Medical visualized auxiliary sputum suction oropharyngeal tube

Abstract

The application discloses a medical visualized auxiliary sputum suction oropharyngeal tube, which comprises a tube body, a traction structure and a first auxiliary positioning structure; the tube body comprises a mouth containing part and a throat inserting part. After the medical staff puts the tube body into the oral cavity of a patient, the medical staff pulls the holding part out of the oral cavity. The holding part drives the throat inserting part to bend and rise towards the mouth containing part through the driven part. With the end of the throat inserting part gradually rising, the first flexible liquid bag of the first auxiliary positioning structure is elastically deformed under extrusion, so that the indicating solution filled in the first flexible liquid bag is extruded into the first indicating liquid pipe connected with the first flexible liquid bag and forms a liquid column in the first indicating liquid pipe. The operator can clearly observe the liquid column by irradiating the oral cavity through a light source such as a flashlight. The medical staff can accurately judge that the end of the tube body has been aligned with the tracheal opening according to the preset scale on the first indicating liquid pipe. The application reduces the cost through the physical visualization method and is beneficial to clinical popularization and application.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical visual assisted suction oropharyngeal tube. Background Technology

[0002] In clinical nursing, for patients who cannot cough up sputum on their own, an oropharyngeal airway (oropharyngeal tube) is often used in conjunction with a suction catheter for manual suctioning. The function of the oropharyngeal tube is to: establish a smooth passage from the oral cavity to the end of the pharynx, prevent the tongue from falling back and obstructing the airway, and provide a guiding path for the suction catheter so that it can be inserted deep into the trachea for suctioning.

[0003] To ensure that the suction catheter can be accurately inserted into the trachea, existing technologies have developed visual assisted suction oropharyngeal tubes. By integrating a miniature camera or fiber optic imaging system at the end of the tube, medical staff can observe the position of the suction catheter in the human throat in real time on a display screen, so as to accurately place the suction catheter into the trachea.

[0004] However, electronic visualization design is costly and difficult to widely adopt. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a medical visual assisted suction oropharyngeal tube that can reduce manufacturing costs and facilitate widespread use.

[0006] The objective of this invention is achieved by the following technical solution: a medical visual assisted suction oropharyngeal tube, comprising: a tube body, a traction structure, and a first auxiliary positioning structure;

[0007] The tube has a receiving cavity extending through both ends of the tube, and the receiving cavity is used to receive a suction catheter; the tube includes a mouthpiece and a pharyngeal insertion part, which are connected sequentially in a direction opposite to the suction direction; the pharyngeal insertion part is bent away from the mouthpiece and extends in the direction of gravity, and the pharyngeal insertion part is used to be inserted into the human larynx; the side closer to the bending axis of the pharyngeal insertion part is defined as the inner side of the tube, and the side away from the bending axis of the pharyngeal insertion part is defined as the outer side of the tube;

[0008] The traction structure is provided on the tube body. The traction structure has a gripping part for human hand drive and a strip-shaped driven part. The gripping part is linked to one end of the strip-shaped driven part, and the other end of the strip-shaped driven part is linked to the end of the pharyngeal insertion part.

[0009] When a person drives the gripping part to move away from the mouth part, the strip-shaped driven part causes the end of the throat insertion part to bend and curl up in the direction closer to the mouth part.

[0010] As the gripping part moves toward the mouth part, the end of the throat insertion part bends and moves away from the mouth part until the end of the throat insertion part returns to its unbent and raised state.

[0011] The first auxiliary positioning structure is disposed on the inner side wall of the tube body. The first auxiliary positioning structure includes a first flexible liquid bladder and a first indicator liquid tube. The first flexible liquid bladder is disposed at the end of the pharyngeal insertion part and extends circumferentially along the outer wall of the pharyngeal insertion part. The first flexible liquid bladder is filled with an indicator solution. One end of the first indicator liquid tube is connected to the first flexible liquid bladder, and the other end of the first indicator liquid tube extends along the length direction of the pharyngeal insertion part to the mouth part.

[0012] Furthermore, the tube body is provided with a first receiving groove, which is located on the inner side wall of the tube body and extends along the length of the tube body to the end of the pharyngeal insertion part;

[0013] The traction structure includes a traction rope and a pull ring. The traction rope is disposed in the first receiving groove. One end of the traction rope is connected to the end of the throat insertion part, and the other end of the traction rope extends out of the first receiving groove and is connected to the pull ring.

[0014] Furthermore, the tube body is also provided with a baffle, which is sleeved on the outer wall of the mouthpiece and is used to prevent the mouthpiece from entering the human throat.

[0015] Furthermore, the mouthpiece is also provided with a second annular receiving groove, which is distributed at intervals with the baffle along the direction close to the throat insertion part, and the second annular receiving groove is used to receive human teeth.

