Nasal cannula assembly

Abstract

The utility model relates to a nasal intubation assembly which comprises a manifold body, the manifold body comprises a diaphragm-shaped structure which is constructed to separate an inlet chamber from an outlet chamber, the diaphragm-shaped structure is divided into an inlet and an outlet, and the inlet and the outlet both limit an inner cavity with a first length and a first inner diameter. Wherein the lumen includes a protrusion extending at least partially longitudinally along the lumen, a channel having a second length disposed adjacent the septum-like structure and defining an aperture having a second inner diameter, and a pair of noses, the protrusion extending at least partially in a longitudinal direction of the lumen; the nose fork has a proximal end connected to the septum-like structure and a distal end for insertion into a patient's nostrils. The assembly also includes a first sealing member having a recess extending longitudinally along its length such that the recess of the first sealing member conforms to the shape of the interior cavity of the second sealing member. The first length of the inlet and the outlet is equal to the second length of the channel, and wherein the second inner diameter of the channel is less than the first inner diameter of the inlet and the outlet.

Description

Technical Field

[0001] This invention relates generally to ventilation devices, and more specifically to a nasal cannula assembly for supplying and sampling gas to a user via a nasal passage. Background Technology

[0002] Gas sampling systems continuously deliver or supply airflow to a patient via tubing. They are commonly used in hospital settings, such as during certain medical procedures, anesthesia, or sedation. For a variety of reasons, healthcare professionals may wish to provide respiratory support to patients in the form of supplemental oxygen or airflow in intensive care units or home settings. Different types of interfaces can be used to supply air to patients. For example, various nasal masks, full-face masks, oral interfaces, nasal pillows, and nasal cannula interfaces are all suitable.

[0003] Typically, nasal cannulas are used to deliver airflow to a patient through the nostrils or other nasal passages when needed. This device is configured to deliver oxygen into or out of the patient's nostrils. A nasal cannula assembly usually consists of an inlet tube, which can be symmetrical or unilateral, spanning the upper lip. Extending from this tube are a pair of open, forked tubings that extend into the patient's nostrils to deliver oxygen. The advantage of nasal cannulas is that they are more comfortable and easier to use than face masks for most patients. The technology associated with nasal cannula assemblies is generally well-established and disclosed in the prior art.

[0004] US Patent No. 8161971B2 discloses an example of a nasal cannula configured to deliver a fluid flow to a patient. This document discloses a patient interface comprising a body portion configured to communicate with a first fluid path, a first nasal interface extending from the body portion, wherein the nasal interface communicates with the first fluid path, and a fixing portion extending from the body portion adjacent to the nasal interface, wherein the fixing portion is configured and arranged to engage the outer surface of the patient's nose to secure the patient interface. (US Patent)

[0005] US Patent No. 11420002B2 discloses another example, describing a nasal cannula including a manifold portion having an inlet for receiving a fluid flow and at least one outlet for delivering the fluid flow to a patient's nostril. A port located in the manifold portion is used to deliver medication into the fluid flow delivered to the patient by the nasal cannula. US Patent No. 7353826B2 also describes a ventilation interface including a nasal cannula body and a bellows-like structure having a pair of nasal forks located on the top of the nasal cannula body. The bellows-like structure is configured to contact the bottom surface of the nose to form a sealing interface between the nasal cannula body and the nose.

[0006] The main drawback of this device is that the flow of oxygen, carbon dioxide, and patient respiration can create turbulence near the openings of the forked tube and port, thus reducing the overall efficiency of oxygen delivery due to the additional dead zones it introduces. Dead zones in nasal cannulas affect the efficiency of oxygen delivery to the patient. A dead zone refers to the volume of air within the nasal cannula system that does not participate in gas exchange and does not reach the patient's lungs. When a patient inhales through the nasal cannula, the inhaled air consists of fresh oxygen and some exhaled air remaining in the dead zone. This re-breathed air contains a lower concentration of oxygen, reducing the overall efficiency of oxygen delivery. The larger the dead zone volume, the greater the dilution of the inhaled oxygen concentration. The presence of these unwanted dead zones will affect the accuracy of oxygen delivery and carbon dioxide sampling. Therefore, existing devices need to reduce or eliminate unwanted dead zones to prevent the aforementioned drawbacks. This invention provides such a solution to this drawback. Utility Model Content

[0007] One aspect of this invention is to provide a nasal cannula assembly comprising a manifold body having an inlet and an outlet, the manifold body having a significantly reduced length to minimize its dead zone. Advantageously, minimizing the dead zone at the inlet and outlet reduces or eliminates turbulence adjacent to the openings at the inlet and outlet, thereby reducing the mixing of supplied oxygen and exhaled carbon dioxide to be sampled.

