CN212165911U - Protective screen suit structure for preventing aerosol scattering in tracheal intubation - Google Patents

Abstract

Prevent aerosol scattering protective screen suit structure in trachea cannula art belongs to medical instrument technical field. The disposable transparent barrier film is provided with a laryngoscope lens opening, a tracheal catheter opening, a sputum suction tube opening and a mask opening; the laryngoscope piece is fixed sealed to be inserted in the laryngoscope piece opening, and disposable transparent barrier membrane B face is equipped with the opening towards laryngoscope piece open-ended pocket, and endotracheal tube opening sets up on laryngoscope piece opening right side, and endotracheal tube is fixed sealed to be inserted in endotracheal tube opening, inhales the phlegm pipe opening and sets up near endotracheal tube opening, inhales the fixed sealed of phlegm pipe and inserts and inhale in the phlegm pipe opening, and the face guard opening sets up near laryngoscope piece opening, and the face guard fixed seal of ventilating is at the face guard opening part. The left side of the laryngoscope lens and the right side of the mask are respectively provided with a semi-surrounding negative pressure aspirator pipe, the negative pressure aspirator pipe is provided with a side hole, and the edge of the B surface of the barrier film is provided with a PET double-sided adhesive tape. The utility model is used for the protection of trachea cannula operation to the operator in emergency treatment first aid and clinical anesthesia and intensive care.

Description

Protective screen suit structure for preventing aerosol scattering in tracheal intubation

Technical Field

The utility model discloses medical instrument technical field, concretely relates to protective screen suit structure is disseminated to aerosol in trachea cannula art of preventing.

Background

Experimental research shows that the patient simulator can simulate cough in a horizontal position, the spreading distance can reach about 0.8 m, and even if a mask is used, the spreading distance can reach over 0.4 m during cough. According to different face masks and different operators during the positive pressure ventilation in induction period, although an anaesthetist can reduce the dispersion as much as possible through the over-hard basic work, the aerosol dispersion distance is about 0.6 m, and huge virus dispersion risks are brought to the tracheal intubation period (various ventilation face masks can cause the aerosol dispersion in the process of air bag positive pressure ventilation of the anaesthesia inducement period doctors at present, the operators are directly exposed in front of the respiratory tract of the patients in the tracheal intubation process, once the patients are choked and coughed, a large amount of aerosol is splashed to the face and the hands of the operators, and the infection probability of the operators is seriously increased). The study also found that negative pressure suction to the oral cavity reduced aerosol dispersion.

However, in the current method for preventing aerosol from spreading, the medical staff still wears goggles, disposable protective clothing, disposable protective masks and other modes to prevent virus infection and sterilize the whole indoor. There is currently no scientific method for the prevention of aerosol dissemination.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent aerosol spreading protective screen suit structure in trachea cannula art, the utility model discloses based on current face guard of ventilating, laryngoscope piece, endotracheal tube, inhale disposable consumptive materials such as phlegm pipe and negative pressure aspirator pipe, integrate the protective screen between operator and patient on with above-mentioned consumptive material, through all consumptive materials more than airtight, and carry out the negative pressure to the gas that contains latent aerosol and attract, the PET double faced adhesive tape that still sets up through disposable transparent protective screen membrane edge makes disposable transparent protective screen membrane and patient and sick bed keep relative seal, in order to reach the effect that isolated patient's respiratory track directly splashes aerosol, it is initiative protection to become passive protection, thereby furthest has protected the operator.

At present, a video visual laryngoscope is adopted in an endotracheal intubation, a disposable laryngoscope lens is adopted in a lens body, and a disposable endotracheal tube, a disposable barrier film, a disposable ventilation mask, a disposable sputum suction tube, a disposable PET double-sided adhesive and a disposable negative pressure aspirator catheter are used, so that the disposable endotracheal tube, the disposable sputum suction tube, the disposable PET double-sided adhesive and the disposable negative pressure aspirator catheter can be discarded after being used, and a guarantee is provided for the integral protective suit of people.

The utility model discloses just right integrated on a protective screen membrane use the face guard take place all consumptive materials for the operation that the aerosol was disseminated easily at trachea cannula in-process, protective screen membrane and each consumptive material sealing connection, thereby the isolated patient of furthest and operator of protective screen membrane and patient and sick bed etc. keep relative seal. The arrangement of the negative pressure aspirator conduit can remove the gas which potentially contains aerosol, which is the key point of the utility model.