[0016] Furthermore, the second annular receiving groove is connected to the first receiving groove.

[0017] Furthermore, the medical visual assisted suction oropharyngeal tube also includes a locking member, the proximal end of which is oscillatingly connected to the outer wall of the mouthpiece and located on one side of the traction rope, so that the distal end of the locking member can oscillate relative to the proximal end of the locking member; the locking member extends across the traction rope so that the distal end of the locking member extends to the other side of the traction rope, and the distal end of the locking member can be connected to the side wall of the mouthpiece to lock the traction rope between the locking member and the outer wall of the mouthpiece, or the distal end of the locking member disengages from the outer wall of the mouthpiece so that the traction rope can slide back and forth within the first receiving groove.

[0018] Furthermore, the indicator solution is a colored liquid.

[0019] Furthermore, the medical visual assisted suction oropharyngeal tube also includes a second auxiliary positioning structure, which is disposed on the outer wall of the tube body; the second auxiliary positioning structure includes a second flexible sac and a second indicator tube; the second flexible sac is disposed at the end of the pharyngeal insertion part and extends circumferentially along the outer wall of the pharyngeal insertion part, and the second flexible sac is filled with an indicator solution; one end of the second indicator tube is connected to the second flexible sac, and the other end of the second indicator tube extends along the length direction of the pharyngeal insertion part to the mouthpiece.

[0020] Furthermore, the pharyngeal insertion portion is provided with an annular guide rail and an annular extension guide ring. The annular guide rail extends through the end of the side wall of the pharyngeal insertion portion along its length and communicates with the receiving cavity. The annular extension guide ring slides with the annular guide rail so that the annular extension guide ring extends out of the end of the pharyngeal insertion portion, and the inner side wall of the annular extension guide ring abuts against the outer wall of the suction tube.

[0021] Furthermore, the medical visual assisted suction oropharyngeal tube also includes multiple annular flexible skirts, which are disposed within the annular guide rail. One end of the annular flexible skirt is connected to the inner wall of the annular flexible skirt, and the annular flexible skirt is located below the annular extended guide ring. The multiple annular flexible skirts are distributed at intervals along the length direction of the annular guide rail, and the multiple annular flexible skirts are used for damping cooperation with the annular extended guide ring.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. When the gripping part is moved away from the mouthpiece by a human hand (e.g., by pulling or rotating), the strip-shaped driven part causes the end of the pharyngeal insertion part to bend and curve upwards towards the mouthpiece. After the tube is placed in position, the end of the pharyngeal insertion part is located above the trachea and esophagus. According to human physiological structure, the trachea is located on the front of the neck and the esophagus is located on the back of the neck. Therefore, when the gripping part is moved away from the oral cavity by a human hand, the strip-shaped driven part moves along with it away from the oral cavity. Since the mouthpiece is fixed by the patient's bite, the end of the pharyngeal insertion part undergoes elastic deformation under the pull of the traction structure, thus bending and curving upwards towards the mouthpiece. As the end of the pharyngeal insertion part bends and curves upwards, the inner wall of the tube gradually approaches the anterior wall of the trachea until it contacts the anterior wall of the trachea. The change from no contact to contact between the inner wall of the tube and the anterior wall of the trachea forms the basis for the subsequent visual changes. When the inner wall of the suction tube contacts the anterior wall of the trachea, the end of the pharyngeal insertion section is positioned above the trachea. Thus, when a visual change occurs, medical staff can determine that the tube is aligned with the trachea. At this point, the suction catheter can be accurately inserted into the trachea for suctioning.

[0024] 2. When the holding part moves towards the mouthpiece, the end of the pharyngeal insertion part bends away from the mouthpiece until it returns to its unbent, raised state. This reduces the elastic deformation of the end of the pharyngeal insertion part, causing it to retract. This means that at least one of the driven part of the traction structure and the tube body has the elastic force to return to its original shape after bending. The tube body can be made of materials with bending and deformation capabilities, such as PP tube, metal tube (e.g., aluminum tube), or rubber tube. It is understood that if the end of the pharyngeal insertion part is excessively bent, the suction catheter will contact the anterior wall of the trachea during continuous descent, which will not only scratch the trachea but also restrict the descent of the suction catheter, preventing it from reaching the deep trachea for suctioning. Therefore, after confirming that the suction catheter has entered the trachea, the holding part needs to be driven to retract the end of the pharyngeal insertion part to reduce its bending and raising degree, thereby improving the verticality of the suction catheter. In this way, the suction catheter can be smoothly inserted deep into the trachea to complete the suctioning operation.

