JPH07116256A - Ventilation pipeline of respirator - Google Patents

Abstract

PURPOSE:To make compact connection of an inhalating pipe and exhalating pipe and to facilitate handling of the inhalating pipe and the exhalating pipe without applying an excessive flow passage resistance to the gas flowing in the vent pipeline. CONSTITUTION:This vent pipeline 46 consists of a main pipe part 47 and a branch part 48 successively disposed at this main pipe part 47. This main pipe part 47 is composed a double pipes formed by arranging an inside pipe 50 in an outside pipe 49. This branch part 48 consists of a branch part outside pipe 51 successively disposed at its one end in the outside pipe 49 and a branch part inside pipe 52 successively disposed at its one end in the inside pipe 50. The branch part outside pipe 51 consists of a pair of base parts 53, 54 which are branched from the outside pipe 49 and extend in a successively parting direction and two branch pipes 57, 58 consisting of a pair of front ends 55, 56 which are curved from a pair of these base parts 53, 54 and extend parallel with the main pipe part 47. The branch part inside pipe 52 is fixed through a branch pipe 57 from the successively provided part of the inside pipe 50 to the inside surface at the front end 55 of the branch pipe 55 via an inside pipe mounting member 59 in an airtight state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation line of a breathing apparatus represented by an anesthetic gas supply apparatus.

[0002]

2. Description of the Related Art As is well known, various respiratory devices including an oxygen supply device are used as a device for affecting a respiratory system of a patient by administering a certain gas. A typical example is an anesthetic gas supply device. Hereinafter, the breathing apparatus will be described by taking an anesthetic gas supply device as an example. An anesthetic gas supply device supplies a mixed gas of an anesthetic and oxygen (hereinafter, this mixed gas is referred to as an anesthetic gas) to the human body. It consists of First, the ventilation conduit will be described. FIG. 2 shows an example of the ventilation conduit (provided in Japanese Patent Publication No. 57-35668). The ventilation pipe line 1 shown in this figure connects a double pipe of an outer pipe 2 and an inner pipe 3 which are both flexible, and connects the outer pipe 2 and the inner pipe 3 to an intake pipe and an expiratory pipe of an anesthetic gas supply unit. And a connecting pipe 4 for An intake / expiration part 5 is attached to one end of the outer pipe 2, one end of the inner pipe 3 is located near the inside of the intake / expiration part 5 as a free end, and the connecting pipe 4 has an outer pipe attachment part 6 A pipe mounting portion 7, an outer pipe communication hole 8 and an inner pipe communication hole 9 are provided. An outer pipe connecting portion 10 is fixed to the other end of the outer pipe 2, and the other ends of the outer pipe connecting portion 10 and the inner pipe 3 are attached to the outer pipe attaching portion 6 and the inner pipe attaching portion 7, respectively. Has been. Here, the outer pipe communication hole 8 is the inner pipe 3
Is formed in a direction orthogonal to the main passage 4a. Therefore, as will be described later, when the inspiratory pipe is connected to the inner pipe 3 and the expiratory pipe is connected to the outer pipe 2, the inspiratory passage 11 is not bent in the connecting pipe 4, but the expiratory passage 12 is bent at a right angle. To be It should be noted that a partition wall 13 having an appropriate through hole is provided inside the inspiratory / expiratory part 5, and the partition wall 13 is formed separately from the inspiratory / expiratory part 5.

Next, the anesthetic gas supply unit will be described. FIG. 3 is a diagram showing the overall configuration of the anesthetic gas supply device. The anesthetic gas supply unit 20 shown in this figure is configured to have an anesthetic gas generation unit 21 and a carbon dioxide gas absorber 22, and is used by connecting the above-mentioned ventilation pipe line 1. Anesthetic gas generator 21
Has a supply port 23, and the carbon dioxide absorber 22 has an inflow port 24.
And an outlet 25 and a carbon dioxide absorbent 26 inside
The outlet 25 is connected to the supply port 23 of the anesthetic gas generator 21 by a communication pipe 27. Reference numeral 28 denotes a flexible tube portion, which is composed of an inspiratory tube 29 and an expiratory tube 30, one end of the inspiratory tube 29 is connected to the inner tube 3 in the connecting pipe 4 of the ventilation conduit 1, and the other end thereof is the flow of the carbon dioxide gas absorber 22. The outlet 25 is connected to a communication portion with a communication pipe 27 connected to the supply port 23 of the anesthetic gas generation unit 21, and one end of the expiratory pipe 30 is connected to the outer pipe 2 in the connecting pipe 4 of the ventilation pipe line 1. The other end is connected to the inflow port 24 of the carbon dioxide gas absorber 22.
Here, as can be seen from the structure of the connecting pipe 4 described in the description of the ventilation pipe 1, the intake pipe 29 and the exhalation pipe 30 are connected to the connecting pipe 4 of the ventilation pipe 1 in directions orthogonal to each other. (See FIG. 2). A breathing assistance bag 31 is attached to a part of the expiratory tube 30, a pop-off valve 32 is provided at an upper end of the breathing assistance bag 31, and a small hole 33 is provided at a tail end thereof, and excess gas is discharged from these. It Reference numeral 34 is an inhalation valve, and 35 is an exhalation valve, and the action of these two valves directs the gas flow in one direction as indicated by the arrow in the figure.

The anesthetic gas generated from the anesthetic gas generating section 21 reaches the inspiratory / expiratory section 5 from the communication tube 27 through the inspiratory tube 29 and the inner tube 3 as the inspiratory passage 11 and is sent to the human body of the patient. The exhalation from the human body is the passage between the outer tube 2 and the inner tube 3, the exhalation tube 30.
After being partially discharged by the breathing assistance bag 31 as the expiratory passage 12, the carbon dioxide gas absorber 22 enters, where only carbon dioxide gas is absorbed, and the remaining anesthetic gas produces a shortage of anesthetic gas. It is supplied from the part 21 and again sent to the human body through the above-mentioned passage.

[0005]

By the way, in the conventional ventilation pipe line 1, in the connecting pipe 4, the anesthetic gas flowing from the intake pipe 29 to the inner pipe 3 does not suddenly change the direction of the intake passage 11. Therefore, it does not receive a large flow resistance, but expiratory air discharged from the passage between the outer tube 2 and the inner tube 3 to the expiratory tube 30 receives a large flow resistance because the direction of the expiratory passage 12 is bent at a right angle. There was a problem. Further, since the outer pipe communicating hole 8 and the inner pipe communicating hole 9 in the connecting pipe 4 are arranged, the inspiratory pipe 29 and the expiratory pipe 30 must be connected to each other in a direction orthogonal to each other, so that the entire device is installed. There is also a problem in that a wide space is required and the handling of the inspiratory tube 29 and the expiratory tube 30 is also inconvenient.

The present invention has been made in view of the above circumstances, and does not give excessive flow resistance to the gas flowing inside the ventilation pipe, and the intake pipe and the expiratory pipe are compact. It is an object of the present invention to provide a ventilation conduit of a breathing apparatus that can be connected to the air intake pipe and the intake pipe and the expiratory pipe can be easily handled.

[0007]

According to a first aspect of the present invention, there is provided a ventilation conduit for a breathing apparatus, comprising: a main portion having one end portion connected to an inspiratory / expiratory portion side; and the other end portion of the main portion. The main pipe part is configured as a double pipe in which an inner pipe is arranged inside an outer pipe, and one end of the branch part is outside the branch portion connected to the outer pipe. A pipe and a branch inner pipe arranged in the branch outer pipe, one end of which is connected to the inner pipe, and the branch outer pipe extends in a direction in which the outer pipe branches from the outer pipe and gradually separates from the outer pipe. A pair of base parts, and two branch pipes made up of a pair of tip parts that are bent from the pair of base parts and extend parallel to the main pipe part, and the branch part inner pipe is formed from the continuous part with the inner pipe. It passes through one of the pair of branch pipes, and is fixed in an airtight state to the inner surface of the distal end portion of the one branch pipe via an inner pipe mounting member. A passage from the tip of one of the branch pipes to the intake / expiration part side through the branch inner pipe and the inner pipe, and the branch outer pipe and the outer pipe from the other tip of the branch pipe. It is characterized in that either one of the passages through which it reaches the inhalation / expiration part side is an inhalation passage and the other is an exhalation passage.

[0008]

