High flow oxygen cannula

Abstract

The application provides a high-flow oxygen inhalation tube, which comprises a head fixing band, an oxygen outlet fixing part and an oxygen supply tube which are connected in sequence; the oxygen outlet fixing part is integrally formed and comprises two cheek fixing bands, a nose front swelling cavity and two nasal cavity tubes; the nose front swelling cavity is communicated with the root parts of the two nasal cavity tubes at positions corresponding to the nostrils, and the tail part of the nose front swelling cavity is communicated with the oxygen supply tube; the two ends of the two cheek fixing bands are connected with the head fixing band; the application is used in communication with a high-flow humidified oxygen inhalation bottle and can be used for low-to-high flow oxygen inhalation, avoids loosening of the two cheek fixing bands and the nose front swelling cavity, and has simple structure, low cost and safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to high-flow oxygen inhalation tubing. Background Technology

[0002] High-flow oxygen therapy is of significant value in oxygen therapy, serving as an important treatment method between mask oxygen therapy and endotracheal intubation, and can greatly reduce the likelihood of patients needing endotracheal intubation. Simultaneously, high-flow oxygen therapy can significantly reduce the incidence of hypoxemia caused by insufficient ventilation due to respiratory depression during intravenous anesthesia, which is of paramount importance in improving the safety of intravenous anesthesia in outpatient settings or during surgery.

[0003] However, high-flow oxygen therapy currently relies on high-flow oxygen therapy devices priced between 70,000 and 150,000 yuan. These devices require heating tubing priced between 400 and 800 yuan and high-flow nasal cannulas priced between 200 yuan, making them difficult to popularize in outpatient clinics of large hospitals and small clinics.

[0004] We previously designed and applied for the commercialization of a product with application number 202520340498X, which has achieved good results in clinical use. However, its disposable high-flow oxygen cannula still has shortcomings, mainly: 1. The prenasal oxygen supply unit has many components, making assembly difficult and costly; 2. The prenasal oxygen supply unit is composed of multiple components, and if there is any traction during use, the components may loosen, affecting the high-flow oxygen therapy effect; 3. The connection and fixation with the oxygen cylinder is not ideal. If it is too loose, it is easy to fall off, and if it is too tight, it is difficult to remove and detach during replacement; 4. The cannula inserted into the nasal cavity may bend and become blocked, affecting the oxygenation effect; 5. The head strap is difficult to assemble with the prenasal oxygen supply unit, resulting in high costs.

[0005] This is a common defect in products on the market. We have optimized the design of the product to further reduce costs and make it easier to be used in clinical settings. Summary of the Invention

[0006] To address the aforementioned deficiencies in the prior art, the present invention provides a high-flow oxygen inhalation tube comprising a head fixation strap, an oxygen outlet fixation part, and an oxygen supply tube connected in sequence; the oxygen outlet fixation part is integrally formed and includes an anterior nasal enlargement cavity corresponding to the front of the nasal cavity, two cheek fixation straps that fit against the cheeks on both sides of the nasal cavity, and two nasal tubes inserted into the nasal cavity; the anterior nasal enlargement cavity is sealed and connected to the roots of the two nasal tubes at the position corresponding to the nostrils.

[0007] The outer diameter of the anterior nasal cavity is larger than that of the oxygen supply tube. The tail opening of the anterior nasal cavity is sealed and connected to the oxygen supply tube. The two ends of the cheek fixation straps are connected to the head fixation straps.

[0008] Furthermore, the two ends of the cheek fixing straps and the head fixing strap are fixed by an insert structure, which includes a buckle cavity at both ends of the cheek fixing straps and a snap fastener at the corresponding end of the head fixing strap.

[0009] The buckle cavity includes a buckle inlet, a buckle chamber, and a strap outlet with an inner cavity smaller than the buckle chamber, which are sequentially connected at the ends of the two cheek fixing straps;

[0010] The male and female buckles include a male buckle with spikes and a matching female buckle with spike holes. After the spikes of the male buckle are matched and fixed with the spike holes of the female buckle, a fixed buckle body is formed. The height and diameter of the fixed buckle body are greater than the head fixing strap.

[0011] The buckle inlet and buckle cavity are adapted to the fixed buckle body. The cross-section of the inner cavity of the belt outlet is larger than the cross-section of the head fixing strap and smaller than the maximum longitudinal section of the fixed buckle body.

