Medical model for simulating auricular point bloodletting and preparation method thereof

Abstract

This invention relates to medical simulation models, specifically a medical simulation model for ear acupuncture bloodletting, comprising a blood bag and a simulated ear silicone outer layer. The blood bag has an oval-shaped capsule-shaped soft shell containing viscous simulated blood. A thin silicone layer is formed on the outer layer of the capsule-shaped soft shell through casting. This thin silicone layer can deform and form micro-cracks under external pressure. The simulated ear silicone is formed by casting a silicone solution through a corresponding model. A groove is made at the ear acupuncture point on the simulated ear silicone. After placing the blood bag in the groove, a layer of silicone liquid is applied to the outside of the blood bag to completely cover the groove, forming a semi-transparent covering silicone. The beneficial effects achieved by this invention are: low cost and reusability; it can realistically simulate the process of real bleeding and exudation from ear acupuncture points, both visually and tactilely, thus providing medical personnel with an extremely realistic situation for practicing "ear acupuncture bloodletting," facilitating the improvement of the safety and success rate of subsequent clinical operations.

Description

Technical Field

[0001] This invention relates to the field of medical simulation model technology, and in particular to a medical simulation model for auricular bloodletting and its preparation method. Background Technology

[0002] In the medical field, ear models are needed to treat ear-related diseases. Currently, commonly used models include: display ear models, 3D printed minimally invasive models, and pig ear simulators.

[0003] Exhibitory ear models currently on the market are mainly used for anatomical demonstrations. The primary function of these models is to reproduce the shape of the auricle for students to observe or photograph, and they do not possess any internal structures (such as blood vessels) or physiological functions (such as blood vessels for bleeding or hemostasis).

[0004] 3D printing of minimally invasive models can construct intricate vascular networks (such as ear acupuncture vessels) on a tiny scale. However, the initial modeling of such models is difficult, requiring specialized medical imaging segmentation technology to reconstruct the microvessels. In addition, due to the small size of the models and the fineness of the blood vessels, actual printing often takes several hours to more than ten hours, resulting in a long printing time. Moreover, the materials have poor simulation properties; most photocurable resins have high hardness and cannot simulate the soft elasticity of skin.

[0005] Pig ear models, or pig ears, are common natural biological models frequently used in basic medical experiments. However, the shape of a pig ear differs significantly from that of a human ear, and the cartilage structure of a pig ear is less delicate than that of a human ear. Furthermore, the blood vessel wall structure differs from that of human skin tissue, making it difficult to reproduce blood leakage behavior. In addition, pig ears require refrigeration, and even with refrigeration, there is still a risk of spoilage.

[0006] Currently, in medical teaching that uses ear models to simulate ear acupuncture bloodletting, pig ear models are used for cost-effectiveness, while 3D-printed minimally invasive models are used for more accurate teaching. However, in teaching, 3D-printed minimally invasive models are slow to print, cannot simulate the soft and elastic skin of the human body, and are expensive; pig ears have even worse simulation performance and sometimes fail to accurately represent ear acupuncture bloodletting.

[0007] Based on this, the inventor designed a medical ear model for simulating ear acupuncture and bloodletting, which can not only reproduce ear acupuncture and bloodletting well, but also has a feel close to that of a human ear, and is low in cost. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a medical simulated ear acupuncture bloodletting model and its preparation method, thereby solving the technical problems of low simulation degree and high cost of existing 3D printed minimally invasive ear models.

[0009] The objective of this invention is achieved through the following technical solution: Firstly, this solution provides a medical model for simulating auricular bloodletting, including a blood bag and an ear-like silicone outer layer; The blood bag has an oval-shaped capsule-shaped soft shell, inside which is filled viscous simulated blood. A thin silicone layer is formed on the outer layer of the capsule soft shell by pouring silicone solution. The thickness standard of the thin silicone layer is that the thin silicone layer can deform and form tiny cracks under external pressure. The ear-like silicone is formed by casting a silicone solution through a corresponding mold. A groove is made in the ear acupoint of the imitation ear silicone. After the blood bag is placed in the groove, a layer of silicone liquid is applied to the outside of the blood bag to completely cover the groove - forming a semi-transparent covering silicone. When the ear acupoint of the entire model is squeezed by external force, the soft outer shell of the capsule breaks, and simulated blood gradually seeps out through the tiny gaps in the thin silicone layer—forming microvascular-like structures. This simulates the action of using a syringe to pierce through the translucent silicone covering and insert into the tiny gaps in the thin silicone layer—simulating the action of bleeding from the tiny blood vessels in the ear acupoint.

[0010] Furthermore, after the model completes a simulated bloodletting action from tiny blood vessels in the ear acupoint, the silicone covering can be peeled off with a knife, the ruptured blood bag can be removed, a new blood bag can be inserted, and a layer of silicone liquid can be applied to form a new silicone covering.

[0011] Furthermore, the blood bag is formed by extracting the contents of a vitamin E soft capsule with a syringe and then injecting it with simulated blood.

[0012] Secondly, a method for preparing a medical simulated auricular bloodletting model is also provided, characterized by the following steps: S1. Preparation of blood bags; a1. Select commercially available vitamin E soft capsules, use a syringe to extract the contents of the capsule, leaving the soft outer shell; then use a syringe to inject simulated blood into the soft outer shell of the capsule. b1. Prepare the silicone solution and apply it to the surface of the capsule shell containing simulated blood at room temperature; after 1.5h~2h, that is, before the silicone is completely cured, clamp the two ends of the silicone with clips and pull it outward along the two ends with a pulling range of less than 0.5cm, and use a bracket to fix the clips at both ends. Place the stent containing the blood bag in an oxygen plasma cleaner for 1-3 minutes, then remove it. c1. After the thin silicone on the blood bag has completely hardened, remove the clamps and take off the blood bag; tiny capillary-like cracks can form on the surface of the blood bag; S2, Preparation of silicone ear-like material; Prepare the silicone solution in a container, place the ear-shaped model in the container; after it has completely solidified, remove the excess silicone, keeping the silicone in the ear model – this is the ear-proof silicone. S3, Embedded; Make a groove in the ear canal of the silicone ear implant to accommodate the blood bag; apply Vaseline to the groove and place the blood bag inside; then brush a layer of silicone solution on the outside of the blood bag, covering the entire outside of the groove, and wait for the silicone solution to solidify to form a flipped silicone.

[0013] Furthermore, in S2, 100 ml of silicone solution and 2 ml of curing agent are used when preparing the ear-like silicone.

[0014] Furthermore, the capsule containing simulated blood has an oval shell measuring 1cm x 0.5cm, and the groove at the ear acupoint of the simulated ear silicone is 1cm x 0.5cm in size.

[0015] Furthermore, in step S2, after the artificial ear silicone is prepared, a yellow pigment is added to the silicone solution and applied to the surface of the artificial ear silicone to form an artificial ear silicone that is close to human skin color.

[0016] The present invention has the following advantages: (1) Not only is the preparation cost low, but the silicone ear-like material can also be reused in actual use; Specifically, it does not require expensive 3D printing equipment or special materials; it can be made using general-purpose silicone (molding silicone). The modular blood bag design means that the model does not need to be discarded after the blood is depleted; it can be reused simply by replacing the blood bag, which greatly reduces long-term teaching costs. (2) The simulation of auricular blood vessels is highly realistic, and the overall model has a high degree of realism, which improves the effect of medical teaching. Compared to 3D printed models, the soft capsule blood bag in this solution has elasticity and softness of thin silicone layer, giving it a realistic skin-like rebound feel when squeezed and a realistic sense of resistance when blood flows out, thus solving the unrealistic feeling of traditional models that are "hard" or "plastic". In particular, the thin silicone layer of this solution forms cracks that look very much like the blood vessels of ear acupoints. When the ear acupoints are squeezed, the simulated blood flows out from the cracks in the thin silicone layer. When viewed through the covering silicone layer, it looks very much like the blood vessels of real ear acupoints, thus facilitating medical teaching of "ear acupoint bloodletting". By simulating real bleeding and exudation processes, medical staff can practice procedures in an extremely realistic environment. Compared to simply seeing acupoint models, this "dynamic behavior" simulation greatly shortens the translation time from "theory" to "clinical practice," improving the safety and success rate of clinical procedures. Attached Figure Description

[0017] Figure 1 This is a diagram illustrating the pouring of liquid silica gel into a container. Figure 2 A schematic diagram for measuring a fixed amount of curing agent; Figure 3 This is a diagram showing the pouring of silicone solution into a container and the placement of an ear model (which is a hard solid made of plastic with petroleum jelly coating on the surface). Figure 4 To prepare a silica gel solution with a yellow pigment; Figure 5 A schematic diagram of embedding a blood pack in the silicone implant of an ear; Figure 6 A schematic diagram illustrating the application of silicone solution to the surface of a blood pack in the silicone groove of an artificial ear to form a silicone coating; Figure 7 This is an experiment to simulate the medical practice of "ear acupuncture bloodletting". Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0019] In this specific embodiment, a medical model for simulating auricular bloodletting is provided, including a blood bag and an ear-like silicone outer layer; Among them, the blood bag has an oval-shaped capsule soft shell, which contains viscous simulated blood. A thin silicone layer is formed on the outer layer of the capsule soft shell by pouring silicone solution. The thickness standard of the thin silicone layer is that it can deform and form tiny cracks under external pressure. Among them, the ear-like silicone is formed by casting a silicone solution through a corresponding mold; Furthermore, a groove is made at the ear acupoint of the imitation ear silicone. After placing the blood bag in the groove, a layer of silicone liquid is applied to the outside of the blood bag to completely cover the groove, forming a semi-transparent covering silicone.

[0020] It should be noted that the blood bag is formed by extracting the contents of a vitamin E soft capsule with a syringe and then injecting it with simulated blood.

[0021] When the model is at rest, the blood is completely sealed inside the blood capsule, and the surface of the ear acupoint is smooth.

[0022] When the model performs the extrusion action, such as Figure 7As shown, in medical teaching, when it is necessary to simulate ear acupuncture bloodletting: the operator uses tweezers or fingers to squeeze the ear acupuncture point. Due to the low hardness of the outer silicone layer, it will deform under force. At this time, the soft outer shell of the capsule breaks, the thin silicone layer is compressed and thinned, and the cracks become larger. Simulated blood gradually seeps out through the tiny gaps - forming microvascular-like structures. The simulated ear acupuncture point is simulated by inserting a syringe through the translucent silicone covering into the tiny gaps of the thin silicone layer - simulating the action of bloodletting from the tiny blood vessels of the ear acupuncture point (the model of this scheme can simulate the blood vessels at the ear acupuncture point of the human ear quite well).

[0023] When the pressure is released, the outer silicone layer returns to its original shape, but blood remains on the surface of the ear acupoint. Over time, the blood begins to coagulate, forming a scab.

[0024] After each lesson: use a knife to peel off the silicone covering, remove the ruptured blood bag, then insert a new blood bag and apply a layer of silicone liquid to form a new silicone covering.

[0025] It should be noted that the ear-like model used is highly durable and can be reused. When using it, the blood bag is replaced as needed (simply cut open the old blood bag, remove it, insert a new blood bag, cover with silicone, and allow it to solidify); there is no need to recast the entire model.

[0026] The preparation method of this medical simulated auricular bloodletting model is as follows, including the following steps: S2. Preparation of blood bags: a1. Select soft capsules (approximately 0.5 x 1 cm oval) with a soft outer shell, such as those containing Vitamin E. Use a syringe to extract the internal oil (but it is recommended to retain a very small amount, such as 0.1 ml, to maintain the shell's elasticity and prevent it from becoming too brittle); inject finished arterial blood (or homemade simulated blood; simulated blood cannot be made with pure water, but can be made by mixing ultrasonic coupling agent or protective cream with water and adding red pigment to more closely resemble the viscosity and appearance of real blood) into the capsule, ensuring it is full; b1. Prepare the silicone solution and apply it to the surface of the capsule shell containing simulated blood at room temperature; after 1.5h~2h, that is, before the silicone is completely cured, clamp the two ends of the silicone with clips and pull it outward along the two ends with a pulling range of less than 0.5cm, and use a bracket to fix the clips at both ends. Place the stent containing the blood bag in an oxygen plasma cleaner for 1-3 minutes, then remove it. c1. After the thin silicone on the blood bag has completely hardened, remove the clamps and take off the blood bag; tiny capillary-like cracks can form on the surface of the blood bag.

[0027] S2, Preparation of silicone ear-like material; like Figure 1 and Figure 2 As shown, first prepare the appropriate silicone solution: Pour 100ml of the appropriate amount of silicone raw material liquid into a clean container, add 2ml of curing agent (any industry-standard curing agent will do), and then stir slowly and evenly clockwise. The action should be gentle to minimize the entry of air and prevent the formation of bubbles. like Figure 3 As shown, molding: Pour the prepared solution into another container and place the ear-shaped model coated with Vaseline into the container; after 4 hours, once it has completely solidified, remove the excess silicone and retain the silicone in the ear model - forming the preliminary imitation ear silicone. like Figure 4 As shown, color adjustment: Prepare a new silicone solution and add yellow pigment (or flesh-colored pigment). Apply the silicone solution with yellow pigment to the surface of the preliminary imitation ear silicone. After 2 hours, it will solidify completely to form the final imitation ear silicone.

