External multifunctional anesthetic gas carbon dioxide absorber

Abstract

The invention relates to the field of medical instrument consumables, and discloses an external multifunctional anesthetic gas carbon dioxide absorber which is characterized in that an upper box body is provided with a first carbon dioxide absorption chamber, a second carbon dioxide absorption chamber, an anesthetic gas absorption chamber, a damp-heat exchange chamber, an electronic tag and a gas sampling hole; the lower box body is provided with a gas distribution chamber and a ventilation switch mechanism, the gas inlet channel is communicated with the first carbon dioxide absorption chamber, and the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are communicated with the gas outlet channel through the damp-heat exchange chamber. Carbon dioxide is absorbed during operation, and anesthetic gas is adsorbed during postoperative resuscitation; sufficient and efficient absorption of carbon dioxide can be ensured, and the color change identification degree is improved; the gas distribution chamber can effectively reduce gas resistance and conduct heat dissipation and cooling, and the damp-heat exchange chamber is arranged, so that the temperature and humidity of circulating gas are effectively regulated and controlled, and the potential dust risk of the gas is blocked.

Description

Technical Field

[0001] The present invention relates to the field of medical device consumables, and in particular to an external multifunctional anesthetic gas carbon dioxide absorber for a closed gas circuit of an anesthesia machine. Background Art

[0002] Carbon dioxide absorbers are an essential core component of the closed-circulation system of modern anesthesia machines. During general anesthesia surgery, the patient's exhaled gas contains 4-6% carbon dioxide. If this gas is not promptly and effectively removed and re-inhaled through the tube, it can lead to severe hypercapnia and respiratory acidosis. Through the acid-base neutralization chemical reaction of carbon dioxide absorbers (usually soda lime or calcium lime), they effectively absorb the patient's exhaled carbon dioxide, ensuring the smooth progress of general anesthesia surgery. During postoperative suturing, even after the delivery of anesthetic gas has been stopped, the breathing circuit must continue to provide oxygen. Residual anesthetic gas in the patient's body continues to circulate in the circuit, prolonging the patient's recovery time. Therefore, it is necessary to expel the residual anesthetic gas from the anesthetized patient's body as quickly as possible to shorten the patient's recovery time.

[0003] In the prior art, a carbon dioxide tank filled with a carbon dioxide absorber is typically built into the anesthesia machine to complete the aforementioned acid-base neutralization chemical reaction, absorbing carbon dioxide gas from the breathing circuit tubing. The carbon dioxide absorber contains a color-changing indicator, which changes from white to purple or pink to white upon carbon dioxide absorption. Visual observation of this color change can be used to determine the effectiveness of the carbon dioxide absorber. During postoperative suturing procedures, an anesthetic gas adsorber filled with activated carbon granules is also required to be connected to the tubing to remove any remaining anesthetic gas from the patient's body.

[0004] The clinical pain points of built-in carbon dioxide tanks are: repeated use by multiple patients poses a risk of hospital infection; when replacing and refilling the carbon dioxide absorbent, dust pollutes the operating room environment and endangers the health of medical staff; the tank body lacks versatility and can only be used for a specific tank and machine; it is difficult to replace during surgery, and there are replacement risks and safety hazards.

[0005] Among the many technical improvements, the external carbon dioxide absorber has more outstanding technical advantages: it overcomes the dust pollution when replacing the carbon dioxide absorbent, can be replaced conveniently and quickly during surgery, has no risk of hospital infection, and solves the versatility problem of the absorbent tank.

[0006] Clinical applications have found that the acid-base neutralization reaction of carbon dioxide absorbers releases a significant amount of heat, causing the gas temperature in the closed circulation loop to rise, affecting the anesthesia patient's compliance with inhalation. Excessive gas temperature can also cause harm to the patient and even damage the delicate sensors of the anesthesia machine. Therefore, in actual use, whether it is an internal or external carbon dioxide absorber, cooling equipment or filters (commonly known as artificial noses) are often added to the gas circulation loop to adjust the humidity-heat ratio of the patient's inhaled gas, prevent excessively high gas temperatures returning to the patient's breathing mask, and ensure the safety of patients undergoing general anesthesia. However, the excessive number of additional devices and the complex connection requirements at the surgical site further increase medical costs.

[0007] An external carbon dioxide absorber, see CN201510155792.4, has a cylindrical structure that is difficult to grasp during installation and use, especially when replacing the absorber during a tense operation. It is difficult to grasp or the grasp is unstable. Any operational inconvenience will pose a risk to patient safety.

[0008] A carbon dioxide absorber device with an artificial nose filter, see CN202420426427.7, incorporates an artificial nose at the air outlet to preserve the temperature and humidity of exhaled air while isolating bacteria and viruses in the air to prevent cross-infection. However, since the artificial nose is plugged into the absorber's air outlet, the risk of detachment and leakage increases, further increasing medical costs and financial burdens.

[0009] Some existing carbon dioxide absorbers also incorporate internal partitions or gas-guiding structures to evenly distribute incoming gas and enhance contact with the carbon dioxide adsorbent, improving adsorption efficiency. However, due to structural and airway design issues, these absorbers only adsorb carbon dioxide, not anesthetic gases. They also fail to address the issue of gas heating and heat dissipation, creating potential operational risks. The cylindrical, multi-partitioned structure also makes it difficult for anesthesiologists to observe color changes in the absorbent within the absorber. Summary of the Invention

[0010] The purpose of the present invention is to provide an external multifunctional anesthetic gas carbon dioxide absorber that solves the above technical defects.

[0011] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an external multifunctional anesthetic gas carbon dioxide absorber, including an absorber, the absorber consisting of an upper box body and a lower box body, a movable horizontal partition is arranged between the upper box body and the lower box body, the movable horizontal partition divides the absorber into an upper gas absorption chamber and a lower gas diversion chamber, a vertical partition is provided in the gas absorption chamber, the vertical partition divides the gas absorption chamber from right to left into a first carbon dioxide absorption chamber, a second carbon dioxide absorption chamber and an anesthetic gas absorption chamber, a vent is provided on the movable horizontal partition arranged below the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber, and a vent for switching the anesthetic gas absorption chamber is provided on the left side of the gas diversion chamber. Gas switch mechanism, the tops of the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are provided with movable filter baffles, the movable filter baffles are clamped in the gas diversion chamber, and a moist heat exchange chamber is provided above the movable filter baffles of the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber. The left and right sides of the upper part of the absorber are respectively provided with an air outlet channel and an air inlet channel, the air inlet channel is connected with the upper part of the first carbon dioxide absorption chamber through the movable filter baffle, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are connected with the air outlet channel through the moist heat exchange chamber, the moist heat exchange chamber is filled with a moist heat exchange filter, the top of the absorber is provided with an RFID electronic tag and a gas sampling connector, and the gas sampling connector is connected with the internal space of the moist heat exchange chamber.

[0012] Preferably, the end faces of the upper box body and the lower box body are fixed by welding or bonding, and the upper port of the lower box body is provided with an annular air-sealing ridge, which is tightly attached to the inner side of the upper box body, so that an L-shaped double sealing surface is formed between the upper box body and the lower box body. The upper end of the lower box body is also provided with an installation groove for facilitating the installation of a movable transverse partition, and the movable transverse partition is snapped into the installation groove.

[0013] Preferably, the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the third carbon dioxide absorption chamber are filled with carbon dioxide absorbent, and the anesthetic gas absorption chamber is filled with activated carbon particles.

[0014] Preferably, the tops and bottoms of the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are paved with polymer filter materials, and the bottom of the gas diversion chamber is paved with polymer moisture-absorbing materials.

[0015] Preferably, the front and rear sides of the upper portion of the absorber are recessed inward to form a handle for the operator to grasp conveniently, and the air inlet channel and the air outlet channel are arranged inside or outside the handle.

[0016] Preferably, two non-penetrating small holes are provided on the handle at the upper part of the absorber, and rotating metal rings are installed on the small holes.

[0017] Preferably, a gas equalizing pipe is vertically provided in the first carbon dioxide absorption chamber. The gas equalizing pipe is H-shaped, with an open upper end and a closed lower end. The pipe wall of the gas equalizing pipe is provided with gas outlet holes (openings), and the gas outlet holes (openings) face the left and right sides of the first carbon dioxide absorption chamber. An air guide pipe is vertically provided in the second carbon dioxide absorption chamber. The air guide pipe has a flat oval structure and is provided with multiple gas outlet holes on the pipe wall. The number of gas outlet holes decreases from bottom to top. The number of gas equalizing pipes and air guide pipes is set as needed.

[0018] Preferably, a positioning bayonet is provided at the top of the air guide tube, a positioning slot matching the positioning bayonet is provided at the top of the second carbon dioxide absorption chamber, and an elliptical socket slot matching the air guide tube is provided on the movable transverse partition.

[0019] Preferably, the ventilation switch mechanism is mainly composed of a pressing knob and a positioning slider, the upper and lower ends of the positioning slider are slidingly connected to the movable transverse partition and the absorber respectively, and a plurality of vents are correspondingly opened on the top surface of the positioning slider and the movable transverse partition below the anesthetic gas absorption chamber, and the vents on the movable transverse partition are surrounded by an annular air-sealing ring, and the annular air-sealing ring is located between the positioning slider and the movable transverse partition. The lower part of the absorber is provided with a sliding guide port matching the pressing knob, and an air-sealing ring is provided between the sliding guide port and the pressing knob, the rear end of the pressing knob is fixedly connected to the front end of the positioning slider, and the outer wall of the absorber is also provided with a locking plate to prevent the pressing knob from being operated accidentally.

[0020] Preferably, the inner bottom surface of the absorber is provided with a guide groove matching the lower end of the positioning slider, and the bottom surface of the movable transverse partition is provided with a dovetail groove matching the upper end of the positioning slider, so as to realize the sliding connection between the positioning slider and the movable transverse partition.

[0021] Preferably, a lower partition is provided on the left side of the gas diversion chamber perpendicular to the bottom surface, and the lower partition divides the left space of the gas diversion chamber into a third carbon dioxide absorption chamber, and the third carbon dioxide absorption chamber is located directly below the anesthetic gas absorption chamber, and a vent is provided on the movable transverse partition between the third carbon dioxide absorption chamber and the anesthetic gas absorption chamber, and the ventilation switch mechanism is mainly composed of a pressing knob and a positioning slider, and the upper and lower ends of the positioning slider are respectively slidably connected to the lower partition, and a plurality of vents are correspondingly provided on the positioning slider and the lower partition, and an annular air sealing ring is provided around the vent of the lower partition, and the annular air sealing ring is located between the positioning slider and the lower partition, a sliding guide port matching the pressing knob is provided at the lower part of the absorber, and an air sealing ring is provided between the sliding guide port and the pressing knob, the rear end of the pressing knob is fixedly connected to the front end of the positioning slider, and a locking plate is also provided on the outer wall of the absorber to prevent the pressing knob from being operated incorrectly.

