A laryngeal mask airway fixation device

Abstract

The present application relates to the technical fields of respiratory medical apparatus, and discloses a displacement-preventing laryngeal mask fixing device, which comprises a lower pressing seat, a pressing cover of the patient's oral cavity; an upper pressing plate, which is matched with the lower pressing seat, covers the lower pressing seat and can be detached relative to the lower pressing seat; a restraint part, which is fixed at the two sides of the lower pressing seat, is sleeved on the patient's head and forms an annular surrounding fixation with the lower pressing seat; and two fixers, which are provided with adjusting grooves for the sliding of the fixers. The structure adopted by the present application allows the restraint part to be actively adapted by adjusting the position of the fixer after being fixed, and the position of the laryngeal mask which is inserted and assembled is fixed by the fixer pair, so that the position offset of the fixer pair laryngeal mask clamping after being fixed is greatly reduced, and the insertion stability of the laryngeal mask is improved.

Description

Technical Field

[0001] This invention relates to the field of respiratory medical device technology, and in particular to an anti-displacement laryngeal mask fixation device. Background Technology

[0002] A laryngeal mask airway is a supraglottic airway device that sits between a face mask and an endotracheal tube. It is used to quickly establish an artificial airway and ensure ventilation and oxygenation. The laryngeal mask airway is fixed to the pharynx by the friction of the cuff alone, without tracheal anchoring. Swallowing, coughing, head and neck turning, and changes in surgical position can all cause the laryngeal mask airway to move upward, rotate, or leak air, resulting in insufficient ventilation and hypoxia.

[0003] There are many related fixation structures in the prior art, such as those published in (KR102591398B1), (EP2015814B1), and (CN104039379B), which include a restraint strap structure and a locking structure that is fitted over the mouth to fix the position of the medical tube inserted into the body. In use, the restraint strap is first fixed and then the medical tube is clamped. If the restraint strap is worn off, the clamping position of the medical tube will shift. Such a structure is very unstable when fixing the laryngeal mask. Clinical practice has revealed that the mouthpiece is misaligned because the restraint strap is difficult to put on accurately and centered in one go during fixation. This results in a slight misalignment between the laryngeal mask and the trachea after fixation. When the misalignment is large, it can be corrected by adjusting the position of the restraint strap. However, this procedure relies heavily on subjective experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an anti-displacement laryngeal mask fixing device to overcome the problems mentioned above.

[0005] The technical problem solved by this invention is achieved through the following technical solution: A laryngeal mask airway fixation device for preventing displacement, comprising: The pressure seat is placed on the patient's face and mouth area; The upper pressure plate cooperates with the lower pressure seat, covers the lower pressure seat, and can be detached from the lower pressure seat. The restraint part is fixed at both ends to the lower pressure seat, and is fitted onto the patient's head and forms a ring around the lower pressure seat for fixation; There are two fasteners. The upper pressure plate and the lower pressure seat are provided with adjustment grooves for the fixing device to slide. After the upper pressure plate and the lower pressure seat are assembled, an adjustment gap is formed. The upper pressure plate and the lower pressure seat have two states of cooperation: a gap state and a locked state. In the gap state, the fixing device can slide and adjust its position in the adjustment groove. In the locked state, the fixing device is clamped by the upper pressure plate and the lower pressure seat and cannot move. The locking device includes a threaded post fixed on the lower pressure seat and a knob threadedly connected to the threaded post. The threaded post passes through the upper pressure plate and is threadedly connected to the knob.

[0006] In one embodiment, the restraint part consists of two restraint straps, and the movable ends of the restraint straps are fixed with Velcro that can be connected to each other. In use, the restraint part is fixed to the patient's head by sticking the two Velcro straps together.

[0007] In one embodiment, the restraint part is an elastic band, the two ends of which are fixed to both sides of the pressure seat. When in use, the elastic band is pulled open and put on the patient's head, and then the pressure seat is pressed on the patient's mouth.

[0008] In one embodiment, the upper end face of the lower pressure seat is provided with an upwardly protruding outer flange and an inner flange, the middle part of the lower pressure seat has a second square clearance opening, and the upper end face of the inner flange is lower than the upper end face of the outer flange, the inner flange and the outer flange together form the adjustment groove.

[0009] In one embodiment, the fixture includes a limiting plate, a semi-circular clamp, and a locking plate. The semi-circular clamp and the locking plate are respectively fixed to both ends of the limiting plate. The lower end face of the locking plate abuts against the upper end face of the adjusting groove, and the lower end face of the limiting plate abuts against the upper end face of the inner flange. In the gap state, the lower end face of the upper pressure plate does not contact the fixture.

