JP2005221574A - Blood vessel model and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood vessel model with which high level training for the operation of a catheter can be performed. <P>SOLUTION: Simulated blood vessels 14 are made bendable and elastic. Therefore, when external force is applied to the simulated blood vessel 14, the simulated blood vessel 14 is deformed in accordance with the applied external force. Thus, a trainee, who is going to conduct the training of the operation of a catheter 16, can conduct the training of the catheter 16 using the deformed simulated blood vessel 14. Since the simulated blood vessel 14 deforms, repulsive force which is close to the force being felt when the catheter 16 is inserted into an actual blood vessel, is applied to the trainee and the trainee can conduct high level training for the operation of the catheter 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vascular model and a manufacturing method thereof.

  Catheters are used to examine and treat a patient's circulatory system, particularly in the vicinity of the head and heart. As a specific example, when imaging a heart or a blood vessel using X-rays, for example, a catheter is inserted into the blood vessel, and a contrast agent is injected through the catheter. Further, when removing the thrombus, a catheter is inserted into the blood vessel, and the thrombus is injected by this catheter to dissolve the thrombus, or the thrombus is sucked by the catheter. Thus, the catheter is used for various uses in the examination and treatment of the circulatory system.

  The catheter is inserted into a blood vessel from a portion where the blood vessel is located near the body surface, such as the base of the lower limb and the wrist of the upper limb, by a manual operation of a doctor. Further, the catheter is gradually inserted by a doctor's manual operation until the tip reaches the target position. Thus, the catheter must be inserted into the blood vessel by the manual operation of the physician. When inserting a catheter into a blood vessel, a doctor who operates the catheter requires a high degree of skill in the operation so as not to damage the blood vessel, such as damaging the inner surface of the blood vessel or perforating the blood vessel.

  A typical conventional technique is described in Non-Patent Document 1. FIG. 9 is a front view showing the practice device 1 for practicing the operation of the catheter of the prior art described in Non-Patent Document 1. In order to use a catheter, as described above, a doctor must have a high level of skill, so the practicing device 1 is used for the doctor to practice the operation of the catheter. A Swiss-made device is known as the training device 1, and the training device 1 is a massive body having rigidity, and is formed with a hole 2 that is shaped like a blood vessel.

  In manufacturing the training device 1, first, a blood vessel is taken out of the dead human body. Next, the taken blood vessel is placed in a container, and a region outside the blood vessel in the container is filled with a synthetic resin material and solidified. Then, the blood vessel is dissolved and removed using, for example, a medicine. In this way, the lump training device 1 in which the hole 2 that represents the blood vessel is formed is manufactured.

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  The practice device 1 of the prior art is a rigid lump body in which a hole 2 representing a blood vessel is formed, and when the catheter is inserted into the hole 2, it does not deform like an actual blood vessel. The reaction force to the doctor practicing the operation is different from the reaction force when inserting into an actual blood vessel. Therefore, advanced practice cannot be performed.

  Further, in the conventional technique, the blood vessel taken out from the human body of the dead must be used when manufacturing the practice device 1. In such a manufacturing method, the practice apparatus 1 cannot be manufactured because it is prohibited by law in Japan. Moreover, since it is difficult to obtain blood vessels taken out from the human body of the dead and labor is required for manufacturing, the training apparatus 1 becomes expensive.

  Accordingly, an object of the present invention is to provide a vascular model capable of performing advanced practice of catheter operation.

  It is another object of the present invention to provide a method for manufacturing a vascular model that can be manufactured easily and inexpensively without using a blood vessel taken out from a dead human body.

  The present invention is a vascular model characterized by including a tubular simulated vasculature having flexibility and elasticity and simulating a vascular vessel.

  According to the present invention, the simulated vessel is flexible and resilient. Therefore, when an external force is applied to the simulated vessel, the simulated vessel is deformed based on the applied external force. Thus, a practitioner who practices the operation of the catheter can practice the operation of the catheter using the deformed simulated vessel. Since the simulated vessel deforms, a reaction force close to that when the catheter is inserted into the actual vessel acts on the practitioner. Therefore, the practitioner can perform advanced practice of the operation of the catheter. Thus, even if a catheter is inserted into an actual vessel, the practitioner can learn a technique that can perform a desired treatment without damaging the vessel. It is possible to reduce human-induced accidents that damage the vascularity caused by the catheter.

