Quick-release oxygen mask

Abstract

The present application provides a quick-removing oxygen mask, which comprises a mask body, the mask body comprises a nose part at the bridge of the nose and a jaw part at the chin, and the oxygen mask further comprises a suspension structure, the suspension structure comprises a flat support body and a plurality of elastic extension legs, one end of each of the extension legs is fixedly formed on different positions of the side end of the support body and the other end of each of the extension legs extends to the back side, and one of the extension legs is fixedly connected with the inner surface of the nose part, and the length of each of the extension legs satisfies the condition that the support body can be suspended at the vertex of the forehead when being attached to the face. According to the present application, the oxygen mask can be quickly removed in the case of lying on the side, is not easy to fall off and has good human comfort.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, and in particular relates to an oxygen mask that can be quickly removed during surgical procedures. Background Technology

[0002] Oxygen masks are widely used in medical surgeries and other procedures, and their designs have become increasingly sophisticated, with lightweight and convenient models being the mainstream. However, a practical issue remains that is often understood by medical personnel but not by designers. Patients may experience spurting blood during surgery. Often, to ensure a secure fit, the oxygen mask is tied behind the head or hung over the ears with a rope or strap. However, a large amount of blood spurting can cause suffocation in a very short time, creating an emergency where medical personnel cannot remove the rope or strap in time. Therefore, in practice, medical personnel sometimes simply fasten the mask to the patient's face, as a complete closure of the oxygen mask is not required.

[0003] However, some surgeries require patients to lie on their side. In this case, the mask cannot be directly fastened to the face and can only be secured with ropes or straps. Removing the ropes or straps when the patient is lying on their side is more time-consuming. Therefore, there is a need in the field for a mask that can be quickly removed even when the patient is lying on their side. Summary of the Invention

[0004] This invention was developed in view of the above problems, and its purpose is to provide an oxygen mask that can be quickly removed.

[0005] The present invention provides a quick-release oxygen mask, comprising a mask body, the mask body including a nose portion covering the bridge of the nose and a jaw portion hooked onto the chin, wherein the oxygen mask further includes a suspension structure, the suspension structure including a flat support body and a plurality of elastic extension legs with one end fixedly formed at different positions on the side end of the support body and the other end extending toward the back, wherein one extension leg is fixedly connected to the inner surface of the nose portion, and the length of the plurality of extension legs is such that when it is attached to the face, the support body can be suspended above the forehead.

[0006] Preferably, the projections of the rebound directions of the plurality of extended legs onto the plane of the support body intersect at a single point.

[0007] Preferably, the system includes three extendable legs, and the projection of the rebound direction of any one extendable leg onto the plane of the support body lies between the angles formed by the lines connecting one end of that extendable leg to the ends of the other two extendable legs. More preferably, the projections of the rebound directions of the three extendable legs onto the plane of the support body intersect at a single point.

[0008] More preferably, the support body is elliptical, and one end of the extension leg, which is fixedly connected to the inner surface of the nose, is fixedly formed at the lower end of the short diameter of the support body, while the other two extension legs are fixedly formed at the side ends of the upper half of the support body and are arranged symmetrically from left to right.

[0009] Preferably, the extender is in the form of a sheet.

[0010] The support body has a thickness of 5-7 mm, a major diameter of 120-150 mm, and a minor diameter of 40-60 mm; the extended leg has a length of 30-40 mm, a thickness of 4-6 mm, and a width of 8-12 mm; the extended leg forms an angle of 110-120° with the bottom surface of the support body.

[0011] Preferably, the suspended structure is integrally prepared from a copolymer of PCL and EVA, wherein the mass percentage of PCL is 30% and the VA content in EVA is 25%, and the extension of the suspended structure is formed by etching PCL in glacial acetic acid to form a microporous structure.

[0012] Preferably, raised protrusions are formed along the periphery of the support.

[0013] Preferably, the support is formed by EVA etching in cyclohexane to create a microporous structure.

