US20120124943A1 - Packaging bag for medical supplies, packaging bag containing medical supplies, and method for packaging medical supplies - Google Patents
Packaging bag for medical supplies, packaging bag containing medical supplies, and method for packaging medical supplies Download PDFInfo
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- US20120124943A1 US20120124943A1 US13/388,259 US201013388259A US2012124943A1 US 20120124943 A1 US20120124943 A1 US 20120124943A1 US 201013388259 A US201013388259 A US 201013388259A US 2012124943 A1 US2012124943 A1 US 2012124943A1
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- Prior art keywords
- packaging bag
- medical supplies
- packaging
- film
- gas
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/02—Sterilising, e.g. of complete packages
- B65B55/12—Sterilising contents prior to, or during, packaging
- B65B55/18—Sterilising contents prior to, or during, packaging by liquids or gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B7/00—Closing containers or receptacles after filling
- B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
- A61B2050/314—Flexible bags or pouches
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
- A61B2050/314—Flexible bags or pouches
- A61B2050/316—Flexible bags or pouches double- or multiple-walled
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/206—Ethylene oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/18—Aseptic storing means
- A61L2202/181—Flexible packaging means, e.g. permeable membranes, paper
Definitions
- the present invention relates to a packaging bag. More specifically, it relates to a packaging bag containing various medical supplies such as suture needles, suture thread, and a packaging method.
- the medical supplies such as surgical suture thread and suture needles are contained in a packaging bag after production, and are sterilized and then stored. When using, the packaging bag is opened and the medical supplies are taken out and then used.
- the medical supplies are manufactured and contained in a packaging bag until use, which is not a constant period but storage is often a long time as well. Therefore, the sterilized state needs to be maintained throughout the storage period.
- a bacteria impermeable film is used for the packaging bag for this purpose.
- disinfection is conducted using sodium hypochlorite, hydrogen peroxide, and the like in hospitals, and these disinfectants may penetrate into the packaging bag. Since the packaging bag uses a bacteria impermeable film, introduction of a disinfectant is not required. Rather, it is preferable that the disinfectants do not penetrate into the packaging bag. This is because since these disinfectants have a bleaching action and the medical supplies are colored for identification, the colored medical supplies would be bleached.
- FIG. 3 illustrates the packaging bag for medical supplies disclosed in Patent Document 1, where FIG. 3( a ) is a top view, FIG. 3( b ) is a cross section of FIG. 3( a ), and FIG. 3( c ) is a top view illustrating a state without unnecessary parts.
- medical supplies 1 are contained in an inner bag 2
- the inner bag 2 is contained in an outer bag 6 , thereby constituting a double bag structure.
- Patent Document 1 The medical supplies 1 in Patent Document 1 include surgical suture thread, staples, sponges, pins, prosthetic skin, or the like, and are hydrolyzable or able to enter the body and breakdown by moisture.
- the inner bag 2 uses a heat-sealable plastic film 3 , which is gas and bacteria impermeable, and a film 4 , which is gas permeable and bacteria impermeable.
- the periphery of the films 3 and 4 is heat sealed except for an opening thereof, thereby forming a seal part 5 a .
- the medical supplies 1 are contained in such an inner bag 2 , the opening is heat sealed to form a seal part 5 b , and then sealed.
- the outer bag 6 is consisted of a film resulting from coating metal foil such as aluminum with heat-sealing resin, or laminating a resin film on metal foil such as aluminum.
- One of openings of the outer bag 6 is provided with a gas permeable and bacteria impermeable film 7 .
- the periphery of the outer bag 6 is heat sealed except for an opening thereof, thereby forming a seal part 8 a .
- the inner bag 2 is placed in the outer bag 6 and the opening is heat sealed to form a seal part 8 b .
- FIGS. 3( a ) and 3 ( b ) illustrate this state.
- the sterilization method of the medical supplies 1 is as follows.
- a sterilizing gas such as ethylene oxide gas (EO gas) or the like is supplied to the entire outer bag 6 .
- the sterilizing gas enters into the outer bag 6 via the film 7 , sterilizing the inner surface of the outer bag 6 and the outer surface of the inner bag 2 .
- the sterilizing gas also enters into the inner bag 2 via the gas permeable film 4 , sterilizing the stored medical supplies and the inner surface of the inner bag 2 .
- the double bag is placed in a vacuum device, degasification is performed, the sterilizing gas is discharged, and it is dried by a drying furnace, thereby removing the sterilizing gas and moisture from the outer bag 6 and the inner bag 2 .
- Heat sealing is conducted at a position slightly deviant from the film 7 of the outer bag 6 , and as shown in FIG. 3( c ), a seal part 8 c is formed and the film 7 portion is cut off, thereby completing the process.
- the packaging bag shown in FIG. 3 is made of a film of metal foil such as aluminum laminated on both front and back surfaces of the outer bag 6 , the inside cannot be seen. Therefore, what the stored medical supplies are cannot be visually confirmed.
- both the inner bag 2 and the outer bag 6 need only to be transparent synthetic resin films in order to be able to see inside, normally, such a film transmits not only O 2 , but sodium hypochlorite (NaCiO) and hydrogen peroxide (H 2 O 2 ) for sterilization as well.
- NaCiO sodium hypochlorite
- H 2 O 2 hydrogen peroxide
- suture thread In the case where the medical supplies 1 is suture thread, colored suture thread is normally used in order to display type, thickness, and the like of the suture thread.
- NaClO and H 2 O 2 have disinfecting power and bleaching power, and when they penetrate into the inner bag, the color of the suture thread is bleached, whereby making the type of the suture thread indiscernible.
- the suture thread is weakened by the bleaching chemical action.
- the present invention in light of the current condition, aims to provide a packaging bag, which allows visual confirmation of the content yet does not bleach medical supplies contained therein, a packaging bag containing medical supplies, and a packaging method for medical supplies.
- a packaging bag is characterized in that it includes two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O 2 , wherein a material that is gas permeable and bacteria impermeable is extended on the opening side of at least one of the films, and the periphery of the front and back films except for the opening is sealed.
- the transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O 2 may be a plastic film coated with silica or alumina.
- a packaging bag containing medical supplies according to the present invention is characterized in that it includes two overlapped front and back films sealed at the periphery so as to keep medical supplies within, wherein the front and back films are both bacterial impermeable and do not transmit molecules as large as or greater than O 2 , and at least one of the front and back films is transparent.
- the peripheral seal is not only when sealing the entire periphery, but also includes the case of sealing and leaving a part unsealed.
- it may have a double bag structure, keeping the packaging bag containing medical supplies in a larger packaging bag with the same structure but not containing any medical supplies.
- a transparent film for the same sides of the inner and outer bags allows visual confirmation of content from the outside.
- a packaging method for medical supplies according to the present invention is characterized in that it includes the steps of overlapping two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O 2 , extending a material that is gas permeable and bacteria impermeable on an opening side of at least one of the films, containing the medical supplies in a packaging bag which is formed by sealing the periphery of the front and back films except for the opening, and sealing the opening; sterilizing the packaging bag with sterilizing gas, either removing the gas after sterilization by vacuum or exchanging the gas with another gas (including air), and drying by dry heat or air drying; and sealing the packaging bag so that material portions of the packaging bag that is gas permeable and bacteria impermeable does not communicate with the inside of a stored bag.
- a film resulting from depositing silica or alumina on a transparent plastic film attains properties of maintaining transparency and not transmitting molecules as large as or greater than O 2 .
- Such a film is laminated together and sealed through heat sealing at the periphery except for an opening, into a bag shape. Medical supplies are contained in this bag, it is sterilized using a gas such as EOG, and then sealed. Formation of a material portion that is gas permeable and bacteria impermeable on the opening side of the bag allows sterilization using EOG or the like.
- the H 2 O 2 or sodium hypochlorite even if the packaging bag is exposed to H 2 O 2 or sodium hypochlorite for disinfection after medical supplies are sealed therein, the H 2 O 2 or sodium hypochlorite will not enter the packaging bag and may thereby prevent bleaching of the medical supplies. Moreover, since the films are transparent, content may be confirmed from the outside, which is an excellent result.
- FIG. 1 illustrates a working example of the present invention, where FIG. 1( a ) is a top view of a packaging bag for medical supplies according to the present invention, FIG. 1( b ) is a central cross section of FIG. 1( a ), and FIG. 1( c ) is a top view of a state where medical supplies are contained in the packaging bag for medical supplies according to the present invention and sealed therein;
- FIG. 2 illustrates a working example of the present invention
- FIG. 3 illustrates a conventional packaging bag for medical supplies, where FIG. 3( a ) is a top view, FIG. 3( b ) is a cross section of FIG. 3( a ), and FIG. 3( c ) is a top view illustrating a state without unnecessary parts.
- FIG. 1 illustrates a working example of the present invention, where FIG. 1( a ) is a top view of a packaging bag for medical supplies according to the present invention, FIG. 1( b ) is a central cross section of FIG. 1( a ), and FIG. 1( c ) is a top view of a state where medical supplies are contained in the packaging bag for medical supplies according to the present invention and sealed therein.
- various synthetic resin films such as PET, polypropylene, and nylon are gas permeable, and have a property of transmitting O 2 , of course, as well as hydrogen peroxide, sodium hypochlorite, and the like.
- the inventors of the present invention have found that deposition of silica and alumina on various synthetic resin films such as PET, polypropylene, and nylon allows achievement of a characteristic of not transmitting hydrogen peroxide and sodium hypochlorite while transmitting oxygen marginally, whereby this knowledge has lead to the completion of the present invention.
- Deposition methods for silica and alumina utilize PVD and CVD.
- the film on which silica and alumina are deposited allows transmission can be thought to depend on the magnitude of the molecular weight thereof.
- the molecular weight of oxygen is 32
- the molecular weight of hydrogen peroxide is 34
- the molecular weight of sodium hypochlorite is 74
- the film transmits those with smaller molecular weights than 32, where hydrogen peroxide and sodium hypochlorite with molecular weights greater than 32 are not transmitted as they are greater than the molecular weight of oxygen.
- a packaging bag 10 for medical supplies has a front side film 11 and a backside film 12 .
- Both the front side film 11 and the backside film 12 are various synthetic resin films such as polypropylene or nylon on which silica and alumina are deposited, maintaining a transparent state.
- the front side film 11 and the backside film 12 are both transparent and utilize the same material, but are not limited thereto.
- a transparent film on which silica or alumina is deposited should be used on at least one side.
- either the front side film 11 or the backside film 12 may be a film made by laminating or coating a heat-sealing resin on metal foil such as aluminum.
- a film 13 made of a gas permeable, bacteria impermeable material is extended along an opening side (upper end in the drawing) of the front side film 11 .
- These films 11 to 13 are heat sealable, and left, right, and lower portions are heat sealed so as to form a seal part 16 a , thereby forming a bag shape.
- one sheet may be folded over at the central portion and sealed on two sides so as to form a bag shape.
- the medical supplies 15 are contained in this packaging bag 10 , and the upper opening in the drawing is heat sealed to form a seal part 16 b . When the seal part 16 b is formed by folding one sheet, three sides are sealed.
- the medical supplies 15 are not particularly limited as long as they are for medical use.
- the medical supplies 15 are contained in a packaging bag in the above description, and sterilization processing will be executed next.
- the sterilization processing is as follows.
- a sterilizing gas such as EO gas (ethylene oxide gas) or the like is supplied to the entire packaging bag 10 .
- the sterilizing gas enters into the packaging bag 10 via the film 13 , which is at the opening rim of the packaging bag 10 , sterilizing the inner and outer surfaces of the packaging bag 10 and the contained medical supplies 15 .
- the packaging bag 10 is placed in a vacuum device, degasification is performed, the sterilizing gas is discharged, and it is dried by a drying furnace, thereby removing the sterilizing gas from the packaging bag 10 .
- the sterilizing gas removal method aside from the above method, may also be a method of exchanging it with another gas such as air, or a method of adding dry heat so as to dry it. Dry-heat sterilization is a sterilization method of thermal denaturalization and devitalization of microorganisms, enzymes, and proteins by heating at 160 to 200 degrees Celcius for 30 minutes to 2 hours.
- the films 11 and 12 are heat sealed at a position where the film 13 of the packaging bag 10 does not communicate with the inside of the packaging bag 10 , thereby forming a seal part 16 c as shown in FIG. 1( c ), and the film 13 portion is then cut off, completing the process. If the seal portion 16 c is formed, cutting off the film 13 portion may be omitted.
- the packaging bag in this state is stored at a hospital or the like, even if disinfection is carried out at the hospital using hydrogen peroxide and sodium hypochlorite, hydrogen peroxide and sodium hypochlorite no longer enters the packaging bag 10 , thereby allowing prevention of trouble such as suture thread being decolorized.
- FIG. 2 is a working example where the packaging bag 10 containing the medical supplies 15 shown in FIG. 1 is contained in a larger, outer packaging bag 10 ′ having the same constitution as the packaging bag 10 .
- the packaging bag 10 ′ has the same structure as the packaging bag 10 .
- An opening of the outer packaging bag 10 ′ containing the inner packaging bag 10 is heat sealed so as to form the seal part 16 b , sterilization processing is executed in the same manner as for the packaging bag 10 , and the seal part 16 c is formed, thereby allowing the same double bag structure as in Patent Document 1.
- the films 11 and 12 result from silica and alumina deposited on transparent plastic films, transparency is assured, allowing easy confirmation of the medical supplies contained therein.
- the film on the same side as the packaging bag 10 and the packaging bag 10 ′ be transparent in the case where one of the films 11 and 12 is a laminated film of metal foil such as aluminum or the like, the content may be visually confirmed even if it is a double bag structure.
- packaging bag 10 and the packaging bag 10 ′ have the same structure, this same structure referred to here means functionally the same structure, and the packaging bag 10 and the packaging bag 10 ′ are not limited to being made of the same material.
- the packaging bag 10 of the present invention produces improvements, such that contents may be visually confirmed if the films are PET coated with silica, chlorine gas is not generated even if it is burned after disposal, there is hardly any residue after burning, and it may be lighter than a film using aluminum foil.
- a transparent film that does not transmit any oxygen may be manufactured depending on type of plastic, deposition method of silica and alumina, and the like. If a film that does not transmit oxygen is used, the bag may be used for packaging hydrolyzable medical supplies.
- Table 1 shows results from an experiment using four types of packaging bags A, B, C, and D.
- thickness ( ⁇ m) is thicknesses of the films 11 and 12 constituting the packaging bag 10 for medical supplies, where 50+80 denotes that thickness of the film 11 is 50 micrometers and that of the other film 12 is 80 micrometers. Both of these films have used a film on which silica is deposited on each side.
- Oxygen transmittance (unit is cm 3 /m 2 ⁇ day ⁇ atm) is transmission between inside and outside the packaging bag 10 . Oxygen transmittance of both the film 11 and the film 12 is in a combined state.
- Change in color means that whether or not decolorization has occurred has been visually determined from change in color of the suture thread stored in the packaging bag 10 .
- the packaging bags 10 of the types A, B, C, and D contain the same suture thread, and each of the packaging bags 10 was kept in a state exposed to hydrogen peroxide in a plastic container. Tensile strength and decolorization were determined after seven days and fourteen days.
- a control had been prepared for comparative purposes and had the suture thread contained in the packaging bags 10 of the types A, B, C, and D, but was not exposed to hydrogen peroxide.
- Validity is investigated through comparison with the control, which has ideal quality having sufficient tensile strength without any change in color, as a reference for the experiment results.
- a and B exhibited no decolorization, which is the same result as with the control, C had slight decolorization, and D had greater decolorization.
- Tensile strengths for A to D were 44.7 gf, 44.2 gf, 39.5 gf, and 33.8 gf, respectively, A and B had 100% tensile strength against the control, and C and D had 90% and 77%, respectively.
- silica-coated films have been used in the above working examples, the case of alumina coating may also be treated the same as the silica-coated film by setting the upper limit of oxygen transmittance to approximately 0.11.
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- General Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Apparatus For Disinfection Or Sterilisation (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
There are provided a packaging bag, which allows visual confirmation of the content yet does not bleach medical supplies contained therein, a packaging bag containing medical supplies, and a packaging method for medical supplies.
A packaging bag 10 of the present invention includes two front and back films 11 and 12, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O2, wherein a material 13 that is gas permeable and bacteria impermeable is extended on the opening side of at least one of the films, and the periphery of the front and back films except for the opening is sealed. Medical supplies 15 are contained in the packaging bag 10, the opening is sealed to form a seal part 16 b, and sterilization processing using EO gas or the like is executed. The EO gas is then removed and it is sealed by a seal part 16 c. Even if the medical supplies 15 are exposed to an antiseptic solution such as H2O2, it will not enter the packaging bag 10.
Description
- The present invention relates to a packaging bag. More specifically, it relates to a packaging bag containing various medical supplies such as suture needles, suture thread, and a packaging method.
- The medical supplies such as surgical suture thread and suture needles are contained in a packaging bag after production, and are sterilized and then stored. When using, the packaging bag is opened and the medical supplies are taken out and then used.
- The medical supplies are manufactured and contained in a packaging bag until use, which is not a constant period but storage is often a long time as well. Therefore, the sterilized state needs to be maintained throughout the storage period. A bacteria impermeable film is used for the packaging bag for this purpose.
- Moreover, disinfection is conducted using sodium hypochlorite, hydrogen peroxide, and the like in hospitals, and these disinfectants may penetrate into the packaging bag. Since the packaging bag uses a bacteria impermeable film, introduction of a disinfectant is not required. Rather, it is preferable that the disinfectants do not penetrate into the packaging bag. This is because since these disinfectants have a bleaching action and the medical supplies are colored for identification, the colored medical supplies would be bleached.
- Patent Document 1 (JP H05-82221B) is well-known as a conventional packaging bag containing medical supplies. This has a double bag structure.
-
FIG. 3 illustrates the packaging bag for medical supplies disclosed inPatent Document 1, whereFIG. 3( a) is a top view,FIG. 3( b) is a cross section ofFIG. 3( a), andFIG. 3( c) is a top view illustrating a state without unnecessary parts. As shown in these drawings,medical supplies 1 are contained in aninner bag 2, and theinner bag 2 is contained in anouter bag 6, thereby constituting a double bag structure. - The
medical supplies 1 inPatent Document 1 include surgical suture thread, staples, sponges, pins, prosthetic skin, or the like, and are hydrolyzable or able to enter the body and breakdown by moisture. - The
inner bag 2 uses a heat-sealableplastic film 3, which is gas and bacteria impermeable, and afilm 4, which is gas permeable and bacteria impermeable. The periphery of thefilms seal part 5 a. Themedical supplies 1 are contained in such aninner bag 2, the opening is heat sealed to form aseal part 5 b, and then sealed. - This
inner bag 2 is then placed inside theouter bag 6. Theouter bag 6 is consisted of a film resulting from coating metal foil such as aluminum with heat-sealing resin, or laminating a resin film on metal foil such as aluminum. One of openings of theouter bag 6 is provided with a gas permeable and bacteriaimpermeable film 7. The periphery of theouter bag 6 is heat sealed except for an opening thereof, thereby forming aseal part 8 a. Theinner bag 2 is placed in theouter bag 6 and the opening is heat sealed to form aseal part 8 b.FIGS. 3( a) and 3(b) illustrate this state. - The sterilization method of the
medical supplies 1 is as follows. - A sterilizing gas such as ethylene oxide gas (EO gas) or the like is supplied to the entire
outer bag 6. The sterilizing gas enters into theouter bag 6 via thefilm 7, sterilizing the inner surface of theouter bag 6 and the outer surface of theinner bag 2. The sterilizing gas also enters into theinner bag 2 via the gaspermeable film 4, sterilizing the stored medical supplies and the inner surface of theinner bag 2. - After this, the double bag is placed in a vacuum device, degasification is performed, the sterilizing gas is discharged, and it is dried by a drying furnace, thereby removing the sterilizing gas and moisture from the
outer bag 6 and theinner bag 2. Heat sealing is conducted at a position slightly deviant from thefilm 7 of theouter bag 6, and as shown inFIG. 3( c), aseal part 8 c is formed and thefilm 7 portion is cut off, thereby completing the process. -
- [Patent Document 1] JP H05-82221B
- However, since the packaging bag shown in
FIG. 3 is made of a film of metal foil such as aluminum laminated on both front and back surfaces of theouter bag 6, the inside cannot be seen. Therefore, what the stored medical supplies are cannot be visually confirmed. - While both the
inner bag 2 and theouter bag 6 need only to be transparent synthetic resin films in order to be able to see inside, normally, such a film transmits not only O2, but sodium hypochlorite (NaCiO) and hydrogen peroxide (H2O2) for sterilization as well. - In the case where the
medical supplies 1 is suture thread, colored suture thread is normally used in order to display type, thickness, and the like of the suture thread. However, NaClO and H2O2 have disinfecting power and bleaching power, and when they penetrate into the inner bag, the color of the suture thread is bleached, whereby making the type of the suture thread indiscernible. Moreover, the suture thread is weakened by the bleaching chemical action. - The present invention, in light of the current condition, aims to provide a packaging bag, which allows visual confirmation of the content yet does not bleach medical supplies contained therein, a packaging bag containing medical supplies, and a packaging method for medical supplies.
- In order to attain the above objective, a packaging bag according to the present invention is characterized in that it includes two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O2, wherein a material that is gas permeable and bacteria impermeable is extended on the opening side of at least one of the films, and the periphery of the front and back films except for the opening is sealed.
- The transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O2 may be a plastic film coated with silica or alumina.
- A packaging bag containing medical supplies according to the present invention is characterized in that it includes two overlapped front and back films sealed at the periphery so as to keep medical supplies within, wherein the front and back films are both bacterial impermeable and do not transmit molecules as large as or greater than O2, and at least one of the front and back films is transparent. Note that the peripheral seal is not only when sealing the entire periphery, but also includes the case of sealing and leaving a part unsealed.
- Alternatively, it may have a double bag structure, keeping the packaging bag containing medical supplies in a larger packaging bag with the same structure but not containing any medical supplies. In this case, use of a transparent film for the same sides of the inner and outer bags allows visual confirmation of content from the outside.
- A packaging method for medical supplies according to the present invention is characterized in that it includes the steps of overlapping two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O2, extending a material that is gas permeable and bacteria impermeable on an opening side of at least one of the films, containing the medical supplies in a packaging bag which is formed by sealing the periphery of the front and back films except for the opening, and sealing the opening; sterilizing the packaging bag with sterilizing gas, either removing the gas after sterilization by vacuum or exchanging the gas with another gas (including air), and drying by dry heat or air drying; and sealing the packaging bag so that material portions of the packaging bag that is gas permeable and bacteria impermeable does not communicate with the inside of a stored bag.
- A film resulting from depositing silica or alumina on a transparent plastic film attains properties of maintaining transparency and not transmitting molecules as large as or greater than O2. Such a film is laminated together and sealed through heat sealing at the periphery except for an opening, into a bag shape. Medical supplies are contained in this bag, it is sterilized using a gas such as EOG, and then sealed. Formation of a material portion that is gas permeable and bacteria impermeable on the opening side of the bag allows sterilization using EOG or the like.
- According to the present invention, even if the packaging bag is exposed to H2O2 or sodium hypochlorite for disinfection after medical supplies are sealed therein, the H2O2 or sodium hypochlorite will not enter the packaging bag and may thereby prevent bleaching of the medical supplies. Moreover, since the films are transparent, content may be confirmed from the outside, which is an excellent result.
-
FIG. 1 illustrates a working example of the present invention, whereFIG. 1( a) is a top view of a packaging bag for medical supplies according to the present invention,FIG. 1( b) is a central cross section ofFIG. 1( a), andFIG. 1( c) is a top view of a state where medical supplies are contained in the packaging bag for medical supplies according to the present invention and sealed therein; -
FIG. 2 illustrates a working example of the present invention; and -
FIG. 3 illustrates a conventional packaging bag for medical supplies, whereFIG. 3( a) is a top view,FIG. 3( b) is a cross section ofFIG. 3( a), andFIG. 3( c) is a top view illustrating a state without unnecessary parts. - Embodiments according to the present invention are described with reference to accompanying drawings forthwith.
-
FIG. 1 illustrates a working example of the present invention, whereFIG. 1( a) is a top view of a packaging bag for medical supplies according to the present invention,FIG. 1( b) is a central cross section ofFIG. 1( a), andFIG. 1( c) is a top view of a state where medical supplies are contained in the packaging bag for medical supplies according to the present invention and sealed therein. - In general, various synthetic resin films such as PET, polypropylene, and nylon are gas permeable, and have a property of transmitting O2, of course, as well as hydrogen peroxide, sodium hypochlorite, and the like. The inventors of the present invention have found that deposition of silica and alumina on various synthetic resin films such as PET, polypropylene, and nylon allows achievement of a characteristic of not transmitting hydrogen peroxide and sodium hypochlorite while transmitting oxygen marginally, whereby this knowledge has lead to the completion of the present invention. Deposition methods for silica and alumina utilize PVD and CVD.
- Note that whether the film on which silica and alumina are deposited allows transmission can be thought to depend on the magnitude of the molecular weight thereof. Namely, the molecular weight of oxygen is 32, the molecular weight of hydrogen peroxide is 34, and the molecular weight of sodium hypochlorite is 74, and the film transmits those with smaller molecular weights than 32, where hydrogen peroxide and sodium hypochlorite with molecular weights greater than 32 are not transmitted as they are greater than the molecular weight of oxygen.
- While it has been said that the film does not transmit oxygen, hydrogen peroxide, and sodium hypochlorite, this is not meant in the strictest sense. Oxygen may be marginally transmitted, and hydrogen peroxide and sodium hypochlorite are only more difficult to be transmitted than oxygen, which does not mean that they are not transmitted through at all. However, since quantities of transmitting hydrogen peroxide and sodium hypochlorite are extremely minute, they are negligible. According to the inventors' experiment, favorable results were found when oxygen transmittance is 0.11 (cm3/m2 day·atm) or less under a condition of 23 degrees Celsius and 65% RH. Description of this experiment will be given as a working example.
- As shown in
FIGS. 1( a) and 1(b), apackaging bag 10 for medical supplies according to the present invention has afront side film 11 and abackside film 12. Both thefront side film 11 and thebackside film 12 are various synthetic resin films such as polypropylene or nylon on which silica and alumina are deposited, maintaining a transparent state. - In the working example of
FIG. 1 , thefront side film 11 and thebackside film 12 are both transparent and utilize the same material, but are not limited thereto. A transparent film on which silica or alumina is deposited should be used on at least one side. For example, either thefront side film 11 or thebackside film 12 may be a film made by laminating or coating a heat-sealing resin on metal foil such as aluminum. - A
film 13 made of a gas permeable, bacteria impermeable material is extended along an opening side (upper end in the drawing) of thefront side film 11. Thesefilms 11 to 13 are heat sealable, and left, right, and lower portions are heat sealed so as to form aseal part 16 a, thereby forming a bag shape. Alternatively, one sheet may be folded over at the central portion and sealed on two sides so as to form a bag shape. Themedical supplies 15 are contained in thispackaging bag 10, and the upper opening in the drawing is heat sealed to form aseal part 16 b. When theseal part 16 b is formed by folding one sheet, three sides are sealed. Themedical supplies 15 are not particularly limited as long as they are for medical use. Themedical supplies 15 are contained in a packaging bag in the above description, and sterilization processing will be executed next. - The sterilization processing is as follows.
- A sterilizing gas such as EO gas (ethylene oxide gas) or the like is supplied to the
entire packaging bag 10. The sterilizing gas enters into thepackaging bag 10 via thefilm 13, which is at the opening rim of thepackaging bag 10, sterilizing the inner and outer surfaces of thepackaging bag 10 and the containedmedical supplies 15. - After this, the
packaging bag 10 is placed in a vacuum device, degasification is performed, the sterilizing gas is discharged, and it is dried by a drying furnace, thereby removing the sterilizing gas from thepackaging bag 10. The sterilizing gas removal method, aside from the above method, may also be a method of exchanging it with another gas such as air, or a method of adding dry heat so as to dry it. Dry-heat sterilization is a sterilization method of thermal denaturalization and devitalization of microorganisms, enzymes, and proteins by heating at 160 to 200 degrees Celcius for 30 minutes to 2 hours. Once the sterilizing gas is removed, thefilms film 13 of thepackaging bag 10 does not communicate with the inside of thepackaging bag 10, thereby forming aseal part 16 c as shown inFIG. 1( c), and thefilm 13 portion is then cut off, completing the process. If theseal portion 16 c is formed, cutting off thefilm 13 portion may be omitted. - If the packaging bag in this state is stored at a hospital or the like, even if disinfection is carried out at the hospital using hydrogen peroxide and sodium hypochlorite, hydrogen peroxide and sodium hypochlorite no longer enters the
packaging bag 10, thereby allowing prevention of trouble such as suture thread being decolorized. -
FIG. 2 is a working example where thepackaging bag 10 containing themedical supplies 15 shown inFIG. 1 is contained in a larger,outer packaging bag 10′ having the same constitution as thepackaging bag 10. - The
packaging bag 10′ has the same structure as thepackaging bag 10. An opening of theouter packaging bag 10′ containing theinner packaging bag 10 is heat sealed so as to form theseal part 16 b, sterilization processing is executed in the same manner as for thepackaging bag 10, and theseal part 16 c is formed, thereby allowing the same double bag structure as inPatent Document 1. In this case, since thefilms packaging bag 10 and thepackaging bag 10′ be transparent in the case where one of thefilms - While the
packaging bag 10 and thepackaging bag 10′ have the same structure, this same structure referred to here means functionally the same structure, and thepackaging bag 10 and thepackaging bag 10′ are not limited to being made of the same material. - The
packaging bag 10 of the present invention produces improvements, such that contents may be visually confirmed if the films are PET coated with silica, chlorine gas is not generated even if it is burned after disposal, there is hardly any residue after burning, and it may be lighter than a film using aluminum foil. - Note that a transparent film that does not transmit any oxygen may be manufactured depending on type of plastic, deposition method of silica and alumina, and the like. If a film that does not transmit oxygen is used, the bag may be used for packaging hydrolyzable medical supplies.
- Table 1 shows results from an experiment using four types of packaging bags A, B, C, and D. In Table 1, thickness (μm) is thicknesses of the
films packaging bag 10 for medical supplies, where 50+80 denotes that thickness of thefilm 11 is 50 micrometers and that of theother film 12 is 80 micrometers. Both of these films have used a film on which silica is deposited on each side. -
TABLE 1 Oxygen 7 days later 14 days later Thickness transmission Change Change Sample (μm) (cm3/m2day) in color Strength in color Strength A 80 + 80 0.06 ⊚ 44.7 ⊚ 45.3 B 50 + 80 0.09 ⊚ 44.2 Δ 40.8 C 80 + 80 0.13 Δ 39.5 X 19.7 D 50 + 80 0.20 X 33.8 X 16.1 Control — — ⊚ 44.1 ⊚ 44.1 ⊚ No decolorization Δ Slight decolorization X Decolorization - Oxygen transmittance (unit is cm3/m2·day·atm) is transmission between inside and outside the
packaging bag 10. Oxygen transmittance of both thefilm 11 and thefilm 12 is in a combined state. - Change in color means that whether or not decolorization has occurred has been visually determined from change in color of the suture thread stored in the
packaging bag 10. - The
packaging bags 10 of the types A, B, C, and D contain the same suture thread, and each of thepackaging bags 10 was kept in a state exposed to hydrogen peroxide in a plastic container. Tensile strength and decolorization were determined after seven days and fourteen days. - A control had been prepared for comparative purposes and had the suture thread contained in the
packaging bags 10 of the types A, B, C, and D, but was not exposed to hydrogen peroxide. - Validity is investigated through comparison with the control, which has ideal quality having sufficient tensile strength without any change in color, as a reference for the experiment results.
- After seven days, A and B exhibited no decolorization, which is the same result as with the control, C had slight decolorization, and D had greater decolorization. Tensile strengths for A to D were 44.7 gf, 44.2 gf, 39.5 gf, and 33.8 gf, respectively, A and B had 100% tensile strength against the control, and C and D had 90% and 77%, respectively.
- After fourteen days, A exhibited no decolorization, which is the same result as with the control, B had slight decolorization, and C and D were completely decolorized. Tensile strengths for A to D were 45.3 gf, 40.8 gf, 19.7 gf, and 16.1 gf, respectively, and they had 100%, 93%, 45%, and 37% tensile strength against the control, respectively.
