Simulated organ model

Abstract

To provide a simulated organ model which an operator can use more easily and more simply than an existing simulator or organ model.SOLUTION: The simulated organ model includes: a simulated organ model body 1; an eccentric rotary body 2 arranged in the simulated organ model body 1; and a driving unit 3 for driving the eccentric rotary body 2. The eccentric rotary body 2 is relatively rotated with respect to the simulated organ model body 1, and the surface of the eccentric rotary body 2 and the simulated organ model body 1 are directly slid so that the cyclic repetitive operation of the simulated organ model body 1 in association with the sliding can be regenerated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a simulated organ model that is primarily used for training surgical techniques. [Background technology]

[0002] (Surgical technique training using simulated organs) Traditionally, surgical training using mock organ models has been conducted primarily to compensate for the lack of surgical experience of young doctors.

[0003] As explained below, such surgical technique training includes wet labs that use animal organs such as pigs, and dry labs that use artificial organ imitation or organ models such as simulators. In addition, although few in number, training using live animals such as pigs is also conducted in animal labs.

[0004] (Off-JT) Here, these wet labs, dry labs, etc. are collectively referred to as Off-the-job training (Off-JT) because they are conducted at times and in environments different from clinical work involving actual patients.

[0005] Off-the-job training (OFF-JT) is rapidly becoming popular as a way to educate surgeons on their surgical skills and develop them in a situation where there is no risk to patients. In Japan, the Cardiovascular Surgery Specialist Certification Board requires that all applicants obtain a 30-hour OFF-the-job training course in order to become a cardiovascular surgeon.

[0006] (Dry Lab) Dry labs are becoming increasingly popular as a means of off-the-job training, but there are issues with reproducing the properties and anatomy of living tissues. For this reason, it is common to conduct repetitive basic training in a dry lab followed by advanced training in a wet lab environment that is closer to clinical practice.

[0007] (Wet Lab) For the purposes of wet lab animal organs, wild animals are unsuitable for hygiene and safety reasons, and livestock organs for meat production are more suitable, mainly pigs. In particular, in cardiovascular surgery, pig hearts are used for training because of their similar weight and dimensions. In digestive surgery, pig stomachs and large intestines are used, and in respiratory surgery, pig hearts and lungs are used.

[0008] (Animal Lab) On the other hand, animal labs are the most high-end training method that uses live animals.

[0009] In the animal lab, we mainly use pigs. Using a living animal has the advantage of blood circulation, bleeding, breathing, biological reactions to drugs, and anatomical reproducibility. In particular, the heartbeat, breathing, and digestive tract movement and behavior derived from a living animal are important elements in training surgical techniques.

[0010] However, due to ethical, safety, and cost considerations, animal labs are only used in a very limited capacity and are not suitable for routine training.

[0011] Therefore, efforts have been made in the past to impart movements and behaviors specific to living organisms to the organs being trained in wet labs.

[0012] (Conventional technology that pressurizes the inner cavity of a simulated heart to drive it) First, conventional technologies for pressurizing and driving the inner cavity of a simulated heart include those disclosed in Japanese Patent Application Laid-Open Nos. 2006-276258, 6629002, 2012-203016, and Patent No. 5810250. The technologies disclosed in these documents reproduce cardiac pulsation behavior by pressurizing and depressurizing the working fluid in the inner cavity of a heart model or a pig heart.

[0013] In addition, JP 2020-091306 A discloses a technology in which the inner cavity of a target organ is filled with a working fluid to reproduce hemodynamics and diffusion of a contrast agent, but this technology is not intended to impart movement to the target organ.

[0014] (Conventional technology that drives the entire simulated heart) Furthermore, as a conventional technique for driving the entire simulated heart, there is a technique disclosed in JP 2005-2020267 A. This technique uses an external drive device that combines a rotation drive means and a swing means to impart motion to the entire target simulated organ.

[0015] (Conventional technology that drives part of a simulated heart) Furthermore, a conventional technology for driving a part of a simulated heart is disclosed in JP 2014-142535 A. This technology reproduces the peristaltic movement inside the stomach by connecting a rotary drive body and a rotor and bringing the rotor into contact with a stomach model.

[0016] In this way, prior art methods for driving a target organ include filling the inside with a working fluid and pressurizing or depressurizing it, imparting movement to the entire simulated organ using an external driving means, and imparting the desired movement to the inside of the simulated organ using an external driving means.

