JPH119615A - Oxygen inhaling or inhaling anesthetizing method for animal and double-type in-windpipe tube for animal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit oxygen supply and an anesthetizing effect to be the sure ones to prevent a hypoxidosis by independently juxtaposing an exhalation discharge pipe and an inhalation supply pipe in a windpipe which is sealed by means of an expansion baloon cuff to discharge an inhalation and to supply oxygen-contained anesthetizing gas. SOLUTION: A distance L from the front end of the baloon cuff 12 to the rear end of a tip opening part 13 is made to be longer than a man's single-type in-windpipe tube so as to be adapted as the one for a small dog and a cat. When the tip opening part 13 of the exhalation discharge pipe 11 is inserted to a windpipe branch part 9, the baloon cuff 12 is made to be fixed in the neighborhood of the center part of the windpipe 8. A ventilation hole 15 is provided on the front pipe wall of the baloon cuff 12 and the exhalation discharge pipe 11 is attached. Besides, a horizontal hole 16 is formed on a rear pipe wall so as to attach the inhalation supply pipe 21. When the baloon cuff 12 is expanded so as to seal the windpipe 8, the exhalation is discharged from the exhalation discharge pipe 11, oxygen and oxygen-contained anesthetizing gas are supplied from the inhalation supply pipe 21 and anesthetizing is perfectly and safely executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention has been made to significantly improve the efficiency of oxygen inhalation and inhalation anesthesia.
The present invention relates to a method for inhaling or inhaling oxygen in animals and a double-tube type endotracheal tube for animals used in the method.

[0002]

2. Description of the Related Art When inhaling oxygen or inhaling anesthesia to animals such as dogs, cats, and horses, a closed-circulation method as shown in FIG. That is, the exhalation coil 6 connected to a carbon dioxide gas absorption can called a canister of an inhalation anesthesia machine and the inhalation coil 7 connected to an oxygen cylinder or a vaporizer for volatilizing an anesthetic are merged. The single tube type endotracheal tube 1 for humans having the balloon cuff 2 is connected thereto. Actually, as shown in FIG. 9, a Y-shaped trifurcated joint called a chimney piece 5 is attached to the end of the exhalation flexible tube 6 and the end of the inspiratory flexible tube 7, and this is fitted to a single-tube type human pneumatic tube. The rear end opening 4 of the inner tube 1 is connected.

The role of the inflatable balloon cuff 2 is to fix the endotracheal tube in the trachea and to prevent anesthesia gas sent into the lungs from leaking through the trachea into the clinic. Regarding the attachment position of the balloon cuff 2 in the single tube type endotracheal tube 1 for humans, regardless of the length and outer diameter of the tube, as shown in L of FIG. It is prescribed.

[0004]

In the conventional oxygen inhalation or inhalation anesthesia method using the single tube type endotracheal tube 1 for humans, the exhaled air containing a large amount of carbon dioxide in the tube of the endotracheal tube, oxygen and anesthetic gas And alternately pass through. For this reason, expiration and inhalation are mixed in the endotracheal tube, causing the following inconvenience. I. The rich oxygen needed for lifesaving does not reach the lungs, causing the emergency patient to die. B. Since the anesthetic gas is diluted by exhalation, the onset of the anesthetic effect is slow. C. The inspired gas mixes with exhaled carbon dioxide, causing hypoxia. D. Waste of oxygen and anesthetics is high and uneconomical.

[0005]

In order to overcome the drawbacks of the above-mentioned conventional method, in the method of inhaling or inhaling an oxygen of an animal according to the present invention, the single tube type endotracheal tube 1 for a human is replaced with the present invention. As shown schematically in FIG. 1, a double tube type endotracheal tube 10 for animals is used, and an expiratory discharge tube 11 and an inhalation inlet tube 21 are separately provided in a trachea 8 sealed with an inflatable balloon cuff 12. ing. That is, without using the conventional chimney piece, the exhalation discharge tube 11 of the double-tube type endotracheal tube 10 is directly connected to the exhalation flexible tube 6 of the inhalation anesthesia machine to discharge the exhalation in both the left and right lungs, and to perform the inhalation anesthesia. The intake pipe 21 of the double-pipe endotracheal tube 10 is directly connected to the intake pipe 7 of the vessel, and oxygen or oxygenated anesthetic gas is supplied to both the left and right bronchi. In this way, it is possible to reliably prevent the exhaled air from mixing with the inspired air in the endotracheal tube. For this reason, fresh oxygen and oxygenated anesthetic gas without carbon dioxide gas can always be discharged from the inlet of the intake air inlet pipe 21 inserted up to the tracheal bifurcation 9. Therefore, all of the disadvantages (1), (2), (3), and (4) are completely and reliably eliminated.

