A device for monitoring end-tidal carbon dioxide during endoscopic examination

Abstract

This invention relates to the field of end-tidal carbon dioxide monitoring technology, and discloses a device for end-tidal carbon dioxide monitoring during endoscopic examination, comprising: an endoscope, a monitoring unit, and a sputum removal unit. The endoscope includes a base cover, an oropharyngeal tube, a flexible arc-shaped larynx, and an airway inlet tube. The monitoring unit includes a four-way tube and a one-way breathing head. The sputum removal unit includes a mounting frame and a coarse filter tube, a heating tube, a condenser tube, and a fine filter tube mounted on the mounting frame, as well as a temperature control component for adjusting the temperature of the coarse filter tube, the heating tube, the condenser tube, and the fine filter tube, and a drive component for driving the water circulation constructed by the coarse filter tube, the heating tube, the condenser tube, the fine filter tube, and the temperature control component. This invention can deliver a continuous high-flow oxygen supply directly to the patient's larynx from the outside. The combination of these two methods can effectively reduce the risk of hypoxemia during endoscopic examination, and can ensure that the air entering the external monitoring device is clean, avoiding the influence of water vapor and secretions on the monitoring results and preventing secretions from clogging the sampling tube.

Description

Technical Field

[0001] This invention relates to the field of end-tidal carbon dioxide monitoring technology, and more particularly to a device for end-tidal carbon dioxide monitoring during endoscopic examination. Background Technology

[0002] Endoscopic procedures (such as gastroscopy, colonoscopy, and bronchoscopy) often require sedation or anesthetic drugs, significantly increasing the risk of respiratory depression. When SpO2 (oxygen saturation) drops, the patient may have already been in a state of hypoxia for more than one minute. International guidelines (such as the American Society of Anesthesiologists (ASA) and the European Society of Anesthesiology (ESA)) have listed EtCO2 (end-tidal carbon dioxide) monitoring as Level A evidence for painless endoscopy, requiring routine use under moderate to severe sedation. my country's "Guidelines for Sedation / Anesthesia in Digestive Endoscopy" also recommends that "EtCO2 (end-tidal carbon dioxide) monitoring should be used when conditions permit."

[0003] Currently, common complications of clinical endoscopic examinations include hypoxemia, regurgitation aspiration, upper airway obstruction, and respiratory depression. Common solutions include dedicated laryngeal masks, nasal masks, nasopharyngeal airways, and oropharyngeal airways. Dedicated laryngeal masks are expensive, and while other products address ventilation, they cannot simultaneously address end-tidal carbon dioxide monitoring or effectively prevent airway obstruction caused by posterior tongue displacement. Furthermore, common end-tidal carbon dioxide monitoring devices are susceptible to dilution or contamination of exhaled CO2 concentration when respiratory humidity is high, leading to deviations from the true value. For example, traditional bypass devices are easily affected by ambient air mixing due to the long-distance gas transmission of the sampling tube, while mainstream sensors are directly exposed to the respiratory airflow, and water vapor condensation may block the light path. In addition, secretions from the throat and nasal cavity can easily enter the sampling tube during exhalation, potentially causing blockage. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for monitoring end-tidal carbon dioxide during endoscopic examination.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for monitoring end-tidal carbon dioxide during endoscopic examination includes: an endoscope, a monitoring unit, and a sputum removal unit;

[0007] The endoscope includes: a base mask, an oropharyngeal tube, a flexible arc-shaped larynx, and an airway inlet tube;

[0008] The monitoring unit includes: a four-way tube and a one-way breathing head;

[0009] The sputum removal unit includes: a mounting frame and a coarse filter tube, a heating tube, a condenser tube, and a fine filter tube mounted on the mounting frame, as well as a temperature control assembly for adjusting the temperature of the coarse filter tube, the heating tube, the condenser tube, and the fine filter tube, and a drive assembly for driving the water circulation formed by the coarse filter tube, the heating tube, the condenser tube, the fine filter tube, and the temperature control assembly.

[0010] As a further embodiment of the present invention, a connecting clip is provided at the top of the base cover for holding the four-way tube. The oropharyngeal tube is provided on one side of the base cover. One end of the flexible arc-shaped larynx is fixedly connected to one end of the oropharyngeal tube. The other end of the flexible arc-shaped larynx is bent. The airway inlet tube is provided on the other side of the base cover. The airway inlet tube passes through the base cover, the oropharyngeal tube and the bent end of the flexible arc-shaped larynx in sequence and is connected to the outside.

