JP6268632B2 - Oxygen supply adapter for speech valves - Google Patents

Description

  The present invention relates to a speech valve oxygen supply adapter that is attached to a speech valve used for a tracheostomy tube and supplies oxygen to the speech valve.

  As is well known, a tracheostomy tube (also referred to as a “cannula”) is used in patients with inadequate respiratory function, etc., and performs tracheostomy on the patient and inserts the tip of the tracheostomy tube into the incision. (See, for example, Patent Document 1).

  When such a tracheostomy tube is used, if the patient's symptoms are severe, a ventilator is connected to the outer opening of the tracheostomy tube, and external air is sent to the lungs through the tracheostomy tube. Can breathe without taking air from the throat or nose.

  On the other hand, when the patient's symptoms are reduced and spontaneous breathing is possible, remove the ventilator from the tracheostomy tube and attach a speech valve that acts as a check valve to the outer opening of the tracheostomy tube There is a case.

  In the case of inspiration, the external air is taken into the lungs through the speech valve as inspiration, and in the case of exhalation, air is not passed through the speech valve and exhaled from the mouth or nose through the vocal cord side of the trachea. It is possible to vomit, and as a result, the patient can speak.

  In patients equipped with such a speech valve, it may be necessary to supply oxygen supplementarily via a tracheostomy tube. When oxygen is supplied by an oxygen supply adapter for a speech valve, supply from the oxygen supply pipe It is necessary to make the intake air have an appropriate oxygen concentration due to the oxygen that is generated.

  Therefore, a speech valve oxygen supply adapter that is attached to the outer opening of the speech valve and supplies oxygen in an auxiliary manner to bring the intake air to an appropriate oxygen concentration has been proposed (for example, Patent Document 2, Non-Patent Document). Reference 1).

JP 2002-345916 A JP 2008-55232 A

Package information on medical devices Package attached to speech valve for tracheostomy [searched May 7, 2013], Internet (URL: http://www.info.pmda.go.jp/downfiles/md/whatsnew/companylist /companyframe.html http://www.info.pmda.go.jp/ygo/pack/21000BZY00261000_A_01_05/)

However, for example, according to the oxygen supply adapter for a speech valve described in Patent Document 2, since the supplied oxygen easily escapes to other than the intake port, it is not easy to make the intake air have an appropriate oxygen concentration depending on the ventilation conditions. Absent.
On the other hand, according to the speech valve described in Non-Patent Document 1, it is possible to set the intake air to an appropriate oxygen concentration, but depending on the ventilation conditions, the intake resistance when the patient inhales increases, It is not easy to breathe comfortably.

  Therefore, oxygen supplied to the outer opening of the speech valve can ensure the oxygen concentration of the inhaled air appropriately, and suppresses the increase in inspiratory resistance when the patient inhales and comfortably inhales There is a strong demand for an oxygen supply adapter for a speech valve that can be used.

  The present invention has been made in consideration of such circumstances, and the oxygen supplied to the outer opening of the speech valve can appropriately ensure the oxygen concentration of the air to be inhaled, and when the patient inhales An object of the present invention is to provide an oxygen supply adapter for a speech valve that can suppress an increase in intake resistance and can take in comfortably.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 is an oxygen supply adapter for a speech valve that is attached to a speech valve and supplies oxygen to an intake port of the speech valve, and an oxygen supply pipe that supplies oxygen to the intake port; A first wall portion that suppresses oxygen blown from the oxygen supply pipe from flowing from the intake port toward the outer periphery, and the first wall portion surrounds the periphery of the intake port And extending to the front side of the air intake port to the same height as the air outlet of the oxygen supply pipe or a position higher than the air outlet, and extending toward the inner peripheral side of the air inlet on the front side A second wall portion having an opening portion with an opening ratio of 45% or more with respect to the air inlet; the opening portion is divided into a plurality of vent holes by a plurality of partition wall portions; and the plurality of partition wall portions are Partition wall adjacent at the center of the opening Characterized in that is connected via a curved portion is connected through the second wall portion and the curved portion on the outer peripheral side of the opening and.