[0017] In surgical procedures such as cardiac surgery, laparoscopic surgery, and thoracoscopic surgery, and in clinical tests such as gastrointestinal endoscopy, the pulsation and movement of specific organs have a large effect on the procedure. Therefore, training simulators for these procedures are required to reproduce their behavior.

[0018] Due to the spread of COVID-19, surgical training needs to be simple and conducted with a small number of people. It is not possible to use a large number of manpower to prepare and use a simulator, so there is a demand for a mock organ model with a simple and concise structure and sufficient functions. Summary of the Invention [Problem to be solved by the invention]

[0019] The above-mentioned conventional organ driving methods all have complex configurations that require careful handling. For example, when driving a target organ by increasing or decreasing the pressure of a working fluid, ensuring confidentiality is a major issue, and it is difficult to reliably prevent leakage of the working fluid, which requires a maintenance person to constantly manage the simulator. In addition, driving an organ model by an external driving means is also mechanically complex and not simple.

[0020] For example, in cardiac surgery, it is necessary to make the hearts of animals such as pigs pulsate in order to train in beating-heart coronary artery bypass surgery. For this purpose, there is a method of driving the pig heart by internally pressurizing and depressurizing it using the conventional technology mentioned above, but the device is large and complex, and the problem is that the user, the doctor, cannot use it alone. Even during the COVID-19 pandemic, there is a need for surgical training, such as through surgical technique review committees led by specialist societies, and there is a demand for wet labs that reproduce pulsation and behavior with a simple and easy structure.

[0021] The present invention has been made in consideration of the above circumstances, and aims to provide a simulated organ model that is simpler and easier for surgeons to use than conventional simulators and organ models. [Means for solving the problem]

[0022] The inventors conducted trial and error in an attempt to improve the reproducibility of the behavior of actual human organs such as the heart and digestive tract in surgical training, and gained knowledge regarding means for imparting highly reproducible behavior to animal organs such as those of pigs, and simulated organs. After diligent development, including creating actual prototypes, they completed the present invention.

[0023] That is, according to a main aspect of the present invention, the following configuration is provided.

[0024] (1) A simulated organ model body; An eccentric rotor disposed inside the main body of the simulated organ model; having The eccentric rotor is rotated relative to the simulated organ model body, and a surface of the eccentric rotor is directly slid against one surface of the simulated organ model body, thereby reproducing a periodic repetitive motion of a part of the simulated organ model body involved in the sliding. A simulated organ model.

[0025] (2) In the simulated organ model for surgical technique training according to (1), The rotational speed of the eccentric rotor is equal to the pulsation rate simulated by the simulated organ model. A simulated organ model.

[0026] (3) In the simulated organ model according to (2), The rotation speed is 15 rpm to 60 rpm. A simulated organ model.

[0027] (4) In the simulated organ model according to (1), Further, a drive unit for driving the eccentric rotor is provided. A simulated organ model.

[0028] (5) In the simulated organ model according to (4), The driving body is disposed inside the body of the simulated organ model. A simulated organ model.

[0029] (6) In the simulated organ model according to (4), A fixing means for fixing the driving body to the simulated organ model body is provided. A simulated organ model.

[0030] (7) In the simulated organ model according to (4), The driving body is disposed outside the simulated organ model body, The driving body and the eccentric rotor are connected by a flexible shaft. A simulated organ model.

[0031] (8) In the simulated organ model according to (4), The driving body is an electric motor with a rated voltage of 12 V or less. A simulated organ model.

[0032] (9) In the simulated organ model according to (1), The shape of the outer surface of the eccentric rotor that slides against the simulated organ model has a shape that does not intersect a tangent line with other positions on the outer surface. A simulated organ model.

[0033] (10) In the simulated organ model according to (1), The ratio of the major axis length to the minor axis length in the direction perpendicular to the rotation axis of the eccentric rotor is 1 / 2 or more. A simulated organ model.

[0034] (11) In the simulated organ model according to (1), The eccentricity of the eccentric rotor is 1 / 2 or more. A simulated organ model.

[0035] (12) In the simulated organ model according to (1), The simulated organ model body is an animal organ derived from livestock for meat production. A simulated organ model.

[0036] (13) In the simulated organ model according to (12), The animal organs derived from livestock for meat are pigs and sheep. A simulated organ model.

