US20080093245A1 - Container with constrained quality maintenance agent - Google Patents
Container with constrained quality maintenance agent Download PDFInfo
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- US20080093245A1 US20080093245A1 US11/574,318 US57431805A US2008093245A1 US 20080093245 A1 US20080093245 A1 US 20080093245A1 US 57431805 A US57431805 A US 57431805A US 2008093245 A1 US2008093245 A1 US 2008093245A1
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- Prior art keywords
- container
- set forth
- enclosure
- quality maintenance
- contrast media
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/007—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests for contrast media
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
Definitions
- a container for holding and maintaining quality of a flowable substance generally comprises an enclosure for containing the flowable substance and a quality maintenance additive active to maintain the quality of the flowable substance.
- the quality maintenance additive is disposed relative to the enclosure so that the quality maintenance additive contacts the flowable substance prior to administration or consumption, such as when held in the enclosure.
- the quality maintenance additive is capable of acting on the flowable substance to maintain a quality characteristic of the flowable substance prior to administration or consumption, such as when held in the enclosure.
- the quality maintenance additive is associated with the enclosure so that it remains with the enclosure when the flowable substance is removed from the enclosure for administration or consumption.
- FIG. 5 is a bottom elevation of a plunger head of a syringe showing a chelating agent component mounted thereon;
- a plunger stem 13 shown separated from the plunger head 5 in FIG. 1 , can be connected in a suitable manner, as by mating threads (designated 15 and 17 , respectively), to the plunger head.
- the plunger so formed can be used to drive the plunger head 5 down within the barrel 3 to push the contrast media 11 through the nozzle 7 and out of the barrel at the time the contrast media is to be injected.
- the barrel 3 is formed in a conventional way with a flange 19 to facilitate driving the plunger down into the barrel. In the first embodiment illustrated in FIG.
- the chelating agent as a weak Ca or other metal ion complex
- the chelating agent can be coated on a container surface in the form of a polymer ink. See Proc. Intl. Soc. Mag. Reson. Med. 13 (2005) page 2142 for a description of the use of a polymer ink.
- the following publications describe examples of a methodology for the formation of stable, derivatized film coating on a silica surface: Anal. Chem. 2001, 73, 2429-2436 and Anal. Chem. 2003, 75, 3518-3530.
- the chelating agent could be incorporated into filter 45 which is secured to the lower end of a barrel 3 ′′ of a syringe 1 ′′, where the contrast media passes into a nozzle 7 ′′.
- a filter (not shown) having an incorporated chelating agent could be located away from the barrel 3 ′′.
- the filter could be positioned at the outlet of the nozzle 7 ′′ or downstream from the outlet before the contrast media is injected into the patient. In such cases, the filter would be sterilized.
Abstract
A container (63) having a quality maintenance additive (25, 31, 33, 41, 45, 65) which maintains the quality of a quantity of liquid (11, 14) or other flowable substance held in the container. The quality maintenance additive is associated with the container so that the quality maintenance additive remains with the container when the liquid or other flowable substance is emptied from the container.
Description
- This invention relates generally to storage containers and the storage of substances, and more particularly to a container for holding substances and maintaining their quality.
- The present invention has application in the medical field for medicine and drug storage containers. Particularly, the present invention can be applied to injectable therapeutic or diagnostic drug storage containers, including intravenous injectable drug containers. A more particularly useful application is for diagnostic contrast media containers.
- Liquids and other substances which are packaged, shipped and often stored have to be capable of remaining in an efficacious condition for extended periods of time. Almost always this quality or “shelf-life” of the substance is facilitated by the packaging itself, which may protect the substance from contact with air or exposure to sunlight, for example. In these instances, the pertinent properties of the packaging pertain to its ability to form a barrier. The substance being stored may itself contain quality maintenance components. As an example in the case of injectable therapeutic or diagnostic drug substances, the formulation itself may contain components which maintain the quality of the substance. The maintenance of “quality” or “a quality characteristic” of a substance may refer to, among other things, as the maintenance of stability, product attributes and sterility. For example, quality maintenance additives may fall into the class of antimicrobials (preservatives), antioxidants, buffering agents, and/or metal chelating agents (including calcium sequestering agents). Other examples of quality maintenance additives are given in JAMES C. BOYLAN ET AL., PARENTERAL PRODUCTS, in MODERN PHARMACEUTICS (Gilbert S. Banker et al. eds., 3rd ed., 1996), Chapter 12, pp. 441-460, 470, 471, 473-482, and 486-487, incorporated herein by reference. Pages 452-458 of MODERN PHARMACEUTICS particularly discloses added substances for use in parenteral formulations.