  According to the present invention, the simulated vessel is characterized in that mechanical properties including the flexibility and elasticity are substantially the same as the mechanical properties of the vessel.

  According to the present invention, the simulated vessel has substantially the same mechanical properties as the vessel, including the flexibility and elasticity. As a result, when the practitioner practices using the vascular model, a reaction force substantially the same as the reaction force when inserting the catheter into the vessel is applied. This allows the practitioner to experience the feeling of inserting the catheter into the vessel. Therefore, more advanced practice can be performed.

Furthermore, the present invention is characterized in that the simulated vessel has a shape imitating a vessel.
According to the present invention, the simulated vessel has a shape that is similar to a vessel. Accordingly, the simulated vessel has substantially the same shape as the vessel. The practitioner can practice the operation of the catheter using a simulated vessel having substantially the same shape as the vessel. This allows more advanced practice.

Furthermore, the present invention further includes a support that supports the simulated vessel in a state substantially the same as the natural state,
A storage space capable of storing liquid is formed in the support,
The support is characterized in that the simulated vessel is arranged and supported in the storage space.

  According to the present invention, it further includes a support that supports the simulated vessel in a state that is substantially the same as the natural state. Therefore, it can be supported in a state where an undesired external force does not act on the simulated vessel. The support body is formed with a storage space capable of storing liquid, and supports the simulated vasculature in the storage space. Therefore, the liquid can be stored in the storage space, and the environment around the simulated vessel can be filled with the stored liquid. As a result, buoyancy acts on the simulated vessel due to the stored liquid. By acting on the buoyancy, the simulated vessel can be supported in a state similar to the vessel. This allows the practitioner to practice in a state similar to that of the vascular vessel.

Furthermore, the present invention provides a core mold forming step of forming a core mold with a linear body,
A fluidized layer forming step of forming a tubular fluidized layer covering the core mold by a fluidized layer material that fluidizes when a predetermined fluidized condition is satisfied;
A simulated angioplasty step of forming a tubular simulated vessel covering the fluidized layer with a flexible and resilient simulated vascular material;
A method of manufacturing a vascular model, comprising: fluidizing a fluidized bed to flow out of a simulated vessel, and removing a core mold from the simulated vessel.

  According to the present invention, the fluidized bed is fluidized and flows out of the simulated vessel, so that the core mold and the simulated vessel are arranged at an interval. Therefore, the core mold can be easily taken out from the simulated vessel. Further, when the core mold is taken out from the simulated vessel, the possibility that the core mold contacts the simulated vessel and is damaged can be reduced. Since the vascular model is formed in this way, a tubular simulated vascular vessel having flexibility and elasticity can be formed. Therefore, a vascular model can be manufactured without manufacturing using the blood vessel taken out from the human body of the dead. As a result, the vascular model can be easily manufactured. In addition, the vascular model can be manufactured at low cost.

Further, in the present invention, the core mold has a plurality of core members divided in the axial direction,
The fluidizing layer forming step is characterized in that the fluidizing layer is formed so as to cover the core members in common in a state where the core members are arranged.

  According to the present invention, in a state where the core members are arranged, the fluidized layer is formed so as to cover the core members in common. When the core mold is complicated, the core mold may not be smoothly removed from the simulated vessel when the core mold is removed from the simulated vessel in the removal step. Since the core mold has a plurality of core members divided in the axial direction, the core mold can be prevented from being caught inside the simulated vessel and can be taken out smoothly. This facilitates the work of taking out. Further, in the removing process, the possibility that the core mold damages the simulated vessel can be reduced.

Furthermore, the present invention, in producing a vascular model of a vascular having a plurality of vascular parts connected to each other,
In the core mold forming step, the linear bodies corresponding to the respective vascular portions are bound together at positions corresponding to the connection portions of the respective vascular portions, and the core bodies are formed by deforming the respective linear bodies. And

  According to the present invention, the linear bodies corresponding to the respective vascular portions are bound to each other at positions corresponding to the connection portions of the respective vascular portions, and the respective linear bodies are deformed to form the core shape. Therefore, it is possible to easily form a core shape corresponding to the vascular portion, rather than deforming each linear body corresponding to each vascular portion separately and then binding each linear body. Thereby, work efficiency can be improved.

  Furthermore, the present invention is characterized in that in the simulated blood vessel forming step, a simulated blood vessel is formed by spirally winding a strip-shaped simulated blood vessel material made of a simulated blood vessel material.

