JP2004016460A - Endotracheal tube with cuff internal pressure monitor balloon - Google Patents

Abstract

An object of the present invention is to be able to easily and reliably maintain a constant internal pressure of a cuff, to have high accuracy and to improve usability.
A cuff tube (10) having a pilot balloon (31) that can communicate with a cuff inflation lumen and is linked to a cuff internal pressure at a distal end thereof is provided at a connector portion of an endotracheal tube. A notch 27 is provided from the outer periphery to the center, and a part of the sides 27a and 27b of the notch 27 facing each other is set so as to approach, contact or intersect each other according to the cuff internal pressure.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an endotracheal tube such as a tracheostomy tube or an oral or nasal endotracheal intubation tube, and more particularly, has a cuff in a vent tube which is a lumen body of the endotracheal tube, A cuff inflation lumen communicating with the cuff is provided in the tube wall, and the cuff inflation lumen is provided with a cuff tube having a pilot balloon having a function of monitoring and interlocking with the cuff internal pressure. It relates to an inner tube.
[0002]
[Prior art]
As is well known, an endotracheal tube, for example, a tracheostomy tube, is a medical device used for patients having insufficient respiratory function. The tracheostomy tube is attached to the human body by performing a tracheostomy on the patient and inserting it into the incision.By this tracheostomy tube, air is sent from the outside to the lungs through the trachea, or from the lungs to the outside. It is sent out. Therefore, the patient can breathe normally by the natural respiratory movement of the human body without passing air through the throat and nose.
[0003]
In the case of patients with respiratory failure, attaching a ventilator to the lungs inflates the lungs with positive pressure and evacuates the air with negative pressure. In those with attached, etc., it is possible to remove the stored sputum, the one provided with a hole or the like in the wall of the curved portion of the vent tube of the tracheostomy tube, it is possible to talk with the patient, Has a wide range of uses.
[0004]
FIG. 10 is a perspective view of a conventional endotracheal tube and its AA sectional view.
[0005]
In the figure, reference numeral 1 denotes a tracheostomy tube, and a vent tube 2 thereof is a substantially L-shaped lumen body curved with a slightly large curvature at approximately 90 °. The lumen of the lumen body is a lumen 2a for securing an airway. Has become. A cuff 4 covers one end 3 of the vent tube 2 or an outer periphery in the vicinity thereof, and has a role of, for example, supporting the vent tube 2 inserted into the trachea without a gap, and is entirely hollow like a tire. The hollow portion is pressurized or depressurized via a cuff inflation lumen 5 provided in the tube wall of the vent tube 2, so that the entire cuff 4 can be appropriately expanded or contracted.
[0006]
Further, a suction lumen 13 for sucking and removing a viscous fluid such as sputum or a solid substance such as food in the trachea is provided at a position facing the cuff inflation lumen 5 in the tube wall of the vent tube 2. The suction opening 13 a is provided so as to be opened to the outside at a predetermined portion of the curved portion of the vent tube 2. It is important that the suction lumen 13 has a smaller impulse as a lumen than the cuff inflation lumen 5 because of the necessity of high suction performance, and it is necessary to form a lumen larger than the cuff inflation lumen 5. . For this reason, the lumen of the vent tube 2 is biased toward the cuff inflation lumen 5 side, and the wall thickness on the side where the suction lumen 13 is formed is opposite to the side on which the cuff inflation lumen 5 is formed. Is thicker than the wall thickness.
