Depth of anesthesia monitor

Abstract

The utility model discloses an anaesthetic depth monitor relates to medical instrument technical field, wherein anaesthetic depth monitor includes host computer casing, screen, back shell and power, host computer casing forms first installation cavity and the opening of intercommunication first installation cavity, the side wall of host computer casing far from the opening is installation wall, and installation wall forms recess part, screen is detachably connected in host computer casing and is located at the opening, back shell is detachably connected in installation wall and is surrounded with recess part and forms second installation cavity, and power is located in second installation cavity and is electrically connected with screen, wherein, installation wall forms the air inlet hole and the air outlet hole of intercommunication first installation cavity, and the air inlet hole is located below second installation cavity, and the air outlet hole is located above second installation cavity. The utility model aims at improving the heat dissipation effect of anaesthetic depth monitor under the condition of weakening electromagnetic interference.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an anesthesia depth monitor. Background Technology

[0002] An anesthesia depth monitor is a medical device that uses electroencephalogram (EEG) signal acquisition and analysis technology to monitor the anesthesia depth index. Its core functions include accurately quantifying the degree of sedation, hypnosis, and analgesia to avoid complications caused by intraoperative awareness or over-anesthesia. This device employs technologies such as bispectral index (BSE) and auditory evoked potentials (AVPs) and is widely used in general anesthesia surgery, ICU sedation monitoring, and painless treatment scenarios. It features strong anti-interference capabilities and data traceability.

[0003] The existing anesthesia depth monitor has an unreasonable overall structural layout, with the power supply and screen too close together, resulting in severe electromagnetic interference. To reduce electromagnetic interference, a new back cover could be added to separate the power supply and screen into two chambers. However, adding a back cover prevents the two chambers within the monitor from conducting heat to each other, leading to poor heat dissipation. Utility Model Content

[0004] The main objective of this invention is to propose an anesthesia depth monitor that improves heat dissipation while reducing electromagnetic interference.

[0005] To achieve the above objectives, the anesthesia depth monitor proposed in this utility model includes: A main unit housing, the main unit housing having a first mounting cavity and an opening communicating with the first mounting cavity; the side wall of the main unit housing away from the opening is a mounting wall, the mounting wall having a recess; A screen, which is detachably connected to the main body housing and located at the opening; A back shell, detachably connected to the mounting wall, and enclosing the recess to form a second mounting cavity; and A power supply, which is located in the second mounting cavity and is electrically connected to the screen; The mounting wall has an air inlet and an air outlet that communicate with the first mounting cavity. The air inlet is located below the second mounting cavity, and the air outlet is located above the second mounting cavity.

[0006] In one embodiment, the main unit housing includes a front shell, an adapter shell, and a rear shell connected in sequence; The opening is formed in the front shell, and the recess is formed in the rear shell; the air inlet is formed in the bottom wall of the rear shell, and the air outlet is formed in the side wall of the adapter shell facing the rear shell.

[0007] In one embodiment, the air inlet hole penetrates the bottom wall and side wall of the rear shell to connect the first mounting cavity, the second mounting cavity, and the outside, respectively.

[0008] In one embodiment, the adapter shell has a handle protruding in a direction away from the front shell for the user to hold.

[0009] In one embodiment, the air inlet is formed below the handle portion.

[0010] In one embodiment, the anesthesia depth monitor further includes a buffer pad sandwiched between the main unit housing and the screen.

[0011] In one embodiment, the anesthesia depth monitor further includes a fixing member detachably connected to the periphery of the opening, and the screen is sandwiched between the fixing member and the buffer pad.

[0012] In one embodiment, the anesthesia depth monitor further includes a speaker assembly disposed within the first mounting cavity and electrically connected to the screen.

[0013] In one embodiment, the screen is a capacitive screen.

[0014] In one embodiment, the cushioning pad is made of rubber.