[0014] According to the present invention, the oxygen mask can be quickly removed while lying on one's side, is not easy to fall off, and provides good comfort. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the geometric divisions of the human head.

[0016] Figure 2a This is a top view of the suspended structure 100 in one embodiment of the present invention.

[0017] Figure 2b yes Figure 2a Left view of the suspended structure 100.

[0018] Figure 2c yes Figure 2a A sectional view taken along line AA.

[0019] Figure 2d The optimized structure representing the suspended structure 100 is... Figure 2c A sectional view with protruding ridges was added to the original design.

[0020] Figure 3 This is a schematic diagram showing the connection state between the suspension structure 100 and the oxygen mask 200.

[0021] Figure 4 This is a schematic diagram showing the wearing state of the suspension structure 100 and the oxygen mask 200 in one embodiment of the present invention. Detailed Implementation

[0022] To address the challenge of quickly removing the oxygen mask, especially when lying on one's side, the present invention proposes a new solution based on the structure and materials. This solution addresses the design dilemma of not being able to use tethers or other similar devices, as well as the reduced space for facial exposure due to pillows covering the face when lying on one's side.

[0023] This invention provides a mechanism that can be suspended on the forehead and locked in place when lying on one's side, allowing the head area to be exposed. By using this mechanism in conjunction with existing oxygen masks, it is possible to fix the oxygen mask to the face and remove it quickly.

[0024] In this invention, when a person is standing upright after wearing the mask, the directions of the face (up, down, left, right) are as described in the text, the front side of the person is as described in the text, and the back side of the person is as described in the text.

[0025] like Figure 1 The abstract division of the forehead can be imagined as follows: when a person lies on their side, only the glabella 1, forehead 2 and 3, and ear 4 are available, while most of the cheek and hairline on one side are buried in the pillow.

[0026] The levitation structure 100 of the present invention, as shown in the figure Figures 2a-2c As shown, the device includes a flat support body 10 and three extension legs 101, 102, and 103 formed at different positions on the side end of the support body 10. Each extension leg has one end fixed at the different positions on the side end of the support body, and the other end extends towards the back. All three extension legs are elastic, and when they are opened outward, they generate an inward rebound force. By having the extension legs 101 and 102, which are arranged on the left and right sides of the support body 10, secure to the ear area 4, and the extension leg 103 secure to the forehead area 1, the support body 10 is suspended above the forehead.

[0027] Extensions 101, 102, and 103 are all sheet materials. Ear region 4 is a relatively flat surface extending posteriorly from the temporal bone. Glabella region 1 extends downwards from the glabella towards the nasal bridge, forming an inverted triangular, relatively flat surface. Figure 4 As shown, extenders 101 and 102 are pressed onto the flat surface of the ear area, and extender 103 is pressed onto the flat surface of the brow area, thus ensuring stable rebound force.

[0028] like Figure 3 As shown, the extension leg 103 is fixed to the inside of the nose section 209 of the mask 20, and uses the rebound force to press the mask towards the face, and cooperates with the inwardly curved jaw section 210 at the bottom of the mask 20, as shown. Figure 4 As shown, the mask fits snugly over the face, covering the breathing area, allowing for easy placement without straps or ropes. Since the suspended structure is secured to the body solely by its extended legs, removing the mask is also easy and convenient.

[0029] In this embodiment, the extended legs 101 to 103 extend 30 to 40 mm from the side end of the support body 10 toward the back side. In their natural state, they form an angle of 110° with the bottom surface of the support body 10. The lengths of the extended legs 101, 102 and 103 and the angle with the bottom surface can be different.