[0007]
Reference numeral 6 denotes a connector part which constitutes the other end of the vent tube 2, and a ventilator and a lid (not shown) used on the outer peripheral part near the end as necessary, if necessary. A rotatable connection portion 11 having a pair of locking pieces 11a, 11a, which are cylindrical when used for mounting the device, have a flange at a lower end portion, and a string such as an artificial respirator is connected to a position opposite to the flange. Are fitted. Reference numeral 7 denotes a fixture integrally provided at a lower end portion of the connector portion 6, comprising a shaft portion 8a extending from the connector portion 6 and a wing-like arm portion 8b provided below the shaft portion 8a and extending to both left and right sides. Holes 9 for attachment to the human body are provided near the tip of the portion 8b. A cuff tube having a pilot balloon 14 communicated with the cuff inflation lumen 5 and used to pressurize or depressurize the hollow portion of the cuff 4 above the arm portion 8b of the shaft portion 8a of the fixture 7. A suction lumen tube 12 connected to a suction lumen 13 is attached. Further, the pilot balloon 14 has a check valve (not shown) on the inside, and has a connection portion 16 for air injection communicating with a hollow portion of the pilot balloon 14, and a cap for closing the connection portion 16 for air injection. 18 are provided.
[0008]
The tracheostomy tube 1 thus configured is inserted into an incision opened from the throat of the human body to the trachea so that the end 3 of the vent tube 2 faces the lung side, and is fixed to the hole 9 of the fixture 7. A string is attached, and this fixed string is fixed to the human body so as to be put on the neck. Next, air is sent from the cuff inflation lumen 5 through the cuff tube 10 via the pilot balloon 14 so that the cuff 4 of the tracheostomy tube 1 lightly presses the inner peripheral surface of the trachea. While supporting the tracheostomy tube 1 in the trachea, the air discharged from the lungs is placed so that it does not escape from the throat or nose.
[0009]
After the indwelling, the air exhaled from the lungs is exhausted to the outside of the human body from the opening of the connector section 6 through the airway securing lumen 2a of the vent tube 2 without falling through the throat and nose. Air from outside the human body is taken into the lungs through the airway securing lumen 2a. By repeating this, normal breathing is performed. During placement of the tracheostomy tube 1, viscous fluid such as sputum and solids such as food in the trachea are sucked by the suction lumen 13 and discharged to the outside of the human body through the suction lumen tube 12.
[0010]
[Problems to be solved by the invention]
The conventional endotracheal tube as described above is used to inflate the lungs, secure positive pressure and negative pressure to remove air, or prevent viscous fluids such as sputum and solids such as food from flowing into the trachea. The air is sent from the cuff inflation lumen 5 through the pilot balloon 14 and the cuff tube 10 to the cuff 4 provided at the end 3 of the vent tube 2 and inflated. Was pressed, and the tracheostomy tube 1 was left in the trachea. Therefore, it is necessary to send a predetermined amount of air to the cuff 4 to maintain the cuff 4 at a constant internal pressure. If the pressure of the cuff 4 is excessively increased (35 mmHg or more), the tracheal mucosa may be damaged. However, it is difficult to supply a predetermined amount of air to the cuff 4 and to keep the internal pressure of the cuff 4 constant. For example, it is also possible to attach a pressure gauge to the pilot balloon 14 to control the internal pressure of the cuff 4 to be constant. Although it is possible, there was a problem that it took a lot of trouble.
[0011]
Therefore, at present, the user relies on the feel of the user's experience, etc., and feels the degree of inflation of the pilot balloon 14 by hand and feels the degree of the inflation, that is, the state of the internal pressure of the cuff 4, so that a predetermined amount of air is applied to the cuff 4. To keep the internal pressure of the cuff 4 constant and to confirm them. However, since the tactile sensation varies among users, it is also difficult to supply a predetermined amount of air to the cuff 4 and to keep the internal pressure of the cuff 4 constant, and also to make up the material of the pilot balloon 14 and the tracheostomy tube. Since the tactile sensation varies depending on the manufacturing conditions of the first method, it is unclear whether the supply of a predetermined amount of air to the cuff 4 and the maintenance of a constant internal pressure are surely performed, and the accuracy is lacking. was there.
[0012]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can easily and reliably maintain a constant internal pressure of a cuff, and is highly accurate and easy to use. It is intended to provide an intraluminal tube.
[0013]
[Means for Solving the Problems]
An endotracheal tube with a cuff internal pressure monitor balloon according to claim 1 of the present invention has the following configuration. That is, a lumen of a lumen body having a cuff on one end outer peripheral surface and a connector part formed on the other end is used as an airway securing lumen, and the cuff is inserted into a tube wall of the lumen body. In an endotracheal tube provided with a cuff inflation lumen communicating with the cuff and a suction opening communicating with the outside along the longitudinal direction of the lumen, the cuff inflation lumen communicates with a connector of the lumen. A cuff tube having a pilot balloon that can be monitored in conjunction with the cuff internal pressure is provided at the distal end, and a notch is provided on the pilot balloon from the outer periphery to the center, and opposing sides of the notch are provided. Are set so as to approach, touch or intersect each other according to the cuff internal pressure.
[0014]
In the endotracheal tube with a cuff internal pressure monitor balloon according to claim 2, the pilot balloon is formed in a C-ring shape.
[0015]
The endotracheal tube with a cuff internal pressure monitoring balloon according to claim 3 is provided with a mark indicating the usable pressure range in an area where the opposing sides of the notch cross at least within the appropriate management pressure range in the pilot balloon. It is.
[0016]
Further, the endotracheal tube with a cuff internal pressure monitor balloon according to claim 4 has a check valve at a position opposite to the notch portion of the pilot balloon, and has a check valve to fix an air injection connection portion communicating with the hollow portion of the pilot balloon. And a fixing portion for a cuff tube communicating with the hollow portion of the pilot balloon.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a plan view and a side view showing a non-pressurized state before air injection of a pilot balloon which is a main part of an endotracheal tube with a cuff internal pressure monitor balloon according to a first embodiment of the present invention, and FIG. FIG. 3 is a plan view and a side view showing a pressurized state of the balloon after air injection, FIG. 3 is a plan view of a pilot balloon showing a state where air is further injected from the state of FIG. 2, and FIGS. It is an explanatory view, and in each figure, the same parts as those of the above-described conventional example (FIG. 10) are denoted by the same reference numerals. Here, an example in which the present invention is applied to a tracheostomy tube will be described. Therefore, the description will refer to FIG. 10 described above.
[0018]
First, the basic principle of the present invention will be described with reference to FIGS. When air is injected into the deflated circular balloon 21 having an outer diameter D1 shown in the left side of FIG. 4 and the thickness of the balloon is increased, the outer diameter D2 becomes smaller as in an inflated balloon 21a shown on the right side of FIG. If the circumferential length does not change, the outer circumference becomes slack to the extent that the outer diameter is reduced, and wrinkles 22 are formed. The wrinkles 22 occur in a pressure region including a usable pressure range of the cuff 4 of 25 to 35 mmHg. The present invention detects the internal pressure of the balloon (= cuff internal pressure) by utilizing the physical phenomenon that the outer diameter of the balloon is reduced by the air injection, that is, the phenomenon that the outer circumference of the balloon is contracted by the air injection.
[0019]
That is, when the notch 24 is provided from the outer periphery to the center as in the balloon 23 shown in FIG. 5, even when the outer diameter is reduced by air injection, no wrinkles are generated on the outer periphery, and the outer diameter is reduced. For this reason, the gap between the notches 24 is reduced as in the inflation balloon 23a shown on the right side of FIG. Therefore, depending on the setting of the gap before the air injection of the notch 24, a part of the sides 24a and 24b of the notch 24 of the inflating balloon 23a after the air injection oppose each other depending on the internal pressure of the cuff. It can be configured to intersect, and the balloon internal pressure (= cuff internal pressure) can be clearly and accurately grasped visually. In the case of the balloon 23, under the state of the inflation balloon 23a after the air is injected, wrinkles are formed on the back side 24c of the cutout portion 24 because the outer diameter of the arc at the back side 24c is small.
[0020]
If the C-ring balloon 25 is used as in the balloon shown in FIG. 6, even if the outer diameter and the inner diameter of the C-ring are reduced by air injection, no wrinkles are generated on the outer circumference 26a and the inner circumference 26b, and the outer diameter is reduced. In addition, the gap between the notches 27 is smoothly reduced as shown in the inflation balloon 25a on the right side of FIG. Therefore, depending on the setting of the gap between the notches 27 before the air injection, the opposing sides 27a and 27b of the notch 27 of the inflation balloon 25a after the air injection approach or contact each other depending on the cuff internal pressure. It can be easily configured to cross, and the balloon internal pressure (= cuff internal pressure) can be clearly and accurately grasped visually.
[0021]
Although the shapes of the cutouts 24 and 27 before the air injection are described as wedge-shaped, the present invention is not limited to this. For example, the cutouts may have a shape in which opposing sides are parallel or an inverted wedge. Various shapes can be adopted, and a shape that can easily detect the balloon internal pressure (= cuff internal pressure), that is, a shape that can obtain a predetermined deformation amount, may be appropriately selected according to the material of the balloon.
[0022]
Although the basic shape of the balloon has been described as being circular here, the present invention is not limited to this, and may take the form of a rectangle, a polygon, or a tangible indefinite object.
[0023]
The endotracheal tube with a cuff internal pressure monitoring balloon according to the present embodiment is configured such that the basic shape of the pilot balloon 31 is a C-ring balloon as described with reference to FIG.
[0024]
This will be described in more detail with reference to FIGS. 1 to 3 and FIG. In each drawing, the same reference numerals are given to the same functional portions as those in FIGS. 6 and 10 described above. The pilot balloon 31 is formed, for example, by molding and punching two films by a heat fusion type into a bag-like body. When no pressure is applied, the pilot balloon 31 is flat or substantially flat as shown in FIG. At the time of pressurization by injection, a thickness is generated as shown in FIG. Before the air injection into the notch 27 of the pilot balloon 31 (when no pressure is applied in FIG. 1), the gaps between the sides 27a and 27b of the notch 27 facing each other as shown in FIG. When the front ends (outer peripheral ends) 32 contact each other and are pressurized by 35 mmHg by air injection, the opposing sides 27a and 27b of the notch 27 overlap as shown in FIG. It is set so as to intersect at the portion 33, whereby the balloon internal pressure (= cuff internal pressure) can be visually and clearly and accurately grasped.
[0025]
The pilot balloon 31 has a check valve (not shown) at a position that does not affect the deformation operation of the notch 27 when the internal pressure rises due to air injection, that is, at a position opposite to the notch 27. A fixing portion 35 for sealingly fixing the outer periphery of the air injection connection portion 16 communicating with the pilot balloon hollow portion 34, and a fixing portion for sealingly fixing the outer periphery near the balloon insertion end of the cuff tube 10 communicating with the pilot balloon hollow portion 34. 36 are provided shifted in the circumferential direction. In addition, a cap 18 as shown in FIG. 10 may be provided at the tip of the connecting portion 16 for air injection.
[0026]
In the endotracheal tube with a cuff internal pressure monitor balloon of the present embodiment configured as described above, first, the vent tube 2 of the tracheostomy tube 1 is opened from the throat of the human body to the trachea so that the end 3 faces the lung side. It is inserted into the incision, and inserted until the lower surface side of the fixture 7 of the tracheostomy tube 1 contacts the skin near the incision. After insertion, a fixing cord is attached to the hole 9 of the arm portion 8b of the fixing tool 7 of the tracheostomy tube 1, and the fixing cord is fixed to the neck of the human body. Next, a syringe for sending air is connected to the distal end side of the air injection connection portion 16 of the pilot balloon 31, and air is sent into the hollow portion 34 of the pilot balloon 31 while pressing the check valve. The sent air is sent to the insertion end of the cuff tube 10 opening in the hollow portion 34 while inflating the pilot balloon 31, and further from the cuff tube 10 to the cuff 4 via the cuff inflation lumen 5. Sent. Then, the cuff 4 is gradually inflated by the sent air, presses the inner peripheral surface of the trachea to support the tracheostomy tube 1 in the trachea, and keeps the air exhaled from the lungs from flowing into the throat and nose. Detain in
[0027]
At this time, when it is desired to set the internal pressure (= cuff internal pressure) of the pilot balloon 31 to 20 mmHg, as shown in FIG. 2, the distal ends (outer peripheral side ends) 32 of the sides 27 a and 27 b of the notch 27 opposing each other are set to each other. Air is sent from the syringe until it comes into contact, and when the leading ends (outer peripheral ends) 32 of the sides 27a and 27b come into contact with each other, the supply of air from the syringe connected to the air injection connecting portion 16 is stopped.