- The addition of quality maintenance additives to the substance itself requires that the additives not deleteriously affect the use of the substance. In the case of foods or medical products, components added must have minimal or no physiological effect when ingested, injected or otherwise introduced into the living subject.
- As one example, contrast media used for imaging the body must be stored while maintaining its efficacy and quality for extended periods. Contrast media may be used for radiographic imaging, magnetic resonance imaging, ultrasound imaging, optical imaging and/or nuclear imaging. Examples of such contrast media are Optiray® X-ray contrast media and OptiMARK® MRI contrast media available from Tyco Healthcare/Mallinckrodt of St. Louis, Mo. The contrast media is injected into the patient who is then subjected to an imaging procedure, the contrast media provides a greater contrast so that the image produced of the tissue in the interior of the patient's body is clearer and sharper.
- For instance, magnetic resonance imaging contrast media frequently includes a chelated paramagnetic metal ion in a complex, the most common metal ion being gadolinium (Gd+3) . Free metal ions are highly undesirable in a living system such as the human body. The contrast media must not have a concentration of free gadolinium metal ions that causes a significant physiological effect on the patient. In addition, it is possible for other metal ions (e.g., Fe+3, Pb+2) to be inadvertently introduced into the contrast media during the pharmaceutical manufacturing process.
- Manufacturing techniques are employed to minimize the introduction of unwanted metal ions. One step that is commonly taken is to add slight excesses of sodium/calcium salts of chelating agents (e.g., EDTA, DTPA, DTPA-BMEA, “versetamide”) to the contrast media to bind free ions of any metal ions introduced in manufacture and metal ions which may come out of their complex. The chelating agent can in some instances maintain the pH of the contrast media within an optimal effective range for extended periods. In some cases, pH of the contrast media may be controlled by the addition of buffering or stabilizing agents. As an example, OPTIRAY® X-ray contrast media contains tromethamine as a buffer. The effective amount of a buffering or chelating agent depends upon the particular application.
- In some other cases, the formulation may contain an antioxidant such as ascorbic acid or bisulfite. Of course, the additive is somewhat dependent upon the type of liquid being stored. Whatever the exact consumable or parenteral formulation being stored, where a quality maintenance additive is added, it is unavoidable that some (and usually all) of the agent will be introduced into the body when the product is taken in. It has been suggested in the case of contrast media that if such additives can be avoided, the occurrence of side effects in patients is reduced. See, R. Fattori et al., Iomeprol and Iopamidol in Cardiac Angiography: a Randomised, Double-blind Parallel-group Comparison, Eur. J Radiol. 18 Suppl. 1:S1-S12 (1994). However, quality maintenance additives are important to providing a product which Ls stable and of a consistent quality. Therefore, there is a need for a storage and delivery system in which these quality maintenance additives can still be used, but are prevented from entering the patient when the formulation is administered to the patient, or is consumed.
- In one aspect of the present invention, a container for holding and maintaining quality of a flowable substance generally comprises an enclosure for containing the flowable substance and a quality maintenance additive active to maintain the quality of the flowable substance. The quality maintenance additive is disposed relative to the enclosure so that the quality maintenance additive contacts the flowable substance prior to administration or consumption, such as when held in the enclosure. The quality maintenance additive is capable of acting on the flowable substance to maintain a quality characteristic of the flowable substance prior to administration or consumption, such as when held in the enclosure. The quality maintenance additive is associated with the enclosure so that it remains with the enclosure when the flowable substance is removed from the enclosure for administration or consumption.
- In another aspect of the present invention, packaged contrast media generally comprises a quantity of imaging contrast media contained in a syringe barrel, and a plunger head received in the barrel generally adjacent to one end of the barrel. A chelating agent element, as an example of quality maintenance additive, is in contact with the quantity of contrast media in the barrel for capturing free metal ions in the contrast media. The chelating agent is configured to remain with the syringe and not be carried by the contrast media upon ejection of the contrast media from the barrel.
- A method of forming a package of a quantity of flowable substance generally comprises associating a quality maintenance additive associated with a container. A quantity of flowable substance is provided which is loaded into the container. The quality maintenance additive is adapted to maintain the quality of the quantity of flowable substance. The association of the quality maintenance additive is such that the quality maintenance additive remains with the container when the flowable substance is emptied therefrom.
- Other features of the present invention will be in part apparent and in part pointed out hereinafter:.