According to the oxygen supply adapter for a speech valve according to the present invention, the position surrounding the periphery of the intake port of the speech valve and the height equal to or higher than the outlet of the oxygen supply pipe toward the front side of the inlet Therefore, the oxygen blown out from the oxygen supply pipe is suppressed from flowing from the intake port toward the outer periphery. As a result, the oxygen concentration of the air sucked from the intake port is ensured appropriately.
In addition, the first wall portion includes, on the front side, a second wall portion having an opening portion that extends toward the inner peripheral side of the intake port and has an opening ratio of 45% or more with respect to the intake port. Inhalation resistance can be kept low, so that the patient can inhale properly.
The opening is divided into a plurality of vents by a plurality of partition walls, and the plurality of partition walls are connected to the adjacent partition wall at the center of the opening via a curved portion, and the outer periphery of the opening Since it is connected to the second wall portion via the curved portion, it is possible to suppress the generation of wind noise.

In this specification, the front of the intake port refers to the side away from the patient when the speech valve is attached to the patient. Moreover, extending to a position higher than the blower outlet of the oxygen supply pipe means that the first wall portion extends to a position farther from the intake port than the blower outlet of the oxygen supply pipe.
Moreover, surrounding the periphery of the intake port means surrounding the periphery of the intake port over the entire circumference.

  In this specification, for example, an opening having an opening ratio of 45% or more with respect to the intake port means that the opening has an area of the intake port of the speech valve (in addition to an intake channel area, for example, a check). It means having an opening area of 45% or more with respect to the area including the valve locking portion and the support column holding it.

Here, the fact that the partition wall portion is arranged at a position that does not overlap with the support column that crosses the intake port, for example, does not include a portion where the partition wall portions or the support columns intersect in the central portion of the intake port. It is good as well. In addition, for example, when the partition wall portion and the support pillar extend radially from the central portion and are not arranged in parallel between the upper and lower sides, they may not overlap each other because the directions extending from the central portion are different.

The invention according to claim 2 is the oxygen supply adapter for a speech valve according to claim 1, characterized in that an opening ratio with respect to the intake port is 55% or more.

According to the oxygen supply adapter for a speech valve according to the present invention, since the opening ratio with respect to the intake port is 55% or more, the intake resistance can be further reduced.

The invention according to claim 3 is the oxygen supply adapter for a speech valve according to claim 1 or 2 , wherein the vent has a shape of an edge portion connecting a plurality of curved portions and the curved portions. It is formed by a straight line or a curved line.

  According to the oxygen supply adapter for a speech valve according to the present invention, the vent is formed by a straight line or a curve connecting the plurality of curved portions with the shape of the edge portion, thereby reducing wind noise during intake. can do.

A fourth aspect of the present invention is the oxygen supply adapter for a speech valve according to any one of the first to third aspects, wherein the speech valve oxygen supply adapter is configured by a C-type arm and is capable of gripping the outer periphery of the speech valve. And a third wall portion .

According to the oxygen supply adapter for a speech valve according to the present invention, since the third wall portion configured by the C-type arm and capable of gripping the outer periphery of the speech valve is provided , which direction is arranged on the outer periphery of the speech valve cylinder It can be mounted even from the outside and can be easily and efficiently attached to the speech valve.

  According to the oxygen supply adapter for a speech valve according to the present invention, the oxygen blown out from the oxygen supply pipe is suppressed from flowing from the intake port toward the outer periphery, and the oxygen concentration of the air sucked from the intake port is appropriate. Secured. As a result, the patient can inhale comfortably.

It is a figure which shows schematic structure of the tracheostomy tube set to which the oxygen supply adapter which concerns on one Embodiment of this invention is applied, (a) is a front view, (b) is a side view. It is a figure explaining schematic structure of the oxygen supply adapter concerning one embodiment, (a) is a perspective view which looked at the state where the oxygen supply adapter was attached to a speech valve, (b) is a top view of an oxygen supply adapter, c) is a perspective view of the oxygen supply adapter viewed from the side. It is a figure explaining the outline | summary of the state which applied the tracheostomy tube set to which the oxygen supply adapter which concerns on one Embodiment is applied, (a) is a longitudinal cross-sectional view, (b) is a figure which shows XX arrow. is there. It is a longitudinal cross-sectional view explaining the effect | action of the state which attached the oxygen supply adapter to the speech valve which concerns on one Embodiment. It is a figure explaining the outline of the effect | action of the state which attached the oxygen supply adapter which concerns on one Embodiment, (a) is a longitudinal cross-sectional view explaining an inhalation state, (b) is a longitudinal cross-sectional view which shows an expiration state. It is a figure explaining the structure which combined the oxygen supply adapter and speech valve which were used in order to confirm the effect of this invention, (a) is a structure based on the Example of this invention, (b) is a comparison. (C) is a figure which shows the structure which concerns on the comparative example 2 regarding the structure which concerns on Example 1. FIG. It is a figure which shows schematic structure of the oxygen concentration measuring apparatus which measures the oxygen concentration of the inhalation regarding the structure which combined the oxygen supply adapter and speech valve which concern on this invention. It is a figure which shows schematic structure of the intake resistance measuring apparatus which measures the intake resistance regarding the structure which combined the oxygen supply adapter and speech valve which concern on this invention. It is a figure which shows the relationship between the opening area ratio of the structure which combined the oxygen supply adapter and speech valve which concern on this invention, the oxygen concentration of intake air, and intake resistance.

