WO2019142757A1 - Auxiliary tool and method for inserting endotracheal tube for mouse using same - Google Patents

Abstract

The purpose of the present invention is to provide an auxiliary tool capable of inserting an endotracheal tube reliably, quickly and easily into the trachea of a mouse without using an expensive instrument, and to provide a method for inserting an endotracheal tube for a mouse using the same. An auxiliary tool 1 of the present invention comprises: a shaft member 11 having a shaft body 110 having inside thereof a through hole 111 through which an endotracheal tube t is to be inserted; and a mask member 21 that is connected to one end of the shaft member 11 and is to be abutted against at least part of the larynx opening periphery in the pharynx. The mask member 21 has an opening 211 communicating with the through hole 111 of the shaft member 11, and is formed such that a delivery direction a2 of the endotracheal tube t through the opening 211 is at an acute angle with respect to the front end direction a1 of the shaft member 11.

Description

Aid and method of intubating endotracheal tube for mice using the same

The present invention relates to an aid and a method of intubating a mouse endotracheal tube using the same.

When conducting various tests on mice under the same conditions as future human application, there is a method of introducing an anesthetic gas and the like into mice using an endotracheal tube. As such a method, for example, there is known a technique in which an endotracheal tube is intubated into a trachea while inserting an endoscope into the pharynx of a mouse, and the gas is supplied through the endotracheal tube ( See, for example, Non-Patent Document 1).

According to the technique using such an endoscope, the position of the larynx can be accurately grasped using the image taken by a camera attached to the endoscope, and the endotracheal tube is It is excellent in that it can be intubated in the tube.

Kenjiro KONNO, et al., “New Visible Endotracheal Intubation Method Using the Endoscope System for Mice Inhalational Anesthesia”, J. Vet. Med. Sci, 2014, 76 (6), p. 863-868 Crotaz IR, "Initial feasibility investigation of the v-gel airway: an anatomically designed" "supprestive airway device for use in companion animal veterinary anaesthesia", veterinary Anaesthesia and Analgesia, 2010, 37, p. 579-580

However, in the technique using the conventional endoscope as described above, the cost for the endoscope apparatus is high, and the manipulation of the endoscope and the intubation of the endotracheal tube into the trachea require skill.

Here, as a method that does not use an expensive instrument, for example, a device obtained by modifying the supraglottic airway securing device (v-gel) (see, for example, Non-Patent Document 2) applicable to laryngeal masks applicable to animals such as rabbits. It is also conceivable to use it to intubate an endotracheal tube into the airway of the mouse.

However, the above-mentioned device originally merely covers the larynx and does not intubate the endotracheal tube, and additionally, the pharyngeal shape of the mouse is very small compared to a rabbit or the like, and the shape is not a mere similar shape. The mere modification of the above device can not be applied to the intubation of an endotracheal tube into a mouse.

In addition, the mouse may be excessively stressed due to an erroneous operation or the like, and there is a possibility that the mouse may be killed by being forcibly pushed.

The present invention has been made based on the circumstances as described above, and its object is to make it possible to intubate the endotracheal tube of a mouse reliably, quickly and easily without using expensive equipment. An auxiliary tool and an intubation method for an endotracheal tube for a mouse using the same.