[0030] The length of the three extension legs should be sufficient to allow the support to suspend above the forehead when the extension legs are attached to the head. Although the size of human skulls varies, the length of the extension legs is a necessary factor to ensure that the structure can suspend. Technicians can adjust the size of the support and the angle of the extension legs according to the actual model so that the extension legs fit into the ear area and the brow area respectively. The brow area is the key to fixing the mask. The ear area is not a limiting requirement. As long as the extension legs can be adjusted so that they can extend beyond the temporal bone and fit onto the relatively flat surface on the left and right sides of the temporal bone, it will not affect the implementation of the invention.

[0031] This allows the support 10 to suspend on the forehead, resulting in the following technical effects:

[0032] 1. Avoid contact between the support body 10 and the skin, so that the suspended structure only presses on the forehead and ear areas where sweating is less, to prevent long-term contact with the forehead area from causing discomfort to the patient.

[0033] 2. For example, there are areas such as the brow bone, the top of the forehead is not a flat surface, and the local shape varies from person to person. When the support comes into contact with the forehead, the direction of the force is difficult to predict, and the support will bear the conflict between the rebound force and the contact force.

[0034] 3. The suspension structure can raise the flexural axis of the extended leg, ensuring elasticity and clamping force. Raising the position of the support body from the clamping axis is beneficial to exerting the supporting function.

[0035] 4. Since the position of the temporal bone varies from person to person, the relative position of the ear area and the support cannot be guaranteed. The suspended structure has a certain amount of room for adjustment. When wearing it, adjusting the height of the support can ensure that the foot is always in contact with the plane of the ear area.

[0036] 5. Considering the manufacturing cost, the position of the sheet extensions on the support is not easy to change. However, the suspension structure can adjust the vertical position of the support relative to the forehead, thereby positioning the sheet surface fixed by the left and right extensions in the appropriate position.

[0037] If the support body 10 is too bulging, the center of gravity of the support body will shift to the side when the patient lies on his side. Therefore, the inventors used a flat solid body as the support body, which can balance the center of gravity problem and ensure support within a limited constraint. In this invention, the support body is 5-7mm thick.

[0038] The planar shape of the support body 10 is not limited, but it is preferable that the portion connecting with the extension legs 101-103 has a large curvature to cope with the reverse resistance of the outward bending of the extension legs. In this embodiment, the support body 10 is elliptical, and the extension legs 101, 102, and 103 are preferably formed with the short side of one end of the plate fitting into the curved edge of the ellipse. In addition, in this embodiment, the extension legs 101 and 102 are formed on the side of the upper half of the major axis of the ellipse and are arranged symmetrically from left to right, while the extension leg 103 is formed at the lower end of the minor axis of the ellipse.

[0039] To balance the inward pressure exerted by the extended legs 101-103 on the support body 10, each extended leg is configured such that its rebound direction lies within the angle formed by the lines connecting it to the other two extended legs on the plane of the support body 10. This prevents the support body 10 from becoming unstable and falling when the patient is in a lateral decubitus position. As a further preferred example, such as... Figure 2a As shown, the extension lines of the extension legs 101 to 103 on the plane of the support body 10 intersect at point O. The rebound direction is preferably consistent with the extension direction. To achieve this consistency, a sheet material can be used and fitted to the plane of the ear area.

[0040] The support 10 is made of a material with a certain plastic support force to prevent the column from deforming due to the reverse force of the rebound force of the extended feet 101, 102 and 103.

[0041] Unlike previous straps that were tied behind the head and behind the ears, the ear area 4 and the forehead area 1 are still heat dissipation areas and are subject to sweating. In order to improve comfort, in this embodiment, at least the inner sides of the extended feet 101, 102 and 103 are formed with perforated structures.

[0042] Surgical procedures often last several hours, with up to eight hours being common, and there are even reports of procedures lasting over 30 hours. Therefore, the inventors took into account the comfort of the 101, 102, and 103 feet when they are attached to human skin for extended periods.