[0015] In the technical solution of this utility model, the anesthesia depth monitor includes a main unit housing, a screen, a back shell, and a power supply. The main unit housing has a first mounting cavity and an opening communicating with the first mounting cavity. The side wall of the main unit housing away from the opening is a mounting wall, and the mounting wall has a recess. The screen is detachably connected to the main unit housing and is located at the opening. The back shell is detachably connected to the mounting wall and, together with the recess, forms a second mounting cavity. The power supply is located in the second mounting cavity and is electrically connected to the screen. The mounting wall has an air inlet and an air outlet communicating with the first mounting cavity. The air inlet is located below the second mounting cavity, and the air outlet is located above the second mounting cavity. In the technical solution of this utility model, by combining the air inlet and air outlet at specific locations, an effective heat dissipation channel is established while maintaining cavity isolation. Simultaneously, the air in the heat dissipation channel can contact the recess, thereby achieving sufficient heat dissipation of the power supply in the second mounting cavity. This ensures electromagnetic isolation between the power supply and the screen, while guaranteeing the heat dissipation effect of the anesthesia depth monitor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 Exploded view of an embodiment of the anesthesia depth monitor provided by this utility model; Figure 2 An exploded view of another embodiment of an anesthesia depth monitor; Figure 3 This is a schematic diagram of the rear shell structure of an anesthesia depth monitor.

[0018] Explanation of icon numbers:

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] In existing technologies, anesthesia depth monitors commonly suffer from electromagnetic interference issues related to power supply and screen. Some devices reduce interference by adding a back cover to separate the cavity, but this structure obstructs internal airflow and affects heat dissipation efficiency.

[0024] To address the aforementioned problems, this utility model proposes an anesthesia depth monitor 1000. Figure 1 , Figure 2 as well as Figure 3 A schematic diagram of an embodiment of the anesthesia depth monitor 1000 provided by this utility model.

[0025] Please refer to Figure 1 , Figure 2 as well as Figure 3 This utility model proposes an anesthesia depth monitor 1000, including a main body housing 1, a screen (not shown), a back shell 2, and a power supply 3; the main body housing 1 forms a first mounting cavity and an opening 11a communicating with the first mounting cavity; the side wall of the main body housing 1 away from the opening 11a is a mounting wall, and the mounting wall forms a recess 131; the screen is detachably connected to the main body housing and is located at the opening 11a; the back shell 2 is detachably connected to the mounting wall and surrounds the recess 131 to form a second mounting cavity; the power supply 3 is located in the second mounting cavity and is electrically connected to the screen; wherein, the mounting wall forms an air inlet 13a and an air outlet 12a communicating with the first mounting cavity, the air inlet 13a is located below the second mounting cavity, and the air outlet 12a is located above the second mounting cavity.

[0026] The main unit housing 1 refers to the rigid frame that supports the core components. The screen refers to the information display unit, which can be connected to the housing via a snap-fit ​​structure for easy maintenance. The back cover 2 refers to the protective cover that covers the mounting wall, and is made of ABS engineering plastic injection molding to form a sealed cavity. The air inlet 13a refers to the ventilation port located at the bottom of the cavity, which can be equipped with a dust filter to prevent foreign objects from entering. The air outlet 12a refers to the exhaust port located at the top of the cavity, which can be designed with a grid structure to accelerate airflow dissipation. The power supply 3 is in the form of an adapter, rather than a PCBA board.

[0027] Specifically, the power supply 3 is enclosed within the second mounting cavity, reducing electromagnetic interference to the screen through physical isolation. The air inlet 13a and air outlet 12a form a vertically connected air duct, allowing cool air to enter from the bottom, rise after heating, and achieve natural convection cooling through the chimney effect. The first and second mounting cavities are connected by opening 11a, ensuring a complete airflow circulation path within the device.

[0028] By combining air inlets 13a and outlets 12a at specific locations, an effective heat dissipation channel is established while maintaining cavity isolation. Simultaneously, the air within this channel can contact the recess 131, thereby ensuring sufficient heat dissipation for the power supply 3 within the second mounting cavity. This guarantees the heat dissipation effect of the anesthesia depth monitor 1000 while ensuring electromagnetic isolation between the power supply 3 and the screen. This structure avoids the noise problems associated with adding a cooling fan and facilitates cleaning and maintenance through its detachable connection design. The device maintains a suitable operating temperature during continuous operation, ensuring screen display stability and power supply 3 operational reliability.