Some aspects of the present disclosure are:
(1) An aid for guiding an endotracheal tube into the trachea of a mouse via the larynx,
A shaft member having a through hole through which the endotracheal tube is inserted;
A mask member connected to one end of the shaft member and abutting at least a part of the periphery of the laryngeal opening in the pharynx;
The mask member has an opening communicating with the through hole of the shaft member,
An auxiliary tool characterized in that a delivery direction of the endotracheal tube through the opening is formed at an acute angle with respect to a distal direction of the shaft member.
(2) The auxiliary tool according to the above (1), wherein the mask member has a deflection unit that deflects the advancing direction of the endotracheal tube.
(3) The tube according to the above (1), which is formed so as to allow the endotracheal tube to be inserted therein and communicate with the through hole of the shaft member and has a curved pipe member for deflecting the advancing direction of the endotracheal tube. Auxiliary equipment,
(4) The tip is located in the middle of the shaft body in the axial direction of the shaft member, and includes a projecting member protruding from the outer peripheral surface of the shaft body according to any one of (1) to (3) Auxiliary equipment,
(5) The auxiliary tool according to (4), wherein the projecting members are arranged to be symmetrical with respect to a virtual plane passing through the axis of the shaft member and the center of the opening.
(6) The shaft member has a marker at an outer peripheral portion of a predetermined distance along the proximal end direction of the shaft member from the end of the opening in the proximal direction, any of the above (1) to (5) Auxiliaries listed in paragraph 1 or
(7) Any one of the above items (1) to (6), wherein the delivery direction of the endotracheal tube through the opening is formed so as to be 4 ° or more and 30 ° or less with respect to the distal end direction of the shaft member And (8) a method of intubating an endotracheal tube for a mouse, which guides the endotracheal tube into the endotracheal space of the mouse through the larynx.
A first step of inserting the aid according to any one of (1) to (7) into the pharynx of the mouse from the tip direction of the aid;
After the first step, a second step of bringing a mask member into contact with the laryngeal opening in the pharynx;
After the second step, a third step of intubating the endotracheal tube into the trachea of the mouse via the auxiliary tool is provided.

In the present specification, the “tip direction” is a direction along the axial direction of the shaft member, and is the direction of the end where the mask member is provided with respect to the end where the mask member of the shaft member is not provided. Means Also, “proximal direction” means a direction along the axial direction of the shaft member and means the direction opposite to the distal direction. Also, “distal end” indicates the distal end of any member or site, and “proximal” indicates the proximal end of any member or site. The "predetermined distance" is defined as the length along the mouth and pharynx of the mouse and corresponds to the standard length between a specific part of the mouse body (for example, incisor teeth) and the laryngeal opening. Means the distance

The present invention provides an aid capable of reliably, quickly and easily intubating the endotracheal tube of the endotracheal tube without using an expensive instrument, and a method of intubating the endotracheal tube for a mouse using the same. Can be provided.

It is a schematic sectional drawing which shows the 1st Embodiment of this invention. It is a schematic plan view of FIG. It is the schematic for demonstrating the dimension of each part in the auxiliary tool of this invention, Comprising: (a) is sectional drawing, (b) has shown the top view, respectively. It is a schematic sectional drawing which shows the 2nd Embodiment of this invention. FIG. 5 is a schematic plan view of FIG. 4; FIG. 10 is a schematic plan view showing a third embodiment of the present invention, wherein (a) to (d) show an assisting tool provided with projecting members of various shapes. It is a schematic side view showing a 3rd embodiment of the present invention, and (a)-(f) show the auxiliary tool provided with the projection member of various shapes, respectively. It is the schematic which shows the use condition of FIG. 1, Comprising: (a) is a state which inserted the auxiliary tool in the intraoral area, (b) is a state which pressed the mask member of the auxiliary tool to the larynx, (c) is the endotracheal region. (D) shows a state in which an endotracheal tube is inserted into the trachea.

<Auxiliary tools>
The auxiliary tool according to one embodiment of the present invention is an auxiliary tool for guiding an endotracheal tube into the trachea of a mouse via the larynx, and includes a shaft body having a through hole through which the endotracheal tube is inserted. And a mask member connected to one end of the shaft member and in contact with at least a part of the periphery of the larynx opening in the pharynx, the mask member having an opening communicating with the through hole of the shaft member It is characterized in that the delivery direction of the endotracheal tube through the opening portion is formed to have an acute angle with respect to the distal direction of the shaft member.

The endotracheal tube applied to the auxiliary tool is a flexible tube that can be bent along the through hole of the auxiliary tool, and for example, gas such as anesthetic gas or oxygen is transmitted through the endotracheal tube. Supply air to the trachea or exhale from the trachea to the outside. The outer diameter of the endotracheal tube is about 0.8 mm to 1.2 mm.

