External multifunctional anesthetic gas carbon dioxide absorber

Abstract

The utility model discloses an external multi -functional anaesthetic gas carbon dioxide absorber, the left and right sides of absorber are equipped with air inlet channel and air outlet channel respectively, one way of air inlet channel passes through carbon dioxide primary absorption chamber, gas shunt chamber, carbon dioxide secondary absorption chamber, humid heat exchange chamber and is communicated with air outlet channel, and the other way passes through carbon dioxide primary absorption chamber, gas shunt chamber, anaesthetic gas absorption chamber, humid heat exchange chamber and is communicated with air outlet channel, be equipped with the ventilation switch mechanism of anaesthetic gas absorption chamber switch below anaesthetic gas absorption chamber, compare with prior art, the utility model discloses absorber adopts double airway structure, can carry out carbon dioxide's absorption when operating, carries out anaesthetic gas's absorption after operation, and U -shaped carbon dioxide absorption channel can carry out carbon dioxide secondary high -efficient absorption, and identification is more simple and convenient, and gas shunt chamber can carry out heat dissipation cooling, and humid heat exchange chamber can guarantee patient inhaled gas's temperature and humidity.

Description

Technical Field

[0001] This utility model relates to the field of medical device consumables, and in particular to an external multifunctional anesthetic gas carbon dioxide absorber. Background Technology

[0002] Carbon dioxide absorbents are an indispensable core component of the closed-circuit system in modern anesthesia machines. During general anesthesia, the patient's exhaled air contains 4-6% carbon dioxide. If this gas is not effectively removed in time and is re-inhaled through the tubing, it will lead to severe hypercapnia and respiratory acidosis. Carbon dioxide absorbents (usually soda lime or calcium lime) effectively absorb the exhaled carbon dioxide through acid-base neutralization, ensuring the normal conduct of general anesthesia. During postoperative suturing, although the output of anesthetic gas is stopped, the respiratory circuit still needs to continue oxygenation. Residual anesthetic gas in the patient's body continues to circulate in the loop, leading to prolonged recovery time. Therefore, it is necessary to remove residual anesthetic gas from the patient's body as quickly as possible to shorten the recovery time.

[0003] In existing technologies, the acid-base neutralization reaction is typically achieved by placing a carbon dioxide canister filled with carbon dioxide absorbent inside the anesthesia machine, absorbing carbon dioxide gas from the breathing circuit tubing. The carbon dioxide absorbent contains a color-changing indicator; after absorbing carbon dioxide, it changes from white to purple or from pink to white. The effectiveness of the absorbent is determined by visually observing the color change. During postoperative suturing, an additional anesthetic gas absorber containing activated carbon particles is connected to the tubing to remove any residual anesthetic gas from the patient's body.

[0004] The clinical challenges of built-in carbon dioxide canisters are: repeated use by multiple patients, posing a risk of hospital-acquired infections; dust contamination of the operating room and ward environment during carbon dioxide absorbent replacement, endangering the health of medical staff; lack of canister versatility, requiring dedicated canisters and machines; and difficulty in intraoperative replacement, posing risks and safety hazards.

[0005] Among the many technological improvements, the external multifunctional anesthetic gas carbon dioxide absorber has outstanding technical advantages: it overcomes the dust pollution during carbon dioxide absorbent replacement, allows for convenient and quick replacement during surgery, eliminates the risk of hospital-acquired infections, and solves the problem of the versatility of absorbent canisters.

[0006] Clinical applications have shown that carbon dioxide absorbents release a significant amount of heat during acid-base neutralization reactions, leading to increased gas temperature in the closed-loop system. This affects patient compliance with inhalation, and excessively high gas temperatures can harm patients and even damage delicate sensors in the anesthesia machine. Therefore, whether internal or external, carbon dioxide absorbent canisters often incorporate cooling devices or filters (commonly known as artificial noses) into the gas circulation loop to regulate the heat-moisture ratio of the inhaled gas, preventing excessively high temperatures from returning to the patient's breathing mask and ensuring the safety of patients under general anesthesia. However, excessive additional equipment complicates on-site connections and increases medical costs.

[0007] An external carbon dioxide absorber, see CN201510155792.4, has a cylindrical structure that is difficult to grip during installation and use, especially when changing the absorber during a stressful surgical procedure. The difficulty in gripping or the instability of the grip can pose a risk to patient safety.

[0008] A carbon dioxide absorber device with an artificial nose filter (see CN202420426427.7) aims to retain the temperature and humidity of exhaled air while isolating bacteria and viruses in the air to avoid cross-infection by placing an artificial nose at the air outlet. However, because the artificial nose is inserted into the absorber's air outlet, the risk of dislodgement and leakage increases, further increasing medical costs and economic burden.

