JP2012170792A - Tracheal cannula - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tracheal cannula for reducing burdens on a nursing person and a patient.SOLUTION: The tracheal cannula 1 includes: a vent tube 10 in a curved circular tube shape; a plurality of projections 16 provided on an inner surface of the vent tube 10; a frame 20 provided near a body outer side opening 12 of the vent tube 10; and a cuff 22 provided near the tracheal side opening 14 of the vent tube 10. In a lumen of the vent tube 10, the plurality of projections 16 are present. The plurality of projections 16 are inclined and arranged so that the tips of the projections are oriented to the body outer side opening 12.

Description

  The present invention relates to a tracheal cannula.

  2. Description of the Related Art Conventionally, for the purpose of securing an airway of a patient with reduced respiratory function, a tracheotomy is performed in which a trachea and an upper skin thereof are incised and a tracheal cannula is inserted into the incised portion. When tracheostomy is intubated by tracheostomy, sputum and secretions (hereinafter referred to as “sputum etc.”) may accumulate in the trachea. Various techniques for removing such sputum etc. Is being studied.

  For example, Patent Literature 1 discloses a suction line that has a suction tube that can be inserted into a tracheal cannula, a continuous suction line that is connected to the tracheal cannula and continuously sucks at a suction pressure lower than the suction pressure of the suction line. And a suction device connected to the continuous suction line and the suction line as needed. The end of the continuous suction line is located at the lung side end of the tracheal cannula, so that sputum or the like accumulated near the lung side end of the tracheal cannula can be sucked and removed continuously. In addition, when the suction pressure of the continuous suction line cannot be sucked and soot accumulates, the tip of the suction tube can reach the trachea by inserting the suction tube of the suction line into the tracheal cannula at any time. Therefore, soot and the like accumulated in the trachea can be effectively removed by suction.

JP 2010-220717 A

  By the way, when suctioning and removing wrinkles and the like using a suction tube as in the suction system disclosed in Patent Document 1, it is not easy to suck and remove wrinkles and the like by operating the suction tube by the patient himself. Usually, a person who cares for a patient (hereinafter referred to as “nurse”) operates a suction tube as necessary to remove suction such as sputum.

  However, the work to remove sputum and the like is necessary regardless of the day and night time, and although it depends on the patient's condition, the nurse is often attached to the patient, and the physical burden on the nurse And the mental burden is tremendous. In particular, when the nurse is a family member, the burden is immeasurable because 24 hours 365 days a year, the nurse is always involved. Also, it is not only nurses who feel such a burden. While suffering from the family's deteriorating appearance, the mental distress of patients who cannot live without help from the family is hard to beat.

  Then, this invention is made | formed in view of such a situation, and it aims at providing the tracheal cannula which can reduce a burden of a nurse and a patient.

  The inventors of the present invention have achieved a tracheal cannula capable of discharging sputum and the like in the trachea out of the body in a natural manner without using a nurse's hand as much as possible in achieving the above object, in other words, As a development concept, “self-draining tracheal cannula” was developed. As a result, if a vent tube having a plurality of projections is used as a vent tube constituting the tracheal cannula, the plurality of projections serve as a so-called “return”, and as a result, wrinkles in the trachea are reduced. The inventors have conceived that it can be discharged from the body in a natural manner, and have completed the present invention.

  That is, the tracheal cannula (1) of the present invention is a tracheal cannula including a vent pipe (10) having an external body opening (12) and a trachea side opening (14), A plurality of protrusions (16) are present in the lumen, and the plurality of protrusions (16) are inclined so that the tips of the protrusions are directed toward the outer body opening (12). It is characterized by.