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FIG. 1 is a longitudinal section of a syringe prepackaged with a contrast media and with a stem of a syringe plunger disconnected from a plunger head; -
FIG. 2 is an enlarged, fragmentary section of a barrel of the syringe taken in the plane including line 2-2 ofFIG. 1 and showing a layer of material applied thereto; -
FIG. 3 is an enlarged, fragmentary section of the plunger head taken in the plane including line 3-3 ofFIG. 1 and showing a layer of material applied thereto; -
FIG. 4 is an enlarged, fragmentary longitudinal section of a syringe having chelating agent components mounted thereon; -
FIG. 5 is a bottom elevation of a plunger head of a syringe showing a chelating agent component mounted thereon; -
FIG. 6 is a section taken in the plane including line 6-6 ofFIG. 5 ; -
FIG. 7 is an enlarged, fragmentary section of a syringe similar toFIG. 4 but including a filter at an outlet end of the syringe; -
FIG. 8 is a section of a bottle containing contrast media and a floating chelating agent component; and -
FIG. 9 is a section of a vial containing contrast media. - Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.
- Referring now to the drawings and in particular to
FIG. 1 , a prefilled syringe (broadly, “a container”) is generally indicated at 1. The syringe includes a barrel (generally indicated at 3), aplunger head 5 received in the barrel. The barrel 3 (broadly, “an enclosure”) tapers to anozzle 7 at a constricted end of the barrel. The plunger head is located near an open end 8 of thebarrel 3, closing the barrel at that end. Thenozzle 7 receives acap 9 which sealingly closes the nozzle, but can be removed to open the nozzle. A liquid, such as adiagnostic contrast media 11 which may be used for radiographic, magnetic resonance or ultrasound imaging, is contained in thebarrel 3 between thecap 9 and theplunger head 5. Aplunger stem 13, shown separated from theplunger head 5 inFIG. 1 , can be connected in a suitable manner, as by mating threads (designated 15 and 17, respectively), to the plunger head. The plunger so formed can be used to drive theplunger head 5 down within thebarrel 3 to push thecontrast media 11 through thenozzle 7 and out of the barrel at the time the contrast media is to be injected. Thebarrel 3 is formed in a conventional way with aflange 19 to facilitate driving the plunger down into the barrel. In the first embodiment illustrated inFIG. 1 , theplunger stem 13 would be initially disconnected from theplunger head 5 but packaged together with the assembledbarrel 3,contrast media 11, plunger head andcap 9. An example of a syringe of the same general type as described is shown in U.S. Pat. No. 6,648,860, the disclosure of which is incorporated herein by reference. - It will be appreciated that, except as described hereinafter, the construction of the
syringe 1 can be conventional. However, the present invention is not limited to syringes. A container may be a structure such as a syringe, vial, flask, bottle or jar, pharmacy bulk package or a flexible structure like a bag. The container may be made of glass, plastic, metal, a combination of glass, plastic and/or metal or other suitable materials and combinations of materials. Moreover, the broader term “container” may be taken to mean for purposes of this application structures such as a passage which would contain liquid or other flowable substance only for an instant as it flows through the structure. “Flowable substance,” as used herein, includes liquids, emulsions, suspensions and liposomes. The present invention has particular application to containers holding contrast media, and the description will be directed tocontrast media 11. However, the present invention is useful with any substance held in a container that can be beneficially affected by a quality maintenance additive which is associated with the container and not directly added to the substance itself in such a way that it is ejected or emptied with the substance from the container in use. - Examples of some types of quality maintenance additives to which the present invention applies are given above in the Background of the Invention. Chelating agents and buffering agents are the most common quality maintenance additives used for
contrast media 11, and the embodiments described herein will reference a chelating agent. It will be understood that although generally these additives act on the stored substance to maintain the quality of the stored substance, it is envisioned that a “quality maintenance additive” could also improve or change the quality of the stored substance in some predetermined fashion within the scope of the present invention. Often, the quality maintenance additive acts on the stored substance to remediate a condition which deviates from a desired quality characteristic of the stored substance. A quality characteristic may be, for example and without limitation, a certain pH range, the absence of microbes, the absence of positive metal ions, and prevention of oxidation. Moreover, the present invention is envisioned as having application outside the medical field. - The invention is described herein in terms of an embodiment in which the quality maintenance additive is a chelating agent. In a first embodiment of the present invention, a chelating/stabilizing agent (referred to hereafter as a “chelating agent”) is incorporated into a resin that forms the
plastic barrel 3 of thesyringe 1 using one of the many conventional methods known in the art. Typically, thesyringe barrel 3 is made from a polymer or resin material such as polyethylene, polypropylene, a copolymer of polyolefins, polyvinylchloride, polystyrene, polycarbonate, polyethylene terephthalate, cyclic olefin materials and like commonly used polymers. The container can also be made of glass or other suitable materials. One common way of producing thesyringe barrel 3 begins with a polymer produced by a basic polymerization reaction (e.g., polypropylene) to which is added, for example, an antioxidant, fiber material (for strength), colorant, nucleators (to improve stiffness and clarity), and possibly a lubricant. Optionally a chelating agent may be added to this mixture. The polymer may take the form of a powder, pellets or other suitable form. The mixture is fed into an extruder which melts the components and extrudes the mixture to form pellets which are sent to a second extruder that injects material into a mold to produce thebarrel 3. The chelating agent could be added at any suitable location, such as at either extruder, or between extruders. Heat may be applied to the extruder to facilitate melting. Extrusion polymerization (or reactive extrusion) can be used to functionalize the polymer or to modify existing functional groups on the polymer. - It is further envisioned that a resin already containing a chelating moiety or substituents capable of functioning as chelating agents could be added in place of the chelating agent by itself. Examples of such resin are suitable ion-exchange resins and QuadraPure® chemical and metal scavengers (functionalized macroporous and microporous resins commercially available from Sigma-Aldrich Corporation). For additional information on resins with such substituents, see “
Chapter 3. Ion Exchange” in “Separation and Purification Techniques in Biotechnology” by F. J. Dechow published in 1989 by Noyes Publications, Park Ridge N.J., USA. Other polymers that could be used for this purpose, i.e. crosslinked copolymers of basic vinyl heterocycles with another monomer coploymerizable therewith, are described in U.S. Pat. No. 5,094,867, the disclosure of which is incorporated herein by reference. - The chelating agent added to the resin mixture should be able to withstand the various molding process conditions, e.g. shear forces in the extruder and extrusion temperature. The chelating agent would be added in an amount which is sufficient to ensure that in the resin forming the
barrel 3, enough of the chelating agent is exposed on aninner wall 23 of the barrel to thecontrast media 11 to bind free metal ions in the contrast media. The chelating agent must not affect the strength of thebarrel 3 to the extent that it cannot function for its intended purpose, and preferably should also not affect the clarity of the barrel. Moreover other processes for forming the barrel that are known in the art could be used, such as sintering where the material could be hot or cold formed, or co-extrusion where only an internal layer includes the chelating agent and an outer layer(s) maintains desired mechanical properties. - Other versions of this form of the present invention are contemplated. For instance, the
head 5 of the plunger, and/or thecap 9 that closes thenozzle 7 could be made from a material including a chelating agent. As another option, chelating agents, such as DTPA or EDTA in the anhydride form, or buffering agents, such as tromethamine, could be attached (e.g., chemically bonded) to a suitable functional group, such as amine, primary amide, carboxylic, hydroxyl or phenolic group already present on the inner side of the container. Examples of such methods are well known in the art. The following recent publications are exemplary: Anal. Chem. 2005, 77, 30-35 and Anal. Chem. 2005, 77, 1096-1105. It is also envisioned that a chelating agent could be added to a mixture for making other containers such as a glass container. It will be appreciated that by associating the chelating agent with the syringe 1 (or other container such as a vial or bottle), the metal ions and chelating agents remain in the syringe after thecontrast media 11 has been ejected from the syringe. Thus, neither is injected into the patient. - In a second embodiment of the present invention, the quality maintenance additive can be applied to a surface of the container, as an example, syringe 1 (that is exposed to the contrast media 11) after the syringe is formed. It is well known to apply a lubricant, such as silicone to the
barrel 3 and/orplunger head 5 to facilitate sliding movement of theplunger head 5 along thewall 23 when used to eject thecontrast media 11 from the barrel. The quality maintenance additive, e.g. a chelating agent or a buffering agent, can be part of the silicone (or other lubricant), such as by being chemically attached to the silicone molecule or the other lubricant via a functional group (e.g., an amine, primary amide, carboxylic, hydroxyl or a phenolic group) in the silicone or the other lubricant.FIG. 2 illustrates alayer 25 of silicone including a chelating agent on theinner wall 23 of thebarrel 3. The silicone andchelating agent layer 25 sticks to theplunger head 5 or thebarrel 3 so that as the plunger head moves along the wall toward the nozzle end of the barrel, the silicone and chelating agent are not sheared off into thecontrast media 11 in any substantial quantity. - Although possible, typically the composition containing a lubricant and a chelating agent does not chemically bond with the resin material of the
barrel 3 when applied thereto. However, optionally, the lubricant with the quality maintenance additive, such as a chelating agent or a buffering agent, could be either chemically or by some other fashion bonded to the surface of the container such as the syringe barrel and/or the plunger. The Gelest Catalog 3000-A titled “Silicon Compounds: Silanes & Silicones” published by Gelest, Inc. in 2004 describes examples of this and other related methods. For other methods of coating surfaces, see “Organic Coatings: Science and Technology”, second edition 1999, edited by Z. W. Wicks, Jr., F. N. Jones and S. Peter Pappas and published by Wiley-Interscience. - It will be understood that the chelating agent could be applied without being formulated as part of a lubricant. For instance, if the material of the
barrel 3 and/or theplunger head 5 includes a lubricant as a component it would not require additional lubricant applied to the plunger head or the barrel. It is also envisioned that the chelating agent could be attached to a material applied to thebarrel 3 and/orhead 5 which is not a lubricant. The material would not interfere with the normal operation of the lubricant, but allow the chelating agent to act on the liquid in thebarrel 3. Moreover, if the container is not a syringe and does not have aplunger head 5 engaging and moving along aninner wall 23 of thebarrel 3, no lubricant is needed. The chelating agent can be formulated in any suitable manner for adhering to the inner wall of the container. Also, physical roughening or etching can be employed to increase the surface area of theinner wall 23, so that the inner wall may then be more readily coated with a material such as a lubricant that is bonded with desired quality maintenance additive(s), such as a chelating agent. - The layer of silicone or other material including a chelating agent (
FIG. 2 ) can be applied in several ways. Conventionally, silicone can be applied by spraying, and could be so applied when formulated with a chelating agent. One type of silicone elastomer believed to be suitable is used to manufacture SILICON® autoclavable silicone tubing, available from NewAge Industries of Southampton, Pa. In manufacture, the barrels (prior to insertion of the plunger head 5) may be inverted so that the large open end 8 faces down and thenozzle 7 is located at the top. A spray head (not shown) may be inserted into the large open end 8 of thebarrel 3 for spraying onto theinner wall 23 of the barrel. A high pressure spray release using a suitable gas such as air or nitrogen as a carrier may be employed. As one alternative, spattering could be used to apply the silicone and chelating agent composition. Spattering can be carried out by vibrating a membrane (not shown) so that it will throw off the material to be deposited. It is also possible to heat the material so that it spatters onto thebarrel 3. More generally, heat, such as applied by a high voltage arc, may be applied to break down the material for redepositing on thebarrel 3. Still further, the silicone and chelating agent may be applied by dipping thebarrel 3 into a liquid form of the material so that a layer is deposited in the barrel. Similarly, thebarrel 3 could be tumbled in an emulsion of the chelating agent (or silicone and chelating agent) suspended in water or alcohol (or other suitable emulsifier) to deposit a layer of the chelating agent within the barrel. Other ways of applying the silicone and chelating agent to thebarrel 3 that are known to those of ordinary skill in the art also may be employed. - Alternatively, as an example, the chelating agent, as a weak Ca or other metal ion complex, can be coated on a container surface in the form of a polymer ink. See Proc. Intl. Soc. Mag. Reson. Med. 13 (2005) page 2142 for a description of the use of a polymer ink. The following publications describe examples of a methodology for the formation of stable, derivatized film coating on a silica surface: Anal. Chem. 2001, 73, 2429-2436 and Anal. Chem. 2003, 75, 3518-3530.
- The chelating agent could also be applied in a conformal coating (vapor deposition) process. A suitable material in dimer form (e.g., parylene, polypropylene), including a chelating agent element is heated to a vapor phase in a vacuum chamber. The
barrel 3 of thesyringe 1 is also placed in the vacuum chamber. The vapor flows over and is deposited on the entire exposed surface area of thebarrel 3 in a highly uniform layer. The deposited material on thebarrel 3 attaches to the material of the barrel, forming a strong connection between the deposited material and the barrel. It is also envisioned that other techniques for associating the chelating agent (or other quality maintenance additive) with thebarrel 3 could be used, such as nanocoating technology or a biologically active coating technique e.g., using an appropriately derivatized agent of hyaluronan. See, for example, “The chemistry, biology and medical applications of Hyaluronan and its derivatives”, ed. T. C. Laurent, Wenner-Gren International Series Vol. 72, Portland Press, London. - Referring to
FIG. 3 , the layer of material including the chelating agent can also be applied to theplunger head 5. The face of the plunger head does not engage theplunger head 5 of thebarrel 3, so that the chelating agent would not need to be part of a lubricant and would not be subject to shear forces. The chelating agent can be applied in the same ways as described above for application of a layer of material to theinner wall 23 of thebarrel 3. Moreover, the formulation of the material of theplunger head 5 could include a chelating agent, as described above for thebarrel 3. - A third embodiment provides a chelating agent that is formed as a separate component and positioned so as to contact the contrast media. Ideally (although not exclusively), these components would be placed in a
syringe 1′ in areas which are not subject to wear by action of aplunger head 5′ moving in abarrel 3′. Corresponding parts of the third embodiment will be labeled with the same reference numerals as for the first and second embodiments, with the addition of a trailing prime. As shown inFIG. 4 , the component could be aring 31 of material including the chelating agent. Alternatively, or in addition to thering 31 as shown inFIG. 4 , aplug 33 of material including a chelating agent may be mounted in acap 9′ so that it is exposed to the contrast media (not shown) at the outlet end of anozzle 7′. The component material could be porous or nonporous. The advantage of having a porous material would be in the increase of surface area to which the contrast media can be exposed. As one example, thering 31 and plug 33 could be made of a sintered polypropylene or EPTFE impregnated with a chelating agent, for example, the ion-exchange resin or QuadraPure™ resin. Thebarrel 3′ andring 31 are formed so that the ring fits in the lower end of the barrel above the nozzle between an innerannular rib 35 and an outer concentricannular rib 37 that are formed in the bottom of the barrel to increase the strength of the barrel. In this location, thering 31 does not interfere with movement of the plunger head (not shown) and is not subject to wear by engagement with the plunger head. - A
plunger head 5′ in a modified form of the embodiment ofFIG. 4 is illustrated inFIGS. 5 and 6 . Aring 41 including a chelating agent is formed so that it can be mounted within theplunger head 5′. As shown inFIG. 5 , thering 41 faces and is open to the contrast media. In this embodiment, thering 41 forms part of the surface of the plunger head that pushes the contrast media out of the syringe barrel. Theplunger head 5′ may be used in conjunction with thering 31 and/or plug 33 ofFIG. 4 , or may be used by itself. It will be appreciated that other locations of a chelating component (not shown) within a syringe may be used without departing from the scope of the present invention. - In yet another version of this third embodiment shown in
FIG. 7 , the chelating agent could be incorporated intofilter 45 which is secured to the lower end of abarrel 3″ of asyringe 1″, where the contrast media passes into anozzle 7″. A filter (not shown) having an incorporated chelating agent could be located away from thebarrel 3″. The filter could be positioned at the outlet of thenozzle 7″ or downstream from the outlet before the contrast media is injected into the patient. In such cases, the filter would be sterilized. If the filter (not shown) is away from the syringe, it is still “associated” with the syringe in the sense that it does not move with the contrast media into the patient, but remains with the syringe outside the patient's body. The contrast media from thebarrel 3″ can still flow through the filter to remove metals as described for thefilter 45. Parts corresponding to those of thesyringe 1 are given the same reference numeral, followed by a double prime. Although shown solid, thefilter 45 has small pores which would permit passage of the contrast media through the filter. Even further, the chelating agent could be formed as a film which is laminated to the syringe barrel and/or plunger head. It is believed that a laminated film layer would add strength to the barrel, reducing the possibility of syringe cracking during use. If the chelating agent is laminated to the inner wall of the barrel, it would need to be smooth enough to allow the plunger head to slide along the material, and robust enough to avoid being sheared off by the movement of the plunger head. The laminated film layer appears similar to thelayer 25 illustrated inFIG. 2 . -
FIG. 8 illustrates a container in the form of a bottle (indicated generally at 53) containing acontrast media 11′ and including alid 55. Thebottle 53 may be made of a suitable material, such as glass or plastic, by conventional processes known in the art. In this further modification of the embodiment ofFIG. 4 , the chelating agent component is not attached to or mounted on any part of thebottle 53. The component takes the form of adisk 57 which may float or rest on the bottom of the bottle in thecontrast media 11′. Moreover, it is envisioned that thedisk 57 could be fixed to the bottle (e.g., at the bottom of the bottle). Still further, the chelating agent component may not have a disk shape. For example, the chelating agent component could take the form of microspheres or beads (spherically or otherwise shaped) For example, the microspheres could be coated with materials containing a quality maintenance additive or the quality maintenance additive attached either chemically or by any other conventional method known in the art. As long as the beads (or other forms of chelating agent component) are large enough not to be taken into a syringe through a needle opening, they need not necessarily be larger than the container opening. Moreover, the beads may float or rest on the bottom of the container. Thedisk 57 may be formed in a decorative manner, or may be marked withinformation 59 identifying the maker or type of product. Thebottle 53 is formed with aneck 61 optionally having an internal diameter that is smaller than thedisk 57 so that the disk is trapped in the bottle when thecontrast media 11′ is poured out. - The configuration of the
bottle 53 and/ordisk 57 may be other than described without departing from the scope of the present invention. For example, a container (not shown) may gradually taper in internal diameter from the bottom to the top. As another example, the chelating agent could be formed as beads that are contained in a porous container (e.g. a mesh bag) that allows the beads to be in liquid contact with the contrast media. -
FIG. 9 illustrates a version of the present invention in the form of a vial generally indicated at 63. The version is similar toFIG. 8 in that the chelating agent component is adisk 65 that floats or rests on the bottom of the bottle in thecontrast media 11″. Thevial 63 may be made of a suitable material, such as glass or plastic. It will be understood that the chelating agent may be incorporated into the material of thevial 63. The vial includes apuncturable seal 67 covered by acap piece 69. - When introducing elements of the present invention or the preferred embodiment(s) thereof, the articles “a”, “an”, “the” and “said” are intended to mean that there are one or more of the elements. The terms “comprising”, “including” and “hasting” are intended to be inclusive and mean that there may be additional elements other than the listed elements. The use of terms indicating a particular orientation (e.g., “top”, “bottom”, “side”, etc.) is for convenience of description and does not require any particular orientation of the item described.
- As various changes could be made in the above without departing from the scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (40)
1. A container for holding and maintaining quality of a flowable substance, the container comprising an enclosure for containing the flowable substance and a quality maintenance additive active to maintain the quality of the flowable substance, the quality maintenance additive being disposed relative to the enclosure so that the quality maintenance additive contacts the flowable substance when held in the enclosure, the quality maintenance additive being capable of acting on the flowable substance to maintain a quality characteristic of the flowable substance when held in the enclosure, the quality maintenance additive being associated with the enclosure so that it remains with the enclosure when the flowable substance is removed from the enclosure.
2. A container as set forth in claim 1 wherein the enclosure constrains the quality maintenance additive from leaving the enclosure.
3. A container as set forth in claim 2 wherein the quality maintenance additive is part of a composition of material forming the enclosure.
4. A container as set forth in claim 2 wherein the enclosure includes at least one surface disposed for contact with flowable substance held in the container, the quality maintenance additive being disposed on said one surface.
5. A container as set forth in claim 4 wherein the quality maintenance additive disposed on said one surface is chemically bonded to the enclosure.
6. A container as set forth in claim 4 further comprising another material disposed on said one surface of the enclosure, the quality maintenance additive being in composition with said other material.
7. A container as set forth in claim 6 wherein said one surface of the enclosure is etched prior to depositing said other material thereon.
8. A container as set forth in claim 7 wherein said other material is a lubricant.
9. A container as set forth in claim 2 wherein the quality maintenance additive is formed as a piece separate from the enclosure.
10. A container as set forth in claim 9 wherein the quality maintenance additive piece is disposed in the enclosure, the enclosure including an outlet sized for preventing the quality maintenance additive piece from leaving the enclosure.
11. A container as set forth in claim 10 in combination with flowable substance contained in the enclosure, the quality maintenance additive piece being at least partially immersed in the flowable substance.
12. A container as set forth in claim 9 wherein the quality maintenance additive piece is attached to the enclosure in a position for contact with flowable substance contained in the enclosure.
13. A container as set forth in claim 12 wherein the quality maintenance additive piece is a film laminated to the enclosure.
14. A container as set forth in claim 9 wherein the quality maintenance additive piece comprises a filter adapted to receive the flowable substance therethrough upon removal of the flowable substance from the enclosure.
15. A container as set forth in claim 1 wherein the quality maintenance additive is capable of remediating a quality characteristic of the flowable substance.
16. A container as set forth in claim 1 wherein the quality maintenance additive is selected from at least once of an antimicrobial, an antioxidant, a chelating agent or a buffering agent.
17. A container as set forth in claim 16 wherein the quality maintenance additive is a chelating agent.
18. A container as set forth in claim 17 in combination with the flowable substance, and wherein the flowable substance comprises a contrast media.
