An adjustable pharyngeal airway

Abstract

The present invention relates to the technical field of medical ventilation tubes, in particular to an adjustable pharyngeal ventilation tube, which includes a bite block with a through hole; a gas conduit including a main exhaust passage and an oxygen supply sandwich layer, and a sampling airway is provided in the main exhaust passage, and oxygen flows out from the area between the oxygen supply sandwich layer and the main exhaust passage; an adjustment assembly including an impeller; a cleaning mechanism including a plug, which automatically adjusts the distance between the sampling airway and the oxygen outlet according to the oxygen outlet flow rate. The greater the oxygen flow rate, the greater the distance between the two, so as to avoid inhaling too much oxygen and affecting the detection result. The sealing plate is directly controlled by the impeller speed to move, and the telescopic position of the sampling airway is controlled by the change of the input gas flow rate. At the same time, the reciprocating movement of the plug is used to clear the mucus and water vapor, and the sampling airway is guided by a rolling ring, and the water vapor of the exhaled gas is adsorbed at the same time to prevent the mucus and water vapor from blocking the gas conduit.

Description

Technical Field

[0001] The present invention relates to the technical field of medical ventilation tubes, and in particular to an adjustable pharyngeal ventilation tube. Background Art

[0002] Oropharyngeal ventilation tubes and nasopharyngeal ventilation tubes are both important tools for maintaining airway patency, and are widely used in the fields of first aid, intensive care, and painless gastroscopy. They assist in oxygen supply for patients with unclear consciousness or dyspnea, discharge some exhaled gases, and sample the exhaled gases to detect the end-tidal carbon dioxide concentration, facilitating the understanding of various indicators. However, the existing special-shaped tracheal catheters have problems such as inaccurate positioning, unstable connection, and difficult installation during use.

[0003] The existing Chinese patent with the publication number CN118807057A discloses a special-shaped tracheal catheter, which includes a tracheal assembly, including a bite block, an oxygen supply sandwich layer provided on the inner wall of the bite block, an airbag sleeved on the outer wall of the oxygen supply sandwich layer, and a catheter movably provided on the inner wall of the bite block; and a fixing assembly, including a connecting head, a rotating ring sleeved on the outer wall of the connecting head, and a push column movably arranged on the inner wall of the connecting head; the catheter is fixed inside the patient's airway through the cooperation of the oxygen supply sandwich layer and the airbag, and through the oxygen side holes on the surface of the airbag, oxygen can be supplied evenly and stably, and at the same time, the situation of the airbag over-expanding and squeezing the patient's airway is avoided. When the connecting head is connected to an external device, the movement of the push column can be controlled through the external rotating ring, so that the elastic plate at the bottom of the push column deforms, making the elastic plate close to the inner wall of the device interface, further fixing the connection between the two and improving the airtightness, and preventing the leakage of air at the surface interface connection.

[0004] However, due to the above technical solution, when the oxygen flow rate increases, the sampling airway for sampling exhaled gases is too close to the oxygen outlet, resulting in a large amount of oxygen entering the sampling airway, affecting the detection accuracy of end-tidal carbon dioxide. At the same time, if the sampling airway is set in the direction of the tracheal end, although it is far from the oxygen outlet, it may cause mucus to be sucked in by negative pressure and blocked. Therefore, it is necessary to use different spacings between the sampling end and the oxygen outlet at different oxygen flow rates, and mucus is likely to accumulate at the tracheal end and be sucked into the sampling airway and blocked. When clearing the blockage, it needs to be pulled out and cleaned, which is rather cumbersome and time-consuming. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, the abstract of the specification, and the title of the invention to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.

