Mastoid radical operation teaching device and system thereof

Abstract

The utility model relates to the technical field of medical teaching, in particular to a mastoid radical operation teaching device and a system thereof. The mastoid process radical operation teaching device comprises a conductive nerve, a conductive grinding machine, a first reminding unit and a driving unit, and the conductive nerve is used for being buried in an external temporal bone model to simulate nerves in a mastoid process of a human body; the conductive grinding machine is used for removing sclerotin in a mastoid region in the external temporal bone model; the driving unit is connected with the first reminding unit and the conductive nerve and used for driving the first reminding unit to work when the conductive grinding machine makes contact with the conductive nerve to form a short-circuit loop. According to the mastoid process radical treatment teaching device, the fidelity and practicability of mastoid process radical treatment teaching in surgical operation training can be improved, an operator is helped to adjust operation on the conductive grinding machine, the protection skill of nerves in the mastoid process is practiced, and the teaching quality of the mastoid process radical treatment is helped to be improved.

Description

Technical Field

[0001] This utility model relates to the field of medical teaching technology, and in particular to a teaching device and system for mastoidectomy. Background Technology

[0002] Mastoidectomy is a common and important surgical procedure in otology, primarily used to treat chronic suppurative otitis media, cholesteatoma-type otitis media, and other similar conditions. This surgery requires the surgeon to have a precise understanding of the anatomy of the mastoid process, especially the identification and protection of the nerves within the mastoid, as these nerves are highly susceptible to damage during the procedure, which can lead to serious consequences.

[0003] Temporal bone models are important teaching tools used to help medical students and surgeons lacking practical experience become familiar with the anatomy of the mastoid process and the surgical procedure for radical mastoidectomy. However, while existing temporal bone models can simulate the bone structure and some anatomical details of the mastoid process, they lack simulation of the nerves within the mastoid process. This makes it difficult for students to practice nerve protection techniques in simulated surgeries during radical mastoidectomy. Therefore, current radical mastoidectomy teaching methods have low realism and practicality in surgical training, hindering the improvement of teaching quality for radical mastoidectomy. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a teaching device and system for radical mastoidectomy, so as to solve the problem that the teaching of radical mastoidectomy in the prior art has low realism and practicality in surgical operation training, which is not conducive to improving the teaching quality of radical mastoidectomy.

[0005] This utility model discloses a teaching device for mastoidectomy, comprising a conductive nerve, a conductive grinder, a first reminder unit, and a drive unit, wherein...

[0006] The conductive nerve is used to be implanted in an external temporal bone model to simulate the nerves in the human mastoid process;

[0007] The conductive grinder is used to remove bone from the mastoid region of an external temporal bone model;

[0008] The driving unit is connected to the first reminder unit and the conductive nerve. The driving unit is used to drive the first reminder unit to work when the conductive polisher and the conductive nerve form a short circuit.

[0009] Optionally, the conductive nerve is provided with a first nerve branch, a second nerve branch, and a third nerve branch. The first nerve branch, the second nerve branch, and the third nerve branch are connected to a power supply. The conductive polisher is grounded. The mastoidectomy teaching device also includes a first voltage reference unit. The driving unit includes a first comparator. The first voltage reference unit is connected to the non-inverting input terminal of the first comparator. The inverting input terminal of the first comparator is connected to the first nerve branch and the power supply. The output terminal is connected to the first reminder unit to drive the first reminder unit to work.

[0010] Optionally, the mastoidectomy teaching device further includes a second reminder unit, and the driving unit is also used to drive the first reminder unit and the second reminder unit to work when the conductive grinder grinds and disconnects the first nerve branch, the second nerve branch or the third nerve branch.

[0011] Optionally, the mastoidectomy teaching device further includes a second voltage reference unit, and the driving unit further includes a second comparator. The inverting input terminal of the second comparator is connected to the second voltage reference unit, the non-inverting input terminal is connected to the second nerve branch and the power supply, and the output terminal is connected to the first reminder unit and the second reminder unit to drive the first reminder unit and the second reminder unit to work.

[0012] Optionally, the mastoidectomy teaching device further includes a third voltage reference unit, and the driving unit further includes a third comparator. The inverting input terminal of the third comparator is connected to the third voltage reference unit, the non-inverting input terminal is connected to the third nerve branch and the power supply, and the output terminal is connected to the first reminder unit and the second reminder unit to drive the first reminder unit and the second reminder unit to work.