[0028]
When the internal pressure (= cuff internal pressure) of the pilot balloon 31 is set to be increased to 35 mmHg, the opposing sides 27a and 27b of the cutout portion 27 overlap as shown in FIG. Air is sent from the syringe until it intersects with, and when the sides 27a and 27b overlap and intersect at the longitudinal middle portion 33, the supply of air from the syringe connected to the air injection connecting portion 16 is stopped. I do. In this manner, the cuff 4 is adjusted to a desired internal pressure while visually and clearly grasping the balloon internal pressure (= cuff internal pressure).
[0029]
After the indwelling, the air exhaled from the lungs is exhausted to the outside of the human body from the opening of the connector portion 6 through the airway securing lumen 2a of the vent tube 2 without escaping to the throat or nose side. Air from outside the human body is taken into the lungs through the airway securing lumen 2a. By repeating this, normal breathing is performed. If air escapes from the cuff 4, the leading ends (outer peripheral ends) 32 of the sides 27a and 27b of the notch 27 of the pilot balloon 31 are separated or the position where the sides 27a and 27b intersect is shifted. Again, the air is supplied to the pilot balloon 31 so that the distal ends (outer peripheral ends) 32 of the sides 27a and 27b are in contact with each other, or the intersection of the sides 27a and 27b is the middle part 33 in the longitudinal direction. , The internal pressure of the cuff 4 is kept constant at the target internal pressure.
[0030]
When removing the tracheostomy tube 1, a syringe is connected to the air injection connection portion 16 of the pilot balloon 31, and the air in the hollow portion 34 of the pilot balloon 31 is extracted while pressing the check valve, and the cuff inflation lumen is released. The cuff 4 is contracted via the cuff tube 5 and the cuff tube 10, and the pilot balloon 31 is also contracted as shown in FIG. Then, the pressure on the inner peripheral surface of the trachea by the cuff 4 is released, and the tracheostomy tube 1 is pulled out of the trachea. Next, the fixing cord that has been wrapped around the neck of the human body is removed, and the tracheostomy tube 1 is pulled out from the incision portion opened into the trachea from the throat of the human body and removed.
[0031]
As described above, in the endotracheal tube with a cuff internal pressure monitor according to the present embodiment, when the opposing sides 27a and 27b of the cutout portion 27 of the pilot balloon 31 are partially controlled at the appropriate cuff internal pressure (20 to 35 mmHg), Since air is sent into the hollow portion 34 so as to contact or intersect with each other, the contact or intersection of the two sides 27a and 27b is visually confirmed, so that the balloon internal pressure (= cuff internal pressure) is clearly and accurately determined. A predetermined amount of air can be supplied to the cuff 4 while grasping. Further, by maintaining the contact state or the cross state of the two sides 27a, 27b, the internal pressure of the cuff 4 can be kept constant at the target internal pressure. Thereby, the swelling of the pilot balloon 31 is touched by hand, and the swelling state, that is, the feeling of the internal pressure of the cuff 4 is not relied on. In addition, a predetermined amount of air can be supplied to the cuff 4 and the internal pressure can be maintained at a constant level, and its confirmation can be performed. Thus, the tracheostomy tube 1 with high accuracy and ease of use can be obtained.
[0032]
In addition, since the pilot balloon 31 is formed of a C-ring balloon, the deformation operation of the cutout portion 27 when the internal pressure rises due to air injection becomes smooth, and it is possible to react sensitively to a change in the internal pressure. Can be confirmed by
[0033]
At the position opposite to the notch 27 of the pilot balloon 31, a fixing portion 35 of the air injection connection portion 16 communicating with the pilot balloon hollow portion 34 and a fixing portion of the cuff tube 10 communicating with the pilot balloon hollow portion 34. Since the fixing portion 36 is provided, the fixing portions 35 and 36 do not affect the deformation operation of the cutout portion 27 when the internal pressure rises due to air injection.