[0008] Another aspect of this invention provides a nasal cannula assembly including the aforementioned inlet, the inlet having a protrusion disposed on its inner surface, the protrusion extending at least partially along the longitudinal direction of its lumen. A sealing member with a recess is provided for sealing, the recess being configured to conform to the shape of the inlet's inner lumen. Advantageously, the protrusion serves as an indicator for medical personnel or professionals to connect the inlet to an oxygen source to deliver oxygen to the patient's nostrils.

[0009] In addition, one aspect of the present invention is to provide a nasal cannula assembly comprising a channel extending from a manifold body, wherein the channel has an orifice with a significantly reduced inner diameter to minimize its dead zone.

[0010] Satisfying all or part of the foregoing objectives, embodiments of the present invention describe a nasal cannula assembly comprising a manifold body including a diaphragm-like structure configured to separate an inlet chamber and an outlet chamber, the inlet and outlet chambers extending generally along the axial direction of the manifold body and dividing the interior of the manifold body into an inlet and an outlet, each defined having a first length (L1) and a first inner diameter. The cavity, wherein the end of the cavity inlet includes a protrusion disposed on its inner surface, the protrusion extending at least partially along the longitudinal direction of the cavity; a channel is configured adjacent to a diaphragm-like structure and fluidly connected to an outlet chamber, the channel having a second channel length (L2) and defining a second inner diameter. The nasal cannula assembly includes an inlet and a pair of nasal forks, the pair of nasal forks having a proximal end connected to a septum-like structure and a distal end for insertion into a patient's nose. The nasal cannula assembly also includes a first sealing member adapted to form a fluid connection with the inlet, the first sealing member having a recess extending longitudinally along its length such that the recess of the first sealing member matches the shape of the lumen of the inlet. A second sealing member is adapted to form a fluid connection with an outlet port.

[0011] Preferably, the first length (L1) of the inlet and outlet is equal to the second length (L2) of the channel.

[0012] Preferably, the second inner diameter of the channel Smaller than the first inner diameter of the inlet and outlet

[0013] In a preferred embodiment of the present invention, a pair of nasal forks are disclosed, each nasal fork having an axial separator aligned with a diaphragm-like structure and passing through the wall of the manifold body to intersect the diaphragm-like structure, such that the gas inhaled by the patient enters only the patient's nostrils after passing through the inlet, and at least a portion of the patient's exhaled gas reaches the outlet.

[0014] Preferably, the pair of nose forks includes a first tube extending from an inlet chamber for delivering gas into the patient's nostrils, and a second tube extending from an outlet chamber for receiving gas exhaled from the patient's nostrils.

[0015] More preferably, the length of the first pipe extending from the entrance chamber is shorter than the length of the second pipe extending from the exit chamber.

[0016] In another preferred embodiment of the present invention, a first sealing member and a second sealing member are disclosed, each comprising a sealing element disposed at its proximal end, the sealing element being fixedly and directly connected to the inlet and the outlet, respectively, for sealing thereon.

[0017] Preferably, the first sealing member and the second sealing member each have an opening extending through them in the axial direction and aligned with the inlet and the outlet.

[0018] Another embodiment of the present invention discloses a nasal cannula assembly, which further includes a spherical member disposed at the top of the channel, the spherical member being adjacent to the patient's mouth to intercept exhaled air from the oral cavity and at least deliver the sample to the outlet of the manifold body.

[0019] Exemplary embodiments of this invention describe an outlet connected to a carbon dioxide detector or any suitable device for measuring the concentration or partial pressure of carbon dioxide exhaled by a patient, whereby the device is combined with a suitable pumping device. The pumping device is used to draw in the carbon dioxide exhaled by the patient during exhalation, while the inlet is connected to an oxygen source to deliver oxygen to the patient's nostrils.

[0020] Those skilled in the art will readily understand that the present invention is well-suited to achieving these objectives and obtaining the mentioned objectives and advantages, as well as those inherent therein. The embodiments described herein are not intended to limit the scope of the present invention. Attached Figure Description

[0021] To facilitate understanding of the present invention, preferred embodiments are shown in the accompanying drawings. By examining the preferred embodiments, the present invention, its construction and operation, and its many advantages will be readily understood and appreciated when considered in conjunction with the following description.

[0022] Figure 1 A top perspective view of the nasal cannula assembly of this invention is shown.

[0023] Figure 2 It shows Figure 1 Side perspective view of the nasal cannula assembly.

[0024] Figure 3 It shows Figure 2 A perspective view of the other side of the nasal cannula assembly.

[0025] Figure 4 A front view of the nasal cannula assembly including a spherical member according to the present invention is shown.

[0026] Figure 5 The nasal cannula assembly of this invention is shown along... Figure 4 The sectional view taken by line AA.

[0027] Figure 6 A rear view of the nasal cannula assembly including a spherical member according to the present invention is shown.

[0028] Figure 7 The nasal cannula assembly of this utility model is shown along... Figure 6 The sectional view taken by line BB.

[0029] Figure 8 It shows Figure 6 The enlarged view of part C further illustrates the nose fork of the nasal cannula assembly of this invention.

[0030] Figure 9 A front view of the inlet of the nasal cannula assembly of this invention is shown.

[0031] Figure 10 A side view of the inlet of the nasal cannula assembly of this invention is shown.

[0032] Figure 11 A front view of the first sealing member of the nasal cannula assembly of this invention is shown.

[0033] Figure 12 A front view of the channel of the nasal cannula assembly of this invention is shown. Detailed Implementation

[0034] The present invention will now be described with reference to preferred embodiments and the accompanying drawings. However, it should be understood that the description is limited to the preferred embodiments of the present invention merely for ease of discussion, and it is foreseeable that those skilled in the art can devise various modifications without departing from the scope of the appended claims.

[0035] This utility model relates to nasal intubation assemblies suitable for ventilation applications such as continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), and intermittent positive pressure. Detailed embodiments are described below. Figure 1-3 The diagram illustrates an apparatus assembled in the form of a nasal cannula (1) for delivering an oxygen supply from a source into a patient's nostrils and connecting to a carbon dioxide sampler. The nasal cannula assembly (1) comprises separate components including a manifold body (2), a first sealing member (16), and a second sealing member (18), which can be assembled to form the nasal cannula of this invention. The aforementioned nasal cannula assembly can be made of one or more inert materials, such as polyurethane, silicone, etc. In a preferred embodiment, the nasal cannula assembly of this invention can generally be assembled or disassembled without the use of any tools, fasteners, or adhesives. Alternatively, if a more permanent assembly is required, fasteners or adhesives can be used to assemble the nasal cannula.

[0036] In a preferred embodiment of the present invention, the nasal cannula assembly (1) includes a manifold body (2) having a diaphragm-like structure (3) configured to separate an inlet chamber (4) from an outlet chamber (5). The diaphragm-like structure (3) extends generally along the axial direction of the manifold body (2) and internally divides the manifold body (2) into an inlet (6) and an outlet (7), as shown below. Figure 1-3 As shown. The separation between the entrance chamber (4) and the exit chamber (5) is in Figure 7The best demonstration is given in the text. When the nasal cannula assembly (1) is used in a hospital setting, the inlet (6) is typically connected to an oxygen source, such as a flow canister, to deliver oxygen to the patient's nostrils, while the outlet (7) can be connected to a carbon dioxide detector or any suitable machine capable of measuring carbon dioxide concentration or partial pressure. For example, such a machine can be combined with a suitable pump device to extract carbon dioxide during respiration.

[0037] In a preferred embodiment of the present invention, each inlet (6) and outlet (7) is defined by a first length (L1) and a first inner diameter. The inner cavity (8). In the context of this invention, the inner cavity (8) refers to the internal space within the tubular structure of the inlet (6) and outlet (7). Depending on compatibility with connections to oxygen sources and carbon dioxide samplers, the first length (L1) of the inner cavity (8) can be set in the range of 2 mm to 6 mm. Similarly, the first inner diameter of the inner cavity (8) It can be set in the range of 8mm to 12mm.

[0038] like Figure 2 As shown, the inner cavity (8) of the inlet (6) includes a protrusion (9) disposed on its inner surface (10). Preferably, the protrusion (9) is elongated and extends at least partially along the longitudinal direction of the inner cavity (8). It should be noted that the presence of the elongated protrusion (9) should not obstruct or disrupt the flow of oxygen from the inlet (6) into the inlet chamber (4). However, the elongated protrusion (9) is provided to act as a visual indicator when medical personnel or professionals attempt to connect the inlet port (6) to an oxygen source. In practice, the visual indication of the elongated protrusion (9) should prevent the inlet (6) from being mistakenly connected to the wrong route, such as a carbon dioxide sampler or intravenous catheter. If desired, the elongated protrusion (9) may be painted in a bright color for easy indication.

[0039] Reference Figure 1-3 The manifold body (2) of the nasal cannula assembly (1) includes a channel (11) arranged close to the diaphragm-like structure (3) and in fluid communication with the outlet chamber (5). As used herein, the term "closer" is defined to indicate a direction closer to the manifold body (2) of the nasal cannula assembly (1). Figure 1-3As shown, the channel (11) extends in the transverse direction of the diaphragm-like structure (3) and has a second length (L2). In a preferred embodiment of the present invention, the second length (L2) of the channel (11) is substantially equal to the first length (L1) of the inlet (6) and outlet (7). It is noteworthy that the first length (L1) of the inlet (6) and outlet (7) and the second length (L2) of the channel (11) are shorter than the corresponding parameter lengths of conventional nasal cannulas. The reduced length minimizes the dead zones of the inlet (6) and outlet (7), which subsequently reduces or eliminates turbulence near the openings of the inlet (6) and outlet (7), thereby reducing the mixing of supplied oxygen and exhaled carbon dioxide used for sampling.

[0040] like Figure 12 The diagram shows a front view of the manifold body (2), where a channel (11) defines an aperture (12) having a second inner diameter. The second inner diameter The first inner diameter is significantly smaller than that of the inlet (6) and outlet (7). For example, the second inner diameter of hole (12) It can be set in the range of 1.3mm to 1.7mm. Ideally, the much smaller hole (12) of the channel (11) will also reduce the dead zone around it.

[0041] In a preferred embodiment of this invention, a spherical member (23) is provided at the top of the channel (11), the spherical member (23) having a barrel (24) for guiding carbon dioxide gas exhaled by the patient from the mouth to the outlet chamber (5) through an air passage (25) located within the channel (11). Figure 4-6 As shown. The spherical member (23) is positioned adjacent to the patient's mouth to intercept exhaled carbon dioxide gas from the oral cavity and at least transfer a sample of it to the outlet (7) of the manifold body (2).

[0042] like Figure 1-3 As shown, the manifold body (2) of the nasal cannula assembly (1) also includes a pair of nasal forks (13) having a proximal end (14) connected to the diaphragm-like structure (3) and a distal end (15) for insertion into the patient's nostril. As used herein, the term "distal" is defined to indicate a direction away from the manifold body (2) of the nasal cannula assembly (1). Each nasal fork (13) has an axial separator aligned with the diaphragm-like structure (3) and passing through the wall of the manifold body (2) to intersect with the diaphragm-like structure (23), as shown. Figure 7 This is clearly visible. This ensures that the oxygen inhaled by the patient enters only through the patient's nostrils after passing through the inlet (6), and that the carbon dioxide gas exhaled by the patient at least partially reaches the outlet (7). For example... Figure 1As shown, a pair of nose forks (13) includes a first tube (20) extending from the inlet chamber (4) for delivering oxygen into the patient's nostrils, and a second tube (21) extending from the outlet chamber for receiving carbon dioxide exhaled from the patient's nostrils. To reduce dead zones and thus minimize or eliminate respiratory turbulence, preferably, the length of the first tube (20) extending from the inlet chamber (4) is shorter than the length of the second tube (21) extending from the outlet chamber (5), as... Figure 8 As shown.

[0043] As described above, the various components, including the first sealing member (16) and the second sealing member (18), can be assembled to form the nasal cannula (1) of the present invention. In some embodiments, the manifold body (2) is also described as receiving and holding adjacent components with a removable or releasable locking or sealing engagement. Thus, in order to form the nasal cannula (1) according to one embodiment of the present invention, the first sealing member (16) is adapted to form a fluid connection with the inlet (6) of the manifold body (2). For example, the first sealing member (16) can slide onto the inlet (6) of the manifold body (2) to form a nasal cannula assembly (1) held together by frictional or mechanical engagement. Due to the presence of an elongated protrusion (9) extending on the inner surface of the inlet (6), the first sealing member (16) is provided with a recess (17) extending longitudinally along its length, such that the recess (17) of the first sealing member (16) conforms to the shape of the inner cavity (8) of the inlet (6), such as Figure 2 As shown. Furthermore, in order to form the nasal cannula assembly (1) of this invention, the second sealing member (18) is also adapted to form a fluid connection with the outlet (7), such as... Figure 3 As shown. Similarly, the second sealing member (18) can slide onto the outlet (7) of the manifold body (2) to form a nasal cannula assembly (1) held together by friction or mechanical engagement.

[0044] To ensure the locking or sealing engagement as described above, the first sealing member (16) and the second sealing member (18) include sealing elements (22) disposed at their proximal ends, which are fixedly and directly coupled to the inlet (6) and the outlet (7), respectively. For example, the outer periphery of the sealing element (22) may be designed to be substantially larger than the outer periphery of the inlet (6) and the outlet (7), such that the sealing element (22) abuts against the inlet (6) and the outlet (7) to fill the gap therebetween, thereby forming a sealing engagement. Ideally, the first sealing member (16) and the second sealing member (18) each have an opening (19) extending axially through it and aligned with the inlet (6) and the outlet (7).

[0045] This disclosure includes the appended claims and the content contained in the foregoing description. Although the present invention has been described in detail to some extent in its preferred form, it should be understood that the disclosure of the preferred form of the present invention is by way of example only, and many changes may be made in terms of construction details and the combination and arrangement of some components without departing from the scope of the present invention.

Claims

1. A nasal cannula assembly (1), comprising: The manifold body (2) includes: The inlet chamber (4) and outlet chamber (5) extend generally along the axial direction of the manifold body (2) and internally divide the manifold body (2) into an inlet (6) and an outlet (7), each defining a first length (L1) and a first inner diameter. The inner cavity (8) is characterized by including a diaphragm-like structure (3) configured to separate the inlet chamber (4) and the outlet chamber (5), wherein the inner cavity (8) of the inlet (6) includes a protrusion (9) disposed on its inner surface (10), the protrusion (9) extending at least partially along the longitudinal direction of the inner cavity (8); A channel (11), disposed near the diaphragm-like structure (3) and fluidly connected to the outlet chamber (5), the channel having a second length (L2) and defining a second inner diameter. The hole; and A pair of nasal forks (13) having a proximal end (14) connected to a diaphragmatic structure (3) and a distal end (15) for insertion into the patient's nostril; The first sealing member (16) is adapted to form a fluid connection with the inlet (6), and the first sealing member (16) has a recess (17) extending longitudinally along its length, such that the recess (17) of the first sealing member (16) matches the shape of the cavity (8) of the inlet (6); and The second sealing member (18) is adapted to form a fluid connection with the outlet; The first length (L1) of the inlet (6) and outlet (7) is equal to the second length (L2) of the channel (11); and Among them, the second inner diameter of channel (11) The first inner diameter is smaller than that of the inlet (6) and outlet (7). .

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