[0007] To solve the above technical problems, the present invention provides the following technical solution: An adjustable pharyngeal airway tube, comprising a bite block, and a through hole is provided on the bite block;

[0008] A gas conduit, the gas conduit is movably clamped in the through hole, the gas conduit includes a main exhaust passage and an oxygen supply interlayer, and a sampling airway is provided in the main exhaust passage, and oxygen flows out from the area between the oxygen supply interlayer and the main exhaust passage;

[0009] An adjustment assembly, including an impeller rotatably sleeved between the oxygen supply interlayer and the main exhaust passage, and the impeller controls the sampling airway to move away from the oxygen supply interlayer when the oxygen intake flow rate increases;

[0010] A cleaning mechanism, including a plug provided at the end face of the sampling airway, and the plug removes mucus on the inner wall of the main exhaust passage when the sampling airway moves.

[0011] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, wherein: an air inlet pipe and an air outlet pipe are respectively communicated and provided at the end face of the gas conduit, the air inlet pipe is communicated with the oxygen supply interlayer, the main exhaust passage is communicated with the air outlet pipe, the sampling airway is slidably provided in the air outlet pipe, and a plurality of oxygen outlets are arrayed at one end of the oxygen supply interlayer close to the main exhaust passage.

[0012] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, wherein: a first cylinder is fixedly provided in the main exhaust passage, a second cylinder is slidably provided in the first cylinder, a third cylinder is slidably provided in the second cylinder, and the sampling airway penetrates through the third cylinder and moves synchronously with it.

[0013] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, wherein: a first water bag and a second water bag are respectively provided in the main exhaust passage, a first flow channel is provided on the first cylinder, and a second flow channel is provided on the second cylinder.

[0014] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, wherein: a rotating ring is coaxially sleeved outside the impeller, ratchet teeth are provided on the inner wall of the rotating ring, a rotating shaft is provided on the outer wall of the rotating ring, and the impeller starts to drive the rotating ring and the rotating shaft to rotate when the rotation speed exceeds a set threshold.

[0015] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, wherein: one end of the impeller is rotatably provided on the outer wall of the sampling airway, a connecting ring is fixedly provided at the other end, a groove is provided on the end face of the connecting ring, and a ratchet pawl is rotatably provided in the groove;

[0016] A first elastic member is provided between the outer wall of the pawl and the inner wall of the groove. In the initial state, the first elastic member pulls the pawl back into the groove. After the rotational speed of the connecting ring exceeds the set rotational speed threshold, the pawl swings outward and engages with the ratchet teeth.

[0017] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, one end of the rotating shaft is provided with a belt pulley. A communication cavity is provided between the first water sac and the second water sac. A rack is slidably arranged in the communication cavity, and a transmission tooth is meshed on the upper end surface of the rack.

[0018] A circular ring groove is provided on one end surface of the transmission tooth. A synchronous belt is sleeved between the circular ring groove and the outer wall of the belt pulley. A sealing plate is slidably arranged at one end of the rack away from the belt pulley.

[0019] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, sliding columns are simultaneously arranged at both ends of the rack. A single tooth is provided at the other end of the sliding column. A second elastic member is provided between the single tooth and the rack.

[0020] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, a rolling ring is provided at a position of the sampling airway close to the outlet of the main exhaust airway. The rolling ring is driven to roll synchronously when the sampling airway moves.

[0021] A corrugated scraper is provided on the outer wall of the plug. A blocking net is further provided on the end surface of the plug. The plug is rotatably arranged on the inner wall of the main exhaust airway.

[0022] As a preferred embodiment of the adjustable pharyngeal airway tube of the present invention, a spiral groove is further provided on the inner wall of the plug. A sphere is rotatably arranged on the outer wall of the sampling airway. The sphere rolls on the inner wall of the spiral groove.