In the ventilation pipe of the breathing apparatus according to the first aspect of the present invention, since the directions of both the intake passage and the expiratory passage do not suddenly change over the entire length of the ventilation pipe, the gas flowing in each of them is not changed. Does not have its flow direction bent sharply. Further, since the pair of tips are located in parallel in the ventilation pipe and the inspiration tube and the expiratory tube are connected to the pair of tips, the inspiration tube and the expiratory tube can be connected in the parallel direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the ventilation pipe of the breathing apparatus of the present invention will be described below with reference to FIG. In addition, here, an embodiment in which the ventilation conduit according to the present invention is connected to the anesthetic gas supply unit 20 of the breathing apparatus shown in FIG. 3 will be described. The ventilation pipe 40 shown in FIG. 1 includes an outer pipe 41 and an inner pipe 4.
The inhalation pipe 43 which is composed of two and is connected to an inhalation / expiration unit which is not shown in FIG. 1, the inhalation pipe 29 which is connected to the anesthetic gas supply unit 20, the exhalation pipe 30, and the ventilation pipe 43 which is an inspiration pipe 29 and a ventilation line 46 connected to the expiratory tube 30. The ventilation pipe line 46 includes a main pipe portion 47 and a branch portion 48 that is connected to the main pipe portion 47.
7 is configured as a double pipe in which an inner pipe 50 is arranged inside an outer pipe 49, and a branch portion 48 has a branch outer pipe 51 whose one end is connected to the outer pipe 49 and a branch outer pipe 51. The inner pipe 52 is arranged inside and has one end connected to the inner pipe 50. The branch portion outer pipe 51 has a pair of base portions 53 and 54 that branch from the outer pipe 49 and extend in a direction in which they are gradually separated from each other, and a pair of distal ends that bend from the pair of base portions 53 and 54 and extend in parallel with the main pipe portion 47. Two branch pipes 5 consisting of parts 55 and 56
It consists of 7, 58. The branch inner pipe 52 is the inner pipe 50.
And the tip portion 55 of the branch pipe 57 through the branch pipe 57 from the connecting portion with
It is fixed to the inner surface in an airtight state via an inner pipe mounting member 59. The ventilation pipe line 46 includes a passage extending from the tip of the branch pipe 57 to the intake / expiration part side through the branch inner pipe 52 and the inner pipe 50, and the tip of the branch pipe 58 to the branch outer pipe 51 and the outer pipe. One of the passages passing through the inside of the pipe 49 (outside the inner pipe 50) to the side of the inspiratory / expiratory part is used as the inspiratory passage 11, and the other is used as the expiratory passage 12. An outer pipe mounting portion 60 for connecting the outer pipe 41 of the ventilation pipe 43 is provided on the outer periphery of the end of the main pipe portion 47, and the tip portions 55 and 56 are provided at the front end portions 55 and 56.
9. The diameter is slightly reduced (taper about 1/40) toward the end to connect to the expiratory tube 30, so that the inner tube mounting member 59 can be securely attached to the inner surface of the distal end 55 of the branch tube 57. The insertion member 61 is arranged for the sake of simplicity. The ventilation pipe line 46 is manufactured, for example, by a blow molding method using a material such as plastic. The shape of each part is, for example, 125 m from the tip of the main pipe portion 47 to the tip of the branch pipes 57 and 58.
m, the outer diameter of each pipe is 23 mm, the wall thickness is 1 mm, and the central axes of both pipes at the tips of the branch pipes 57 and 58 are 60 mm, and the base portions 53 and 54 of the branch pipes 57 and 58 intersect. The angle is 60 °.

The ventilation conduit 40 is used as follows. The outer pipe 41 of the ventilation pipe 43 is connected to the outer pipe 49 of the ventilation pipe 46, and the inner pipe 42 of the ventilation pipe 43 is extended as it is to form an inner pipe 50 of the ventilation pipe 46 and an inner pipe as a branch inner pipe 52. It is connected to the mounting member 59. The configuration at the other end of the ventilation pipe line 43 formed of the outer pipe 41 and the inner pipe 42 is the same as that of FIG. 2, and the intake / expiration unit 5 is attached to the other end of the outer pipe 41. The other end is located near the inside of the inspiratory / expiratory part 5 as a free end, and inside the inspiratory / expiratory part 5 is provided a partition wall 13 in which an appropriate through hole is formed. The end 55 of the ventilation conduit 46 is connected to the end of the inspiratory tube 29, and the other end 56 is connected to the end of the expiratory tube 30. The configuration of the anesthetic gas supply unit disposed on the other end side of the inspiratory tube 29 and the expiratory tube 30 may be that conventionally used, and as shown in FIG. 3, the anesthetic gas generating unit 21 and the carbon dioxide gas absorption unit Device 22 and back 3 for breathing assistance
1 is connected to the intake valve 34 and the exhalation valve 35. In addition, here, the intake pipe 2 is provided by the ventilation pipe line 46.
9 is connected to the inner pipe 42 of the ventilation pipe 43, and the intake / expiration unit 5 is connected.
An inspiratory passage 11 for supplying anesthetic gas to the
The case where 0 is connected to the outer pipe 41 to form and use the expiratory passage 12 for discharging the exhaled air from the inhalation / expiration part 5 has been described. However, the inspiratory pipe 29 is connected to the outer pipe 41 to form the inspiratory passage 11. , The exhalation passage 12 by connecting the exhalation pipe 30 to the inner pipe 42
Can be formed and used, and may be appropriately used.