For this reason, according to the tracheal cannula of the present invention, since there are a plurality of protrusions in the lumen of the ventilation tube, when the soot accumulated in the trachea enters the aeration tube by the pressure from the lung, It will be caught by a plurality of protrusions. Further, since the plurality of protrusions are inclined so that the tips of the protrusions are directed toward the outside opening of the body, the protrusions play a role of so-called “returning”, and wrinkles caught on the protrusions in the lung direction. It is possible to suppress the movement. In other words, the sputum or the like that has once entered the tracheal cannula gradually moves toward the outside opening of the ventilation tube by the function of the protrusion and the pressure from the lung, and is finally discharged from the outside opening. The Rukoto. As a result, it has become possible to discharge tracheal sputum etc. out of the body in a natural way without borrowing the hands of the nurse as much as possible, reducing the physical and mental burden of the nurse, It is possible to release from the mental distress that the patient felt. Further, by using the tracheal cannula of the present invention, the frequency of sucking and removing sputum or the like using the suction tube can be greatly reduced, so that the physical burden on the patient can be reduced.
Therefore, the tracheal cannula of the present invention is a tracheal cannula that can reduce the burden on the nurse and the patient.

  The tracheal cannula (2) of the present invention further includes a cuff (22) provided on the outer surface of the vent pipe (30), and the inner diameter (D1) of the trachea side opening (34) It is preferable that it is larger than the pipe inner diameter (D2) at the position where the cuff (22) is provided in the trachea (30).

  In the case of a tracheal cannula with a cuff, by configuring as described above, the distance from the inner wall of the trachea to the tracheal side opening becomes closer, so that wrinkles accumulated in the trachea can easily enter the tracheal cannula, As a result, it is possible to more effectively discharge soot and the like outside the body.

  In the tracheal cannula (1) of the present invention, it is preferable that the inclination angle (α) of the plurality of protrusions (16) is not less than 5 degrees and not more than 85 degrees.

The “inclination angle of the protrusion” is the difference between the reference axis and the central axis of the protrusion arranged at an angle when the axis perpendicular to the tube wall of the vent pipe (normal in the bent portion) is used as the reference axis. The angle to make.
For example, an inclination angle of 0 degree means a protrusion that protrudes perpendicularly to the tube wall of the vent pipe. If the inclination angle is larger than 0 degree and smaller than plus 90 degrees, it means a protrusion that is inclined so that the tip is directed toward the body outside opening. If the inclination angle is smaller than 0 degree and larger than minus 90 degrees, it means a protrusion that is inclined so that the tip is directed toward the trachea side opening.

  In this specification, the inclination angle of the protrusions that are inclined so that the tip is directed toward the opening on the outside of the body is represented by “plus (+)”, and is inclined so that the tip is directed toward the trachea side opening. The inclination angle of the arranged projection is expressed by “minus (−)”.

When the inclination angle of the protrusion is smaller than plus 5 degrees, the role of “return” cannot be sufficiently achieved, and it becomes difficult to suppress movement of the wrinkles caught on the protrusion in the lung direction. On the other hand, when the inclination angle of the protrusion is larger than plus 85 degrees, wrinkles or the like that have entered the tracheal cannula are not easily caught by the protrusion.
On the other hand, according to the tracheal cannula of the present invention, the inclination angle of the plurality of protrusions is not less than 5 degrees and not more than 85 degrees, so that the function as “returning” can be sufficiently exerted, such as It is possible to achieve smooth discharge.

  In the tracheal cannula (1) of the present invention, the protrusion length (L) of the plurality of protrusions (16) is preferably 0.2 mm or more and 3.0 mm or less.

The “projection length of the protrusion” refers to the length from the base to the tip of the protrusion.
If the protrusion length of the protrusion is smaller than 0.2 mm, the wrinkles or the like that have entered the tracheal cannula are not easily caught by the protrusion, and cannot sufficiently fulfill the role of “return”. On the other hand, if the protrusion length of the protrusion is larger than 3.0 mm, the ratio of the protrusion occupying the lumen of the vent pipe increases more than necessary, which may hinder smooth movement of wrinkles and the like in the vent pipe.
On the other hand, according to the tracheal cannula of the present invention, since the protruding length of the plurality of protrusions is 0.2 mm or more and 3.0 mm or less, the function as “returning” can be sufficiently exhibited. It is possible to realize smooth discharge.

