Ultrasonic guided puncture training system and method based on multi-modal feedback

Abstract

The invention relates to the field of medical simulation training instruments, in particular to an ultrasonic guided puncture training system and method based on multi-modal feedback. The system comprises a bionic tissue module, a puncture needle and a control host. Conductive target units in various shapes such as a circular shape, an oval shape and an irregular shape are embedded in the bionic tissue module according to the training difficulty gradient so as to correspond to graded training targets of different clinical scenes. And the control host is electrically connected with the puncture needle and each target point unit to form a trigger circuit. During training, an operator punctures and selects a target spot under the guidance of an ultrasonic image, and when a needle point accurately touches the target spot, a circuit is switched on and real-time acousto-optic feedback is generated. According to the method, standardized and stepped full-process puncture skill training is realized through a structured polymorphic target design and an electric and image dual-mode feedback mechanism, and the pertinence, the real-time performance and the clinical conversion effect of training are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of medical simulation training devices, specifically to an ultrasound-guided puncture training system and method based on multimodal feedback. Background Technology

[0002] In clinical medical practice, puncture procedures (such as vascular puncture, tissue biopsy, abscess drainage, etc.) are a key and commonly used diagnostic and treatment method. The skill and accuracy of the operator directly affect the patient's prognosis and safety.

[0003] Currently, puncture skill training primarily relies on traditional human models, animal experiments, and virtual simulation systems. However, these methods still face significant technical bottlenecks in terms of simulation realism, immediate feedback, scenario diversity, and training autonomy. Traditional training models often fail to provide immediate visual feedback on puncture results, requiring instructors to manually judge and verify the procedure after the trainee's operation, leading to low training efficiency and hindering trainees' self-correction. Furthermore, existing models often employ a single target design with fixed location and shape, lacking interactivity and variation in the training process. This makes it difficult to simulate real-world clinical scenarios where target location is unknown and real-time image localization is required, and it also fails to effectively cover various clinical puncture scenarios such as blood vessels, masses, and fluid cavities, limiting the development of trainees' comprehensive response capabilities. In addition, while some existing devices attempt to introduce pressure sensors or simple circuit conduction mechanisms (such as LED indicators) to provide operational feedback, their feedback dimensions are limited and the information is simplistic, making deep integration with ultrasound image guidance difficult and failing to stimulate trainees' long-term training interest and proactive learning motivation. Therefore, there is an urgent need in the field for a training system that can integrate real-time ultrasound imaging with immediate, intuitive, and multi-dimensional operational feedback to improve the authenticity, effectiveness, and adaptability of puncture skill training. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned existing problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention to solve its technical problem is as follows: The design of an ultrasound-guided puncture training system and method based on multimodal feedback is as follows: The ultrasound-guided puncture training system based on multimodal feedback includes a bionic tissue module, a control host and a puncture needle. The bionic tissue module is characterized by having multiple conductive target units with different morphological and imaging features embedded inside it according to the training difficulty gradient. The electric target unit shapes include at least circular, elliptical and irregular shapes, which are used for hierarchical training of basic positioning, directional path planning and complex scene response, respectively. A puncture needle, the body of which has a conductive part; The control host is electrically connected to the puncture needle and each conductive target point unit, and is used to form a circuit to be triggered after the target point is selected. When the conductive part of the puncture needle contacts the target conductive point unit under ultrasound image guidance, the circuit is turned on and a real-time success feedback signal is generated.

[0006] Furthermore, the conductive target unit has metallic conductive contacts, which differ from the material of the biomimetic tissue module in terms of ultrasonic impedance, so as to appear as a high-echo area in the ultrasound image.

[0007] Furthermore, the tail of the puncture needle is equipped with an ultrasonic probe docking interface for rigid connection with the ultrasonic device probe.

[0008] Furthermore, the control host also includes: The circuit main control module, feedback indicator unit, and target selection button group corresponding to the number of conductive target units.

[0009] Furthermore, the control host also includes: The power supply module is used to provide the operating voltage for the system; The number of relay components is adapted to the number of conductive target units and is controlled by the main circuit control module to independently turn on or off the circuit branches corresponding to the conductive target units.

[0010] An ultrasound-guided puncture training method based on a multimodal feedback ultrasound-guided puncture training system includes the following steps: S1: Select the target conductive point unit according to the training difficulty, and activate the corresponding circuit through the control host; S2: Use ultrasound equipment to scan the bionic tissue module and identify the position and morphological characteristics of the target conductive target unit in real-time images; S3: Based on ultrasound imaging, plan the needle insertion point and path, and guide the puncture needle for puncture; S4: When the tip of the puncture needle contacts the target conductive target unit, it receives a real-time success feedback signal from the control host to confirm that the puncture was successful.