  According to the present invention, a simulated vascular material is formed by spirally winding a strip-shaped simulated vascular material made of a simulated vascular material. Since the simulated vascular material is spirally wound, the fluidized layer can be easily covered. Further, the thickness dimension of the simulated vascular material can be selected by selecting the thickness dimension of the simulated vascular material. This improves work efficiency.

  Furthermore, the present invention is characterized in that, in the simulated blood vessel forming step, the simulated blood vessel material is wound after the liquid simulated blood vessel material is applied to the outer surface of the fluidized layer.

  According to the present invention, after the liquid simulated vascular material is applied to the outer surface of the fluidized layer, the simulated vascular material is wound. Since the liquid simulated vascular material is applied, a layer made of the simulated vascular material can be formed on the outer surface of the fluidized layer. Since the simulated vascular material is made of a simulated vascular material, the applied simulated vascular material is the same. Therefore, the bonding force between the simulated vascular material and the layer made of the simulated vascular material is large. As a result, the simulated vascular material is wound around the fluidized bed and can be reliably covered without falling off. As a result, the working efficiency of the simulated angiogenesis step can be improved.

  According to the present invention, a practitioner can perform advanced practice of catheter operation. Thus, even if a catheter is inserted into an actual vessel, the practitioner can learn a technique that can perform a desired treatment without damaging the vessel. It is possible to reduce human-induced accidents that damage the vascularity caused by the catheter.

  Further, according to the present invention, the practitioner can experience the feeling when inserting the catheter into the vessel. Therefore, more advanced practice can be performed.

  Further, according to the present invention, the practitioner can practice the operation of the catheter using a simulated vessel having substantially the same shape as the vessel. This allows more advanced practice.

  According to the present invention, the support can support the simulated vessel in a state similar to that of the vessel. This allows the practitioner to practice in a state similar to that of the vascular vessel.

  Moreover, according to this invention, a vascular model can be manufactured, without manufacturing using the blood vessel taken out from the dead human body. As a result, the vascular model can be easily manufactured. In addition, the vascular model can be manufactured at low cost.

  Moreover, according to this invention, it can prevent getting caught inside the simulated blood vessel, and can take out smoothly. As a result, the work to be taken out can be facilitated. Further, in the removing process, the possibility that the core mold damages the simulated vessel can be reduced.

  Further, according to the present invention, a core mold corresponding to the vascular portion can be easily formed. Thereby, work efficiency can be improved.

  Moreover, according to this invention, since the simulated vascular material is wound helically, the fluidized layer can be easily covered. This improves work efficiency.

  Further, according to the present invention, the simulated vascular material can be wound around the fluidized layer and reliably covered without falling off. As a result, the working efficiency of the simulated angiogenesis step can be improved.

  FIG. 1 is a perspective view showing a vascular model 10 according to an embodiment of the present invention. FIG. 2 is a head blood vessel model 13 showing the blood vessel 12 of the human head. In FIG. 1, the support 11 is virtually shown for easy understanding. The vascular model 10 includes a simulated vascular vessel 14, a support 11, and a connecting tube 15. The vascular model 10 is used, for example, to practice the operation of the catheter 16.

  The simulated vessel 14 is tubular and simulates a vessel. A blood vessel is a tube through which a body fluid passes in the body of an animal including a human being, for example, a blood vessel 12 and a lymph vessel. In the present embodiment, the blood vessel to be simulated is a blood vessel 12 at the head of a human body as shown in FIG.

  The simulated blood vessel 14 has a shape simulating a blood vessel. The simulated blood vessel 14 has flexibility and elasticity. More preferably, the simulated vessel 14 has substantially the same mechanical characteristics including the flexibility and elasticity as the mechanical property of the vessel to be simulated. In the present invention, the term “substantially identical” includes the same. Mechanical properties are, for example, tensile strength, compressive strength, bending strength, impact strength, hardness, elastic modulus and elongation. The mechanical characteristics of the simulated vessel 14 and the mechanical characteristics of the simulated vessel are the reaction force applied to the trainee by the simulated vessel when the practitioner inserts the catheter 16 into the simulated vessel 14, and The reaction force applied to the practitioner by the vessel when the practitioner inserts the catheter 16 into the simulated vessel is selected to be substantially the same. For example, when the practitioner inserts the catheter 16 into the simulated vessel 14, the reaction force applied to the practitioner by the simulated vessel is determined by the vessel when the practitioner inserts the catheter 16 into the simulated vessel. The ratio is 10% or less with respect to the reaction force applied to.

