JP2013162858A - Tracheal cannula - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tracheal cannula having no possibility that tracheal mucosa is sucked by a phlegm sucking opening for sucking phlegm.SOLUTION: A tracheal cannula includes a respiration tube for sending and discharging respiration air, and a sucking tube for sucking phlegm. In the cannula, a phlegm sucking opening communicating to the respiration tube is provided on a wall surface opposite to a wall surface facing the tracheal mucosa at a distal end of the sucking tube.

Description

The present invention relates to a tracheostomy tube inserted through an incision hole formed in a trachea of a patient by tracheostomy surgery or an artificial respiration cannula inserted from the mouth. This relates to a tracheal cannula that eliminates the risk of bleeding.

Conventionally, patients who are unable to breathe themselves have inserted a tracheal cannula through an incision opened in the mouth or front neck, and attached a ventilator to help the patient breathe. A large amount of sputum appears in the mucous membrane of the trachea. Therefore, the tracheal cannula is hermetically sealed to increase the internal pressure of the respiratory tube and the trachea when the respiratory tube and the suction tube for sucking the soot accumulated in the trachea and the respiratory tube for sending and discharging respiratory air. Cuffs (inflated with air to close the trachea other than the respiratory tract).

By the way, as for the suction tube for sucking the sputum, there have been some proposals in the past because there is a risk that the suction port of the sputum sucks the tracheal mucosa to cause mucosal damage or bleeding.
These are introduced in order in FIG. FIG. 2 is an example of a conventional tracheal cannula.
In 2-A, Patent Document 1 is an example in which a distal end portion 201 of a tracheal cannula 200 includes a respiratory tube opening 202A and a sputum suction opening 203A. In this example, when the patient is lying on the side, the sputum accumulates in the lower part of the bend of the tracheal cannula 200, whereas the sputum suction opening 203A is provided on the side surface, so that sputum suction is not efficient.
In 2-B, Patent Document 2 proposes that a fistula suction opening 203 </ b> A is provided in a portion under the bend (convex side) of the tracheal cannula 200 in order to avoid the disadvantage of the example of 2-A.
In this figure, the tracheal cannula 200 includes a respiratory tube 202 and a suction tube 203, and a sputum suction opening 203A is opened at the tip of the suction tube 203 and below (convex side) the bend of the tracheal cannula 200. ing. In addition, a cuff 204 and an air supply device 205 for inflating the cuff 204 are drawn. With this proposal, sputum can be sucked efficiently, but the risk of sucking the tracheal mucosa directly has increased.
In 2-C, for this reason, in the same Patent Document 2, in addition to providing a sputum suction opening 203A in the lower (convex side) portion of the tracheal cannula 200, there is a second gap between the respiratory tube 202 and the suction tube 203. A proposal with a second sputum suction opening 203B was presented. Since the second sputum suction opening 203B is present, the force for directly sucking the tracheal mucosa by the sputum suction opening 203A is weakened. Nevertheless, it was seen that when the second sputum suction opening 203B was closed by the scissors, the tracheal mucosa was directly sucked.
It can be understood from the example 2-E that the tracheal mucosa may be directly sucked in accordance with the open state of the holes in the sputum suction opening 203A and the second sputum suction opening 203B.
In 2-E, the sputum suction opening 203A is located on the side farther from the tip than the second sputum suction opening 203B, but the tracheal mucosa is directly sucked, and the tracheal mucosa 206 becomes the sputum suction opening 203A. The entrance of the suction tube 203 was blocked, and the suction force of the suction tube 203 was entirely applied to the tracheal mucosa 206, and the meaning of the presence of the second sputum suction opening 203B was completely eliminated. Even if the wrinkle suction opening 203A and the second wrinkle suction opening 203B are not in the positional relationship of 2-E, depending on how the wrinkle is attached to the second wrinkle suction opening 203B, This is because they could be in the same state.
Therefore, in 2-D, Patent Document 3 proposes to avoid the above while explaining the problem of 2-E. Here, the soot suction opening 203A is closer to the tip of the trachea than the second soot suction opening 203B. In this way, even if the tracheal mucosa 206 is sucked into the sputum suction opening 203A, the second sputum suction opening 203B is not closed, so that the force with which the tracheal mucosa 206 is sucked does not increase.
This seems to have an improvement effect because the suction force is weakened. However, this does not mean that the tracheal mucosa 206 is not sucked by the sputum suction opening 203A. In addition, when the second sputum suction opening 203B is closed with a scissors, the suction force to the tracheal mucosa 206 fluctuates depending on whether there is the scissors or when the suction is stopped. May give. Therefore, it is most preferable that no suction of the tracheal mucosa 206 occurs.

Utility model publication S57-182449 Japanese Patent Application No. 2006-537752 Japanese Patent Application No. 2006-199592

It is an object of the present invention to provide a tracheal cannula that has no fear of aspirating the tracheal mucosa by a sputum suction opening for sucking sputum.

The tracheal cannula of the present invention has a respiratory tube for sending and discharging respiratory air and a suction tube for sucking sputum, and the respiratory tube is provided on the wall opposite to the wall facing the tracheal mucosa at the tip of the suction tube. A heel suction opening communicating with the heel suction opening is provided.
The tracheal mucous membrane is provided with a wrap-around margin that avoids blocking the phlegm suction opening by being attached to a position deeper than the tip of the suction tube.
This will be described in the following claims.