The double tube type endotracheal tube 10 for animals according to the present invention is used for carrying out the method for inhaling or inhaling oxygen of an animal according to the present invention. It is improved and another thin tube is inserted into this tube to form a double tube type. That is, an exhalation discharge tube 11 which is connected to the exhalation flexible tube 6 of the inhalation anesthesia machine and can be inserted into the trachea 8, and which is connected to the inhalation flexible tube 7 of the inhalation anesthesia device and is connected to the exhalation discharge tube 11. The intake pipe 21 having a shape that can be inserted into the pipe,
The distal end of the exhalation discharge tube 11 is cut obliquely to open the distal end opening 1.
3, an inflatable balloon cuff 12 is attached to the rear of the rear edge of the distal end opening 13 by 14 mm or more and 20 cm or less. A plurality of ventilation holes 15 are provided in a tube wall in front of the balloon cuff 12 and the balloon cuff 12 is provided. A lateral hole 16 is provided in the rear wall of the tube so that the intake / intake tube 21 can be inserted into the exhalation / exhaust tube 11 from the lateral hole 16.

The double tube type endotracheal tube 10a for an animal according to the present invention comprises a hollow exhalation discharge tube 11a having a semicircular cross section connected to the exhalation flexible tube 6 of the inhalation anesthesia machine, and an inhalation anesthesia machine for inhalation. A hollow air intake pipe 21a having a semicircular cross section connected to the flexible pipe 7 is formed, and the two pipes are joined face to face to form a cylindrical hollow pipe having a partition wall in the longitudinal direction. At the same time, the distal end of the separated hollow tube is obliquely cut to form a distal opening 13a, and the distal opening 13a is formed.
An inflatable balloon cuff 12a is attached to the rear of the trailing edge of a by 14 mm or more and 20 cm or less, and a plurality of ventilation holes 15a are provided in the tube wall of the exhalation discharge tube 11a in front of the balloon cuff 12a.

[0008] In the double tube type endotracheal tubes 10 and 10a for animals, the inflatable balloon cuffs 12 and 12a are attached at least 14 mm behind the rear edges of the distal openings 13 and 13a.
By providing a large number of ventilation holes 15, 15a in the tube wall in front of 12a, the exhalation discharge performance is significantly improved. That is, in the conventional single-tube type endotracheal tube 1 for humans, the exhaled breath exhaled from the lungs is only discharged from one opening of the distal end opening 3. On the other hand, in the double-pipe endotracheal tube 10, 10 a of the present invention, exhalation is performed at the distal opening 13 of the exhalation discharge pipe 11, 11 a.
13a, the balloon cuff 1 fixed to the trachea 8 in the vicinity of a central portion thereof not only flows into and out of the exhalation passage S from the exhalation passage 13a, but also exhales from the lungs as schematically shown in FIG.
The air in the trachea, which is blocked by the air passages 2 and 12a and has nowhere to go, passes through the many ventilation holes 15 and 15a and flows into the expiration passage S. That is, balloon cuff 1
By retreating the attachment position of 2, 12a from the conventional one, the number of breath intake ports of the exhalation discharge tubes 11, 11a increases. As a result, the exhalation efficiency is dramatically improved.

The double tube type endotracheal tube for animals 10 and 1
The excellent exhalation effect of 0a exerts a remarkable effect especially on emergency patients breathing shallowly and hahaha. That is, in the case of the conventional single tube type endotracheal tube 1 for human,
The breath exhaled as "c" was sucked back into the lungs while passing through the tube. Therefore, expiration was mixed with inhalation, and it was not possible to supply rich oxygen to the lungs. As a result, there were many cases where helpers could not help.

On the other hand, when the double-tube type endotracheal tube for animals of the present invention is used, high-concentration oxygen can be reliably delivered to the lungs while expiring expiration. as a result,
The resuscitation survival rate by oxygen inhalation is greatly improved. Similarly,
Since the anesthetic gas is not diluted by exhalation, the time required for the effect of inhalation anesthesia to develop is also significantly reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a double tube type endotracheal tube for animals will be described in detail with reference to the drawings as a specific means for executing the method for inhaling or inhaling oxygen in animals according to the present invention. Will be described.

FIG. 1 is a longitudinal sectional view schematically showing an embodiment of a double tube type endotracheal tube 10 for an animal according to the present invention.
Using an existing single-tube type endotracheal tube 1 made of silicon rubber or vinyl chloride resin as an exhalation discharge tube 11,
The mounting position of the inflatable balloon cuff 12 provided therein is retracted from the conventional one. That is, the distance L from the front end of the balloon cuff 12 to the rear edge of the distal end opening 13
However, in the single tube type endotracheal tube 1 for human, 10 to 13 mm
On the other hand, in the present invention, the length of the distance L in FIG.
It extends from 4 mm or more to 20 cm or less. More preferred lengths of L are 7-9 cm for small dogs and cats, 9-11 cm for medium dogs, and 11-15 cm for large dogs. When the balloon cuff 12 is attached to this position, the balloon cuff 12 can be fixed near the center of the trachea 8 when the distal opening 13 of the exhalation discharge tube 11 is inserted into the tracheal bifurcation 9. The thin film for the balloon cuff and the method of attaching the thin film may be the same as those of the conventional human single tube type endotracheal tube 1.

A plurality of ventilation holes 15 are provided in the tube wall in front of the balloon cuff 12. The shape of the ventilation hole 15 is arbitrary, such as circular or elliptical. The hole diameter is not more than half of the inner diameter of the exhalation discharge tube 11. For example, a vent hole having a hole diameter of about 2 mm is suitable for an exhalation discharge tube having an inner diameter of 4 mm. The space between the ventilation holes is about twice the hole diameter.

A lateral hole 16 is provided in the tube wall behind the balloon cuff 12, and an intake / intake tube 21 is inserted into the lateral hole 16 so as to reach the vicinity of the distal end opening 13 of the exhalation / exhaust tube 11. In order to prevent exhaled air containing anesthetic gas from leaking out of the lateral hole 16, after inserting the intake pipe 21, the gap between the lateral hole 16 and the intake pipe 11 is completely closed with an adhesive or the like. Is desirable

As shown in FIG. 2 which is a cross-sectional view taken along line XX of FIG. 1, the shape of the intake / intake pipe 21 has a sufficient space as an exhalation passage S between itself and the inner wall of the exhalation / exhaust pipe 11. Need to be formed. For example, the cross section of the intake / intake pipe 21 shown in FIG. 2 is a simple ring, but as shown in FIG. 3A, a cylindrical inner wall provided with a plurality of ridges 17 or warts on the outer periphery of the pipe wall. Empty tubes are preferred. Alternatively, as shown in FIG. 3B, the cross section of the intake pipe 21 may be a hollow polygon. The use of the intake / intake tube 21 having such a cross-sectional shape makes it difficult for the double tube type endotracheal tube 10 for animals to be bent. Even if it can bend,
A part of the passage for expiration S can always ensure continuity. Further, by performing a known X-ray opaque process on the distal end of the intake pipe 21, arrival at the tracheal bifurcation 9 can be easily confirmed.

The rear end opening 14 of the exhalation discharge tube 11
Is connected to the exhalation flexible tube 6 of the inhalation anesthesia machine, the inside of the exhalation discharge tube 11 becomes the exhalation passage S. Similarly, when the rear end opening of the intake pipe 21 is connected to the intake pipe 7 of the inhalation anesthesia machine, the interior of the intake pipe 11 becomes an intake passage P.

The double tube type endotracheal tube 10 for animals according to the present invention is inserted into the trachea 8, and the distal end opening 13 is inserted into the tracheal branch 9.
Upon reaching the vicinity, the balloon cuff 12 will be located near the center of the trachea 8. Then, when air is injected through a pilot balloon (not shown), the balloon cuff 12 is inflated to seal the trachea 8. As a result, the exhaled breath exhaled from the lungs flows into the exhalation passage S through the distal end opening 13, and the extracorporeal exhaled gas that has not completely flowed in is blocked by the balloon cuff 12, so that the exhaled passage S passes through the numerous vents 15. Flow into This exhalation passes through the exhalation tube 6 and reaches the canister of the inhalation anesthesia machine. After the carbon dioxide gas is removed, oxygen and oxygenated anesthesia gas are replenished. It is released into the left and right bronchi. Therefore, the double tube type endotracheal tube 10 for animals of the present invention is used.
Mixing of expiration and inspiration never occurs in this tube.