  The simulated vessel 14 is made of a simulated vessel material having flexibility and elasticity. The simulated vascular material is, for example, a synthetic resin. More specifically, the simulated vascular material is a silicone resin. The silicone resin includes silicone rubber.

  The simulated blood vessel 14 is preferably formed so as to have translucency. The simulated vessel 14 is made of, for example, a colorless and transparent material. Colorless means a color in which the transmittance in all wavelength components in the visible light region is substantially uniform (including uniform). Furthermore, the transparent means that the light is transmitted without being irregularly reflected, and when the thickness is uniform, a transparent color whose shape is clear when the object on the opposite side is visually confirmed.

  The support 11 supports the simulated blood vessel 14 in a state substantially the same as the natural state. In the present invention, the natural state is a state in which only gravity based on its own weight acts on the simulated vessel 14. Therefore, it is possible to support the simulated vessel 14 in a state where an undesired external force, for example, a tensile force in the axial direction of the simulated vessel 14 does not act. A storage space 18 capable of storing a liquid is formed in the support 11. The support 11 is formed, for example, in a bottomed rectangular tube shape. Therefore, the support 11 can store the liquid in the storage space 18 and fill the environment around the simulated vessel 14 with the stored liquid. Further, the support 11 supports the simulated blood vessel 14 disposed in the storage space 18. The simulated blood vessel 14 is supported, for example, by connecting both end portions 19 in the axial direction to the inner wall portion 20 of the support 11. The position at which both ends 19 in the axial direction of the simulated blood vessel 14 are connected is selected so as to have substantially the same positional relationship as the simulated blood vessel. In the present embodiment, since the blood vessel 12 of the human head is simulated, the simulated blood vessel 14 is arranged so as to have substantially the same positional relationship as the blood vessel 12 of the human head.

  In addition, the support body 11 has a plurality of through holes 22 formed through the wall portion 21 in the thickness direction. Each through-hole 22 is formed at a position corresponding to a position where both axial end portions 19 of the simulated blood vessel 14 are connected to the inner wall portion 20 of the support 11. Specifically, the axial line of the through hole 22 and the simulated blood vessel 14 are arranged so as to be substantially the same. The cross-sectional shape perpendicular to the axial direction of the through-hole 22 is formed substantially the same as the cross-sectional shape perpendicular to the axial direction of the simulated blood vessel 14. Therefore, both axial end portions 19 of the simulated blood vessel 14 are inserted into the space outside the support 11 through the through holes 22.

  The support 11 is made of, for example, a synthetic resin, and in the present embodiment, is made of an acrylic resin. The support 11 is preferably formed so as to have translucency. The support 11 is made of, for example, a colorless and transparent material.

  The connecting pipe 15 has a cylindrical shape, and one end 23 in the axial direction thereof is connected to the position of the through hole 22 formed in the support 11. The connecting pipe 15 is coupled to the through hole 22 in a sealed state. As a result, when the liquid flows through the simulated blood vessel 14, the liquid flows through the through hole 22 without leaking into the connection tube 15. The other end of the connecting pipe 15 in the axial direction is connected to, for example, a tank that stores liquid. As a result, for example, a liquid that flows into the vascular vessel, for example, blood that is substantially the same as the blood, can flow through the simulated vessel 14.

  FIG. 3 is an enlarged cross-sectional view showing a part of the simulated blood vessel 14. When the practitioner inserts the catheter 16 into the simulated blood vessel 14, the distal end portion 17 of the catheter 16 contacts the inner surface 24 of the simulated blood vessel 14. Since the simulated blood vessel 14 has flexibility and elasticity, when the distal end portion 17 of the catheter 16 comes into contact with the inner surface 24, the simulated blood vessel 14 is indicated by an imaginary line based on a force applied from the distal end portion 17 of the catheter 16. It deforms as follows.

  As described above, when the simulated blood vessel 14 has translucency, when the practitioner inserts the catheter 16 into the simulated blood vessel 14, the state of the catheter 16 such as the position of the distal end portion 17 of the catheter 16 is determined. It can be grasped from the outside of the tube 14. Therefore, the practitioner can practice the operation of the catheter 16 based on the vision and the reaction force from the catheter 16. Thus, the practitioner can practice advanced operation of the catheter 16.