[0011] Furthermore, it also includes a multi-target switching training step: selecting different conductive target units as targets in sequence or randomly, and repeating steps S1 to S4.

[0012] The beneficial effects of this invention are: 1. By embedding circular, elliptical, and irregularly shaped conductive target units with different ultrasound imaging characteristics into the biomimetic tissue module according to the training difficulty gradient, this system physically constructs a hierarchical training system from basic localization and directional path planning to complex scenario adaptation. This structural design enables training to accurately align with the advanced clinical skill requirements. Operators need to master the image recognition and puncture strategies of different target shapes in sequence, effectively overcoming the problems of existing training models having a single objective and being out of touch with clinical practice.

[0013] 2. The system deeply integrates with ultrasound image guidance through an electrical triggering circuit consisting of a puncture needle, a target conductive point unit, and a control unit, creating a multimodal feedback mechanism that combines visual image positioning with real-time circuit conduction signals. When the operator inserts the needle under ultrasound image guidance, once the needle tip accurately touches the conductive target point unit, the control unit immediately generates a clear success feedback signal. This feedback is immediate, objective, and requires no third-party evaluation, greatly enhancing the immersion in training and the accuracy of self-assessment, and facilitating the rapid formation of correct operational muscle memory.

[0014] 3. This invention allows for the flexible simulation of new clinical anatomical scenarios and disease characteristics by updating or rearranging biomimetic tissue modules with built-in target units of different morphologies. It provides a reliable physical basis for establishing quantifiable and comparable training and assessment standards for ultrasound puncture skills. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the ultrasound-guided puncture training system based on multimodal feedback proposed in this invention.

[0016] The above figures include the following reference numerals: 1. Bionic tissue module; 2. Control host; 3. Puncture needle; 4. Conductive target unit. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, and not all embodiments.

[0018] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or 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. Therefore, they should not be construed as limitations on this invention.

[0019] Example 1 refer to Figure 1 This invention provides an ultrasound-guided puncture training system and method based on multimodal feedback, including a biomimetic tissue module 1, a control host 2, a puncture needle 3, and a conductive target unit 4. Each structure is independently formed and forms a collaborative working system through electrical and mechanical connections. The specific structure is as follows: In practical implementation, the bionic tissue module 1 is a bionic block structure adapted to the ultrasound examination operation scenario. Inside it, several conductive target units 4 are arranged differently according to clinical training needs. These units simulate random distribution at any position in a three-dimensional plane and are designed in the form of circles, ellipses, irregular shapes, etc. The core is a metal conductive contact. Each contact is connected to an independent wire and a standardized external interface is led out from the outer wall of the module to realize the circuit connection with external components. Because the relative positions of several conductive target units 4 with the surface of the biomimetic tissue module 1 are uncertain, the target points need to be determined on ultrasound first, and then the puncture path needs to be planned. Different target shapes correspond to different levels of training objectives: circular target points have regular shapes and typical ultrasound image features, and are suitable for beginners to carry out basic needle insertion techniques and ultrasound positioning training, which can help them quickly establish puncture muscle memory and image interpretation; elliptical target points have directionality, and the ultrasound image shape changes with the probe angle. Puncture requires determining the long axis direction before planning the needle insertion path, which is more difficult to operate and is suitable for operators with basic skills to train the accuracy of path planning and accumulate experience for clinical operations such as vascular puncture; irregular target points have complex shapes and atypical image features, and are often adjacent to surrounding simulated organ components. During puncture, it is necessary to simultaneously complete the target boundary identification, avoid surrounding structures and accurately hit the target. This is the most difficult and is used for training clinicians' ability to cope with complex scenarios. It can simulate clinical scenarios such as liver tumor biopsy and train the ability to make rapid decisions and operate accurately under high pressure.

[0020] In practice, the control host 2 is a box-shaped structure, which integrates a power supply module, a main circuit control module, a feedback indicator unit, and a target selection button group. Externally, it is equipped with a power interface, a target wire interface, and a puncture needle 3 wiring interface. The power supply module uses a rechargeable lithium battery or an external power adapter to provide a stable voltage output for the entire circuit system. The main circuit control module is based on a microcontroller and is equipped with relay components. The number of relay components matches the number of conductive target units 4, enabling independent on / off control of the circuit loop corresponding to each conductive target unit 4. The feedback indicator unit is a high-brightness LED light group with color differentiation. Green LEDs indicate successful puncture, and red LEDs indicate power on or standby status. The target selection button group consists of matrix-arranged tactile buttons, with the number of buttons corresponding one-to-one with the number of conductive target units 4. Each button is labeled with target identification information to facilitate accurate target selection by the operator.

[0021] In practice, the puncture needle 3 has a slender rod-shaped structure. The needle body is made of conductive metal, and only the handheld end is encapsulated with medical insulating material to ensure that the exposed part of the needle body has conductivity. The tail of the puncture needle 3 integrates a dual-interface structure. One end is an ultrasound probe docking interface, which is compatible with the specifications of mainstream ultrasound equipment probes and can achieve a rigid connection between the puncture needle 3 and the ultrasound probe. The other end is a wire connection interface, which connects to the puncture needle 3 wiring interface of the control host 2 through the wire, so that the puncture needle 3 can be connected to the circuit system.

[0022] In specific implementation, the conductive target unit 4 is an embedded structure, fixed in a pre-set positioning slot inside the bionic tissue module 1. Its metal conductive contacts have a significant difference from the ultrasonic acoustic impedance of the bionic tissue module 1, ensuring that a clear high-echo feature can be formed in the ultrasound image. The metal conductive contacts of each conductive target unit 4 are connected one-to-one with the target wire interface of the control host 2 through independent wires. The spatial coordinates of the conductive target unit 4 in the bionic tissue module 1 and the ultrasound image coordinate system are pre-calibrated to ensure the accuracy of ultrasound positioning.

[0023] In practice, the control host 2, the conductive target unit 4 of the bionic tissue module 1, and the puncture needle 3 together form a closed circuit. When the operator presses the selection button on the control host 2 corresponding to a conductive target unit 4, the microcontroller of the main control module receives the button signal and drives the relay component of the corresponding conductive target unit 4 to engage, so that the circuit loop where the conductive target unit 4 is located is in a ready-to-conduct state. At this time, the current output by the power supply module flows through the normally open terminal of the relay to the metal conductive contact of the conductive target unit 4, forming the forward transmission path of the circuit. The puncture needle 3 is connected to the puncture needle 3 wiring interface of the control host 2 through the wire, forming the reverse return path of the circuit. Only when the tip of the puncture needle 3 contacts the metal conductive contact of the selected conductive target unit 4, the current path forms a complete closed loop. After the loop is turned on, the green LED light will light up immediately. If the tip of the puncture needle 3 does not contact the conductive target unit 4 or contacts a non-selected conductive target unit 4, the circuit is always in an open circuit state, and the LED light remains off.

[0024] In practice, the puncture needle 3 and the ultrasound device are rigidly connected through the ultrasound probe docking interface at the tail. When the ultrasound probe scans the bionic tissue module 1, the ultrasound device can simultaneously capture the spatial position information (including depth, horizontal coordinates and insertion angle) of the puncture needle 3 tip within the bionic tissue module 1, and superimpose the tip position as a highlighted mark on the real-time ultrasound image. At the same time, the bionic material of the bionic tissue module 1 has acoustic impedance characteristics similar to those of human soft tissue. The metal conductive contacts of the conductive target unit 4 present a distinct high-echo zone in the ultrasound image, forming a clear boundary with the surrounding bionic tissue. The operator can directly observe the position of the conductive target unit 4 and the relative distance between the needle tip and the target point through the ultrasound image, and adjust the insertion direction and speed of the puncture needle 3 based on the image information to achieve coordinated guidance of ultrasound image positioning and mechanical puncture operation.

[0025] In practice, the feedback indication unit works in conjunction with the puncture operation as follows: When the operator, under ultrasound guidance, inserts the tip of the puncture needle 3 to the position of the conductive target unit 4 and contacts the metal conductive contact, the circuit is instantly connected. The green LED of the control host 2 illuminates at the moment of connection, providing the operator with an intuitive visual feedback signal. This allows the operator to confirm the successful puncture status in real time without relying on external verification or subsequent image review. In multi-target training scenarios, the target selection button group of the control host 2 corresponds one-to-one with the circuit loop of each conductive target unit 4. The operator can quickly switch the target to be punctured by pressing different buttons. At this time, the ultrasound image synchronously updates the position display of the corresponding conductive target unit 4, and the feedback indication unit only responds to the conduction status of the currently selected conductive target unit 4.

[0026] Example 2 Ultrasound-guided puncture training methods refer to Figure 1 During training, the operator first presses the selection button for the corresponding conductive target unit 4 on the control panel of the control host 2 according to the preset training objectives. At this time, the main control module of the circuit drives the relay corresponding to the conductive target unit 4 to engage, and the red standby indicator light on the control host 2 flashes, indicating that the circuit of the conductive target unit 4 is in the ready-to-conduct state. The operator observes the real-time image of the ultrasound equipment, identifies the position, depth and structural features of the surrounding bionic tissue of the selected conductive target unit 4, marks the needle entry point on the image (the needle entry point selection must avoid other conductive target units 4 and wires in the bionic tissue module 1), and plans the needle entry angle according to the target depth.

[0027] After completing the path planning, the operator holds the insulated handheld end of the puncture needle 3, aligns the needle tip with the puncture point marked on the image, and slowly inserts the needle along the planned path. During the insertion process, the operator continuously observes the real-time position of the needle tip in the ultrasound image and adjusts the insertion direction and speed according to the relative distance between the needle tip and the conductive target unit 4 displayed in the image to prevent the needle tip from deviating from the planned path. When the needle tip of the puncture needle 3 contacts the metal conductive contact of the conductive target unit 4, the circuit is closed and conduction is achieved, and the green LED on the control host 2 lights up immediately. After observing the feedback signal, the operator stops the insertion and confirms that the puncture is successful. If the green LED does not light up, the operator judges the deviation direction (horizontal deviation or depth deviation) between the needle tip and the conductive target unit 4 through the ultrasound image, adjusts the position of the puncture needle 3, and re-inserts the needle until the circuit is completed and the green light lights up.

[0028] In the multi-target switching training scenario, the operator presses different target selection buttons on the control host 2 in a preset order or randomly. After each target switch, the operator needs to re-identify the positional characteristics of the new conductive target unit 4 through ultrasound imaging, quickly adjust the needle insertion point and angle, and complete the puncture operation within a specified time. This training mode improves the operator's ability to quickly locate targets at different positions and depths, and enhances operational adaptability. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ultrasound-guided puncture training system based on multimodal feedback, comprising a biomimetic tissue module (1), a control host (2), and a puncture needle, characterized in that, The biomimetic tissue module (1) contains multiple conductive target units (4) with different morphological and imaging characteristics, which are embedded in the interior according to the training difficulty gradient. The electric target unit (4) has a shape including a circle, an ellipse and an irregular shape, which are used for basic positioning, directional path planning and hierarchical training of complex scene response, respectively. The puncture needle (3) has a conductive part in its body; The control host (2) is electrically connected to the puncture needle (3) and each conductive target unit (4) to form a circuit to be triggered after the target point is selected; When the conductive part of the puncture needle (3) under ultrasound guidance contacts the target conductive target unit (4), the circuit is turned on and a real-time success feedback signal is generated.

2. The ultrasound-guided puncture training system based on multimodal feedback according to claim 1, characterized in that, The conductive target unit (4) has a metal conductive contact, and its material differs from that of the biomimetic tissue module (1) in terms of ultrasonic acoustic impedance, so that it appears as a high echo region in the ultrasound image.

3. The ultrasound-guided puncture training system based on multimodal feedback according to claim 1, characterized in that, The tail of the puncture needle (3) is provided with an ultrasonic probe docking interface for connecting with the ultrasonic device probe.

4. The ultrasound-guided puncture training system based on multimodal feedback according to claim 1, characterized in that, The control host (2) also includes: A set of target selection buttons corresponding to the number of main circuit control module, feedback indicator unit and conductive target unit (4).

5. The ultrasound-guided puncture training system based on multimodal feedback according to claim 4, characterized in that, The control host (2) also includes: The power supply module is used to provide the operating voltage for the system; The number of relay components is adapted to the number of the conductive target units (4) and is controlled by the main circuit control module to independently turn on or off the circuit branches corresponding to the conductive target units (4).

6. A method for ultrasound-guided puncture training based on the ultrasound-guided puncture training system based on multimodal feedback as described in any one of claims 1-5, characterized in that, Includes the following steps: S1: Select the target conductive target unit (4) according to the training difficulty, and activate the corresponding circuit through the control host (2); S2: Use ultrasound equipment to scan the bionic tissue module (1) and identify the position and morphological characteristics of the target conductive target unit (4) in real-time images; S3: Based on ultrasound imaging, plan the needle insertion point and path, and guide the puncture needle (3) to perform puncture; S4: When the tip of the puncture needle (3) contacts the target conductive target unit (4), it receives a real-time success feedback signal from the control host (2) to confirm the successful puncture.

7. The acoustically guided puncture training method according to claim 6, characterized in that, It also includes a multi-target switching training step: select different conductive target units (4) as targets in sequence or randomly, and repeat steps S1 to S4.

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