Hereinafter, a speech valve oxygen supply adapter (hereinafter referred to as an oxygen supply adapter) according to the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a schematic configuration of a tracheostomy tube set 1 to which an oxygen supply adapter 30 according to an embodiment of the present invention is applied. FIG. 1 (a) is a front view, and FIG. 1 (b) is a side view. In the figure, reference numeral 1 denotes a tracheostomy tube set, reference numeral 10 denotes a tracheostomy tube, reference numeral 20 denotes a speech valve, and reference numeral 30 denotes an oxygen supply adapter.

  2A and 2B are diagrams for explaining a schematic configuration of the oxygen supply adapter 30. FIG. 2A is a perspective view of a state in which the oxygen supply adapter 30 is attached to the speech valve 20, and FIG. 30 is a plan view, and FIG. 10C is a perspective view of the oxygen supply adapter 30 as viewed from the side.

  As shown in FIG. 1, the tracheostomy tube set 1 includes a tracheostomy tube 10, a speech valve 20, and an oxygen supply adapter 30.

  The tracheostomy tube 10 includes, for example, a cannula 14 provided with a connecting wall 13 at the outer periphery of one end of a bending tube 12 inserted into the trachea, and a left and right foldable supported by the cannula 14 can be folded. A fixing plate 15, a cuff 16, and a tube 17 are provided. In this embodiment, the bending tube 12 is formed with a ventilation window 18.

  The cuff 16 is provided at, for example, an end portion of the bending tube 12 on the trachea insertion side, and inflates like a balloon in the trachea so that air taken into the lungs always passes through the bending tube 12. is there.

  The tube 17, for example, supplies a gas such as air to expand the inside of the cuff 16, or discharges the air or the like in the cuff 16 and contracts it, and discharges the secretion fluid accumulated in the trachea to the outside. It includes a discharge tube and the like.

The speech valve 20 includes a cylindrical body 21 and a check valve 25, and is detachably connectable to the connecting wall portion 13 of the tracheostomy tube 10.
The cylindrical body 21 includes a cylindrical small-diameter portion 21a formed in a cylindrical shape and positioned on the tracheostomy tube 10 side, a cylindrical large-diameter portion 21b formed integrally connected to the cylindrical small-diameter portion 21a, and a coupling member. It has a joint portion 22 and a check valve locking portion 23.

The cylindrical large-diameter portion 21b is formed in a cylindrical shape concentric with the cylindrical small-diameter portion 21a, and an intake port 24 is opened on the outer front side.
Further, a check valve locking portion 23 for locking the central portion of the check valve 25 is formed at the center of the intake port 24, and the check valve locking portion 23 is formed on the cylindrical large diameter portion 21b. It is supported by six support columns 23 a extending from the inner periphery toward the center of the intake port 24.

  The connection engaging portion 22 is formed to protrude in the circumferential direction on the outer periphery of the cylindrical small-diameter portion 21a, and by engaging with an engaged portion formed in the circumferential direction on the inner periphery of the connection wall portion 13, A speech valve 20 is connected to the tracheostomy tube 10.

  The check valve 25 is made of, for example, an elastic material such as silicone rubber formed in a circular sheet shape. In the case of inhalation, the inhalation port 24 is opened and inhalation passes through the inhalation port 24. In the case of exhalation, the inhalation port 24 is closed and the exhalation is blocked.