  Since the simulated vessel 14 is supported by the support 11 as described above, buoyancy acts on the simulated vessel 14 by the stored liquid when the storage space 18 is filled with the liquid. Therefore, the support 11 can support the simulated vessel 14 in a state similar to the vessel, in other words, in a state similar to the state inside the animal. Thus, the practitioner can practice using the vascular model 10 in a state similar to a vascular vessel.

  Further, as described above, both end portions 19 in the axial direction of the simulated blood vessel 14 are inserted into the space outside the support 11 through the through holes 22. Therefore, when the practitioner inserts the catheter 16 into the through hole 22 from the through hole 22 of the wall portion 21 of the support 11, the practitioner can insert it into the simulated blood vessel 14 connected to the through hole 22.

  Further, as described above, the support 11 has translucency. When the support body 11 has translucency, the simulated blood vessel 14 can be visually recognized from the outside of the support body 11. Therefore, when the simulated blood vessel 14 is made of a light-transmitting material as described above, the practitioner inserts the catheter 16 into the simulated blood vessel 14 and the position of the catheter 16 such as the position of the distal end portion 17 of the catheter 16. The situation can be grasped from outside the simulated vessel 14. Therefore, the same effect as described above can be obtained. For the same reason, the liquid to be stored is preferably a colorless and transparent liquid such as water. As a result, the same effect as described above can be obtained.

  Further, as described above, the simulated blood vessel 14 can be supplied with substantially the same liquid as that flowing through the blood vessel. Therefore, a state more similar to a vessel can be reproduced using the simulated vessel 14. Thus, the practitioner can practice the operation of the catheter 16 using the simulated blood vessel 14 in which the liquid is flowing.

  As shown in FIG. 3, the practitioner can practice the operation of the catheter 16 using the deformed simulated blood vessel 14. As described above, since the mechanical characteristics of the simulated vessel 14 are substantially the same as the mechanical characteristics of the simulated vessel, the reaction force when the catheter 16 is inserted into the simulated vessel is substantially the same. The reaction force of acts. This allows the practitioner to experience the feeling of inserting the catheter 16 into the vessel. Therefore, more advanced practice can be performed. Accordingly, even if the catheter 16 is inserted into an actual vessel, the practitioner can learn a technique that can perform a desired treatment without damaging the vessel. A man-made accident that damages the blood vessel caused by the catheter 16 can be reduced.

  Moreover, since the simulated vascular material is a silicone resin, it is possible to form the simulated vascular vessel 14 having substantially the same mechanical characteristics as the mechanical characteristics of the vascular to be simulated.

  FIG. 4 is a flowchart showing a method for manufacturing the vascular model 10. In step a0, a model showing the shape of the simulated blood vessel is prepared, and the process proceeds to step a1. In step a1, a core forming process is performed, and the process proceeds to step a2. The core mold forming step is a step of forming a core mold with a linear body. The linear body is plastically deformable. The linear body is, for example, a wire, and the dimension perpendicular to the axial direction of the linear body is set smaller than the dimension perpendicular to the axial direction of the simulated blood vessel. The linear body is made of, for example, aluminum (Al). The core mold is formed in a shape that is similar to a vessel to be simulated. In step a2, a fluidized layer forming process is performed, and the process proceeds to step a3. The fluidized layer forming step is a step of forming a tubular fluidized layer covering the core mold with the fluidized layer material. The fluidized layer material is a material that fluidizes when a predetermined fluidization condition is satisfied. The fluidization condition is, for example, heating to the melting point of the fluidized layer material.

  In step a3, a simulated angiogenesis step is performed, and the process proceeds to step a4. The simulated vessel forming step is a step of forming a tubular simulated vessel 14 covering the fluidized layer with a simulated vessel material. When the simulated vessel 14 is formed, for example, the simulated vessel 14 is formed by applying a liquid simulated vessel material using a brush or the like. The simulated vascular material is a material having flexibility and elasticity. The simulated vascular material is, for example, a synthetic resin, and in this embodiment, is a silicone resin.

  In step a4, a removal process is performed, and the process proceeds to step a5. The removing step is a step of fluidizing the fluidized bed to flow out of the simulated vessel 14 and taking out the core mold from the simulated vessel 14.

  In step a5, the formed simulated blood vessel 14 is connected to the support 11 as described above, the blood vessel model 10 is manufactured, and the manufacturing method of the series of blood vessel models 10 from step a0 is completed. Therefore, the simulated blood vessel 14 having flexibility and elasticity can be formed. In addition, a simulated blood vessel 14 representing a blood vessel can be formed.