According to the ventilation line of the breathing apparatus as described above, the directions of both the inspiration passage 11 and the expiration passage 12 do not suddenly change over the entire length of the ventilation circuit, so that the anesthetic gas flowing through the inside of the ventilation passage does not change. And exhaled air does not experience significant flow resistance. The pressure loss measured by the connection pipe 4 of FIG. 2 and the ventilation pipe line 46 shown in this embodiment, which have been conventionally used in FIG. 4, is given to the gas discharged through the passage between the outer pipe and the inner pipe. Indicates a value. In the experiment, both the connecting pipe 4 and the ventilation pipe 46 have the inner pipes 3 and 5 inside.
The openings leading from the inner pipe to the intake pipe 29 are closed while 0 and 52 are left, and a predetermined amount of air is sent from the joint with the outer pipe 2 or the ventilation pipe passage 43 to reduce the pressure in the inflow part and the outflow part. The pressure loss was measured and the pressure loss was calculated. As shown in FIG. 4, it is understood that the value of the flow path resistance of the ventilation pipe line 46 of the present embodiment exerted on the air flow is much smaller than that of the connecting pipe 4 which has been conventionally used. Further, since the tip portions 55 and 56 are positioned in parallel in the ventilation pipe line 46 and the inspiratory tube 29 and the expiratory tube 30 are connected to the pair of distal end portions 55 and 56, the inspiratory tube 29 and the expiratory tube 30 are parallel to each other. Can be connected from any direction, and the entire piping can be compactly assembled,
The inspiratory tube 29 and the expiratory tube 30 can be easily handled. This is extremely advantageous especially when using the breathing apparatus in a narrow space such as in an ambulance. Further, the ventilation pipe line 46 is easy to manufacture due to its structure, and not only can the weight thereof be reduced as compared with the conventionally used communication pipe 4, but it can also be provided at a low cost.

[0012]

As described above, according to the ventilation conduit of the breathing apparatus of the present invention, the following effects can be obtained. That is, since the directions of both the intake passage and the expiratory passage do not suddenly change over the entire length of the ventilation circuit, the gas flowing inside does not receive a large flow resistance. Further, since the pair of tips are positioned in parallel in the ventilation pipe and the inspiration tube and the expiratory tube are connected to the pair of tips, the inspiration tube and the expiratory tube can be connected in the parallel direction. The entire unit is compact and the handling of the inspiratory and expiratory tubes is easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a ventilation line of a breathing apparatus that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional ventilation conduit.

FIG. 3 is a schematic configuration diagram of an anesthetic gas supply device using a ventilation conduit.

FIG. 4 is a table showing measured values of pressure loss of fluid in a conventional connecting pipe and a ventilation pipe which is an embodiment of the present invention.

[Explanation of symbols]

 1 Ventilation Pipeline 2 Outer Pipe 3 Inner Pipe 4 Connection Pipe 11 Inhalation Passage 12 Expiration Passage 20 Anesthesia Gas Supply 21 21 Anesthesia Gas Generation 22 Carbon Dioxide Absorber 29 Inspiration Pipe 30 Exhalation Pipe 31 Breathing Support Bag 34 Inhalation Valve 35 Expiration Valve 40 Vent pipe 41 Outer pipe 42 Inner pipe 43 Vent pipe line 46 Vent pipe line 47 Main pipe part 48 Branch part 49 Outer pipe 50 Inner pipe 51 Branch part outer pipe 52 Branch part inner pipe 53 Base part 54 Base part 55 Tip part 56 Tip Part 57 Branch pipe 58 Branch pipe 59 Inner pipe mounting member 60 Outer pipe mounting part

Claims (1)

[Claims] 1. A main portion having one end portion serving as a connection portion to the inspiratory / expiratory portion side, and a branch portion connected to the other end of the main portion, the main portion being external. It is configured as a double pipe in which an inner pipe is arranged inside the pipe, and the branch portion is arranged inside the branch portion outer pipe in which one end thereof is connected to the outer pipe and inside the branch portion outer pipe, and one end of the branch portion is inside the inner pipe. The branch outer pipe comprises a pair of inner pipes connected to the pipe, and the branch outer pipe is a pair of bases that branch from the outer pipe and extend in a direction in which the outer pipes are gradually separated from each other, and the main pipe is bent from the pair of bases. Consisting of two branch pipes consisting of a pair of tip portions extending in parallel with each other, wherein the branch portion inner pipe passes through either one of the pair of branch pipes from the continuous portion with the inner pipe, It is fixed to the inner surface of the tip portion in an airtight state via an inner pipe mounting member, and extends from the tip portion of the one branch pipe to the branch inner pipe and And a passage extending from the other end of the branch pipe to the intake / expiration portion side through the branch outer pipe and the outer pipe. A breathing conduit for a breathing apparatus, characterized in that one is an inhalation passage and the other is an exhalation passage.