thus standardizing the basic operating posture.

[0022] 4. The rangefinder is located on the removal needle so that its measuring path is parallel to the extension direction of the removal needle. The rangefinder is used to detect the distance at which the removal needle penetrates the simulated corneal module. The alarm is located on the removal needle and electrically connected to the rangefinder. The detection beam emitted by the rangefinder is parallel to the needle body of the removal needle, which means that it measures the relative distance directly in front of the needle tip. When the needle tip approaches and penetrates the simulated corneal module, the rangefinder reads the real-time and accurate distance change between the needle tip and the corneal surface or internal tissue. This avoids measurement errors caused by angle issues, ensuring the absolute authenticity and reliability of the data. Moreover, when the rangefinder detects that the insertion depth of the removal needle reaches or exceeds a preset safety threshold (e.g., a certain percentage of corneal thickness, simulating the dangerous depth of impending perforation), it immediately transmits an electrical signal to the alarm. The alarm then issues a warning in the form of sound, light, or vibration, allowing the trainee to immediately realize the error and adjust the force and depth, forming a conditioned reflex. Through the accumulation of training sessions, the trainee's sensitivity and control over the depth of operation are improved, increasing the accuracy and reducing the probability of hand tremors. Ultimately, this gradually reduces psychological burden and improves training proficiency. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a corneal foreign body removal training device according to the present invention.

[0024] Figure 2 for Figure 1 A magnified view of a portion at point A shown.

[0025] Figure 3 for Figure 1 A cross-sectional perspective view.

[0026] Figure 4 for Figure 3 A magnified view of point B shown.

[0027] Explanation of reference numerals in the attached drawings: 1. Operating table; 2. Human head model; 201. Simulated cornea module; 202. Simulated eye socket base; 3. Auxiliary support mechanism; 301. Reset elastic element; 302. Auxiliary support plate; 303. First base; 304. Second base; 4. Auxiliary removal mechanism; 401. Wrist support; 402. Hanging arm; 403. Removal needle; 413. Grip; 423. Range measuring trajectory protection plate; 404. Range measuring alarm device; 414. Rangefinder; 424. Alarm; 405. Third base; 5. Travel limit groove; 6. Travel limit post; 7. Vertical guide groove; 8. Guide slider. Detailed Implementation

[0028] In the description of this invention, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in the description of this invention, "at least" means one or more, unless otherwise explicitly specified.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, unless otherwise specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "below" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0033] like Figures 1-4 As shown, the present invention is a corneal foreign body removal training device, including a human head model 2, an operating table 1, an auxiliary support mechanism 3, and an auxiliary removal mechanism 4.

[0034] The operating table 1 serves as the base of the entire device, not only providing a simple load-bearing function, but also typically featuring fixed slots or mounting positions on its surface. This ensures that the human head model 2 remains stable during training and will not shift or tip over due to touch during operation, providing a reliable foundation platform for precise operations.

[0035] A human head model 2 is installed on the operating table 1. The human head model 2 is equipped with a simulated corneal module 201, which contains embedded foreign body blocks to simulate foreign objects embedded in the cornea of ​​a human eye. Specifically, the human head model 2 provides the operator with a highly realistic training subject; its eye structure and contours mimic a real person to create a realistic surgical scenario. The simulated corneal module 201 is typically made of transparent or translucent elastic materials (such as silicone or hydrogel), and its hardness and texture are similar to a real cornea, allowing trainees to experience realistic tactile sensations. The pre-embedded foreign body blocks can simulate foreign objects of different materials and sizes, such as metal shavings and sand grains, increasing the diversity and specificity of the training.

[0036] The auxiliary support mechanism 3 includes a reset elastic element 301 and an auxiliary support plate 302. One end of the reset elastic element 301 is connected to the operating table 1, and the other end is connected to the auxiliary support plate 302. The auxiliary support plate 302 is used to support the human arm. The auxiliary support plate 302, the reset elastic element 301, and the operating table 1 are arranged sequentially along the direction of gravity. Specifically, the core purpose of this mechanism is to train and cultivate the operator's stable arm support habits. The reset elastic element 301 (such as a spring, elastic sponge, etc.) provides a dynamic and buffered support force. When the operator presses their arm onto the auxiliary support plate 302, the elastic element is compressed. When adjusting the arm pressure, the height of the support plate will be slightly adjusted accordingly, thereby simulating the state in which the arm needs to move flexibly rather than be completely stiff during surgery. This series design along the direction of gravity makes the support feel more ergonomic and can effectively reduce arm fatigue caused by long-term operation.

[0037] The auxiliary removal mechanism 4 includes a wrist support 401, a boom 402, a removal needle 403, and a ranging alarm device 404; the wrist support 401 is connected to the auxiliary support plate 302; the boom 402 is located above the wrist support 401 and connected to the wrist support 401; the other end of the removal needle 403 relative to the needle tip is hinged to the boom 402 so that the needle tip of the removal needle 403 can correspond to the simulated corneal module 201; the ranging alarm device 404... The alarm device 404 includes a rangefinder 414, an alarm 424, and a control device. The rangefinder 414 is disposed on the removal needle 403 such that its measuring path is parallel to the extension direction of the removal needle 403. The rangefinder 414 is used to detect the distance at which the removal needle 403 pierces the simulated corneal module 201. The alarm 424 is disposed on the removal needle 403. The control device is electrically connected to both the rangefinder 414 and the alarm 424. Specifically, the wrist support 401 is connected to the auxiliary support plate 302 to form a support structure from the arm to the wrist, guiding the operator to adopt a correct and stable posture. The ball joint design of the boom 402 and the removal needle 403 gives the removal needle 403 a degree of freedom of movement in multiple directions, simulating the flexible movement of needles in real surgery, but at the same time, it limits excessive and unsafe range of movement through the fulcrum. The most crucial component is the ranging alarm device 404. Its rangefinder 414 (such as a miniature laser rangefinder or infrared rangefinder) accurately calculates the real-time insertion depth of the removal needle 403 by monitoring changes in its distance from the corneal surface. Once the depth exceeds a preset safety value (such as a safe proportion of corneal thickness), an alarm signal is emitted and transmitted to the control device (a microcontroller, such as Arduino, ESP32, or a more professional embedded type, the STM32 series). The control system then transmits the signal to the alarm 424 (such as a buzzer or LED light). The alarm 424 amplifies the alarm signal and immediately issues a warning, thereby training the operator's sensitivity and control over the insertion depth and avoiding serious complications such as corneal perforation during real surgery.

[0038] Preferably, the auxiliary support mechanism 3 further includes a first base 303 and a second base 304. The first base 303 is connected to the first reset elastic member 301. The second base 304 is pivotally connected to the first base 303 and connected to the auxiliary support plate 302, so that the auxiliary support plate 302 can rotate horizontally relative to the first base 303. Specifically, the first base 303, as the fixed part of the rotating assembly, is firmly connected to the lower reset elastic element 301. The second base 304 is pivotally connected to the first base 303 via a pivot (such as a rotating shaft or bearing), forming a horizontal rotating pair. This allows the auxiliary support plate 302, which is directly connected to the second base 304, to not only perform vertical buffering movements with the elastic element, but also to rotate at a certain angle in the horizontal plane. This design allows the trainee to finely adjust the angle of the support plate by moving their arm without shifting their body center of gravity, thereby more comfortably and flexibly aligning the tip of the removal needle 403 with different positions on the simulated corneal module 201. It also reduces muscle tension and hand tremors caused by forcibly twisting the body or arm, allowing doctors to operate in the most natural and comfortable posture, thereby reducing unnecessary shaking at the source and enhancing the effectiveness of training and the rationality of the operating posture.

[0039] Preferably, the auxiliary support plate 302 is hinged to the second base 304, so that the auxiliary support plate 302 swings relative to the second base 304 in the vertical direction; the auxiliary support plate 302, the second base 304, the first base 303, and the reset elastic element 301 are arranged sequentially along the direction of gravity. Specifically, the auxiliary support plate 302 is connected to the lower second base 304 by a hinge mechanism, so that the support plate can pitch and swing at a certain angle in the sagittal plane (i.e., the front-to-back direction) or the coronal plane (i.e., the left-to-right direction) about the hinge axis. The entire support mechanism is arranged in the following order along the direction of gravity: the uppermost auxiliary support plate 302, below which is the second base 304 responsible for swinging, then the first base 303 responsible for horizontal rotation, and the bottommost is the reset elastic element 301 that provides elastic support. This multi-degree-of-freedom (vertical buffering-horizontal rotation-vertical swinging) composite design allows the auxiliary support plate 302 to fully adapt to different operators' arm lengths, operating habits, and wrist postures at different positions on the simulated corneal module 201. This frees the forearm and hand muscles from the burden of maintaining a fixed posture, reduces the frequency of low-frequency tremors caused by muscle fatigue, and improves the realism and effectiveness of training.

[0040] Preferably, the operating table 1 is further provided with a travel limiting groove 5, which extends along the direction of gravity; a travel limiting post 6 is connected to the bottom end of the first base 303, which also extends along the direction of gravity, so that the travel limiting post 6 can move within the travel limiting groove 5. Specifically, the travel limiting groove 5 is a narrow guide groove vertically opened on the operating table 1, and the corresponding travel limiting post 6 is vertically fixed to the bottom end of the first base 303 and precisely inserted into the travel limiting groove 5. When the operator's arm presses down, the travel limiting post 6 is forced to move downward along the trajectory of the travel limiting groove 5 through the auxiliary support plate 302 and the base compression reset elastic member 301; when the pressure decreases, the travel limiting post 6 returns to its original position upward along the groove. This guiding action effectively restricts any unintended movement of the first base 303 and the entire support mechanism above it on the horizontal plane, forcing the reset elastic member 301 to only perform pure axial compression and extension, eliminating the problem of lateral swaying or twisting that may occur in the reset elastic member 301 during compression and rebound, and ensuring that it always works smoothly in the preset vertical direction.

[0041] Preferably, the reset elastic element 301 is a reset spring, which is sleeved on the travel limiting post 6; the travel limiting groove 5 has a vertical guide groove 7, and the travel limiting post 6 is provided with a guide slider 8, which is slidably connected to the vertical guide groove 7. Specifically, the reset spring is directly sleeved on the outside of the travel limiting post 6, which effectively prevents the reset spring from bending or shifting laterally during compression, ensuring that it is evenly stressed and has a straight movement trajectory. At the same time, in order to further optimize the stability and accuracy of the guide, a vertical guide groove 7 (e.g., one or more T-grooves or dovetail grooves) is provided on the inner wall of the travel limiting groove 5, and a guide slider 8 is correspondingly installed on the travel limiting post 6. This sliding connection between the guide slider 8 and the vertical guide groove 7 transforms the original possible line contact or point contact friction into a surface contact sliding pair, increasing the contact area and stability of the guide, and can more effectively suppress the shaking and twisting of the entire support mechanism during movement, allowing the novice physician's hand muscles to relax, reducing the amplitude and frequency of hand tremors, and ensuring the stability of the operation training.

[0042] Preferably, the wrist support 401 is an annular plate, and the auxiliary removal mechanism 4 further includes a third base 405. The third base 405 is located above the wrist support 401 and hinged to it. The third base 405 is connected to the boom 402 so that the boom 402 can swing vertically relative to the wrist support 401. Specifically, the wrist support 401 is embodied as an annular plate, whose shape is more in line with the physiological structure of the human wrist, and can stably support the wrist, thereby improving comfort during long-term training. The third base 405 is hinged to the annular wrist support 401 at one or more points. This allows the boom 402 fixed on the third base 405 to swing back and forth or left and right as a whole in a plane perpendicular to the wrist support 401 (i.e., along the vertical direction). This design allows the operator to flexibly adjust the angle of the boom 402 and the removal needle 403 in the vertical plane by micro-moving the forearm while stably supporting the wrist. This allows for more precise and effortless aiming of the needle tip at and approaching the simulated corneal module 201, enhancing the freedom of operation.

[0043] Preferably, the boom 402 is pivotally connected to the third base 405, allowing the boom 402 to rotate horizontally relative to the third base 405. Specifically, the root of the boom 402 is connected to the third base 405 via a pivot structure (such as a shaft or bearing), forming a horizontal revolute joint. This allows the entire boom 402 and the removal needle 403 suspended at its end to rotate around an axis in the horizontal plane as a whole. Combined with the aforementioned vertical swing, the boom 402 effectively achieves spherical motion capability. This design allows the operator to easily cover all areas of the simulated corneal module 201 (e.g., from the nasal side to the temporal side) with just a slight wrist rotation, without needing to move the arm or body significantly. This avoids the need to frequently lift and move the entire arm to expand the operating range, reduces instability caused by large changes in body position and tremors caused by repositioning, and maintains the continuity of operation and hand stability.

