Methods for preparing autologous blood eye drops

Abstract

A convenience kit for sterilizing and delivering liquids into the safety of a sterile environment inside a plastic bag (which can be disposed in a field environment) wherein a so sterilized liquid is dispensed into a vessel which is capped and sealed before removal from the bag. The convenience kit can be provided in a solitary format or, as a subkit combined with other associated items in a more inclusive convenience kit. In short, convenience kits made according to the present invention provide opportunity for accomplishing an aseptic liquid sterilizing transfer, a task which is commonly associated with on-hand capability of a laminar flow hood, in field environments and other areas which are remote from facilities having laminar flow hoods.

Claims

1. A method for providing a convenience kit for sterilizing and displacing a predetermined volume of liquid into at least one vessel disposed within a plastic bag whereby the liquid within the vessel is delivered from the bag with the liquid in an aseptic state, said method comprising the steps of: providing: the plastic bag comprising an opening through which bag contents can be displaced and an otherwise closed and shrouding surface, said surface comprising sufficient thickness to impede fluid displacement there through and surface area to permit the liquid to be displaced into the at least one vessel: a sterilizing grade filter comprising a pair of extended length fluid communicating conduits providing a passageway to and from said filter; the at least one vessel comprising a liquid storage chamber and an orifice through which liquid is dispensed into said chamber; at least one cap for securely closing and sealing said orifice; perforating and displacing one of said conduits through a section of said surface into said bag, providing components for constructing a fluid tight seal about said perforated section and said so displaced conduit and affixing the components about the one conduit to enclose and seal the perforation of the section; closing and sealing said opening to prevent fluid flow there through; and sterilizing the bag and contents therein.

2. A method according to claim 1 wherein the providing step comprises providing a plurality of vessels and a plurality of caps for each of said plurality of vessels.

3. A further method according to claim 2 comprising a further step wherein a predetermined volume of liquid is dispensed through an exterior, exposed conduit of said filter, sterilized and further dispensed through an orifice into a sterile chamber of a selected vessel and the so filled vessel is capped to preserve the aseptic state of the liquid.

4. A method according to claim 3 wherein, after capping and sealing closed each so filled vessel, said bag is opened for access to the vessels.

5. A method according to claim 4 wherein said contents comprise a receptacle for stabilizing said plurality of vessels during dispensing and as an additional step, said vessels are displaced into the receptacle prior to the step of closing and sealing the opening.

6. A method according to claim 1 comprising an additional step comprising providing a tray comprising a compartment for said convenience kit and other compartments for items to be used with said convenience kit and an attachable cover for the compartments with all items being disposed within the tray and covered for cleanliness protection.

7. A method according to claim 1 wherein the providing at least one vessel step comprises providing a medical syringe.

8. A method according to claim 1 wherein the content providing step comprises providing components which are radiation stable.

9. A method according to claim 3 comprising a further step of disposing said convenience kit in an unsterile environment prior to the liquid dispensing step.

10. A method according to claim 3 wherein said predetermined volume comprises dispensing more than one dispensing action wherein two different liquids are dispensed for mixing.

11. A method according to claim 1 wherein said providing step comprises further steps of providing a tray and an associated cover wherein said plastic bag and contents are disposed for storage and transport.

12. A method according to claim 11 wherein said tray providing step comprises providing a tray comprising compartments whereby items disposed within said compartments are separated.