[0023] The beneficial effects of the present invention are as follows: Automatically adjust the distance between the sampling airway and the oxygen outlet according to the oxygen outlet flow rate. The greater the oxygen flow rate, the greater the distance between the two. When the oxygen flow rate is large and the distance from the oxygen outlet is close, when the negative pressure in the sampling airway sucks the end-expiratory carbon dioxide, excessive oxygen inhalation may affect the detection result. The sealing plate is directly controlled to move by the rotational speed of the impeller, and the telescopic position of the sampling airway is controlled by the change of the input gas flow rate. At the same time, the reciprocating movement of the plug is used to clear the blockage of mucus and water vapor. The rolling ring is used to guide the sampling airway and adsorb the water vapor of the exhaled gas to prevent mucus and water vapor from blocking the gas conduit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. Among them:

[0025] Figure 1 It is a schematic overall view of the adjustable pharyngeal airway tube in the present invention.

[0026] Figure 2 It is a schematic internal structure diagram of the gas conduit in the present invention.

[0027] Figure 3 It is a schematic structure diagram of the adjustment assembly in the present invention.

[0028] Figure 4 It is Figure 3 a schematic structure diagram of the A area of

[0029] Figure 5 It is a schematic internal structure diagram of the communication cavity in the present invention.

[0030] Figure 6 It is Figure 5 a schematic structure diagram of the B area of

[0031] Figure 7 It is a schematic connection diagram of the first water sac and the second water sac in the present invention.

[0032] Figure 8 It is Figure 7 a schematic structure diagram of the C area of

[0033] Figure 9 It is a schematic structure diagram of the rolling ring area in the present invention.

[0034] Reference numerals: 100, bite block; 1001, intake pipe; 1002, outlet pipe; 1003, oxygen outlet; 1004, first cylinder; 1005, second cylinder; 1006, third cylinder; 1007, first water sac; 1008, second water sac; 1009, first flow channel; 101, through hole; 1011, second flow channel;

[0035] 200, gas conduit; 201, main exhaust channel; 202, oxygen supply sandwich layer; 203, sampling air channel; 2001, rolling ring; 2002, corrugated scraper; 2003, blocking net; 2004, spiral groove; 2005, sphere;

[0036] 300. Impeller; 3001. Rotating ring; 3002. Ratchet teeth; 3003. Rotating shaft; 3004. Connecting ring; 3005. Groove; 3006. Pawl; 3007. First elastic member; 3008. Belt pulley; 3009. Communication cavity; 3011. Rack; 3012. Transmission gear; 3013. Circular groove; 3014. Timing belt; 3015. Sealing plate; 3016. Slide post; 3017. Single tooth; 3018. Second elastic member;

[0037] 400. Plug. Detailed implementation manners

[0038] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be made in conjunction with the accompanying drawings of the specification.

[0039] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0041] Embodiment 1

[0042] Refer to Figures 1 to 8 , which is the first embodiment of the present invention. This embodiment provides an adjustable pharyngeal airway tube, including a bite piece 100, a gas conduit 200, an adjustment assembly and a cleaning mechanism. The distance between the sampling airway 203 and the oxygen outlet 1003 is automatically adjusted according to the oxygen outlet flow rate. The greater the oxygen flow rate, the greater the distance between the two. When the oxygen flow rate is large and the distance from the oxygen outlet 1003 is relatively close, when the negative pressure in the sampling airway 203 sucks the end-tidal carbon dioxide, too much oxygen is inhaled, which affects the detection result.

[0043] Specifically, it includes: a bite piece 100, and a through hole 101 is formed in the bite piece 100;

[0044] A gas conduit 200, the gas conduit 200 is movably clamped in the through hole 101. The gas conduit 200 includes a main exhaust passage 201 and an oxygen supply interlayer 202. A sampling airway 203 is provided in the main exhaust passage 201, and oxygen flows out from the area between the oxygen supply interlayer 202 and the main exhaust passage 201;

[0045] Adjustment assembly, including an impeller 300 rotatably sleeved between the oxygen supply interlayer 202 and the main exhaust duct 201, the impeller 300 controlling the sampling airway 203 to move away from the oxygen supply interlayer 202 when the oxygen intake flow rate increases;

[0046] Cleaning mechanism, including a plug 400 provided at the end face of the sampling airway 203, the plug 400 removing the mucus on the inner wall of the main exhaust duct 201 when the sampling airway 203 moves.