- The above results are found to be proportional to oxygen transmittance through examination by the inventors. To summarize the above results, A (0.06 oxygen transmittance) attained the same results as the control, and is considered a favorable film having ideal quality. B (0.09 oxygen transmittance) had slight decolorization and the tensile strength was favorable, and is thereby acceptable. C (0.13 oxygen transmittance) and D (0.20 oxygen transmittance) had complete decolorization as well as remaining strength was half or less than the control after fourteen days, and are thereby unusable. It is understood therefrom that there is no problem in use as long as the film had an oxygen transmittance of at least 0.09. Moreover, favorable use may be expected as long as the film has an oxygen transmittance of approximately 0.11, with consideration of a possible error of 0.09.
- Note that while silica-coated films have been used in the above working examples, the case of alumina coating may also be treated the same as the silica-coated film by setting the upper limit of oxygen transmittance to approximately 0.11.
-
- 10: Packaging bag for medical supplies
- 11: film (bacteria impermeable and does not transmit molecules of O2 or larger)
- 12: film (bacteria impermeable and does not transmit molecules of O2 or larger)
- 13: (gas permeable and bacteria impermeable) film
- 15: Medical supplies
- 16 a: Seal part
- 16 b: Seal part
- 16 c: Seal part
Claims (8)
1. A packaging bag for medical supplies comprising two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O2, wherein a material that is gas permeable and bacteria impermeable is extended on an opening side of at least one of the films, and the periphery of the front and back films except for the opening is sealed.
2. The packaging bag for medical supplies of claim 1 , wherein the transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O2 is a plastic film coated with silica or alumina.
3. A packaging bag containing medical supplies comprising two overlapped front and back films sealed at the periphery so as to contain medical supplies within, wherein the front and back films are both bacterial impermeable and do not transmit molecules as large as or greater than O2, and at least one of the front and back films is transparent.
4. A packaging bag containing medical supplies has a double bag structure, containing the packaging bag containing medical supplies of claim 3 in a larger packaging bag with the same structure but not containing any medical supplies.
5. The packaging bag containing medical supplies of claim 3 , wherein the transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O2 is a plastic film coated with silica or alumina.
6. A packaging method for medical supplies comprising the steps of:
overlapping two front and back films, at least one of which is transparent and are bacteria impermeable and do not transmit molecules as large as or greater than O2, extending a material that is gas permeable and bacteria impermeable on an opening side of at least one of the films, containing the medical supplies in a packaging bag which is formed by sealing the periphery of the front and back films except for the opening, and sealing the opening;
sterilizing the packaging bag with sterilizing gas, either removing the gas after sterilization by vacuum or exchanging the gas with another gas, and drying by dry heat or air drying; and
sealing the packaging bag so that material portions of the packaging bag that is gas permeable and bacteria impermeable does not communicate with the inside of a stored bag.
7. The packaging method for medical supplies of claim 6 , wherein the transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O2 is a plastic film coated with silica or alumina.
8. The packaging bag containing medical supplies of claim 4 , wherein the transparent film that is bacterial impermeable and does not transmit molecules as large as or greater than O2 is a plastic film coated with silica or alumina.
Applications Claiming Priority (3)
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JP2009-179143 | 2009-07-31 | ||
JP2009179143A JP2011030727A (en) | 2009-07-31 | 2009-07-31 | Packaging bag for medical supplies, packaging bag containing medical supplies, and method for packaging medical supplies |
PCT/JP2010/062569 WO2011013640A1 (en) | 2009-07-31 | 2010-07-27 | Packaging bag for medical supplies, packaging bag containing medical supplies, and method for packaging medical supplies |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/062569 A-371-Of-International WO2011013640A1 (en) | 2009-07-31 | 2010-07-27 | Packaging bag for medical supplies, packaging bag containing medical supplies, and method for packaging medical supplies |
Related Child Applications (1)
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US15/181,546 Continuation US10202215B2 (en) | 2009-07-31 | 2016-06-14 | Method for packaging medical supplies |
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US20120124943A1 true US20120124943A1 (en) | 2012-05-24 |
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US15/181,546 Active 2031-10-28 US10202215B2 (en) | 2009-07-31 | 2016-06-14 | Method for packaging medical supplies |
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EP (1) | EP2460506B1 (en) |
JP (1) | JP2011030727A (en) |
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Also Published As
Publication number | Publication date |
---|---|
US10202215B2 (en) | 2019-02-12 |
PL2460506T3 (en) | 2015-08-31 |
EP2460506B1 (en) | 2015-03-04 |
EP2460506A4 (en) | 2013-10-02 |
ES2538259T3 (en) | 2015-06-18 |
US20160311567A1 (en) | 2016-10-27 |
EP2460506A1 (en) | 2012-06-06 |
JP2011030727A (en) | 2011-02-17 |
WO2011013640A1 (en) | 2011-02-03 |
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