Hereinafter, the first to third embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to only the embodiments described in the drawings.

First Embodiment
FIG. 1 is a schematic cross-sectional view showing a first embodiment of the present invention. The said auxiliary | assistant tool 1 is roughly comprised by the shaft member 11 and the mask member 21 as shown in FIG.

The shaft member 11 comprises a shaft body 110. The shaft member 11 may also have a marker 120.

The shaft main body 110 is a member having a through hole 111 through which the endotracheal tube t is inserted. Specifically, the shaft body 110 is formed in, for example, a substantially cylindrical shape so as to have a through hole 111 which penetrates along the direction of the axis of the shaft member 11 (the axis of the shaft body 110).

The dimensions of each part of the shaft body 110 are generally 15 mm to 20 mm in total length so that when the auxiliary tool 1 is inserted through the oral cavity of the mouse, the opening 211 of the mask member 21 described later reliably reaches the larynx opening. The outer diameter is usually 3 mm to 5 mm so that it can be easily inserted into the pharynx of the mouse. The inner diameter is usually 1 mm to 2 mm depending on the outer diameter of the endotracheal tube t.

The material constituting the shaft main body 110 is not particularly limited, but is preferably made of a flexible material from the viewpoint of being able to smoothly insert the auxiliary 1 along the pharynx, and polyester resin, salt Polyvinylated resins are more preferred, and polyester resins are even more preferred. Further, the shaft body 110 may be one in which a layer such as silicone resin is laminated on the outer periphery of a member formed using the above-mentioned material.

The marker 120 is a mark for grasping the position of the opening 211 of the mask member 21 in the pharynx of the mouse. The marker 120 is provided on the surface of the shaft body 110 and at an outer peripheral portion of a predetermined distance L4 (see FIG. 3) along the proximal direction of the shaft member 11 from the end p of the opening 211 in the proximal direction. It is done. As the marker 120, for example, a part or the whole circumference in the circumferential direction in the outer peripheral part is colored with a pigment or the like, and a shape such as a convex part or a recess around the part or the entire circumference in the circumferential direction in the outer peripheral part It is possible to employ one in which a typical feature portion is formed. In the present embodiment, a marker 120 (see FIG. 1 and FIG. 2) colored using a pigment is illustrated on the entire circumference of the outer peripheral portion.

Here, as the predetermined distance L4, for example, the same value as the average length between the incisor teeth and the laryngeal opening of a standard mouse can be adopted. In this case, the distance between the marker 120 and the end p of the mask portion 21 is preferably 11 mm or more and 12 mm or less, and more preferably 11.6 mm. Thus, by aligning the marker 120 with the incisor tooth, the opening 211 can be more accurately aligned with the laryngeal opening without looking at the inside of the pharynx.

The mask member 21 is connected to one end of the shaft member 11 and abuts on at least a part of the larynx opening periphery in the pharynx. As shown in FIG. 2, the mask member 21 has an opening 211 communicating with the through hole 111 of the shaft member 11. Specifically, the mask member 21 is, for example, fixed so that the proximal end surrounds the opening of the distal end of the shaft main body 110, extends from the periphery of the opening toward the distal direction, And a through hole 212 for insertion of the endotracheal tube t in communication with the through hole 111. A lumen 301 through which the endotracheal tube t can be inserted is formed by the through hole 212 and the through hole 111 described above.

The surface shape around the opening 211 of the mask member 21 is preferably formed to correspond to the shape around the larynx opening in the pharynx of the mouse, whereby the mask member 21 is stably seated in the larynx opening and the trachea The lumen 301 of the auxiliary tool 1 can be reliably conducted.

The dimensions of each part of the mask member 21 (see FIG. 3) are usually 2 mm to 11 mm in total length L1, 2 mm to 5 mm in maximum width L2, and 2 mm to 6 mm in maximum height L3 in consideration of the shape of the pharynx and larynx opening. is there. The opening 211 of the mask member 21 usually has a total length L5 of 4 mm to 6 mm and a maximum width L6 of 1 mm to 2 mm in consideration of the shape of the larynx opening.

