JP7293616B2 - medical suction device - Google Patents

Description

The present invention relates to a medical suction device with a filter.

When bodily fluids such as blood and exudate (also called drainage) are sucked and discharged from the wound of the human body through a tube, there is a storage container that stores the drainage, and a storage container that is connected to the storage container and drains the drainage. Background of the Invention Medical suction devices are commonly used that include a negative pressure reservoir that creates a negative pressure for suction.

For example, Patent Literature 1 describes a storage container for storing drainage (described as a drainage container in the same document), a storage container connected to the storage container and a suction regulator to create a negative pressure in the storage container, and a negative pressure inside the storage container. A medical suction instrument (described as a drainage suction device in the same document) provided with a negative pressure container (described as a water seal in the same document) that enables confirmation of the state is disclosed.
The negative pressure container described in the document is connected to a container through a pipe. The negative pressure container contains water for immersing the tip of the pipe, and the air inside the container is sucked through the pipe by the negative pressure generated inside by the suction regulator. A predetermined negative pressure corresponding to the patient's body cavity pressure is generated in the receiving container by this suction. The suction force generated in the storage container is monitored as the generation of air bubbles released from the tip of the pipe into the sealing liquid (water) in the negative pressure container.

JP-A-10-295803

In the above-described medical suction device, the infiltration of the waste liquid from the holding container to the negative pressure container through the pipe is allowed without being prevented. For this reason, for example, when the storage container is accidentally knocked over, it is assumed that the waste liquid from the storage container will flow into the negative pressure container through the pipe, and there is room for improvement in improving the cleanliness of the negative pressure container.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a medical suction instrument capable of keeping the inside of a negative pressure container cleaner.

A medical suction device according to the present invention is a medical suction device for suctioning a waste liquid by a negative pressure formed in a negative pressure container, comprising: the negative pressure container; An exhaust unit for exhausting air, a storage container connected to the negative pressure container and having a storage unit for storing the waste liquid, and an air path from the inside of the storage container to the inside of the negative pressure container. and a filter that allows the air to pass through while blocking the passage of liquids and solids, and the container includes a container body having the storage portion and a connection lid that covers an opening of the container body. The connection lid further includes a connection portion for connecting to the negative pressure container, a liquid collection port for introducing the waste liquid into the storage portion, and a side of the storage portion that faces the storage portion. an inner boss that protrudes and is connected to the liquid collecting port, the filter is disposed on the connection lid on the accommodating portion side, a through hole for passing the inner boss, and the and a ventilation hole having a larger diameter than the diameter of the pores of the porous material forming the filter, which is provided separately from the through hole .

The medical suction instrument of the present invention makes it possible to keep the inside of the negative pressure container cleaner.

1 is a perspective view showing a medical suction instrument according to this embodiment; FIG. 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 the cross section of the filter which concerns on this embodiment. It is an expanded sectional view which expands and shows the cross section of the filter which concerns on a modification.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a medical suction instrument of the present invention will be described below with reference to the drawings.
The embodiments described below are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the shape, size, arrangement, etc. of the members described below can be changed and improved without departing from the scope of the present invention, and the present invention naturally includes equivalents thereof.
Moreover, in all the drawings, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. In the following description, "vertical direction" refers to the vertical direction when the medical suction instrument 1 is erected as shown in FIG.

<Overview>
First, an overview of a medical suction instrument 1 according to this embodiment will be described mainly with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a medical suction instrument 1 according to this embodiment, and FIG. 2 is a bottom view of a bottle cap 9. As shown in FIG.
A medical suction instrument 1 according to the present embodiment suctions waste liquid by means of a negative pressure formed in a negative pressure container 2 . The medical suction instrument 1 includes a negative pressure container 2, an exhaust portion (exhaust member 4) connected to the negative pressure container 2 for discharging air to the outside, and a container connected to the negative pressure container 2 for containing the waste liquid. a container 3 having a portion 3e.
A filter 10 is provided on the air path from the inside of the storage container 3 to the inside of the negative pressure container 2 to allow air to pass through while blocking the passage of liquids and solids.

Since the filter 10 is provided on the air path from the inside of the container 3 to the inside of the negative pressure container 2, the normal use state (upright state) may be changed if the container 3 is accidentally knocked over. It is possible to prevent the waste liquid contained in the container 3 from moving to the negative pressure container 2 even when the container 3 is in a different state (falling state).
By suppressing the movement of the waste liquid from the storage container 3 to the negative pressure container 2 in this way, for example, when the balloon 5 is provided in the negative pressure container 2, the balloon 5 comes into contact with the waste liquid and deteriorates. can be prevented, and the negative pressure container 2 can be kept clean. In addition, it is possible to prevent the discharged liquid from further leaking (ejecting) to the outside through the negative pressure container 2 .

<Configuration of each part>
Next, mainly referring to FIG. 3 in addition to FIGS. 1 and 2, the configuration of each part of the medical suction instrument 1 will be described. FIG. 3 is a diagram showing a cross section around the bottle cap 9, and is a diagram showing the III-III cross section in FIG.
The negative pressure container 2 has a balloon 5 for checking 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 be communicated with the outside and the air can be released. Further, the balloon 5 is arranged inside the negative pressure container 2 by means of the cap 2a.
The insides of the negative pressure container 2 and the storage container 3 are connected by a connecting tube 6 .

The storage container 3 includes a container body 3d having a storage portion 3e, and a connection lid ( a bottle cap 9);
The bottle cap 9, as shown in FIG. 1, has a liquid collecting port 9b protruding upward. The storage container 3 is configured such that a tube (not shown) is connected to the liquid collection port 9b so that the drainage liquid can be stored in the storage container 3 . A clamping member 3b is attached to the liquid collecting port 9b, and by closing the channel connected to the liquid collecting port 9b with the clamping member 3b, it is possible to stop the inflow of the waste liquid from the human body into the container 3. configured as possible.

A filter attachment portion 9d to which the filter 10 is attached is provided in the storage container 3 (on the container body 3d side of the bottle cap 9). The filter mounting portion 9d has a stepped portion to which the peripheral edge of the disk-shaped filter 10 is adhered (or welded), is formed in a circular shape in a bottom view, and is formed to protrude downward from the surroundings. there is

As shown in FIG. 3, a return projection 9e is formed around the connecting boss 9a on the surface of the bottle cap 9 on the side of the housing portion 3e so as to protrude toward the housing portion 3e (filter 10 side). The return projection 9e is for suppressing the flow into the connecting tube 6 when the container 3 is laid down and the waste liquid flows into the connecting tube 6 side rather than the filter 10 through the later-described vent hole 10a. be. The return projection 9e is formed to have a circular cross-section (annular shape), and protrudes toward the accommodation portion 3e from the periphery of the through-hole passing through the connection boss 9a.
The return projection 9e can suppress passage of the waste liquid flowing from the vent hole 10a to the connecting tube 6 while allowing air to pass between the connection boss 9a and the vent hole 10a.
A cylindrical inner boss 9c connected to the liquid collection port 9b is formed on the surface of the bottle cap 9 on the side of the accommodating portion 3e so as to protrude toward the accommodating portion 3e (downward).

The exhaust member 4 is for exhausting the air inside the medical suction device 1 (negative pressure container 2) to the outside to bring 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 between 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 arranged on the bottle cap 9 on the side of the container body 3d.
Since the filter 10 is attached to the bottle cap 9, the filter 10 can be easily arranged in the container 3 by attaching the bottle cap 9 to the container main body 3d. The filter 10 arranged in the container 3 is arranged so as to separate the internal space of the container 3 from the internal space of the connecting tube 6 that communicates the negative pressure container 2 and the container 3. .

Note that 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, so that the connecting tube 6 is divided, and a joint (not shown) is provided between the divided members to connect them. It may be provided inside.
Furthermore, if the bottle cap 9 is not provided, the filter may be attached to the container body 3d, and inside the negative pressure container 2, the connection tube 6 and the negative pressure You may make it arrange|position in the position separated from the internal space of the container 2. FIG.

The filter 10 is formed with air holes 10 a having a diameter larger than the average pore diameter of the filter 10 . The "average pore size of the filter 10" is specifically the average pore size of a large number of holes provided in the porous material 10d described later. A value calculated by measuring by mercury intrusion method using a cut test piece.
The filter 10 does not necessarily need to be formed with the air holes 10a. However, since the vent hole 10a is formed in the filter 10, when part of the filter 10 is clogged with the drained liquid, it becomes easy to avoid the complete loss of the ventilating ability. It will be easier to continue to

The air hole 10a of the filter 10 is formed on an imaginary line L extending upward through the center of the accommodating portion 3e when the accommodating container 3 shown in FIG. 1 is in an upright state.
The "state in which the storage container 3 stands up" includes, in addition to the state in which the storage container 3 stands up by itself, for example, a part of the storage container 3 is hung on a part of the shelf next to the bed, and the bottom surface is in a floating state. and standing upright.
In this way, since the vent hole 10a is formed on the imaginary line L extending upward through the center of the storage portion 3e of the storage container 3, when the storage container 3 is tilted in any direction, However, it is possible to make it difficult for the drainage to reach the air vent 10a.
In other words, if the waste liquid is contained only at a height lower than the radius of the vent hole 10a from the half of the container 3, the waste liquid will leak out from the vent hole 10a even if the container 3 is laid down and left as it is. There is no Therefore, it is possible to prevent the waste liquid contained in the container 3 from flowing into the negative pressure container 2 through the connecting tube 6 through the ventilation hole 10a.

In this embodiment, the ventilation hole 10a is provided in the center of the circular filter 10 and is arranged on the virtual line L, but the configuration is not limited to this. That is, even if the air vent 10a is provided in the corner of the filter 10 instead of in the center of the filter 10, it is sufficient if it is arranged on the imaginary line L.

Further, the filter 10 is formed with a through hole 10b having a diameter equal to or slightly larger than the outer diameter of the inner boss 9c for passing the inner boss 9c provided on the bottle cap 9 described above. The inner boss 9c and the through hole 10b passing through the inner boss 9c prevent the waste liquid introduced from the liquid collection port 9b from touching the filter 10 in the normal state (upright state), thereby allowing the waste liquid to flow into the housing portion 3e. It will be recoverable.

<Constituent materials of the filter>
Next, constituent materials of the filter 10 will be described mainly with reference to FIG. FIG. 4 is an enlarged sectional view showing an enlarged section of the filter 10 according to this embodiment.
The filter 10 is a sheet-like filter including a nonwoven fabric 10c and having a hydrophobic surface at least on the side of the accommodating portion 3e.
Specifically, the filter 10 according to the present embodiment includes an open-cell resin porous material 10d containing an acrylic copolymer as a membrane, and a nylon nonwoven fabric 10c as a support material. The filter 10 according to the present embodiment has the porous material 10d on both sides and inside of the nonwoven fabric 10c, and the layers are not clearly divided, and the filter 10 does not distinguish between the front surface and the back surface. It is optional whether the porous material 10d is a hydrophobic member and the nonwoven fabric 10c is hydrophobic.

In this way, the filter 10 is provided with the nonwoven fabric 10c, and at least the surface on the side of the storage part 3e is a sheet-like one having a hydrophobic property. Moreover, the shape of the filter 10 can be stabilized by the characteristics of the nonwoven fabric 10c as the support material.
Although the filter 10 has been described as having "hydrophobicity", strictly speaking, it means "having hydrophobicity as the entire surface on the side of the housing portion 3e", and a part of the surface other than the surface on the side of the housing portion 3e may contain those having hydrophilicity.

In particular, it is preferable that the porous material 10d of the filter 10 is provided so as to face (expose) the accommodating portion 3e.
In this manner, the filter 10 includes the open-cell resin porous material 10d (for example, a resin membrane) facing the housing portion 3e. It is possible to suitably prevent the waste liquid stored in the storage part 3 e from going to the negative pressure container 2 by suitably capturing the waste liquid while keeping the same.
In addition, the porous material 10d impregnates the gaps between the fibers forming the nonwoven fabric 10c and bonds to the nonwoven fabric 10c. Since the porous material 10d is impregnated with the nonwoven fabric 10c and the two are bonded together, the bonding strength between the porous material 10d and the nonwoven fabric 10c is enhanced.

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 side of the filter 10 is attached to the filter attachment portion 9d can be arbitrarily selected.

<<Modification>>
Next, constituent materials of the filter 10X according to the modified example will be described mainly with reference to FIG. FIG. 5 is an enlarged cross-sectional view showing an enlarged cross-section of a filter 10X according to a modification.
A filter 10X according to a modification includes an open-cell resin porous material 10f containing polyarylsulfone (PAS) as a membrane, and a polyester nonwoven fabric 10e as a support material.

The filter 10X includes 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 attachment portion 9d than the center in the thickness direction of the filter 10X. More specifically, the first layer 10g is arranged so as to be exposed on the surface on the side of the filter attachment portion 9d.
In this way, the first layer 10g including the nonwoven fabric 10e is arranged closer to the filter attachment portion 9d than the center in the thickness direction of the filter 10X, so that the filter attachment portion 9d side is provided by the first layer 10g. The shape of the filter 10X can be stabilized. In other words, it is possible to suppress the change in the shape of the nonwoven fabric 10e portion of the first layer 10g, thereby suppressing the separation of the filter 10X from the filter attachment portion 9d.
Furthermore, the second layer 10h, which is a region that captures more waste liquid than the first layer 10g and contains a large amount of the porous material 10f, can be secured widely in the thickness direction of the filter 10X.

In addition, the second layer 10h is not limited to the one in which the nonwoven fabric 10e is not included 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 contained in the first layer 10g is the second layer. It should be higher than the ratio of the nonwoven fabric 10e contained in the layer 10h.

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

The above embodiments include the following technical ideas.
(1) A medical suction device that suctions waste fluid by negative pressure formed in a negative pressure container,
the negative pressure container;
an exhaust unit that is connected to the negative pressure container and exhausts air to the outside;
a storage container connected to the negative pressure container and having a storage portion that stores the drainage;
Medical suction, characterized in that a filter that allows the air to pass through while preventing 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 body having the storage portion, and a connection lid having a connection portion for covering an opening of the container body and connecting to the negative pressure container,
The medical suction instrument according to (1), wherein the filter is arranged on the container body side of the connecting lid.
(3) The medical suction device according to (1) or (2), wherein the filter is formed with vent holes having a diameter larger than the average pore diameter of the filter.
(4) 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 container when the container is upright. instrument.
(5) The medical suction instrument according to any one of (1) to (4), wherein the filter is a hydrophobic sheet-like filter comprising a non-woven fabric.
(6) the container has a filter mounting portion to which the filter is mounted;
The filter includes a first layer containing the nonwoven fabric and a second layer different from the first layer,
The medical suction device according to (5), wherein the first layer is arranged closer to the filter mounting portion than the center in the thickness direction of the filter.
(7) the filter includes an open-cell resin porous material;
The medical suction instrument according to (5) or (6), wherein the porous material is provided facing the accommodating portion.
(8) The medical suction device according to (7), wherein the porous material is bonded to the nonwoven fabric by impregnating the interstices of fibers constituting the nonwoven fabric.

1 Medical Suction Instrument 2 Negative Pressure Container 2a Cap 3 Storage Container 3b Clamp Member 3d Container Main Body 3e Storage Part 4 Exhaust Member (Exhaust Part)
5 balloon 6 connecting tube 7 exhaust part side one-way valve 9 bottle cap (connection cover)
9a Connection boss (connection part)
9b Liquid collection port 9c Inner boss 9d Filter mounting part 9e Return projection 10, 10X Filter 10a Air vent 10b Through hole 10c, 10e Nonwoven fabric 10d, 10f Porous material 10g First layer 10h Second layer L Virtual line

Claims (7)

A medical suction device for suctioning waste fluid by negative pressure formed in a negative pressure container,
the negative pressure container;
an exhaust unit that is connected to the negative pressure container and exhausts air to the outside;
a container having a container connected to the negative pressure container and containing the waste liquid;
a filter provided on the path of the air from the inside of the storage container to the inside of the negative pressure container and allowing the air to pass through while preventing the passage of liquids and solids;
with
The storage container further includes a container body having the storage portion and a connection lid covering an opening of the container body,
The connection cover includes a connecting portion for connecting to the negative pressure vessel, a liquid collecting port for introducing the discharged liquid into the accommodating portion, and a portion protruding toward the accommodating portion, which is the side facing the accommodating portion. an inner boss communicating with the liquid collection port;
The filter is disposed on the housing portion side of the connection lid, and includes a through hole for passing the inner boss, and a hole of a porous material constituting the filter provided separately from the through hole. a vent hole with a diameter greater than the diameter of
A medical suction instrument characterized by: 2. The medical suction device according to claim 1, wherein the air hole of the filter is formed on an imaginary line extending upward through the center of the container when the container is upright. The connection portion is provided at a position radially out of the center of the top surface of the connection lid,
The medical suction instrument according to claim 2. The connection lid further has a return projection protruding around the connection portion on the surface of the connection lid on the side of the accommodation portion,
The medical suction instrument according to claim 3. A filter attachment portion to which the filter is attached is provided on a side of the connection lid facing the accommodation portion, and
The filter includes a first layer containing a nonwoven fabric and a second layer different from the first layer, and is configured in a sheet shape,
The first layer is disposed on the side of the filter opposite to the side facing the accommodating portion from the center in the thickness direction of the filter,
A medical suction instrument according to any one of claims 1 to 4 . The filter includes an open-cell resin porous material,
The porous material is provided facing the storage unit,
A medical suction instrument according to any one of claims 1 to 5. the filter comprises the porous material and a non-woven fabric,
7. The medical suction device according to claim 6, wherein the porous material is bonded to the nonwoven fabric by impregnating the interstices of the fibers forming the nonwoven fabric.

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