[0012] Furthermore, the head fixing strap is a single piece, with both ends fixed to the ends of the cheek fixing straps, and a Z-shaped adjustment buckle is inserted through the middle of the head fixing strap.

[0013] Furthermore, the oxygen supply tube is respectively sealed and connected at both ends with an expansion cavity interface and an oxygen connection interface; the openings at both ends of the expansion cavity interface are respectively matched, fixed and sealed to the tail opening of the anterior nasal expansion cavity and the oxygen supply tube; one end of the oxygen connection interface is matched, fixed and sealed to the oxygen supply tube, and the other end is adapted to the oxygen outlet of the oxygen inhalation bottle.

[0014] Furthermore, the length of the anterior nasal enlargement cavity is 30-50 mm, and the cross-sectional area of ​​the cavity is greater than 29 mm. 2 The cross-sectional area of ​​the nasal canal is 7-30 mm. 2 The oxygen supply tube is 200-600cm long, with an inner cross-sectional area of ​​12.5-28.5mm. 2 .

[0015] Furthermore, the sidewall of the anterior nasal enlargement cavity is configured as a corrugated wall.

[0016] Furthermore, the nasal tube has a secondary air outlet at its end inserted into the nasal cavity, which penetrates the side wall.

[0017] Furthermore, the portion of the tube at the opening of the prenasal enlargement cavity of the expansion port is configured as a corrugated tube.

[0018] Furthermore, an operating wing is provided along the long axis of the outer wall of the oxygen connection interface.

[0019] The beneficial effects of this invention are:

[0020] 1. Compared with existing products, this product, when used with oxygen cylinders, avoids the use of expensive machines and heating pipelines, reduces usage costs, and is easy to popularize;

[0021] 2. The oxygen outlet fixing part is integrally molded, which reduces costs and prevents components from loosening during use, thus increasing safety.

[0022] 3. The two ends of the cheek fixation straps and the head fixation straps adopt a snap-fit ​​structure, which reduces costs and increases the fixation strength;

[0023] 4. The tube body of the anterior nasal enlargement cavity sidewall or the enlargement cavity interface is made of corrugated tube to avoid blockage of the lumen;

[0024] 5. An auxiliary air outlet is provided at the end of the nasal tube, penetrating the side wall, to prevent the nasal tube from becoming blocked;

[0025] 6. The oxygen connection interface is equipped with an operating fin for easy replacement of disposable consumables. Attached Figure Description

[0026] Figure 1 These are schematic diagrams of the overall structure of the present invention from two different perspectives;

[0027] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the integrally formed oxygen outlet fixing part of the present invention (a is the front view, b is the top view, and c is the bottom view).

[0029] Figure 4 This is a schematic diagram of the buckle cavity at the end of the cheek fixing straps of the present invention (a is a top view, b is a longitudinal section, and c is a transverse section).

[0030] Figure 5 The diagram shows the assembly of the through-hole structure of the present invention and the structural diagram after assembly (a is the assembly diagram; b is the longitudinal section assembly diagram; c is the longitudinal section assembly completed diagram; d is the cross section assembly completed diagram).

[0031] In the picture,

[0032] 1. Head fixation strap; 2. Oxygen outlet fixation part; 21. Nasal expansion cavity; 22. Cheek fixation straps; 23. Nasal tube; 3. Oxygen supply tube; 31. Expansion cavity interface; 32. Oxygen connection interface; 4. Buttoning cavity; 41. Buttoning entrance; 42. Buttoning cavity; 43. Outlet; 51. Male buckle; 52. Female buckle; 5. Fixing buckle body. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0034] High-flow oxygen therapy is an important treatment method between mask oxygen therapy and endotracheal intubation. It can significantly reduce the likelihood of patients needing endotracheal intubation and greatly reduce the incidence of hypoxemia caused by insufficient ventilation due to respiratory depression during intravenous anesthesia. It has extremely significant value in improving the safety of intravenous anesthesia in outpatient settings or surgery. Currently, commonly used traditional high-flow oxygen tubing includes a headband, an oxygen delivery fixation unit, and a breathing circuit connection tube. The breathing circuit connection tube is used to connect to the heated breathing circuit of the high-flow oxygen device. It must be used in conjunction with both the heated circuit and the high-flow oxygen device, resulting in extremely high costs and difficulties in widespread adoption. We designed and applied for commercialization of a product with application number 202520340498X, which significantly reduces the cost of clinical use. However, it still has similar drawbacks to traditional high-flow oxygen tubing: numerous components, especially the anterior nasal cavity corresponding to the front of the nasal cavity and the cheek fixation bands on both sides of the nasal cavity, which are multiple parts, making production and assembly difficult and costly. It is also prone to loosening under tension, leading to oxygen leakage and a significant decrease in oxygen delivery efficiency. The cost remains too high. To further reduce costs and increase portability and safety during use, we have optimized the product to make it easier to adopt in clinical settings, as detailed below:

[0035] like Figures 1-3 As shown, the high-flow oxygen inhalation tube of the present invention includes a head fixation strap 1, an oxygen outlet fixation part 2, and an oxygen supply tube 3 connected in sequence. The oxygen outlet fixation part 2 is integrally formed and includes an anterior nasal enlargement cavity 21 corresponding to the front of the nasal cavity, two cheek fixation straps 22 attached to the cheeks on both sides of the nasal cavity, and two nasal tubes 23 inserted into the nasal cavity. The anterior nasal enlargement cavity 21 is sealed and connected to the roots of the two nasal tubes 23 at the position corresponding to the nostrils. The outer diameter of the anterior nasal enlargement cavity 21 is larger than that of the oxygen supply tube 3, and the opening at the tail of the anterior nasal enlargement cavity 21 is sealed and connected to the oxygen supply tube 3. The two ends of the cheek fixation straps 22 are connected to the head fixation strap 1.

[0036] Compared with the product with application number 202520340498X, the assembled external structure of this invention is basically the same. The main difference is that the oxygen outlet fixing part 2 of this invention is integrally formed, which is equivalent to the structure of the corresponding part of the product with application number 202520340498X after assembly of several parts. The advantage of this improvement is that the production cost is greatly reduced, the manual assembly cost is also reduced, and the risk of air leakage due to loosening between parts is avoided during use.

[0037] In actual production, the oxygen outlet fixing part 2 is integrally injection molded, and the material can be a soft medical material, such as silicone or PVC. The main body of the mold is demolded from top to bottom. The side core pulling is used for the anterior nasal expansion cavity 21, and the bending core pulling is used for the two nasal tubes 23. Fixing cavities for the head fixing strap 1 are set at both ends of the cheek fixing strap 22, and the liquid adopts a core pulling structure, finally realizing the integral injection molding production process.

[0038] like Figures 4-5As shown, the two ends of the cheek fixing band 22 and the head fixing band 1 are fixed by an interlocking structure. The interlocking structure includes a buckle cavity 4 at both ends of the cheek fixing band 22 and a male and female buckle at the corresponding ends of the head fixing band 1. The buckle cavity 4 includes a buckle inlet 41, a buckle recess 42 and a band outlet 43 with an inner cavity smaller than the buckle recess 42, which are sequentially connected at the ends of the cheek fixing band 22. The male and female buckles include a male buckle 51 with a spike and a matching female buckle 52 with a spike hole. After the spike of the male buckle 51 matches and is fixed with the spike hole of the female buckle 52, a fixing buckle body 5 is formed. The height and diameter of the fixing buckle body 5 are greater than those of the head fixing band 1. The buckle inlet 41 and the buckle recess 42 are adapted to the fixing buckle body 5. The cross-section of the inner cavity of the band outlet 43 is greater than the cross-section of the head fixing band 1 and smaller than the maximum longitudinal section of the fixing buckle body 5.

[0039] Specifically, the male and female buckles use a common circular structure. The male buckle 51 preferably uses a pointed spike. When assembled at the end of the head-fixing strap 1, there is no need to drill holes in the head-fixing strap 1; it can be directly inserted into the spike hole of the female buckle 52 through the middle of the head-fixing strap 1 for matching and fixing. The spike of the male buckle 51 should not exceed the length of the spike hole of the female buckle 52. After the spike of the male buckle 51 is matched and fixed with the spike hole of the female buckle 52, the spike of the male buckle 51 should be completely contained within the spike hole cavity of the female buckle 52, forming a stable fixing buckle body 5. The diameter of the fixing buckle body 5 should be smaller than the width of the corresponding cheek fixing straps 22, and the height of the fixing buckle body 5 should be smaller than the thickness of the corresponding cheek fixing straps 22, so that there is sufficient space within the cheek fixing straps 22 to set the buckle cavity 4.