Realize above-mentioned purpose, the utility model discloses the technical scheme who takes is:

an aerosol scattering prevention barrier suit structure in tracheal intubation comprises a laryngoscope lens, a sputum suction pipe, a tracheal catheter, a ventilation mask, a T-shaped pipe, a main catheter and two negative pressure suction apparatus catheters; the laryngoscope lens, the sputum suction pipe, the tracheal catheter, the ventilation mask, the T-shaped pipe, the main catheter and the two negative pressure suction apparatus catheters all belong to disposable consumables;

setting one side of the disposable transparent barrier film as an A side and the other side as a B side, wherein the disposable transparent barrier film is provided with a laryngoscope lens opening, a tracheal catheter opening, a sputum suction tube opening and a mask opening; the distance between the laryngoscope lens opening and the left side edge of the surface A of the disposable transparent barrier film is H1, H1 is 20-100cm, the laryngoscope lens opening is positioned on the horizontal central line of the disposable transparent barrier film, and the laryngoscope lens is fixedly, hermetically and inserted into the laryngoscope lens opening; the surface B of the disposable transparent barrier film is provided with a pocket with an opening facing the opening of the laryngoscope lens; the opening of the tracheal catheter is arranged on the right side of the opening of the laryngoscope lens, and the tracheal catheter is fixedly inserted into the opening of the tracheal catheter; the opening of the sputum suction pipe is arranged near the opening of the tracheal catheter, and the sputum suction pipe is fixedly and hermetically inserted into the opening of the sputum suction pipe; the mask opening is arranged near the laryngoscope lens opening and positioned outside the tracheal catheter opening, the ventilation mask is fixedly sealed at the mask opening, and the mask opening of the ventilation mask is positioned on one side of the B surface of the disposable transparent barrier film; the left side of the laryngoscope lens and the right side of the ventilation mask are respectively provided with a negative pressure aspirator catheter which is in a semi-surrounding shape, the two negative pressure aspirator catheters are bonded with the B surface of the disposable transparent barrier film, one ends of the two negative pressure aspirator catheters are open, the other ends of the two negative pressure aspirator catheters are closed, the open ends of the two negative pressure aspirator catheters are connected with a main catheter through a T-shaped tube, the main catheter is connected with a negative pressure suction device, and a plurality of side holes are formed in the two negative pressure aspirator catheters.

The utility model discloses beneficial effect for prior art is:

the prior passive protection only reduces the contact probability from the aspect of operators as much as possible and reduces the infection risk. Use the utility model discloses a prevent that aerosol spreads protective screen suit structure in trachea cannula art can initiatively seal relatively to infecting the person, makes all operations all go on under having the relative isolation condition, can stop aerosol at the cough by the high probability, and the face guard malleation is ventilated and is chocked the spreading when coughing, greatly reduced trachea cannula operator is infected by the probability of virus. The application of the negative pressure aspirator conduit can suck the generated aerosol away, thereby further reducing the risk of aerosol scattering. The whole structure is simple, the cost is low, the social benefit is obvious, the method has important significance in preventing and controlling respiratory tract spreading viruses such as novel coronavirus, Ebola virus and the like, and the method is urgently needed in clinical work. The method has important significance for emergency treatment in daily clinical work and protection of operators in clinical anesthesia and intensive care work.

Drawings

FIG. 1 is a schematic front view of a disposable transparent barrier film of the present invention;

fig. 2 is a schematic top view of the overall structure of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is an enlarged view of a portion of FIG. 2 at D;

FIG. 5 is a schematic view of the endotracheal tube assembled with the hollow bolt and nut;

FIG. 6 is an enlarged view of a portion of FIG. 2 at E;

FIG. 7 is a front view of the hollow bolt;

FIG. 8 is a left side view of FIG. 7;

FIG. 9 is a schematic structural view of a square-mouth clamp;

FIG. 10 is a side view of a square-mouth clamp;

FIG. 11 is a schematic structural diagram of a first annular pipe clamp, a second annular pipe clamp or a third annular pipe clamp;

FIG. 12 is a front view of a square nut;

FIG. 13 is a left side view of FIG. 12;

fig. 14 is a front view schematically showing the overall structure of the present invention.