  In step a3, it is preferable that the thickness dimension of the simulated vessel 14 is a dimension that can obtain substantially the same mechanical characteristics as the simulated vessel, for example, hardness. As a result, the simulated vessel 14 can obtain substantially the same mechanical characteristics as the simulated vessel.

  In step a4, the fluidized bed is fluidized and flows out of the simulated blood vessel 14, so that the core mold and the simulated blood vessel 14 are arranged at an interval. Therefore, the core mold can be easily taken out from the simulated vessel 14. Further, when the core mold is taken out from the simulated vessel 14, the possibility that the core mold contacts the simulated vessel 14 and is damaged can be reduced. In addition, since the vascular model 10 is formed as described above, the vascular model 10 can be manufactured without using a vascular vessel taken out from a dead human body. Thereby, the vascular model 10 can be manufactured easily. In addition, the vascular model 10 can be manufactured at low cost.

  FIG. 5 is a flowchart showing in detail a method for manufacturing the vascular model 10 of FIG. FIG. 6 is a cross-sectional view showing step by step the manufacturing process in the method for manufacturing the vascular model 10. In step b0, a model indicating the shape of the simulated blood vessel is prepared, and the process proceeds to step b1. In step b1, as shown in FIG. 6 (1), the manufacturer forms the core 26 of the vessel to be simulated using the linear body 25, and proceeds to step b2. .

  Step b2 is a fluidized layer forming step, in which the manufacturer applies a fluidized layer material to the core mold 26 and covers the core mold 26 as shown in FIG. 27 is formed, and the process proceeds to step b3. The fluidized layer material is, for example, a water-soluble adhesive, specifically a protein adhesive, and more specifically gelatin. The fluidizing condition of gelatin fluidizes when it reaches a predetermined temperature. The manufacturer applies the gelatin to the core mold 26 using, for example, a brush, and forms the fluidized layer 27.

  In step b3, as shown in FIG. 6 (3), the manufacturer applies a liquid simulated vascular material to the outer surface of the fluidized layer 27 and fluidizes it as shown in FIG. 6 (3). A tubular base layer 28 covering the layer 27 is formed, and the process proceeds to step b4. The simulated vascular material is, for example, a silicone resin, specifically a silicone sealant. The simulated vascular material is preferably a light-transmitting material. In step b4, which is a part of the simulated vascular formation process, as shown in FIG. 6 (4), the manufacturer spirals a strip-shaped simulated vascular material 29 made of the simulated vascular material on the foundation layer 28. Then, the process proceeds to step b5. In step b5, a liquid simulated vascular material is applied to the outer surface to form a tubular surface layer 33 that covers the simulated vascular material 29, and the process proceeds to step b6.

  In step b6, which is a part of the removal process, the manufacturer fluidizes the fluidized layer 27 to flow out of the simulated blood vessel 14, and proceeds to step b7. The fluidized layer 27 fluidizes when a predetermined fluidization condition is satisfied. As described above, since the fluidized layer material is, for example, gelatin, the fluidized layer 27 is fluidized by heating. In step b7, which is part of the removal process, as shown in FIG. 6 (5), the core die 26 is taken out from the simulated blood vessel 14, the simulated blood vessel 14 is formed, and the process proceeds to step b8. In step b8, the formed simulated blood vessel 14 is connected to the support 11 as described above, and the blood vessel model 10 is manufactured, and the series of methods for manufacturing the blood vessel model 10 from step b0 is completed.

  In step b2, the linear body 25 and the flow are arranged so that the sum of the dimension perpendicular to the axial direction of the linear body 25 and the thickness dimension of the fluidized layer 27 is substantially the same as the inner diameter of the vascular to be simulated. Preferably, the chemical layer 27 is selected. As a result, the simulated blood vessel 14 can obtain substantially the same inner diameter as the simulated blood vessel. The fluidized layer 27 is formed so that the cross-sectional shape perpendicular to the axial direction of the linear body 25 and the fluidized layer 27 is substantially the same as the cross-sectional shape perpendicular to the axial direction of the vessel to be simulated. preferable. As a result, the simulated blood vessel 14 can have substantially the same shape as the simulated blood vessel. When the simulated blood vessel is, for example, a blood vessel 12 on the head of a human body, the inner diameter of the blood vessel 12 is about 2 to 4 mm. Therefore, the inner diameter of the simulated blood vessel 14 is also formed to have a dimension approximately the same as the inner diameter of the blood vessel 12.