  2 and 3, the oxygen supply adapter 30 is, for example, an oxygen supply pipe 31 that supplies oxygen to the intake port 24 and an outer front side of the intake port 24 so as to surround an edge of the intake port 24. And a C-shaped arm (third wall) 38 for connecting the first wall 32 to the speech valve 20, and the intake port 24 of the speech valve 20. It is possible to supply oxygen to the intake port 24.

  The oxygen supply pipe 31 has an oxygen supply passage 31 a formed therein, and is connected to the outer periphery of the first wall portion 32, and the oxygen supply passage 31 a opens on the inner peripheral surface of the first wall portion 32. By supplying oxygen supplied from an oxygen supply source (not shown) to the inner peripheral side of the first wall portion 32, oxygen is supplied to the intake port 24 of the speech valve 20.

The first wall portion 32 has, for example, an outer edge portion that is connected to the edge portion of the intake port 24 of the speech valve 20 on the outer peripheral side, bulges from the outer edge portion, rises forward from the intake port 24, and takes in intake air. It has a bulging wall portion (second wall portion) 32a extending to the inner peripheral side of the mouth 24, and an opening 34 is formed at the front side edge portion of the bulging wall portion 32a.
The first wall portion 32 extends toward the front side of the air inlet 24 to the same height as the air outlet 31b of the oxygen supply pipe 31 or a position higher than the air outlet. Here, extending to a position higher than the air outlet 31 b of the oxygen supply pipe 31 means that the first wall portion 32 extends to a position farther from the air inlet 24 than the air outlet 31 b of the oxygen supply pipe 31. Say.

  In this embodiment, the opening 34 is constituted by, for example, three vent holes 35 that are divided by a partition wall portion 33 extending inward from the upper inner periphery of the bulging wall portion 32a. The mouths 35 are arranged symmetrically at the center of the first wall portion 32, respectively.

  The opening 34 has an opening area ratio of 45% to 100% with respect to the area of the intake port 24 of the speech valve. Here, the area of the intake port 24 refers to a region indicated by cross hatching in FIG. 3B. In addition to the area of the intake air flow path, for example, the check valve locking portion 23 and a support for holding the check valve locking portion 23 are used. It refers to the area including the pillar 23a.

Further, for example, as shown in FIG. 3B, the support column 23a and the partition wall 33 are formed at positions that do not overlap each other when viewed in the direction of arrows XX. More specifically, both ends of the support column 23a and both ends of the partition wall portion 33 overlap in the up-and-down (intake circulation) direction, and both ends of the support column 23a and both ends of the partition wall portion 33 overlap to form a portion therebetween. When parallel in the vertical direction, there is a tendency to generate wind noise like a whistle, so it is preferable that the support column 23a and the partition wall portion 33 do not overlap in the vertical direction at least at one end.
Here, FIG.3 (b) is a figure which shows the XX arrow shown to Fig.3 (a). With such a configuration, wind noise generated when the air is sucked through the air inlet 24 is suppressed.

The vent 35 has, for example, a curved portion 35a, a curved portion 35b, and a curved portion 35c, each of which has a substantially parabolic shape. The curved portion 35a, the curved portion 35b, and the curved portion The portions 35c are each formed by a gentle curve.
The curved portion 35a, the curved portion 35b, and the curved portion 35c may be connected by a straight line or a combination of a straight line and a curved line to form an edge, or the edge may be formed by other shapes. May be.

  The C-shaped arm 38 is connected to the outer periphery of the second wall portion 32 via a support wall portion 39, and is configured by two arms that are elastic and can be moved toward and away from each other. The outer periphery of the small diameter portion 21a can be gripped.

  Next, with reference to FIGS. 3 to 5, the operation in a state where the oxygen supply adapter 30 is attached to the speech valve 20 will be described. FIG. 3 is a longitudinal sectional view for explaining the operation in a state where the oxygen supply adapter 30 is attached to the speech valve 20.

As shown in FIG. 3, the speech valve 20 to which the oxygen supply adapter 30 is attached supplies oxygen (arrow O ₂ ) toward the inside of the bulging wall portion 32a through the oxygen supply path 31a of the oxygen supply pipe 31. Is done.

In the speech valve 20 in a state of not being inhaled, the check valve 25 closes the intake port 24, so that oxygen supplied from the oxygen supply path 31 a has an inner space (opening) of the first wall portion 32. A space formed on the side of the intake port 24 from the portion 34).
Further, in a state where the intake port 24 is closed, oxygen filled in the space inside the first wall portion 32 will eventually flow out of the first wall portion 32 through the opening portion 34.