13. A convenience kit for sterilizing and displacing a predetermined volume of liquid into at least one vessel disposed within a plastic bag whereby all contents within the bag are available for delivery from the bag in an aseptic state, said convenience kit comprising: the plastic bag comprising an initially exposed opening through which bagged kit contents can be displaced into the bag and an otherwise closed and shrouding surface, said surface comprising sufficient continuity and thickness to obstruct fluid displacement there through, volume capacity to permit the liquid to be displaced into the at least one vessel and flexibility and suppleness for digital manipulation; the at least one vessel module comprising a liquid storage chamber and an orifice through which liquid is dispensed into said chamber disposed in said bag; at least one cap module for securely closing and sealing said orifice after liquid is dispensed therein disposed in said bag; a filter component comprising a sterilizing grade filter and a pair of opposing extended length fluid communicating conduits providing a passageway to and from said filter; said bag further comprising a single hole, formed by perforating said surface of said bag, through which one of said conduits is displaced into said bag; parts for constructing a fluid tight seal about said hole and conduit whereby said hole is enclosed and sealed; said opening being closed and sealed once the modules and parts are disposed therein; and said bag and all enclosed items being sterilized after bag closure.

14. A convenience kit for sterilizing and displacing a predetermined volume of liquid into at least one vessel disposed within a plastic bag whereby all contents within the bag are available for delivery from the bag in an aseptic state, said convenience kit comprising: the plastic bag comprising an initially exposed opening through which bagged kit contents can be displaced into the bag and an otherwise closed and shrouding surface, said surface comprising sufficient continuity and thickness to obstruct fluid displacement there through, volume capacity to permit the liquid to be displaced into the at least one vessel and flexibility and suppleness for digital manipulation; the at least one vessel module comprising a liquid storage chamber and an orifice through which liquid is dispensed into said chamber; at least one cap module for securely closing and sealing said orifice after liquid is dispensed therein; a filter component comprising a sterilizing grade filter and a pair of opposing extended length fluid communicating conduits providing a passageway to and from said filter; said bag further comprising a single hole, formed by perforating said surface of said bag, to provide a pathway for displacing fluids into said bag; one of said conduits being affixed to said bag at said hole whereby all fluid dispensed into said bag is dispensed through said conduit after being displaced through said filter whereby sterility of all matter within said bag is maintained.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is a perspective of a plastic bag having an open end with a filter component disposed outside the bag and associated assembly and sealing and components and an assembly tool disposed within confines of the bag.

[0036] FIG. 1A is a perspective of a section of tubing to be used as a sealing interface gasket having predetermined length and internal diameter relative to the filter component seen in FIG. 1.

[0037] FIG. 2 is a perspective of a segment of the bag seen in FIG. 1 with a portion of the filter component disposed outside the bag and another portion disposed through an orifice disposed in the bag (but unseen) and interconnected orifice sealing components disposed within the bag.

[0038] FIG. 3 is a perspective of a receptacle designed for use in an exemplary application of the present invention, the receptacle providing for stabilizing receiving vessels and caps within the bag.

[0039] FIG. 4 is a perspective of a vessel to be disposed within the receptacle seen in FIG. 3.

[0040] FIG. 5 is a perspective of a cap for closing and providing a seal to protect contents of the vessel seen in FIG. 4.

[0041] FIG. 6 is a perspective of the receptacle seen in FIG. 3 filled with vessels seen in FIG. 4 and caps seen in FIG. 5.

[0042] FIG. 7 is a perspective of a bag comprising an affixed filter as seen in part in FIG. 2 and a filled receptacle disposed within a bag and the open end closed and sealed.

[0043] FIG. 8 is a perspective of the bag and filled receptacle seen in FIG. 7 disposed with bag folded and filter component displaced to a stable site for storage and shipping.

[0044] FIG. 9 is a perspective of a syringe affixed to the filter component and disposed to tent the bag to permit liquid product to be dispensed from the syringe into vessels within the receptacle.

[0045] FIG. 10 is a perspective of parts seen in FIG. 9 wherein the syringe is disposed above a vessel to permit liquid dispensing therein.

[0046] FIG. 11 is a perspective of a multi-compartment tray wherein the bagged component kit (of the instant invention) is seen to reside along with other components within a more inclusive and complex kit.

[0047] FIG. 12 is a perspective of the tray seen in FIG. 11 with a package cover partially enclosing contents of the inclusive kit.