[0044] Preferably, the rejection needle 403 is connected to the boom 402 via a ball joint. Specifically, the rejection needle 403 has multiple degrees of freedom of movement in multiple directions, such as forward and backward, left and right, through this structure. This allows the operator to finely adjust the needle tip orientation and contact angle by adjusting the rejection needle 403 itself with their fingers after determining the approximate macroscopic position and angle through the wrist support 401 and the boom 402. This suppresses hand tremors at the final critical moment of operation and maintains the stability of training.

[0045] Preferably, the rejection needle 403 is provided with a grip portion 413 and a ranging trajectory protection plate 423. The grip portion 413 extends along the rejection needle 403 and is connected to the ranging trajectory protection plate 423. The ranging trajectory protection plate 423 extends along the ranging trajectory direction of the rangefinder 414 and is used to prevent human fingers from obstructing the ranging trajectory of the rangefinder 414. Specifically, the grip portion 413 extends along the needle body, and its surface is usually designed with anti-slip textures or grooves conforming to the shape of fingers to guide and fix the operator's finger grip posture. By providing a stable and comfortable grip, it reduces muscle fatigue and micro-vibrations caused by unstable grip or improper force, thereby improving the stability of operation. The ranging trajectory protection plate 423 extends from the grip 413 toward the needle tip. Its surface is precisely arranged along the ranging path (usually the laser path) of the rangefinder 414, isolating the possibility of the operator's finger accidentally entering and blocking the ranging optical path. This ensures that the rangefinder 414 can continuously and accurately monitor the distance between the needle tip and the corneal surface. By eliminating the interruption of distance monitoring or data inaccuracy caused by finger obstruction, it ensures that the alarm system can be reliably triggered at critical moments. This forces the trainee to form a conditioned reflex to the insertion depth, avoiding panic caused by missing or delayed information and the resulting operational tremors, systematically reducing risks and improving training quality.

[0046] Preferably, the human head model 2 includes a simulated eye socket base 202, and a simulated corneal module 201 is detachably mounted on the simulated eye socket base 202. The simulated corneal module 201 is made of hydrogel, and the simulated eye socket base 202 is made of engineering plastic. The rangefinder 414 is a laser rangefinder module, and the alarm 424 is a buzzer. Specifically, the simulated eye socket base 202, as an installation platform, is made of engineering plastic (such as ABS or polycarbonate), ensuring sufficient structural strength and dimensional stability to withstand repeated disassembly and assembly operations. The detachable connection design between the simulated corneal module 201 and the base allows the module to be used as an independent consumable. When it is damaged due to repeated training or when different types of foreign objects need to be replaced, it can be quickly replaced, reducing maintenance costs and improving training efficiency. The transparency, water content, elasticity, and mechanical properties (such as toughness and friction) of the hydrogel are extremely close to those of real human corneal tissue, providing trainees with realistic visual and tactile feedback. This realistic operational feedback helps doctors to control the dissection force more quickly. When the operating force and feel are matched, the tentative movements and nervous hand tremors caused by excessive force or unclear tactile sensation can be prevented. The rangefinder 414 is specifically embodied as a laser rangefinder module, which, due to its high precision, fast response and good directionality, can ensure the accuracy of depth measurement. The alarm 424 is specifically embodied as a buzzer, which can provide an immediate and clear audible warning signal. Once the operating depth is exceeded, the sharp sound emitted by the buzzer can immediately interrupt the incorrect operation. Through the negative feedback mechanism, it reminds the doctor to adjust the gesture and force, thereby training the muscle memory to complete the operation within the safe depth, avoiding corneal perforation caused by depth judgment errors in real surgery, and indirectly enhancing confidence and stabilizing hand movements by standardizing the operating boundary.