19. A container as set forth in claim 18 wherein the chelating agent piece is floated in the contrast media.
20. Packaged contrast media comprising:
a quantity of imaging contrast media;
a container containing the quantity of the contrast media therein;
a quality maintenance agent in contact with the quantity of contrast media for maintaining the quality of the contrast media, the quality maintenance agent being configured to remain with the container and not being carried by the contrast media upon removal of the contrast media from the said container.
21. Packaged contrast media as set forth in claim 20 wherein, the container is selected from a vial, a bottle, a syringe, a bag or a pharmacy bulk package.
22. Packaged contrast media comprising:
a quantity of imaging contrast media;
a syringe barrel containing the quantity of the contrast media therein;
a plunger head received in the barrel generally adjacent to one end of the barrel;
a chelating agent element in contact with the quantity of contrast media in the barrel for capturing free metal ions in the contrast media, the chelating agent being configured to remain with the syringe and not be carried by the contrast media upon ejection of the contrast media from the barrel.
23. Packaged contrast media as set forth in claim 22 wherein the chelating agent is associated with at least one of the barrel and the plunger head.
24. Packaged contrast media as set forth in claim 23 wherein the chelating agent comprises a layer of material attached to one of the barrel and the plunger head.
25. Packaged contrast media as set forth in claim 24 wherein the layer of material includes a lubricant.
26. Packaged contrast media as set forth in claim 24 wherein the layer of material is a film laminated to at least one of the barrel and plunger head.
27. Packaged contrast media as set forth in claim 23 wherein the contrast agent is incorporated into material forming at least one of the barrel and the plunger head.
28. Packaged contrast media as set forth in claim 23 further comprising a piece made from material including a chelating agent, the piece being mounted on one of the barrel and the plunger head.
29. Packaged contrast media as set forth in claim 22 further comprising a piece made from material including a chelating agent.
30. Packaged contrast media as set forth in claim 29 wherein the chelating agent component comprises a filter arranged to receive contrast media therethrough upon ejection of the contrast media from the barrel.
31. A method of forming a package of a quantity of flowable substance, the method comprising:
associating a quality maintenance additive with a container;
providing a quantity of flowable substance;
loading the quantity of flowable substance into the container, the quality maintenance additive being adapted to maintain the quality of the quantity of flowable substance, the association of the quality maintenance additive being such that the quality maintenance additive remains with the container when the flowable substance is emptied therefrom.
32. A method as set forth in claim 31 wherein the step of associating a quality maintenance additive comprises formulating material with a quality maintenance additive and forming the container from the material.
33. A method as set forth in claim 31 further comprising the step of depositing a substance including the quality maintenance additive onto a surface of the container which will be exposed to the quantity of flowable substance loaded therein.
34. A method as set forth in claim 33 further comprising the step of etching the surface of the enclosure prior to depositing the substance including the quality maintenance additive thereon.
35. A method as set forth in claim 34 wherein the step of depositing the substance comprises one of spraying the substance onto the container surface, vapor depositing the substance onto the container surface, and laminating a film including the quality maintenance additive onto the container surface.
36. A method as set forth in claim 31 further comprising forming a piece including the quality maintenance additive separately from the container and operatively connecting the piece to the container.
37. A method as set forth in claim 36 wherein the step of associating the quality maintenance additive with the container comprises fixing the piece to the container.
38. A method as set forth in claim 36 wherein the piece is floated in the quantity of flowable substance.
39. A method as set forth in claim 36 wherein the piece rests on the bottom of the container.
40. A container for holding and maintaining quality of a flowable medical substance for use in medical diagnostics and/or treatment, the container comprising an enclosure for containing the flowable medical substance and a quality maintenance additive active to maintain the quality of the flowable medical substance, the quality maintenance additive being disposed relative to the enclosure so that the quality maintenance additive contacts the flowable medical substance when held in the enclosure, the quality maintenance additive being capable of acting on the flowable medical substance to maintain a quality characteristic of the flowable medical substance when held in the enclosure, the quality maintenance additive being associated with the enclosure so that it remains with the enclosure when the flowable medical substance is removed from the enclosure.
Priority Applications (1)
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US11/574,318 US20080093245A1 (en) | 2004-09-28 | 2005-09-28 | Container with constrained quality maintenance agent |
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Also Published As
Publication number | Publication date |
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EP2436409A1 (en) | 2012-04-04 |
EP1809351A2 (en) | 2007-07-25 |
WO2006037124A3 (en) | 2006-06-29 |
WO2006037124A2 (en) | 2006-04-06 |
JP2008514374A (en) | 2008-05-08 |
EP2436410A1 (en) | 2012-04-04 |
JP2011062548A (en) | 2011-03-31 |
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