  In the tracheal cannula (1) of the present invention, the plurality of protrusions (16) are preferably provided on the inner surface of the vent pipe (10).

  With this configuration, the tracheal cannula can be easily assembled with relatively few parts.

  In the tracheal cannula (1) of the present invention, it is preferable that the vent pipe (10) and the plurality of protrusions (16) are integrally formed based on the same resin material.

  With this configuration, it becomes easy to manufacture a vent pipe provided with a plurality of protrusions, and the manufacturing cost can be reduced.

  In the tracheal cannula (4) according to the present invention, the tracheal cannula (4) is disposed in the pipe of the vent pipe (50), and is a length from the tracheal side opening (54) to the outer body opening (52) in the vent pipe (50). It is also preferable that a rod-shaped member (60) having a length corresponding to the length of the rod-shaped member (60) is further provided on the outer surface of the rod-shaped member (60).

  Even if the rod-shaped member is provided with a plurality of projections without providing a plurality of projections on the vent tube itself, and the rod-shaped member is disposed in the vent tube, there will be a plurality of projections in the lumen of the vent tube. As a result of the protrusion acting as a “return”, it is possible to discharge the phlegm etc. in the trachea out of the body in a natural manner. Further, compared to providing a plurality of protrusions on the inner surface of the vent pipe, it is easier to manufacture the rod-like member disposed in the pipe of the vent pipe after providing the plurality of protrusions on the outer surface of the rod-like member. Thus, the tracheal cannula of the present invention is a tracheal cannula that is relatively easy to manufacture.

  In the tracheal cannula (4) of the present invention, it is preferable that the rod-shaped member (60) and the plurality of protrusions (62) are integrally formed based on the same resin material.

  With this configuration, it becomes easy to manufacture a rod-shaped member provided with a plurality of protrusions, and the manufacturing cost of the tracheal cannula can be reduced.

  In addition, the reference numerals added in parentheses below the wording of each member, etc. described in the claims and in this column (column of means for solving the problems) are the contents described in the claims and this column. It is used for facilitating understanding of the present invention, and does not limit the contents described in the claims and in this section.

The figure shown in order to demonstrate the tracheal cannula 1 which concerns on 1st Embodiment. The elements on larger scale shown in order to demonstrate the processus | protrusion 16. FIG. The figure shown in order to demonstrate the motion of SP etc. which move the inside of the vent pipe. The figure shown in order to demonstrate the tracheal cannula 2 which concerns on 2nd Embodiment. The figure shown in order to demonstrate the tracheal cannula 3 which concerns on 3rd Embodiment. The figure shown in order to demonstrate the tracheal cannula 4 which concerns on 4th Embodiment. The figure shown in order to demonstrate the movement of SP etc. which move the inside of the ventilation pipe | tube 50. FIG.

  Hereinafter, the tracheal cannula of the present invention will be described based on the embodiments shown in the drawings.

[First Embodiment]
Drawing 1 is a figure shown in order to explain tracheal cannula 1 concerning a 1st embodiment. 1A is an external view of the tracheal cannula 1, FIG. 1B is a view for explaining the internal structure of the tracheal cannula 1, and FIG. 1C is an end face of the tracheal side opening 14. FIG. In FIG. 1B, only the cuff 22 portion is shown as a cross-sectional structure. In addition, in FIG. 1C, the protrusion 16 is also illustrated.
FIG. 2 is a partially enlarged view for explaining the protrusion 16.
FIG. 3 is a view for explaining the movement of the spear SP or the like moving in the ventilation pipe 10.

  As shown in FIG. 1, the tracheal cannula 1 according to the first embodiment includes a curved and circular vent tube 10, a plurality of protrusions 16 provided on the inner surface of the vent tube 10, and the outside of the vent tube 10. A frame 20 provided in the vicinity of the opening 12 and a cuff 22 provided in the vicinity of the trachea-side opening 14 of the vent pipe 10 are provided. The tracheal cannula 1 is a so-called single tube type cuffed cannula.