[0048] FIG. 13 is a perspective of a separate application for a convenience kit made according to the present invention wherein a syringe is disposed within a bag for receiving liquids dispensed from outside the bag.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

[0049] In this description, the term proximal is used to indicate a segment of a device normally closest to an object of the sentence describing its position. The term distal refers a segment oppositely disposed. Reference is now made to the embodiments illustrated in FIGS. 1-13 wherein like numerals are used to designate like parts throughout. For parts which are similar but not the same as parts originally specified with a given number, a prime of the original numbers is used.

[0050] While kits made according to the invention may be configured to provide assemblies for many medical procedures, such as those, for example, involved with sterile washes and drugs for home-care, antibiotics, operating room and pediatrics, disclosure of an exemplary application in the area of preparation of a specialized eye-wash is herein selected to provide examples and details of the instant invention while clearly demonstrating critically important safety and time and work saving features.

[0051] Reference is now made to FIG. 1 wherein significant components of a convenience kit 10 made according to the instant invention are seen. The components are:

[0052] a. a sterilizing filter component 20 comprising a filter casing 22, two elongated fluid communicating conduits with luer fittings on an end disposed away from filter component 20, (i.e. a first conduit 24 comprising a female luer fitting 26 and a second conduit 28 with a male luer fitting 30). A filter (not shown) is disposed within filter component 20, through which all fluid displaced through the conduits 24 and 28 must pass. The filter is a medical grade sterilizing filter which is defined to be on the order of a 0.2 micron filter rating. Filter component 20 should have a substantially planar face 32 for interfacing with a portion of the exterior surface of an associated plastic bag. Such a filter is currently available commercially as a Merck Millipore MILLEXGS Sterilizing Filter unit.

[0053] b. a pliant, preferably clear plastic bag 40 comprising a continuous surface 42 and a single opening 44 which is heat sealable. Such a bag is found commercially in many forms. As an example, a 1.4 mil poly leak-proof, heat sealable bag is currently preferred. The selected bag should be sized to permit digital access to contents within the bag. Such bags can be perforated by a sharp object such as a common pin at a desired perforation site (in this example, site 50). Note that site 50 can be determined to be any desired place on the surface of bag 40 which permits desired digital maneuvering of filter component 20. At such a perforation, material characteristics of the bag permit displacement of a conduit part through the point of perforation with only an increase in hole size equivalent to circumference of the perforating member (i.e. in this case, filter conduit 28).

[0054] c. three components which can be used to seal the perforated hole at site 50. [0055] The first component 60 is preferably a section of tube stock which is elastic, pliant, and incompressible having an internal diameter which tightly fits about conduit 28 adjacent filter casing 22 and preferably has an external diameter 66 (see FIG. 1A) which provides a inch cushion about conduit 28 and a length 64. An example of such tube stock is silicone tubing. [0056] The second component 70 performs as a nozzle extension for conduit 28 and preferably comprises a female luer fitting 72 comprising side flanges 74 which are designed to be luer-lock latches. Fitting 70 can be a conventional male/female luer-lock fitting. Component 70 also preferably has a pair of rigid side wings 76. [0057] The third component 80 is a washer shaped component which is sized to communicate with fitting 72 flanges 74 and a proximal surface of component 60. Component 80 should be sufficiently rigid to retain a planar form when disposed to communicate connective forces between fitting 72 and tubing component 60 to thereby provide gasket support. [0058] Note that component 60 (being and interface gasket) when used as a gasket part is disposed about conduit 28 between flanges 74 and face 32. Component 60 should be a section of tubing having a length, as cut, which is sufficiently greater than the distance between flanges 74, and face 32 of filter component 20 to provide force forming a fluid tight seal against bag 40 interior surface in contact with planar face 32, but short enough to not generate a force sufficient to disengage component 70 from conduit 28.