[0011] As a further embodiment of the present invention, the four-way tube includes two nasal tubes and two exhalation tubes, both of which are engaged with a one-way breathing head.

[0012] As a further embodiment of the present invention, the coarse filter tube is inclined, and separation baffles are interlaced inside the coarse filter tube. The air inlet at the top of the coarse filter tube is connected to the one-way breathing head, and a waste pipe is opened at the bottom of the coarse filter tube.

[0013] As a further embodiment of the present invention, the heating tube includes an outer heating tube and an inner heating tube. The inner heating tube is disposed inside the outer heating tube and has a serpentine shape from bottom to top. The air inlet and air outlet of the inner heating tube are inserted into the outer heating tube, and the air inlet of the inner heating tube is connected to the air outlet of the coarse filter tube.

[0014] As a further embodiment of the present invention, the condenser tube includes an outer condenser tube and an inner condenser tube. The inner condenser tube is disposed inside the outer condenser tube and has a serpentine shape from top to bottom. The air inlet and outlet of the inner condenser tube are inserted into the outer condenser tube. The air inlet of the inner condenser tube is connected to the air outlet of the heating inner tube. A condensate water pipe is provided at the bottom end of the inner condenser tube and extends to the outside through the outer condenser tube.

[0015] As a further embodiment of the present invention, the air inlet of the fine filter tube is connected to the air outlet of the condenser inner tube, a filter screen column is provided inside the fine filter tube, a detection tube is rotatably connected to the bottom end of the filter screen column, one end of the detection tube is inserted through the fine filter tube and extends to the outside, and its end is connected to an external monitoring device.

[0016] As a further embodiment of the present invention, the temperature control assembly includes a semiconductor refrigeration chip, a thermally conductive box, a coldly conductive box, a hot cover, a cold cover, two sets of thermally conductive pipes, and two sets of coldly conductive pipes. The thermally conductive box and the coldly conductive box are fixedly connected to the hot and cold sides of the semiconductor refrigeration chip, respectively. The interior of both the thermally conductive box and the coldly conductive box is provided with a heat dissipation vent that is in contact with the semiconductor refrigeration chip. The hot cover is sleeved on the outside of the coarse filter tube, and the cold cover is sleeved on the outside of the fine filter tube. The thermally conductive box, the heating outer tube, and the hot cover are connected through two sets of thermally conductive pipes, and the coldly conductive box, the condensing outer tube, and the cold cover are connected through two sets of coldly conductive pipes.

[0017] As a further embodiment of the present invention, the driving assembly includes three passive electromagnetic stirring assemblies, three active electromagnetic stirring assemblies, and a drive motor. The passive electromagnetic stirring assembly consists of an outer passive box and an inner passive stirring turbine. Two of the passive electromagnetic stirring assemblies are provided with circulation pipes at both ends, and the two passive electromagnetic stirring assemblies are connected to the heating outer pipe and the condensing outer pipe respectively through the circulation pipes. The passive stirring turbine in the other passive electromagnetic stirring assembly is inserted through the passive box and the fine filter pipe and fixedly connected to the filter screen column. The active electromagnetic stirring assembly consists of an outer active box and an inner active stirring turbine. The magnetic directions of the three active stirring turbines are corresponding. The drive motor is mounted on one of the active boxes, and its output end is inserted through the corresponding active box and fixedly connected to the active stirring turbine.

[0018] As a further embodiment of the present invention, the base of the mounting bracket is provided with a waste trough, which is connected to a waste pipe and a condensate pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this application, the design of the flexible arc-shaped larynx allows the patient to bite down on the oropharyngeal tube during endoscopy, with the bend of the flexible arc-shaped larynx extending into the patient's larynx and pressing down on the patient's tongue. This effectively prevents airway obstruction caused by the tongue falling back. Furthermore, the airway inlet tube is connected from the outside to the bend of the flexible arc-shaped larynx, allowing for a continuous high-flow supply of nutrients directly to the patient's larynx from the outside. The combination of these two features can effectively reduce the risk of hypoxemia during endoscopy.

[0021] The expectoration unit in this application heats the coarse filter tube and heating tube to ensure the water vapor content in the secretions, and cools the condenser tube and fine filter tube to condense the water vapor in the air and secretions. The combination of these two features utilizes the temperature difference to allow the water vapor in the air to condense quickly and filter the secretions through the coarse and fine filter tubes, ensuring that the air entering the external monitoring device is clean and preventing water vapor and secretions from affecting the monitoring results and from clogging the sampling tube. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of a device for monitoring end-tidal carbon dioxide during endoscopic examination, as proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the endoscope section of an endoscopic end-tidal carbon dioxide monitoring device proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the airway inlet tube of an end-tidal carbon dioxide monitoring device for endoscopic examination proposed in this invention.

[0025] Figure 4 This is a schematic diagram of the monitoring section of an end-tidal carbon dioxide monitoring device proposed in this invention;

[0026] Figure 5 This is a schematic cross-sectional view of the coarse filter tube of an end-tidal carbon dioxide monitoring device proposed in this invention.

[0027] Figure 6 This is a schematic cross-sectional view of the heating tube and condenser tube of an end-tidal carbon dioxide monitoring device for endoscopic examination proposed in this invention.

[0028] Figure 7 This is a schematic diagram of a fine filter tube for an end-tidal carbon dioxide monitoring device under endoscopic examination, as proposed in this invention.

[0029] Figure 8 This is a schematic diagram of the temperature control component and drive component of an end-tidal carbon dioxide monitoring device for endoscopic examination proposed in this invention.

[0030] In the diagram: 1. Endoscope; 101. Base cover; 102. Oropharyngeal tube; 103. Flexible arc-shaped larynx; 104. Airway inlet tube; 105. Connecting clip; 2. Monitoring unit; 201. Four-way tube; 202. One-way breathing head; 203. Nasal tube; 204. Expiratory tube; 3. Expectorant unit; 4. Mounting frame; 401. Waste hopper; 5. Coarse filter tube; 501. Separation baffle; 502. Waste tube; 6. Heating tube; 601. Outer heating tube; 602. Inner heating tube; 7. Condenser tube; 701. 702. Condenser outer tube; 703. Condenser inner tube; 704. Condenser water tube; 8. Fine filter tube; 805. Filter screen column; 806. Detection tube; 9. Temperature control assembly; 907. Semiconductor refrigeration chip; 908. Thermal conduction box; 909. Cold conduction box; 900. Thermal cover cylinder; 901. Cold cover cylinder; 902. Thermal conduction pipe; 903. Cold conduction pipe; 10. Drive assembly; 1001. Passive electromagnetic stirring assembly; 1002. Active electromagnetic stirring assembly; 1003. Drive motor; 1004. Circulation pipe. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figure 1 As shown, a device for monitoring end-tidal carbon dioxide during endoscopic examination includes: an endoscope 1, a monitoring unit 2, and a sputum removal unit 3;

[0033] like Figure 2 and Figure 3 As shown, the endoscope 1 includes: a base cover 101, an oropharyngeal tube 102, a soft arc-shaped larynx 103, and an airway inlet tube 104;

[0034] like Figure 1 and Figure 2 As shown, the monitoring unit 2 includes: a four-way tube 201 and a one-way breathing head 202;

[0035] like Figure 1 and Figure 4 As shown, the sputum removal unit 3 includes: a mounting frame 4 and a coarse filter tube 5, a heating tube 6, a condenser tube 7 and a fine filter tube 8 disposed on the mounting frame 4, a temperature control component 9 for adjusting the temperature of the coarse filter tube 5, the heating tube 6, the condenser tube 7 and the fine filter tube 8, and a drive component 10 for driving the water circulation formed by the coarse filter tube 5, the heating tube 6, the condenser tube 7, the fine filter tube 8 and the temperature control component 9.

[0036] like Figure 2 and Figure 3 As shown, a connecting clip 105 is provided at the top of the base cover 101 for holding the four-way tube 201. The oropharyngeal tube 102 is provided on one side of the base cover 101. One end of the flexible arc-shaped larynx 103 is fixedly connected to one end of the oropharyngeal tube 102. The other end of the flexible arc-shaped larynx 103 is bent. The airway inlet tube 104 is provided on the other side of the base cover 101. The airway inlet tube 104 passes through the base cover 101, the oropharyngeal tube 102 and the bent end of the flexible arc-shaped larynx 103 in sequence and is connected to the outside.

[0037] In this application, the design of the flexible arc-shaped larynx 103 allows the patient to bite down on the oropharyngeal tube 102 during endoscopic examination, with the bend of the flexible arc-shaped larynx 103 extending into the patient's larynx and pressing down on the patient's tongue. This effectively prevents airway obstruction caused by the tongue falling back. Furthermore, the airway inlet tube 104 connects to the bend of the flexible arc-shaped larynx 103 from the outside, allowing for continuous high-flow oxygen delivery directly to the patient's larynx from the outside. The combination of these two features can effectively reduce the risk of hypoxemia during endoscopic examination.