[0040] Correspondingly, the buckle inlet 41 should be located on the upper side of the cheek fixing band 22 away from the skin to avoid contact with the skin and the formation of indentations on the skin surface. The buckle inlet 41 should be adapted to the fixing body 5, preferably a rectangular opening, the size of which should allow the side edge of the fixing body 5 to pass through easily; or a circular opening, adapted to the cross-section of the fixing body 5 for fastening. The buckle cavity 42 should be adapted to the fixing body 5, specifically, its length should be slightly larger than the diameter of the fixing body 5, its width should match the diameter of the fixing body 5, and its height should match the thickness of the fixing body 5, so that the fixing body 5 can be tightly fitted into the buckle cavity 42. The buckle cavity 42 is preferably designed as an arc shape adapted to the fixing body 5 on the side near the band outlet 43, so that the arc-shaped edge of the fixing body 5 can be more securely held in the adapted arc-shaped buckle cavity 42.

[0041] The outlet 43 is located at the end section of the cheek fixing straps 22, and its central axis is preferably on the same straight line as the central axis of the buckle cavity 42. The width of the outlet 43 is smaller than the diameter of the fixing buckle 5, and the height of the outlet 43 is smaller than the thickness of the fixing buckle 5. A stepped structure in the height and width direction is formed at the junction of the outlet 43 and the buckle cavity 42, which forms a firm fixing effect on the fixing buckle 5 held in the buckle cavity 42.

[0042] like Figures 1-2 As shown, the head-fixing strap 1 is a single piece, with both ends fixed to the ends of the cheek-fixing straps 22 respectively. A U-shaped adjusting buckle is inserted through the middle of the head-fixing strap 1. The inner cavities of the two buckle holes of the U-shaped adjusting buckle should be slightly smaller than the cross-section of the head-fixing strap 1, so that the head-fixing strap 1 can be inserted and maintain a certain tension.

[0043] like Figure 2 As shown, the oxygen supply tube 3 is sealed and connected at both ends with an expansion cavity interface 31 and an oxygen connection interface 32. The openings at both ends of the expansion cavity interface 31 are respectively matched, fixed, and sealed to the tail opening of the anterior nasal expansion cavity 21 and the oxygen supply tube 3. One end of the oxygen connection interface 32 is matched, fixed, and sealed to the oxygen supply tube 3, and the other end is adapted to the oxygen outlet of the oxygen inhalation bottle. The function of the oxygen supply tube 3 is to connect tightly to the oxygen outlet of the oxygen inhalation bottle through the oxygen connection interface 32, so as to provide an oxygen source through the oxygen inhalation bottle. It can be used for low-flow oxygen inhalation or medium-to-high-flow oxygen inhalation. The oxygen inhalation bottle with application number 202520340498X is preferred, and the oxygen range should be greater than 0-40L / min, preferably 0-100L / min.

[0044] The anterior nasal enlargement cavity 21 has a length of 30-50 mm and an internal cross-section greater than 29 mm. 2 The cross-sectional area of ​​the nasal canal 23 is 7-30 mm. 2 The oxygen supply tube 3 is 200-600cm in length, with an inner cross-sectional area of ​​12.5-28.5mm. 2 This is essentially the same as the content of application number 202520340498X, applicable to high-flow oxygen therapy from children to adults, and will not be repeated here.

[0045] Preferably, the sidewall of the anterior nasal enlargement cavity 21 is made of corrugated wall, which can support the soft anterior nasal enlargement cavity 21 and prevent the anterior nasal enlargement cavity 21 from collapsing.

[0046] Preferably, the nasal tube 23 has a secondary air outlet through the side wall at the end inserted into the nasal cavity, forming a double oxygen outlet. This ensures normal oxygen discharge when the head of the nasal tube 23 is blocked, thus ensuring the oxygen supply effect to the patient's nasal cavity.

[0047] Preferably, the portion of the tube at the tail opening of the nasal expansion cavity 21 of the expansion port 31 is made of corrugated tubing, which also supports the soft sidewalls of the expansion port 31 and prevents the expansion port 31 from bending or folding.

[0048] Preferably, the oxygen connection interface 32 has an operating wing along its long axis on its outer side wall. High-flow oxygen supply requires high pressure, and to prevent the oxygen connection interface 32 from detaching, it needs to be tightly connected to the oxygen outlet of the oxygen cylinder. Disconnection is difficult. The operating wing facilitates disconnection by rotating the oxygen connection interface 32, making it easy to detach from the tightly fitted oxygen outlet of the oxygen cylinder. This also facilitates replacement with a new product when used for outpatient intravenous anesthesia examinations.

[0049] In summary, this invention, through further optimization of the high-flow oxygen inhalation tubing, significantly reduces production costs, simplifies the process, and greatly improves safety. It no longer requires the use of heated tubing and a high-flow oxygen inhalation device, making it extremely easy to widely adopt in clinical clinics and small hospitals, bringing benefits to patients.

[0050] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A high-flow oxygen inhalation tubing, characterized in that: It includes a head fixing strap (1), an oxygen outlet fixing part (2), and an oxygen supply tube (3) connected in sequence; The oxygen outlet fixing part (2) is integrally formed and includes an anterior nasal enlargement cavity (21) corresponding to the front of the nasal cavity, two cheek fixing bands (22) that fit the cheeks on both sides of the nasal cavity, and two nasal tubes (23) inserted into the nasal cavity; the anterior nasal enlargement cavity (21) is sealed and connected to the root of the two nasal tubes (23) at the position of the nostril. The outer diameter of the anterior nasal enlargement cavity (21) is larger than that of the oxygen supply tube (3). The tail opening of the anterior nasal enlargement cavity (21) is sealed and connected to the oxygen supply tube (3). The two ends of the cheek fixation band (22) are connected to the head fixation band (1).

2. The high-flow oxygen inhalation tube according to claim 1, characterized in that: The two ends of the cheek fixing band (22) and the head fixing band (1) are fixed by an insert structure, which includes a buckle cavity (4) at both ends of the cheek fixing band (22) and a male and female buckle at the end of the corresponding head fixing band (1). The buckle cavity (4) includes a buckle inlet (41), a buckle cavity (42), and a strap outlet (43) with an inner cavity smaller than the buckle cavity (42), which are sequentially connected at the ends of the two cheek fixing straps (22). The male and female buckles include a male buckle (51) with spikes and a matching female buckle (52) with spike holes. After the spikes of the male buckle (51) are matched and fixed with the spike holes of the female buckle (52), a fixed buckle body (5) is formed. The height and diameter of the fixed buckle body (5) are greater than the head fixing strap (1). The buckle inlet (41) and buckle cavity (42) are adapted to the fixing buckle body (5). The cross-section of the inner cavity of the belt outlet (43) is larger than the cross-section of the head fixing strap (1) and smaller than the maximum longitudinal section of the fixing buckle body (5).

3. The high-flow oxygen inhalation tube according to claim 2, characterized in that: The head fixing strap (1) is a single piece, with both ends fixed to the two ends of the cheek fixing straps (22) respectively, and a shaped adjustment buckle is inserted through the middle of the head fixing strap (1).

4. The high-flow oxygen inhalation tube according to claim 1, characterized in that: The oxygen supply tube (3) is sealed and connected at both ends with an expansion cavity interface (31) and an oxygen connection interface (32); the openings at both ends of the expansion cavity interface (31) are matched and fixedly sealed to the tail opening of the anterior nasal expansion cavity (21) and the end of the oxygen supply tube (3); one end of the oxygen connection interface (32) is matched and fixedly sealed to the end of the oxygen supply tube (3), and the other end is adapted to the oxygen outlet of the oxygen inhalation bottle.

5. The high-flow oxygen inhalation tube according to claim 1, characterized in that: The anterior nasal enlargement cavity (21) is 30-50 mm in length and has an internal cross-section greater than 29 mm. 2 The cross-section of the nasal canal (23) is 7-30 mm. 2 The oxygen supply tube (3) is 200-600cm long and has an inner cross-section of 12.5-28.5mm. 2 .

6. The high-flow oxygen inhalation tube according to claim 1, characterized in that: The sidewalls of the anterior nasal enlargement cavity (21) are corrugated.

7. The high-flow oxygen inhalation tube according to claim 1, characterized in that: The nasal tube (23) has a secondary air outlet through the side wall at the end inserted into the nasal cavity.

8. The high-flow oxygen inhalation tube according to claim 4, characterized in that: The portion of the tube at the tail opening of the prenasal enlargement cavity (21) of the expansion port (31) is configured as a corrugated tube.

9. The high-flow oxygen inhalation tube according to claim 4, characterized in that: The oxygen connection interface (32) has an operating wing along its long axis on its outer side wall.

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