  Further, as described above, in step b4, the simulated vascular material 14 is formed by spirally winding the strip-shaped simulated vascular material 29 made of the simulated vascular material. Since the simulated vascular material 29 is spirally wound, the fluidized layer 27 can be easily covered. Further, by selecting the thickness dimension of the simulated vascular material 29, the thickness dimension of the simulated vascular vessel 14 can be selected. This improves work efficiency.

  Further, as shown in step b3 and step b4, after applying the liquid simulated vascular material to the outer surface of the fluidized layer 27, the simulated vascular material 29 is wound. Since the liquid simulated vascular material is applied, a layer made of the simulated vascular material can be formed on the outer surface of the fluidized layer 27. Since the simulated vascular material 29 is made of a simulated vascular material, it is the same as the applied simulated vascular material. Therefore, the bonding force between the simulated vascular material 29 and the layer made of the simulated vascular material is large. As a result, the simulated vascular material 29 is wound around the fluidized layer 27 and can be reliably covered without falling off. As a result, the working efficiency of the simulated angiogenesis step can be improved.

  Further, as shown in step b5 described above, after the simulated vascular material 29 is wound, the liquid simulated vascular material is applied to the outer surface thereof. Thereby, the outer surface of the simulated vascular material 29 can be smooth without any irregularities. When the simulated vascular material has translucency, the translucency of the simulated vascular vessel 14 can be improved by smoothing the outer surface of the simulated vascular material 29. Therefore, the practitioner can visually recognize the situation inside the simulated blood vessel 14 from the outside.

  The simulated vascular materials in steps b3 to b5 are the same as each other, but are not limited thereto. For example, the simulated vascular material used for the underlayer 28 and the simulated vascular material used for the simulated vascular material 29 may be different. As a result, the mechanical properties of the simulated blood vessel 14 can be changed to desired mechanical properties.

  FIG. 7 is an enlarged front view showing a part of the core die 26. When manufacturing a vascular vascular model 10 having a plurality of vascular parts connected to each other, the core 26 deforms each linear body 25 so as to correspond to each vascular part. For example, when the vessel to be simulated is branched and intersects, the core mold 26 is formed so that the linear body 25 branches and intersects.

  As shown in FIG. 7A, when the core mold 26 is formed, first, the linear bodies 25 corresponding to the vascular portions are bound to each other at positions 30 corresponding to the connection portions of the vascular portions. . As a method of binding, for example, a band 31 made of a fluidized layer material is used.

  Next, as shown in FIG. 7B, each linear body 25 is deformed so as to correspond to each vascular portion. Since each linear body 25 is bound, the manufacturer can easily deform each linear body 25 so as to correspond to each vascular portion. Thus, the core 26 corresponding to the vascular portion can be formed more easily than the method in which the respective linear members 25 are separately deformed so as to correspond to the respective vascular portions and then the linear bodies 25 are bound. Can do. Thereby, work efficiency can be improved.

  In addition, since the fluidized layer material is used for binding, the fluidized layer material can be fluidized in the removing step to release the binding. Therefore, when the core die 26 is taken out from the simulated blood vessel 14 in the removing step, it is possible to prevent problems such as the binding portion being caught. The strip 31 used for binding is not limited to a fluidized layer material, but may be a material that can be removed by a removal process, for example, an oblate made of starch.

  FIG. 8 is an enlarged cross-sectional view showing a state where the fluidized layer 27 is formed on the core die 26. The core mold 26 has a plurality of core members 32 divided in the axial direction. As shown in FIG. 8 (1), for example, when the axial direction of the linear body 25 intersects, and as shown in FIG. 8 (2), for example, when the radius of curvature of the axial line of the linear body 25 is small, The core die 26 is formed using the core member 32. In the core mold forming step, the core molds 26 are formed by arranging the core members 32 so as to correspond to the blood vessels to be simulated. In the fluidized layer forming step, the fluidized layer 27 is formed so as to cover the core members 32 in a state where the core members 32 are arranged.