[0038] like Figures 1 to 3 As shown, the four-way tube 201 includes two nasal tubes 203 and two exhalation tubes 204, both of which are engaged with the one-way breathing head 202.

[0039] This application uses a connecting clip 105 to hold the four-way tube 201, thereby restricting the four-way tube 201 so that the four-way tube 201 can be inserted into the patient's nasal cavity through the nasal tube 203 to perform end-tidal monitoring sampling.

[0040] like Figure 1 and Figure 5 As shown, the coarse filter tube 5 is inclined, and the interior of the coarse filter tube 5 is provided with staggered separation baffles 501. The air inlet at the top of the coarse filter tube 5 is connected to the one-way breathing head 202, and the bottom of the coarse filter tube 5 is provided with a waste pipe 502.

[0041] When this application is used, the end-expiratory air passes through the one-way breathing head 202 into the coarse filter tube 5. Due to the obstruction of the separation baffle 501, the end-expiratory air repeatedly folds back and forth in the coarse filter tube 5, causing large particles of secretions in the end-expiratory air to settle due to impact with the coarse filter tube 5, and finally fall into the waste pipe 502 along the wall of the coarse filter tube 5 and the separation baffle 501.

[0042] like Figure 4 and Figure 6 As shown, the heating tube 6 includes an outer heating tube 601 and an inner heating tube 602. The inner heating tube 602 is disposed inside the outer heating tube 601 and has a serpentine shape from bottom to top. The air inlet and outlet of the inner heating tube 602 are inserted through the outer heating tube 601. The air inlet of the inner heating tube 602 is connected to the air outlet of the coarse filter tube 5.

[0043] When this application is used, the exhaled air enters the heating inner tube 602 from the coarse filter tube 5. The serpentine heating inner tube 602 can extend the movement path of the exhaled air, so that the exhaled air can be fully heated, thereby increasing the water vapor content that the air can hold, that is, ensuring the water vapor content in the fine secretions and preventing the fine secretions from condensing and adhering to the tube wall.

[0044] like Figure 4 and Figure 6 As shown, the condenser tube 7 includes an outer condenser tube 701 and an inner condenser tube 702. The inner condenser tube 702 is located inside the outer condenser tube 701 and has a serpentine shape from top to bottom. The air inlet and outlet of the inner condenser tube 702 are inserted through the outer condenser tube 701. The air inlet of the inner condenser tube 702 is connected to the air outlet of the heating inner tube 602. A condensate water pipe 703 is provided at the bottom end of the inner condenser tube 702. The condensate water pipe 703 is inserted through the outer condenser tube 701 and extends to the outside.

[0045] When this application is used, the exhaled air enters the condenser inner tube 702 from the heating inner tube 602. The serpentine condenser inner tube 702 can extend the movement path of the exhaled air, allowing the exhaled air to be cooled sufficiently. The air entering the condenser inner tube 702 from the heating inner tube 602 generates a large temperature difference, causing secretions and water vapor in the exhaled air to condense quickly, which can effectively remove water vapor from the exhaled air and allow secretions and condensate to be discharged from the condensate pipe 703.

[0046] like Figure 4 and Figure 7 As shown, the air inlet of the fine filter tube 8 is connected to the air outlet of the condenser inner tube 702. The fine filter tube 8 is equipped with a filter screen column 801 inside. The bottom end of the filter screen column 801 is rotatably connected to a detection tube 802. One end of the detection tube 802 is inserted through the fine filter tube 8 and extends to the outside, and its end is connected to an external monitoring device.

[0047] When this application is used, the exhaled air enters the fine filter tube 8 from the condenser inner tube 702, where the relatively dry secretion particles are filtered and intercepted by the filter screen column 801, and the dry air enters the external monitoring device through the detection tube 802 for monitoring.

[0048] like Figure 4 and Figure 8 As shown, the temperature control component 9 includes a semiconductor refrigeration chip 901, a thermally conductive box 902, a coldly conductive box 903, a hot cover 904, a cold cover 905, two sets of thermally conductive pipes 906, and two sets of coldly conductive pipes 907. The thermally conductive box 902 and the coldly conductive box 903 are fixedly connected to the hot and cold surfaces of the semiconductor refrigeration chip 901, respectively. Both the thermally conductive box 902 and the coldly conductive box 903 have heat dissipation vents inside that are in contact with the semiconductor refrigeration chip 901. The hot cover 904 is fitted onto the outside of the coarse filter tube 5, and the cold cover 905 is fitted onto the outside of the fine filter tube 8. The thermally conductive box 902, the heating outer tube 601, and the hot cover 904 are connected through the two sets of thermally conductive pipes 906. The coldly conductive box 903, the condensing outer tube 701, and the cold cover 905 are connected through the two sets of coldly conductive pipes 907.

[0049] When used in this application, the thermal conductivity box 902, the heating outer tube 601, the heating cover 904, and the two sets of thermal conductivity pipes 906 form a heating water circulation pipe 1004. When the water flows through the thermal conductivity box 902, it can carry away the heat generated by the hot surface of the semiconductor cooling chip 901 and transport it to the heating outer tube 601 and the heating cover 904 to heat the heating inner tube 602 and the coarse filter tube 5, ensuring the water vapor content in the secretions and preventing the secretions from condensing. When the water flows through the cold conductivity box 903, it can carry away the cold energy generated by the cold surface of the semiconductor cooling chip 901 and transport it to the condensing outer tube 701 and the cold cover 905 to cool the condensing inner tube 702 and the fine filter tube 8, causing the water vapor in the air and secretions to condense, thereby keeping the air dry and the secretions easy to filter.

[0050] like Figure 4 and Figure 8 As shown, the drive assembly 10 includes three passive electromagnetic stirring assemblies 1001, three active electromagnetic stirring assemblies 1002, and a drive motor 1003. The passive electromagnetic stirring assembly 1001 consists of an outer passive box and an inner passive stirring turbine. Two of the passive electromagnetic stirring assemblies 1001 have circulation pipes 1004 at both ends. The two passive electromagnetic stirring assemblies 1001 are connected to the heating outer pipe 601 and the condensing outer pipe 701 respectively through the circulation pipes 1004. The passive stirring turbine in the other passive electromagnetic stirring assembly 1001 is inserted through the passive box and the fine filter pipe 8 and fixedly connected to the filter screen column 801. The active electromagnetic stirring assembly 1002 consists of an outer active box and an inner active stirring turbine. The magnetic directions of the three active stirring turbines are corresponding. The drive motor 1003 is mounted on one of the active boxes, and its output end is inserted through the corresponding active box and fixedly connected to the active stirring turbine.

[0051] When this application is used, the drive motor 1003 drives the active stirring turbine fan in one of the active electromagnetic stirring components 1002 to rotate. Since the active stirring turbine fan is a magnetic turbine fan and the magnetic directions of the three active stirring turbine fans are corresponding, when one of the active stirring turbine fans rotates, the other two active stirring turbine fans also rotate. Thus, the rotation of the active stirring turbine fan drives the passive stirring turbine fan to rotate. The rotation of the passive stirring turbine fan on the heating tube 6 and the condenser tube 7 causes the water flow in the corresponding water circulation tube 1004 to move, while the rotation of the passive stirring turbine fan on the fine filter tube 8 drives the filter screen column 801 to rotate to filter secretion particles.

[0052] like Figure 1 and Figure 4 As shown, the base of the mounting bracket 4 is provided with a waste trough 401, which is connected to the waste pipe 502 and the condensate pipe 703.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for monitoring end-tidal carbon dioxide during endoscopic examination, characterized in that, include: Endoscopic section (1), monitoring section (2) and expectoration section (3); The endoscope (1) includes: a base cover (101), an oropharyngeal tube (102), a soft arc-shaped larynx (103), and an airway inlet tube (104). The monitoring unit (2) includes: a four-way tube (201) and a one-way breathing head (202); The sputum removal unit (3) includes: a mounting frame (4) and a coarse filter tube (5), a heating tube (6), a condenser tube (7) and a fine filter tube (8) disposed on the mounting frame (4), a temperature control component (9) for adjusting the temperature of the coarse filter tube (5), the heating tube (6), the condenser tube (7) and the fine filter tube (8), and a drive component (10) for driving the water circulation constructed by the coarse filter tube (5), the heating tube (6), the condenser tube (7), the fine filter tube (8) and the temperature control component (9).

2. The device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 1, characterized in that, The top of the base cover (101) is provided with a connecting clip (105) for holding the four-way tube (201). The oropharyngeal tube (102) is located on one side of the base cover (101). One end of the soft arc-shaped larynx (103) is fixedly connected to one end of the oropharyngeal tube (102). The other end of the soft arc-shaped larynx (103) is bent. The airway inlet tube (104) is located on the other side of the base cover (101). The airway inlet tube (104) passes through the base cover (101), the oropharyngeal tube (102) and the bent end of the soft arc-shaped larynx (103) in sequence and is connected to the outside.

3. The device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 1, characterized in that, The four-way tube (201) includes two nasal tubes (203) and two exhalation tubes (204), both of which are engaged with the one-way breathing head (202).

4. The device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 1, characterized in that, The coarse filter tube (5) is inclined and the interior of the coarse filter tube (5) is provided with staggered separation baffles (501). The air inlet at the top of the coarse filter tube (5) is connected to the one-way breathing head (202). The bottom end of the coarse filter tube (5) is provided with a waste pipe (502).

5. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 4, characterized in that, The heating tube (6) includes an outer heating tube (601) and an inner heating tube (602). The inner heating tube (602) is located inside the outer heating tube (601) and has a serpentine shape from bottom to top. The air inlet and outlet of the inner heating tube (602) are inserted through the outer heating tube (601). The air inlet of the inner heating tube (602) is connected to the air outlet of the coarse filter tube (5).

6. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 5, characterized in that, The condenser tube (7) includes an outer condenser tube (701) and an inner condenser tube (702). The inner condenser tube (702) is located inside the outer condenser tube (701) and has a serpentine shape from top to bottom. The air inlet and outlet of the inner condenser tube (702) are inserted through the outer condenser tube (701). The air inlet of the inner condenser tube (702) is connected to the air outlet of the heating inner tube (602). A condensate water pipe (703) is provided at the bottom end of the inner condenser tube (702). The condensate water pipe (703) is inserted through the outer condenser tube (701) and extends to the outside.

7. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 6, characterized in that, The air inlet of the fine filter tube (8) is connected to the air outlet of the condenser inner tube (702). The fine filter tube (8) is provided with a filter screen column (801) inside. The bottom end of the filter screen column (801) is rotatably connected to a detection tube (802). One end of the detection tube (802) is inserted through the fine filter tube (8) and extends to the outside, and its end is connected to an external monitoring device.

8. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 6, characterized in that, The temperature control component (9) includes a semiconductor refrigeration chip (901), a thermally conductive box (902), a coldly conductive box (903), a heat shield (904), a cold shield (905), two sets of thermally conductive pipes (906), and two sets of coldly conductive pipes (907). The thermally conductive box (902) and the coldly conductive box (903) are fixedly connected to the hot and cold surfaces of the semiconductor refrigeration chip (901), respectively. The interior of both the thermally conductive box (902) and the coldly conductive box (903) is equipped with... A heat sink is attached to a semiconductor cooling chip (901). The heat shield (904) is fitted over the outside of the coarse filter tube (5). The cold shield (905) is fitted over the outside of the fine filter tube (8). The heat conduction box (902), the heating outer tube (601), and the heat shield (904) are connected by two sets of heat conduction pipes (906). The cold conduction box (903), the condenser outer tube (701), and the cold shield (905) are connected by two sets of cold conduction pipes (907).

9. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 7, characterized in that, The drive assembly (10) includes three passive electromagnetic stirring assemblies (1001), three active electromagnetic stirring assemblies (1002), and a drive motor (1003). The passive electromagnetic stirring assembly (1001) consists of an external passive box and an internal passive stirring turbine. Both ends of two of the passive electromagnetic stirring assemblies (1001) are provided with circulation pipes (1004). The two passive electromagnetic stirring assemblies (1001) are connected to the heating outer tube (601) and the condensing outer tube (701) respectively through the circulation pipes (1004). The passive stirring turbine in the other passive electromagnetic stirring assembly (1001) is inserted through the passive box and the fine filter tube (8) and fixedly connected to the filter screen column (801). The active electromagnetic stirring assembly (1002) consists of an external active box and an internal active stirring turbine. The magnetic directions of the three active stirring turbines are corresponding. The drive motor (1003) is installed on one of the active boxes, and its output end is inserted through the corresponding active box and fixedly connected to the active stirring turbine.

10. A device for monitoring end-tidal carbon dioxide during endoscopic examination according to claim 6, characterized in that, The base of the mounting bracket (4) is provided with a waste trough (401), which is connected to the waste pipe (502) and the condensate pipe (703).

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