[0028] S3, Embedded; like Figure 5 As shown, a groove of approximately 0.5*1cm is precisely carved into the ear cavity of the silicone ear implant (this size is consistent with the size of the soft capsule shell, so that there is slight compression when the blood bag is inserted). like Figure 6 As shown, apply Vaseline to the groove (applying Vaseline to the outer layer makes demolding easier). First, gently insert the blood bag into the groove and press the surface of the blood bag firmly with tweezers to ensure that the surface of the blood bag is flat and adhered. Then, use a syringe to draw a small amount of silicone solution to cover the blood bag and let it stand for 1 hour to solidify. like Figure 6 As shown, then brush a layer of silicone solution onto the outside of the blood bag, allowing the silicone solution to cover the entire outside of the groove. After the silicone solution solidifies, it forms a flipped silicone.

[0029] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. A medical model for simulating auricular bloodletting, characterized in that: Including blood bags and an artificial ear silicone outer layer; The blood bag has an oval-shaped capsule-shaped soft shell, inside which is filled viscous simulated blood. A thin silicone layer is formed on the outer layer of the capsule soft shell by pouring silicone solution. The thickness standard of the thin silicone layer is that the thin silicone layer can deform and form tiny cracks under external pressure. The ear-like silicone is formed by casting a silicone solution through a corresponding mold. A groove is made in the ear acupoint of the imitation ear silicone. After the blood bag is placed in the groove, a layer of silicone liquid is applied to the outside of the blood bag to completely cover the groove - forming a semi-transparent covering silicone. When the ear acupoint of the entire model is squeezed by external force, the soft outer shell of the capsule breaks, and simulated blood gradually seeps out through the tiny gaps in the thin silicone layer—forming microvascular-like structures. This simulates the action of using a syringe to pierce through the translucent silicone covering and insert into the tiny gaps in the thin silicone layer—simulating the action of bleeding from the tiny blood vessels in the ear acupoint.

2. The medical simulated auricular bloodletting model according to claim 1, characterized in that: After the model completes a simulated bloodletting action from tiny blood vessels in the ear acupoint, the silicone covering can be peeled off with a knife, the ruptured blood bag can be removed, a new blood bag can be inserted, and a layer of silicone liquid can be applied to form a new silicone covering.

3. The medical simulated auricular bloodletting model according to claim 1, characterized in that: The blood bag is formed by extracting the contents of a vitamin E soft capsule with a syringe and then injecting it with simulated blood.

4. The method for preparing a medical simulated auricular bloodletting model as described in any one of claims 1 to 3, characterized in that: Includes the following steps: S1. Preparation of blood bags; a1. Select commercially available vitamin E soft capsules, and use a syringe to extract the contents of the capsule, leaving the soft outer shell; Simulated blood is injected into the soft outer shell of the capsule using a syringe; b1. Prepare the silicone solution and apply it to the surface of the capsule shell containing simulated blood at room temperature; After 1.5h to 2h, that is, before the silicone is completely cured, clamp the two ends of the silicone with clips and pull it outward along the two ends. The pulling range is less than 0.5cm. Use the bracket to fix the clips at both ends. Place the stent containing the blood bag in an oxygen plasma cleaner for 1-3 minutes, then remove it. c1. After the thin silicone on the blood bag has completely hardened, remove the clamps and take off the blood bag; tiny capillary-like cracks can form on the surface of the blood bag; S2, Preparation of silicone ear-like material; Prepare the silicone solution in a container, place the ear-shaped model in the container; after it has completely solidified, remove the excess silicone, keeping the silicone in the ear model – this is the ear-proof silicone. S3, Embedded; Make a groove in the ear acupoint of the imitation ear silicone (the picture shows an ear acupoint as an example) to accommodate the blood bag; apply Vaseline to the groove and put the blood bag into the groove; then brush a layer of silicone solution on the outside of the blood bag, so that the silicone solution covers the entire outside of the groove. After the silicone solution solidifies, it forms an inverted silicone.

5. The method for preparing a medical simulated auricular bloodletting model according to claim 4, characterized in that: In step S2, 100 ml of silicone solution and 2 ml of curing agent are used when preparing the silicone ear-like material.

6. The method for preparing a medical simulated auricular bloodletting model according to claim 4 or 5, characterized in that: The capsule containing simulated blood has an oval shell measuring 1cm x 0.5cm, and the groove at the ear acupoint of the simulated ear silicone is 1cm x 0.5cm in size.

7. The method for preparing a medical simulated auricular bloodletting model according to claim 4, characterized in that: In step S2, after the artificial ear silicone is prepared, a yellow pigment is added to the silicone solution and applied to the surface of the artificial ear silicone to form an artificial ear silicone that is close to human skin color.

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