[0025] 3. The first auxiliary positioning structure is located on the inner wall of the tube body. After the pharyngeal insertion part is inserted into place, the first auxiliary positioning structure faces the anterior wall of the trachea. The first auxiliary positioning structure is located between the inner wall of the tube body and the anterior wall of the trachea. As the inner wall of the tube body gradually approaches the anterior wall of the trachea, the first auxiliary positioning structure is squeezed by the anterior wall of the trachea and the inner wall of the tube body. The first auxiliary positioning structure includes a first flexible liquid sac and a first indicator liquid tube. The first flexible liquid sac is made of an elastically deformable material (e.g., medical rubber material), so that its internal volume changes when squeezed by the anterior wall of the trachea and the inner wall of the tube body. The first flexible liquid sac is located at the end of the pharyngeal insertion part to be squeezed by the anterior wall of the trachea and the inner wall of the tube body, and extends circumferentially along the outer wall of the pharyngeal insertion part, thereby expanding the compression area of ​​the first flexible liquid sac. The first flexible liquid sac is filled with an indicator solution, which needs to be made of an edible reagent (e.g., physiological saline). The indicator solution is used to reflect the first flexible liquid sac. The first indicator tube is connected to the first flexible fluid bag at one end, and the other end extends along the length of the pharyngeal insertion portion to the oral cavity. Specifically, when the first flexible fluid bag is compressed, its volume decreases, and the indicator solution inside is squeezed into the first indicator tube, generating a liquid column. The longer the liquid column, the greater the squeezing force. Through specific design, graduations can be marked on the first indicator tube. If the liquid column length is longer than the graduation, it indicates that the end of the pharyngeal insertion portion is facing the trachea, and the suction catheter can be safely inserted. Considering that the first indicator tube is located inside the oral cavity, medical staff can use a flashlight to illuminate the oral cavity to observe the changes in the liquid column.

[0026] 4. This application uses a physical visualization method (i.e., by observing the change in the liquid column of the first indicator tube) to determine whether the tube is in place. Compared with the use of electronic visualization methods (such as fiberoptic bronchoscope) for assisted suctioning, this method reduces costs and is conducive to widespread clinical application. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the medical visual assisted suction oropharyngeal tube of the present invention;

[0028] Figure 2 for Figure 1 The sectional view shown;

[0029] Figure 3 for Figure 2 The diagram shows a magnified view of the structure at point A.

[0030] Figure 4 for Figure 2 A magnified schematic diagram of the local structure at point B is shown.

[0031] In the figure: 1. Tube body; 11. Receptacle; 12. Mouthpiece; 13. Throat insertion part; 131. Annular guide rail; 14. First accommodating groove; 15. Second annular accommodating groove; 2. Traction structure; 21. Traction rope; 22. Pull ring; 3. First auxiliary positioning structure; 31. First flexible liquid bladder; 32. First indicator liquid tube; 4. Baffle; 5. Locking element; 6. Second auxiliary positioning structure; 61. Second flexible liquid bladder; 62. Second indicator liquid tube; 7. Annular extended guide ring; 8. Annular flexible skirt. Detailed Implementation

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The working principle of this invention is as follows: Depending on the clinical situation, medical personnel choose either the reverse insertion method or the tongue depressor method (described later) to insert the tube 1 into the patient's oral cavity. Due to differences in the structure of the human larynx, the initially inserted end of the tube 1 may not accurately point to the trachea. At this time, the operator actively adjusts the angle of the end of the pharyngeal insertion part 13 through the traction structure 2. The medical personnel hold the gripping part with their hand and apply a pulling force to move it out of the oral cavity. The gripping part drives the driven part to move together, and the driven part pulls the end of the pharyngeal insertion part 13, causing it to overcome its own elasticity and bend and tilt towards the oral cavity 12. As the end of the pharyngeal insertion part 13 gradually tilts upward, the inner wall of the tube 1 continuously approaches the anterior wall of the trachea until the two are in close contact. When the inner wall of the tube 1 contacts the anterior wall of the trachea and generates compression, the first auxiliary positioning structure 3 located on the inner wall of the tube 1 begins to work. The first flexible liquid bladder 31 is located at the end of the pharyngeal insertion part 13 and is clamped between the anterior wall of the trachea and the inner wall of the tube 1. As the pressure increases, the first flexible liquid bladder 31 undergoes elastic deformation, reducing its internal volume and forcing the indicator solution inside to be squeezed into the first indicator tube 32 connected to it. The first indicator tube 32 extends along the tube body 1 to the oral cavity 12, within the operator's field of vision. As the indicator solution enters, a visible liquid column forms within the first indicator tube 32. The operator can clearly observe the liquid column by shining a light source such as a flashlight into the oral cavity. The length of the liquid column is directly proportional to the degree of compression; that is, the greater the angle of the bend at the end and the closer the contact with the anterior wall of the trachea, the longer the liquid column. Medical personnel can accurately determine whether the end of the tube body 1 is aligned with the tracheal opening based on the preset scale on the first indicator tube 32.

[0036] like Figures 1 to 2 As shown, a preferred embodiment of the medical visual assisted suction oropharyngeal tube of the present invention includes: tube body 1, traction structure 2 and first auxiliary positioning structure 3;

[0037] The tube body 1 has a receiving cavity 11, which extends through both ends of the tube body 1. The receiving cavity 11 is used to receive a suction tube. After the suction tube is inserted into the receiving cavity 11, both ends of the suction tube can extend out of both ends of the tube body 1. One end of the suction tube is equipped with a negative pressure suction device, and the other end extends into the trachea, thus enabling negative pressure suction of sputum from the trachea. The tube body 1 includes a mouthpiece 12 and a pharyngeal insertion part 13. The mouthpiece 12 and the pharyngeal insertion part 13 are connected sequentially in a direction opposite to the suction direction. The mouthpiece 12 and the pharyngeal insertion part 13 are integrally formed. The mouthpiece 12 is used for the patient's teeth to bite down. The pharyngeal insertion part 13 extends outward from the direction of suction. The oral portion 12 is bent and extends in the direction of gravity. The pharyngeal insertion portion 13 has a shape adapted to the human larynx so that after the tube body 1 is inserted into the patient's oral cavity, the end of the pharyngeal insertion portion 13 is approximately at the junction of the trachea and laryngopharynx. The pharyngeal insertion portion 13 is used to insert into the human larynx. The suction catheter can be inserted into the receiving cavity 11 after the tube body 1 is inserted into the oral cavity, or the suction catheter can be inserted into the receiving cavity 11 first and then inserted into the oral cavity together with the tube body 1. The latter insertion sequence is easier to operate, but it should be noted that when using the latter insertion method, the suction catheter should not extend beyond the end of the pharyngeal insertion end to avoid the suction catheter entering the esophagus before auxiliary positioning. Based on the definition, the side closer to the bending axis of the pharyngeal insertion portion 13 is the inner side of the tube body 1, and the side farther away from the bending axis of the pharyngeal insertion portion 13 is the outer side of the tube body 1, for the convenience of subsequent structural description.

[0038] The tube 1 has two insertion methods. The first is the reverse insertion method: the pharyngeal insertion part 13 is inserted into the oral cavity with the palate facing upward (the inner side of the tube 1 is facing upward), and then pushed along the hard palate towards the pharynx until the end of the pharyngeal insertion part 13 is close to the posterior wall of the oropharynx. At this time, the tube 1 is rotated 180 degrees (so that the inner side of the tube 1 is facing downward), so that the pharyngeal insertion part 13 presses down on the root of the tongue while pressing up against the posterior wall of the oropharynx. Then, the tube 1 is pushed downward until the edge of the oral portion 12 slightly protrudes outside the oral cavity.

[0039] The second method is the tongue depressor method: First, use a tongue hook or tongue depressor to press down on the base of the patient's tongue, so that the tongue leaves the posterior pharyngeal wall, and then insert the tube 1 directly into the oral cavity with the inside of the tube 1 facing down along the tongue surface.

[0040] The traction structure 2 is disposed on the tube body 1. The traction structure 2 can be installed on the periphery of the tube body 1 or in the side wall of the tube body 1. The traction structure 2 has a gripping part for human hand drive and a strip-shaped driven part. As a preferred design, the gripping part is located outside the human mouth, and the horizontal cross-sectional area of ​​the gripping part is larger than the horizontal cross-sectional area of ​​the strip-shaped driven part to facilitate human hand gripping. The gripping part is linked to one end of the strip-shaped driven part (e.g., fixed connection, e.g., swing connection), and the other end of the strip-shaped driven part is linked to the end of the pharyngeal insertion part 13 (e.g., adhesive, or for example, one end of the strip-shaped driving part and the end of the pharyngeal insertion part 13 both have buckles, and the two buckles are fastened together). The strip-shaped driven part constitutes the power transmission arm in the traction structure 2.

[0041] When the gripping part is moved away from the mouthpiece 12 by a human hand (e.g., by pulling or rotating), the strip-shaped driven part causes the end of the pharyngeal insertion part 13 to bend and curl upwards towards the mouthpiece 12. After the tube body 1 is placed in position, the end of the pharyngeal insertion part 13 is located above the trachea and esophagus. According to human physiological structure, the trachea is located on the front of the neck and the esophagus is located on the back of the neck. Therefore, when the gripping part is moved away from the oral cavity by a human hand, the strip-shaped driven part moves along with it away from the oral cavity. Since the mouthpiece 12 is fixed by the patient's bite, the end of the pharyngeal insertion part 13 undergoes elastic deformation under the pull of the traction structure 2, thus bending and curling upwards towards the mouthpiece 12. As the end of the pharyngeal insertion part 13 bends and curls upwards, the inner wall of the tube body 1 gradually approaches the anterior wall of the trachea until it contacts the anterior wall of the trachea. The change from no contact to contact between the inner wall of the tube body 1 and the anterior wall of the trachea forms the basis for the subsequent visual changes. When the inner wall of tube 1 contacts the anterior wall of the trachea, the end of the pharyngeal insertion part 13 is positioned above the trachea. Thus, when a visual change occurs, medical staff can determine that tube 1 is aligned with the trachea. At this point, the suction catheter can be accurately inserted into the trachea for suctioning.

[0042] When the gripping part moves towards the mouthpiece 12, the end of the pharyngeal insertion part 13 bends away from the mouthpiece 12 until the end of the pharyngeal insertion part 13 returns to its unbent and raised state, thereby reducing the elastic deformation of the end of the pharyngeal insertion part 13 and causing the pharyngeal insertion part 13 to retract. This means that at least one of the driven part of the traction structure 2 and the tube body 1 has an elastic force that allows it to return to its original shape after bending. The tube body 1 can be made of materials with bending and deformation capabilities, such as PP tube, metal tube (e.g., aluminum tube), or rubber tube. It is understood that if the end of the pharyngeal insertion part 13 is excessively bent, the suction catheter will contact the anterior wall of the trachea when it is continuously lowered, which will not only scratch the trachea but also limit the downward stroke of the suction catheter, preventing it from entering the deep part of the trachea for suctioning. Therefore, after confirming that the suction catheter has entered the trachea, the holding part needs to be driven to retract the end of the pharyngeal insertion part 13 to reduce its bending and tilting, thereby improving the verticality of the suction catheter. In this way, the suction catheter can be smoothly inserted deep into the trachea to complete the suctioning operation.

[0043] The first auxiliary positioning structure 3 is located on the inner wall of the tube body 1. After the pharyngeal insertion part 13 is inserted into place, the first auxiliary positioning structure 3 faces the anterior wall of the trachea. The first auxiliary positioning structure 3 is located between the inner wall of the tube body 1 and the anterior wall of the trachea. As the inner wall of the tube body 1 gradually approaches the anterior wall of the trachea, the first auxiliary positioning structure is squeezed by the anterior wall of the trachea and the inner wall of the tube body 1. The first auxiliary positioning structure 3 includes a first flexible liquid sac 31 and a first indicator liquid tube 32. The first flexible liquid sac 31 is made of an elastically deformable material (e.g., medical rubber), thereby changing its internal volume when compressed by the anterior wall of the trachea and the inner wall of the tube body 1. The first flexible liquid sac 31 is located at the end of the pharyngeal insertion part 13 to be compressed by the anterior wall of the trachea and the inner wall of the tube body 1, and extends circumferentially along the outer wall of the pharyngeal insertion part 13, thereby increasing the compression area of ​​the first flexible liquid sac 31. The first flexible liquid sac 31 is filled with an indicator solution, which is made of an edible reagent (e.g., physiological saline). The indicator solution is used to reflect the first flexible liquid sac. 31. Is it under compression? One end of the first indicator tube 32 is connected to the first flexible liquid bag 31, and the other end of the first indicator tube 32 extends along the length of the pharyngeal insertion part 13 to the oral cavity 12. Specifically, when the first flexible liquid bag 31 is under compression, its volume decreases, and the indicator solution inside is squeezed into the first indicator tube 32, generating a liquid column. The longer the liquid column, the greater the squeezing force. Through specific design, a scale can be marked on the first indicator tube 32. If the liquid column is longer than the scale, it indicates that the end of the pharyngeal insertion part 13 is facing the trachea, and the suction catheter can be safely inserted. Considering that the first indicator tube 32 is located inside the oral cavity, medical staff can use a flashlight to illuminate the oral cavity to observe the changes in the liquid column of the indicator tube.

[0044] This application uses a physical visualization method (i.e., by observing the change in the liquid column of the first indicator tube 32) to determine whether the tube body 1 is in place. Compared with the use of electronic visualization methods (such as fiberoptic bronchoscopes) for assisted suctioning, this method reduces costs and is conducive to widespread clinical application.

[0045] like Figures 1 to 3 As shown, preferably, the tube body 1 is provided with a first receiving groove 14, which is located on the inner side wall of the tube body 1 and extends along the length of the tube body 1 to the end of the pharyngeal insertion part 13; the first receiving groove 14 is used to receive the driven part of the traction structure 2, so that the driven part of the traction structure 2 does not directly contact the human laryngeal structure, and avoids the driven part from scratching the larynx during movement.

[0046] The traction structure 2 includes a traction rope 21 and a pull ring 22. The traction rope 21 is the driven part of the traction structure 2, and the pull ring 22 is the gripping part of the traction rope 21. The traction rope 21 can be made of steel wire rope, nylon rope, etc. The traction rope 21 is located in the first receiving groove 14. One end of the traction rope 21 is connected to the end of the pharyngeal insertion part 13, and the other end of the traction rope 21 extends out of the first receiving groove 14 and is connected to the pull ring 22. Medical personnel pull the pull ring 22 outward, pulling the traction rope 21 out of the first receiving groove 14, thereby pulling the end of the pharyngeal insertion part 13 towards the anterior wall of the trachea. The operation is convenient, and the end of the pharyngeal insertion part 13 responds quickly. After the traction rope 21 is in place, medical personnel can manually press the traction rope 21 to keep the end of the pharyngeal insertion part 13 in a suitable bent and raised state.

[0047] like Figures 1 to 3 As shown, preferably, the tube body 1 is further provided with a baffle 4, which is sleeved on the outer wall of the mouthpiece 12. The baffle 4 is used to prevent the mouthpiece 12 from falling into the human throat. The baffle 4 is integrally formed on the outer wall of the mouthpiece 12. After the tube body 1 is inserted, the baffle 4 should be located outside the patient's teeth, with the back of the baffle 4 pressing against the patient's teeth, thereby preventing the mouthpiece 12 from falling into the human throat.

[0048] like Figures 1 to 3 As shown, preferably, the mouthpiece 12 is further provided with a second annular receiving groove 15. The second annular receiving groove 15 and the baffle 4 are distributed at intervals along the direction close to the pharyngeal insertion part 13. The second annular receiving groove 15 is used to receive human teeth. When the patient's teeth are partially embedded in the second annular receiving groove 15, relative slippage between the patient's teeth and the outer wall of the mouthpiece 12 can be avoided, making the tube 1 more securely fixed in the bite.

[0049] like Figures 1 to 3 As shown, preferably, the second annular receiving groove 15 is connected to the first receiving groove 14, so that the patient's teeth are sequentially embedded from the outer wall of the mouth part 12 into the second annular receiving groove 15 and the first receiving groove 14. The patient can bite the traction rope 21 while biting the mouth part 12. Preferably, the second annular receiving groove 15 is connected to the first receiving groove 14, so that the patient's teeth are sequentially embedded from the outer wall of the mouth part 12 into the second annular receiving groove 15 and the first receiving groove 14. The patient can bite the traction rope 21 while biting the mouth part 12, thereby fixing the traction rope 21 without the need for medical staff to manually press the traction rope 21.

[0050] like Figures 1 to 3As shown, preferably, the medical visual assisted suction oropharyngeal tube further includes a locking member 5, which can be medical adhesive tape or an arc-shaped metal strip; the proximal end of the locking member 5 is oscillatingly connected to the outer wall of the mouthpiece 12 and located on one side of the traction rope 21, so that the distal end of the locking member 5 can oscillate relative to the proximal end of the locking member 5; the locking member 5 crosses the traction rope 21 so that the distal end of the locking member 5 extends to the other side of the traction rope 21, and the distal end of the locking member 5 can be connected to the side wall of the mouthpiece 12 to lock the traction rope 21 between the locking member 5 and the outer wall of the mouthpiece 12, or the distal end of the locking member 5 is disengaged from the outer wall of the mouthpiece 12 so that the traction rope 21 can slide back and forth in the first receiving groove 14. Therefore, even when the patient is unconscious and cannot use their teeth to bite and fix the traction rope 21, medical staff can still fix the traction rope 21 to the tube body 1 using locking devices (medical tape for adhesion or metal strip for compaction).

[0051] like Figures 1 to 4 As shown, preferably, the indicator solution is a colored liquid. For example, anthocyanin indicators and turmeric indicator solutions are easier to identify than colorless solutions.

[0052] like Figures 1 to 4As shown, preferably, the medical visual assisted suction oropharyngeal tube further includes a second auxiliary positioning structure 6, which is disposed on the outer wall of the tube body 1 to locate whether the end of the pharyngeal insertion part 13 contacts the posterior wall of the trachea after retraction; the second auxiliary positioning structure 6 includes a second flexible liquid sac 61 and a second indicator liquid tube 62; the second flexible liquid sac 61 is disposed at the end of the pharyngeal insertion part 13 and extends circumferentially along the outer wall of the pharyngeal insertion part 13; the second flexible liquid sac 61 and the first flexible liquid sac 31 may or may not be connected; when the second flexible liquid sac 61 and the first flexible liquid sac 31 are not connected, the second flexible liquid sac 61 and the first flexible liquid sac 31 are not affected by each other, and the response error is lower; the second flexible liquid sac 61 is filled with an indicator solution, which is the same type of indicator solution as the indicator solution filled in the first flexible liquid sac 31; one end of the second indicator liquid tube 62 is connected to the second flexible liquid sac 61, and the other end of the second indicator liquid tube 62 extends along the length direction of the pharyngeal insertion part 13 to the mouthpiece 12. After confirming that the suction catheter has entered the trachea, push the pull ring 22 to retract it into the first receiving groove 14 via the traction rope 21. This causes the end of the pharyngeal insertion part 13 to retract, reducing its bending and tilting. At this time, the second flexible liquid sac 61 gradually approaches the posterior wall of the trachea until it is squeezed by the outer wall of the tube body 1 and the posterior wall of the trachea. The indicator solution in the second flexible liquid sac 61 flows to the second indicator liquid tube 62, forming a liquid column within it. By observing the changes in the liquid column of the first indicator liquid tube 32 (gradually decreasing) and the changes in the liquid column of the second indicator liquid tube 62 (gradually increasing), medical personnel can determine the degree of bending and tilting of the pharyngeal insertion part 13. The degree of bending and tilting of the pharyngeal insertion part 13 determines whether the suction catheter has entered the trachea vertically, thus allowing the suction catheter to penetrate deep into the trachea for suctioning.

[0053] like Figures 1 to 4 As shown, preferably, the pharyngeal insertion portion 13 is provided with an annular guide rail 131 and an annular extension guide ring 7. The annular guide rail 131 extends through the end of the side wall of the pharyngeal insertion portion 13 along its length and communicates with the receiving cavity 11. The annular extension guide ring 7 is slidably engaged with the annular guide rail 131 so that the annular extension guide ring 7 extends out of the end of the pharyngeal insertion portion 13, and the inner side wall of the annular extension guide ring 7 abuts against the outer wall of the suction tube. Specifically, during the lowering of the suction tube, the suction tube drives the annular extension guide ring 7 to extend out of the end of the pharyngeal insertion portion 13 and enter the upper part of the trachea, thereby assisting the suction tube to smoothly enter the trachea and preventing the suction tube from deviating.

[0054] like Figures 1 to 4As shown, preferably, the medical visual assisted suction oropharyngeal tube further includes multiple annular flexible skirts 8, which are made of medical rubber material; the annular flexible skirts 8 are disposed within the annular guide rail 131, one end of the annular flexible skirt 8 is connected to the inner wall of the annular flexible skirt 8, the annular flexible skirt 8 is located below the annular extended guide ring 7, and the multiple annular flexible skirts 8 are distributed at intervals along the length direction of the annular guide rail 131, and the multiple annular flexible skirts 8 are used for damping cooperation with the annular extended guide ring 7. As a preferred design, multiple annular flexible skirts 8 are located below the annular extended guide ring 7. When the suction catheter is lowered, causing the annular extended guide ring 7 to slide downwards on the annular guide rail 131, the annular extended guide ring 7 progressively squeezes the multiple annular flexible skirts 8, pushing the swinging ends of the annular flexible skirts 8 against the side wall of the annular guide rail 131. During this process, the annular flexible skirts 8 exert a frictional force on the annular extended guide ring 7 in the opposite direction of its sliding, slowing down its movement speed. Moreover, as the annular extended guide ring 7 moves downwards, it contacts more annular flexible skirts 8, and the greater the reverse frictional force it receives. Thus, the further the annular extended guide ring 7 slides downwards, the greater the sliding resistance, thereby restricting the rapid movement of the suction catheter into the deeper parts of the trachea. This avoids the suction catheter being inserted too deeply and injuring the inner wall of the trachea when medical personnel exert excessive force.