The names and reference numbers of the components referred to in the above figures are as follows:

the negative pressure suction device comprises a laryngoscope blade 1, a sputum suction pipe 2, a tracheal catheter 3, a ventilation mask 4, a disposable transparent barrier film 5, a laryngoscope blade opening 6, a tracheal catheter opening 7, a sputum suction pipe opening 8, a mask opening 9, a pocket 10, a square opening clamp 11, a square opening base 12, a top cover 13, a hollow bolt 14, a nut 15, a first annular pipe clamp 16, a second annular pipe clamp 17, a third annular pipe clamp 18, a concave arc surface base 19, an arc-shaped upper cover 20, a T-shaped pipe 21, a main catheter 22, a negative pressure suction device catheter 23 and a side hole 24.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the embodiments and the accompanying drawings, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the protection scope of the present invention.

The first embodiment is as follows: as shown in fig. 1, fig. 2 and fig. 14, the present embodiment discloses a protective barrier suit structure for preventing aerosol spreading in endotracheal intubation, which comprises a laryngoscope lens 1, a sputum suction tube 2, an endotracheal tube 3, a ventilation mask 4, a T-shaped tube 21, a main catheter 22 and two negative pressure aspirator catheters 23; the laryngoscope lens 1, the sputum suction pipe 2, the tracheal catheter 3, the ventilation mask 4, the T-shaped pipe 21, the main catheter 22 and the two negative pressure suction apparatus catheters 23 all belong to disposable consumables;

setting one surface of the disposable transparent barrier film 5 as an A surface and the other surface as a B surface, wherein the disposable transparent barrier film 5 is provided with a laryngoscope lens opening 6, a tracheal catheter opening 7, a sputum suction tube opening 8 and a face mask opening 9; the distance between the laryngoscope lens opening 6 and the left side edge of the A surface of the disposable transparent barrier film 5 is H1, H1 is 20-100cm, the laryngoscope lens opening 6 is positioned on the horizontal central line of the disposable transparent barrier film 5, and the laryngoscope lens 1 is fixedly and hermetically inserted into the laryngoscope lens opening 6 (the distance between one end of the laryngoscope lens 1 connected with a visible laryngoscope and the A surface of the disposable transparent barrier film 5 is H2, and H2 is 1-10 cm); the B surface of the disposable transparent barrier film 5 is provided with a pocket 10 with an opening facing to the opening 6 of the laryngoscope lens (the distance from the opening edge of the pocket 10 to the center of the opening 6 of the laryngoscope lens is H3, H3-5-20 cm); the tracheal catheter opening 7 is arranged on the right side of the laryngoscope lens opening 6, and the tracheal catheter 3 is fixedly inserted into the tracheal catheter opening 7; the sputum suction pipe opening 8 is arranged near the tracheal catheter opening 7, and the sputum suction pipe 2 is fixedly and hermetically inserted into the sputum suction pipe opening 8 (the distance between the front end of the sputum suction pipe 2 and the surface B of the disposable transparent barrier film 5 is H4, and H4 is 10-40 cm); the mask opening 9 is arranged near the laryngoscope lens opening 6 and is positioned outside the tracheal catheter opening 7, the ventilation mask 4 is fixedly sealed at the mask opening 9, and the mask opening of the ventilation mask 4 is positioned on one side of the surface B of the disposable transparent barrier film 5; the left side of the laryngoscope lens 1 and the right side of the ventilation mask 4 are respectively provided with one negative pressure suction device catheter 23 which is in a semi-surrounding shape, the two negative pressure suction device catheters 23 are bonded with the surface of the disposable transparent barrier film 5B, one end of each of the two negative pressure suction device catheters 23 is open, the other end of each of the two negative pressure suction device catheters is closed, the open ends of the two negative pressure suction device catheters 23 are connected with a main catheter 22 through a T-shaped tube 21, the main catheter 22 is connected with a negative pressure suction device, and a plurality of side holes 24 are formed in the two negative pressure.

The tracheal catheter 3 is a common type, special-shaped, single-cavity bronchial cannula, a head controllable tracheal cannula, a tracheal cannula with a sputum suction cavity (reinforced type or common type), a tracheal cannula with a dental pad or a reinforced tracheal catheter (double-cuff or olive bag), and has the model of No. 3-10 or No. 28-41 of a double-cavity bronchial cannula.

The specification of the sputum suction pipe 2 is F8-F16.

The ventilation mask 4 is a mask with an air cushion, and the model is 0# -6 #; or silica gel mask No. 0-4.

The length of the laryngoscope lens 1 is 4.5-16.1cm, and the width is 0.8-1.8 cm. The laryngoscope blade 1 is a common type, an integrated type, a channel type or a metal type (different types are distinguished according to different types of the laryngoscope blade 1).

The pocket 10 is located to the left of the laryngoscope blade opening 6. The pocket 10 is used for accommodating the laryngoscope blade 1 which is withdrawn after intubation (preferably, the length center line of the pocket 10 is coincident with the horizontal center line of the disposable transparent barrier film 5), and the material of the pocket 10 is the same as that of the disposable transparent barrier film 5.

The second embodiment is as follows: as shown in fig. 1 and fig. 2, in this embodiment, a first embodiment is further described, the material of the disposable transparent barrier film 5 is medical PVC or PE, or food grade PVC or PE, and the thickness of the disposable transparent barrier film 5 is 0.01-0.3 cm.

The third concrete implementation mode: as shown in fig. 2, fig. 3, fig. 9 and fig. 10, this embodiment further illustrates a first embodiment, wherein the laryngoscope blade 1 is provided with a square-mouth clamp 11 tightly fixed on each side of the disposable transparent barrier film 5, and the two square-mouth clamps 11 tightly clamp the disposable transparent barrier film 5 in the middle.

Square mouth presss from both sides 11 including square mouth base 12 and top cap 13, top cap 13 one end and square mouth base 12 upper end one side flexonics, the top cap 13 other end and square mouth base 12 upper end opposite side joint.

The square mouth of the square mouth clamp 11 is L, L is 1.2cm, the height of the square mouth is h, h is 1.2cm, the width of the square mouth is W, and W is 0.2-1 cm.

The fourth concrete implementation mode: as shown in fig. 1, fig. 2, fig. 5, fig. 7, fig. 8 and fig. 11, this embodiment further illustrates a first embodiment, a hollow bolt 14 is tightly inserted into the endotracheal tube opening 7, a head end of the hollow bolt 14 is disposed on one side of the a surface of the disposable transparent barrier membrane 5, the endotracheal tube 3 is tightly inserted into the hollow bolt 14, a nut 15 is screwed on the hollow bolt 14, the disposable transparent barrier membrane 5 is tightly clamped between the nut 15 and the head end of the hollow bolt 14, the endotracheal tube 3 is tightly fixed in a first annular tube clamp 16, and the first annular tube clamp 16 is disposed at the head end of the hollow bolt 14.

Preferably, the nut 15 is a square nut. The diameter of the inner ring of the first annular pipe clamp 16 is matched with the diameter of the outer wall of the tracheal tube 3.

The fifth concrete implementation mode: as shown in fig. 2, fig. 4 and fig. 11, this embodiment further illustrates the first embodiment, wherein two annular tube clamps 17 are tightly fixed to the sputum aspirator 2 at two sides of the disposable transparent barrier film 5, and the two annular tube clamps 17 tightly clamp the disposable transparent barrier film 5 in the middle.

The diameter of the inner ring of the second annular pipe clamp 17 is matched with the diameter of the outer wall of the sputum suction pipe 2.

The sixth specific implementation mode: as shown in fig. 2, 6 and 11, this embodiment further illustrates a first embodiment, wherein the rear end of the ventilation mask 4 is tightly fixed in an annular tube clamp three 18, and the annular tube clamp three 18 fixes the disposable transparent barrier film 5 to the root of the tube interface (the ventilation mask shell and the tube connecting portion) of the ventilation mask 4.

The diameter of the inner ring of the annular tube clamp three 18 matches the diameter of the outer wall of the rear end of the ventilation mask 4.

The annular pipe clamp I16, the annular pipe clamp II 17 and the annular pipe clamp III 18 are identical in structure and respectively comprise an inner concave arc surface base 19 and an arc-shaped upper cover 20, one end of the arc-shaped upper cover 20 is flexibly connected with one side of the upper end of the inner concave arc surface base 19, the other end of the arc-shaped upper cover 20 is clamped with the other side of the upper end of the inner concave arc surface base 19, and an annular cavity is formed between the inner concave arc surface base 19 and the arc-shaped upper cover 20.

The seventh embodiment: as shown in fig. 1 and 2, this embodiment further illustrates the first embodiment, wherein the disposable transparent barrier film 5 is rectangular or circular, the rectangular disposable transparent barrier film 5 has a length of 50 to 350cm and a width of 40 to 200cm, and the circular disposable transparent barrier film 5 has a diameter of 50 to 350 cm.

The specific implementation mode is eight: as shown in fig. 1, this embodiment is further described with respect to the first embodiment, the endotracheal tube opening 7 is disposed on the horizontal centerline of the laryngoscope blade opening 6, the central distance between the endotracheal tube opening 7 and the laryngoscope blade opening 6 is H5, and H5 is 10-50 cm; or taking any point in the area 180 degrees at the right side of the laryngoscope blade opening 6 and 65-50cm away from the laryngoscope blade opening 6 as the center of the opening 7 of the endotracheal tube.

The specific implementation method nine: as shown in fig. 1, the present embodiment further illustrates the first embodiment, wherein the center of the sputum aspirator opening 8 is located at any point within a radius of 0.5-10cm with the endotracheal tube opening 7 as the center; the mask opening 9 is arranged at any position around the laryngoscope blade opening 6 with the diameter in the area of 10-100 cm.

The detailed implementation mode is ten: as shown in fig. 14, this embodiment is a further description of the first embodiment, and the edge of the B-side of the disposable transparent barrier film 5 is provided with a PET double-sided tape, so that the disposable transparent barrier film 5 is sealed relative to the patient and the bed.

The utility model discloses a use is:

the face 5B of the disposable transparent barrier film is firstly placed on the face of a patient, and the disposable mask is used for connecting the artificial nose and further connecting the loop. After the quick sequential induction dosing, the positive pressure ventilation is carried out, the time meeting the cannula condition is reached, and the whole sleeving structure moves to the oral cavity along with the laryngoscope lens. The tracheal tube can be guided to be placed in after the laryngoscope lens and the video laryngoscope are connected, the lens end of the video laryngoscope is placed in the laryngoscope lens, the endoscope is arranged to see and pick up the epiglottis to expose the glottis, then the tracheal tube is moved to the position near the oral cavity, the tube is placed in the trachea, the trachea is inflated, the tracheal tube and the end opening of the respirator are temporarily sealed before the tracheal tube core is pulled out, the loop of the respirator is connected in the shortest time after the tracheal tube is pulled out, the breathing sound is auscultated, the condition of end-expiratory carbon dioxide is observed, and the intubation is completed after the tracheal tube is confirmed in the. Stabilizing for 1 min, and performing other operations after the aerosol falls and settles, such as fixing endotracheal tube with bite-block adhesive tape. The method of absolutely closing the headgear cannot be used because once uncontrollable conditions, such as reflux and aspiration, occur, rapid treatment is required.

Claims (10)

1. An aerosol spreading prevention barrier suit structure in tracheal intubation comprises a laryngoscope lens (1), a sputum suction tube (2), a tracheal catheter (3), a ventilation mask (4), a T-shaped tube (21), a main catheter (22) and two negative pressure aspirator catheters (23); the laryngoscope blade (1), the sputum suction tube (2), the tracheal catheter (3), the ventilation mask (4), the T-shaped tube (21), the main catheter (22) and the two negative pressure aspirator catheters (23) all belong to disposable consumables; the method is characterized in that: the protective screen suit structure for preventing aerosol from spreading in the tracheal intubation also comprises a disposable transparent protective screen film (5);

setting one surface of the disposable transparent barrier film (5) as an A surface and the other surface as a B surface, wherein the disposable transparent barrier film (5) is provided with a laryngoscope lens opening (6), a tracheal tube opening (7), a sputum suction tube opening (8) and a face mask opening (9); the distance between the laryngoscope lens opening (6) and the left side edge of the A surface of the disposable transparent barrier film (5) is H1, H1 is 20-100cm, the laryngoscope lens opening (6) is positioned on the horizontal central line of the disposable transparent barrier film (5), and the laryngoscope lens (1) is fixedly and hermetically inserted into the laryngoscope lens opening (6); the B surface of the disposable transparent barrier film (5) is provided with a pocket (10) with an opening facing the opening (6) of the laryngoscope lens; the tracheal catheter opening (7) is arranged on the right side of the laryngoscope lens opening (6), and the tracheal catheter (3) is fixedly inserted into the tracheal catheter opening (7); the sputum suction pipe opening (8) is arranged near the tracheal catheter opening (7), and the sputum suction pipe (2) is fixedly and hermetically inserted into the sputum suction pipe opening (8); the mask opening (9) is arranged near the laryngoscope lens opening (6) and is positioned at the outer side of the tracheal catheter opening (7), the ventilation mask (4) is fixedly sealed at the mask opening (9), and the mask opening of the ventilation mask (4) is positioned at one side of the B surface of the disposable transparent barrier film (5); laryngoscope piece (1) left side and face guard (4) right side of ventilating respectively are equipped with one and are half surrounding shape negative pressure suction ware pipe (23), two negative pressure suction ware pipes (23) all bond with disposable transparent barrier membrane (5) B face, and two negative pressure suction ware pipe (23) one end openings, the other end are sealed, and two negative pressure suction ware pipe (23) open ends are passed through T type pipe (21) and are connected with main duct (22), main duct (22) are connected with the negative pressure suction device, are equipped with several side opening (24) on two negative pressure suction ware pipes (23).

2. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the material of the disposable transparent barrier film (5) is medical PVC or PE, or food grade PVC or PE, and the thickness of the disposable transparent barrier film (5) is 0.01-0.3 cm.

3. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the laryngoscope blade (1) is positioned at two sides of the disposable transparent barrier film (5) and is respectively and tightly fixed with a square-mouth clamp (11), and the disposable transparent barrier film (5) is tightly clamped in the middle by the two square-mouth clamps (11).

4. The structure of claim 1, wherein the barrier is a set of one or more of the following components: closely insert hollow bolt (14) in endotracheal tube opening (7), disposable transparent barrier membrane (5) A face one side is placed in to the head end of hollow bolt (14), endotracheal tube (3) closely insert in hollow bolt (14), and it has nut (15) to close on hollow bolt (14) soon, the head end of nut (15) and hollow bolt (14) is closely pressed from both sides disposable transparent barrier membrane (5) in the centre, and endotracheal tube (3) are closely fixed in annular pipe clamp (16), annular pipe clamp (16) set up the head end at hollow bolt (14).

5. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the sputum suction pipe (2) is positioned at two sides of the disposable transparent barrier film (5) and is respectively and tightly fixed with a second annular pipe clamp (17), and the disposable transparent barrier film (5) is tightly clamped in the middle by the second annular pipe clamps (17).

6. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the tail end of the ventilation mask (4) is tightly fixed in an annular pipe clamp III (18), and the disposable transparent barrier film (5) is fixed at the root part of the catheter interface of the ventilation mask (4) by the annular pipe clamp III (18).

7. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the shape of the disposable transparent barrier film (5) is rectangular or circular, the length of the rectangular disposable transparent barrier film (5) is 50-350cm, the width of the rectangular disposable transparent barrier film is 40-200cm, and the diameter of the circular disposable transparent barrier film (5) is 50-350 cm.

8. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the tracheal tube opening (7) is arranged on the horizontal central line of the laryngoscope lens opening (6), the central distance between the tracheal tube opening (7) and the laryngoscope lens opening (6) is H5, and H5 is 10-50 cm; or taking any point in the area 180 degrees at the right side of the laryngoscope lens opening (6) and 65-50cm away from the laryngoscope lens opening (6) as the center of the opening (7) of the tracheal catheter.

9. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the center of the sputum suction pipe opening (8) is arranged at any point within a radius of 0.5-10cm by taking the tracheal catheter opening (7) as the center of a circle; the mask opening (9) is arranged at any position of the circumference of the laryngoscope lens opening (6) with the diameter of 10-100 cm.

10. The structure of claim 1, wherein the barrier is a set of one or more of the following components: the edge of the B side of the disposable transparent barrier film (5) is provided with a PET double-sided adhesive tape.

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