[0010] In one embodiment, the upper pressure plate is provided with a first square clearance opening aligned with the second square clearance opening, and a circular clearance opening aligned with the threaded post. The threaded post passes through the circular clearance opening and is threadedly connected to the knob.

[0011] In one embodiment, the semicircular clips are semicircular in shape, and two semicircular clips are closed at the tail end of the laryngeal mask tube to hold it. The inner circle size of the semicircular clips should be such that when the semicircular clips are closed, they form an interference fit with the laryngeal mask tube, thus fixing the laryngeal mask after the semicircular clips are closed.

[0012] In one embodiment, a rubber flange is fixedly provided on the inner wall surface of the semi-circular clamp. The shape of the rubber flange can be dot-shaped or strip-shaped. The rubber flange has a higher coefficient of friction after contacting the laryngeal mask tube, thereby improving the stability of clamping.

[0013] In one embodiment, a rod and a hole are fixedly provided on the mating end face of the semicircular clamp. When the semicircular clamp is closed, the rod is inserted into the hole on the opposite side to ensure that the upper and lower end faces of the two semicircular clamps are flush. When the mating end faces of the semicircular clamps are pressed together, the knob is tightened, and the upper pressure plate and the lower pressure seat quickly lock the fixture.

[0014] In one embodiment, stabilizing rods are fixedly provided at the four corners of the lower end face of the upper pressure plate, and stabilizing holes for inserting the stabilizing rods are fixedly provided at the four corners of the adjustment groove.

[0015] The advantages and positive effects of this invention are as follows: Compared with the existing structure, the structure adopted by this device allows the restraint part to actively adapt by adjusting the position of the fixator after it is fixed, and quickly fixes the position of the laryngeal mask and the inserted laryngeal mask by the fixator. In this way, the offset between the fixed position and the position when the laryngeal mask is inserted after the fixator clamps the laryngeal mask is greatly reduced, which improves the insertion stability of the laryngeal mask. Compared with the prior art, it can reduce the fixed position offset caused by the installation offset of the laryngeal mask fixator, and improve the convenience of use and the fixing efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 yes Figure 1 Another perspective structural diagram; Figure 3 This is a schematic diagram of another embodiment of the present invention; Figure 4 yes Figure 3 Exploded structural diagram of the embodiment; Figure 5 yes Figure 4 Enlarged structural schematic diagram of the central fixer 15; Figure 6 This is a schematic diagram of one fixed-position structure of the present invention; Figure 7 This is a schematic diagram of another fixed-position structure of the present invention.

[0018] The markings in the attached diagram are described as follows: 10. Upper pressure plate; 11. Knob; 12. Lower pressure seat; 13. Binding part; 14. Velcro; 15. Fixing device; 16. Limiting plate; 17. Semi-circular clip; 18. Rubber flange; 19. Threaded post; 20. Outer flange; 21. Inner flange; 22. Adjusting gap; 23. First square clearance opening; 24. Circular clearance opening; 26. Second square clearance opening; 27. Insert rod; 28. Insertion hole; 29. ​​Adjustment groove; 30. Locking plate; 31. Stabilizing insert rod; 32. Stabilizing insertion hole. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention. The embodiments of the invention are further described in detail below with reference to the accompanying drawings: like Figure 1-7 As shown, the anti-displacement laryngeal mask fixing device of the present invention includes: The lower pressure seat 12 is placed on the patient's face and mouth area; The upper pressure plate 10 cooperates with the lower pressure seat 12, covers the lower pressure seat 12, and can be detached from the lower pressure seat 12. The restraint part 13 is fixed at both ends to the lower pressure seat 12, and is fitted onto the patient's head and forms a ring around the lower pressure seat 12 for fixation. Fixture 15, two are provided; The upper pressure plate 10 and the lower pressure seat 12 are provided with adjustment grooves 29 for the fixing device 15 to slide. After the upper pressure plate 10 and the lower pressure seat 12 are assembled, an adjustment gap 22 is formed. The upper pressure plate 10 and the lower pressure seat 12 have two states of cooperation: a gap state and a locked state. In the gap state, the fixing device 15 can slide and adjust its position in the adjustment groove 29. In the locked state, the fixing device 15 is clamped by the upper pressure plate 10 and the lower pressure seat 12 and cannot move. The locking device includes a threaded post 19 fixed on the lower pressure seat 12 and a knob 11 threadedly connected to the threaded post 19. The threaded post 19 passes through the upper pressure plate 10 and is threadedly connected to the knob 11. Specifically, in the initial state, the knob 11 is not tightened with the threaded post 19, and the upper pressure plate 10 and the lower pressure seat 12 are in a gap state. The retainer 15 can be adjusted in position, thereby moving and approaching the laryngeal mask tube and clamping it relative to it. After clamping the retainer 15 with the laryngeal mask tube, the knob 11 is tightened to quickly switch the upper pressure plate 10 and the lower pressure seat 12 to the locking state. During the fixing process of this device, the original position of the laryngeal mask tube will not be changed due to the fixing, which is conducive to maintaining the stable fit of the laryngeal mask.