  FIG. 4 is a diagram for explaining the outline of the usage state by attaching the tracheostomy tube set 1 to which the oxygen supply adapter 30 is applied to the patient K, and FIG. 5 is a speech valve 20 to which the oxygen supply adapter 30 in the usage state is attached. It is a longitudinal cross-sectional view explaining an effect | action.

As shown in FIG. 4, in the tracheostomy tube set 1, the bending tube 12 is inserted into the trachea K1 through a hole formed in the throat of the patient.
The patient's inspiration is sent to the lungs through the tracheostomy tube 10, and exhaled air enters the bending tube 12 from the open end and passes through the window 18 to the vocal cord K2 side.

  Further, when the patient K inhales, as shown in FIG. 5A, the check valve 25 is bent inward of the speech valve 20 by the flow of air by inhalation and the intake port 24 is opened. As a result, oxygen supplied from the oxygen supply path 31a and in the first wall 32 and air from the outside flow in the direction of arrow A and are taken into the trachea K1 of the patient K.

Further, when the patient K exhales, as shown in FIG. 5B, the air due to exhalation flows to the side where the check valve 25 is pressed against the intake port 24, thereby closing the intake port 24. As a result, oxygen supplied from the oxygen supply path 31a stays in the first wall portion 32, and is released to the outside through the opening 34 when the first wall portion 32 is filled.
As the check valve 25 closes the intake port 24, exhaled air flows into the vocal cords via the curved tube 12 and the window 18 as shown in FIG. 4.

According to the oxygen supply adapter 30, the opening area of the opening 43 formed in the first wall portion 32 has an opening area ratio of 45% with respect to the opening of the intake port 24 of the speech valve 20. Therefore, it is possible to prevent oxygen supplied from the oxygen supply pipe 31 from flowing out to ensure an appropriate concentration of oxygen for intake air, and to suppress an increase in intake resistance during intake. Can be inhaled.
As a result, the patient K can inhale comfortably even when using the speech valve 20 to which the oxygen supply adapter 30 is applied.

  Further, according to the oxygen supply adapter 30, since the opening portion 34 is constituted by the three vent holes 35, the vent hole 35 and the partition wall portion 33 can be stably arranged to perform stable intake.

  Moreover, according to the oxygen supply adapter 30, the shape of the edge part of the vent hole 35 has the three curved parts 35a, the curved part 35b, and the curved part 35c, and the curved part 35a, the curved part 35b, and the curved part 35c. Since the edge part which connects between is formed by the gentle curve, the wind noise in intake can be reduced.

  Further, according to the oxygen supply adapter 30, since the C-type arm 38 is provided, the oxygen supply adapter 30 can be easily and efficiently attached to the speech valve 20 by gripping the outer periphery of the speech valve 20.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.
For example, in the above embodiment, the case where the bulging wall portion 32a is formed on the first wall portion 32 has been described, but the bulging wall portion 32a is not formed on the first wall portion 32. You can also

  Moreover, in the said embodiment, when the opening part which has the opening area ratio of 45% of the inlet port 24 with respect to the outer side of the inlet port 24 of the speech valve 20 is formed in the 1st wall part 32. However, the opening area ratio of the opening 34 with respect to the intake port 24 may be arbitrarily set within a range of 45% to 100%, for example.

In the above embodiment, the three partition walls 33 divide the opening into the three vent holes 34, and the partition wall 33 is disposed at a position that does not overlap the six support pillars 23 a that cross the intake port 24. However, a part or all of them may overlap each other.
In the above embodiment, the case where the opening 34 of the oxygen supply adapter 30 is configured by the three vent holes 35 has been described. For example, one, two, or more than three vent holes are provided. You may comprise the opening part 34 by.

  Moreover, in the said embodiment, although the vent hole 35 demonstrated the case where it had several curved part 35a, 35b, 35c, the edge part corresponding to the curved part 35a, 35b, 35c of the vent hole 35 is a curved part. Whether or not can be set arbitrarily.

  Moreover, in the said embodiment, although the edge part which connects between the curve parts 35a, 35b, 35c was each demonstrated with the gentle curve, the curve parts 35a, 35b, 35c (or corner | angular part) were demonstrated. It is possible to arbitrarily set whether the space between the folded edges) is a straight edge or an edge formed by a straight line and a curved line.