[0047] Among them, through holes 101 are symmetrically provided on both sides of the bite 100, and the gas conduit 200 is snap-fitted to the through holes 101 through elastic buckles to prevent shaking during use. The through hole 101 in the center of the bite 100 is for the endoscope lens to pass through.

[0048] Preferably, the end faces of the gas conduit 200 are respectively communicated with an intake pipe 1001 and an outlet pipe 1002. The intake pipe 1001 is communicated with the oxygen supply interlayer 202, the main exhaust duct 201 is communicated with the outlet pipe 1002, the sampling airway 203 is slidably arranged in the outlet pipe 1002, and a series of oxygen outlets 1003 are provided at one end of the oxygen supply interlayer 202 close to the main exhaust duct 201.

[0049] Among them, a first cylinder 1004 is fixedly arranged in the main exhaust duct 201, a second cylinder 1005 is slidably arranged in the first cylinder 1004, a third cylinder 1006 is slidably arranged in the second cylinder 1005, and the sampling airway 203 penetrates through the third cylinder 1006 and moves synchronously with it.

[0050] Preferably, a first water bag 1007 and a second water bag 1008 are respectively arranged inside the main exhaust duct 201, a first flow channel 1009 is opened on the first cylinder 1004, and a second flow channel 1011 is opened on the second cylinder 1005.

[0051] Among them, the first flow channel 1009 is communicated with the first water bag 1007 through an oil pipe, and the second flow channel 1011 is communicated with the second water bag 1008 through an oil pipe. In this embodiment, the first water bag 1007 and the second water bag 1008 are connected through a piston cylinder. The piston is slidably sealed in the piston cylinder. When the piston slides along the piston cylinder towards the first water bag 1007, it drives the liquid in the piston cylinder to flow into the first water bag 1007 respectively, increasing its pressure. At the same time, the liquid in the second water bag 1008 is replenished into the piston cylinder, resulting in a decrease in the pressure of the second water bag 1008.

[0052] Among them, the first cylinder 1004 is located in the direction close to the outlet end of the main exhaust duct 201 and is made of soft plastic to avoid damaging the body. The volume of the first cylinder 1004 is the largest. The second cylinder 1005 is slidably arranged inside the first cylinder 1004. The outer wall of the first cylinder 1004 is provided with a hole groove, so that the excess exhaled gas can pass through and be discharged through the main exhaust duct 201.

[0053] Preferably, in this embodiment, the movement of the piston is driven by a cylinder, and the moving stroke of the cylinder is controlled by the rotational speed of the impeller 300. When the oxygen intake increases, the rotational speed of the impeller 300 increases. The rotational speed sensor monitors the signal and controls the piston to move towards the first water bladder 1007 for position adjustment.

[0054] In summary, during use, due to the different physical conditions of different patients, when an adult male patient uses it, the oxygen demand is relatively large. Therefore, a relatively high oxygen intake is set, which simultaneously drives the increase in the rotational speed of the impeller 300. The piston moves towards the first water bladder 1007, driving the liquid to flow into the first water bladder 1007. The liquid with increased pressure enters the first cylinder 1004 through the first flow channel 1009 and pushes the second cylinder 1005 to continue sliding outwards. At the same time, the liquid also synchronously enters the second cylinder 1005 and pushes the third cylinder 1006 to move, driving the sampling airway 203 to move outwards. The sampling airway 203 slides towards the end position of the main exhaust airway 201, increasing the distance from the oxygen outlet 1003. The distance between the sampling airway 203 and the oxygen outlet 1003 is automatically adjusted according to the oxygen outlet flow rate. The greater the oxygen flow rate, the greater the distance between the two, avoiding excessive oxygen inhalation when the oxygen flow rate is large and the distance from the oxygen outlet 1003 is relatively close, which may affect the detection result when the negative pressure in the sampling airway 203 sucks the end-expiratory carbon dioxide.