  The ventilation tube 10 has a body outer side opening 12 and a trachea side opening 14. Although description by illustration is abbreviate | omitted, when the tracheal cannula 1 is intubated by tracheotomy, the external opening 12 will be located outside the body (on the skin), and the tracheal opening 14 will be located in the trachea. It becomes. The body outside opening 12 is configured to be connectable to a tube (not shown) connected to the aspirator.

  As shown in FIG. 1B, a plurality of protrusions 16 are present in the lumen (internal space) of the vent pipe 10. In FIG. 1B, only the inside of the vent pipe 10 around the cuff 22 is illustrated, but the protrusion 16 is provided on the inner surface of the vent pipe 10 in the inside other than the cuff 22 peripheral portion. Yes.

  The protrusions 16 are regularly arranged, for example. Specifically, as shown in FIG. 1C, when viewed from the direction along the central axis of the vent pipe 10, the six protrusions 16 are arranged at an arrangement interval of 60 degrees around the central axis. Has been. The six protrusions 16 are arranged as a group on the inner surface of the vent pipe 10 from the trachea side opening 14 toward the outer body opening 12 at equal intervals.

  As shown in FIGS. 2 and 3, the plurality of protrusions 16 are inclined so that the tips of the protrusions face the outer body opening 12. In FIG. 2, an axis A <b> 1 indicated by a one-dot chain line is an axis that passes through the root of the protrusion 16 and is perpendicular to the tube wall of the vent tube 10. An axis A2 indicated by a broken line is a central axis of the protrusion 16 that is inclined. The inclination angle of the protrusion means an angle α formed between the axis A1 and the axis A2. The inclination angle α of the protrusion 16 is set to, for example, plus (+) 45 degrees.

  The protrusion length (length from the base of the protrusion 16 to the tip) L of the plurality of protrusions 16 is set to 1.6 mm, for example. Further, the tip of the protrusion 16 is not sharp and is rounded.

  Both the air pipe 10 and the plurality of protrusions 16 are integrally formed using, for example, PTFE (polytetrafluoroethylene) as a material. In addition, as a material which comprises the vent pipe 10 and the some protrusion 16, the other well-known material excellent in biocompatibility, such as a silicone resin, can be used suitably, for example.

According to the tracheal cannula 1 according to the first embodiment configured as described above, since a plurality of protrusions 16 are present in the lumen of the ventilation tube 10, wrinkles accumulated in the trachea are caused by pressure from the lungs. When entering the ventilation pipe 10, the hooks and the like are caught by the plurality of protrusions 16 (see FIG. 3). Further, since the plurality of protrusions 16 are inclined so that the tips of the protrusions are directed toward the outside body opening 12, the protrusion 16 plays a role of so-called "returning", and so on. Can be prevented from moving in the lung direction. That is, the sputum or the like that has once entered the tracheal cannula 1 gradually moves toward the outside opening 12 of the aeration tube 10 by the function of the protrusion 16 and the pressure from the lungs, and finally the outside opening. It will be discharged from the section 12. As a result, it has become possible to discharge tracheal sputum etc. out of the body in a natural way without borrowing the hands of the nurse as much as possible, reducing the physical and mental burden of the nurse, It is possible to release from the mental distress that the patient felt. In addition, by using the tracheal cannula 1 according to the first embodiment, the frequency of sucking and removing wrinkles and the like using the suction tube can be greatly reduced, so that the physical burden on the patient can be reduced. .
Therefore, the tracheal cannula 1 according to the first embodiment is a tracheal cannula that can reduce the burden on the nurse and the patient.

  According to the tracheal cannula 1 according to the first embodiment, the inclination angle α of the plurality of protrusions 16 is not less than +5 degrees and not more than +85 degrees, so that the function as “return” can be sufficiently exerted, It is possible to achieve smooth discharge of soot and the like.

