WO2020095721A1

WO2020095721A1 - Medical suction machine

Info

Publication number: WO2020095721A1
Application number: PCT/JP2019/041933
Authority: WO
Inventors: 善悦鈴木; 近藤　正芳; 尚金澤
Original assignee: 住友ベークライト株式会社
Priority date: 2018-11-09
Filing date: 2019-10-25
Publication date: 2020-05-14
Also published as: CN216169074U; JP7293616B2; JP2020075039A

Abstract

Provided is a medical suction machine capable of keeping the inside of a negative pressure container more clean. The medical suction machine (1) is designed to suck a discharged fluid using the negative pressure generated by the negative pressure container (2). The medical suction machine (1) is provided with: the negative pressure container (2); an air discharge member (4) which is connected to the negative pressure container (2) and discharges air to the outside; and a storage container (3) which is connected to the negative pressure container (2) and has a storage section for storing the discharged fluid. A filter (10) which prevents liquids and solids from passing therethrough but transmits the air is provided in a path of the air extending from the inside of the storage container (3) to the inside of the negative pressure container (2).

Description

Medical suction device

The present invention relates to a medical suction device including a filter.
The present application claims priority based on Japanese Patent Application No. 2018-212650 filed in Japan on Nov. 9, 2018, and the content thereof is incorporated herein.

When a body fluid such as blood or exudate (also referred to as drainage liquid) is sucked and discharged from a wound of a human body through a tube, a storage container that stores the drainage liquid and the drainage liquid that is connected to the storage container BACKGROUND ART A medical suction device including a negative pressure container that generates a negative pressure for suction is generally used.

For example, in Patent Document 1, a storage container for storing drainage (described as a drainage container in the same document), a storage container and a suction regulator are connected to make the inside of the storage container a negative pressure and a negative pressure. There is disclosed a medical suction device (described in the same document as a drainage suction device) including a negative pressure container (described in the same document as a water sealer) capable of confirming the state.
The negative pressure container described in the document is connected to the storage container through a pipe. Then, the negative pressure container contains therein water for dipping the tip of the pipe therein, and the negative pressure generated inside by the suction regulator sucks the air in the container through the pipe. Due to this suction, a predetermined negative pressure corresponding to the internal pressure of the patient's body cavity is generated in the container. The suction force generated in the accommodating container is monitored in the negative pressure container as a generation state of bubbles discharged from the tip of the pipe into the water sealing liquid (water).

Japanese Unexamined Patent Publication No. 10-295803

In the medical suction device described above, drainage was not allowed to enter the negative pressure container from the storage container through the pipe, but was allowed. Therefore, for example, when the storage container is accidentally tilted, it is assumed that drainage may flow from the storage container into the negative pressure container through the pipe, and there is room for improvement in the cleanability of the negative pressure container.

The present invention has been made in view of the above problems, and an object thereof is to provide a medical suction device capable of keeping the inside of a negative pressure container cleaner.

The medical suction device of the present invention is a medical suction device that sucks drainage by negative pressure formed by a negative pressure container, and is connected to the negative pressure container and the negative pressure container to supply air to the outside. An air exhaust unit for exhausting air, and a storage container having a storage unit that is connected to the negative pressure container and stores the drainage, and the air from the inside of the storage container to the inside of the negative pressure container. A filter that allows the air to pass through while blocking the passage of liquids and solids is provided on the path.

The medical suction device of the present invention can keep the inside of the negative pressure container cleaner.

It is a perspective view showing the medical suction tool concerning this embodiment. It is a bottom view of a bottle cap. It is a figure which shows the cross section around a bottle cap, and is a figure which shows the III-III cross section of FIG. It is an expanded sectional view which expands and shows a section of a filter concerning this embodiment. It is an expanded sectional view which expands and shows a section of a filter concerning a modification.

Hereinafter, an embodiment of a medical suction device of the present invention will be described with reference to the drawings.
The embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, and arrangements of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.
Further, in all the drawings, the same components are denoted by the same reference numerals, and the duplicated description will be appropriately omitted. Hereinafter, the “vertical direction” refers to the vertical direction in a state where the medical suction device 1 is erected as shown in FIG.

<Outline>
First, an outline of the medical suction device 1 according to the present embodiment will be described mainly with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a medical suction device 1 according to this embodiment, and FIG. 2 is a bottom view of a bottle cap 9.
The medical suction device 1 according to the present embodiment suctions drainage by the negative pressure formed by the negative pressure container 2. The medical suction device 1 includes a negative pressure container 2, an exhaust unit (exhaust member 4) that is connected to the negative pressure container 2 and exhausts air to the outside, and a housing that is connected to the negative pressure container 2 and stores drainage. And a container 3 having a portion 3e.
A filter 10 that allows air to pass through while blocking passage of liquids and solids is provided on the air path from the inside of the storage container 3 to the inside of the negative pressure container 2.

Since the filter 10 is provided on the air path from the inside of the accommodating container 3 to the inside of the negative pressure container 2, the accommodating container 3 is accidentally tilted and the normal use state (standing state) is maintained. It is possible to prevent the drainage stored in the storage container 3 from moving to the negative pressure container 2 even in a different state (falling down state).
In this way, by suppressing the movement of the drainage liquid from the storage container 3 to the negative pressure container 2, for example, when the negative pressure container 2 is provided with the balloon 5, the balloon 5 comes into contact with the drainage liquid and deteriorates. This can be prevented, and the negative pressure container 2 can be kept clean. Further, it is possible to prevent the drained liquid from further leaking (jetting) to the outside via the negative pressure container 2.

<Structure of each part>
Next, with reference mainly to FIG. 3 in addition to FIGS. 1 and 2, the configuration of each part of the medical suction device 1 will be described. FIG. 3 is a view showing a cross section around the bottle cap 9, and is a view showing a cross section taken along the line III-III of FIG. 2.
The negative pressure container 2 includes a balloon 5 for confirming the pressure state. A cap 2a is attached to the lower portion of the negative pressure container 2 so that the air in the negative pressure container 2 can communicate with the outside to remove the air. Further, the balloon 5 is disposed inside the negative pressure container 2 by the cap 2 a.
The negative pressure container 2 and the storage container 3 are internally connected by a connection tube 6.

The housing container 3 has a housing body 3d having a housing portion 3e and a connection lid (connection boss 9a) that covers the opening of the container body 3d and is connected to the negative pressure container 2 via the connecting tube 6. And a bottle cap 9).
As shown in FIG. 1, the bottle cap 9 has a liquid collection port 9b protruding upward. A tube (not shown) is connected to the liquid collection port 9b of the storage container 3, so that the storage container 3 can store the drainage. A clamp member 3b is attached to the liquid collection port 9b, and the clamp member 3b closes the flow path connected to the liquid collection port 9b, thereby stopping the inflow of drainage liquid from the human body into the storage container 3. It is configured to be possible.

The storage container 3 (the container body 3d side of the bottle cap 9) is provided with a filter mounting portion 9d to which the filter 10 is mounted. The filter attachment portion 9d has a step portion to which the peripheral edge of the disk-shaped filter 10 is adhered (or welded), is formed in a circular shape in bottom view, and is formed so as to project downward from the surroundings. There is.

As shown in FIG. 3, a return projection 9e is formed around the connection boss 9a on the surface of the bottle cap 9 on the housing portion 3e side so as to project to the housing portion 3e side (filter 10 side). The return protrusion 9e is for suppressing the drainage of the storage container 3 to the connecting tube 6 side when the container 3 is tilted down and passes through a vent hole 10a described later to the connecting tube 6 side of the filter 10. is there. The return protrusion 9e is formed in a circular shape (annular shape) in cross section, and is formed so as to protrude from the periphery of the through hole penetrating the connection boss 9a toward the accommodation portion 3e.
The return protrusions 9e allow air to pass between the connection boss 9a and the vent hole 10a, while suppressing the drainage of the drainage liquid flowing from the vent hole 10a to the connecting tube 6.
In addition, a cylindrical inner boss 9c connected to the liquid collection port 9b is formed on the surface of the bottle cap 9 on the accommodation portion 3e side so as to project toward the accommodation portion 3e side (downward).

The exhaust member 4 is for exhausting the air in the medical suction device 1 (negative pressure container 2) to the outside to make the inside of the negative pressure container 2 into a negative pressure state. A negative pressure container side one-way valve (not shown) is provided on the negative pressure container side and the exhaust port side. The exhaust member 4 has elasticity and is configured to be deformable into a natural state and a compressed state compressed from the natural state.

<About filters>
The filter 10 is attached to the filter attachment portion 9d and is arranged on the container body 3d side of the bottle cap 9.
Since the filter 10 is attached to the bottle cap 9, the filter 10 can be easily arranged in the storage container 3 by attaching the bottle cap 9 to the container body 3d. The filter 10 disposed in the storage container 3 is disposed so as to separate the internal space of the connection tube 6 that connects the negative pressure container 2 and the storage container 3 from the internal space of the storage container 3. ..

The filter according to the present invention is not limited to the filter 10 attached to the bottle cap 9 as long as it is provided on the air path from the inside of the storage container 3 to the inside of the negative pressure container 2.
For example, the filter may be provided inside the connecting tube 6, and the connecting tube 6 may be configured to be divided, and a filter (not shown) may be provided between the connecting tubes to connect the divided members to each other. It may be provided inside.
Furthermore, the filter may be attached to the container body 3d when the bottle cap 9 is not provided, and the filter may be attached to the connection tube 6 and the negative pressure inside the negative pressure container 2. You may make it arrange | position in the position which separates from the internal space of the container 2.

The filter 10 is formed with a vent hole 10a having a diameter larger than the average hole diameter of the filter 10. The “average pore diameter of the filter 10” is specifically the average pore diameter of a large number of pores provided in the porous material 10d described later, and for example, the portion of the filter 10 in which the vent holes 10a are not formed is A value calculated by measuring with the mercury penetration method using a cut-out test piece.
The filter 10 does not necessarily need to have the vent hole 10a. However, since the ventilation hole 10a is formed in the filter 10, it becomes easy to avoid complete loss of ventilation performance when a part of the filter 10 is clogged with drainage, and the subsequent drainage operation is performed. It will be easier to continue.

The ventilation hole 10a of the filter 10 is formed on an imaginary line L extending upward through the center of the housing portion 3e when the housing container 3 shown in FIG. 1 is upright.
In the "state in which the storage container 3 stands up", in addition to the state in which the storage container 3 stands up, for example, a part of the storage container 3 is hung on a part of a shelf beside the bed, and the storage container 3 stands upside down. Including a person who is in the same posture as when standing upright.
In this way, since the ventilation hole 10a is formed on the imaginary line L extending upward through the center of the accommodation portion 3e of the accommodation container 3, when the accommodation container 3 is tilted in any direction. However, it is possible to make it difficult for the drainage liquid to reach the vent hole 10a.
That is, if the drainage is stored only from half of the storage container 3 to a height lower than the radius of the ventilation hole 10a, the drainage will leak from the ventilation hole 10a even if the storage container 3 is tilted and left as it is. There is no. Therefore, it is possible to suppress the drainage contained in the container 3 from flowing into the negative pressure container 2 through the ventilation hole 10a and the connecting tube 6.

In the present embodiment, the ventilation hole 10a is provided in the center of the circular filter 10 and is arranged on the imaginary line L, but the configuration is not limited to this. That is, even if the ventilation hole 10a is provided not at the center of the filter 10 but at the corner of the filter 10, it may be arranged on the imaginary line L.

Further, the filter 10 is formed with a through hole 10b for passing the inner boss 9c provided on the bottle cap 9 and having a diameter which is the same as or slightly larger than the outer diameter of the inner boss 9c. By the inner boss 9c and the through hole 10b through which the inner boss 9c is inserted, the drainage introduced from the liquid collection port 9b is prevented from touching the filter 10 in the normal state (standing state), and the drainage is stored in the housing portion 3e. You will be able to collect it.