[0013] Optionally, the first reminder unit includes a buzzer and a switching transistor. The positive terminal of the buzzer is connected to a power supply, the negative terminal is connected to the first terminal of the switching transistor, the second terminal of the switching transistor is grounded, and the driving terminal of the switching transistor is connected to the output terminals of the first comparator, the second comparator, and the third comparator.

[0014] Optionally, the first reminder unit further includes a first LED, the negative terminal of which is grounded and the positive terminal is connected to the output terminal of the first comparator.

[0015] Optionally, the second reminder unit includes a second LED, the positive terminal of which is connected to the output of the second comparator and the output of the third comparator.

[0016] Optionally, the mastoidectomy teaching device further includes a terminal block and multiple wiring structures. The terminal block is provided with a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal is connected to the first nerve branch through a wiring structure. The second terminal is connected to the second nerve branch through a wiring structure. The third terminal is connected to the third nerve branch through a wiring structure. The fourth terminal is connected to the conductive polishing machine through a wiring structure. The first terminal is also connected to the power supply and the inverting input of the first comparator. The second terminal is also connected to the power supply and the non-inverting input of the second comparator. The third terminal is also connected to the power supply and the non-inverting input of the third comparator. The fourth terminal is grounded. The wiring structure includes a first wire, a connector, and a second wire. The first wire is electrically connected to the second wire through the connector.

[0017] This utility model also discloses a mastoidectomy teaching system, including a temporal bone model and a mastoidectomy teaching device as described above. The conductive nerve of the mastoidectomy teaching device is embedded in the temporal bone model to simulate the nerves in the human mastoid process.

[0018] Compared with the prior art, the beneficial effects of the mastoidectomy teaching device and system provided in this utility model embodiment are as follows: By setting a conductive nerve, which is embedded in the temporal bone model to simulate the nerve in the human mastoid process, when the operator uses a conductive grinder to learn how to remove bone in the mastoid region of the temporal bone model, if the conductive grinder comes into contact with the conductive nerve and forms a short circuit, the drive unit will drive the first reminder unit to work, so as to remind the operator that the conductive grinder is in contact with the conductive nerve, simulating the contact between the conductive grinder and the human nerve, thereby improving the realism and practicality of mastoidectomy teaching in surgical operation training, helping the operator to adjust the operation of the conductive grinder, practice the protection skills of the nerve in the mastoid process, and help improve the teaching quality of mastoidectomy. Attached Figure Description

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0020] Figure 1 This is a structural block diagram of the teaching device for radical mastoidectomy provided in this embodiment of the utility model;

[0021] Figure 2 This is a circuit diagram of a terminal block connecting a conductive polisher and a conductive nerve, provided in an embodiment of this utility model.

[0022] Figure 3 This is a partial circuit diagram of the driving unit provided in an embodiment of the present invention;

[0023] Figure 4 This is a partial circuit diagram of the first reminder unit provided in this embodiment of the utility model;

[0024] Figure 5 This is a partial circuit diagram of the first and second reminder units provided in this embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the mastoidectomy teaching device provided in this embodiment of the utility model;

[0026] Figure 7 This is a partial exploded view of the mastoidectomy teaching device provided in this embodiment of the utility model.

[0027] The labels for the attached figures are as follows:

[0028] 110. Conductive nerve; 111. First nerve branch; 112. Second nerve branch; 113. Third nerve branch; 120. Conductive polisher; 130. First reminder unit; 140. Drive unit; 141. First comparator; 142. Second comparator; 143. Third comparator; 150. First voltage reference unit; 160. Second reminder unit; 170. Second voltage reference unit; 180. Third voltage reference unit; 190. Wiring structure; 191. First wire; 192. Connector; 193. Second wire; 210. Housing; 211. Opening; 212. First light-transmitting hole; 213. Second light-transmitting hole; 220. Circuit board;

[0029] BUZZER1, buzzer; Q1, switching transistor; LED1, first LED; LED2, second LED; U1, driver chip; CN1, terminal block. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] This utility model embodiment provides a teaching device for radical mastoidectomy, such as... Figure 1 The teaching device for radical mastoidectomy includes a conductive nerve 110, a conductive grinder 120, a first reminder unit 130, and a drive unit 140.

[0032] The conductive nerve 110 is used to be implanted in an external temporal bone model to simulate the nerves in the human mastoid process.

[0033] The conductive grinder 120 is used to remove bone from the mastoid region of an external temporal bone model.

[0034] The drive unit 140 is connected to the first reminder unit 130 and the conductive nerve 110. The drive unit 140 is used to drive the first reminder unit 130 to work when the conductive polisher 120 and the conductive nerve 110 come into contact and form a short circuit.

[0035] The mastoidectomy teaching device of this application embodiment uses a conductive nerve 110 embedded in a temporal bone model to simulate the nerves within the human mastoid process. When an operator uses a conductive grinder 120 to learn how to remove bone from the mastoid region of the temporal bone model, if the conductive grinder 120 comes into contact with the conductive nerve 110 and forms a short circuit, the drive unit 140 activates the first reminder unit 130 to alert the operator that the conductive grinder 120 is in contact with the conductive nerve 110. This simulates the contact between the conductive grinder 120 and a human nerve, improving the realism and practicality of mastoidectomy teaching in surgical operation training. It also helps operators adjust their operation of the conductive grinder 120, practice techniques for protecting the nerves within the mastoid process, and ultimately improve the teaching quality of mastoidectomy.

[0036] In an optional embodiment of this application, the conductive nerve 110 may be made of metal material. When the conductive polisher 120 comes into contact with the conductive nerve 110, the conductive nerve 110 and the conductive polisher 120 form a short circuit.

[0037] refer to Figures 1 to 4 In an optional embodiment of this application, the conductive nerve 110 is provided with a first nerve branch 111, a second nerve branch 112, and a third nerve branch 113. The first nerve branch 111, the second nerve branch 112, and the third nerve branch 113 are connected to the power supply VCC. The conductive polisher 120 is grounded. The mastoidectomy teaching device also includes a first voltage reference unit 150. The driving unit 140 includes a first comparator 141. The first voltage reference unit 150 is connected to the non-inverting input terminal of the first comparator 141. The inverting input terminal of the first comparator 141 is connected to the first nerve branch 111 and the power supply VCC. The output terminal is connected to the first reminder unit 130 to drive the first reminder unit 130 to work.

[0038] The conductive nerve 110 is connected to the power supply VCC through its nerve branches. When the conductive polisher 120 comes into contact with any nerve branch of the conductive nerve 110, the conductive polisher 120 grounds the conductive nerve 110, forming a short circuit and causing a change in the circuit state. By setting a first comparator 141, the circuit state between the conductive polisher 120 and the conductive nerve 110 can be monitored. This ensures that when a short circuit is formed, a high-level signal is output to drive the first reminder unit 130 to work, reminding the operator that the conductive polisher 120 has come into contact with the conductive nerve 110. The operator can learn nerve protection techniques in a simulated environment, master the correct operating methods, and cultivate an awareness of nerve protection. At the same time, this circuit structure is simple and effective, providing operators with a safe and reliable teaching tool to help them make correct decisions and protect the patient's nervous system in actual surgery. The first voltage reference unit 150 can provide a reference voltage for the first comparator 141.

[0039] Among them, the first nerve branch 111, the second nerve branch 112, and the third nerve branch 113 respectively simulate the main trunk of the facial nerve, the mastoid segment of the facial nerve, and the chorda tympani nerve branch of the human nerve.

[0040] In an optional embodiment of this application, the conductive polisher 120 includes a polisher body, a conductive metal ring, and a metal polishing head. The polisher body drives the metal polishing head to rotate. The conductive metal ring is connected to the polisher body and contacts the metal polishing head. The conductive metal ring is grounded. When the polisher body drives the metal polishing head to rotate, the metal contact ring does not rotate with the metal polishing head. When the metal polishing head contacts the conductive nerve 110, it connects the conductive nerve 110 to the ground, forming a short-circuit loop.

[0041] refer to Figures 1 to 4 In an optional embodiment of this application, the mastoidectomy teaching device further includes a second reminder unit 160, and the drive unit 140 is also used to drive the first reminder unit 130 and the second reminder unit 160 to work when the conductive grinder 120 grinds the first nerve branch 111, the second nerve branch 112 or the third nerve branch 113 apart.

[0042] By monitoring the state of the first nerve branch 111, the second nerve branch 112, and the third nerve branch 113, the first reminder unit 130 and the second reminder unit 160 are activated when the conductive polisher 120 grinds the first nerve branch 111, the second nerve branch 112, or the third nerve branch 113 out of the nerve branch. This alerts the operator of the conductive polisher 120, helps them realize the change in the state of the nerve branches, and reminds the operator to adjust the operation of the conductive polisher 120. The operator can learn nerve protection techniques in a simulated environment.

[0043] refer to Figures 1 to 5In an optional embodiment of this application, the mastoidectomy teaching device further includes a second voltage reference unit 170, and the driving unit 140 further includes a second comparator 142. The inverting input terminal of the second comparator 142 is connected to the second voltage reference unit 170, the non-inverting input terminal is connected to the second nerve branch 112 and the power supply VCC, and the output terminal is connected to the first reminder unit 130 and the second reminder unit 160 to drive the first reminder unit 130 and the second reminder unit 160 to work.

[0044] By configuring a second comparator 142, the state of the second nerve branch 112 can be monitored. When the second nerve branch 112 is broken by the conductive polisher 120, the voltage at the non-inverting input of the second comparator 142 is less than the voltage at its inverting input, and the second comparator 142 outputs a high level, driving the first reminder unit 130 and the second reminder unit 160 to work, reminding the operator that the second nerve branch 112 is broken, and helping the operator adjust the operation of the conductive polisher 120. The circuit structure is simple and effective. The second voltage reference unit 170 can provide a reference voltage for the second comparator 142.

[0045] refer to Figures 1 to 5 In an optional embodiment of this application, the mastoidectomy teaching device further includes a third voltage reference unit 180, and the driving unit 140 further includes a third comparator 143. The inverting input terminal of the third comparator 143 is connected to the third voltage reference unit 180, the non-inverting input terminal is connected to the third nerve branch 113 and the power supply VCC, and the output terminal is connected to the first reminder unit 130 and the second reminder unit 160 to drive the first reminder unit 130 and the second reminder unit 160 to work.

[0046] By configuring a third comparator 143, the states of the first nerve branch 111 and the third nerve branch 113 can be monitored. When the first nerve branch 111 or the third nerve branch 113 is broken by the conductive polisher 120, the voltage at the non-inverting input terminal of the third comparator 143 is less than the voltage at the inverting input terminal, and the output terminal of the third comparator 143 outputs a high level, driving the first reminder unit 130 and the second reminder unit 160 to work, reminding the operator that the first nerve branch 111 or the third nerve branch 113 is broken. The circuit structure is simple and effective. The third voltage reference unit 180 can provide a reference voltage for the third comparator 143.

[0047] Optionally, refer to Figure 1 and Figure 3 The driving unit 140 uses the driving chip U1. The first comparator 141, the second comparator 142, and the third comparator 143 are integrated in the driving chip U1, which simplifies the circuit structure, saves space on the circuit board 220, and makes the design more compact. The driving chip U1 can be an LM33DR2G.

[0048] In an optional embodiment of this application, reference is made to Figure 1 , Figure 3 and Figure 4 The first reminder unit 130 includes a buzzer BUZZER1 and a switching transistor Q1. The positive terminal of the buzzer BUZZER1 is connected to the power supply VCC, the negative terminal is connected to the first terminal of the switching transistor Q1, the second terminal of the switching transistor Q1 is grounded, and the driving terminal of the switching transistor Q1 is connected to the output terminal of the first comparator 141, the output terminal of the second comparator 142, and the output terminal of the third comparator 143.

[0049] The use of a buzzer BUZZER1 as an alert for abnormalities in the conductive nerve 110 is relatively simple in structure and low in manufacturing cost. The buzzer BUZZER1 is typically small in size, making it easy to integrate into various small electronic devices without taking up much space. Furthermore, the buzzer BUZZER1 has low requirements for the power supply VCC and a very short response time, enabling it to promptly alert operators.

[0050] When any one of the first comparator 141, the second comparator 142, or the third comparator 143 outputs a high level, it can drive the switching transistor Q1 to work, turn on the working circuit of the buzzer BUZZER1, and drive the buzzer BUZZER1 to work. The overall circuit structure is simple.

[0051] In practice, the switching transistor Q1 can be an NMOS transistor. NMOS transistors have lower channel on-resistance, lower switching losses, and faster switching speed.

[0052] refer to Figure 1 , Figure 3 and Figure 5 In an optional embodiment of this application, the first reminder unit 130 further includes a first LED light LED1, the negative terminal of the first LED light LED1 is grounded, and the positive terminal is connected to the output terminal of the first comparator 141.

[0053] By setting the first LED (LED1), when the conductive polisher 120 contacts the conductive nerve 110, forming a short circuit, the first comparator 141 outputs a high level, and the first LED (LED1) lights up. The operator can directly observe the on / off state of the first LED (LED1) to know whether the conductive polisher 120 is in contact with the conductive nerve 110, thereby practicing controlling the conductive polisher 120. If either the buzzer 1 or the first LED (LED1) malfunctions, the operator can still determine whether the conductive polisher 120 is in contact with the conductive nerve 110 by observing the status of the other, making it highly practical.

[0054] refer to Figure 1 , Figure 3 and Figure 5In an optional embodiment of this application, the second reminder unit 160 includes a second LED light LED2, the positive terminal of which is connected to the output terminal of the second comparator 142 and the output terminal of the third comparator 143.

[0055] By setting a second LED (LED2), when the conductive polishing machine 120 grinds and disconnects the first nerve branch 111, the second nerve branch 112, or the third nerve branch 113, the corresponding second comparator 142 and third comparator 143 output a high level, driving the second LED (LED2) to work. The operator can directly observe the on / off state of the second LED (LED2) to know whether the conductive nerve 110 has been ground and disconnected, thus practicing controlling the conductive polishing machine 120 and simulating mastoidectomy. If either the buzzer 1 or the first LED (LED1) malfunctions, the operator can still use the status of the other to determine whether the conductive polishing machine 120 has ground and disconnected the conductive nerve 110, making it highly practical.

[0056] refer to Figure 2 and Figure 6 In an optional embodiment of this application, the mastoidectomy teaching device further includes a terminal block CN1 and multiple wiring structures 190. The terminal block CN1 is provided with a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block. The first terminal block is connected to a first nerve branch 111 through a wiring structure 190. The second terminal block is connected to a second nerve branch 112 through a wiring structure 190. The third terminal block is connected to a third nerve branch 113 through a wiring structure 190. The fourth terminal block is connected to a conductive polisher 120 through a wiring structure 190. The first terminal block is also connected to the power supply VCC and the inverting input terminal of the first comparator 141. The second terminal block is also connected to the power supply VCC and the non-inverting input terminal of the second comparator 142. The third terminal block is also connected to the power supply VCC and the non-inverting input terminal of the third comparator 143. The fourth terminal block is grounded. The wiring structure 190 includes a first wire 191, a connector 192, and a second wire 193. The first wire 191 is electrically connected to the second wire 193 through the connector 192.

[0057] By setting the wiring structure 190, each terminal of the terminal block CN1 can be connected to the conductive polisher 120 and the nerve branches of the conductive nerve 110 through the corresponding wiring structure 190. In the connection between the first terminal and the first nerve branch 111, the first wire 191 of the wiring structure 190 can be connected to the first nerve branch 111, and the second wire 193 can be connected to the first terminal, or the first wire 191 can be connected to the first terminal, and the second wire 193 can be connected to the first nerve branch 111. The connection method between the conductive polisher 120 and the fourth terminal, and the connection method between other nerve branches of the conductive nerve 110 and their corresponding terminals are the same as the connection method between the wiring structure 190 and the first nerve branch 111 and the first terminal, and will not be described in detail here. Multiple first conductive wires connecting different components can be of different colors to distinguish the components they are connected to. Similarly, multiple second conductive wires connecting different components can be of different colors.

[0058] In the wiring structure 190, the connector 192 is a connecting device, typically consisting of two parts: a plug and a socket. The plug is a connector with pins or sockets for insertion into the socket to establish an electrical or signal connection. The socket is the receiving end of the plug, usually containing corresponding holes or slots for receiving the plug and establishing a connection.

[0059] The conductive nerve 110 is embedded in the temporal bone model. The temporal bone model is a consumable material and cannot be reused after being polished by the conductive polishing machine 120. By setting up a wiring structure 190, the first wire 191 and the second wire 193 in the wiring structure 190 can be detachably electrically connected through the plug 192. That is, the conductive nerve 110 can be disassembled and assembled with other components (including the drive unit 140, the first reminder unit 130 and the second reminder unit 160), and other components other than the conductive nerve 110 can be reused, improving the practicality of the overall device.

[0060] In an optional embodiment of this application, reference is made to Figure 1 , Figure 6 and Figure 7The mastoidectomy teaching device may also include a housing 210, a circuit board 220, a battery (not shown), and a switch (not shown). The drive unit 140, the first voltage reference unit 150, the second voltage reference unit 170, the third voltage reference unit 180, the first reminder unit 130, and the second reminder unit 160 are all mounted on the circuit board 220, which is housed within the housing 210. The housing 210 has multiple openings 211 corresponding to the position of the buzzer BUZZER1 of the first reminder unit 130. The housing 210 also has a first light-transmitting hole 212 and a second light-transmitting hole 213. The first light-transmitting hole 212 corresponds to the position of the first LED LED1 of the first reminder unit 130, and the second light-transmitting hole 213 corresponds to the position of the second LED LED2 of the second reminder unit 160. The operator can determine the status of the conductive nerve 110 by observing the working status of the first LED LED1 and the second LED LED2.

[0061] The battery is electrically connected to the circuit board 220, and the battery provides operating voltage to the components on the circuit board 220. The switch is connected to the drive unit 140 and is used to drive the mastoidectomy teaching device to be turned on or off.

[0062] refer to Figures 1 to 5 The specific working principle of the mastoidectomy teaching device in this application embodiment is as follows:

[0063] The operator uses a conductive grinder 120 to grind away bone in the mastoid region of the temporal bone model, simulating a mastoidectomy. When the conductive grinder 120 is not in contact with the conductive nerve 110, the voltage at the inverting input of the first comparator 141 in the drive unit 140 is greater than the voltage at its non-inverting input, and the first comparator 141 outputs a low level. The buzzer BUZZER1 and the first LED LED1 in the first reminder unit 130 are not activated. When the conductive grinder 120 comes into contact with any branch of the conductive nerve 110, the corresponding branch is grounded, forming a short circuit. The voltage at the inverting input of the first comparator 141 is less than the voltage at its non-inverting input, and the first comparator 141 outputs a high level. The buzzer BUZZER1 and the first LED LED1 in the first reminder unit 130 then activate. When the conductive polisher 120 grinds off the second nerve branch 112 of the conductive nerve 110, the voltage at the non-inverting input of the second comparator 142 is less than the voltage at its inverting input, and the second comparator 142 outputs a high level, activating the buzzer BUZZER1 in the first reminder unit 130 and the second LED LED2 in the second reminder unit 160. When the conductive polisher 120 grinds off the first nerve branch 111 or the third nerve branch 113 of the conductive nerve 110, the voltage at the non-inverting input of the third comparator 143 is less than the voltage at its inverting input, and the third comparator 143 outputs a high level, activating the buzzer BUZZER1 in the first reminder unit 130 and the second LED LED2 in the second reminder unit 160. When all nerve branches of the conductive nerve 110 are ground off by the conductive polisher 120, the second comparator 142 and the third comparator 143 both output a high level. Compared to when only the first nerve branch 111 or the second nerve branch 112 is ground off, the sound of the buzzer BUZZER1 increases and the brightness of the second LED LED2 increases.

[0064] This application also provides a mastoidectomy teaching system, including a temporal bone model and a mastoidectomy teaching device as described above. The conductive nerve 110 of the mastoidectomy teaching device is embedded in the temporal bone model to simulate the nerves in the human mastoid process.

[0065] The mastoidectomy teaching system of this application embodiment uses a conductive nerve 110 embedded in a temporal bone model to simulate the nerves within the human mastoid process. When an operator uses a conductive grinder 120 to learn how to remove bone from the mastoid region of the temporal bone model, if the conductive grinder 120 comes into contact with the conductive nerve 110 and forms a short circuit, the drive unit 140 activates the first reminder unit 130 to alert the operator that the conductive grinder 120 is in contact with the conductive nerve 110. This simulates the contact between the conductive grinder 120 and a human nerve, improving the realism and practicality of mastoidectomy teaching in surgical operation training. It also helps operators adjust their operation of the conductive grinder 120, practice techniques for protecting the nerves within the mastoid process, and ultimately improve the teaching quality of mastoidectomy.