The shape of the tip end portion of the mask member 21 is preferably a curved shape (a shape in which the tip end portion of the mask member 21 is not sharp when viewed from any direction, see FIGS. 1 and 2). As described above, since the shape of the tip of the mask member 21 is a curved shape, it is possible to reduce the stimulation on the sensory receptor of the mouse accompanying the contact of the mask member 21 (the tip of the mask member 21). For example, it is possible to suppress the occurrence of respiratory disorder and the like due to reflection.

As a material which comprises the mask member 21, a resin material etc. are mentioned, for example. Among these, as the above-mentioned material, a silicone resin and a urethane resin are preferable, and a silicone resin is more preferable, from the viewpoint of reducing the irritation due to the contact with the mucous membrane of the pharyngeal inner wall.

As a method of forming the mask member 21, for example, using a discharge device (not shown) in which a resin material before curing is loaded, the resin material discharged by the discharge device is applied to the tip of the shaft main body 110 and room temperature or heat A method of forming by curing, a method of mounting the tip of the shaft body 110 on a die (not shown), filling the resin material before curing around the opening of the shaft body 110 and thermally curing the same It can be adopted.

Here, in the auxiliary tool 1, the delivery direction a2 of the endotracheal tube t through the opening 211 is such that the delivery direction a2 of the endotracheal tube t is an acute angle (delivery angle θ <90 °, see FIG. 3) with respect to the tip direction a1 of the shaft member 11. Is formed. Thereby, when inserting the said auxiliary tool 1 in the intraoral area of a mouse | mouth, the endotracheal tube t delivered from the opening part 211 can be orient | assigned to the direction of a larynx.

The delivery direction a2 of the endotracheal tube t through the opening 211 is preferably 4 ° or more and 30 ° or less, more preferably 5 ° or more and 25 ° or less with respect to the distal end direction a1 of the shaft member 11 Preferably, it is more preferably 6 ° or more and 22 ° or less. As a result, the delivery direction a2 of the endotracheal tube t can be more accurately directed to the trachea direction, and the endotracheal tube t can be more reliably intubated into the trachea of the mouse.

The configuration for making the delivery direction a2 of the endotracheal tube t acute is not particularly limited. For example, as in the present embodiment, the mask member 21 has a deflection portion 31 that deflects the advancing direction of the endotracheal tube t. It may be done. Specifically, as shown in FIG. 1, for example, a raised portion 311 or the like formed on the inner periphery in the vicinity of the opening 211 of the mask member 21 can be employed as the deflection unit 31. The deflection unit 31 may be integral with or separate from the mask member 21.

Thus, by the mask member 21 having the deflecting portion 31, the auxiliary tool 1 is configured such that the advancing direction of the endotracheal tube t which has passed through the through hole 111 is the shaft member 11 by contact with the deflecting portion 31. The endotracheal tube t can be intubated into the trachea of the mouse with a simple configuration.

In addition, about the usage aspect of the said auxiliary tool 1, it mentions later by the term of <intubation method of the endotracheal tube for mice>.

As mentioned above, since the said auxiliary tool 1 is the said structure, when intubating the endotracheal tube t for mice in the trachea using the said auxiliary tool 1, the delivery direction a2 of the endotracheal tube t is a tip direction Since the endotracheal tube t can be inserted into the trachea via the larynx without entering the esophagus because it has an acute angle with respect to a1, the endotracheal tube t can be used without using an expensive instrument such as an endoscope. The tube can be intubated into the trachea of the mouse quickly and easily. Further, in the present embodiment, since the shaft member 11 has the marker 120, the opening 211 of the mask member 21 can be accurately aligned with the laryngeal opening of the mouse.