The invention according to claim 1 is a tracheal cannula,
A sputum suction unit that has a breathing tube for sending and discharging breathing air and a suction tube for sucking sputum, and communicates with the breathing tube at a wall surface opposite to a wall surface facing the tracheal mucosa at a tip of the suction tube An opening is provided, and the sputum suction opening is
The tracheal mucous membrane is provided with a wrap-around margin that avoids blocking the phlegm suction opening by wrapping around the tracheal mucosa by being attached at a position deeper than the tip of the suction tube.

The invention according to claim 2 is the tracheal cannula according to claim 1,
The wraparound margin is
The wall surface facing the tracheal mucosa at the distal end of the suction tube bends in a “U” shape toward the opposite wall surface, and the heel suction between the distal end of the U shape and the opposite wall surface With an opening, or
The tip of the suction tube is provided with the wall surface facing the tracheal mucosa protruding longer toward the tip than the opposite wall surface.

The invention according to claim 3 is the tracheal cannula according to claim 1 or 2,
At the tip of the suction tube,
The wall surface opposite to the tracheal mucosa and the opposite wall surface are provided with a stagnation groove fitted with a gap with the former being concave and the latter being convex.

Since it is constituted as described above, the tracheal cannula according to the present invention can completely eliminate the risk of suction of the tracheal mucosa from the sputum suction opening of the sputum.

FIG. 2 shows one embodiment of the tracheal cannula of the present invention. It is a figure which shows the example of the conventional tracheal cannula.

The tracheal cannula of the present invention has a respiratory tube for sending and discharging respiratory air and a suction tube for sucking sputum, and the respiratory tube is provided on the wall opposite to the wall facing the tracheal mucosa at the tip of the suction tube. A heel suction opening communicating with the heel suction opening is provided.
The tracheal mucous membrane is provided with a wrap-around margin that avoids blocking the phlegm suction opening by being attached to a position deeper than the tip of the suction tube.
This will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the tracheal cannula of the present invention.
Two shapes 1-A and 1-B are shown. 1-C shows a modification of 1-B.
Of course, a cuff (balloon) that shields the trachea during use and an air supply device may be provided, but the description is omitted.
First, at 1-A, the tracheal cannula 100 has a respiratory tube 101 for sending and discharging respiratory air and a suction tube 103 for sucking sputum accumulated in the trachea. Used to connect to the sputum suction tool. The respiratory tube 101 is used by being connected to an external ventilator at the end of the flange 104. At the tip 102 near the lung side of the tracheal cannula 100, the curved convex surface (here, the lower side) of the tracheal cannula 100 is where the heels accumulate when the patient lies down. The phlegm suction opening 103A, which is a hole for this purpose, is provided on the wall surface opposite to the wall surface facing the tube mucosa at the tip of the suction tube. In this example, since the phlegm suction opening 103A is slightly behind the tip of the tracheal cannula 100, the tracheal mucosa cannot wrap around the phlegm suction opening 103A. In other words, it has a wraparound margin. Here, the wall facing the mucous membrane of the tube at the tip of the suction tube is bent in a “U” shape toward the opposite wall, and the heel suction opening 103A is formed between the tip of the U and the opposite wall. Is done.
In 1-B, the sputum suction opening 103A opens to the distal end portion 102 and does not have the same wrap-around margin as in 1-A, but on the wall surface opposite to the wall facing the tracheal mucosa. Since the sputum suction opening 103A is open and the wall surface facing the tracheal mucosa extends to the distal end portion 102, the stretched portion forms a marginal portion and the tracheal mucosa is not sucked. .
Here, the wall surface facing the tracheal mucosa protrudes toward the distal end longer than the opposite wall surface at the distal end of the suction tube.
1-C is a modified example of 1-B, and the wall surface opposite to the wall facing the tracheal mucosa is provided with a stagnation groove 105 fitted with a gap with the former being concave and the latter being convex. Is. Since phlegm collects in this groove, it can be sucked in effectively.

In addition, since the member which comprises the tracheal cannula 100 is not different from what was introduced in many literatures, they can be used. Needless to say, the position where the phlegm suction opening 103A is provided is provided on the curved convex side of the tracheal cannula 100 which is on the lower side when the patient lies down.

As described above, the tracheal cannula according to the present invention has no fear of the tracheal mucosa being pulled and distorted by the suction force by inhalation of the sputum, so that the tracheal mucosa is not damaged due to the suction. The above usability is extremely large.

100, 200 Tracheal cannula 101, 201 Tip portion 102, 202 Respiratory tube 103, 203 Suction tube 103A, 203A Suction suction opening 104 Flange 105 Sag retention groove 202A Respiratory tube opening 204 Cuff 205 Insufflation tool 206 Tracheal mucosa

Claims (3)

A sputum suction unit that has a breathing tube for sending and discharging breathing air and a suction tube for sucking sputum, and communicates with the breathing tube at a wall surface opposite to a wall surface facing the tracheal mucosa at a tip of the suction tube An opening is provided, and the sputum suction opening is
The trachea is provided with a wrap-around margin for avoiding the tracheal mucosa from going around and closing the phlegm suction opening by being attached at a position deeper than the tip of the suction pipe Cannula. The wraparound margin is
The wall surface facing the tracheal mucosa at the distal end of the suction tube bends in a “U” shape toward the opposite wall surface, and the heel suction between the distal end of the U shape and the opposite wall surface With an opening, or
2. The tracheal cannula according to claim 1, wherein the wall of the suction tube facing the tracheal mucosa protrudes toward the distal end longer than the opposite wall surface. At the tip of the suction tube,
The wall surface opposite to the tracheal mucosa and the wall surface on the opposite side are provided with a depression groove fitted with a gap with the former being concave and the latter being convex. Tracheal cannula.

Images