  According to the tracheal cannula 1 according to the first embodiment, the protruding length L of the plurality of protrusions 16 is not less than 0.2 mm and not more than 3.0 mm, so that the function as “return” can be sufficiently exhibited. It is possible to achieve smooth discharge of soot and the like.

  In the tracheal cannula 1 according to the first embodiment, since the plurality of protrusions 16 are provided on the inner surface of the vent tube 10, the tracheal cannula can be easily assembled with a relatively small number of parts.

  In the tracheal cannula 1 according to the first embodiment, the vent tube 10 and the plurality of projections 16 are integrally formed based on the same resin material, and therefore the vent tube 10 provided with the plurality of projections 16 is provided. Manufacturing becomes easy, and it becomes possible to reduce the manufacturing cost.

[Second Embodiment]
FIG. 4 is a view for explaining the tracheal cannula 2 according to the second embodiment. 4 (a) is an external view of the tracheal cannula 2, FIG. 4 (b) is a view for explaining the internal structure of the tracheal cannula 2, and FIG. 4 (c) is a portion of the tracheal side opening 34. It is an enlarged end view.
In FIG. 4, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The tracheal cannula 2 according to the second embodiment basically has a configuration similar to that of the tracheal cannula 1 according to the first embodiment, but the shape of the vent tube is different from that of the tracheal cannula 1 according to the first embodiment. Different.

  That is, in the tracheal cannula 2 according to the second embodiment, as shown in FIG. 4, the shape of the trachea-side opening 34 of the vent tube 30 spreads in a trumpet shape. Specifically, the tube inner diameter D1 of the trachea-side opening 34 in the vent tube 30 is larger than the tube inner diameter D2 of the vent tube 30 at the position where the cuff 22 is provided.

  As described above, the tracheal cannula 2 according to the second embodiment is different from the tracheal cannula 1 according to the first embodiment in the shape of the ventilating tube, but as in the case of the tracheal cannula 1 according to the first embodiment, Since a plurality of protrusions 36 exist in the lumen of the trachea 30 and the plurality of protrusions 36 are inclined so that the tips of the protrusions are directed toward the outer body opening 32, the first embodiment is used. As in the case of the tracheal cannula 1, the tracheal cannula can reduce the burden on the nurse and the patient.

  In the tracheal cannula 2 according to the second embodiment, the tube inner diameter D1 of the trachea-side opening 34 is larger than the tube inner diameter D2 of the vent tube 30 where the cuff 22 is provided. As a result, the distance from the inner wall of the trachea to the trachea-side opening 34 is reduced, so that soot or the like accumulated in the trachea can easily enter the tracheal cannula 2, and as a result, discharge of soot and the like outside the body is more effective. Can be performed.

  Since the tracheal cannula 2 according to the second embodiment has the same configuration as that of the tracheal cannula 1 according to the first embodiment except that the shape of the vent pipe is different, the tracheal cannula 1 according to the first embodiment has the effect. Of the relevant effects.

[Third Embodiment]
FIG. 5 is a view for explaining the tracheal cannula 3 according to the third embodiment. FIG. 5A is an external view of the tracheal cannula 3, and FIG. 5B is a view for explaining the internal structure of the tracheal cannula 3.
In FIG. 5, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The tracheal cannula 3 according to the third embodiment basically has a configuration similar to that of the tracheal cannula 1 according to the first embodiment. However, the tracheal cannula 1 according to the first embodiment is not provided with a cuff. Is different.

  As shown in FIG. 5, the tracheal cannula 3 according to the third embodiment is a single tube type cannula without a cuff, and is a so-called speech cannula. Although a detailed description is omitted, the outside opening 42 of the vent pipe 40 is configured to be connectable with a speech valve (not shown). A side hole 48 that functions as an air hole at the time of expiration is formed in a part of the ventilation tube 40.