Second Embodiment
FIG. 4 is a schematic cross-sectional view showing a second embodiment of the present invention. The said auxiliary | assistant tool 2 is roughly comprised by the shaft member 11, the mask member 21, and the pipe member 52, as shown in FIG. The present embodiment differs from the first embodiment in that the pipe member 52 is provided. In addition, since the structure of the shaft member 11 and the mask member 21 is the same as that of the thing of 1st Embodiment, the same code | symbol is attached | subjected to an identical part and the detailed description is abbreviate | omitted. Moreover, the description in the section of <Method for intubating endotracheal tube for mice> described later is also used for the mode of use of the auxiliary tool 2.

The pipe member 52 is a curved member which is formed so as to allow the endotracheal tube t to be inserted therein, communicates with the through hole 111 of the shaft member 11, and deflects the advancing direction of the endotracheal tube t. In the present embodiment, the pipe member 52 has its proximal end inserted into the through hole 111 of the shaft body 110 and is fixed so that the outer periphery of the inserted pipe member 52 and the inner periphery of the shaft body 110 are in close contact. . Further, as shown in FIG. 5, the pipe member 52 is disposed such that the opening end surface 522 at the tip end faces the opening 211 of the mask member 21. In addition, the pipe member 52 has a substantially arc-like curved shape in the middle between the distal end and the proximal end such that the delivery direction a2 of the endotracheal tube t from the opening 211 is acute at the distal direction a1. Is formed. The through hole 521 of the pipe member 52 and the through hole 111 form a lumen 302 through which the endotracheal tube t can be inserted.

As a material which comprises pipe member 52, stainless steel, a titanium alloy, a cobalt chromium alloy etc. are mentioned, for example. Among them, stainless steel is preferable as a material to be configured with the pipe member 52, and SUS304 is more preferable, from the viewpoint of ease of preparation.

As mentioned above, since the said auxiliary tool 2 is the said structure, the front end direction a1 of the shaft member 11 is carried out so that the advancing direction of the endotracheal tube t which passed through the inside of the through-hole 111 may follow the curve shape of the pipe member 52. The endotracheal tube t can be intubated into the trachea of the mouse with a simple configuration.

Third Embodiment
6 and 7 are a schematic plan view and a schematic side view, respectively, showing a third embodiment of the present invention. The auxiliary tool 3 (3 m1 to 3 m10) is roughly configured by the shaft member 11, the mask member 21 and the projecting member 63, as shown in FIGS. The present embodiment differs from the first embodiment in that a projecting member 63 is provided. In addition, since the structure of the shaft member 11 and the mask member 21 is the same as that of the thing of 1st Embodiment, the same code | symbol is attached | subjected to an identical part and the detailed description is abbreviate | omitted. Moreover, the description in the section of <Method of intubating endotracheal tube for mouse> described later is also used for the usage mode of the auxiliary tool 3.

The projecting member 63 is a member whose tip is located in the middle of the shaft body 110 in the axial direction of the shaft member 11 and protrudes from the outer peripheral surface of the shaft body 110. For example, a part of the projecting member 63 may be fixed to the outer periphery of the shaft body 110 using an adhesive or the like, and may be formed to extend outward of the shaft body 110.

The specific shape of the projecting member 63 is, for example, a triangular shape (see the projecting member 63m1 of FIG. 6A) or a rectangular shape (the projecting member 63m2 of FIG. 6B) as a shape in plan view. See the following), in a shape that changes gradually in width (see the projection member 63m3 in FIG. 6 (c)), those projecting only on one side of the shaft body 110 (see the projection member 63m4 in FIG. 6 (d)), etc. As a shape in a side view, for example, a shape extending radially from the shaft body 110 (see the projecting members 63m5 to 63m8 in FIGS. 7A to 7D) and a shape circumscribing the shaft body 110 (see FIGS. 7A to 7D) 7 (e) and 7 (f) can be adopted. Here, the shape of the planar view and the shape of the side view exemplified above may be combined arbitrarily within the possible range.

The projecting members 63 are preferably arranged to be symmetrical with respect to an imaginary plane b passing through the axis of the shaft member 11 and the center of the opening 211 (FIGS. 6A to 6C (c). 7 (a), 7 (b) and 7 (d) to 7 (f)). Thereby, when inserting the said auxiliary tool 3 in the intraoral area of a mouse | mouth, the axis of the shaft member 11 can be closely approached as much as possible to the axial center of the pharynx, and the mask member 21 is seated stably by the pharyngeal opening. Can.

Further, in plan view, the maximum width of the projecting member 63 in the direction orthogonal to the axis of the shaft member 11 is preferably larger than the width of the tip of the projecting member 63 (see FIGS. 6A and 6C). . Thereby, the said auxiliary tool 3 can be smoothly inserted in the oral cavity of a mouse | mouth.

Further, the projecting member 63 is preferably formed in a flat shape (substantially flat shape) as a whole (see FIGS. 7A to 7C, and FIGS. 7E and 7F). . As a result, the projecting member 63 can be made to correspond to (follow along) the flat oral cavity shape of the cross section which is the feature of the mouse, and the mask member 21 can be seated on the pharyngeal opening more stably.

As mentioned above, since the said auxiliary tool 3 is the said structure, it can be stably seated in the oral cavity of a mouse | mouth.

<Method for intubating endotracheal tube for mice>
The method of intubating a mouse endotracheal tube according to an embodiment of the present invention is a method of intubating a mouse endotracheal tube for guiding the endotracheal tube into the trachea of a mouse via the larynx, and A first step of inserting the tip of the assisting tool into the pharynx of the mouse, a second step of bringing the mask member into contact with the periphery of the laryngeal opening in the pharynx after the first step, and And a third step of intubating the endotracheal tube into the trachea of the mouse through the aid.

Hereinafter, the intubation method will be described in detail. Here, as the assisting tool, the one described above in the first embodiment of the item of <assisting tool> will be described as an example with reference to FIG.

[First step]
In the first step, the auxiliary tool 1 is inserted into the throat m3 of the mouse m from the distal direction of the auxiliary tool 1. Specifically, as shown in FIG. 8A, after inserting the assisting tool 1 into the oral cavity m2 of the mouse m, if the assisting tool 1 has the marker 120, for example, the marker 120 is the mouse m Push the larynx m3 until the position of the incisor m1 is reached, or if the marker 120 is not provided, push the laryngeal m3 until the pressing resistance of the auxiliary 1 changes (increases), the auxiliary 1 is put in the proper position insert.

[The second step]
In the second step, after performing the above-mentioned first step, as shown in FIG. 8 (b), the mask member 21 is moved in the direction of the larynx m3, and the surface of the mask member 21 is around the larynx opening m5 in the pharynx m3. Abut on. At this time, at least a part of the mask member 21 may simply be in contact with the periphery of the larynx opening m5, and it is not necessary to completely cover the periphery of the larynx opening m5.

Here, it is preferable that the surface of the epiglottis m6 be supported such that the epiglottis m6 does not close the laryngeal opening m5 by bringing the surface of the mask member 21 into contact with the epiglottis m6. Thereby, the insertion of the endotracheal tube t described later into the trachea m7 can be performed more smoothly.

[Third step]
In the third step, after performing the second step described above, the endotracheal tube t is intubated into the trachea m7 of the mouse m through the auxiliary tool 1. Specifically, an endotracheal tube t is inserted from the proximal end opening 112 of the shaft member 11, and the endotracheal tube t is pushed forward in the order of the through hole 111 and the through hole 212 (see FIG. 8 (c)). The distal end of the tube t is intubated into the trachea m7 via the larynx m4 (see FIG. 8 (d)).

After intubation of the endotracheal tube t into the trachea m7, desired treatment such as supply of anesthetic gas or promotion of respiration is performed using, for example, a respirator connected to the endotracheal tube t. After performing the above-mentioned procedure, for example, the endotracheal tube t and the aid 1 are sequentially pulled out of the larynx m4, the pharynx m3 and the oral cavity m2 of the mouse m.

As described above, since the intubation method has the above configuration, when the endotracheal tube t for a mouse is intubated in the trachea m7 using the auxiliary tool 1, the delivery direction a2 of the endotracheal tube t is the distal direction a1. The endotracheal tube t can be intubated to the trachea m7 through the larynx m4 without entering the esophagus m8 because it has an acute angle with respect to the The tube t can be intubated in the trachea m7 of the mouse m reliably, quickly and easily.

The present invention is not limited to the configurations of the above-described embodiments, but is shown by the claims, and is intended to include all modifications within the meaning and range equivalent to the claims. Be done.

For example, although the first embodiment describes the auxiliary tool 1 having the deflecting portion 31 in the first embodiment, and the auxiliary tool 2 including the pipe member 52 in the second embodiment, the endotracheal tube through the opening 211 As long as the delivery direction a2 of t is formed to be an acute angle with respect to the distal direction a1 of the shaft member 11, an aid other than the aids 1 and 2 may be used.

Further, in the embodiment described above, the aids 1 to 3 including the shaft member 11 having the marker 120 have been described, but the aid may not have the marker.

Moreover, although the intubation method using the auxiliary tool 1 was described in the section of <Intubation method of endotracheal tube for mouse>, the auxiliary implement used in the intubation method of the present invention is the auxiliary tool of any aspect according to the present invention. For example, the auxiliary tool 3 can also be used. In this case, in the first step of the intubation method described above, it is preferable to insert the protruding member 63 into the pharynx m3 of the mouse m so as to be along the inner wall of the oral cavity m2.

1, 2, 3, 3 m1 to 3 m10 Auxiliary tool 11 Shaft member 110 Shaft body 120 Marker 21 Mask member 211 Opening 31 Deflecting portion 52 Pipe member 63, 63 m1 to 6 m10 Protruding member 111, 212, 521 Through hole b Virtual plane t Air Intratubular tube m mouse m3 larynx m4 larynx m5 laryngeal opening

Claims (8)

An aid for guiding an endotracheal tube into the trachea of a mouse via the larynx, wherein
A shaft member having a through hole through which the endotracheal tube is inserted;
A mask member connected to one end of the shaft member and abutting at least a part of the periphery of the laryngeal opening in the pharynx;
The mask member has an opening communicating with the through hole of the shaft member,
An auxiliary tool characterized in that a delivery direction of the endotracheal tube through the opening is formed at an acute angle with respect to a distal direction of the shaft member. The auxiliary tool according to claim 1, wherein the mask member has a deflecting unit which deflects the advancing direction of the endotracheal tube. The auxiliary tool according to claim 1, further comprising a curved pipe member which is formed in such a manner that the endotracheal tube can be inserted therethrough and which communicates with the through hole of the shaft member and which deflects the advancing direction of the endotracheal tube. The auxiliary tool according to any one of claims 1 to 3, further comprising: a protruding member located at a midpoint of the shaft main body in the axial direction of the shaft member and having a protruding end protruding from an outer peripheral surface of the shaft main body. The auxiliary tool according to claim 4, wherein the projecting member is arranged to be symmetrical with respect to a virtual plane passing through the axis of the shaft member and the center of the opening. The shaft member has a marker on an outer peripheral portion of a predetermined distance along the proximal direction of the shaft member from an end of the opening in the proximal direction, the marker according to any one of claims 1 to 5 Auxiliary equipment described. The assistance according to any one of claims 1 to 6, wherein the delivery direction of the endotracheal tube through the opening is formed so as to be 4 ° or more and 30 ° or less with respect to the distal end direction of the shaft member. Equipment. A method for intubating a mouse endotracheal tube, comprising: guiding an endotracheal tube into a trachea of a mouse via the larynx.
A first step of inserting the aid according to any one of claims 1 to 7 into the pharynx of the mouse from the distal direction of the aid;
After the first step, a second step of bringing a mask member into contact with the laryngeal opening in the pharynx;
And, after the second step, a third step of intubating the endotracheal tube into the trachea of the mouse through the auxiliary tool.

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