JPH0532135Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a moist heat exchanger for breathing, which allows a patient fitted with an endotracheal tube or a tracheostomy tube to inhale inspiratory gas at an appropriate temperature and humidity.

[Conventional technology]

The respiratory moist heat exchanger 1 is used by being attached to the outer proximal end of an endotracheal tube or tracheostomy tube 4 inserted into the trachea 3 of a patient 2, as shown in FIG.
It provides appropriate heat and moisture to the intake gas such as air in the atmosphere, creating a state similar to natural breathing. When the patient is able to breathe spontaneously, the opening end 1a for breathing gas in and out of the moist heat exchanger 1 is kept open to the atmosphere as shown in Figure 3, but when anesthesia or forced ventilation is performed, Opening end for breathing gas in and out 1
A breathing tube (not shown) is connected to a,
It is connected to an anesthesia machine, a respirator, etc. via this breathing tube.

Breathing moisture heat exchanger 1 used in this way
The conventional one had a structure as shown in FIGS. 4 and 5. That is, the moist heat exchange member 1b
a housing 1c containing a
The housing 1c was composed of an opening cylindrical body 1d for connecting an endotracheal tube or tracheostomy tube, which communicated at one end of the housing 1c, and an opening cylindrical body 1e for breathing gas in and out, which communicated at the other end of the housing 1c.

[Problem that the invention attempts to solve]

When this respiratory gas inlet/output opening end 1a is open to the atmosphere, positive and negative pressures are generated near this opening end 1a in synchronization with the patient's inhalation and exhalation, but unlike the conventional respiratory moist heat exchanger as described above, In this case, the end face of the breathing gas inlet/outlet opening cylinder 1e has a flat cross section simply cut perpendicular to the longitudinal direction of the cylinder, so if there is a thin cloth, for example, in the vicinity of the opening end 1a, If pieces of paper, plastic film, etc. were present, they would be sucked into the open end 1a during inspiration, blocking this open end 1a, interfering with the patient's natural breathing, and potentially endangering the patient's life. .

The present invention has been made in view of the above circumstances, and is an open end 1a of an opening cylinder 1e for breathing gas inlet and outlet.
Even if there is a thin cloth, piece of paper, plastic film, etc. near the opening end 1a, there is no risk of blocking the patient's natural breathing and safely and stably heating and humidifying the patient. The purpose of the present invention is to provide a moisture heat exchanger for breathing.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is characterized in that a side opening is provided in the vicinity of the opening of the breathing gas inlet/outlet opening cylinder of the breathing moisture heat exchanger.

Specifically, the present invention includes a housing that accommodates a moist heat exchange member, an open cylindrical body that communicates with the housing at one side and is used for connection to an endotracheal tube or a tracheostomy tube, and the like. On the other hand, in a breathing moisture heat exchanger comprising an opening cylinder for breathing gas inlet/output communicating with the inside of the housing, an opening is opened toward the side near the open end of the opening cylinder body for breathing gas inlet/output. The present invention provides a moisture and heat exchanger for breathing, characterized in that side openings are formed.

The side openings may be formed by cutting out the edge of the respiratory gas inlet/outlet opening in an uneven manner, or may have multiple side openings in the vicinity of the opening of the breathing gas inlet/outlet opening cylindrical body. It may also have holes.

[Effect]

In the breathing moist heat exchanger according to the present invention, since a side opening is provided near the opening of the opening cylinder for breathing gas, a thin cloth, piece of paper, etc. Even if there is a plastic film, etc. that is sucked into this open end and blocks it, the inspiratory gas will be introduced through the side openings, so there is no possibility of an accident that may interfere with the patient's natural breathing. can be avoided.

〔Example〕

This invention will be explained below with reference to illustrated embodiments.