  As described above, the tracheal cannula 3 according to the third embodiment differs from the tracheal cannula 1 according to the first embodiment in that it does not include a cuff, but is similar to the case of the tracheal cannula 1 according to the first embodiment. Since the plurality of protrusions 46 are present in the lumen of the vent pipe 40, and the plurality of protrusions 46 are inclined so that the tips of the protrusions face the outer body opening 42, the first embodiment As in the case of the tracheal cannula 1 according to the embodiment, the tracheal cannula can reduce the burden on the nurse and the patient.

  Since the tracheal cannula 3 according to the third embodiment has the same configuration as the tracheal cannula 1 according to the first embodiment except that the tracheal cannula 1 according to the first embodiment is not provided with a cuff, the effect of the tracheal cannula 1 according to the first embodiment is obtained. Of which, it has the relevant effect.

[Fourth Embodiment]
FIG. 6 is a view for explaining the tracheal cannula 4 according to the fourth embodiment. 6A is an external view of the tracheal cannula 4, FIG. 6B is a view for explaining the internal structure of the tracheal cannula 4, and FIG. 6C is an end face of the tracheal side opening 54. FIG. In addition, in FIG.6 (c), the rod-shaped member 60 and the protrusion 62 are also shown in figure.
FIG. 7 is a view for explaining the movement of the spear SP or the like that moves in the ventilation pipe 50.
In FIG. 6, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The tracheal cannula 4 according to the fourth embodiment basically has a configuration similar to that of the tracheal cannula 1 according to the first embodiment, but is further provided with a rod-shaped member and provided with a plurality of protrusions. The member is different from the tracheal cannula 1 according to the first embodiment.

  That is, as shown in FIG. 6, the tracheal cannula 4 according to the fourth embodiment includes a curved circular tubular ventilation tube 50, a rod-shaped member 60 disposed in the tube of the ventilation tube 50, and an outer surface of the rod-shaped member 60. A plurality of projections 62 provided on the outer side of the vent pipe 50, a frame 20 provided near the body outside opening 52 of the vent pipe 50, and a cuff 22 provided near the trachea side opening 54 of the vent pipe 50.

  The rod-shaped member 60 has a length corresponding to the length from the trachea-side opening 54 to the body-side opening 52 in the vent pipe 50, and is curved in the same manner as the vent pipe 50. Has the shape. The rod-shaped member 60 is a rod-shaped member having a circular cross section, for example.

  The rod-shaped member 60 is fixed inside the vent tube 50 by a fixing member (not shown) so that the rod-shaped member 60 is positioned along the central axis of the vent tube 50.

  As shown in FIG. 6B, a plurality of protrusions 62 are present in the lumen (internal space) of the vent pipe 50. 6B shows only the inside of the vent pipe 50 around the cuff 22, but the protrusion 62 is provided on the outer surface of the rod-like member 60 in the inside other than the cuff 22 around. Yes.

  The protrusions 62 are regularly arranged, for example. Specifically, as shown in FIG. 6C, when viewed from the direction along the central axis of the vent pipe 50, the four protrusions 62 are arranged at an arrangement interval of 90 degrees around the central axis. Has been. The four protrusions 62 are arranged as a group on the outer surface of the rod-shaped member 60 from the trachea side opening 54 toward the outer body opening 52 at equal intervals.

  In addition, since the inclination angle and protrusion length of the plurality of protrusions 62 are the same as those of the protrusion 16 described in the first embodiment, detailed description thereof is omitted.

  Both the rod-shaped member 60 and the plurality of protrusions 62 are integrally formed using, for example, PTFE (polytetrafluoroethylene) as a material. In addition, as a material which comprises the rod-shaped member 60 and the some protrusion 62, other well-known materials excellent in biocompatibility, such as a silicone resin, can be used suitably, for example.

  As described above, the tracheal cannula 4 according to the fourth embodiment differs from the tracheal cannula 1 according to the first embodiment in that it further includes a rod-like member and a member provided with a plurality of protrusions. As in the case of the tracheal cannula 1 according to the embodiment, a plurality of projections 62 are present in the lumen of the ventilation tube 50, and the plurality of projections 62 are arranged so that the tips of the projections are close to the outer body opening 52. Since it is inclined so as to face, it becomes a tracheal cannula capable of reducing the burden on the nurse and the patient as in the case of the tracheal cannula 1 according to the first embodiment.