  When the shape of the core mold 26 is complicated, the core mold 26 may not be smoothly removed from the simulated blood vessel 14 when the core mold 26 is removed from the simulated blood vessel 14 in the removal process. In the present embodiment, since the core mold 26 has a plurality of core members 32, it is possible to prevent the core member 32 from being caught inside the simulated blood vessel 14 by selecting the dimension of the core member 32 in the axial direction. As a result, the core die 26 can be smoothly removed from the simulated blood vessel 14. In addition, when the dimension of the core member 32 is small and it is difficult for the manufacturer to take out from the outside of the simulated vessel 14, the core member 32 is caused to flow out and taken out by flowing a liquid through the simulated vessel 14. Can do. Therefore, it can work easily. Further, in the removing process, the possibility that the core 26 damages the simulated blood vessel 14 can be reduced.

  As another method for forming the fluidized layer 27 in the fluidized layer forming step, the fluidized layer 27 is formed by spirally winding a belt-like fluidized layer material made of the fluidized layer material. Also good. Since the fluidized layer material is spirally wound, the core mold 26 can be easily covered. Moreover, the thickness dimension of the fluidized layer 27 can be easily selected by selecting the thickness dimension of the fluidized layer material. This improves work efficiency.

  In the present embodiment, the step of forming the blood vessel 12 of the head of the human body has been shown, but the present invention is not limited to this. For example, the simulated vessel may be a lymph vessel. The blood vessel 12 is not limited to the blood vessel 12 at the head, and may be a blood vessel 12 of another part, for example, the heart. Moreover, it is not limited to the blood vessels of the human body, but may be vessels of other animals such as dogs and cats.

1 is a perspective view showing a vascular model 10 according to an embodiment of the present invention. It is the head blood vessel model 13 which shows the blood vessel 12 of the head of a human body. FIG. 3 is an enlarged cross-sectional view showing a part of a simulated blood vessel 14. 4 is a flowchart showing a method for manufacturing the vascular model 10. It is a flowchart which shows the manufacturing method of the vascular model 10 of FIG. 4 in detail. 3 is a cross-sectional view showing steps of a manufacturing process in the method for manufacturing the vascular model 10. FIG. 3 is an enlarged front view showing a part of a core mold 26. FIG. 3 is an enlarged cross-sectional view showing a state in which a fluidized layer 27 is formed on a core mold 26. FIG. It is a front view which shows the practice apparatus 1 for practicing the operation of the catheter of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vascular model 11 Support body 14 Simulated blood vessel 16 Catheter 18 Storage space 25 Linear body 26 Core type 27 Fluidization layer 28 Underlayer 29 Simulated vessel material 32 Core member

Claims (9)

  A vascular model characterized by including a tube-like simulated vessel that has flexibility and elasticity and that simulates a vessel.   2. The vascular model according to claim 1, wherein the simulated blood vessel has mechanical characteristics including the flexibility and elasticity substantially the same as the mechanical characteristics of the blood vessel.   The vascular model according to claim 1 or 2, wherein the simulated vasculature has a shape simulating a vasculature. And further including a support that supports the simulated vessel in a state substantially the same as a natural state,
A storage space capable of storing liquid is formed in the support,
The vascular model according to any one of claims 1 to 3, wherein the support body supports the simulated vasculature in a storage space. A core mold forming step of forming a core mold with a linear body;
A fluidized layer forming step of forming a tubular fluidized layer covering the core mold by a fluidized layer material that fluidizes when a predetermined fluidized condition is satisfied;
A simulated angioplasty step of forming a tubular simulated vessel covering the fluidized layer with a flexible and resilient simulated vascular material;
A method for producing a vascular model, comprising: fluidizing the fluidized layer to flow out of the simulated vessel, and removing the core mold from the simulated vessel. The core mold has a plurality of core members divided in the axial direction,
6. The method for manufacturing a vascular model according to claim 5, wherein, in the fluidized layer forming step, the fluidized layer is formed so as to cover the core members in common in a state where the core members are arranged. In manufacturing a vascular model of a vascular vessel having a plurality of vascular parts connected to each other,
In the core mold forming step, the linear bodies corresponding to the respective vascular portions are bound together at positions corresponding to the connection portions of the respective vascular portions, and the core bodies are formed by deforming the respective linear bodies. The method for producing a vascular model according to claim 5 or 6.   The simulated blood vessel is formed in the simulated blood vessel forming step by spirally winding a strip-shaped simulated blood vessel material made of the simulated blood vessel material. Method for manufacturing the vascular model.   9. The method of manufacturing a vascular model according to claim 8, wherein, in the simulated vascular formation step, the simulated vascular material is wound after the liquid simulated vascular material is applied to the outer surface of the fluidized layer.