<About the components of the filter>
Next, components of the filter 10 will be described mainly with reference to FIG. FIG. 4 is an enlarged cross-sectional view showing a cross section of the filter 10 according to the present embodiment in an enlarged manner.
The filter 10 is a sheet-like filter that includes the non-woven fabric 10c and has a hydrophobic surface at least on the housing portion 3e side.
Specifically, the filter 10 according to the present embodiment includes, as a membrane, an open-cell type resin porous material 10d containing an acrylic copolymer, and a nylon non-woven fabric 10c as a support material. In the filter 10 according to the present embodiment, the porous material 10d is on both sides and the inside of the nonwoven fabric 10c, the layers are not clearly separated, and the filter 10 has no distinction between the front surface and the back surface. Then, it is optional whether the porous material 10d is a member having hydrophobicity and the non-woven fabric 10c has hydrophobicity.

Thus, the filter 10 is provided with the non-woven fabric 10c, and at least the surface on the side of the containing portion 3e has a hydrophobic sheet shape, so that it is possible to ventilate while blocking the passage of liquids and solids, In addition, the shape of the filter 10 can be stabilized by the characteristics of the non-woven fabric 10c as the support material.
Although the filter 10 has been described as having “hydrophobicity”, strictly speaking, it means “having hydrophobicity as a whole surface on the accommodation section 3e side”, and a part other than the surface on the accommodation section 3e side. May have hydrophilicity.

In particular, it is preferable that the porous material 10d of the filter 10 is provided facing (exposed) to the housing portion 3e.
In this way, the filter 10 includes the resin-made open-cell type porous material 10d (for example, a resin membrane) facing the housing portion 3e, so that the porous material 10d allows the air from the housing portion 3e to pass therethrough. While the drainage can be properly captured, it is possible to preferably prevent the drainage stored in the storage portion 3e from going to the negative pressure container 2.
Further, the porous material 10d is impregnated into the gap between the fibers forming the non-woven fabric 10c and is bonded to the non-woven fabric 10c. Since the nonwoven fabric 10c is impregnated with the porous material 10d and the two are bonded together, the bonding force between the porous material 10d and the nonwoven fabric 10c is increased.

As described above, it is preferable that the porous material 10d is provided on the housing portion 3e side, but the configuration is not limited to this. That is, which surface of the filter 10 is attached to the filter attachment portion 9d can be arbitrarily selected.

<< Variations >>
Next, components of the filter 10X according to the modification will be described mainly with reference to FIG. FIG. 5 is an enlarged cross-sectional view showing a cross section of a filter 10X according to a modification in an enlarged manner.
The filter 10X according to the modification includes a porous material 10f made of resin of an open cell type containing polyallylsulfone (PAS) as a membrane, and a nonwoven fabric 10e made of polyester as a support material.

The filter 10X is configured to include a first layer 10g including a nonwoven fabric 10e and a second layer 10h different from the first layer 10g. The first layer 10g is arranged closer to the filter mounting portion 9d than the center of the filter 10X in the thickness direction. More specifically, the first layer 10g is arranged so as to be exposed on the surface of the filter attachment portion 9d side.
As described above, the first layer 10g including the nonwoven fabric 10e is disposed closer to the filter mounting portion 9d side than the center in the thickness direction of the filter 10X. The shape of the filter 10X can be stabilized. In other words, the change in the shape of the first layer 10g in the non-woven fabric 10e can be suppressed, and thus the separation of the filter 10X from the filter mounting portion 9d can be suppressed.
Further, the second layer 10h, which is a region for capturing the drainage more than the first layer 10g and contains a large amount of the porous material 10f, can be widely secured in the thickness direction of the filter 10X.

The filter 10X is not limited to the one in which the second layer 10h does not include the nonwoven fabric 10e at all. That is, even if each of the first layer 10g and the second layer 10h is composed of the porous material 10d and the nonwoven fabric 10e, the ratio of the nonwoven fabric 10e included in the first layer 10g is the second. It may be higher than the ratio of the non-woven fabric 10e included in the layer 10h.

As described above, it is preferable that the first layer 10g is disposed on the filter attachment portion 9d side, but the configuration is not limited to such a configuration. That is, which surface of the filter 10X is attached to the filter attachment portion 9d can be arbitrarily selected.

The above embodiment includes the following technical ideas.
(1) A medical suction device for sucking drainage by negative pressure formed by a negative pressure container,
The negative pressure container,
An exhaust unit connected to the negative pressure container to exhaust air to the outside,
A storage container having a storage portion connected to the negative pressure container to store the drainage,
A medical suction characterized in that a filter that allows the air to pass while blocking the passage of liquids and solids is provided on the path of the air from the inside of the storage container to the inside of the negative pressure container. Instrument.
(2) The storage container includes a container main body having the storage part, and a connection lid having a connection part for covering the opening of the container main body and connecting to the negative pressure container,
The medical suction device according to (1), wherein the filter is disposed on the container body side of the connection lid.
(3) The medical suction device according to (1) or (2), wherein the filter has a vent hole having a diameter larger than the average pore diameter of the filter.
(4) The medical suction according to (3), wherein the ventilation hole of the filter is formed on an imaginary line extending upward through the center of the storage portion in a state where the storage container is erected. Instrument.
(5) The medical suction device according to any one of (1) to (4), wherein the filter is a sheet-shaped filter having a non-woven fabric and having hydrophobicity.
(6) The storage container has a filter mounting portion to which the filter is mounted,
The filter is configured to include a first layer containing the non-woven fabric and a second layer different from the first layer,
The medical suction device according to (5), wherein the first layer is disposed closer to the filter attachment portion than the center of the filter in the thickness direction.
(7) The filter includes an open-cell type resin porous material,
The medical suction device according to (5) or (6), wherein the porous material is provided so as to face the accommodation portion.
(8) The medical suction device according to (7), wherein the porous material is impregnated into the gaps between the fibers forming the nonwoven fabric and is bonded to the nonwoven fabric.

1 Medical Suction Device 2 Negative Pressure Container 2a Cap 3 Storage Container 3b Clamping Member 3d Container Main Body 3e Storage Section 4 Exhaust Member (Exhaust Section)
5 Balloon 6 Connection tube 7 One-way valve on exhaust side 9 Bottle cap (connection lid)
9a Connection boss (connection part)
9b Liquid collection port 9c Inner boss 9d Filter attachment part

9e Return protrusion

10, 10X filter 10a Vent hole 10b Through

hole

10c,

10e Nonwoven fabric

10d, 10f Porous material 10g First layer 10h Second layer L Virtual line

Claims

A medical suction device for sucking drainage by negative pressure formed by a negative pressure container,
The negative pressure container,
An exhaust unit connected to the negative pressure container to exhaust air to the outside,
A storage container having a storage portion connected to the negative pressure container to store the drainage,
A medical suction characterized in that a filter that allows the air to pass while blocking the passage of liquids and solids is provided on the path of the air from the inside of the storage container to the inside of the negative pressure container. Instrument.
The storage container includes a container main body having the storage part, and a connection lid that covers an opening of the container main body and has a connection part for connecting to the negative pressure container,
The medical suction device according to claim 1, wherein the filter is disposed on the container body side of the connection lid.
The medical suction device according to claim 1 or 2, wherein the filter has a vent hole having a diameter larger than an average pore diameter of the filter.
The medical suction device according to claim 3, wherein the ventilation hole of the filter is formed on an imaginary line extending upward through the center of the housing portion in a state where the housing container is erected.
The medical suction device according to any one of claims 1 to 4, wherein the filter is a sheet-shaped filter having a non-woven fabric and having hydrophobicity.
The storage container has a filter mounting portion to which the filter is mounted,
The filter is configured to include a first layer containing the non-woven fabric and a second layer different from the first layer,
The medical suction device according to claim 5, wherein the first layer is disposed closer to the filter attachment portion than the center of the filter in the thickness direction.
The filter includes an open-cell type resin porous material,
The medical suction device according to claim 5, wherein the porous material is provided so as to face the accommodation portion.
The medical suction device according to claim 7, wherein the porous material is impregnated into a gap between fibers constituting the non-woven fabric and is bonded to the non-woven fabric.