[0029] In one embodiment of the present invention, the main housing 1 includes a front shell 11, a transition shell 12 and a rear shell 13 connected in sequence; an opening 11a is formed in the front shell 11, and a recess 131 is formed in the rear shell 13; an air inlet 13a is formed in the bottom wall of the rear shell 13, and an air outlet 12a is formed in the side wall of the transition shell 12 facing the rear shell 13.

[0030] The sequential connection of the front shell 11, the adapter shell 12, and the rear shell 13 refers to assembling the three shell components into a single structure using snap-fit, bolt, or adhesive methods. This can be achieved through a modular design for easy disassembly and maintenance. The recess 131 refers to the area formed by the inward indentation on the surface of the rear shell 13, which can be formed by stamping or injection molding and is used to form a second mounting cavity with the back shell 2. The air inlet 13a formed on the bottom wall of the rear shell 13 refers to a through-hole opened at the bottom of the rear shell 13, which can be achieved by drilling or molding, and is used to introduce external air. The air outlet 12a formed on the side wall of the adapter shell 12 facing the rear shell 13 refers to a through-hole opened on the side of the adapter shell 12 adjacent to the rear shell 13, which can be achieved through a hollow structure or a slotting process, and is used to exhaust internal hot airflow.

[0031] Specifically, the front shell 11 serves as the front end component of the main unit housing 1, with its opening 11a for mounting the screen. The rear shell 13 serves as the rear end component, with its recess 131 cooperating with the back shell 2 to form an independent second mounting cavity to accommodate the power supply 3. The adapter shell 12 serves as the intermediate component connecting the front shell 11 and the rear shell 13, with its side wall air outlet 12a forming a vertical convection flow path with the air inlet 13a at the bottom of the rear shell 13. After cold air enters the first mounting cavity through the air inlet 13a on the bottom wall of the rear shell 13, it flows through the internal components of the main unit, carrying heat as it rises to the air outlet 12a on the side wall of the adapter shell 12 and is discharged, forming a natural convection heat dissipation path.

[0032] By using a split housing design, the air inlet 13a is located on the bottom wall of the rear housing 13, and the air outlet 12a is located on the side wall of the adapter housing 12. This makes the airflow direction consistent with the upward trend of the hot airflow, reducing airflow resistance, improving heat dissipation efficiency, solving the problem of poor heat dissipation caused by the split housing structure, optimizing the internal airflow circulation path, ensuring efficient heat dissipation while the power supply 3 and the screen are installed in separate cavities, and reducing the risk of electromagnetic interference.

[0033] In one embodiment of this utility model, the air inlet 13a penetrates the bottom wall and side wall of the rear shell 13 to connect the first mounting cavity, the second mounting cavity and the outside, respectively.

[0034] Specifically, the air inlet 13a forms a channel for outside air to enter the first mounting cavity at the bottom wall, and simultaneously forms an airflow exchange channel between the second mounting cavity and the first mounting cavity at the side wall. When outside air enters the first mounting cavity from the bottom wall, some of the airflow enters the second mounting cavity through the air inlet 13a on the side wall, forming a natural convection path. As the air flows over the surface of the power supply 3, it carries away heat and is finally discharged through the air outlet 12a of the adapter housing 12.

[0035] The through-holes 13a on the bottom and side walls form a three-way airflow channel, creating a three-dimensional heat dissipation network between the first mounting cavity, the second mounting cavity, and the external environment. This effectively enhances the airflow efficiency of the cavity where the power supply 3 is located, reduces the risk of increased electromagnetic interference due to poor heat dissipation, and avoids equipment failure caused by local high temperatures.

[0036] In one embodiment of the present invention, the adapter shell 12 is provided with a handle 121 protruding in the direction away from the front shell 11 for the user to hold.

[0037] The handle 121 refers to the protruding structure extending outward from the surface of the adapter shell 12. It can be achieved by injection molding or metal stamping. Its surface can be provided with anti-slip textures or covered with flexible material to enhance grip stability. This structure forms an ergonomic grip area through its protruding design, making it easier to apply force when operating with one hand.