[0009] Some existing carbon dioxide absorbers also have internal baffles or gas guiding structures to ensure even distribution of the gas entering the absorber and better contact with the carbon dioxide adsorbent, thereby improving adsorption efficiency. However, due to structural and gas channel design limitations, they can only adsorb carbon dioxide and not anesthetic gases; they also fail to address the issue of gas temperature rise and dissipation, posing potential safety hazards; and the cylindrical, multi-compartment structure even makes it extremely inconvenient for anesthesiologists to observe color changes of the absorbent inside the absorber. Utility Model Content

[0010] The purpose of this invention is to provide an external multifunctional anesthetic gas carbon dioxide absorber that solves the above-mentioned problems.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an external multifunctional anesthetic gas carbon dioxide absorber, comprising a square absorber, with an inlet channel and an outlet channel respectively provided on the left and right sides of the absorber. A movable horizontal partition is provided inside the absorber, dividing it into an upper filtration chamber and a lower gas distribution chamber. A vertical partition is provided inside the filtration chamber, dividing it from right to left into a primary carbon dioxide absorption chamber, a secondary carbon dioxide absorption chamber, and an anesthetic gas absorption chamber. A heat exchange chamber is provided above the secondary carbon dioxide absorption chamber and the anesthetic gas absorption chamber. One inlet channel connects to the outlet channel through the primary carbon dioxide absorption chamber, the gas distribution chamber, the secondary carbon dioxide absorption chamber, and the heat exchange chamber; the other inlet channel connects to the outlet channel through the primary carbon dioxide absorption chamber, the gas distribution chamber, the anesthetic gas absorption chamber, and the heat exchange chamber. A ventilation switch mechanism for opening and closing the anesthetic gas absorption chamber is provided below the anesthetic gas absorption chamber.

[0012] Preferably, the primary and secondary carbon dioxide absorption chambers are filled with calcium lime, and the anesthetic gas absorption chamber is filled with activated carbon particles. The ventilation of the anesthetic gas absorption chamber is much greater than that of the secondary carbon dioxide absorption chamber.

[0013] Preferably, the top and bottom of the primary carbon dioxide absorption chamber, the secondary carbon dioxide absorption chamber, and the anesthetic gas absorption chamber are all lined with a breathable polymer material, and the bottom of the gas diversion chamber is lined with a moisture-absorbing polymer material.

[0014] Preferably, the front and rear sides of the upper part of the absorber are recessed inward to form a handle that is easy to grip, and the air inlet channel and the air outlet channel are both located inside the handle.

[0015] Preferably, a gas equalization pipe is vertically installed in the primary carbon dioxide absorption chamber. The gas equalization pipe is H-shaped, with an open upper end and a closed lower end. Gas outlet holes are opened on the pipe wall, and the gas outlet holes face the left and right sides of the primary carbon dioxide absorption chamber.

[0016] Preferably, a gas guide pipe is vertically installed in the carbon dioxide secondary absorption chamber. The gas guide pipe has a flat elliptical cylindrical structure, and multiple gas outlet holes are opened on the surrounding walls of the gas guide pipe, with the number of gas outlet holes decreasing sequentially from bottom to top.

[0017] Preferably, the gas diversion chamber is also vertically provided with a lower partition, which divides the left side of the gas diversion chamber into a carbon dioxide reabsorption chamber. The carbon dioxide reabsorption chamber is located directly below the anesthetic gas absorption chamber. A ventilation hole is provided on the movable transverse partition between the carbon dioxide reabsorption chamber and the anesthetic gas absorption chamber. The ventilation switch mechanism is located on the lower partition.

[0018] Preferably, the ports of the air inlet and air outlet channels are also provided with sealing caps, which are detachably connected to the absorber.

[0019] Preferably, the absorber is provided with a gas sampling connector at the top, which is connected to the interior of the heat and humidity exchange chamber, and the gas sampling connector is a standard Luer connector.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] (1) The absorber of this utility model adopts a dual-airway multi-chamber structure, which can absorb carbon dioxide and anesthetic gas more efficiently. The absorber consists of a carbon dioxide absorption chamber and an anesthetic gas absorption chamber, forming a dual-airway multi-chamber structure, which can not only absorb carbon dioxide, but also adsorb anesthetic gas. The first and second carbon dioxide absorption chambers are used to absorb carbon dioxide exhaled by the patient during the operation; the third carbon dioxide absorption chamber and the anesthetic gas absorption chamber are used to more effectively absorb carbon dioxide and residual anesthetic gas in the mixed gas exhaled by the patient when suturing is performed after the operation, which speeds up the patient's awakening time and is conducive to the patient's recovery and the turnover rate of the operating room.

[0022] (2) The absorber described in this utility model adopts a dual-airway multi-chamber structure, which is more conducive to improving the color change identification of the absorbent. Anesthesiologists can judge the effectiveness of the absorbent by observing the color change of the carbon dioxide absorbent in the first carbon dioxide absorption chamber and the second carbon dioxide absorption chamber, making the identification more intuitive and convenient.

[0023] (3) The gas diversion chamber of this utility model is equipped with a guide plate, which has the significant advantages of low gas resistance and heat dissipation and cooling. The U-shaped gas channel composed of the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the gas diversion chamber fully ensures the secondary efficient absorption of carbon dioxide gas; the guide plate of the gas diversion chamber helps to reduce slack flow, reduce gas resistance and heat dissipation and cooling. It is not only the physical channel for gas to flow from the first carbon dioxide absorption chamber to the second carbon dioxide absorption chamber, but also the air intake channel for the anesthetic gas absorption chamber.

[0024] (4) The heat exchange chamber described in this utility model can effectively regulate the temperature and humidity of the gas and filter dust. The upper part of the second carbon dioxide absorption chamber is separated by the heat exchange chamber. Through the design of the heat exchange chamber, the filter filled with heat exchange filter is integrated into the absorber. The gas sent by the anesthesia machine is adsorbed by the carbon dioxide absorbent and activated carbon particles, and then enters the outlet channel through the filter. This not only effectively regulates the temperature and humidity of the gas flowing out of the outlet channel, but also filters the dust in the gas, which greatly improves the safety of the gas inhaled by the patient, avoids cross-infection, and better ensures the safety of the absorber. At the same time, it avoids the cost and risk of installing an artificial nose separately and reduces medical costs.

[0025] (5) The pressing knob described in this utility model ensures the realization of the dual airway function. A ventilation switch mechanism is set in the gas diversion chamber. Through the structural design of the ventilation switch mechanism, the functions of carbon dioxide absorption during surgery and adsorption of anesthetic gas after surgery can be freely switched. An airtight structure is adopted to avoid cross-contamination and leakage between the dual airway structures in the absorber. A locking piece is also provided on the outer wall of the absorber to prevent accidental operation of the pressing knob, which further ensures the safe switching and realization of the dual airway function.

[0026] (6) The absorber described in this utility model has a rectangular structure, large capacity and long operating time. The added second carbon dioxide absorption chamber increases the storage space of the absorber, which can hold more adsorbent and work continuously for a longer time, meeting the needs of some longer surgeries without the need to frequently change the absorber during the operation.

[0027] (7) The gas output end of the absorber described in this utility model is equipped with a gas sampling connector, which is conducive to real-time monitoring and improves the security level. By sampling and monitoring the gas output from the absorber, it can be determined whether the gas discharged by the absorber meets the standard. When the monitored value is lower or higher than the set threshold, an alarm is triggered. It is low in cost and highly effective.

[0028] (8) The absorber of this utility model is composed of an upper box and a lower box. The end faces of the upper box and the lower box are fixed by ultrasonic welding or bonding to form a primary seal. The upper port of the lower box is provided with a ring of air-sealing protrusions. The air-sealing protrusions are closely attached to the inner side of the upper box to form a secondary seal. The two seals form an L-shaped double sealing surface between the upper box and the lower box, which enhances the airtightness of the connection between the boxes, allows the gas to be filtered more efficiently in the container, and ensures that the anesthetic gas in the absorber will not leak out during the operation.

[0029] (9) The present invention designs the semi-circular shape of the inlet and outlet air pipe as the handle of the absorber, which makes it easy for doctors to grasp and install and remove the absorber. At the same time, it is aesthetically pleasing, comfortable and ergonomic.

[0030] In summary, the absorber of this invention adopts a dual-airway, multi-chamber structure, which increases capacity, allows for the storage of more carbon dioxide absorbent, and extends the absorber's service life. By switching the airways using a pressing knob, it achieves two working modes: carbon dioxide absorption and anesthetic gas adsorption. The inclusion of a heat and humidity exchange chamber and a gas sampling connector enables effective control and monitoring of gas temperature and humidity. This significantly improves the absorber's working efficiency, enhances safety, and reduces medical costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the internal structure of Product 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of the external structure of product 1 of this utility model;

[0033] Figure 3 This is a schematic diagram of the internal structure of product 2 of this utility model;

[0034] Figure 4 This is a schematic diagram of the external structure of product 2 of this utility model;

[0035] Figure 5 This is a schematic diagram of the internal structure of product 3 of this utility model;

[0036] Figure 6 This is a schematic diagram of the external structure of product 3 of this utility model;

[0037] Figure 7 This is an enlarged schematic diagram of part A of the present invention;

[0038] Figure 8 This is a schematic diagram of the ventilation switch mechanism of this utility model in the closed state;

[0039] Figure 9 This is a schematic diagram of the ventilation switch mechanism of this utility model in the pressed-open state;

[0040] Figure 10 This is a schematic diagram of the air guide tube of this utility model;

[0041] Figure 11 This is a schematic diagram of the gas equalization tube of this utility model;

[0042] Figure 12 This is a schematic diagram of the structure of the movable transverse partition of this utility model.

[0043] In the diagram: 1. Absorber; 11. Movable horizontal partition; 12. Vertical partition; 13. Upper box; 14. Lower box; 15. Airtight protrusion; 16. Mounting groove; 17. Strip-shaped insertion groove;

[0044] 2. First carbon dioxide absorption chamber; 22. Gas equalization tube; 3. Gas diversion chamber; 31. High-molecular moisture-absorbing material; 32. Lower partition; 33. Guide plate; 34. Third carbon dioxide absorption chamber; 4. Second carbon dioxide absorption chamber; 41. Gas guide tube; 42. Gas outlet; 43. Positioning slot; 44. Positioning groove; 45. Oval insertion slot; 5. Anesthetic gas absorption chamber; 6. Moisture and heat exchange chamber; 7. Gas outlet channel; 8. Gas inlet channel;

[0045] 9. Ventilation switch mechanism; 91. Positioning slider; 92. Press knob; 93. Sliding guide port; 94. Annular gas seal ring; 95. Gas seal ring;

[0046] 10. Gas sampling connector; 101. Handle; 102. Sealing cap; 103. High-molecular breathable material; 104. Locking plate; 105. RFID electronic tag; 106. Metal hanging ring. Detailed Implementation

[0047] The present invention will be further described below.