[0020] In one embodiment, such as Figure 1 The binding part 13 consists of two binding straps, and the movable ends of the binding straps are fixed with Velcro 14 that can be connected to each other. In use, the binding part 13 is fixed to the patient's head by sticking the two Velcro 14 together.

[0021] In one embodiment, such as Figure 3 The restraint part 13 is an elastic band, and the two ends of the elastic band are fixed to the two sides of the pressure seat 12. When in use, the elastic band is pulled open and put on the patient's head, and then the pressure seat 12 is pressed on the patient's mouth. In addition, the restraint part 13 can also adopt other adjustable band structures commonly used in the prior art.

[0022] In one embodiment, the upper end face of the lower pressure seat 12 is provided with an upwardly protruding outer flange 20 and an inner flange 21. The lower pressure seat 12 has a second square clearance opening 26 in the middle, and the upper end face of the inner flange 21 is lower than the upper end face of the outer flange 20. The inner flange 21 and the outer flange 20 together form the adjustment groove 29.

[0023] In one embodiment, the fixture 15 includes a limiting plate 16, a semi-circular clamp 17, and a locking plate 30. The semi-circular clamp 17 and the locking plate 30 are respectively fixed to both ends of the limiting plate 16. The lower end face of the locking plate 30 abuts against the upper end face of the adjusting groove 29, and the lower end face of the limiting plate 16 abuts against the upper end face of the inner flange 21. In the gap state, the lower end face of the upper pressure plate 10 does not contact the fixture 15, so the fixture 15 has a movable gap for sliding adjustment. When the knob 11 is tightened, it switches to the locking state, and the lower end face of the upper pressure plate 10 presses tightly against the upper end faces of the limiting plate 16 and the locking plate 30 to restrict the movement of the fixture 15.

[0024] In one embodiment, the upper pressure plate 10 is provided with a first square clearance 23 aligned with the second square clearance 26, and a circular clearance 24 aligned with the threaded post 19. The threaded post 19 passes through the circular clearance 24 and is threadedly connected to the knob 11.

[0025] In one embodiment, the semicircular clip 17 is semicircular in shape, and the two semicircular clips 17 are closed at the tail of the laryngeal mask tube to clamp it. The inner circle size of the semicircular clip 17 should be such that when the semicircular clip 17 is closed, it forms an interference fit with the laryngeal mask tube, so that the laryngeal mask is fixed after the semicircular clip 17 is closed.

[0026] In one embodiment, a rubber flange 18 is fixedly provided on the inner wall surface of the semicircular clamp 17. The shape of the rubber flange 18 can be dot-shaped or strip-shaped. The rubber flange 18 has a higher coefficient of friction after contacting the laryngeal mask tube, thereby improving the stability of clamping.

[0027] In one embodiment, to improve the alignment of the two semicircular clips 17, a rod 27 and a hole 28 are fixedly provided on the mating end face of the semicircular clips 17. When the semicircular clips 17 are closed, the rod 27 is inserted into the hole 28 on the opposite side to ensure that the upper and lower end faces of the two semicircular clips 17 are flush. When the mating end faces of the semicircular clips 17 are pressed together, the knob 11 is tightened, and the upper pressure plate 10 and the lower pressure seat 12 quickly lock the retainer 15.

[0028] In one embodiment, stabilizing inserts 31 are fixedly provided at the four corners of the lower end face of the upper pressure plate 10, and stabilizing holes 32 for inserting the stabilizing inserts 31 are fixedly provided at the four corners of the adjusting groove 29. When the upper pressure plate 10 and the lower pressure seat 12 are in a gap state or a locked state, the stabilizing inserts 31 are inserted into the stabilizing holes 32 to ensure that the upper pressure plate 10 will not rotate or shift.

[0029] In practice, the restraint part 13 is fixed to the patient's head. The second square clearance opening 26 is pre-aligned with the outer periphery of the patient's mouth. After the restraint part 13 is fixed, the fixator 15 is moved close to the laryngeal mask tube and the laryngeal mask tube is clamped with the semi-circular clamp 17. When the mating end face of the semi-circular clamp 17 contacts, the laryngeal mask tube is clamped with interference. After the insertion rod 27 is inserted into the insertion hole 28, the two knobs 11 are quickly tightened. In this way, the position of the laryngeal mask will not shift significantly from the time it is inserted into the predetermined position until it is fixed.