  The tracheal cannula 4 according to the fourth embodiment further includes the above-described rod-shaped member 60, and the plurality of protrusions 62 are provided on the outer surface of the rod-shaped member 60. That is, unlike the tracheal cannulas 1 to 3 according to the first to third embodiments, a plurality of protrusions 62 are provided on the rod-shaped member 60 without providing the plurality of projections on the vent tube itself, and the rod-shaped member 60 is placed inside the vent tube 50. Even if it is disposed in the air duct 50, the plurality of protrusions 62 exist in the lumen of the vent pipe 50. As a result of the plurality of protrusions 62 acting as a "return", the trachea and the like in the trachea are naturally discharged out of the body. (See FIG. 7). Further, compared to providing a plurality of protrusions on the inner surface of the vent pipe, it is more producible to dispose the rod-like member 60 in the pipe of the vent pipe 50 after providing the plurality of protrusions 50 on the outer surface of the rod-like member 60. Therefore, the tracheal cannula 4 according to the fourth embodiment is a tracheal cannula that is relatively easy to manufacture.

  In the tracheal cannula 4 according to the fourth embodiment, since the rod-shaped member 60 and the plurality of protrusions 62 are integrally formed based on the same resin material, the rod-shaped member 60 provided with the plurality of protrusions 62 is provided. Manufacture is facilitated, and the manufacturing cost of the tracheal cannula can be reduced.

  The tracheal cannula 4 according to the fourth embodiment has the same configuration as that of the tracheal cannula 1 according to the first embodiment except that a bar-like member is further provided and a member provided with a plurality of protrusions is different. Therefore, it has the applicable effect as it is among the effects of the tracheal cannula 1 according to the first embodiment.

  As mentioned above, although the tracheal cannula of this invention was demonstrated based on said each embodiment, this invention is not limited to said each embodiment, It implements in a various aspect in the range which does not deviate from the summary. For example, the following modifications are possible.

(1) In each of the above embodiments, the case where a plurality of protrusions are regularly arranged in the lumen of the vent pipe has been described as an example. However, the present invention is not limited to this, and a plurality of protrusions are provided. The protrusions may be arranged irregularly. Also, the inclination angle and protrusion length of the protrusions are not necessarily the same in all protrusions, and protrusions with different inclination angles and different protrusion lengths may be regularly or irregularly arranged.

(2) In the first to third embodiments, when viewed from the direction along the central axis of the vent pipe, the six protrusions are arranged at an arrangement interval of 60 degrees around the central axis. Although the case has been described as an example, the present invention is not limited to this, and five or less or seven or more protrusions may be arranged at equal intervals or at unequal intervals. Similarly in the fourth embodiment, three or less or five or more protrusions may be arranged at equal intervals or at unequal intervals.

(3) In each of the above embodiments, the tip of each protrusion is not pointed but rounded, but the present invention is not limited to this, and the tip of each protrusion is sharply pointed. Also good.

(4) In the first to third embodiments, the case where both the ventilation pipe and the plurality of protrusions are integrally formed based on the same material has been described as an example. However, the present invention is not limited to this. It is not something. The vent pipe and the plurality of protrusions may be made of different materials, for example, a plurality of protrusions may be provided after the vent pipe is formed. Similarly, in the fourth embodiment, the rod-shaped member and the plurality of protrusions may be made of different materials. For example, a plurality of protrusions may be provided after the rod-shaped member is formed.

(5) In the said 2nd Embodiment, although the trachea side opening part 34 illustrated and demonstrated the vent pipe 30 expanded in the trumpet shape, this invention is not limited to this. For example, a vent pipe having a structure in which the shape of the trachea-side opening changes depending on the expanded state of the cuff may be used. That is, before the cuff is inflated, the tube inner diameter D1 of the trachea-side opening in the vent tube is the same as the tube inner diameter D2 at the position where the cuff is provided in the vent tube. The vent tube may be configured such that the inner diameter D1 of the trachea side opening gradually increases in accordance with the amount of expansion of the trachea, and the trachea side opening expands in a trumpet shape. In this case, there is an effect that it is easy to intubate when the tracheal cannula is intubated into the body.