[0034]
Embodiment 2. FIG.
FIG. 7 is a plan view showing a non-pressurized state before air injection of a pilot balloon which is a main part of an endotracheal tube with a cuff internal pressure monitor balloon according to a second embodiment of the present invention, and FIG. FIG. 9 is a plan view showing a pressurized state after the injection, and FIG. 9 is a plan view of the pilot balloon showing a state in which air is further injected from the state of FIG. 8, and in each figure, the first embodiment (FIGS. ) Are given the same reference numerals. Note that, here, an example in which the present invention is applied to a tracheostomy tube will be described with reference to FIG. 10 described above.
[0035]
The endotracheal tube with a cuff internal pressure monitor according to the second embodiment has the notch 27 within the appropriate management pressure range (20 to 35 mmHg) on the surface of the C-ring shaped pilot balloon 31 described in the first embodiment. The mark 41 indicating the usable pressure range is provided in the area where the opposing sides 27a and 27b intersect, that is, in the radial band. However, the mark 41 indicating the usable pressure range must be provided in the entire circumferential direction. However, the intended purpose can be achieved if provided at least at the opposing sides 27a and 27b.
[0036]
In the second embodiment, even when the balloon internal pressure (= cuff internal pressure) is 20 mmHg, the gap between the notches 27 is set such that the sides 27a and 27b overlap and intersect with each other. Such setting is also possible by selecting the material 31. Therefore, the position 42 where the sides 27a and 27b intersect at the outermost periphery of the mark 41 shown in FIG. 8 is the position of the internal pressure (= cuff internal pressure) of 20 mmHg of the pilot balloon 31 and the innermost periphery of the mark 41 shown in FIG. The position 43 where the sides 27a and 27b intersect is the position of 35 mmHg of the internal pressure (= cuff internal pressure) of the pilot balloon 31. Other configurations are the same as those of the above-described first embodiment, and have all the functions of the first embodiment.
[0037]
In this way, by displaying the appropriate control pressure range (20 to 35 mmHg) on the pilot balloon surface, the balloon internal pressure (= cuff internal pressure) can be more clearly and accurately grasped visually, and overpressure due to erroneous recognition can be obtained. Accidents can be prevented and safety and reliability can be improved. Further, since the balloon internal pressure (= cuff internal pressure) can be roughly set within the proper management pressure range, that is, the range of the mark 41, the usability is further improved.
[0038]
In each of the embodiments described above, the pilot balloon is formed of a C-ring balloon as an example. However, as described in the basic principle of the present invention (FIG. 5), what is important here is air injection. Due to the physical phenomenon that the outer diameter of the balloon becomes smaller, that is, the phenomenon that the outer periphery of the balloon shrinks due to air injection, the point that the opposite sides of the cutout provided from the outer periphery of the balloon to the center can be visually caught, and it is not necessarily required. It is needless to say that the pilot balloon does not need to have a C-ring shape, and various forms (rectangular, polygonal or tangible indefinite) can be adopted.
[0039]
【The invention's effect】
As described above, according to the first aspect of the present invention, the notch is provided from the outer periphery to the center of the pilot balloon to be monitored in conjunction with the cuff internal pressure. In accordance with the cuff internal pressure, the cuffs are set so as to approach, contact or intersect with each other, so that a predetermined amount of air can be easily and reliably supplied to the cuff, and a constant internal pressure can be maintained and confirmed visually. An endotracheal tube was obtained.
[0040]
According to the second aspect of the present invention, since the pilot balloon is formed in the shape of a C-ring, the deformation operation of the notch when the internal pressure rises due to air injection becomes smooth, and it is possible to react sensitively to changes in the internal pressure. Was.