[0047] The working principle of the corneal foreign body removal training device of the present invention is as follows:

[0048] During operation, the head model 2 with the simulated corneal module 201 installed is first placed on the operating table 1. The trainee supports his arm on the auxiliary support plate 302, which is connected to the operating table 1 through the reset elastic element 301 to provide stable support, and rests his wrist on the wrist support part 401. Then, he holds the removal needle 403, which is hinged to the wrist support part 401 through the boom 402, and aligns the needle tip with the foreign object embedded in the simulated corneal module 201 to perform a simulated removal operation. During this process, the rangefinder 414, which is set on the removal needle 403 and parallel to the ranging path, will detect the piercing depth in real time. When the safety threshold is exceeded, the alarm 424, which is electrically connected to the rangefinder 414, will sound an alarm.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, such as using a helmet-style outer cover, etc., and these all fall within the protection scope of the present invention.

Claims

1. A corneal foreign body removal training device, characterized in that, It mainly includes an operating table; characterized in that the operating table is provided with a human head model, an auxiliary support mechanism and an auxiliary removal mechanism; a simulated corneal module is installed on the human head model, and the simulated corneal module is embedded with a foreign object block to simulate a foreign object embedded in the cornea of ​​a human eyeball; The auxiliary support mechanism includes a reset elastic element and an auxiliary support plate for supporting the human arm; one end of the reset elastic element is connected to the operating table, and the other end of the reset elastic element is connected to the auxiliary support plate; the auxiliary support plate, the reset elastic element, and the operating table are arranged sequentially along the direction of gravity; The auxiliary removal mechanism includes a wrist support, a boom, a removal needle, and a ranging alarm device. The wrist support is connected to the auxiliary support plate. The boom is positioned above and connected to the wrist support. The other end of the removal needle relative to its tip is hinged to the boom, so that the tip of the removal needle can correspond to the simulated corneal module. The ranging alarm device includes a rangefinder, an alarm, and a control device. The rangefinder is positioned on the removal needle so that its ranging path is parallel to the extension direction of the removal needle. The rangefinder is a laser ranging module used to detect the distance at which the removal needle penetrates the simulated corneal module. The alarm is a buzzer or LED light positioned on the removal needle. The control device is electrically connected to the rangefinder and the alarm.

2. The corneal foreign body removal training device according to claim 1, characterized in that, The auxiliary support mechanism further includes a first base and a second base. The first base is connected to the reset elastic member. The second base is pivotally connected to the first base and connected to the auxiliary support plate, so that the auxiliary support plate can rotate horizontally relative to the first base.

3. The corneal foreign body removal training device according to claim 2, characterized in that, The auxiliary support plate is hinged to the second base so that the auxiliary support plate swings relative to the second base in a vertical direction; the auxiliary support plate, the second base, the first base and the reset elastic element are arranged sequentially along the direction of gravity.

4. The corneal foreign body removal training device according to claim 2, characterized in that, The operating platform is also provided with a travel limit groove, which extends along the direction of gravity; the bottom end of the first base is connected to a travel limit post, which extends along the direction of gravity, so that the travel limit post can move within the travel limit groove.

5. The corneal foreign body removal training device according to claim 4, characterized in that, The reset elastic element is a reset spring, which is sleeved on the travel limiting post; the travel limiting groove has a vertical guide groove, and the travel limiting post is provided with a guide slider, which is slidably connected to the vertical guide groove.

6. The corneal foreign body removal training device according to claim 1, characterized in that, The wrist support is an annular plate, and the auxiliary removal mechanism also includes a third base. The third base is located above the wrist support and is hinged to the wrist support. The third base is connected to the boom so that the boom can swing vertically relative to the wrist support.

7. The corneal foreign body removal training device according to claim 6, characterized in that, The boom is pivotally connected to the third base so that the boom can rotate horizontally relative to the third base.

8. The corneal foreign body removal training device according to claim 7, characterized in that, The removal needle is connected to the boom by a ball joint.

9. The corneal foreign body removal training device according to claim 1, characterized in that, The rejection needle is provided with a gripping part and a distance measuring trajectory protection plate; the gripping part extends along the rejection needle and is connected to the distance measuring trajectory protection plate, which extends along the distance measuring trajectory of the distance measuring device and is used to prevent human fingers from obstructing the distance measuring trajectory of the distance measuring device.

10. The corneal foreign body removal training device according to claim 1, characterized in that, The human head model is equipped with a simulated eye socket base, and the simulated cornea module is detachably installed on the simulated eye socket base; the simulated cornea module is made of hydrogel, and the simulated eye socket base is made of engineering plastic.

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