In the embodiment shown in FIG. 1, the respiratory moisture heat exchanger 11 includes a housing 11c containing a moisture heat exchange member (for example, the embodiment shown in FIG. 3, or any other known embodiment); An opening cylinder 11d for connecting an endotracheal tube or a tracheostomy tube that communicates with one side of the housing 11c.
and a breathing gas inlet/outlet opening cylindrical body 11e communicating with the other side of the housing 11c,
A large number of grooves 11f are formed at regular intervals on the opening edge of the breathing gas inlet/outlet opening cylinder 11e. Therefore, this opening edge forms an uneven stepped portion along the circumferential direction.

There is no particular restriction on the shape of these grooves 11f, but when a breathing tube (not shown) is connected to the respiratory gas inlet/outlet opening cylinder 11d, it can be used without interfering with the connection and through the connection port of the breathing tube. It is preferable that the opening be completely closed and occupying an area of 50% or more of the opening area of the opening end face of the opening cylinder 11d.

FIG. 2 shows another embodiment of the present invention, which is completely the same as the embodiment of FIG. 1 except that the method of forming the side openings is different from that of the embodiment of FIG. 1. be. Therefore, the same parts will be given the same reference numerals and the details will be omitted.

The side opening shown in FIG. 2 has a large number of side holes 11g formed near the edge of the respiratory gas inlet/outlet opening cylindrical body 11d instead of the groove 11f in FIG. 1. Consisting of The size and position of this side hole 11g are such that it does not interfere with the connection of the breathing tube and is completely closed by the connection port of the breathing tube, as in the case of FIG. It is preferable to form it so that it occupies 50% or more of the opening area.

Note that the method of use of any of the above-mentioned respiratory moisture heat exchangers is exactly the same as that of conventional ones.

[Effect of idea]

In the breathing moist heat exchanger of the present invention, an opening such as a groove or a side hole that opens laterally (or toward the outer peripheral wall surface) is formed near the opening of the opening cylinder for breathing gas. Therefore, even if the end face of the open cylinder is covered by a cloth or film, there is no risk of interfering with the patient's natural breathing, and safe and stable heating and humidification can be achieved. can be carried out.

Further, since the side openings are arranged so as to be closed by connecting the breathing tube, they can be used not only during spontaneous respiration but also during anesthesia and artificial respiration. In addition, it is structurally simple and can be easily manufactured by a normal plastic injection molding method without increasing the number of manufacturing steps.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of a respiratory moisture heat exchanger according to the present invention, Fig. 2 is a side view of a respiratory moisture heat exchanger according to another embodiment of the present invention, and Fig. 3 is a side view of a respiratory moisture heat exchanger according to another embodiment of the present invention. FIG. 4 is a side view of a conventional respiratory moisture heat exchanger, and FIG. 5 is a cross-sectional view of the respiratory moisture heat exchanger shown in FIG. 4. In the figure, 1... Moist heat exchanger for breathing, 1a... Opening end for breathing gas, 1b... Moist heat exchange member, 1c
...housing, 1d... tracheostomy tube connection opening cylindrical body, 1e... opening cylindrical body for breathing gas entry and exit, 2... patient, 3... trachea, 4... tracheostomy tube, 11... for breathing Humid heat exchanger, 11c...
Housing, 11d... tracheostomy tube connection opening cylindrical body, 11e... opening cylindrical body for breathing gas entry and exit, 11f... groove, 11g... side hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A housing containing a heat-and-moisture exchange member, and an open cylindrical body that communicates with the housing at one end and is used for connection to an endotracheal tube or tracheostomy tube, etc. , a breathing moisture heat exchanger comprising: a breathing gas inlet/outlet opening cylinder communicating with the inside of the housing on the other side of the housing; A moist heat exchanger for breathing, characterized in that a side opening is formed that opens towards the user. (2) The respiratory moisture heat exchanger according to claim 1, wherein the side opening is formed by cutting out the edge of the breathing gas inlet/output opening end in an uneven shape. (3) The respiratory moisture heat exchanger according to claim 1, wherein the side opening is comprised of a plurality of side holes bored near the opening of the respiratory gas inlet/outlet opening cylindrical body. .