[0055] At the same time, when it is used by a patient with a relatively small oxygen demand, the rotational speed of the impeller 300 decreases, and the liquid flows towards the second water bladder 1008. Thus, the liquid enters the cavity formed by the second cylinder 1005 and the third cylinder 1006 through the second flow channel 1011 and squeezes to drive the third cylinder 1006 to move back. Further, it also enters the cavity between the second cylinder 1005 and the first cylinder 1004, causing the overall retraction of the second cylinder 1005, and finally realizing the retraction of the sampling airway 203. In the case of a relatively small oxygen outlet volume, the sampling of end-expiratory carbon dioxide is not affected, and at the same time, the retraction distance into the main exhaust airway 201 increases, avoiding the suction of mucus and other impurities into the sampling airway 203 by negative pressure, resulting in blockage.

[0056] Embodiment 2

[0057] Referring to Figures 1 to 8 , this is the second embodiment of the present invention. Based on the previous embodiment, the difference is that a sealing plate 3015 is used to replace the piston. The movement of the sealing plate 3015 is directly controlled by the rotational speed of the impeller 300. The telescopic position of the sampling airway 203 is controlled by the change in the input gas flow rate. At the same time, the reciprocating movement of the plug 400 is used to clear the blockage of mucus and water vapor.

[0058] Specifically, a rotating ring 3001 is coaxially sleeved outside the impeller 300. Ratchet teeth 3002 are provided on the inner wall of the rotating ring 3001, and a rotating shaft 3003 is provided on the outer wall of the rotating ring 3001. After the rotation speed of the impeller 300 exceeds a set threshold value, the impeller 300 starts to drive the rotating ring 3001 and the rotating shaft 3003 to rotate.

[0059] Wherein, in this embodiment, tooth-shaped blocks are circumferentially and arrayed on the outer wall of the rotating ring 3001, a curve groove is provided on the outer wall of the rotating shaft 3003, the tooth-shaped blocks are slidably arranged inside the curve groove, and after the previous tooth-shaped block disengages from the curve groove, the next tooth-shaped block just slides into the curve groove, so that only one tooth-shaped block is in contact with the curve groove at the same time. When each tooth-shaped block rotates following the rotating ring 3001, it drives the curve groove to rotate respectively.

[0060] Wherein, one end of the impeller 300 is rotatably arranged on the outer wall of the sampling air duct 203, and a connecting ring 3004 is fixedly arranged at the other end. A groove 3005 is formed on the end face of the connecting ring 3004, and a ratchet pawl 3006 is rotatably arranged in the groove 3005.

[0061] Preferably, a first elastic member 3007 is provided between the outer wall of the ratchet pawl 3006 and the inner wall of the groove 3005. In the initial state, the first elastic member 3007 pulls the ratchet pawl 3006 to retract into the groove 3005. After the rotation speed of the connecting ring 3004 exceeds the set rotation speed threshold value, the ratchet pawl 3006 swings outwards and engages with the ratchet teeth 3002.

[0062] Further, the first elastic member 3007 is a spring, and the elastic coefficient of the spring is selected according to the set speed threshold value. The larger the elastic coefficient, the greater the centrifugal force required to overcome the elastic force of the first elastic member 3007, and the higher the set speed threshold value.

[0063] Wherein, a pulley 3008 is provided at one end of the rotating shaft 3003. A communication cavity 3009 is provided between the first water sac 1007 and the second water sac 1008. A rack 3011 is slidably arranged in the communication cavity 3009, and a transmission gear 3012 is meshed on the upper end face of the rack 3011.