(6) In the fourth embodiment, a rod-shaped member having a circular cross section is illustrated as an example of the rod-shaped member. However, the present invention is not limited to this, and the rod-shaped member having an elliptical cross section or a large number of cross-sections is used. It may be a square member (for example, a quadrangle).

(7) In the fourth embodiment, the case where a plurality of protrusions are not provided on the inner surface of the vent pipe 50 has been described as an example, but the present invention is not limited to this, and the vent pipe 50 A plurality of protrusions may be provided on the inner surface. That is, a plurality of protrusions may be provided on both the outer surface of the rod-shaped member and the inner surface of the vent pipe.

(8) The present invention can be applied not only to a so-called single tube type tracheal cannula but also to a double tube type tracheal cannula including an inner tube and an outer tube. In the case of a double-tube type tracheal cannula, for example, by providing a plurality of protrusions inside the inner tube, it is possible to obtain the same effect as the present invention.

(9) The present invention is applicable not only to a tracheal cannula that is intubated when a tracheotomy is performed, but also to an endotracheal tube that is orally or nasally intubated for the purpose of discharging sputum or the like. is there.

  The tracheal cannula of the present invention can be used as a cannula for insertion into the trachea for the purpose of securing the airway and the like.

1, 2, 3, 4 Tracheal cannula 10, 30, 40, 50 Venting pipe 12, 32, 42, 52 External opening 14, 34, 44, 54 Tracheal opening 16, 36, 46, 62 Protrusion 20 Frame 22 cuff 48 side hole 60 rod-like member A1 axis A2 perpendicular to the tube wall center axis D1 of the projection tube inner diameter D2 of the trachea side opening portion tube inner diameter L of the vent pipe where the cuff is provided projection length SP of protrusion α Inclination angle of protrusion

Claims (8)

A tracheal cannula comprising a vent tube (10) having an external body opening (12) and a tracheal side opening (14),
In the lumen of the vent pipe (10), there are a plurality of protrusions (16),
The tracheal cannula (1), wherein the plurality of protrusions (16) are inclined so that tips of the protrusions are directed toward the outer body opening (12). The tracheal cannula according to claim 1,
A cuff (22) provided on the outer surface of the vent pipe (30);
The tracheal cannula (D1) of the trachea side opening (34) is larger than the pipe inner diameter (D2) of the vent pipe (30) where the cuff (22) is provided. 2). The tracheal cannula according to claim 1 or 2,
The tracheal cannula (1), wherein the inclination angle (α) of the plurality of protrusions (16) is not less than 5 degrees and not more than 90 degrees. The tracheal cannula according to any one of claims 1 to 3,
The tracheal cannula (1), wherein the protrusion length (L) of the plurality of protrusions (16) is 0.2 mm or more and 3.0 mm or less. In the tracheal cannula according to any one of claims 1 to 4,
The tracheal cannula (1), wherein the plurality of protrusions (16) are provided on an inner surface of the vent pipe (10). The tracheal cannula according to claim 5,
The tracheal cannula (1), wherein the vent pipe (10) and the plurality of protrusions (16) are integrally formed based on the same resin material. In the tracheal cannula according to any one of claims 1 to 4,
A rod-shaped member (with a length corresponding to the length from the trachea side opening (54) to the outside body opening (52) in the vent pipe (50), which is disposed in the pipe of the vent pipe (50). 60),
The tracheal cannula (4), wherein the plurality of protrusions (62) are provided on an outer surface of the rod-shaped member (60). The tracheal cannula according to claim 7,
The tracheal cannula (4), wherein the rod-shaped member (60) and the plurality of protrusions (62) are integrally formed based on the same resin material.

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