[0066] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A device for teaching radical mastoidectomy, comprising: The device comprises a conductive nerve, a conductive polisher, a first reminding unit and a driving unit, wherein, The conductive nerve is used to be embedded in an external temporal bone model to simulate the nerve in the mastoid of a human body; The conductive polisher is used to remove the bone in the mastoid area of the external temporal bone model; The driving unit is connected to the first reminding unit and the conductive nerve, and is used to drive the first reminding unit to work when the conductive polisher and the conductive nerve form a short circuit loop.

2. The mastoidectomy teaching device of claim 1, wherein, The conductive nerve is provided with a first nerve branch, a second nerve branch and a third nerve branch, the first nerve branch, the second nerve branch and the third nerve branch are connected to a power supply, the conductive polisher is grounded, the mastoidectomy teaching device further comprises a first voltage reference unit, the driving unit comprises a first comparator, the positive input end of the first comparator is connected to the first voltage reference unit, the inverting input end of the first comparator is connected to the first nerve branch and the power supply, and the output end is connected to the first reminding unit to drive the first reminding unit to work.

3. The mastoidectomy teaching device of claim 2, wherein, The mastoidectomy teaching device further comprises a second reminding unit, and the driving unit is further used to drive the first reminding unit and the second reminding unit to work when the conductive polisher polishes and disconnects the first nerve branch, the second nerve branch or the third nerve branch.

4. The mastoidectomy teaching device of claim 3, wherein, The mastoidectomy teaching device further comprises a second voltage reference unit, and the driving unit further comprises a second comparator, the inverting input end of the second comparator is connected to the second voltage reference unit, the positive input end is connected to the second nerve branch and the power supply, and the output end is connected to the first reminding unit and the second reminding unit to drive the first reminding unit and the second reminding unit to work.

5. The mastoidectomy teaching device of claim 4, wherein, The mastoidectomy teaching device further comprises a third voltage reference unit, and the driving unit further comprises a third comparator, the inverting input end of the third comparator is connected to the third voltage reference unit, the positive input end is connected to the third nerve branch and the power supply, and the output end is connected to the first reminding unit and the second reminding unit to drive the first reminding unit and the second reminding unit to work.

6. The mastoidectomy teaching device of claim 5, wherein, The first reminding unit comprises a buzzer and a switching tube, the positive electrode of the buzzer is connected to a power supply, the negative electrode is connected to the first end of the switching tube, the second end of the switching tube is grounded, and the driving end of the switching tube is connected to the output ends of the first comparator, the second comparator and the third comparator.

7. The mastoidectomy teaching device of any one of claims 2-6, wherein, The first reminding unit further comprises a first LED lamp, the negative electrode of the first LED lamp is grounded, and the positive electrode is connected to the output end of the first comparator.

8. The mastoidectomy teaching device of claim 6, wherein, The second reminding unit comprises a second LED lamp, the positive electrode of the second LED lamp is connected to the output ends of the second comparator and the third comparator.

9. The mastoidectomy teaching device of claim 5, wherein, The mastoidectomy teaching device further comprises a terminal block and a plurality of wiring structures, the terminal block is provided with a first terminal, a second terminal, a third terminal and a fourth terminal, the first terminal is connected with the first nerve branch through one wiring structure, the second terminal is connected with the second nerve branch through one wiring structure, the third terminal is connected with the third nerve branch through one wiring structure, and the fourth terminal is connected with the conductive polisher through one wiring structure, the first terminal is further connected with a power supply and an inverting input terminal of a first comparator, the second terminal is further connected with the power supply and a non-inverting input terminal of a second comparator, the third terminal is further connected with the power supply and a non-inverting input terminal of a third comparator, and the fourth terminal is grounded, wherein the wiring structure comprises a first wire, a plug connector and a second wire, and the first wire is electrically connected with the second wire through the plug connector. 10.A mastoidectomy teaching system, comprising a temporal bone model and the mastoidectomy teaching device according to any one of claims 1-9, and the conductive nerves of the mastoidectomy teaching device are embedded in the temporal bone model to simulate the nerves in the mastoid of a human body.

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