[0064] Preferably, a circular ring groove 3013 is formed on one end face of the transmission gear 3012, a synchronous belt 3014 is sleeved between the circular ring groove 3013 and the outer wall of the pulley 3008, and a sealing plate 3015 is slidably arranged at the end of the rack 3011 far away from the pulley 3008.

[0065] Wherein, one end of the synchronous belt 3014 slidably penetrates through the inner wall of the communication cavity 3009 and is sleeved on the pulley 3008, so as to transmit power to the transmission gear 3012 and prevent the liquid in the communication cavity 3009 from leaking. The transmission gear 3012 is rotatably arranged at the central position of the communication cavity 3009.

[0066] Further, the sealing plate 3015 is slidably and fittedly arranged on the inner wall of the communication cavity 3009 and divides the communication cavity 3009 into two chambers.

[0067] Preferably, sliding columns 3016 are provided at both ends of the rack 3011 in a sliding manner. A single tooth 3017 is provided at the other end of the sliding column 3016. A second elastic member 3018 is provided between the single tooth 3017 and the rack 3011.

[0068] Among them, the single tooth 3017 is a rack with one tooth. The second elastic member 3018 is a spring. In the initial state, the spring pushes the single tooth 3017 away from the rack 3011. One end face of the single tooth 3017 is also fixedly connected to the sealing plate 3015.

[0069] More preferably, the first water bag 1007, the communication cavity 3009 and the second water bag 1008 are all filled with liquid. As the sealing plate 3015 slides left and right, the liquid in the communication cavity 3009 flows in two directions respectively, so as to realize the expansion and contraction of the sampling airway 203.

[0070] Similarly, third elastic members are provided on both sides of the rack 3011 and on both sides of the inner wall of the communication cavity 3009 at the same time. The third elastic members on both sides make the rack 3011 located at the central position of the communication cavity 3009 in the initial state and always have a tendency of automatic reset.

[0071] In summary, during use, as the oxygen intake increases, the rotational speed of the impeller 300 increases to the set threshold. At this time, the centrifugal force of the pawl 3006 overcomes the pulling force of the first elastic member 3007, rotates outward and engages with the ratchet teeth 3002, and finally drives the rotating ring 3001 and the rotating shaft 3003 to rotate. Subsequently, the belt pulley 3008 drives the transmission gear 3012 to rotate through the synchronous belt 3014, and finally drives the rack 3011 to move towards the first water bag 1007. At the same time, the pressure of the first water bag 1007 increases because the liquid in the communication cavity 3009 flows in, and the pressure of the second water bag 1008 decreases because the liquid in it flows into the communication cavity 3009, so as to realize the adjustment of the expansion and contraction position of the sampling airway 203.

[0072] At the same time, when the gas introduced into the air inlet pipe 1001 is changed to a stroboscopic mode, the gas flow rate is distributed in a sine wave. The sampling airway 203 continuously expands and contracts following the gas flow rate, and at the same time automatically resets under the action of the third elastic member. In this way, the sampling airway 203 reciprocally expands and contracts, driving the plug 400 to slide up and down in the main exhaust airway 201, and at the same time poking out the mucus blocking the outlet position of the main exhaust airway 201, so as to avoid the influence of mucus blockage on gas exhalation and the collection of end-tidal carbon dioxide.

[0073] Embodiment 3

[0074] Refer to Figures 1 - 9, which is the third embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that the sampling airway 203 is guided by the rolling ring 2001, and at the same time, the water vapor in the exhaled gas is adsorbed to prevent mucus and water vapor from blocking the gas conduit 200.

[0075] Specifically, a rolling ring 2001 is provided at a position near the outlet of the main exhaust airway 201 of the sampling airway 203. The rolling ring 2001 is driven to roll synchronously when the sampling airway 203 moves.

[0076] Preferably, a corrugated scraper 2002 is provided on the outer wall of the plug 400, and a blocking net 2003 is also provided on the end face of the plug 400. The plug 400 is rotatably arranged on the inner wall of the main exhaust airway 201.