[0043] Preparation Example 1

[0044] (1) The raw materials PCL (number average molecular weight 50,000, melting point 55℃, melt index 7g / 10min) and EVA (VA content 5wt%, melting point 74℃, melt index 1g / 10min) were dried at 50℃ for 24h to remove moisture. The raw materials were placed in a torque rheometer and melt-blended at 90℃ and 50r / min for 8min according to the mass ratio of EVA / PCL = 90 / 10, 80 / 20, 70 / 30, 68 / 32, 67 / 33, 65 / 35, 60 / 40, and 50 / 50. The output material was then molded into 5mm×5cm×5cm EVA / PCL copolymer sheets at 90℃ and 14MPa using a hydraulic press, and then cold-pressed at room temperature for 5min.

[0045] (2) Dissolve the prepared samples in glacial acetic acid, bathe them in a water bath at 50°C for 5 hours, remove them by PCL etching, and then take them out and dry them.

[0046] Twenty sets of sheets were made using the same method and provided to 20 patients of different ages and genders at the Fifth Medical Center of the PLA General Hospital. The sheets were applied to the ear area for 6 hours, and the feedback was as follows.

[0047] Table 1

[0048] Feeling normal 20 people 15 people 2 people 2 people 0 people 1 person 0 people 0 people Feel good 0 people 5 people 18 people 17 people 16 people 0 people 1 person 0 people Excellent body feeling 0 people 0 people 0 people 1 person 4 people 19 people 19 people 20 people

[0049] Based on Table 1, the best sensory experience is achieved when the PCL content reaches 35% or higher, but it remains acceptable between 30% and 35%. Analysis shows that when the PCL content is low, the copolymer exhibits poor continuity, etching cannot penetrate completely, and the etched voids are small. As the PCL content increases, continuity increases, voids enlarge, and the retention of air and water is enhanced. Further analysis reveals that as the PCL content increases, the PCL in the copolymer gradually transitions from an island-dispersed phase to a bicontinuous phase with EVA, until optimal continuity is achieved.

[0050] To simplify the manufacturing process, the present invention provides an embodiment in which the extension leg and the support body are prefabricated from a single material.

[0051] Preparation Example 2-1

[0052] 1. A PCL / EVA blend slurry was prepared by the method shown in step (1) of Preparation Example 1. The PCL mass percentage was 30%, and the EVA content was 25%.

[0053] 2. The blended slurry was injection molded and cured at 90℃ and 14MPa to obtain... Figure 3 The suspended structure shown has the following dimensions: the main support has a long diameter of 140mm, a short diameter of 50mm, and a thickness of 5mm; the extended legs are all 30mm long, 5mm thick, and 10mm wide.

[0054] 3. Immerse the extended legs of the suspended structure in glacial acetic acid and perform PCL etching as shown in step (2) of Preparation Example 1 to create micropores in the extended legs.

[0055] 4. Weld or bond the extended ends of the suspended structure corresponding to the brow area to the inner side of the nose of the oxygen mask. The oxygen mask is a commercially available mask that can hook onto the chin, weighing 95.53g.

[0056] Preparation Examples 2-2 to 25

[0057] Face masks were prepared by changing only the mass ratio of PCL in the blended slurry and the VA content in EVA, and the results are shown in Table 2.

[0058] Table 2

[0059]

[0060]

[0061] Table 2 shows that a PCL / EVA mass ratio of 32:68 and a VA mass content between 25% and 30% yield satisfactory overall results. In contrast, with a PCL / EVA mass ratio of 32:68 and a VA mass content of 30%, only slight deformation of the support structure occurs, and the patient does not experience a constricting sensation, making this the preferred option.

[0062] To achieve more satisfactory results, the inventors further optimized the deformation of the support. Based on preparation examples 2-12, this invention provides two optimized solutions.

[0063] Optimization Example 1

[0064] like Figure 2d As shown, an upright protrusion 107 is formed along the upper edge of the support 10. The protrusion 107 has a height of 3 mm and a thickness of 5 mm. A face mask is prepared according to Preparation Example 2-12.