[0022] Preferably, a sliding limit strip is provided on the side of the positioning slider, and a dovetail groove matching the sliding limit strip is opened on the side of the lower partition to achieve a sliding connection between the positioning slider and the lower partition.

[0023] Preferably, the middle part of the locking plate is slidably connected to the outer shell of the absorber, a pull handle is provided at the right end of the locking plate, and a limit slot matching the press knob is opened at the left end of the locking plate, and the locking plate is limited by the limit slot and the front end of the press knob.

[0024] Preferably, the sliding connection between the locking plate and the absorber is as follows: a sliding groove is horizontally opened in the middle of the locking plate, and a limiting screw is provided in the sliding groove. The locking plate is installed and positioned on the absorber by the limiting screw, and is horizontally slidably connected along the surface of the absorber by the limiting screw.

[0025] Preferably, two or more guide plates are provided on the right side of the gas diversion chamber perpendicular to the bottom surface of the lower box body to reduce gas kicking.

[0026] Preferably, the movable transverse partition is provided with a strip-shaped socket groove that matches the vertical partition, and the lower ends of the vertical partitions are inserted into the strip-shaped socket groove.

[0027] Preferably, a baffle is provided in the air outlet channel to prevent the moisture-heat exchange filter from falling out, and a vent hole is provided on the baffle to facilitate gas circulation.

[0028] Compared with the prior art, the advantages of the present invention are: (1) The absorber of the present invention adopts a dual-airway multi-chamber structure, which can absorb carbon dioxide and anesthetic gas more efficiently. The absorber is composed of a carbon dioxide absorption chamber and an anesthetic gas absorption chamber to form a dual-airway multi-chamber structure, which can not only absorb carbon dioxide but also adsorb anesthetic gas. The first carbon dioxide absorption chamber and the second carbon dioxide absorption chamber are used to absorb carbon dioxide exhaled by the patient during surgery; 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 during suturing at the end of surgery, thereby accelerating the patient's awakening time and facilitating patient recovery and the turnover rate of the operating room.

[0029] (2) The absorber of the present invention adopts a dual-airway multi-chamber structure, which is more conducive to improving the color change recognition of the absorbent. The anesthesiologist can judge the effectiveness of the absorbent by the color change of the carbon dioxide absorbent in the first carbon dioxide absorption chamber and the second carbon dioxide absorption chamber, respectively, making identification more intuitive and convenient.

[0030] (3) The gas diversion chamber of the present invention is provided with a guide plate, which has the significant advantages of low air resistance, heat dissipation and temperature reduction. The U-shaped gas channel formed by 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 is conducive to reducing kicking, lowering air resistance, and heat dissipation and temperature reduction. 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 inlet channel of the anesthetic gas absorption chamber.

[0031] (4) The heat and moisture exchange chamber of the present invention 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 a heat and moisture exchange chamber. Through the design of the heat and moisture exchange chamber, a filter filled with a heat and moisture exchange filter is integrated into the absorber. The gas sent in by the anesthesia machine is adsorbed by the carbon dioxide absorbent and activated carbon particles, and then enters the air outlet channel through the filter. This not only effectively regulates the temperature and humidity of the gas flowing out of the air outlet channel, but also filters the dust in the gas, greatly improving the safety of the patient's inhaled gas and avoiding cross infection. The safety of the absorber is better guaranteed, while avoiding the cost and risk of installing an artificial nose, thereby reducing medical costs.

[0032] (5) The push knob of the present invention ensures the realization of the dual airway function. A ventilation switch mechanism is provided in the gas diversion chamber. Through the structural design of the ventilation switch mechanism, the functions of carbon dioxide absorption during surgery and anesthetic gas adsorption after surgery can be freely switched. The airtight structure is adopted to avoid cross-flow and leakage between the dual airway structures in the absorber. A locking plate is also provided on the outer wall of the absorber to prevent misoperation of the push knob, which further ensures the safe switching and realization of the dual airway function.

[0033] (6) The absorber of the present invention has a rectangular structure, large capacity and long battery life. The addition of a second carbon dioxide absorption chamber increases the storage space of the absorber, which can accommodate more adsorbent and work continuously for a longer time, meeting the needs of some slightly longer surgeries without the need to frequently replace the absorber during the operation.

[0034] (7) The gas output end of the absorber of the present invention is provided with a gas sampling connector, which facilitates real-time monitoring and improves safety and security. By sampling and monitoring the output gas of the absorber, it can be determined whether the gas discharged by the absorber meets the standard. When the monitored value is lower than or higher than the set threshold, an alarm is issued. This is low-cost and effective.

[0035] (8) The absorber of the present invention is composed of an upper box body and a lower box body. The end faces of the upper box body and the lower box body are fixed by ultrasonic welding or bonding to form a primary seal. The upper end of the lower box body is provided with a circle of annular airtight ridges. The airtight ridges are tightly attached to the inner side of the upper box body to form a secondary seal. The two seals form an L-shaped double sealing surface between the upper box body and the lower box body, thereby enhancing the airtightness of the connection between the boxes, allowing the gas to be filtered more efficiently in the container, and ensuring that the anesthetic gas in the absorber will not overflow during the operation.

[0036] (9) The present invention designs the semi-arc shape of the air inlet and outlet pipes into a handle of the absorber, which is convenient for doctors to grasp and install and disassemble the absorber. At the same time, it is beautiful, comfortable and ergonomic.

[0037] In summary, the absorber of the present invention adopts a dual-airway multi-chamber structure, which increases the capacity, can store more carbon dioxide absorbent, and extend the use time of the absorber; by pressing the airway conversion knob, two working modes of carbon dioxide absorption and anesthetic gas adsorption are realized; the provision of a heat and moisture exchange chamber and a gas sampling connector can effectively control and monitor the temperature and humidity of the gas; significantly improves the working efficiency of the absorber, enhances safety, and reduces medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the internal structure of the product 1 of the present invention; Figure 2 This is a schematic diagram of the external structure of the product 1 of the present invention; Figure 3 This is a schematic diagram of the internal structure of the product 2 of the present invention; Figure 4 This is a schematic diagram of the external structure of the product 2 of the present invention; Figure 5 This is a schematic diagram of the internal structure of the product 3 of the present invention; Figure 6 This is a schematic diagram of the external structure of the product 3 of the present invention; Figure 7It is an enlarged schematic diagram of part A of the present invention; Figure 8 This is a structural schematic diagram of the ventilation switch mechanism of the present invention in a closed state; Figure 9 This is a structural diagram of the ventilation switch mechanism of the present invention in a pressed-open state; Figure 10 Schematic diagram of the structure of the airway tube of the present invention; Figure 11 This is a schematic structural diagram of the gas pipe of the present invention; Figure 12 It is a structural schematic diagram of the movable transverse partition of the present invention.

[0039] In the figure: 1, absorber; 11, movable horizontal partition; 12, vertical partition; 13, upper box body; 14, lower box body; 15, airtight rib; 16, mounting groove; 17, strip socket groove; 2. First carbon dioxide absorption chamber; 22. Gas equalizing tube; 3. Gas diversion chamber; 31. Polymer hygroscopic 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 bayonet; 44. Positioning slot; 45. Oval socket; 5. Anesthetic gas absorption chamber; 6. Moisture heat exchange chamber; 7. Gas outlet channel; 8. Gas inlet channel. 9. Ventilation switch mechanism; 91. Positioning slider; 92. Press knob; 93. Sliding guide port; 94. Annular air seal ring; 95. Air seal ring; 10. Gas sampling connector; 101. Handle; 102. Sealing cover; 103. Polymer breathable material; 104. Locking piece; 105. RFID electronic tag; 106. Metal hanging ring. DETAILED DESCRIPTION

[0040] The present invention will be further described below.

[0041] Example: An external multifunctional anesthetic gas carbon dioxide absorber, see Figure 1 and Figure 2, including an absorber 1, which is square and can store more carbon dioxide absorbent than the existing cylindrical absorber 1. The absorber 1 is composed of an upper box body 13 and a lower box body 14. A movable horizontal partition 11 is provided between the upper box body 13 and the lower box body 14. The movable horizontal partition 11 divides the absorber 1 into an upper gas absorption chamber and a lower gas diversion chamber 3. A vertical partition 12 is provided in the gas absorption chamber. The 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 mechanism 9 for switching the anesthetic gas absorption chamber 5 is provided on the left side of the gas diversion chamber 3. The tops of the first carbon dioxide absorption chamber 2, the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 are provided with movable Filter plate, the movable filter partition is snapped into the gas diversion chamber 3, and a heat and moisture exchange chamber 6 is provided above the movable filter partitions of the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5. An outlet channel 7 and an air inlet channel 8 are respectively provided on the left and right sides of the upper part of the absorber 1. The air inlet channel 8 is connected with the upper part of the first carbon dioxide absorption chamber 2 through the movable filter partition, and the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 are connected with the outlet channel 7 through the heat and moisture exchange chamber 6. The heat and moisture exchange chamber 6 is filled with a heat and moisture exchange filter. 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 and moisture exchange chamber 6. The RFID electronic tag 105 records relevant information about the specifications and models of the absorber 1 and the filling of carbon dioxide absorbent. The provision of the RFID electronic tag 105 and the gas sampling connector 10 is an indispensable condition for facilitating intelligent monitoring and management.

[0042] The gas sampling connector 10 provided on the top of the absorber 1 is a standard Luer connector, which serves as a connection portion for an external sampling tube for gas sampling.

[0043] The carbon dioxide absorption channel of the present invention is composed of a first carbon dioxide absorption chamber 2, a second carbon dioxide absorption chamber 4, and a gas diversion chamber 3 to form a U-shaped gas channel for absorbing 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 incomplete carbon dioxide. The two absorption zones ensure efficient secondary absorption of carbon dioxide. The carbon dioxide absorption airway adopts a U-shaped segmented secondary absorption method. The anesthesiologist can more accurately judge the effectiveness of the carbon dioxide absorbent by the color change of the carbon dioxide absorbent in the second carbon dioxide absorption chamber 4. Since the first carbon dioxide absorption chamber 2 absorbs carbon dioxide first and changes color, the color does not change after full absorption. The second carbon dioxide absorption chamber 4 then absorbs carbon dioxide and changes color. The U-shaped channel design makes it easier for the anesthesiologist to use the color change of the carbon dioxide absorbent in the first carbon dioxide absorption chamber 2 as a reference and compare it with the color of the carbon dioxide absorbent in the second carbon dioxide absorption chamber 4 to understand the carbon dioxide absorption status of the second carbon dioxide absorption chamber 4. There is no need to use a color card for comparison, which makes identification simpler and more convenient. Moreover, in the early stage of surgery, as long as the carbon dioxide absorbent in the second carbon dioxide absorption chamber 4 does not change color, the doctor does not need to worry about excessive carbon dioxide, so that the doctor can perform the surgery with peace of mind. At the same time, due to the addition of the second carbon dioxide absorption chamber 4, the absorber 1 can store more carbon dioxide absorbent, greatly increasing the carbon dioxide adsorption processing capacity, which can meet the needs of longer-lasting operations and reduce the risk of frequent replacement of the absorber 1 during the operation.

[0044] In the middle of the U-shaped carbon dioxide absorption airway is a gas diversion chamber 3 provided with a gas guide plate, which is a low-gas resistance heat dissipation and cooling channel 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 carbon dioxide absorption chamber 2 and the second carbon dioxide absorption chamber 4. Moreover, the interior of the gas diversion chamber 3 is hollow, does not contain carbon dioxide absorbent, and will not generate heat without chemical reaction, providing a natural cooling space for the gas circulation process, so that the heat generated by the chemical reaction in the first carbon dioxide absorption chamber 2 can be released and cooled. The present invention lays a high molecular hygroscopic material 31 at the bottom of the gas diversion chamber 3, which can absorb the moisture of 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 of carbon dioxide and the 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.

[0045] The upper parts of the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 of the present invention are separated by a heat and moisture exchange chamber 6, see Figure 1The upper parts of the second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 are connected to the heat and moisture exchange chamber 6, and the heat and moisture exchange chamber 6 is connected to the air outlet channel 7. The heat and moisture exchange chamber 6 is integrated in the absorber 1, and the heat and moisture exchange chamber 6 is filled with a heat and moisture exchange filter. The heat and moisture exchange filter is an artificial nose bacteria filter. When the gas sent in by the anesthesia machine is absorbed by the carbon dioxide absorbent and activated carbon, it enters the air outlet channel 7 through a specially provided artificial nose bacteria filter, which not only ensures the temperature and humidity of the patient's inhaled gas, but also isolates the bacteria and viruses in the inhaled gas, avoids cross infection, improves the safety of use, makes the patient's inhaled gas more comfortable, and reduces the risk of air leakage and the additional cost caused by the external artificial nose filter.

[0046] The present invention forms a dual-airway working mode with the carbon dioxide absorption chamber through the design of the anesthetic gas absorption chamber 5, which can absorb not only carbon dioxide but also anesthetic gas.

[0047] 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. In order to facilitate the anesthetic gas to enter the anesthetic gas absorption chamber 5 better, the size of the activated carbon and carbon dioxide absorbent particles is selected to make the permeability in the anesthetic gas absorption chamber 5 much greater than the permeability in the second carbon dioxide absorption chamber 4. When the ventilation switch mechanism 9 opens the bottom vent of the anesthetic gas absorption chamber 5, due to the large activated carbon particles, the permeability in the anesthetic gas absorption chamber 5 is good, the air resistance is small, and the gas is easier to enter the anesthetic gas absorption chamber 5. The anesthetic gas exhaled from the patient's lungs and the anesthetic gas remaining in the pipeline are more quickly adsorbed by the activated carbon particles, reducing or even completely eliminating the anesthetic gas in the closed circulation loop gas, shortening the patient's awakening time, protecting the patient's nerves, and being safer.

[0048] As a preferred solution, there are three product solutions for the design of the separated heat and moisture exchange chamber 6. First, there are two separated heat and moisture exchange chambers 6, such as product 1 and product 2, see Figure 1 and Figure 3 , the carbon dioxide second absorption chamber 4 and the anesthetic gas absorption chamber 5 are discharged from the gas outlet channel 7 after passing through the upper anesthetic gas absorption chamber 5, and secondly, an anesthetic gas absorption chamber 5 is designed, such as product 3, see Figure 5 The second carbon dioxide absorption chamber 4 and the anesthetic gas absorption chamber 5 share a heat and moisture exchange chamber 6. The heat and moisture exchange chamber 6 can be shared by simply opening a vent hole in the upper part of the vertical partition 12 on the side of the anesthetic gas absorption chamber 5 to communicate with the heat and moisture exchange chamber 6. The shape of the heat and moisture exchange chamber 6 can also be optimized according to needs. It can be square, inverted trapezoidal or triangular, see respectively. Figure 1 、 Figure 3 and Figure 5 .

[0049] In order to switch the anesthetic gas absorption chamber 5 during and after surgery to achieve anesthetic gas absorption, a ventilation switch mechanism 9 for opening and closing the vent is provided in the gas diversion chamber 3. Since it is necessary to avoid leakage of anesthetic gas in the absorber 1 and to avoid cross-talk between the dual airway structure of the anesthetic gas absorption chamber 5 and the carbon dioxide absorption chamber, the design of the ventilation switch mechanism 9 is particularly important. The ventilation switch mechanism 9 can open the activated carbon airway in time according to the progress of the operation to absorb residual anesthetic gas.

[0050] There are two solutions for the design of the ventilation switch mechanism 9: Ventilation switch mechanism 9 scheme 1, see Figure 5 The ventilation switch mechanism 9 is mainly composed of a pressing knob 92 and a positioning slider 91. The upper and lower ends of the positioning slider 91 are respectively slidably connected to the movable transverse partition 11 and the absorber 1. A plurality of ventilation holes are correspondingly opened on the top surface of the positioning slider 91 and the movable transverse partition 11 below the anesthetic gas absorption chamber 5. When performing surgery, see Figure 8 and Figure 9 , the pressing knob 92 is in the initial position. At this time, the vent on the positioning slider 91 and the vent on the movable transverse partition 11 are in a misaligned state, and the anesthetic gas absorption chamber 5 cannot take in air. After the operation is completed and suturing is performed, it is only necessary to press the pressing knob 92 inward, and the positioning slider 91 slides to the specified position. The vent on the positioning slider 91 is aligned with the vent on the movable transverse partition 11. The vent is in an open state, and the pipeline gas containing anesthetic gas can smoothly enter the anesthetic gas absorption chamber 5, and the activated carbon adsorbs and removes the anesthetic gas. In order 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.

[0051] Regarding the airtightness design of the ventilation switch mechanism 9: In order to ensure that anesthetic gas does not enter the anesthetic gas absorption chamber 5 when the vent is not opened, an annular airtight ring 94 is provided around the vent 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.

[0052] Ventilation switch mechanism 9 scheme 2, see Figure 1 and Figure 3, a third carbon dioxide absorption chamber 34 is added to the gas diversion chamber 3 below the absorber 1, and a lower partition 32 is also vertically provided in the gas diversion chamber 3, and the lower partition 32 divides the left side of the gas diversion chamber 3 into the third carbon dioxide absorption chamber 34, and the third carbon dioxide absorption chamber 34 is located directly below the anesthetic gas absorption chamber 5, and a vent is provided 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 is mainly composed of a pressing knob 92 and a positioning slider 91, and the upper and lower ends of the positioning slider 91 are respectively slidably connected to the lower partition 32, and a plurality of vents are correspondingly provided on the positioning slider 91 and the lower partition 32. During surgery, the pressing knob 92 is in the initial position, and the vent on the positioning slider 91 and the vent on the lower partition 32 are in a misaligned state, so that the anesthetic gas absorption chamber 5 and the third carbon dioxide absorption chamber 34 cannot take in air. When the surgery is complete and suturing is performed, simply press the push knob 92 inward, and the positioning slider 91 slides to the designated position. At this point, the vent on the positioning slider 91 aligns 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 remaining carbon dioxide, and then enters the anesthetic gas absorption chamber 5, where the activated carbon particles adsorb and remove the anesthetic gas. A sliding limit bar is provided on the side of the positioning slider 91, and a dovetail groove is provided on the side of the lower partition 32 to match the sliding limit bar, achieving a sliding connection between the positioning slider 91 and the lower partition 32.

[0053] Regarding the airtightness design of the ventilation switch mechanism 9: in order to ensure that anesthetic gas does not enter the anesthetic gas absorption chamber 5 and the carbon dioxide third absorption chamber 34 when the vent is not opened, an annular airtight ring 94 is provided around the vent 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 through the annular airtight ring 94.

[0054] Since the pressing knob 92 needs to be pressed and slid, see Figure 8 and Figure 9 In order to prevent anesthetic gas from leaking outward from the installation location of the pressing knob 92, a sliding guide port 93 matching the pressing knob 92 is provided at the lower part of the absorber 1, and 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 located between the sliding guide port 93 and the pressing knob 92 for airtight sealing before and after the pressing knob 92 moves, thereby ensuring that anesthetic gas does not leak.

[0055] In order to avoid mis-activation of the push knob 92, which may cause mis-operation of the ventilation switch mechanism 9, a locking piece 104 is provided on the outer wall of the absorber 1 to prevent mis-operation of the push knob 92. Figure 2 、 Figure 4 and Figure 6 The middle part of the locking piece 104 is slidably connected to the outer shell of the absorber 1, and a pull handle is provided at the right end of the locking piece 104, and a limit slot matching the pressing knob 92 is opened at the left end of the locking piece 104. The locking piece 104 is limited by the limit slot and the front end of the pressing knob 92 is clamped and limited by the locking piece 104 to keep the front end of the pressing knob 92 in its initial state. When the operation is completed and sutured, it is only necessary to pull the locking piece 104 to the right to disengage the pressing knob 92 and press the pressing knob 92 inward. The gas channel of the anesthetic gas absorption chamber 5 is opened to adsorb the residual anesthetic gas in the circuit.

[0056] The sliding connection method between the locking plate 104 and the absorber 1 is as follows: a sliding groove is horizontally 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 through the limiting screw, and is horizontally slidably connected along the surface of the absorber 1 through the limiting screw.

[0057] As a medical auxiliary device, the absorber 1 has a very high requirement for air tightness during the delivery of anesthesia gas in surgery. In order to realize the installation design of the internal structure of the absorber 1, the absorber 1 is composed of an upper box body 13 and a lower box body 14. Figure 5 and Figure 7 The upper and lower housings 13 and 14 are fixed to each other by ultrasonic welding or adhesive bonding, forming a primary seal. The upper end of the lower housing 14 is provided with an annular airtight ridge 15, which rests against the inner surface of the upper housing 13, forming a secondary seal. These two seals create an L-shaped double sealing surface between the upper and lower housings 13 and 14, ensuring the airtightness of the absorber. The upper end of the lower housing 14 is also provided with a mounting groove 16 for facilitating the installation of the movable transverse baffle 11. The movable transverse baffle 11 snaps into the mounting groove 16. The design of the mounting groove 16 physically separates the upper and lower housings 13 and 14, ensuring the orderly flow of gas.

[0058] 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 paved with a polymer breathable material 103. The polymer breathable material 103 acts as a breathable filter and prevents the carbon dioxide absorbent and activated carbon dust from entering the gas circulation loop. The bottom of the gas diversion chamber 3 is paved with a polymer hygroscopic material 31 for absorbing moisture at the bottom of the gas diversion chamber 3.

[0059] In order to reduce the kicking of the gas coming out of the bottom of the first carbon dioxide absorption chamber 2 and transmit it with less air resistance, so that the bottom of the second carbon dioxide absorption chamber 4 can be evenly fed with gas, a guide plate 33 is further provided in the gas diversion chamber 3. Figure 1 and Figure 3 The guide plate 33 is vertically arranged along the length direction of the gas diversion chamber 3.