FIG. 4 is a perspective view showing the double tube type endotracheal tube 10a for animals according to the third embodiment in an extremely shortened form. The flat surfaces of the hollow exhalation discharge tube 11a and the intake / intake tube 21a having a semicircular cross section are joined to face each other. The joining means is optional such as adhesion with an adhesive or fusion with a dissolving agent. By joining the flat portions of the two tubes in this way, it looks as if a longitudinal partition wall is provided in the tube of the conventional single tube endotracheal tube 1. Alternatively, a pair of left and right lumens may be formed in the tube by integrally forming the partition wall with a hollow tube having an annular cross section.

The distal end of the hollow tube is cut off obliquely to form a distal opening 13a.
An inflatable balloon cuff 12a is attached at a position 14 mm or more to 20 cm or less behind the trailing edge of the balloon cuff 12a.
A plurality of ventilation holes 15a are provided on the tube wall of the exhalation discharge tube 11a ahead of a. Hollow joints 18 having a semicircular cross section are attached to the rear end opening 14a. By connecting the exhalation coil 6 and the inhalation coil 7 to the joints 18, 18, the exhalation passage S and the inhalation passage P can be separately provided in a single tube.

FIG. 5 is a plan view showing a double tube type endotracheal tube 10b for animals according to a modification of the third embodiment. In this modification, the exhalation discharge pipe 11b of the exhalation passage S and the inhalation passage P
Has a ring-shaped cross section, and the two parallel pipes are separately and independently provided. Therefore, it can be manufactured more simply and inexpensively than joining two hollow tubes having a semicircular cross section. The independent two tubes 11b and 21b are tightly bound by an inflatable balloon cuff 12b, and a sheath-shaped cap 19 is covered on the distal ends of the two tubes to form a double-tube endotracheal tube. The cap 19 is subjected to a known X-ray opacity treatment, and is fixed to the distal ends of both tubes by adhesion or fusion so as not to fall off.

In the above modification, the exhalation discharge pipe 11b becomes the exhalation passage S, and the inhalation intake pipe 21b becomes the inhalation passage P
Becomes In order to tightly bind the two tubes with the balloon cuff 12b, it is necessary to fill the recess formed between the two tubes with the packing material 20, as shown in FIG. As the packing material 20, a rubber rod having a triangular prism shape is preferable. Alternatively, an adhesive may be poured and hardened. By filling and sealing the depression between the two tubes in this way, as shown in FIG. 7, when the balloon cuff 12b is inflated to close the trachea, there is no fear of exhaled air leaking out of the binding portion of both tubes. The attachment position of the balloon cuff 12b is the cap 1
The distance L from the trailing edge of the front end opening of No. 9 ranges from 14 mm to 20 cm.

In addition to the above-mentioned modifications, the double-tube endotracheal tube for animals according to the present invention can take various modifications within the scope of the gist. For example, in the case of the invention of claim 2, although not shown, the existing single-tube type endotracheal tube 1 for a human is inserted into the middle of the trachea, and a thin inhalation inlet pipe 21 passed through the tube is inserted. Almost the same effect can be obtained even when the air reaches the tracheal bifurcation.

Further, although not shown, not limited to the two pipes of the exhalation passage and the inhalation passage, a three-pipe double-pipe type in which the inhalation passage is divided into an oxygen exclusive pipe and an oxygenated anesthetic gas exclusive pipe. An endotracheal tube can also be made. When this is used, the operation of the inhalation anesthesia machine becomes simple, such as when the patient is to be awakened quickly after turning off the anesthesia, which is very convenient.

It should be noted that while an anesthesiologist is always present in a human operation requiring general anesthesia, most veterinary hospitals require that the head of the hospital alone do everything. Most frightening for such veterinarians is respiratory arrest due to over anesthesia. If the patient is killed during the operation, the owner will claim compensation and lose credibility and suffer from hospital management.