  In the above embodiment, the case where the oxygen supply adapter 30 includes the C-type arm 38 that grips the outer periphery of the speech valve 20 has been described. However, the attachment to the speech valve 20 may be the C-type arm 38 or other types. It can be arbitrarily set whether to use the means.

  In the above embodiment, the case where the tracheostomy tube is applied to a single-tube tracheostomy tube 10 as shown in FIG. 1 has been described. However, the curved tube 12 of the tracheostomy tube 10 is an outer cannula. Also, the present invention may be applied to a double tube system in which an inner cannula made of a thin curved tube is inserted into and connected to an outer cannula.

  Further, in the above embodiment, the case where the ventilation window 18 is formed in the curved tube 12 of the tracheostomy tube 10 has been described, but the present invention may be applied to a windowless window in which the window 18 is not formed. It is also possible to arbitrarily set whether or not the cuff 16 is provided.

Next, the effect of the present invention will be described with reference to FIGS. 6 to 9 by taking the oxygen concentration and the intake resistance of the intake air as examples.
FIGS. 6A and 6B are diagrams for explaining a structure in which an oxygen supply adapter and a speech valve according to the present invention are combined. FIG. 6A is a structure according to an embodiment of the present invention, and FIG. (C) is a figure which shows the structure which concerns on the comparative example 2. FIG.

As shown in FIG. 6A, the oxygen supply adapter 30 according to the embodiment of the present invention has a first wall portion 32 (or the same height as the air outlet 31b of the oxygen supply pipe) around the intake port 24. The first wall 32 and the bulging wall 32a) are enclosed.
The oxygen supply adapter 130 according to Comparative Example 1 covers the entire front surface of the air inlet 24 of the speech valve 20 with the covering wall portion 131, and has an intake air of about 1 mm between the covering wall portion 131 and the peripheral edge portion of the air inlet 24. The gap 34a for use is formed.
In the oxygen supply adapter 130C according to Comparative Example 2, the front surface of the intake port 24 of the speech valve 20 is opened over the whole (opening ratio 100%), and the edge of the intake port 24 is located near the outlet 31b of the oxygen supply pipe 130C. The wall portion 132 is formed over about 180 °, and the front side of the outlet 31b is open over about 180 °.

FIG. 7 is a diagram showing a schematic configuration of an oxygen concentration measuring device 50 that measures the oxygen concentration of intake air with respect to a configuration in which the speech valve 20 and the oxygen supply adapters 30, 130, and 130C are combined.
The oxygen concentration measuring device 50 includes a ventilator 51, an oxygen concentration sensor 52, a flow meter 53, a mass flow controller 54, a valve 55, and an oxygen concentration measuring device 57.

  The ventilator 51, the oxygen concentration sensor 52, the flow meter 53, and the mass flow controller 54 are arranged in series, and the test comprising the components according to the examples and the comparative examples 1 and 2 between the flow meter 53 and the mass flow controller 54. A piece TP is disposed, the tracheostomy tube side of the test piece TP is connected to the flow meter 53, and an oxygen supply pipe of the test piece TP is connected to the mass flow controller 54. In addition, the valve 55 is arranged in parallel with the test piece TP, and is configured so that exhalation is released.

  Then, while supplying oxygen to the test piece TP by the mass flow controller 54 and confirming with the flow meter 53, air is passed through the test piece TP by the ventilator 51 (corresponding to respiration), and the oxygen concentration at the time of inhalation is determined. The oxygen concentration sensor 52 detected and measured by the oxygen concentration measuring device 57.

FIG. 8 is a diagram showing a schematic configuration of an intake resistance measurement device 60 that measures intake resistance in intake air for a configuration in which the speech valve 20 and the oxygen supply adapters 30, 130, and 130C are combined.
The intake resistance measurement device 60 includes a suction pump 61, a flow meter 62, a pressure sensor 63, and a flow rate adjustment valve 65.

  The suction pump 61 and the flow meter 62 are arranged in series, and the tracheostomy tube side of the test piece TP made of the structure according to Examples 1 and 2 is connected to the flow meter 62, and the pressure of the air flowing into the flow meter 62 is adjusted. The intake resistance was calculated by measuring with the pressure sensor 63.