[0077] Among them, the rolling ring 2001 is in a circular shape and made of water-absorbing sponge material to adsorb the moisture in the exhaled gas. An airway is provided on the plug 400, so that the exhaled gas can enter the main exhaust airway 201 through the airway via the plug 400, while blocking impurities such as mucus.

[0078] Furthermore, the blocking net 2003 and the corrugated scraper 2002 are made of sponge material. While absorbing the water vapor in the exhaled gas, they scrape and remove the adhered mucus objects to prevent blockage.

[0079] Among them, a spiral groove 2004 is further provided on the inner wall of the plug 400, and a sphere 2005 is rotatably arranged on the outer wall of the sampling airway 203. The sphere 2005 rolls on the inner wall of the spiral groove 2004.

[0080] Exemplarily, in other embodiments, the main exhaust airway 201 is made of soft rubber material. When the rolling ring 2001 expands, it squeezes the main exhaust airway 201 to expand outward, and makes the main exhaust airway 201 at this place fit and seal with the oxygen outlet 1003 on the oxygen supply sandwich layer 202. Oxygen can only flow out from the oxygen outlet 1003 above the rolling ring 2001. When the sampling airway 203 moves downward, the rolling ring 2001 rolls a distance of 1 / π at the same linear speed, so that the number of oxygen outlets 1003 that can discharge gas increases, preventing the oxygen injection speed from being too large and mixing into the sampling airway 203. When the gas flow rate is small, some oxygen outlets 1003 are closed to prevent mucus from entering.

[0081] Exemplarily, in other embodiments, when the sampling airway 203 moves to the lowermost end, the rolling ring 2001 rolls to the plug 400, so that the rolling ring 2001 fits and compresses the plug 400, and the adsorbed water vapor inside is compressed and discharged, ensuring the good water absorption of the rolling ring 2001.

[0082] In summary, during use, as the sampling airway 203 reciprocates and extends, it drives the rolling ring 2001 to roll along the inner wall of the main exhaust airway 201, playing a guiding role to prevent the sampling airway 203 from bending or the inlet from fitting against the inner wall of the main exhaust airway 201. Meanwhile, the rolling ring 2001 can also adsorb the water vapor in the exhaled gas.

[0083] At the same time, when the sampling airway 203 slides downward, it drives the spiral groove 2004 to rotate through the sphere 2005, thereby rotating the corrugated scraper 2002 with a spiral shape on the outer wall of the plug 400 to remove the mucus and water vapor on the main exhaust airway 201 and prevent the mucus and water vapor from blocking the gas conduit 200.

[0084] It is important to note that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the positions of the elements may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangements of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to a variety of modifications that still fall within the scope of the appended claims.

[0085] In addition, to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present invention or those features that are not relevant to implementing the present invention).

[0086] It should be understood that in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, such development efforts will be a routine task of design, manufacturing and production.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An adjustable pharyngeal airway tube, characterized in that: It includes: A bite piece (100) with a through hole (101) formed thereon; A gas conduit (200), the gas conduit (200) is movably clamped in the through hole (101), the gas conduit (200) includes a main exhaust passage (201) and an oxygen supply sandwich layer (202), and a sampling airway (203) is provided in the main exhaust passage (201), and oxygen flows out from the area between the oxygen supply sandwich layer (202) and the main exhaust passage (201); An adjustment assembly, including an impeller (300) rotatably sleeved between the oxygen supply sandwich layer (202) and the main exhaust passage (201), and the impeller (300) controls the sampling airway (203) to move away from the oxygen supply sandwich layer (202) when the oxygen intake flow rate increases; A first cylinder (1004) is fixedly provided in the main exhaust passage (201), a second cylinder (1005) is slidably provided in the first cylinder (1004), a third cylinder (1006) is slidably provided in the second cylinder (1005), the sampling airway (203) penetrates through the third cylinder (1006) and moves synchronously with it, and a first water sac (1007) and a second water sac (1008) are respectively provided in the main exhaust passage (201); A rotating ring (3001) is coaxially sleeved outside the impeller (300), ratchet teeth (3002) are provided on the inner wall of the rotating ring (3001), a rotating shaft (3003) is provided on the outer wall of the rotating ring (3001), and the impeller (300) starts to drive the rotating ring (3001) and the rotating shaft (3003) to rotate after the rotation speed exceeds a set threshold; One end of the impeller (300) is rotatably provided on the outer wall of the sampling airway (203), and a connecting ring (3004) is fixedly provided at the other end. A groove (3005) is formed on the end face of the connecting ring (3004), and a ratchet pawl (3006) is rotatably provided in the groove (3005); A first elastic member (3007) is provided between the outer wall of the ratchet pawl (3006) and the inner wall of the groove (3005). One end of the rotating shaft (3003) is provided with a belt pulley (3008). A communication cavity (3009) is provided between the first water sac (1007) and the second water sac (1008), and a rack (3011) is slidably provided in the communication cavity (3009), and a transmission gear (3012) is meshed on the upper end face of the rack (3011); A circular ring groove (3013) is formed on one end face of the transmission gear (3012), and a synchronous belt (3014) is sleeved between the circular ring groove (3013) and the outer wall of the belt pulley (3008); A cleaning mechanism, including a plug (400) provided on the end face of the sampling airway (203), and the plug (400) clears the mucus on the inner wall of the main exhaust passage (201) when the sampling airway (203) moves.

2. The adjustable pharyngeal airway according to claim 1, wherein: The end faces of the gas conduit (200) are respectively communicated with an air inlet pipe (1001) and an air outlet pipe (1002). The air inlet pipe (1001) is communicated with the oxygen supply interlayer (202), the main exhaust duct (201) is communicated with the air outlet pipe (1002), the sampling air duct (203) is slidably arranged in the air outlet pipe (1002), and oxygen outlets (1003) are arranged in an array at one end of the oxygen supply interlayer (202) close to the main exhaust duct (201).

3. The adjustable pharyngeal airway according to claim 2, wherein: A first flow channel (1009) is formed in the first cylinder (1004), and a second flow channel (1011) is formed in the second cylinder (1005).

4. The adjustable pharyngeal airway according to claim 3, wherein: In the initial state, the first elastic member (3007) pulls the pawl (3006) to retract into the groove (3005). After the rotational speed of the connecting ring (3004) exceeds the set rotational speed threshold, the pawl (3006) swings outwards and engages with the ratchet teeth (3002).

5. The adjustable pharyngeal airway according to claim 4, wherein: A sealing plate (3015) is slidably arranged at one end of the rack (3011) away from the pulley (3008).

6. The adjustable pharyngeal airway according to claim 5, characterized in that: Sliding columns (3016) are arranged at both ends of the rack (3011) simultaneously. A single tooth (3017) is arranged at the other end of the sliding column (3016). A second elastic member (3018) is arranged between the single tooth (3017) and the rack (3011).

7. The adjustable pharyngeal airway according to claim 6, wherein: A rolling ring (2001) is arranged at a position of the sampling air duct (203) close to the outlet of the main exhaust duct (201). When the sampling air duct (203) moves, the rolling ring (2001) is driven to roll synchronously; A corrugated scraper (2002) is arranged on the outer wall of the plug (400). A blocking net (2003) is also arranged on the end face of the plug (400). The plug (400) is rotatably arranged on the inner wall of the main exhaust duct (201).

8. The adjustable pharyngeal airway according to claim 7, wherein: A spiral groove (2004) is further arranged on the inner wall of the plug (400). A sphere (2005) is rotatably arranged on the outer wall of the sampling air duct (203). The sphere (2005) rolls on the inner wall of the spiral groove (2004).

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