[0060] The present invention vertically provides an air equalization pipe 22 in the first carbon dioxide absorption chamber 2, see Figure 11 The gas equalizing pipe 22 is H-shaped, with an open upper end and a closed lower end. An air outlet (mouth) is provided on the wall of the gas equalizing pipe 22, and the air outlet (mouth) faces 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 equalizing pipe 22, so that the carbon dioxide absorbent in the first carbon dioxide absorption chamber 2 is fully reacted and changes color; for the second carbon dioxide absorption chamber 4, the present invention is vertically provided with an air guide pipe 41 in the second carbon dioxide absorption chamber 4, see Figure 10 The air guide pipe 41 has a flat elliptical cylindrical structure. Since the absorber 1 is square as a whole, the flat elliptical air guide pipe 41 structure is more conducive to the gas being ejected deeply to both sides. A plurality of air outlet holes 42 are opened on the surrounding tube walls of the air guide pipe 41. The number of the air outlet holes 42 decreases from bottom to top, which can reduce the gas outlet volume of the upper part of the air guide pipe 41, so that the carbon dioxide can be fully reacted in the second carbon dioxide absorption chamber 4.

[0061] In order to realize the positioning and installation of the air guide tube 41, a positioning bayonet 43 is provided at the top of the air guide tube 41. 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 socket slot 45 that matches the air guide tube 41. The design of the positioning slot 44 and the elliptical socket slot 45 facilitates the positioning and installation of the air guide tube 41. After installation, the air guide tube 41 can be stably fixed vertically in the second carbon dioxide absorption chamber 4.

[0062] The present invention optimizes the structural design of the product to facilitate the installation and production of components. During installation, the upper box body 13 is first turned over to install the vertical partition 12, and then the filter material is filled. Then the movable transverse partition 11 is installed on the lower box body 14, and then the upper and lower box bodies 14 are installed. Since an installation gap is easily generated between the bottom of the vertical partition 12 and the movable transverse partition 11, which will cause gas to cross-flow between the chambers, the present invention provides a strip-shaped socket groove 17 on the movable transverse partition 11 that matches the vertical partition 12, see Figure 12The lower ends of the vertical partitions 12 are inserted into the strip socket grooves 17. The design of the strip socket grooves 17 plays a role in positioning and installing the vertical partitions 12, and at the same time has the function of filling the installation gap and preventing gas from flowing between the chambers.

[0063] To prevent dust from entering the absorber 1 through the air inlet channel 8 and the air outlet channel 7 and causing secondary pollution, a rubber or polymer sealing cover 102 is provided on the ports of the air inlet channel 8 and the air outlet channel 7. The sealing cover is detachably connected to the absorber 1, thereby achieving a sealed design for the air inlet channel 8 and the air outlet channel 7, ensuring the long-term effectiveness of the carbon dioxide absorbent storage. At the same time, to prevent the artificial nose heat and moisture exchange filter from falling out of the air outlet channel 7, a baffle is provided in the air outlet channel 7 to prevent the artificial nose heat and moisture exchange filter from falling out. The baffle is provided with a vent hole for facilitating gas circulation. The vertical partition 12 between the heat and moisture exchange chamber 6 and the second carbon dioxide absorption chamber 4 is also provided with a vent hole for facilitating gas circulation, facilitating gas outlet.

[0064] The front and rear sides of the upper portion of the absorber 1 are recessed inward to form a convenient grip 101. The grip 101 facilitates the doctor's grasping and installation and removal of the absorber 1. The air inlet channel 8 and the air outlet channel 7 are both disposed within the grip 101. The air inlet channel 8 and the air outlet channel 7 are optimized within the grip 101. The semi-arc shape of the air inlet and outlet channels 7 is designed to form the absorber's handgrip, fully utilizing the internal space of the handle without increasing the overall size of the product due to the handle design. The absorber 1 is aesthetically pleasing, comfortable, and ergonomically designed. The entire absorber 1 is made of a highly transparent polymer material, making it easier to observe the color change of the carbon dioxide indicator.

[0065] The handle 101 on the upper part of the absorber 1 is provided with two non-penetrating small holes, and a rotating metal ring 106 is installed on the small holes. The setting of the metal ring 106 facilitates the external mounting of the absorber 1 on the anesthesia body and reduces the load-bearing pressure of the gas circuit pipeline.

[0066] In the prior art, anesthesiologists usually judge the effectiveness of the carbon dioxide absorbent by the color change of the carbon dioxide absorbent and decide whether the absorber 1 needs to be replaced. A gas sampling connector 10 is provided on the top of the absorber 1 of the present invention. The gas sampling connector 10 is connected to the inside of the heat and moisture exchange chamber 6. By connecting a professional detection instrument to the gas sampling connector 10, the gas in the absorber 1 is sampled and tested, so that it can be accurately judged whether the gas discharged by the absorber 1 meets the standard. When the detected gas is unqualified, the absorber 1 can be replaced in time. Before the absorber 1 is not used, the gas sampling connector 10 is sealed with a cap to ensure that the absorber 1 is clean. When in use, the cap is pulled out and the air inlet sampling interface of the detection instrument is plugged into the gas sampling connector 10, which is very convenient. After the absorber 1 is used, the detection instrument is removed and the absorber 1 can be recycled. The design cost of the gas sampling connector 10 is low and the function is large, which is conducive to the promotion of digital medicine.