In the veterinary field, usually, as a pretreatment for general anesthesia, atropine sulfate 0.
05 mg / kg of body weight is injected subcutaneously, and 10 minutes later, an anesthetic induction agent thiopental is injected intravenously. However, it is difficult to administer thiopental, and although the target is 12.5 mg / kg of body weight,
The safe dosage is delicately affected by differences in susceptibility due to species differences between animals such as dogs and cats, differences among many breeds in the same dog, individual differences in age, nutrition and health status, and the risk of respiratory arrest always Is accompanied. In this regard, there is a struggle that is incomparable to medical treatment targeting only one human species.

Due to the special circumstances unique to the animal hospital,
A technique of spraying a local anesthetic on the larynx with moderate injection of a dangerous anesthetic induction agent and forcibly inserting an endotracheal tube while the laryngeal reflex is not abolished is becoming widespread. After intubation, it is safe to do so, and the dial of the inhalation anesthesia machine can be adjusted to maintain the gas concentration of the relatively safe inhalation anesthetic such as isoflurane at 1-2%.
However, if the administration of the anesthetic induction agent is inadequate, it takes time for the effect of the inhalational anesthetic to appear, and conventionally the operator has to wait for almost 10 minutes until it becomes operable. Did not.

The inventor of the present invention, from the viewpoint of animal welfare,
I disagree with the technique of roughening induction anesthesia such as thiopental prior to tracheal intubation. But we cannot ignore techniques that are becoming more prevalent in the veterinary industry. So, try 8 mongrel dogs (age 3-8, weight 9-20k)
g) was divided into two groups of four animals each, and the effects of the inhalation anesthesia method according to the present invention were tested in both groups without intravenous injection of thiopental. That is, one of the four animals used a single tube type endotracheal tube for humans as before, and the other four animals used the double tube type endotracheal tube for animals of the present invention. % Gas was supplied. as a result,
The time required to reach the surgery application period is 9 minutes and 38 seconds on average in the conventional human single-tube type endotracheal tube group, while the average time in the animal double-tube type endotracheal tube group of the present invention is average. It was 3 minutes and 25 seconds. In other words, according to the present invention, as a result of preventing the anesthetic gas from being diluted into exhaled air, the time required for achieving the effect of inhalation anesthesia is significantly reduced.

Further, the blood oxygen saturation of both groups of experimental dogs under anesthesia was measured using a pulse oximeter.
In the group using the conventional human single tube type endotracheal tube, the oxygen saturation sometimes dropped below 97%. As a result, oxygen had to be added each time, and it was impossible to keep an eye on monitoring. On the other hand, in the group using the double tube type endotracheal tube for animals of the present invention, the oxygen saturation was always maintained at 98 to 99% during the anesthesia, and there was no danger of causing hypoxia.
In other words, the present invention confirms that fresh oxygenated anesthetic gas, which is not diluted in exhaled breath, is delivered to the lung.

Similarly, when blood was collected from the artery at regular intervals and the pH of the blood was measured, the pH range of the conventional human single tube type endotracheal tube group varied from 6.7 to 7.1. In contrast, in the group using the double tube type endotracheal tube for animals of the present invention, the pH during anesthesia was always stable at around 7.2. In other words, it was confirmed that oxygen was more abundant in blood than in the past. Therefore, the present invention can reliably prevent hypoxia, which tends to occur in the conventional inhalation anesthesia method.

[0030]

As is apparent from the above description, the method for inhaling or inhaling oxygen in animals according to the present invention and the double tube type endotracheal tube for animals used therefor have the following remarkable effects.

In the conventional single tube type endotracheal tube for humans, expiration is mixed with oxygen and anesthesia gas which are fed in and diluted, so that a high concentration of oxygen necessary for life saving does not reach the lungs. However, various inconveniences have been caused, such as that it takes time for the effect of the inhalation anesthetic to appear. The disadvantages are that an artificial expiratory passage and an inspiratory passage are separately formed in a trachea sealed with an inflatable balloon cuff, and expiration in both the left and right lungs is expelled from the expiratory passage, and the expiratory passage from the inspiratory passage. The oxygen inhalation or inhalation anesthesia method of the present invention, characterized in that unmixed fresh oxygen or oxygenated anesthetic gas is fed into both the left and right bronchi, can be completely and reliably eliminated.

In addition, the double tube type endotracheal tube for animals used for carrying out the method of the present invention is formed into an exhalation discharge tube using a conventional single tube type endotracheal tube for humans, and a fine inhalation tube is provided in this tube. By inserting the inlet tube, an artificial expiratory passage and an inspiratory passage can be separately formed.