[0041]
According to the third aspect of the present invention, since the mark indicating the usable pressure range is provided at least in the area where the opposing sides of the cutouts intersect at least within the appropriate management pressure range in the pilot balloon, the balloon internal pressure (= cuff) is set. (Internal pressure) can be more clearly and accurately grasped visually, accidents such as overpressure due to misidentification can be prevented, and safety and reliability have been improved.
[0042]
According to the fourth aspect of the present invention, the fixed portion of the air injecting connection portion having a check valve at the position opposite to the notch portion of the pilot balloon and communicating with the hollow portion of the pilot balloon, Since the fixing portions of the cuff tube communicating with the portions were provided, it was possible to prevent these fixing portions from affecting the deformation operation of the cutout portion when the internal pressure was increased by air injection.
[Brief description of the drawings]
FIG. 1 is a plan view and a side view showing a non-pressurized state of a pilot balloon, which is a main part of an endotracheal tube with a cuff internal pressure monitor, according to a first embodiment of the present invention before air injection.
FIGS. 2A and 2B are a plan view and a side view showing a pressurized state of a pilot balloon, which is a main part of the endotracheal tube with a cuff internal pressure monitor, according to the first embodiment after air injection.
FIG. 3 is a plan view of the pilot balloon showing a state where air is further injected from the state of FIG. 2;
FIG. 4 is an explanatory diagram of a basic principle of the present invention.
FIG. 5 is an explanatory diagram of a basic principle of the present invention.
FIG. 6 is an explanatory diagram of a basic principle of the present invention.
FIG. 7 is a plan view showing a non-pressurized state before air injection of a pilot balloon, which is a main part of an endotracheal tube with a cuff internal pressure monitor according to a second embodiment of the present invention.
FIG. 8 is a plan view showing a pressurized state after air injection of a pilot balloon which is a main part of an endotracheal tube with a cuff internal pressure monitor according to a second embodiment.
FIG. 9 is a plan view of the pilot balloon showing a state where air is further injected from the state of FIG.
FIG. 10 is a perspective view of a conventional tracheostomy tube and its AA cross-sectional view.
[Explanation of symbols]
1 tracheostomy tube (endotracheal tube)
2a Lumen for securing airway
4 cuffs
5 Cuff inflation lumen
6 Connector
10 Cuff tube
13 Suction lumen
13a Suction opening
16 Air connection
27 Notch
27a, 27b Side of notch
31 Pilot balloon
34 Hollow part of pilot balloon
35 Fixing part of connection part for air injection
36 Fixing part of cuff tube
41 Mark indicating usable pressure range

Claims (4)

The lumen of a lumen body having a cuff on one end outer peripheral surface and a connector part formed on the other end is used as an airway securing lumen, and communicates with the cuff in a lumen wall of the lumen body. In the endotracheal tube provided with a cuff inflation lumen and a suction lumen having a suction opening communicating with the outside along the lumen body longitudinal direction,
A cuff tube having a pilot balloon that can communicate with the cuff inflation lumen and is linked to the cuff internal pressure at the distal end thereof is provided at the connector of the lumen body, and the pilot balloon is provided with a cuff tube. A cut-off portion is provided from the outer periphery to the central portion, and a part of the opposing sides of the cut-out portion is set so as to approach, contact, or intersect with each other according to the cuff internal pressure. Endotracheal tube. The endotracheal tube with a cuff internal pressure monitoring balloon according to claim 1, wherein the pilot balloon is formed in a C-ring shape. 3. A cuff internal pressure monitor balloon according to claim 1 or 2, wherein a mark indicating a usable pressure range is provided in an area of the pilot balloon at which the opposing sides of the notch intersect at least within an appropriate management pressure range. With endotracheal tube. A fixing portion of a connection portion for air injection having a check valve at a position opposite to the cutout portion of the pilot balloon and communicating with the hollow portion of the pilot balloon, and fixing of a cuff tube communicating with the hollow portion of the pilot balloon. The endotracheal tube with a cuff internal pressure monitor balloon according to any one of claims 1 to 3, wherein a portion is provided.

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