[0048] Example: An external multifunctional anesthetic gas carbon dioxide absorber, see [link / reference] Figure 1 and Figure 2 The absorber 1 is square and can hold more carbon dioxide absorbent than existing cylindrical absorbers 1. The absorber 1 consists of an upper box 13 and a lower box 14, with a movable horizontal partition 11 between them. This partition divides the absorber 1 into an upper gas absorption chamber and a lower gas distribution chamber 3. A vertical partition 12 divides the gas absorption chamber from right to left into a first carbon dioxide absorption chamber 2, a second carbon dioxide absorption chamber 4, and an anesthetic gas absorption chamber 5. Ventilation holes are provided on the movable horizontal partition 11 below the first carbon dioxide absorption chamber 2, the second carbon dioxide absorption chamber 4, and the anesthetic gas absorption chamber 5. A ventilation switch 9 for switching the anesthetic gas absorption chamber 5 is located on the left side of the gas distribution chamber 3. A movable ventilation switch 9 is located at the top of the first carbon dioxide absorption chamber 2, the second carbon dioxide absorption chamber 4, and the anesthetic gas absorption chamber 5. A filter plate is installed in the gas absorption chamber 3. A heat exchange chamber 6 is provided above the filter plate of the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5. An exhaust channel 7 and an intake channel 8 are respectively provided on the left and right sides of the upper part of the absorber 1. The intake channel 8 is connected to the upper part of the first carbon dioxide absorption chamber 2 through the filter plate. The second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 are connected to the exhaust channel 7 through the heat exchange chamber 6. The heat exchange chamber 6 is filled with heat exchange filter sheets. An RFID electronic tag 105 and a gas sampling connector 10 are provided on the top of the absorber 1. The gas sampling connector 10 is connected to the internal space of the heat exchange chamber 6. The RFID electronic tag 105 records relevant information about the specifications and model of the absorber 1 and the carbon dioxide absorbent it contains. The RFID electronic tag 105 and the gas sampling connector 10 are essential conditions for intelligent monitoring and management.

[0049] The sampling connector 10 provided on the top of the absorber 1 is a standard Luer connector, which serves as the connection point for gas sampling by the external sampling tube.

[0050] This invention relates to a carbon dioxide absorption channel, which is a U-shaped gas channel composed of a first carbon dioxide absorption chamber 2, a second carbon dioxide absorption chamber 4, and a gas diversion chamber 3. It is used to absorb carbon dioxide exhaled by the patient during surgical anesthesia. The first carbon dioxide absorption chamber 2 is responsible for the primary absorption of carbon dioxide, while the second carbon dioxide absorption chamber 4 performs secondary absorption of any incompletely adsorbed carbon dioxide. These two absorption zones ensure efficient secondary absorption of carbon dioxide. The carbon dioxide absorption airway employs a U-shaped, segmented, two-stage absorption method. Anesthesiologists can more accurately assess the effectiveness of the carbon dioxide absorbent by observing the color change of the absorbent in the second absorption chamber 4. Since the first absorption chamber 2 absorbs carbon dioxide and changes color first, its color remains largely unchanged after absorption. The second absorption chamber 4 absorbs carbon dioxide and changes color subsequently. This U-shaped channel design allows anesthesiologists to easily compare the color change of the absorbent in the first absorption chamber 2 with that in the second absorption chamber 4, thus understanding the carbon dioxide absorption status without the need for a color chart. This makes identification simpler and more convenient. Furthermore, in the early stages of surgery, as long as the absorbent in the second absorption chamber 4 does not change color, doctors do not need to worry about excessive carbon dioxide levels, allowing them to perform the surgery with peace of mind. Simultaneously, the addition of the second absorption chamber 4 allows the absorber 1 to hold more carbon dioxide absorbent, significantly increasing its adsorption capacity. This can meet the needs of longer surgeries and reduce the risk of frequent replacements of absorber 1 during surgery.

[0051] The U-shaped carbon dioxide absorption airway has a gas diversion chamber 3 in the middle, which is equipped with a gas guide plate. This low-resistance heat dissipation and cooling channel is used for gas to flow from the first carbon dioxide absorption chamber 2 to the second carbon dioxide absorption chamber 4, reducing the mutual influence between the first and second carbon dioxide absorption chambers 2 and 4. Moreover, the gas diversion chamber 3 is hollow inside and does not contain carbon dioxide absorbent. There is no chemical reaction and no heat generation, providing a natural cooling space for the gas circulation process. This allows the heat generated by the chemical reaction in the first carbon dioxide absorption chamber 2 to be released and cooled. In this invention, a polymer moisture-absorbing material 31 is laid at the bottom of the gas diversion chamber 3, which can absorb the moisture in the gas flowing through the gas diversion chamber 3, reduce the moisture entering the second carbon dioxide absorption chamber 4, and reduce the heat generated by the chemical reaction between carbon dioxide and carbon dioxide absorbent. At the same time, the gas diversion chamber 3 can also serve as the air inlet channel 8 of the anesthetic gas absorption chamber 5.

[0052] The upper part of both the carbon dioxide second absorption chamber 4 and the anesthetic gas absorption chamber 5 of this invention is separated by a heat and moisture exchange chamber 6. (See also...) Figure 1The upper part of the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 is connected to the heat and moisture exchange chamber 6, which is connected to the exhaust channel 7. The heat and moisture exchange chamber 6 is integrated into the absorber 1. The heat and moisture exchange chamber 6 is filled with a heat and moisture exchange filter, which is an artificial nose bacterial filter. When the gas delivered by the anesthesia machine is absorbed by the carbon dioxide absorbent and activated carbon, it enters the exhaust channel 7 through the specially designed artificial nose bacterial filter. This ensures the temperature and humidity of the gas inhaled by the patient, isolates bacteria and viruses in the inhaled gas, avoids cross-infection, improves the safety of use, makes the gas inhaled by the patient more comfortable, and reduces the risk of leakage and additional costs caused by external artificial nose filters.

[0053] This invention, through the design of the anesthetic gas absorption chamber 5, forms a dual-airway working mode with the carbon dioxide absorption chamber, enabling the absorption of both carbon dioxide and anesthetic gases.

[0054] The first carbon dioxide absorption chamber 2 and the second carbon dioxide absorption chamber 4 are filled with carbon dioxide absorbent, and the anesthetic gas absorption chamber 5 is filled with activated carbon particles. To facilitate better entry of anesthetic gas into the anesthetic gas absorption chamber 5, the ventilation of the anesthetic gas absorption chamber 5 is made much greater than that of the second carbon dioxide absorption chamber 4 by selecting the size of the activated carbon and carbon dioxide absorbent particles. When the ventilation switch mechanism 9 opens the ventilation port at the bottom of the anesthetic gas absorption chamber 5, due to the larger size of the activated carbon particles, the ventilation of the anesthetic gas absorption chamber 5 is good and the air resistance is small, making it easier for gas to enter the anesthetic gas absorption chamber 5. The anesthetic gas exhaled by the patient's lungs and the anesthetic gas remaining in the tubing are more quickly adsorbed by the activated carbon particles, reducing or even completely eliminating the anesthetic gas in the closed circulation loop, shortening the patient's awakening time, protecting the patient's nerves, and making it safer.

[0055] As a preferred option, there are three product options for the design of the partitioned heat exchange chamber 6. One option is to design two partitioned heat exchange chambers 6, such as Product 1 and Product 2, see [link to product details]. Figure 1 and Figure 3 The carbon dioxide second absorption chamber 4 and the anesthetic gas absorption chamber 5 are respectively discharged from the outlet channel 7 after passing through the upper anesthetic gas absorption chamber 5. Alternatively, an anesthetic gas absorption chamber 5 can be designed, as in product 3, see [link to product 3]. Figure 5 The carbon dioxide second absorption chamber 4 and the anesthetic gas absorption chamber 5 share a heat exchange chamber 6. This sharing is achieved simply by creating a vent at the top of the vertical partition 12 on the side of the anesthetic gas absorption chamber 5, connecting it to the heat exchange chamber 6. The shape of the heat exchange chamber 6 can also be optimized as needed; it can be square, inverted trapezoidal, or triangular, as detailed in the relevant sections. Figure 1 , Figure 3 and Figure 5 .

[0056] To enable the switching of the anesthetic gas absorption chamber 5 during and after surgery to absorb anesthetic gas, the gas diversion chamber 3 is equipped with a ventilation switch mechanism 9 that opens and closes the ventilation port. The design of the ventilation switch mechanism 9 is particularly important in order to prevent the leakage of anesthetic gas from the absorber 1 and to prevent cross-contamination between the dual airway structure of the anesthetic gas absorption chamber 5 and the carbon dioxide absorption chamber. The ventilation switch mechanism 9 can open the activated carbon airway in a timely manner according to the progress of the surgery to absorb residual anesthetic gas.

[0057] Two schemes were adopted for the design of the ventilation switch mechanism 9:

[0058] Ventilation switch mechanism, Scheme 1, see [link / reference] Figure 5 The ventilation switch mechanism 9 mainly consists of a push-button knob 92 and a positioning slider 91. The upper and lower ends of the positioning slider 91 are slidably connected to the movable transverse partition 11 and the absorber 1, respectively. Multiple ventilation ports are correspondingly opened on the top surface of the positioning slider 91 and on the movable transverse partition 11 below the anesthetic gas absorption chamber 5. During surgery, see... Figure 8 and Figure 9 When the button 92 is in the initial position, the vent on the positioning slider 91 is misaligned with the vent on the movable transverse partition 11, preventing air from entering the anesthetic gas absorption chamber 5. After the surgery, when suturing, simply press the button 92 inward, and the positioning slider 91 slides to the designated position. The vent on the positioning slider 91 is now aligned with the vent on the movable transverse partition 11, and the vent is open. The gas containing anesthetic gas can then smoothly enter the anesthetic gas absorption chamber 5, where activated carbon adsorbs and removes the anesthetic gas. To achieve directional sliding of the positioning slider 91, a guide groove matching the lower end of the positioning slider 91 is provided on the inner bottom surface of the absorber 1, and a dovetail groove matching the upper end of the positioning slider 91 is provided on the bottom surface of the movable transverse partition 11.

[0059] Regarding the airtight design of the ventilation switch mechanism 9: In order to ensure that anesthetic gas will not enter the anesthetic gas absorption chamber 5 when the ventilation port is not open, an annular airtight ring 94 is provided around the ventilation port on the movable transverse partition 11. The annular airtight ring 94 is located between the positioning slider 91 and the movable transverse partition 11, and the airtightness between the positioning slider 91 and the movable transverse partition 11 is achieved by the annular airtight ring 94.

[0060] Ventilation switch mechanism 9, Scheme 2, see Figure 1 and Figure 3A third carbon dioxide absorption chamber 34 is added inside the gas diversion chamber 3 below the absorber 1. A lower partition 32 is also vertically installed inside the gas diversion chamber 3, which divides the left side of the gas diversion chamber 3 into the third carbon dioxide absorption chamber 34. The third carbon dioxide absorption chamber 34 is located directly below the anesthetic gas absorption chamber 5. A ventilation hole is opened on the movable transverse partition 11 between the third carbon dioxide absorption chamber 34 and the anesthetic gas absorption chamber 5. The ventilation switch mechanism 9 mainly consists of a pressing knob 92 and a positioning slider 91. The upper and lower ends of the positioning slider 91 are slidably connected to the lower partition 32, respectively. Multiple ventilation ports are correspondingly opened on the positioning slider 91 and the lower partition 32. During surgery, the pressing knob 92 is in the initial position, and the ventilation ports on the positioning slider 91 and the lower partition 32 are misaligned, so the anesthetic gas absorption chamber 5 and the third carbon dioxide absorption chamber 34 cannot be filled with air. When suturing after surgery, simply press the button 92 inwards, and the positioning slider 91 will slide to the designated position. At this time, the vent on the positioning slider 91 is aligned with the vent on the lower partition 32, and the vent is open. The gas in the pipeline first enters the third carbon dioxide absorption chamber, where the carbon dioxide absorbent absorbs the residual carbon dioxide, and then enters the anesthetic gas absorption chamber 5, where the anesthetic gas is removed by activated carbon particles. A sliding limit strip is provided on the side of the positioning slider 91, and a dovetail groove matching the sliding limit strip is provided on the side of the lower partition 32 to achieve a sliding connection between the positioning slider 91 and the lower partition 32.

[0061] Regarding the airtight design of the ventilation switch mechanism 9: In order to ensure that anesthetic gas will not enter the anesthetic gas absorption chamber 5 and the third carbon dioxide absorption chamber 34 when the ventilation port is not open, an annular airtight ring 94 is provided around the ventilation port of the lower partition 32. The annular airtight ring 94 is located between the positioning slider 91 and the lower partition 32, and the airtightness between the positioning slider 91 and the movable transverse partition 11 is achieved by the annular airtight ring 94.

[0062] Since pressing knob 92 requires pressing and sliding, see Figure 8 and Figure 9 To prevent anesthetic gas from leaking out from the mounting point of the pressing knob 92, the lower part of the absorber 1 is provided with a sliding guide port 93 that matches the pressing knob 92. An airtight ring 95 is provided between the sliding guide port 93 and the pressing knob 92. The rear end of the pressing knob 92 is fixedly connected to the front end of the positioning slider 91. Through the design of the sliding guide port 93, the airtight ring 95 is always between the sliding guide port 93 and the pressing knob 92 to form an airtight seal before and after the pressing knob 92 moves, thereby ensuring that the anesthetic gas will not leak.

[0063] To prevent accidental activation of the button 92 and subsequent malfunction of the ventilation switch mechanism 9, a locking piece 104 is provided on the outer wall of the absorber 1 to prevent accidental activation of the button 92. (See attached image) Figure 2 , Figure 4 and Figure 6 The locking plate 104 is slidably connected to the outer shell of the absorber 1 in the middle. The right end of the locking plate 104 is provided with a pull handle, and the left end of the locking plate 104 is provided with a limiting slot that matches the pressing knob 92. The locking plate 104 is locked and limited by the limiting slot with the front end of the pressing knob 92. The locking plate 104 locks the front end of the pressing knob 92 and keeps it in the initial state. When the operation is completed and suturing is performed, simply pull the locking plate 104 to the right to release the pressing knob 92. Press the pressing knob 92 inward to open the gas channel of the anesthetic gas absorption chamber 5 and adsorb the residual anesthetic gas in the circuit.

[0064] The locking plate 104 and the absorber 1 are connected in the following way: a sliding groove is opened in the middle of the locking plate 104, and a limiting screw is provided in the sliding groove. The locking plate 104 is installed and positioned on the absorber 1 by the limiting screw, and is horizontally slidably connected along the surface of the absorber 1 by the limiting screw.

[0065] As a medical auxiliary device, absorber 1 requires high airtightness during the delivery of anesthetic gases during surgery. To achieve the installation design of the internal structure of absorber 1, absorber 1 is composed of an upper box 13 and a lower box 14, see [reference]. Figure 5 and Figure 7 The upper box 13 and the lower box 14 are fixed together by ultrasonic welding or bonding to form a primary seal. The upper end of the lower box 14 is provided with a ring-shaped gas-sealing protrusion 15, which is in close contact with the inner side of the upper box 13 to form a secondary seal. These two seals create an L-shaped double-sealing surface between the upper box 13 and the lower box 14, ensuring the gas tightness of the absorber. The upper end of the lower box 14 is also provided with a mounting groove 16 for installing a movable transverse partition 11. The movable transverse partition 11 is engaged within the mounting groove 16. The design of the mounting groove 16 allows for physical spatial separation between the upper box 13 and the lower box 14, ensuring orderly gas flow.

[0066] The top and bottom of the first carbon dioxide absorption chamber 2, the second carbon dioxide absorption chamber 4, and the anesthetic gas absorption chamber 5 are all covered with a high-molecular breathable material 103. The high-molecular breathable material 103 is a breathable cotton that acts as a breathable filter, while preventing carbon dioxide absorbent and activated carbon dust from entering the gas circulation loop. The bottom of the gas diversion chamber 3 is covered with a high-molecular moisture-absorbing material 31, which is a water-absorbing cotton used to absorb moisture at the bottom of the gas diversion chamber 3.

[0067] To reduce gas flow and reduce gas resistance at the bottom of the first carbon dioxide absorption chamber 2, and to ensure uniform gas intake at the bottom of the second carbon dioxide absorption chamber 4, a guide plate 33 is also provided in the gas distribution chamber 3. (See [reference]) Figure 1 and Figure 3 The guide plate 33 is vertically arranged along the length of the gas diversion chamber 4.

[0068] This invention features a vertically installed gas equalization pipe 22 within the first carbon dioxide absorption chamber 2. (See attached image) Figure 11 The gas equalization pipe 22 is H-shaped, open at the top and closed at the bottom. An outlet (orifice) is provided on the pipe wall of the gas equalization pipe 22, facing the left and right sides of the first carbon dioxide absorption chamber 2. Part of the gas passes through the first carbon dioxide absorption chamber 2 from top to bottom, and part of the gas is blown out to the left and right sides through the gas equalization pipe 22, allowing the carbon dioxide absorbent in the first carbon dioxide absorption chamber 2 to react fully and change color. For the second carbon dioxide absorption chamber 4, this invention provides a vertically installed gas guide pipe 41 inside the second carbon dioxide absorption chamber 4. (See [reference]). Figure 10 The gas guide tube 41 has a flat elliptical cylindrical structure. Since the absorber 1 is square in shape, the flat elliptical gas guide tube 41 structure is more conducive to the gas being sprayed deep into both sides. Multiple gas outlet holes 42 are opened on the surrounding walls of the gas guide tube 41. The number of gas outlet holes 42 decreases from bottom to top, which can reduce the amount of gas discharged from the upper part of the gas guide tube 41, so that the carbon dioxide can be fully reacted in the second carbon dioxide absorption chamber 4.

[0069] To achieve the positioning and installation of the air guide tube 41, a positioning notch 43 is provided at the top end of the air guide tube 41, see [link / reference]. Figure 1 , Figure 3 and Figure 5 The top of the second carbon dioxide absorption chamber 4 is provided with a positioning slot 44 that matches the positioning slot 43, and the movable transverse partition 11 is provided with an elliptical insertion slot 45 that matches the gas guide tube 41. The design of the positioning slot 44 and the elliptical insertion slot 45 facilitates the positioning and installation of the gas guide tube 41. After installation, the gas guide tube 41 can be stably and vertically fixed in the second carbon dioxide absorption chamber 4.

[0070] This invention optimizes the structural composition of the product, facilitating component assembly and production. During installation, the upper box 13 is first flipped over to install the vertical partition 12, followed by filter media filling. Then, the movable horizontal partition 11 is installed onto the lower box 14, and finally, the upper and lower boxes 14 are installed. Because a gap can easily form between the bottom of the vertical partition 12 and the movable horizontal partition 11, causing gas leakage between chambers, this invention provides a strip-shaped insertion groove 17 on the movable horizontal partition 11 that matches the vertical partition 12. (See [reference]). Figure 12The lower ends of the vertical partitions 12 are all inserted into the strip-shaped insertion slots 17. The design of the strip-shaped insertion slots 17 serves to position and install the vertical partitions 12, while also filling the installation gaps and preventing gas from flowing between the chambers.

[0071] To prevent dust from entering the absorber 1 through the inlet channel 8 and outlet channel 7 and causing secondary pollution, rubber or polymer sealing caps 102 are provided at the ports of the inlet channel 8 and outlet channel 7. These sealing caps are detachably connected to the absorber 1, thus achieving a sealed design for the inlet channel 8 and outlet channel 7 and ensuring the long-term effectiveness of the carbon dioxide absorbent. Simultaneously, to prevent the artificial nose's heat exchange filter from falling out of the outlet channel 7, a baffle is provided inside the outlet channel 7 to prevent the filter from detaching. The baffle has ventilation holes to facilitate gas flow. Ventilation holes are also provided on the vertical partition 12 between the heat exchange chamber 6 and the second carbon dioxide absorption chamber 4 to facilitate gas outlet.

[0072] The upper front and rear sides of the absorber 1 are recessed inward to form a handle 101 for easy gripping. The handle 101 facilitates the doctor's gripping and installation / removal of the absorber 1. The air inlet channel 8 and air outlet channel 7 are both located inside the handle 101. The semi-circular shape of the air inlet and outlet channels 7 is designed as the grip of the absorber, making full use of the internal space of the handle. The design of the handle does not increase the overall size of the product, making it aesthetically pleasing, comfortable, and ergonomic. The absorber 1 is made entirely of a highly transparent polymer material, making it easier to observe the color change of the carbon dioxide indicator.

[0073] The absorber 1 has two non-penetrating small holes on the upper handle 101. A rotating metal ring 106 is installed on the small holes. The metal ring 106 facilitates the external hanging of the absorber 1 on the anesthesia machine, reducing the load pressure on the gas circuit pipeline.

[0074] In existing technologies, anesthesiologists typically determine the effectiveness of carbon dioxide absorbents and decide whether to replace absorber 1 based on color changes. The absorber 1 of this invention is equipped with a gas sampling connector 10 at its top, which communicates with the interior of the heat and moisture exchange chamber 6. By connecting a professional testing instrument to the gas sampling connector 10, the gas inside the absorber 1 can be sampled and tested, accurately determining whether the gas discharged from the absorber 1 meets the standards. If the gas test results are unsatisfactory, the absorber 1 can be replaced promptly. Before use, the gas sampling connector 10 is sealed with a cap to ensure cleanliness inside the absorber 1. When in use, the cap is removed, and the gas sampling interface of the testing instrument is plugged into the gas sampling connector 10, which is very convenient. After use, the testing instrument is removed, allowing for the recycling of the absorber 1. The gas sampling connector 10 has low design cost, high functionality, and is beneficial for the promotion of digital healthcare.

[0075] The above provides a detailed description of an external multifunctional anesthetic gas carbon dioxide absorber provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, based on the idea of ​​this utility model, there will be changes in the specific implementation and application scope. Changes and improvements to this utility model are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An external multi-functional anesthetic gas carbon dioxide absorber, characterized by: The device includes a square absorber with an outlet channel and an inlet channel on its left and right sides, respectively. A movable horizontal partition inside the absorber divides it into an upper filtration chamber and a lower gas distribution chamber. A vertical partition inside the filtration chamber divides it from right to left into a primary carbon dioxide absorption chamber, a secondary carbon dioxide absorption chamber, and an anesthetic gas absorption chamber. A heat exchange chamber is located above the secondary carbon dioxide absorption chamber and the anesthetic gas absorption chamber. One inlet channel connects to the outlet channel via the primary carbon dioxide absorption chamber, the gas distribution chamber, the secondary carbon dioxide absorption chamber, and the heat exchange chamber; the other inlet channel connects to the outlet channel via the primary carbon dioxide absorption chamber, the gas distribution chamber, the anesthetic gas absorption chamber, and the heat exchange chamber. A ventilation switch mechanism for opening and closing the anesthetic gas absorption chamber is located below the anesthetic gas absorption chamber.

2. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The primary and secondary carbon dioxide absorption chambers are filled with calcium lime, and the anesthetic gas absorption chamber is filled with activated carbon particles. The ventilation of the anesthetic gas absorption chamber is much greater than that of the secondary carbon dioxide absorption chamber.

3. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The top and bottom of the primary carbon dioxide absorption chamber, the secondary carbon dioxide absorption chamber, and the anesthetic gas absorption chamber are all lined with a breathable polymer material, and the bottom of the gas diversion chamber is lined with a moisture-absorbing polymer material.

4. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The front and rear sides of the upper part of the absorber are recessed inward to form a handle that is easy to grip, and the air inlet and outlet channels are both located inside the handle.

5. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 4, characterized in that: The upper part of the absorber has two non-penetrating small holes on the handle, and a rotating metal ring is installed in the small holes.

6. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, wherein: A gas equalization pipe is vertically installed in the primary carbon dioxide absorption chamber. The gas equalization pipe is H-shaped, with an open upper end and a closed lower end. Gas outlet holes are opened on the pipe wall, and the gas outlet holes face the left and right sides of the primary carbon dioxide absorption chamber.

7. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: A gas guide pipe is vertically installed in the carbon dioxide secondary absorption chamber. The gas guide pipe has a flat elliptical cylindrical structure and multiple gas outlet holes are opened on the surrounding walls of the gas guide pipe. The number of gas outlet holes decreases from bottom to top.

8. An external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The gas diversion chamber is also vertically equipped with a lower partition, which divides the left side of the gas diversion chamber into a carbon dioxide reabsorption chamber. The carbon dioxide reabsorption chamber is located directly below the anesthetic gas absorption chamber. A ventilation hole is provided on the movable transverse partition between the carbon dioxide reabsorption chamber and the anesthetic gas absorption chamber. The ventilation switch mechanism is located on the lower partition.

9. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The ports of the air inlet and air outlet channels are also equipped with sealing caps, which are detachably connected to the absorber.

10. The external multi-functional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The absorber is equipped with a gas sampling connector at the top, which is connected to the interior of the heat and humidity exchange chamber. The gas sampling connector is a standard Luer connector.

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