Further, by making two hollow tubes having a semicircular cross section face to face to face each other to produce a double tube type endotracheal tube for animals, the appearance is a single tube tube, The expiratory passage and the inspiratory passage divided by are separately formed.

[0034] The mounting position of the inflatable balloon cuff in the double tube type endotracheal tube for animals is set at a position not less than 14 mm or more and not more than 20 cm from the trailing edge of the distal end opening, and the tube wall of the exhalation discharge tube in front of the balloon cuff. By providing a plurality of ventilation holes, the exhalation discharge performance of the endotracheal tube can be remarkably improved.

Therefore, the excellent exhalation discharge function of the double-tube type endotracheal tube for animals and the function of sufficiently supplying fresh oxygen and oxygenated anesthetic gas which does not contain exhaled air to the lungs are synergistic, and the present invention relates to the present invention. The method of oxygen inhalation or inhalation anesthesia of animals can dramatically improve the resuscitation survival rate of emergency patients. Similarly, anesthesia can be easily applied during general anesthesia, and the time required for surgery to be applied in a state where surgery can be performed can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a double-tube type endotracheal tube for animals of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view showing a modification of FIG. 2;

FIG. 4 is a perspective view showing another embodiment of the double tube type endotracheal tube for animals of the present invention.

FIG. 5 is a plan view showing a modification of FIG. 4;

FIG. 6 is a sectional view taken along line YY of FIG. 5;

FIG. 7 is a sectional view taken along the line ZZ of FIG. 5;

FIG. 8 is an explanatory view showing a use state of a conventional single tube type endotracheal tube for humans.

FIG. 9 is a plan view showing a conventional human single-tube endotracheal tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Single tube type endotracheal tube 2,12,12a, 12b Balloon cuff 3,13,13a Tip opening 4,14,14a Rear end opening 5 Chimney piece 6 Breathing snake tube 7 Intake snake tube 8 Trachea 9 Tracheal branch Part 10, 10a, 10b Double tube type endotracheal tube for animals 11, 11a, 11b Expiration discharge tube 15, 15a, 15b Vent hole 16 Side hole 17 Peak-like projection 18 Joint 19 Cap 20 Packing material 21 Intake / intake tube P For inhalation Passage S Exhalation passage

Claims (3)

[Claims] An expiratory discharge pipe and an inhalation inlet pipe are separately provided in a trachea sealed with an inflatable balloon cuff, and exhaled air in both the left and right lungs is discharged from the expiratory discharge pipe, and fresh air is supplied from the inspiratory inlet pipe. Oxygen inhalation or inhalation anesthesia for animals other than humans, characterized in that oxygen or oxygenated anesthesia gas is fed into the left and right bronchi. 2. An exhalation discharge tube having a shape that can be inserted into the trachea by being connected to an exhalation flexible tube of an inhalation anesthesia machine, and an exhalation discharge tube that is connected to an inhalation flexible tube of an inhalation anesthesia device. An endotracheal tube comprising an inhalation inlet pipe having a shape that can be inserted, wherein the distal end of the exhalation discharge pipe is obliquely cut to form a distal opening, and a rear edge of the distal opening is formed. An inflatable balloon cuff is attached to the rear of 14 mm or more and 20 cm or less, a plurality of ventilation holes are provided in a tube wall in front of the balloon cuff, and a horizontal hole is provided in a tube wall behind the balloon cuff. A double tube type endotracheal tube for animals, which is inserted into the exhalation discharge tube. 3. A hollow exhalation discharge pipe having a semicircular cross-section connected to an exhalation flexible pipe of an inhalation anesthesia machine, and a hollow inspiratory intake pipe having a semicircular cross-section connected to an inspiratory flexible pipe of an inhalation anesthesia apparatus. A tubular hollow tube having a partition wall in the longitudinal direction by joining the planes of both tubes face-to-face, and a distal end portion of the separated hollow tube. Is cut off diagonally to form a tip opening, and an inflatable balloon cuff is attached at least 14 mm to 20 cm behind the trailing edge of the tip opening, and a plurality of ventilation holes are provided in the tube wall of the exhalation discharge tube ahead of the balloon cuff. A double tube type endotracheal tube for animals, characterized by comprising: