VIRUS-COLLECTING FILTER FOR MEDICAL ASPIRATOR SYSTEM

Abstract

Provided is a molded filter used for a flexible disposable bag which is produced so as to be capable of sucking and storing, for example, bodily secretions of a patient and being disposed when a fixed storage amount is reached, wherein a laminate of at least two elements of a powdered hydrophilic swelling agent and a charged nonwoven fabric, and more preferably, a laminate of three elements with a hydrophobic porous film added thereto, is used as a filter base material and the charged nonwoven fabric is arranged downstream of the powdered hydrophilic swelling agent in a direction of flow of expiratory air inside the body. Thus, the molded filter has functions of air permeability that is equal to or higher than a PE sintered body CMC filter, short term and long term waterproof properties, and a better microbial barrier property.

Claims

1. A flexible disposable bag or container for a medical aspirator system, the disposable bag or container including a suction port to connect to a suction catheter to take in exhaled breath and secretions from a patient or a user, the disposable bag or container being configured to retain the secretions out of the exhaled breath and the secretions sucked in through the suction port, configured to be housed, except for the suction port and a portion surrounding the suction port, in a space formed by a rigid container main body and a lid portion thereof, which are other components of the medical aspirator system, and configured to be removed from the rigid container and disposed of after an amount of the secretions retained therein reaches a predetermined retention amount, wherein the disposable bag or container comprises a molded body of an air permeation component having an air release port configured so that air and the exhaled breath inside the disposable bag or container always pass therethrough when released outside the disposable bag or container, the disposable bag or container further comprises a molded body filter which is bonded or connected to the air permeation component in an airtight manner and which prevents the secretions from passing therethrough and allows all the air and the exhaled breath to pass therethrough, a filter base material of the molded body filter is formed of at least two materials which are a solid hydrophilic swelling agent and an electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream of the solid hydrophilic swelling agent in a flow direction of the exhaled breath.

2. The disposable bag or container according to claim 1, wherein the filter base material of the molded body filter is configured such that the filter base material of the molded body filter is formed of at least three materials which are a hydrophobic porous film in addition to the solid hydrophilic swelling agent and the electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream of the solid hydrophilic swelling agent in the flow direction of the exhaled breath.

3. The disposable bag or container according to claim 2, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed by the hydrophobic porous film, and the electrically-charged nonwoven fabric is placed downstream in the flow of the exhaled breath.

4. The disposable bag or container according to claim 3, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed between two of the hydrophobic porous films which are not electrically charged, and the electrically-charged nonwoven fabric is further placed downstream in the flow of the exhaled breath.

5. The disposable bag or container according to claim 2, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed between the hydrophobic porous film and the electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream in the flow of the exhaled breath.

6. The disposable bag or container according to claim 1, wherein the solid hydrophilic swelling agent in the filter base material of the molded body filter is a hydrophilic cellulose-based polymer.

7. The disposable bag or container according to claim 6, wherein the hydrophilic cellulose-based polymer in the filter base material of the molded body filter is sodium carboxymethyl cellulose (CMC).

8. The disposable bag or container according to claim 1, wherein the air permeation component further has the suction port and an attachment shape to be fixed to the rigid container and/or the lid portion, the air release port communicates with an inside of the rigid container in such a manner as to allow gas to pass therethrough, when an inside of the rigid container is evacuated of air with the rigid container being connected to an aspirator main body, the disposable bag or container is also reduced in pressure through the air release port, thereby sucking in the exhaled breath and the secretions through the suction port, and air and the exhaled breath sucked into the disposable bag or container is released to the inside of the rigid container through the air release port until the secretions retained in the disposable bag or container penetrate into the molded body filter and significantly hinder air permeability.

9. The disposable bag or container according to claim 1, wherein the disposable bag or container is configured such that the air release port of the air permeation component is directly connected to an aspirator main body via a suction tube, thereby reducing pressure in the disposable bag or container, and consequently sucking in the exhaled breath and the secretions through the suction port, the secretions are then retained in the disposable bag or container, while remaining air or exhaled breath is released outside the rigid container through the air release port, and in the space formed by the rigid container main body and the lid portion, the molded body filter is attached in contact with an outer side of the air permeation component, attached in contact with an inner side of the rigid container or the lid portion, or attached to some midpoint in the suction tube from the air release port to the rigid container or the lid portion.

10. The disposable bag or container according to claim 1, wherein the molded body filter includes a main body of a three-dimensionally shaped component having an internal cavity, a support portion provided to the three-dimensionally shaped component toward an inside of the disposable bag or container, the support portion being provided to join the filter base material, net-shaped ribs provided to the support portion to prevent the film-shaped filter base material from swelling inward, the filter base material joined to the support portion in an airtight manner, and an outlet provided toward the discharge port of the rigid container.

11. The disposable bag or container according to claim 1, wherein the air permeation component is made of a thermoplastic material including polypropylene (PP) or polyethylene (PE).

12. The disposable bag or container according to claim 10, wherein the three-dimensionally shaped component is shaped like a hollow cylinder or a cuboid.

13. The disposable bag or container according to claim 10, wherein the support portion is a flat plate having a shape including a circle or rectangle, and an opening portion of the support portion is reinforced by the net-shaped ribs.

14. The disposable bag or container according to claim 1, wherein the hydrophobic porous film has a maximum pore size ranging from 0.2 μm to 10 μm.

15. The disposable bag or container according to claim 14, wherein the hydrophobic porous film has a maximum pore size ranging from 1 μm to 5 μm.

16. The disposable bag or container according to claim 1, wherein the molded body filter is additionally connected, in an airtight manner, to some midpoint in a connection hose connecting the rigid container main body and the aspirator main body, the filter base material of the molded body filter is formed of at least two materials which are a solid hydrophilic swelling agent and an electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream of the solid hydrophilic swelling agent in the flow direction of the exhaled breath.

17. The disposable bag or container according to claim 1, wherein the electrically-charged nonwoven fabric is made of a material containing a polypropylene resin (PP) or a nylon 66 resin.

18. The disposable bag or container according to claim 1, wherein a charge amount of the electrically-charged nonwoven fabric is 2.0×10.sup.−10 coulombs/cm.sup.2 or greater in terms of a surface charge density.

19. A molded body filter that prevents passage of bacteria and viruses, the molded body filter being used for a medical aspirator system which includes a suction port to connect to a suction catheter to take in exhaled breath and secretions from a patient or a user, a rigid container main body and a lid portion thereof, a space which is provided in a void formed by the rigid container main body and the lid portion and retains only the secretions out of the exhaled breath and the secretions, and a discharge port provided to the rigid container main body to discharge the air and the exhaled breath other than the secretions retained in the space, the discharge being performed by an aspirator main body outside the rigid container main body, the molded body filter being configured so that the air and the exhaled breath other than the secretions always pass though the molded body filter before being sucked into the aspirator main body, and being placed in an airtight manner at a position downstream of the retention space for the secretions in a flow direction of the air and the exhaled breath, preventing passage of bacteria and viruses which may be contained in the exhaled breath and the secretions, wherein a base material of the molded body filter is formed of at least two materials which are a solid hydrophilic swelling agent and an electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream of the solid hydrophilic swelling agent in the flow direction.

20. The molded body filter that prevents passage of bacteria and viruses according to claim 19, comprising a flexible disposable bag or container as the retention space, the disposable bag or container being housed in the void formed by the rigid container main body and the lid portion, configured to retain only the secretions out of the exhaled breath and the secretions, and configured to be removed from the rigid container and disposed of after an amount of the secretions retained reaches a predetermined retention amount, wherein the disposable bag or container includes a molded body of an air permeation component having at least the suction port and an air release port communicating with the discharge port.

21. The molded body filter that prevents passage of bacteria and viruses according to claim 20, wherein the molded body filter includes a main body of a three-dimensionally shaped component having an internal cavity, a support portion provided to the three-dimensionally shaped component toward an inside of the disposable bag or container, the support portion being provided to join the filter base material, net-shaped ribs provided to the support portion to prevent the film-shaped filter base material from swelling in the flow direction, the filter base material joined onto the ribs in an airtight manner, and the air release port provided toward the discharge port of the rigid container.

22. The molded body filter that prevents passage of bacteria and viruses according to claim 21, wherein the three-dimensionally shaped component is shaped like a hollow cylinder or a cuboid.

23. The molded body filter that prevents passage of bacteria and viruses according to claim 21, wherein the support portion is a flat plate having a shape including a circle or rectangle, and an opening portion of the support portion is reinforced by the net-shaped ribs.

24. The molded body filter that prevents passage of bacteria and viruses according to claim 20, wherein the molded body filter is placed at the air permeation component in an airtight manner toward an inside of the disposable bag or container.

25. The molded body filter that prevents passage of bacteria and viruses according to claim 20, wherein the molded body filter is placed in contact with an outer side of the air permeation component, placed in contact with an inner side of the rigid container or the lid portion, or placed at some midpoint in the suction tube from the air release port to the rigid container or the lid portion.

26. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the molded body filter is removably placed at some midpoint in a connection hose connecting the aspirator main body and an air release portion of the rigid container.

27. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed by the hydrophobic porous film, and the electrically-charged nonwoven fabric is placed downstream in the flow of the exhaled breath.

28. The molded body filter that prevents passage of bacteria and viruses according to claim 25, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed between two of the hydrophobic porous films which are not electrically charged, and the electrically-charged nonwoven fabric is further placed downstream in the flow of the exhaled breath.

29. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the filter base material of the molded body filter is configured such that the solid hydrophilic swelling agent is sandwiched and sealed between the hydrophobic porous film and the electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream in the flow of the exhaled breath.

30. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the solid hydrophilic swelling agent in the filter base material of the molded body filter is a hydrophilic cellulose-based polymer.

31. The molded body filter that prevents passage of bacteria and viruses according to claim 30, wherein the hydrophilic cellulose-based polymer in the filter base material of the molded body filter is sodium carboxymethyl cellulose (CMC).

32. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the hydrophobic porous film has a maximum pore size ranging from 0.2 μm to 10 μm.

33. The molded body filter that prevents passage of bacteria and viruses according to claim 32, wherein the hydrophobic porous film has a maximum pore size ranging from 1 μm to 5 μm.

34. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein the electrically-charged nonwoven fabric is made of a material containing a polypropylene resin (PP) or a nylon 66 resin.

35. The molded body filter that prevents passage of bacteria and viruses according to claim 19, wherein, a charge amount of the electrically-charged nonwoven fabric is 2.0×10.sup.−10 coulombs/cm.sup.2 or greater in terms of a surface charge density.

36. A method of retaining and disposing of secretions using the disposable bag or container according to claim 1, the disposable bag or container retaining the secretions out of the exhaled breath and the secretions from the patient or user which have been sucked in through the suction port and being disposed of after an amount of the secretions retained therein reaches the predetermined retention amount, characterized in that the method comprises: allowing all air and the exhaled breath to pass through the molded body filter, while preventing the secretions from passing through the molded body filter, the molded body filter being configured such that the filter base material is formed of at least two materials which are a solid hydrophilic swelling agent and an electrically-charged nonwoven fabric, and the electrically-charged nonwoven fabric is placed downstream of the solid hydrophilic swelling agent in the flow direction of the exhaled breath, and disposing of the disposable bag or container including the molded body filter.

37. The method of retaining and disposing of secretions according to claim 36, wherein the molded body filter includes the filter base material whose pore size, thickness, area, and charge amount are adjusted so that the molded body filter has an air permeation flow rate of 20 L/min or more under a suction power of 85 kPa and also has bacteria barrier performance, the filter base material being formed of at least two materials which are a solid hydrophilic swelling agent and an electrically-charged nonwoven fabric, the electrically-charged nonwoven fabric being placed downstream of the solid hydrophilic swelling agent in the flow direction of the exhaled breath.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0071] FIG. 1 is a view of the schematic configuration of an existing medical aspirator's basic system.

[0072] FIG. 2A is a perspective view of a three-dimensionally shaped component used for a disposable bag or the like according to the present invention (before a filter base material is joined).

[0073] FIG. 2B is a perspective view of a molded body filter (the three-dimensionally shaped component with the filter base material joined thereto) used for a disposable bag or the like according to the present invention.

[0074] FIG. 2C illustrates an example of a schematic layer configuration of the filter base material which is used for a disposable bag or the like according to the present invention and includes a hydrophobic water-swelling filter, with (A) illustrating an example with three layers and (B) illustrating an example with four layers.

[0075] FIG. 3A is a perspective view of an air permeation component used for a disposable bag or the like according to the present invention.

[0076] FIG. 3B is a perspective view of the air permeation component used for a disposable bag according to the present invention, with the molded body filter attached thereto.

[0077] FIG. 3C is a perspective view of the air permeation component used for a disposable bag or the like according to the present invention, the air permeation component being molded in one piece with the three-dimensionally shaped component.

[0078] FIG. 3D is a perspective view of the air permeation component of FIG. 3C before the filter base material is joined thereto.

[0079] FIG. 3E is a side view of the air permeation component of FIG. 3C after the filter base material is joined thereto.

[0080] FIG. 3F is a perspective view of the air permeation component which is used for a disposable bag or the like according to the present invention, and to which a circular filter base material is to be joined.

[0081] FIG. 3G is an exploded view of a circular three-dimensionally shaped component used for the air permeation component in FIG. 3F, showing a cover, a packing, and ribs from the left.

[0082] FIG. 3H is a perspective view of an air permeation component used for a disposable bag or the like according to the present invention, the air permeation component having a circular molded body filter attached thereto horizontally with respect to the air permeation component (in the width direction of a flexible bag).

[0083] FIG. 3I is a perspective view of the air permeation component used for the disposable bag or the like according to the present invention, the air permeation component having a circular molded body filter attached to an upper portion of the air permeation component (outside of the flexible bag).

[0084] FIG. 4A is a perspective view of a flexible bag used for the disposable bag or the like according to the present invention.

[0085] FIG. 4B is a perspective view of the disposable bag or the like according to the present invention after the air permeation component, the three-dimensionally shaped component, and the flexible bag are all joined together.

[0086] FIG. 5A is a sectional view illustrating a state where the disposable bag or the like according to the present invention is housed in a rigid container.

[0087] FIG. 5B is a perspective view illustrating a state where the lid of the rigid container housing the disposable bag or the like according to the present invention is open.

DESCRIPTION OF EMBODIMENTS

[0088] A disposable bag or the like having, as its integral part, a molded component which is formed using a hydrophobic CMC electrically-charged filter and the like and which has air permeability and waterproof functions can be manufactured to have various shapes, functions, and sizes. Some representative embodiments of the present invention are given below.

Embodiment 1

[0089] FIG. 2A is a three-dimensionally shaped component 200 to the opening portion 21 of which a hydrophobic water-swelling filter 25 is to be thermally fused later. This shape is formed by injection molding using a mold and polypropylene (PP) as a raw material. This three-dimensionally shaped component has the opening portion 21, which serves as an area to which the hydrophobic water-swelling filter 25 or the like is to be thermally fused, grid-shaped ribs 22 to support the hydrophobic water-swelling filter 25 in the opening portion, an internal cavity 23 serving as a flow passage for passing air, and a fitting shape 24 for attachment to a molded body illustrated in FIG. 3A. Note that one side, both sides, four side surfaces, or the four side surfaces and the bottom surface of the substantially cuboid molded component may be formed as an opening portion. Also note that the three-dimensionally shaped component 200 may be in various other shapes than a cuboid, such as a hollow cylinder or a discoid. Table 3 shows the area of the opening in a three-dimensionally shaped component which is circular here as a representative example, along with the area of a filter used and that of a packing used.

[0090] FIG. 2B illustrates a molded component 210 where a filter base material 25 which is formed of a hydrophobic water-swelling filter or a laminate of a hydrophobic water-swelling film, a PP nonwoven fabric, an electrically-charged nonwoven fabric, and/or the like is thermally fused to the above three-dimensionally shaped component. Hereinbelow, the molded component 210 is called a “molded body filter”. The thickness of the hydrophobic water-swelling filter used in this embodiment ranges from 50 μm to 200 μm, and the maximum pore size thereof ranges from 0.2 μm to 5 μm. Note that, if a PTFE nonwoven fabric is used for the support, the thickness including the PET nonwoven fabric is set to 300 μm or smaller (the pore size cannot be defined).

[0091] FIG. 2C illustrates an example of the layer structure of the filter base material. The filter base material is configured with at least two layers: (1) a hydrophilic swelling agent in a solid, or particularly powder, state and (2) an electrically-charged nonwoven fabric, but it is more preferable when the filter base material additionally has (3) a hydrophobic porous film and is thus configured with three layers. As preferable configuration examples, part (A) illustrates a case with three layers, and part (B) illustrates a case with four layers. The hydrophobic porous film has to be placed upstream of the hydrophilic swelling agent in the airflow of exhaled breath in order to prevent waste liquids in the film bag from coming into direct contact with the hydrophilic swelling agent. Also, it is more desirable to place the hydrophobic porous film on both sides of the hydrophilic swelling agent in a sandwiching manner. Further, in order to remove not only liquids but also bacteria and viruses, the electrically-charged nonwoven fabric has to be placed downstream of the hydrophilic swelling agent layer in the airflow. As long as these placement conditions are satisfied, additional layers may be placed as needed.

[0092] FIG. 3A illustrates the outer appearance of an air permeation component 300 which is manufactured by molding and placed in contact with an inner side of the film bag. The air permeation component 300 includes a suction port 31 to which the suction catheter 18 is to be joined, a cap 32 for the suction port 31, an attachment shape 33 to be attached to the rigid container, a fitting portion 34 to be fitted to the fitting shape 24 of the three-dimensionally shaped component 210, an air release port 35, and a joint portion 36 to be joined with a film bag for retaining secretions and the like by thermal fusion bonding or the like. To prevent secretions and the like retained in a film bag or their mist matters flowing backwards in the suction pipe, a backflow check valve 38 is attached to an outlet 37 of the suction port on the film bag side, the valve 38 being manufactured separately using vulcanized rubber.

[0093] FIG. 3B illustrates a complex molded body 310 integrally having a molded body filter 210 in FIG. 2B, in which the hydrophobic water-swelling filter is thermally fused, and the air permeation component in FIG. 3A, the molded body filter 210 being fitted to the air permeation component in an airtight manner. Note that this airtight integration can be achieved not only by fitting, but also by thermal fusion bonding of both parts, of course.

Embodiment 2

[0094] In FIGS. 3A and 3B, the complex molded body 310 is formed by integration of the molded body filter 210 to the air permeation component 300 in an airtight manner by means of fitting as an example. FIG. 3C illustrates an embodiment where the three-dimensionally shaped component 200 and the air permeation component 300 are molded in one piece. Specifically, the ribs 22 and the internal cavity 23 are formed integrally with the air permeation component 300, and as illustrated in FIG. 3D, the filter base material 25 is sandwiched between the ribs 22 and a cover 26 and is fixed in an airtight manner by thermal fusion bonding, adhesion, or fitting (FIG. 3E). When such cover 26 is used, air can be let in and out of the disposable bag through an air permeation port 27 provided to the cover 26. The air permeation port 27 is provided to an upper portion of the cover 26 so that even if the amount of waste liquids in the disposable bag increases, it will take as much time as possible for the waste liquids to come into contact with the hydrophobic water-swelling filter 25. FIG. 3F illustrates a case where the three-dimensionally shaped component 200 is circular. FIG. 3G illustrates an exploded view of the circular three-dimensionally shaped component 200. The hydrophobic water-swelling filter 25 (not shown) is fixed between the ribs 22 and the cover 26. Also, a packing 28 is placed around the hydrophobic water-swelling filter 25 to prevent waste liquids from leaking from the edge of the filter.

[0095] Although the above embodiment illustrates a configuration where the molded body filter 210 is placed vertically, the molded body filter 210 may be attached to a lower portion of the joint portion 36 horizontally as illustrated in FIG. 3H. A film bag 400 is set in such a manner as to house this circular molded body filter, is fused at the joint portion 36, and is thus fixed in an airtight manner. The lower surface of the molded body filter 210 communicates with the inside of the film bag, and the upper surface thereof communicates with the air release port 35.

[0096] FIG. 4A illustrates an example of a film bag for retaining secretions and the like. Various shapes are possible for the film bag, but it is necessary that the final, integrally-formed disposable bag can be efficiently stored in the rigid container illustrated in FIGS. 5A and 5B. Generally, the film bag is formed by multi-layer inflation molding using linear polyethylene (LLDPE), a polyethylene terephthalate (PET) resin, and/or a nylon resin (NY), and additionally an adhesive resin. In the embodiments of the present invention, the film back includes three layers, with an outer layer (PET) being 30 μm thick, an adhesive resin layer being 7 μm thick, and an inner layer (LLDPE) being 120 μm thick. In this embodiment, the internal volume is 1300 cc.

[0097] FIG. 4B illustrates a mode where the complex molded body 310 of FIG. 3B is placed in contact with and thermally fused to the upper, inner edge of the film bag of FIG. 4A in an airtight manner. Thus completed is a final disposable bag 410 for medical aspirators which is formed of the film bag 400 and the integrated complex molded body 310 including the three-dimensionally shaped component 210 which is formed using the hydrophobic water-swelling filter and has air permeability and waterproof functions. This embodiment illustrates an example where the complex molded body 310 is placed in contact with an inner side of the bag, but instead, the complex molded body 310 may be placed in contact with an outer side of the film bag and joined. Additionally, the position at which the complex molded body 310 is attached to the film bag does not have to be the upper edge portion of the film bag 400, but instead, may be at middle positions or higher on the four side surfaces or the corner portions of the side surfaces of the bag.

Embodiment 3

[0098] To use a detour air release system in which the aspirator main body reduces the pressure in the rigid container and thereby reduces the pressure inside the disposable bag or the like through the air permeation component, Embodiments 1 and 2 described above describe a configuration in which the three-dimensionally shaped component to which the hydrophobic water-swelling filter is thermally fused, that is, the molded body filter is placed inside the disposable bag or the like. To be used for a similar detour air release system, a different configuration may be employed in which the molded body filter is attached to the outside of the disposable bag or the like (i.e., to an upper portion of the air permeation component). FIG. 3I illustrates such an embodiment. In the structure of this embodiment, the circular molded body filter 210 is fixed horizontally to the outer side of the air release port 35, and the airflow goes from the lower side (the inside of the disposable bag or the like) to the air release port 13 on the upper side. Alternatively, a configuration may be employed in which the aspirator main body directly sucks and reduces the pressure in the disposable bag or the like. Using the example of FIG. 3I, a structure may be employed in which the molded body filter 210 is attached to the outer side of the air release port 35 of the air permeation component in an airtight manner, and the connection hose directly connected to the aspirator main body is connected to the outlet side of the molded body filter. By the connection hose (not shown), the air release port 13 is connected to the discharge port 15 provided to a side surface of the rigid container 120, and is thus directly connected to the aspirator main body.

Embodiment 4

[0099] As another embodiment, a configuration may be employed in which the molded body filter is provided in contact with the inner side of the discharge port 15 in the rigid container or the lid thereof, and the air release port 35 of the air permeation component 300 is connected to the inlet of the molded body filter with a suction tube, to suck from the suction port 16. Alternatively, the molded body filter may be provided at some midpoint in this suction tube.

Embodiment 5

[0100] Embodiments 1 to 4 described above discuss a filter (primary filter) attached to the disposable bag or container into which secretions are sucked or to the inside of the rigid container. As yet another embodiment, a molded body filter according to the present invention including a laminated filter formed of a hydrophilic water-swelling filter and an electrically-charged nonwoven fabric or of a hydrophobic water-swelling filter and an electrically-charged nonwoven fabric may be used as a secondary filter to be connected downstream of the rigid container. In other words, the molded body filter may be connected to the connection hose 19, which connects the rigid container 120 and the aspirator main body 130 in FIG. 1, in an airtight manner to shield outside air. This allows even higher pathogen barrier performance.

[0101] FIGS. 5A and 5B illustrate a state where a completed disposable bag is attached to a rigid container 500. Note that FIG. 5B illustrates an example where the air permeation component 300 mounted uses the circular complex molded body 310 illustrated in FIG. 3I.

[0102] Although descriptions have been given of the above embodiments, the present invention is not limited to them. It is apparent to those skilled in the art that the present invention can be changed and modified variously within the spirit of the present invention and the scope of claims attached hereto.

REFERENCE SIGNS LIST

[0103] 100 medical aspirator basic system [0104] 11 suction port [0105] 12 filter [0106] 13 air release port [0107] 15 discharge port [0108] 16 suction port [0109] 18 suction catheter [0110] 19 connection hose [0111] 110 disposable bag or the like [0112] 120, 500 rigid container [0113] 122 lid portion of rigid container [0114] 130 aspirator main body [0115] 200 three-dimensionally shaped component [0116] 21 opening portion [0117] 22 ribs [0118] 23 internal cavity [0119] 24 fitting shape [0120] 25 hydrophobic water-swelling filter [0121] 26 cover [0122] 27 air permeation port [0123] 28 packing [0124] 210 molded body filter (three-dimensionally shaped component to which the hydrophobic water-swelling filter is joined) [0125] 300 air permeation component [0126] 31 suction port [0127] 32 cap [0128] 33 attachment shape to be attached to rigid container [0129] 34 fitting portion [0130] 35 air release port [0131] 36 joint portion [0132] 37 outlet of suction port [0133] 38 backflow check valve [0134] 310 integrated complex molded body [0135] 400 film bag [0136] 410 completed disposable bag