FIG. 9 is a diagram showing the relationship between the opening area ratio of the structures according to the examples and the comparative examples 1 and 2 measured by the apparatus shown in FIGS. 7 and 8, the oxygen concentration of the intake air, and the intake resistance. In FIG. 9, the horizontal axis represents the opening area ratio (%), the vertical axis represents the intake oxygen concentration (%) on the left side, and the pressure loss (Pa) related to the intake resistance on the right side.
In FIG. 9, (◇) and (◯) indicate the oxygen concentration and intake resistance according to the example, and (♦) and (●) indicate the oxygen concentration and intake resistance according to the comparative example. In Example 1, 100% of the aperture ratio indicates Comparative Example 2.

  As shown in FIG. 9, the oxygen concentration in the intake air is 33% in Comparative Example 1 and 30% in Comparative Example 2, whereas in the Example according to the present invention, it is 37% at an opening area ratio of 100%. Yes, it is improved by 12% (37% / 33%) compared to 30% of Comparative Example 1, and increased by 23% (37% / 30%) or more compared with 30% of Comparative Example 2, which has a great effect. It was confirmed that it was obtained.

  As shown in FIG. 9, the intake resistance is 46 (Pa) in Comparative Example 1, whereas in the example according to the present invention, the opening area ratio is 2 (Pa) at an opening area ratio of 100%, and the opening area ratio is 45%. However, it was 46 (Pa), and it was confirmed that it was the same level as Comparative Example 1.

Moreover, according to FIG. 9, when the bulging wall part (second wall part) 32a is not formed (opening area ratio 100%), it can be confirmed that both the oxygen concentration and the intake resistance are very good. It was.
Moreover, when forming the bulging wall part 32a, the effect superior to the comparative example 1 is acquired by setting it as 45% or more of opening area ratios. Further, for example, by setting the opening area ratio to 55%, the oxygen concentration of the intake air is 41%, which is improved by 24% compared to 33% of the comparative example 1, and the intake resistance is 23 (Pa). Compared with 46 (Pa) of Example 1, it was possible to reduce by 50%, and it was confirmed that it was extremely suitable.

  According to the oxygen supply adapter for a speech valve according to the present invention, an increase in intake resistance can be suppressed while ensuring an appropriate oxygen concentration for intake, and the intake can be comfortably performed.

DESCRIPTION OF SYMBOLS 1 Tracheostomy tube set 10 Tracheostomy tube 20 Speech valve 21 Tubular body 21a Tubular small diameter part 21a Cylindrical large diameter part 22 Connection engagement part 23 Check valve locking part 23a Support column 24 Inlet 25 Check valve 30 Oxygen Supply adapter (oxygen supply adapter for speech valve)
31 Oxygen supply pipe 31a Oxygen supply path 31b Outlet 32 First wall 32a Swelling wall (second wall)
33 Partition wall 34 Vent (opening)
35 Vent 35a, 35b, 35c Curve 38 C-type arm (third wall)

Claims (4)

A speech valve oxygen supply adapter attached to the speech valve for supplying oxygen to the inlet of the speech valve,
An oxygen supply pipe for supplying oxygen to the intake port;
A first wall portion that suppresses oxygen blown from the oxygen supply pipe from flowing from the intake port toward the outer periphery; and
The first wall portion is
Surrounding the periphery of the intake port and extending to the front side of the intake port to the same height as the blowout port of the oxygen supply pipe or a position higher than the blowout port, a second wall portion having an opening aperture ratio is 45% or more with respect to the intake port extends toward the circumferential side, wherein the opening is divided into a plurality of vents by a plurality of partition walls, The plurality of partition walls are connected to an adjacent partition wall at the center of the opening via a curved portion and connected to the second wall and the curved portion on the outer peripheral side of the opening. oxygen supply adapter for speech valve, characterized in that there. The oxygen supply adapter for a speech valve according to claim 1,
The oxygen supply adapter for a speech valve, wherein an opening ratio with respect to the intake port is 55% or more. The oxygen supply adapter for a speech valve according to claim 1 or 2,
The vent is
The oxygen supply adapter for a speech valve, wherein the edge portion is formed by a plurality of curved portions and straight lines or curved lines connecting the curved portions. The oxygen supply adapter for a speech valve according to any one of claims 1 to 3,
A speech valve oxygen supply adapter comprising a third wall portion configured by a C-shaped arm and capable of gripping an outer periphery of the speech valve.

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