[0067] The above is a detailed introduction to an external multifunctional anesthetic gas carbon dioxide absorber provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. Changes and improvements to the present invention will be possible without exceeding the concept and scope specified in the appended claims. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An external multifunctional anesthetic gas carbon dioxide absorber, characterized by: The invention relates to an absorber, wherein the absorber is composed of an upper box body and a lower box body, and a movable horizontal partition is provided between the upper box body and the lower box body, and the movable horizontal partition divides the absorber into an upper gas absorption chamber and a lower gas diversion chamber, and a vertical partition is provided in the gas absorption chamber, and the vertical partition divides the gas absorption chamber from right to left into a first carbon dioxide absorption chamber, a second carbon dioxide absorption chamber and an anesthetic gas absorption chamber, and a vent hole is provided on the movable horizontal partition provided below the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber, and a vent switch mechanism for switching the anesthetic gas absorption chamber on the left side of the gas diversion chamber is provided, and the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are provided. A movable filter baffle is provided on the top of the carbon second absorption chamber and the anesthetic gas absorption chamber, and the movable filter baffle is clamped in the gas diversion chamber. A heat and moisture exchange chamber is provided above the movable filter baffle of the carbon dioxide second absorption chamber and the anesthetic gas absorption chamber. An air outlet channel and an air inlet channel are respectively provided on the left and right sides of the upper part of the absorber. The air inlet channel is connected with the upper part of the carbon dioxide first absorption chamber through the movable filter baffle. The carbon dioxide second absorption chamber and the anesthetic gas absorption chamber are connected with the air outlet channel through the heat and moisture exchange chamber. The heat and moisture exchange chamber is filled with a heat and moisture exchange filter. An RFID electronic tag and a gas sampling connector are provided on the top of the absorber, and the gas sampling connector is connected with the internal space of the heat and moisture exchange chamber.

2. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The end faces of the upper box body and the lower box body are fixed by welding or bonding. The upper end of the lower box body is provided with an annular airtight ridge, and the airtight ridge is tightly attached to the inner side of the upper box body, so that an L-shaped double sealing surface is formed between the upper box body and the lower box body. The upper end of the lower box body is also provided with an installation groove for facilitating the installation of a movable transverse partition, and the movable transverse partition is snapped into the installation groove.

3. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the third carbon dioxide absorption chamber are filled with carbon dioxide absorbent, and the anesthetic gas absorption chamber is filled with activated carbon particles.

4. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The tops and bottoms of the first carbon dioxide absorption chamber, the second carbon dioxide absorption chamber and the anesthetic gas absorption chamber are all paved with polymer breathable materials, and the bottom of the gas diversion chamber is paved with polymer moisture-absorbing materials.

5. The external multifunctional 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 for the operator to grasp conveniently. The air inlet channel and the air outlet channel are arranged inside or outside the handle. The handle on the upper part of the absorber is provided with two non-penetrating small holes, and a rotating metal ring is installed on the small holes.

6. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: Two or more guide plates are arranged on the right side of the gas diversion chamber perpendicular to the bottom surface of the lower box body.

7. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: An air equalizing pipe is vertically provided in the first carbon dioxide absorption chamber. The air equalizing pipe is H-shaped, with an open upper end and a closed lower end. Air outlet holes are provided on the wall of the air equalizing pipe, and the air outlet holes face the left and right sides of the first carbon dioxide absorption chamber. An air guide pipe is vertically provided in the second carbon dioxide absorption chamber. The air guide pipe is a flat oval structure. A plurality of air outlet holes are provided on the wall of the air guide pipe, and the number of the air outlet holes decreases from bottom to top.

8. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: The ventilation switch mechanism is mainly composed of a pressing knob and a positioning slider. The upper and lower ends of the positioning slider are respectively slidably connected to the movable transverse partition and the absorber. A plurality of vents are correspondingly provided on the top surface of the positioning slider and the movable transverse partition below the anesthetic gas absorption chamber. The vents on the movable transverse partition are surrounded by an annular air-sealing ring, and the annular air-sealing ring is located between the positioning slider and the movable transverse partition. The lower part of the absorber is provided with a sliding guide port matching the pressing knob, and an air-sealing ring is provided between the sliding guide port and the pressing knob. The rear end of the pressing knob is fixedly connected to the front end of the positioning slider. The outer wall of the absorber is also provided with a locking plate to prevent the pressing knob from being operated accidentally.

9. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: A lower partition is provided on the left side of the gas diversion chamber perpendicular to the bottom surface, and the lower partition divides the left side space of the gas diversion chamber into a third carbon dioxide absorption chamber, and the third carbon dioxide absorption chamber is located directly below the anesthetic gas absorption chamber, and a vent is provided on the movable transverse partition between the third carbon dioxide absorption chamber and the anesthetic gas absorption chamber, and the ventilation switch mechanism is mainly composed of a pressing knob and a positioning slider, and the upper and lower ends of the positioning slider are respectively slidably connected to the lower partition, and a plurality of vents are correspondingly provided on the positioning slider and the lower partition, and an annular air sealing ring is provided around the vent of the lower partition, and the annular air sealing ring is located between the positioning slider and the lower partition, and a sliding guide port matching the pressing knob is provided at the lower part of the absorber, and an air sealing ring is provided between the sliding guide port and the pressing knob, and the rear end of the pressing knob is fixedly connected to the front end of the positioning slider, and a locking plate is also provided on the outer wall of the absorber to prevent the pressing knob from being operated incorrectly.

10. The external multifunctional anesthetic gas carbon dioxide absorber according to claim 1, characterized in that: Sealing covers made of rubber or polymer material are provided on the ports of the air inlet channel and the air outlet channel, and the sealing covers are detachably connected to the absorber.

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