[0038] Specifically, the handle 121 is located at the end area where the adapter shell 12 connects to the rear shell 13, and its protrusion direction is perpendicular to the overall length direction of the main unit shell 1. When the user holds the handle 121, their fingers can naturally fit into the recessed area formed by the protrusion, and their palm can rest against the surface of the adapter shell 12. A certain gap is maintained between the handle 121 and the rear shell 13 to avoid affecting the internal heat dissipation airflow layout.

[0039] By integrating the handle 121, the device maintains a compact layout while optimizing portability, and no additional external accessories are required. This solves the problem of inconvenient gripping caused by the complex structure of the Anesthesia Depth Monitor 1000. The handle 121 design improves ease of operation, reduces the risk of accidental drops, and avoids affecting internal heat dissipation efficiency due to structural modifications.

[0040] In one embodiment of the present invention, an air inlet 13a is formed below the handle portion 121.

[0041] Specifically, the handle 121, as a raised structure for the user to grip, forms a gap between its lower area and the bottom wall of the rear shell 13, allowing airflow. When the air inlet 13a is located below the handle 121, external cold air can directly enter the air inlet 13a through the space between the handle 121 and the bottom wall, then flow upward along the first mounting cavity, and finally be discharged through the air outlet 12a. This arrangement avoids the handle 121 obstructing the air intake path, while utilizing the space formed by the protrusion of the handle 121 to expand the air intake cross-sectional area and enhance airflow exchange efficiency.

[0042] By combining the air inlet 13a with the space of the handle 121, the handle function is retained while the air intake path is optimized, allowing the airflow to enter the device more smoothly. This solves the problem of reduced heat dissipation efficiency caused by the addition of the back cover 2. By optimizing the position of the air inlet 13a, the airflow circulation effect is improved, ensuring that the power supply 3 and the screen can still maintain a stable operating temperature under the cavity layout.

[0043] In one embodiment of the present invention, the anesthesia depth monitor 1000 further includes a buffer pad 4, which is sandwiched between the main unit housing 1 and the screen.

[0044] The buffer pad 4 refers to an elastic material layer placed between the host housing 1 and the screen contact surface. It can be made of materials with compression resilience, such as rubber, silicone, or polyurethane foam, to absorb external impact energy. This feature alleviates the rigid contact between the housing and the screen through elastic deformation, preventing the screen from shattering due to device vibration or collision.

[0045] Specifically, the buffer pad 4 is fitted onto the contact surface between the edge of the opening 11a of the main housing 1 and the screen frame. When the device is subjected to external impact, the buffer pad 4 absorbs the impact energy through its own compression deformation, preventing the rigid housing from directly pressing against the screen glass layer. At the same time, the elastic support of the buffer pad 4 can maintain a stable connection between the screen and the housing, preventing the connection structure from loosening due to long-term vibration.

[0046] By adding a buffer pad 4 to create a flexible transition layer, the impact energy transmission path is effectively blocked, significantly reducing the probability of screen breakage due to mechanical impact and extending the lifespan of the display components. The buffer structure maintains the device's compactness while ensuring the reliability of the screen-housing interface, reducing contact problems caused by vibration.

[0047] In one embodiment of the present invention, the anesthesia depth monitor 1000 further includes a fixing member 5, which is detachably connected to the periphery of the opening 11a, and the screen is sandwiched between the fixing member 5 and the buffer pad 4.

[0048] Among them, the fastener 5 refers to the structural component that is fixed to the edge of the shell opening 11a by means of mechanical connection. Specifically, it can be implemented by a metal frame with threaded holes or a plastic buckle structure. Its function is to provide stable installation support for the screen and limit displacement.

[0049] Specifically, during assembly, the buffer pad 4 is pre-attached to the inner edge of the opening 11a of the main unit housing 1. The screen is then inserted into the opening 11a, with its edges contacting the buffer pad 4. The fixing member 5 is installed on the outer edge of the opening 11a via a snap-fit ​​or screw connection. By adjusting the tightness of the fixing member 5, the screen is evenly pressed between the buffer pad 4 and the fixing member 5. Thus, the screen is constrained by the elastic support of the buffer pad 4 and the rigid restraint of the fixing member 5, preventing the screen from shifting due to vibration and avoiding stress concentration during installation that could lead to screen breakage.

[0050] By combining the buffer pad 4 and the fastener 5, the screen installation stability is ensured while the vibration energy is effectively attenuated. This solves the problem of poor impact resistance of the screen installation structure, reduces the risk of screen damage caused by mechanical vibration, simplifies the screen disassembly and maintenance process, and improves equipment reliability.

[0051] In one embodiment of the present invention, the anesthesia depth monitor 1000 further includes a speaker assembly 6, which is disposed in the first mounting cavity and electrically connected to the screen.

[0052] The speaker assembly 6 refers to the device used to output sound signals. Specifically, it can be implemented using a speaker module with a magnetic shielding structure. Electromagnetic isolation design can reduce interference to the screen. Electrical connection refers to signal transmission through a flexible circuit board or shielded cable. Specifically, it can use a connection interface with filtering function to suppress the interference of electromagnetic noise generated by power supply 3 on the audio signal.

[0053] Specifically, the speaker assembly 6 is integrated into the first mounting cavity formed by the main unit housing 1. This cavity forms an independent heat dissipation airflow through the air inlet 13a and the air outlet 12a. When the screen displays anesthesia depth data, an electrical signal is synchronously transmitted to the speaker assembly 6 through a shielded circuit, triggering the sound prompt function. Since the speaker assembly 6 and the power supply 3 are located in the first mounting cavity and the second mounting cavity respectively, and are physically isolated from each other by the mounting wall, electromagnetic interference paths are effectively blocked.

[0054] By optimizing the structural layout, an electromagnetic isolation environment is constructed while maintaining heat dissipation efficiency, enabling the sound prompt function and screen display to work in a coordinated manner. This achieves the function of synchronous sound output of anesthesia depth monitoring data, maintains the clarity of audio signals in complex electromagnetic environments, and avoids sound prompt delays or errors caused by electromagnetic interference. At the same time, the original heat dissipation structure is used to maintain the working temperature stability of speaker assembly 6.

[0055] In one embodiment of this invention, the screen is a capacitive screen. Specifically, it can be a seven-inch DSI capacitive screen.

[0056] Capacitive touchscreens are display devices that use human body current sensing for touch operation. Specifically, they can be implemented using projected capacitive sensing technology, with a transparent electrode layer covering the surface and connected to a control circuit. This technology reduces the number of electromagnetic interference sources by eliminating mechanical contact, while enhancing the anti-interference capability of touch operation. Multi-touch functionality is achieved through a cross-arranged electrode matrix, specifically using self-capacitance or mutual capacitance detection methods. This function allows medical personnel to directly perform combined operations such as zooming and swiping on the monitoring parameter interface.

[0057] Specifically, the capacitive touchscreen forms an electromagnetic shielding layer with the main unit housing 1 via an insulating glass substrate, effectively blocking conducted interference generated by the power supply 3. The touch signal processing circuitry is integrated within the screen module, employing differential signal transmission to eliminate common-mode interference. During device operation, the capacitive touchscreen's driving frequency is set outside the operating frequency band of the power supply 3 to prevent harmonic interference from affecting the accuracy of EEG signal acquisition. A grounding ring is placed at the screen edge to further reduce interference from the edge electric field on the internal circuitry. In some specific implementations, the capacitive touchscreen surface can be covered with an anti-fingerprint coating to maintain operational sensitivity, and the drive circuit board can be located on the back of the screen module and connected to the host via a flexible circuit board. The thickness of the screen protective glass can be controlled within the range of 1.1 mm to 1.8 mm, ensuring both touch sensitivity and meeting the impact resistance requirements of medical devices.

[0058] Compared to existing technologies, traditional anesthesia monitors mostly use resistive touchscreens, whose conductive metal layers are susceptible to electromagnetic interference from the power supply 3, leading to accidental touches. Furthermore, the need for pressure during operation affects ease of use. The capacitive touchscreen used in this solution not only possesses higher electromagnetic compatibility, but its non-contact operation also avoids frictional static electricity between the screen and the housing, helping to maintain the cleanliness of the device's internal components. Through the above technical solution, this application effectively reduces the electromagnetic coupling effect between the screen assembly and the power supply 3, improving the signal-to-noise ratio of the EEG signal acquisition system to clinical application standards. The sensitive touch response of the capacitive touchscreen allows medical personnel to operate the system accurately even while wearing medical gloves, with touch accuracy error controlled within ±0.5 mm, meeting the reliability requirements of human-computer interaction in medical equipment.

[0059] In one embodiment of this utility model, the buffer pad 4 is made of rubber.

[0060] Among them, the buffer pad 4 refers to the elastic component set between the host housing 1 and the screen. It can be made of vulcanized rubber or silicone rubber, and its elastic modulus range can be adapted to different installation gap requirements. Rubber material refers to a material based on high molecular polymers, which can be made of natural rubber or synthetic rubber. Its molecular chain structure gives the material high resilience and energy absorption capacity.

[0061] Among them, the buffer pad 4 refers to the elastic component set between the host housing 1 and the screen. It can be made of vulcanized rubber or silicone rubber, and its elastic modulus range can be adapted to different installation gap requirements. Rubber material refers to a material based on high molecular polymers, which can be made of natural rubber or synthetic rubber. Its molecular chain structure gives the material high resilience and energy absorption capacity.

[0062] Compared to existing technologies, traditional patient monitors often use rigid plastics or foam materials as cushioning media. The former lacks elastic cushioning capacity, making the screen prone to cracking, while the latter is prone to plastic deformation under long-term pressure. Rubber materials, on the other hand, maintain appropriate hardness while also possessing deformation recovery properties. This avoids stress concentration caused by rigid contact and maintains structural stability during long-term use.

[0063] Through the above technical solution, this application effectively blocks the transmission of equipment operation vibration to the screen, prevents friction damage between the screen and the housing due to frequent vibration, and maintains the assembly stability of the screen components through elastic support, avoiding screen displacement problems caused by aging of the buffer material.

[0064] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An anesthesia depth monitor, characterized in that, include: A main unit housing, wherein the main unit housing has a first mounting cavity and an opening communicating with the first mounting cavity; The side wall of the main housing away from the opening is a mounting wall, and the mounting wall has a recess. A screen, which is detachably connected to the main unit housing and located at the opening; A back cover, which is detachably connected to the mounting wall and surrounds the recess to form a second mounting cavity; as well as A power supply, which is located in the second mounting cavity and is electrically connected to the screen; The mounting wall has an air inlet and an air outlet that communicate with the first mounting cavity. The air inlet is located below the second mounting cavity, and the air outlet is located above the second mounting cavity.

2. The anesthesia depth monitor as described in claim 1, characterized in that, The main unit housing includes a front shell, an adapter shell, and a rear shell connected in sequence; The opening is formed in the front shell, and the recess is formed in the rear shell; the air inlet is formed in the bottom wall of the rear shell, and the air outlet is formed in the side wall of the adapter shell facing the rear shell.

3. The anesthesia depth monitor as described in claim 2, characterized in that, The air inlet hole penetrates the bottom wall and side wall of the rear shell to connect the first mounting cavity, the second mounting cavity, and the outside, respectively.

4. The anesthesia depth monitor as described in claim 2, characterized in that, The adapter shell has a handle protruding in the direction away from the front shell for the user to hold.

5. The anesthesia depth monitor as described in claim 4, characterized in that, The air inlet is formed below the handle.

6. The anesthesia depth monitor as described in claim 1, characterized in that, The anesthesia depth monitor also includes a buffer pad, which is sandwiched between the main unit housing and the screen.

7. The anesthesia depth monitor as described in claim 6, characterized in that, The anesthesia depth monitor also includes a fixing component, which is detachably connected to the periphery of the opening, and the screen is sandwiched between the fixing component and the buffer pad.

8. The anesthesia depth monitor as described in claim 1, characterized in that, The anesthesia depth monitor also includes a speaker assembly, which is located in the first mounting cavity and electrically connected to the screen.

9. The anesthesia depth monitor as described in any one of claims 1 to 8, characterized in that, The screen is a capacitive touchscreen.

10. The anesthesia depth monitor as described in claim 6 or 7, characterized in that, The cushioning pad is made of rubber.

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