[0065] Optimization Example 2

[0066] 1. A PCL / EVA blend slurry was prepared as shown in step (1) of Preparation Example 1. The PCL mass percentage was 30%, and the VA content in the EVA was 25%.

[0067] 2. The blended slurry was injection molded and cured at 90℃ and 14MPa to obtain... Figure 3 The suspended structure shown has the following specific dimensions: the main support has a major diameter of 140mm, a minor diameter of 50mm, a thickness of 5mm, and the extension legs are all 3mm thick.

[0068] 3. Immerse the extended legs of the suspended structure in glacial acetic acid and bathe them in a water bath at 50°C for 5 hours to remove them by PCL etching, thereby creating micropores in the extended legs.

[0069] 4. Invert the suspended structure, immerse the support in cyclohexane, and perform EVA etching at 50°C for 5 hours to remove the EVA and create micropores in the support. Then remove and dry.

[0070] 5. Weld or bond the extended ends of the suspended structure corresponding to the brow area to the inner side of the nose of the oxygen mask. The oxygen mask is a commercially available mask that can hook onto the chin, weighing 95.53g.

[0071] Wearing tests were conducted on the masks prepared in preferred examples 1 and 2, and the results are shown in Table 3.

[0072] Table 3

[0073] 2-12 32 / 68 30 / 100 good no no No visible deformation 2-13 32 / 68 30 / 100 good no no No visible deformation

[0074] As can be seen from preferred examples 1 and 2, the support is significantly enhanced. According to the analysis, in preferred example 1, by setting protrusions, out-of-plane constraints are actually added to the flat surface, thereby hindering deformation. In preferred example 1, by etching away EVA, a large number of microporous structures can be obtained. At a mass concentration of 68%, EVA can exhibit good continuity in the copolymer, and the microporous structure has a good absorption effect on deformation stress.

[0075] In any work relating to defining the scope of the claims of this invention, the specific embodiments provided are intended to adequately support appropriate equivalent or superior embodiments derived therefrom, and should in no way be construed as not extending beyond the examples themselves.

Claims

1. A quick-release oxygen mask, comprising a mask body, the mask body including a nose portion covering the bridge of the nose and a jaw portion hooking onto the lower jaw, characterized in that, The oxygen mask also includes a suspension structure, which comprises a flat support body and multiple elastic extension legs, one end of which is fixed at different positions on the side of the support body and the other end of which extends toward the back. One of the extension legs is fixedly connected to the inner surface of the nose. The lengths of the multiple extension legs are such that when the support is attached to the head, it can suspend above the forehead. It includes three extendable legs, and the projection of the rebound direction of any one extendable leg onto the plane of the support body lies between the angles formed by the lines connecting the ends of that extendable leg and the ends of the other two extendable legs. The projections of the rebound directions of the three extended legs onto the plane of the support body intersect at a single point. The support body is elliptical in shape. One end of the extension leg, which is fixedly connected to the inner surface of the nose, is fixedly formed at the lower end of the short diameter of the support body. The other two extension legs are fixedly formed at the side ends of the upper half of the support body and are arranged symmetrically from left to right. The support is made of a material with plastic support force. The thickness of the support is 5-7 mm. Multiple flexible extension legs extend 30-40mm to the back side, and in their natural state form a 110° angle with the bottom surface of the support.

2. The quick-release oxygen mask as described in claim 1, wherein, The extended leg is plate-shaped.

3. The quick-release oxygen mask as described in claim 2, wherein, The suspended structure is integrally prepared from a copolymer of PCL and EVA, wherein the mass percentage of PCL is 30% and the VA content of EVA is 25%, and the extension of the suspended structure is formed by etching PCL in glacial acetic acid to create a microporous structure.

4. The quick-release oxygen mask as described in claim 3, wherein, Rafters are formed along the perimeter of the support.

5. The quick-release oxygen mask as described in claim 3, wherein, The support is formed by EVA etching in cyclohexane to create a microporous structure.

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