[0037] (14) In the simulated organ model according to (1), The simulated organ model body includes the heart, lungs, esophagus, stomach, small intestine, large intestine, and blood vessels. A simulated organ model.

[0038] (15) In the simulated organ model in (1), The simulated organ model body is an artificial simulated organ model made of an elastic material. A simulated organ model.

[0039] (16) In the simulated organ model according to (1), A simulated organ model that reproduces behavior with different phases by using one or more of the above rotary drive bodies simultaneously.

[0040] Other features of the present invention will be disclosed in the following description of the preferred embodiments and drawings. [Brief description of the drawings]

[0041] [Figure 1] FIG. 1 is a schematic diagram showing a simulated organ model according to one embodiment of the present invention.

[0042] [Diagram 2] FIG. 2 is an explanatory diagram showing the embedding of a simulated organ model drive unit.

[0043] [Diagram 3] FIG. 3 is a schematic diagram showing the configuration of the simulated organ model drive unit.

[0044] [Figure 4] FIG. 4 is a schematic diagram showing the shape of the eccentric rotor.

[0045] [Diagram 5] FIG. 5 is an explanatory diagram showing the embedding process of the simulated organ model drive unit.

[0046] [Figure 6] FIG. 6 is an explanatory diagram showing the embedding process of the simulated organ model drive unit.

[0047] [Figure 7]FIG. 7 is a schematic diagram showing a modified example of the simulated organ model drive unit.

[0048] [Figure 8] FIG. 8 is a schematic diagram showing a modified example of the simulated organ model.

[0049] [Figure 9] FIG. 9 is a schematic diagram showing a second embodiment of the simulated organ model.

[0050] [Figure 10] FIG. 10 is a schematic diagram showing a modified example of the simulated organ model drive unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0051] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0052] (First embodiment) First, as a first embodiment, an example in which the present invention is applied to a simulated organ model for training in coronary artery bypass surgery procedures in cardiovascular surgery will be described.

[0053] Coronary artery bypass surgery is a procedure for suturing coronary arteries of about 2 mm in diameter, and a procedure performed under beating heart conditions without using a cardiopulmonary bypass is called off-pump coronary artery bypass surgery. This embodiment is a simulated organ model for training the off-pump coronary artery bypass surgery procedure among other coronary artery bypass surgeries.

[0054] The details will be explained below.

[0055] (Mock organ model body) In Fig. 1, reference numeral 1 denotes the main body of the simulated organ model that is the subject of surgical technique training. Embedded inside this simulated organ model main body 1 is an organ drive unit 4 that is composed of an eccentric rotor 2 for displacing the simulated organ model main body 1 and a drive unit 3 for rotating the eccentric rotor.

[0056] In this first embodiment, the simulated organ model body 1 is a part of a pig heart.

[0057] As shown in Figure 2, the apex of the simulated organ model main body 1 (pig heart) is incised as indicated by symbol A in the figure, and a portion of the new inner wall is removed to form a space 14 for embedding the eccentric rotor and drive unit, and the organ drive unit 4 is inserted into the space 14 as indicated by the arrow in the figure.

[0058] (Eccentric Rotating Body) FIG. 3 is a schematic diagram showing the organ driving unit 4.

[0059] First, in this first embodiment, the eccentric rotor 2 has a rotor main body 5 that is approximately semispherical (mushroom-shaped) and an eccentric rotation central axis 6 attached to an eccentric axis C at a position shifted a predetermined distance from the central axis B of this main body 5.

[0060] The rotor main body 5 has one surface 5a on the side from which the rotation central axis 6 is derived, and a spherical outer surface 5b in contact with the inner cavity surface of the simulated organ model main body 1. This outer surface 5b is adapted to be in direct contact with the simulated organ model main body 1, and when driven to rotate, it must continue to rotate by sliding against the inner cavity surface of the space 14. For this reason, the outer surface 5b of the eccentric rotor 2 is formed as a smooth surface without any protrusions or catches.

[0061] The shape of this eccentric rotor 2 will be described below using the shape of this embodiment (FIG. 4(a)).

[0062] (1) The tangent line T does not interfere with other positions on the outer surface 5b. (2) The outer surface 5b may have a recess in part, but it is not preferable for a protrusion to be provided. (3) The ratio of the major axis length to the minor axis length in the direction perpendicular to the axis of rotation is 1 / 2 or more (in the example of Figure 4(a) which is a perfect circle, the minor axis = major axis, so the ratio is 1) (4) Eccentricity ratio (S / L) is 1 / 2 or more. Moreover, the dimensions of the eccentric rotor 2 are preferably designed to match the dimensions of the simulated organ model main body 1. In the case of this example (pig heart), it is a perfect circle with an outer diameter of 40 mm in the direction perpendicular to the central axis B, and a thickness of 20 mm in the direction along the central axis B. The eccentric rotation central axis 6 is attached along an eccentric axis C that is 10 mm eccentric outward from the original central axis B.

[0063] As long as the above conditions are satisfied, the dimensions of the eccentric rotor 2 and the shape of the outer surface 5b can be designed appropriately according to the dimensions of the simulated organ model main body 1, the type of organ, and the shape and position of the part to be displaced. In addition, the position at which the eccentric central axis is attached, i.e., the attachment position that determines the eccentric behavior of the eccentric rotor, can also be determined appropriately.

[0064] For example, as shown in Fig. 4(b), the eccentric rotor 2 may have an elliptical cross section. In this case, the eccentric rotation central shaft 6 may be disposed along the central axis of the eccentric rotor 2.

[0065] Furthermore, any appropriate manufacturing method and material can be used for this eccentric rotor 2, but in this example, it was created using an FDM type three-dimensional printer and was manufactured using ABS filament.

[0066] (Driver) Next, the driving unit 3 in this embodiment is a small DC reduction geared motor, and as shown in FIG. 3(b), is directly connected to the eccentric rotation central shaft 6.

[0067] Specifically, in the drive unit 3, a reduction gear head 9 having a reduction ratio of 1:75 is attached to a 12V DC motor 8, and the eccentric rotation central shaft 6 is led out from the reduction gear head 9 as an output shaft.

[0068] This allows the rotational speed of the eccentric rotor 2 to be set to the same value as a general heart rate. In this example, the reduced rotational speed from the reduction gear head 9 is set to 60 rotations per minute (60 rpm) in accordance with the heart rate.

[0069] The drive unit 3 is housed in an exterior housing 10 made of, for example, ABS resin, for protection from blood and tissue fluids. It is further preferable to protect the entire unit 4 including the eccentric rotor 2 by covering the drive unit 3 and the eccentric rotor 2 with a film made of polyethylene or polyvinylidene chloride.

[0070] (Fixing the driver) Furthermore, when the eccentric rotor 2 is driven by the drive unit 3, it is important to fix the drive unit 3 within the simulated organ model main body 1 to prevent the drive unit 3 itself from rotating.

[0071] In this embodiment, the drive unit 4 (drive section 3 and eccentric rotor 2) is installed in the space 14 inside the simulated organ model main body 1 through an insertion opening (Fig. 2) provided in the simulated organ model main body 1 (Fig. 5), and after installation, the incised insertion opening is closed with sutures, a stapler, or the like, as shown in Fig. 6. In this way, the drive section 3 can be fixed inside the simulated organ model main body 1 by the external force from the myocardial tissue that accompanies this closure.

[0072] When an animal organ is used as the simulated organ model main body 1, there are individual differences in size and tissue properties. For example, when the drive unit 4 is installed in a relatively large animal heart, the drive unit 3 itself may rotate, and the sliding between the eccentric rotor 2 and the simulated organ model main body 1 may not function normally. In this case, it is preferable to provide a protrusion that serves as a catch on the housing 10 of the drive unit 3 so that the drive unit 3 can be easily fixed in the simulated organ model 1, or to add a structure such as a fixing stay 15 as shown in FIG. 7 and fix the drive unit 3 to the simulated organ model main body 1 using the stay 15. The stay 15 may be fixed using a suture or a stapler.

[0073] (Power supply and operation specifications) It is important that off-the-job training in surgical techniques can be carried out easily and with a minimum of configuration. Typically, it is preferable that the training be carried out on a desktop in an office, for example.

[0074] For this reason, in this embodiment, to operate the DC motor 8, instead of using a general AC-DC conversion power supply, a USB connector 17 is adopted with a boost circuit 16 interposed therebetween as shown in FIG. 3(b).

[0075] In this example, power is supplied to the drive unit 3 by connecting the USB connector to a USB power source having an electrical capacity of 5V / 12W. USB power sources, such as mobile batteries, are available anywhere in the world and are small. However, since the output voltage is 5V, in this example, a boost circuit 16 is used to boost the voltage to 12V.

[0076] (Example of operation) When the simulated organ model 1 configured as described above is connected to a power source using the USB connector 17, the eccentric rotor 2 rotates at 60 revolutions per minute via the eccentric rotation central shaft 6. As a result, the outer surface 5b of the eccentric rotor 2 slides while maintaining a state of close contact with the inner surface of the space 14 of the heart cavity, and the myocardial part follows the shape of the outer surface 5b of the eccentric rotor 2 and periodically undergoes repeated displacement according to the eccentricity / amount of eccentricity of the eccentric shaft.

[0077] In this embodiment, when a comparison was made between phases of 180 degrees and 0 degrees over one rotation of the motor (360 degrees), the deviation in the normal direction on the myocardial surface was approximately 3 mm.

[0078] In this embodiment, the positions and orientations of the drive unit 3 and the eccentric rotor 2 are adjusted so that the eccentric rotor is located immediately below the left anterior descending coronary artery, which is the most frequently trained location in coronary artery bypass surgery training. This allows a periodic repetitive motion of approximately 3 mm to be obtained specifically and locally in the anterior descending coronary artery.

[0079] Furthermore, in this embodiment, the entire drive unit 4 is completely embedded within the simulated organ model main body 1, and at first glance the presence of the device itself cannot be recognized, resulting in a visually natural and highly realistic beating heart model.

[0080] (Modification) In the above example, the simulated organ model body was a pig heart (320 g), but when using a sheep heart or the like, the simulated organ model body is relatively small (120 g), and in this case it is difficult to create space to embed the driver body.

[0081] In this embodiment, the sheep's heart is used as the simulated organ model main body 1, and as shown in Figure 8, only the eccentric rotor 2 is embedded in the simulated organ model main body 1, and the eccentric rotation central axis 6 attached to the eccentric rotor 2 is extended using a flexible shaft 18 with a flexible resin protective film having a diameter of 6 mm, led out to the outside of the simulated organ model main body 1, and connected to the drive unit 3.

[0082] When the driving unit 3 is operated in this state, the eccentric rotor 2 can be eccentrically rotated in the cardiac cavity via the flexible shaft 18. This causes the outer surface 5b of the eccentric rotor 2 to slide in the cardiac cavity, thereby obtaining a periodic repetitive motion on the outer surface of the myocardium.

[0083] When reproducing such respiratory behavior, the driving rotation speed of the driver is preferably 10 to 30 rpm, and more preferably 15 rpm.

[0084] In addition, when reproducing a normal heart rate, it is preferable that the rpm is 60 to 120, and for tachycardia and arrhythmia, it is 200 to 300.

[0085] Second Embodiment The second embodiment provides a simulated organ model that simulates a surgical procedure on the hilar blood vessels under thoracoscope.

[0086] In recent years, endoscopic surgery has made remarkable progress, and endoscopic surgery is now being applied not only to gastrointestinal surgery but also to thoracic surgery and neurosurgery. Endoscopic surgery is highly challenging because the target organs are given respiratory and pulse-related behaviors. Therefore, to perform effective surgical training, it is necessary to reproduce these behaviors in a simulated organ model.

[0087] 19, in this embodiment, the simulated organ model main body 1' is a part of a pig heart-lung including hilar blood vessels 19. In this example, a space for embedding the drive unit 4' is formed by incising a position of the simulated organ model main body 1' corresponding to the rear side of the hilar blood vessels 19.

[0088] In this embodiment, the eccentric rotor 2' has a cylindrical shape with a circular cross section having a dimension of 15 mm along the axial direction and a diameter of 10 mm perpendicular to the axis. A rotation center axis 6 is led out from an eccentric position of the cylindrical eccentric rotor 2' and connected to a drive unit 3. The drive unit 4' thus configured is embedded in a space in the simulated organ model main body 1', and the drive unit 3 is fixed by closing the incision position that provided the space.

[0089] With this configuration, by driving the drive section 3 of the drive unit 4' at 60 revolutions per minute, the eccentric rotor 2 can be driven, and the surface of the eccentric rotor 2 can slide against the back surface of the hilar blood vessel. This allows the inner wall of the hilar blood vessel to undergo periodic repetitive motion up and down with an amplitude of about 4 mm 60 times per minute.

[0090] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit and scope of the present invention.

[0091] For example, the above-mentioned simulated organ model bodies 1, 1' are organs derived from animals, but they may be made of artificial materials such as silicon or gel.

[0092] Furthermore, in the above embodiment, only a single driving body unit 4, 4' is embedded in the simulated organ model main body 1, 1', but two or more units 4, 4' may be embedded to provide a composite operation.

[0093] Furthermore, as already mentioned, the shape of the outer surface of the rotor 2 must be smooth so as not to get caught on the inner surface of the simulated organ model main body 1, 1', and it is not preferable for it to have any irregularities. However, as shown in Figure 10, there is no problem with the irregularities 21 being formed in the axial direction rather than the circumferential direction.

[0094] In the above embodiment, the drive unit 4 is in direct contact with the inner surface of the simulated organ model main body 1, but a lubricant or lubricating member may be interposed between the drive unit 4 and the inner surface of the simulated organ model. As the lubricating member, for example, a bag made of a flexible material may be inserted in a state of being in close contact with the inner surface of the simulated organ model, and the drive unit 4 may be disposed inside the bag. In this case, a lubricant may be applied to the inner surface of the bag. [Explanation of symbols]

[0095] 1…Mock organ model body 2...Eccentric rotor 3. Drive unit 4. Organ drive unit 5...Rotating body 5a…One side 5b...Outer surface 6...Eccentric rotation axis 8…DC motor 9…Reduction gear head 10. Housing 14…Space 15...Stay 16...Boost circuit 17…Connector 18...Flexible shaft 19…hilar blood vessels 21…Unevenness

Claims

1. An organ drive unit to be embedded in an animal-derived simulated organ body for use in surgical technique training, The simulated organ model has an eccentric rotor installed inside the simulated organ model, The eccentric rotor is driven to rotate eccentrically inside the simulated organ model body, and the outer surface of the eccentric rotor slides against the inner surface of the simulated organ model body, reproducing the periodic repetitive pulsating motion of the part of the simulated organ model body involved in this sliding. It is something A rotary drive shaft for eccentrically rotating the eccentric rotor is attached to one surface of the eccentric rotor. The surface of this eccentric rotor opposite to the surface on which the rotation drive shaft is attached is composed of a hemispherical surface that protrudes toward the simulated organ model main body along the axial direction of the rotation drive shaft, and is connected to the surface on which the rotation drive shaft is attached so as to be continuous with a smooth curved surface, so that it slides on the inner surface of the simulated organ model main body without getting caught. An organ drive unit characterized by:

2. The organ driving unit according to claim 1, a drive motor fixedly embedded in the main body of the simulated organ model, and driving the eccentric rotor via the rotary drive shaft; An organ drive unit characterized by:

3. The organ driving unit according to claim 1, The hemispherical surface of the eccentric rotor protruding toward the main body of the simulated organ model has the shape of the outer surface of a mushroom cap. An organ drive unit characterized by:

4. 3. The organ driving unit according to claim 2, A fixing means for fixing the drive motor to the simulated organ model body is provided. An organ drive unit characterized by:

5. 3. The organ driving unit according to claim 2, The drive motor is an electric motor with a rated voltage of 12 V or less. An organ drive unit characterized by:

6. 2. The organ driving unit according to claim 1, The shape of the hemispherical surface that slides against the simulated organ model of the eccentric rotor has a shape that does not intersect a tangent with other positions on the outer surface. An organ drive unit characterized by:

7. 2. The organ driving unit according to claim 1, The ratio of the major axis length to the minor axis length in the direction perpendicular to the rotation axis of the eccentric rotor is 1 / 2 or more. An organ drive unit characterized by:

8. 2. The organ driving unit according to claim 1, The eccentricity of the eccentric rotor is 1 / 2 or more. An organ drive unit characterized by:

9. 2. The organ driving unit according to claim 1, The simulated organ model body is an animal organ derived from livestock for meat production. An organ drive unit characterized by:

10. 10. The organ driving unit according to claim 9, The animal organs derived from livestock for meat production are those of pigs or sheep. An organ drive unit characterized by:

11. 2. The organ driving unit according to claim 1, The simulated organ model body is any one of the heart, lungs, esophagus, stomach, small intestine, large intestine, and blood vessels. An organ drive unit characterized by:

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