[0055] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A medical visual assisted suction oropharyngeal tube, characterized in that, include: The tube body has a receiving cavity extending through both ends of the tube body, and the receiving cavity is used to receive a suction catheter; the tube body includes a mouthpiece and a pharyngeal insertion part, which are connected sequentially in a direction opposite to the suction direction; the pharyngeal insertion part is bent away from the mouthpiece and extends in the direction of gravity, and the pharyngeal insertion part is used to be inserted into the human larynx; the side closer to the bending axis of the pharyngeal insertion part is defined as the inner side of the tube body, and the side away from the bending axis of the pharyngeal insertion part is defined as the outer side of the tube body; A traction structure is provided on the tube body. The traction structure has a gripping part for human hand drive and a strip-shaped driven part. One end of the gripping part is linked to one end of the strip-shaped driven part, and the other end of the strip-shaped driven part is linked to the end of the pharyngeal insertion part. When a person drives the gripping part to move away from the mouth part, the strip-shaped driven part causes the end of the throat insertion part to bend and curl up in the direction close to the mouth part. As the gripping part moves toward the mouth part, the end of the throat insertion part bends and moves away from the mouth part until the end of the throat insertion part returns to its unbent and raised state. A first auxiliary positioning structure is disposed on the inner side wall of the tube body. The first auxiliary positioning structure includes a first flexible liquid bladder and a first indicator liquid tube. The first flexible liquid bladder is disposed at the end of the pharyngeal insertion part and extends circumferentially along the outer wall of the pharyngeal insertion part. The first flexible liquid bladder is filled with an indicator solution. One end of the first indicator tube is connected to the first flexible liquid bladder, and the other end of the first indicator tube extends along the length of the pharyngeal insertion portion to the mouthpiece.

2. The medical visual assisted suction oropharyngeal tube according to claim 1, characterized in that: The tube body is provided with a first receiving groove, which is located on the inner side wall of the tube body and extends along the length of the tube body to the end of the pharyngeal insertion part; The traction structure includes a traction rope and a pull ring. The traction rope is disposed in the first receiving groove. One end of the traction rope is connected to the end of the throat insertion part, and the other end of the traction rope extends out of the first receiving groove and is connected to the pull ring.

3. The medical visual assisted suction oropharyngeal tube according to claim 2, characterized in that: The tube body is also provided with a baffle, which is sleeved on the outer wall of the mouthpiece and is used to prevent the mouthpiece from entering the human throat.

4. The medical visual assisted suction oropharyngeal tube according to claim 3, characterized in that: The mouthpiece is also provided with a second annular receiving groove, which is distributed at intervals with the baffle along the direction close to the throat insertion part. The second annular receiving groove is used to receive human teeth.

5. The medical visual assisted suction oropharyngeal tube according to claim 4, characterized in that: The second annular receiving groove is connected to the first receiving groove.

6. The medical visual assisted suction oropharyngeal tube according to claim 2, characterized in that: The medical visualization-assisted suction oropharyngeal tube also includes a locking member. The proximal end of the locking member is oscillatingly connected to the outer wall of the mouthpiece and located on one side of the traction rope, so that the distal end of the locking member can oscillate relative to the proximal end of the locking member. The locking member extends across the traction rope so that the distal end of the locking member extends to the other side of the traction rope. The distal end of the locking member can be connected to the side wall of the mouthpiece to lock the traction rope between the locking member and the outer wall of the mouthpiece, or the distal end of the locking member can disengage from the outer wall of the mouthpiece so that the traction rope can slide back and forth within the first receiving groove.

7. The medical visual assisted suction oropharyngeal tube according to claim 1, characterized in that: The indicator solution is a colored liquid.

8. The medical visual assisted suction oropharyngeal tube according to claim 1, characterized in that: The medical visual assisted suction oropharyngeal tube further includes a second auxiliary positioning structure, which is located on the outer wall of the tube body; the second auxiliary positioning structure includes a second flexible liquid sac and a second indicator liquid tube; the second flexible liquid sac is located at the end of the pharyngeal insertion part and extends circumferentially along the outer wall of the pharyngeal insertion part, and the second flexible liquid sac is filled with an indicator solution; One end of the second indicator tube is connected to the second flexible liquid bladder, and the other end of the second indicator tube extends along the length of the pharyngeal insertion portion to the mouthpiece.

9. The medical visual assisted suction oropharyngeal tube according to claim 1, characterized in that: The pharyngeal insertion part is provided with an annular guide rail and an annular extension guide ring. The annular guide rail passes through the end of the side wall of the pharyngeal insertion part along the length direction of the pharyngeal insertion part and communicates with the receiving cavity. The annular extension guide ring slides with the annular guide rail so that the annular extension guide ring extends out of the end of the pharyngeal insertion part, and the inner side wall of the annular extension guide ring abuts against the outer wall of the suction tube.

10. The medical visual assisted suction oropharyngeal tube according to claim 9, characterized in that: The medical visual assisted suction oropharyngeal tube also includes multiple annular flexible skirts, which are disposed within the annular guide rail. One end of each annular flexible skirt is connected to the inner wall of the annular flexible skirt. The multiple annular flexible skirts are distributed at intervals along the length of the annular guide rail. The annular flexible skirts are located below the annular extended guide ring, and the multiple annular flexible skirts are used for damping cooperation with the annular extended guide ring.

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