[0030] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A laryngeal mask airway fixation device for preventing displacement, characterized in that: include: The lower pressure seat (12) is placed on the patient's face and mouth area; The upper pressure plate (10) cooperates with the lower pressure seat (12), covers the lower pressure seat (12), and can be disassembled relative to the lower pressure seat (12); The restraint part (13) is fixed at both ends to the lower pressure seat (12), and is fitted onto the patient's head and forms a ring around the lower pressure seat (12) for fixation; Fixture (15), two are provided; The upper pressure plate (10) and the lower pressure seat (12) are provided with adjustment grooves (29) for the fixing device (15) to slide. After the upper pressure plate (10) and the lower pressure seat (12) are assembled, an adjustment gap (22) is formed. The upper pressure plate (10) and the lower pressure seat (12) have two states of cooperation: a gap state and a locked state. In the gap state, the fixing device (15) can slide and adjust its position in the adjustment groove (29). In the locked state, the fixing device (15) is clamped by the upper pressure plate (10) and the lower pressure seat (12) and cannot move. The locking device includes a threaded post (19) fixed on the lower pressure seat (12) and a knob (11) threadedly connected to the threaded post (19). The threaded post (19) passes through the upper pressure plate (10) and is threadedly connected to the knob (11).

2. The anti-displacement laryngeal mask fixing device according to claim 1, characterized in that: The binding part (13) consists of two binding straps, and the movable ends of the binding straps are fixed with Velcro (14) that can be connected to each other. In use, the binding part (13) is fixed to the patient's head by sticking the two Velcro (14) together.

3. The anti-displacement laryngeal mask fixing device according to claim 1, characterized in that: The restraint part (13) is an elastic band. The two ends of the elastic band are fixed to the two sides of the pressure seat (12). When in use, the elastic band is pulled open and put on the patient's head, and then the pressure seat (12) is pressed on the patient's mouth.

4. The anti-displacement laryngeal mask fixing device according to claim 1, characterized in that: The upper end face of the lower pressure seat (12) is provided with an upwardly protruding outer flange (20) and an inner flange (21). The middle part of the lower pressure seat (12) has a second square clearance opening (26), and the upper end face of the inner flange (21) is lower than the upper end face of the outer flange (20). The inner flange (21) and the outer flange (20) together form the adjustment groove (29).

5. The anti-displacement laryngeal mask fixing device according to claim 4, characterized in that: The fixture (15) includes a limiting plate (16), a semi-circular clamp (17), and a locking plate (30). The semi-circular clamp (17) and the locking plate (30) are respectively fixed at both ends of the limiting plate (16). The lower end face of the locking plate (30) abuts against the upper end face of the adjusting groove (29), and the lower end face of the limiting plate (16) abuts against the upper end face of the inner flange (21). In the gap state, the lower end face of the upper pressure plate (10) does not contact the fixture (15).

6. The anti-displacement laryngeal mask fixing device according to claim 5, characterized in that: The upper pressure plate (10) is provided with a first square clearance opening (23) aligned with the second square clearance opening (26) and a circular clearance opening (24) aligned with the threaded post (19). The threaded post (19) passes through the circular clearance opening (24) and is threadedly connected to the knob (11).

7. The anti-displacement laryngeal mask fixing device according to claim 6, characterized in that: The semicircular clip (17) is semicircular in shape. Two semicircular clips (17) are closed together at the tail of the laryngeal mask tube to hold it. The inner circle size of the semicircular clip (17) should meet the requirement that when the semicircular clip (17) is closed, it forms an interference fit with the laryngeal mask tube, so that the laryngeal mask is fixed after the semicircular clip (17) is closed.

8. The anti-displacement laryngeal mask fixing device according to claim 7, characterized in that: A rubber flange (18) is fixedly provided on the inner wall surface of the semicircular clamp (17). The shape of the rubber flange (18) can be dot-shaped or strip-shaped. The rubber flange (18) has a higher coefficient of friction after contacting the laryngeal mask tube, which improves the stability of clamping.

9. The anti-displacement laryngeal mask fixing device according to claim 8, characterized in that: A rod (27) and a hole (28) are fixedly provided on the joint end face of the semicircular clamp (17). When the semicircular clamp (17) is closed, the rod (27) is inserted into the hole (28) on the opposite side to ensure that the upper and lower end faces of the two semicircular clamps (17) are flush. When the mating end faces of the semicircular clamps (17) are pressed together, the knob (11) is tightened, and the upper pressure plate (10) and the lower pressure seat (12) quickly lock the fixing device (15).

10. The anti-displacement laryngeal mask fixing device according to claim 9, characterized in that: The upper pressure plate (10) has four corners of a stabilizing insert rod (31) fixedly provided, and the four corners of the adjustment groove (29) have stabilizing holes (32) for inserting the stabilizing insert rod (31).

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