[0059] A filter to bag fabrication tool 90 is seen to provide a walled hole 92 which has a pair of slots (not shown) disposed to fit about side wings 76 to retard component 70 from rotating as component 70 is securely affixed to conduit 28 (by conventional luer fitting attachment technique). Assembly process is as follows: [0060] Components 60, 80 and 70 and tool 90 are disposed within bag 40. Component 70 is displaced into hole 92 such that wings 76 are retarded from rotating. Bag surface 42 is pierced at site 50 providing a pin sized hole. Conduit 28 is forcefully displaced through bag surface 42 at site 50. Component 60 is displaced about conduit 28. Component 80 is next displaced about conduit 28 in contact with component 60. Then, making a luer connection, component 70 is securely affixed to conduit 28. It is preferable that an adhesive is disposed to interface between connecting surfaces of conduit 28 and component 70 to assure long term product stability. Tool 90 is displaced from bag 40.

[0061] In FIG. 2, an assembled combination is seen showing filter component 20 affixed through a closed and sealed hole to bag 40 (showing female luer fitting 26 disposed outside bag 40) and components 60,80 and 70 linearly disposed within bag 40. Only a segment 94 of bag 40 is seen for clarity of presentation.

[0062] Attention is now referenced to FIGS. 3, 4 and 5 wherein components of a set for producing a sterile eye-wash product are seen. In FIG. 3, a stabilizing tray 100 is seen to comprise a series of cavities, generally numbered 102, each of which has a specific purpose as disclosed hereafter. Tray 100 may be made of polystyrene or other rigid plastic which is radiation stable. Vacuum or other molding methods may be employed to fabricate tray 100. In this example, cavities 102 which are dedicated to eye-wash receiving vessels are also numbered 104. Cavities 102 which are dedicated to caps for the vessels are numbered 106. A single cavity 108 is centrally disposed and has multiple functions, one of which is acting as a reservoir for receipt of priming residue.

[0063] A vessel 110 for receiving and storing eyewash is seen in FIG. 4. As vessel 110 is used for dispensing eye drops it should be fabricated of flexible material which is radiation stable. Vessel 110 comprises a threaded, superiorly disposed wall 112 about an opening 114.

[0064] A sealing and protective cap 120 for vessel 110 is seen in FIG. 5.

[0065] Cavities 106 are sized and shaped to securely, but release-ably, retain caps 120 therein, as seen in FIG. 6. Cavities 104 are sized and shaped to securely, but release-ably, retain vessels 110. The combination of a tray 100 laden with caps 106 and vessels 104 is referenced as filled tray 130 hereafter.

[0066] A first step in convenience kit assembly is displacing a filled tray 130 (see FIG. 6) into bag 40 through opening 44 (see FIG. 1) as seen in FIG. 7. After the tray is so disposed, bag opening 40, as a second step, is closed and sealed (forming closed opening 44) as also seen in FIG. 7. Note that conduit 28 can be disposed in cavity 108 for packaging and storing purposes.

[0067] A third and final assembly step for providing a ready to use convenience kit 200 (seen in FIG. 8) is sterilization. While other modes of sterilization can be used, it is preferred to use gamma radiation when sterilizing to provide kit 200. For this reason, all parts and components used to fabricate kit 200 should be radiation stable. It should be noted that, once sterilized, all contents of convenience kit 200 cannot be further contaminated or de-sterilized as all matter and fluid which can enter bag 40 must enter through filter component 20 which inhibits contaminated matter and sterilizes all fluid displaced there through. (Note that, unless stated differently, reference to being sterilized generally implies being sterilized to a predetermined SAL, hereafter.)

[0068] Thus, unless either the bag or filter barrier is perforated or ruptured all matter within the walls of bag 40 shall remain in an aseptic state. This permits dispensing fluids from an uncontrolled and potentially contaminating environment to be performed without regard to conditions exterior to kit 200.

