JPS61276566A - Nose catheter and oxygen enriching apparatus using the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application The present invention relates to a nasal cannula for supplying a gas such as oxygen-enriched air or oxygen to the nostrils. More particularly, an improved nasal cannula with a specific nasal insertion tube is provided.

<Prior art> Oxygen therapy, which supplies oxygen from oxygen cylinders or liquid oxygen, has traditionally been used for patients with respiratory diseases, and recently oxygen-enriched air obtained by concentrating oxygen in the air has been used With the development of oxygen therapy, the treatment has become increasingly popular.

Nasal cannulas with an inflow tube for the gas from a source and a nasal insertion tube for the outflow of the gas are commonly used to supply gases such as oxygen or oxygen-enriched air to the patient in these oxygen therapies. There is. The nasal insertion tube in such a nasal cannula consists of two tubes inserted into each nasal cavity. In other words, the nasal cavity insertion tube consists of a simple straight tube, and especially when the flow rate of gas flowing into the inflow tube and flowing out from the nasal cavity insertion tube becomes large, the gas may not flow into the patient's nasal cavity. The drawback is that the dynamic pressure from the entire body adds to the discomfort, causing unpleasant irritation to the back of the nasal cavity and increasing resistance during evacuation, which tends to cause pain to the patient.

In particular, when using oxygen-enriched air, there are many cases where a relatively large flow rate of oxygen-enriched air is required, and there has been a strong desire to improve the nasal cannula, which has the above-mentioned drawbacks.

<Objective of the Invention> The present invention provides an excellent nasal cannula that eliminates these drawbacks. In particular, an object of the present invention is to provide a nasal cannula that can minimize pain to a patient using the cannula even when the flow rate of gas increases by improving the structure of the nasal cannula.

<Structure of the Invention> The present inventors conducted extensive research on the flow state of gas in the nasal cavity insertion tube inserted into the nasal cavity when the gas flow rate increases in the nasal cannula. The present inventors have discovered that it is very effective to prevent the excess gas from flowing linearly along the axial direction of the nasal cavity when excess gas flows into the nasal cavity compared to the inhalation peak, and has arrived at the present invention.

That is, the present invention provides a nasal cannula equipped with a gas inflow tube and a gas outflow nasal insertion tube, in which at least a portion of the gas flowing out from the nasal insertion tube has an angle with respect to the axial direction of the nasal insertion tube. A nasal cannula characterized by allowing air to flow in the same direction, a means for inflowing air, a means for increasing the oxygen concentration of the incoming air, a means for extracting the obtained oxygen-enriched air, and a use of the extracted oxygen-enriched air. An oxygen enrichment device having a supply means for supplying the oxygen-enriched air, at the tip of the supply means, an inflow tube for the oxygen-enriched air and a nasal cavity insertion tube for outflowing the oxygen-enriched air, and a nasal cavity insertion tube for the oxygen-enriched air outflow. The present invention provides an oxygen enrichment device characterized by having a nasal cannula that allows at least a portion of oxygen enriched air to flow in a direction at an angle to the axial direction of the nasal insertion tube.

The present invention will be explained in more detail below with reference to the drawings. The nasal cannula according to the present invention, as illustrated in FIG. It is characterized by having an angle with respect to its axial direction, that is, gas flows out in directions other than the axial direction of the nasal cavity insertion tube.

Such nasal cavity insertion tubes include those having an outlet in addition to the gas outlet at the distal end.

As a specific structure thereof, for example, as shown in FIG. 2, there may be mentioned one having a gas outlet 3 in the tube wall.

The shape of the gas outlet 3 may be not only circular but also slit-shaped, rectangular, etc. Other examples of nasal cavity insertion tubes include one in which a notch 4 is provided from the distal end of a fluid tube as shown in FIG. 3, and a nasal cavity insertion tube consisting of a net-like tube wall 5 as shown in FIG. Furthermore, as shown in the cross-sectional view of FIG.
Another example is one having an outlet 8 in the opposite direction.

The nasal cavity insertion tube having an outlet other than the gas outlet at the distal end is not limited to the one described above, and may be of any type. Furthermore, the degree of opening of the gas outlet other than the tip of these nasal cavity insertion tubes, the length, diameter, and cross-sectional shape of the insertion tubes are not particularly limited and can be selected as appropriate. Among these, the cross-sectional shape of the liquid tube is preferably curved or flat, corresponding to the shape of the nasal cavity. In addition, the degree of opening of the gas outlet other than the tip is determined when gas exceeding the maximum value of the patient's inhaled gas flow rate flows into the nasal cannula when the β cavity insertion tube is installed and used in the nasal cavity. In addition, it is desirable that at least a portion of the excess gas, and more preferably a majority of the excess gas, be able to exit through an outlet other than the tip.

Moreover, another nasal cavity insertion tube in the nasal cannula of the present invention is
One preferred embodiment is one in which at least a portion of the gas flowing out of the nasal cavity insertion tube flows in a spiral manner. The position from which the gas flows out in a spiral manner may be only at the tip of the nasal cavity insertion tube, but may be located at a portion other than the tip depending on the case. Further, it is preferable that the gas that flows out in a spiral manner is the majority of the gas that flows out from the G cannula. As a specific structure for causing gas to flow out in a spiral manner, for example, a structure in which a spiral protrusion is provided on the inner wall of a nasal cavity insertion tube can be mentioned.

Another preferred embodiment of the nasal cannula of the present invention is that, as shown in FIG. It is something. In other words, the flow state is such that at least a portion, preferably most, of the outflow gas flows in the direction in which it spreads along the flow, and the direction in which it spreads to the maximum and the flow of gas in the nasal cavity insertion tube can be mentioned. The angle formed with the axial direction is 180 degrees or less, preferably 130 degrees or less, and more preferably 90 degrees or less. The specific structure of such a nasal cavity insertion tube includes, for example, one having a porous body with a spherical surface at the tip of the liquid tube;
One example is one that has a structure that blocks the flow of gas in a part of the center of the tip of the liquid tube. The nasal cannula of the present invention may be made of any material, but specific examples include plastics such as silicone rubber, polyethylene, and vinyl chloride polymers, and metals such as stainless steel. Among these, those made of soft plastic materials are preferred because they cause less discomfort in cavities and the like. In addition, in Fig. 1, the nasal cavity insertion tube 1.1' is replaced with the gas inflow tube 2.2'.
The structure of the connecting part 10 is preferably flat so that it can be easily applied to the area around the nasal cavity during use, and a part of the gas may flow out toward the area around the phloem pores on the nasal cavity side of the part 10. An opening like this may be provided.

Further, the nasal cannula of the present invention is used to allow a certain gas to flow into the nasal cavity, and the gas is not particularly limited.

Specific examples of such gases include oxygen and oxygen-enriched air.

Alternatively, air mixed with therapeutic agents for various respiratory diseases can be used, and excellent effects are particularly likely to be obtained in the case of oxygen-enriched air.

The amount of the gas flowing out from the 6-lumen insertion tube of the 8-cannula of the present invention is preferably 0.11/min or more,
Furthermore, great effects can be obtained when the flow rate is 0.5 Jl/min or more, especially 11 Jl/min or more. Further, the upper limit of the gas outflow m is preferably 1041/min, more preferably 8 min/win, and particularly preferably 6 to 1/1 n for practical purposes.

Further, in the nasal cannula of the present invention, a gas purification means filled with an adsorbent or the like for removing harmful components and malodorous components in the gas, a humidifier or a humidifier for controlling moisture in the gas, etc. It may also be equipped with a dehumidifying means, a sterilizing filter for preventing the invasion of microorganisms, etc.

In particular, when the gas inflow tube is long, a gas purification means and a sterilizing filter are installed as close as possible to the nasal cavity insertion tube to the extent that it does not cause inconvenience to the patient (preferably, a sterilizing filter is installed on the nasal cavity insertion side). By doing so, harmful components and bad odors can be effectively sterilized, and microorganisms can grow. It has the advantage that only a portion needs to be replaced. Note that it is desirable that the gas inflow tubes of nasal cannulas other than those of the present invention also be provided with the above gas purification means and sterilization filter means.

The oxidation enrichment device of the present invention is a device for acquiring air with increased oxygen concentration and supplying the oxygen-enriched air to people who require oxygen-enriched air, such as patients with respiratory diseases. A nasal cannula as described above is provided as a part of the supply means for use, preferably at the distal end. The means for obtaining air with increased oxygen concentration includes means for introducing air, means for increasing the oxygen concentration of the air, and means for taking out the obtained oxygen-enriched air. There are no particular limitations on the means for increasing the oxygen concentration, such as using a membrane with gas permeation selectivity, using an adsorbent with gas adsorption selectivity, or using a membrane with gas absorption selectivity. Examples include those that use an absorbent containing a carbon dioxide, those that use centrifugal force, or those that use a combination of these. Among these, those using a gas selective permeation membrane, those using a gas selective adsorbent, and those using a combination thereof are preferably used in practice.

Such an oxygen enrichment device supplies oxygen-enriched air with an oxygen concentration of 25% or more, more preferably 30% or more, to the user, and the lower limit of the supply amount of the oxygen-enriched air is 0.1fi. /i+in, more preferably 0.51/1n, especially 11/min, and the upper limit is 10J
2/In1n, even 817m1n, especially 61/min
It is desirable that

When this supply amount is large, the advantages of the nasal cannula, which is a feature of the present invention, are more effectively utilized.

The specific structure of a membrane type oxygen enrichment device, which is one of the preferred embodiments of the oxygen enrichment device of the present invention, will be illustrated below. That is, the device includes a fan means for taking in atmospheric air, a module comprising a number of membrane cells configured such that the atmospheric air passes through the surface of a gas selectively permeable membrane and oxygen-enriched air permeates therethrough; Examples include vacuum pump means and conduit means for maintaining the pressure on the back side of the membrane at a pressure lower than that of the atmosphere and for taking out oxygen-enriched air from the module, and a means for removing oxygen. Further, as a specific example of the adsorption type oxygen enrichment device which is one of the other preferred embodiments of the present invention, two adsorbent beds filled with an adsorbent that selectively adsorbs nitrogen gas are added to the adsorbent bed. a compressor means for admitting pressurized atmospheric air, conduit means for removing oxygen-enriched air from the adsorbent bed, and supply means for making the oxygen-enriched air available for use; Examples include devices in which two adsorption beds are operated in alternating pressurization-depressurization-regeneration cycles. In either device, it is desirable that the conduit means for taking out the oxygen-enriched air or the supply means for making it available for use include means for adjusting the flow rate of the supplied oxygen-enriched air.

<Effects of the Invention> Since the nasal cannula and the oxygen enrichment device equipped with the same according to the present invention have a specific nasal cavity insertion tube, even if the flow rate of gas flowing out from there increases, the dynamic pressure of the gas in the nasal cavity remains constant. It does not easily grow large and causes very little pain to the person using it.

It has the excellent effect of being able to be reduced. Note that even when the flow rate of the gas is small, there is an advantage that the discomfort given to the user can be kept to a minimum.

[Brief explanation of the drawing]

FIG. 1 illustrates the nasal cannula of the present invention,
FIG. 2 is an enlarged view of the nasal cavity insertion tube in FIG. 1. 3 to 6 are enlarged views of the nasal cavity insertion tube section in other examples of the nasal cannula of the present invention. Fig. 1 Fig. 2 Fig. 3 g Fig. 4 Fig. 5 Fig. fs 6 Procedural amendment mouth March ζ, 1985, Palace of the Commissioner of Licensing Agency 1, Indication of the case Patent application 1986-115271 8 2, Title of the invention Representative of nasal cannula and oxygen enrichment device using it
Sashibe Okamoto Column "Detailed Description of the Invention" in the specification (1) "Improved" in the fourth line from the bottom of the second page of the specification is corrected to "Improved". (2) In the 6th line from the bottom of page 7, ``Teyoiga'' is corrected to ``Demoyoiga''. (3) On page 10, line 10, "1 insertion side" is corrected to "insertion tube side." (4) “Proliferation, etc.” on page 10, line 11 of the same page has been changed to “proliferation prevention, etc.”
I am corrected. (5) On page 12, line 5, "into one effect" is corrected to "effectively."that's all

Claims (6)

[Claims] (1) In a nasal cannula equipped with a gas inflow tube and a nasal cavity insertion tube for gas outflow, at least a portion of the gas flowing out from the nasal cavity insertion tube is directed at an angle with respect to the axial direction of the nasal cavity insertion tube. A nasal cannula characterized by a flowing structure. (2) The nasal cannula according to claim 1, wherein the nasal cavity insertion tube has a gas outlet in addition to the gas outlet at the distal end. (3) The nasal cannula according to claim 1, wherein at least a portion of the gas flowing out from the nasal cavity insertion tube flows in a spiral shape. (4) The nasal cannula according to claim 1, wherein at least a portion of the gas flowing out from the nasal cavity insertion tube flows radially. (5) The nasal cannula according to any one of claims 1 to 4, wherein the gas is oxygen-enriched air. (6) In an oxygen enrichment device having a means for introducing air, a means for increasing the oxygen concentration of the inflowing air, a means for taking out the obtained oxygen-enriched air, and a supply means for making the extracted oxygen-enriched air available for use. , a part of the supply means is provided with an inflow tube for the oxygen-enriched air and a nasal cavity insertion tube for the oxygen-enriched air outflow, and at least a part of the oxygen-enriched air flowing out from the nasal cavity insertion tube is supplied to the nasal cavity. An oxygen enrichment device characterized by having a nasal cannula configured to flow in a direction at an angle to the axial direction of the insertion tube.