[0069] For this reason, kit 200 may be considered superior to performance of the same function using a laminar flow hood. For, while the laminar flow hood provides an aseptic flowing gas-based environment, general achievement of an aseptic product requires careful technique and separate procedures to assure product sterility (as there is no facility which is part of a laminar flow hood, itself, which inherently sterilizes a product being produced therein).

[0070] As seen in FIG. 8, Female luer fitting 26 of filter component 20 of kit 200 is readily accessible for use in dispensing, through filter component, liquids into vessels within kit 200. As seen in FIG. 9, a conventional medical syringe can be affixed to fitting 26. So attached, syringe 210 may be displaced to lift or tent portions of bag 40 to provide a more facile access to components disposed within kit 200. Also, with or without syringe 210, filter component 20 may be so displaced to permit gas to enter bag 40 (being sterilized thereby) to establish more access space. However, once liquid has been delivered to the filter, the filter is wetted and blocks further transmission of gas there through.

[0071] As seen in FIG. 9, a so-attached syringe 210, or other luer fitting attached instrument, can be used to dispense liquid into a selected vessel 104 or cavity 108 (in the case of priming). All liquid, so dispensed, is sterilized by passage through filter component 20 such that all items and surfaces inside bag 40 remain sterile. Syringe 210 is seen to be superiorly disposed relative to a selected vessel 104 for dispensing sterilized liquid therein in FIG. 10.

[0072] Once filled each vessel must be capped to preserve sterilized product before the bag is opened to the field environment. The bag should be sized and bag material selected which permits a digital interface between cap and a users thumb and fingers to permit a cap 120 to be disengaged from a cavity 106 and displaced and be affixed to cap and seal product within a vessel 110. Sealing may involve rotating a cap, like cap 120, by threaded attachment as evidenced by vessel wall 112 (see FIG. 4). Depending upon cap material and frictional interface between bag 40 and cap 120, grasping and twisting a cap within bag 40 may be challenging. To provide an improved frictional interface, a cap 120 side attachment, such as a rubber band 220 seen in FIG. 9 can be used to provide assistance.

[0073] Due to associated functional requirements of a procedure involving the present invention, sterilized kit 200, may become a subkit if added to a more inclusive storage and shipment kit tray 230, as seen in FIG. 11. In such a case, it is preferred that other items provided within a tray 230, generally numbered 240, be compartmentalized as seen in FIG. 11.

[0074] It is preferred to provide a cover 240 which is sealingly affixed to tray 230 to protect product cleanliness as seen in FIG. 12. Note that sterility protection is not required as kit 200 is a fluid sterilizing as well as an aseptic protecting instrument. Therefore, cover 240 may be removed from tray 230 for kit component access with safety in a field environment. Also, as may be noted in FIG. 12, removing cover 240 can provide a clean work area on the underside 242 of cover 240.

[0075] As indicated supra, convenience kits, made according to the present invention, may be used for transferring and sterilizing liquids in many applications. To provide a broadened perception of uses of such convenience kits, a second example is seen in FIG. 13.

[0076] Therein, a syringe 300 is sealed within a bag 40 and sterilized with other components inside to provide a convenience kit 200. A filter component 20 affixed to bag 40 at a site different from site 50 (site 50) provides a sterilizing fluid pathway into bag 40. Thereat, component 20 is affixed to bag 40 by the same process and manner as component 20 and components 60, 80 and 70 are affixed to bag 40. In use, all liquid dispensed through filter component 20 is sterilized before reaching pre-sterilized syringe 300. Syringe 300, being so filled, is digitally detached and a conventional luer cap 302 is digitally affixed thereto to provide a sterile liquid product for use in the field environment. In this manner, such a kit can be used to transfer questionable or contaminated liquid from a container (e.g. another syringe) to be sterilized and further dispatched to syringe 300 for delivery of a sterile product to a patient in the field environment.

[0077] The invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

[0078] What is claimed and desired to be secured by Letters Patent is: