The present invention relates to systems and methods for preconditioning soiled endoscopes for reprocessing.
After an endoscope is used on a patient, a number of steps are required to reprocess the endoscope before the contaminated endoscope can be reused. Included in the steps of reprocessing an endoscope is a cleaning and disinfecting step using, for example, a liquid disinfectant solution.
Apparatus and devices designed for, at least partially, automated cleaning and sterilization of medical devices and instruments are known. Automated Endoscope Reprocessors (AERs) are important devices widely used in the health care setting to reprocess lumen-containing medical devices including robotic endoscopic instruments, flexible and rigid type endoscopes, such as duodenoscopes and endoscope accessories, to decontaminate and clean them between uses. AERs are designed to kill microorganisms in or on reusable endoscopes by exposing their outside surfaces and interior channels to chemical solutions.
AER and endoscope manufacturers consider the long narrow channels of endoscopes and duodenoscopes to be particularly challenging areas of the device to reprocess. In addition, the recess around the duodenoscope's elevator area also poses challenges to effectively reprocess duodenoscopes.
Due to the potential association between reprocessed endoscopes and duodenoscopes and patient infection, AER and endoscope manufacturers conduct rigorous validation testing with endoscopes and duodenoscopes to evaluate AER reprocessing effectiveness of the recess around the duodenoscope's elevator area. It is important in these processes to minimize the time between the contamination of the endoscope in the procedure room and the cleaning and disinfection or sterilization of the endoscope. If there is a long period of time, such as more than one hour, the contaminants on the endoscope have time to dry out which makes them much harder to remove. If these contaminants are not removed, it can compromise the high level disinfection or sterilization of the endoscope.
To support adequate high level disinfection or liquid chemical sterilization, testing is expected to demonstrate a 99.9999% reduction of the most resistant microbes at several locations on the endoscope or duodenoscope to prevent infection transmission.
There exists a need for apparatus and processes to properly reprocess endoscopes and endoscope accessories to prevent patient contamination and infection.
This disclosure includes representative embodiments of preconditioning apparatus and processes for reprocessing endoscopes including, for example, colonoscopes and duodenoscopes, and endoscope accessories.
In one aspect, the present invention is directed to an endoscope preconditioning system that includes a sealable container to retain a contaminated endoscope, a foamed detergent source, a first system for applying foamed detergent to the outer surface of the endoscope, and a second system for applying foamed detergent or liquid detergent to the interior channels of the endoscope. In some embodiments of this endoscope preconditioning system, foamed detergent is applied to interior channels of the endoscope. In other embodiments, liquid detergent is applied to interior channels of the endoscope.
In this preconditioning system, foam or liquid detergent may be applied to the interior channels in several ways or modes. In some embodiments, foamed or liquid detergent is applied under positive pressure to an endoscope suction valve port or connector, an endoscope air/water valve port or water-jet connector, or an endoscope biopsy channel inlet to add foamed or liquid detergent to an air/water channel, biopsy channel, or biopsy/suction channel of the endoscope. In other embodiments foamed or liquid detergent is applied under positive pressure to the distal tip of the endoscope to add foamed or liquid detergent to an air/water channel, biopsy channel, or biopsy/suction channel of the endoscope. In still other embodiments, foamed detergent is applied at ambient pressure to a distal tip of the endoscope and foamed detergent is drawn into an air/water channel, biopsy channel, or biopsy suction channel of the endoscope by applying negative pressure suction to a biopsy channel inlet, air/water valve port, or suction valve port of the endoscope. In other embodiments, foamed or liquid detergent is applied at ambient pressure to a biopsy channel inlet, air/water valve port, suction valve port, water-jet connector or suction connector of the endoscope and foamed or liquid detergent is drawn into an air/water channel, biopsy channel, air channel, water channel, or biopsy/suction channel of the endoscope by apply negative suction or vacuum to the distal tip of the endoscope, in other embodiments, the channels can be balloon filling channels, balloon evacuation channels, and/or elevator wire channels.
In some embodiments of this endoscope preconditioning system, foamed or liquid detergent is applied to interior channels of the endoscope, and the interior channels of the endoscope are cleaned or treated with a cleaning apparatus or device. In other embodiments, foamed detergent is applied to outer surfaces of the endoscope and is also applied with a cleaning device, such as a brush or a cylindrical member with bristles disposed therein to envelop and clean these outer surfaces.
In another aspect, the present invention is directed to a method of preconditioning an endoscope contaminated with gross bioburden comprising the steps of i) retaining the contaminated endoscope in a container, contacting the outer surfaces of the endoscope with a foamed detergent, iii) contacting the interior channels of the endoscope with the foamed detergent or liquid detergent to provide a pretreated endoscope, and optionally sealing the pretreated endoscope in the container. In some embodiments the sealable container may be a rigid tub or bin, optionally having a rigid or flexible cover. In other embodiments, the sealable container may be a flexible, sealable bag.
In some embodiments, a cleaning device is used to contact the interior channels of the endoscope. In some embodiments, the step of contacting the interior channels of the endoscope further includes laterally moving a cleaning device having an elongate configuration, a distal portion of the elongate configuration including a cleaning member with radially extending members that clean the interior channels of the endoscope. In one example embodiment, the radially extending members include a plurality of disks (rigid or semi-rigid silicone or plastic, for example) or a plurality of bristle members. In related embodiments, the radially extending members are overlaid a portion of the elongate configuration or a cylindrical shaft includes one or more holes or pores configured to distribute the foamed or liquid detergent to the interior channels of the endoscope, the pores or holes facilitating the seepage of the detergent in between the radially extending members.
In yet other related embodiments, the cylindrical shaft includes an elongate cylindrical member disposed on the cylindrical shaft to distribute the foamed or liquid detergent to the interior channels of the endoscope. In these embodiments, the elongate cylindrical member is one of a solid, porous or sponge-like construction. The elongate cylindrical member, in one example embodiment, includes a series of ring members disposed thereon that work like nubs to clean the interior channels of the endoscope.
In embodiments of the endoscope preconditioning system and method, external conduits, tubing, or connectors may be used to provide foamed detergent to the interior volume of the container as well as providing foamed detergent or liquid detergent to interior channels of the endoscope.
In another aspect, the present invention is directed to a flexible bag for preconditioning a contaminated endoscope. The bag comprises a transparent polymeric bag to retain the contaminated endoscope in an interior volume of the bag, connectors to allow materials to escape from the interior of the bag, a connector to deliver foamed detergent to the interior volume of the bag from an external foamed detergent delivery source, and conduits to deliver the foamed detergent to one or more interior channels of the endoscope.
In another aspect, the present invention is directed to a flexible bag for preconditioning a contaminated endoscope comprising a transparent polymeric bag to retain the contaminated endoscope in an interior volume of the bag, a foamed detergent delivery source in the bag, and a connector to remove material from the interior of the bag by applying negative pressure or vacuum to the connector.
In another aspect, the present invention is directed to a flexible bag for preconditioning a contaminated endoscope comprising a transparent polymeric bag to retain the contaminated endoscope in an interior volume of the bag, a foamed detergent delivery source in the bag, and a connector or aperture to allow material from the interior of the bag to vent to the exterior of the bag.
In another aspect, the present invention is directed to a flexible bag for preconditioning a contaminated endoscope comprising a transparent polymeric bag to retain the contaminated endoscope in an interior volume of the bag, a foamed detergent delivery source in the bag, an aperture in the bag to allow material from the interior of the bag to vent to the exterior of the bag, and an aperture cover to seal the bag after foamed detergent is delivered from the foamed detergent delivery source.
In another aspect, the present invention is directed to a flexible bag for preconditioning a contaminated endoscope comprising a semipermeable bag to retain the contaminated endoscope in an interior volume of the bag and allow materials to escape or vent from the interior of the bag, and means to deliver foamed detergent to the interior volume of the bag from an external or internal foamed detergent delivery source.
In another aspect, the present invention is directed to the use of a foamed detergent to precondition a contaminated endoscope. When used, the foamed detergent is stable; immediately breaks down gross bioburden including organic materials, microbes, viruses; encapsulates gross bioburden to prevent drying and hardening of debris; will not slosh or spill; and maintains moisture to prevent adhesion or drying of contaminants.
In all of the various embodiments, conduits may be connected to the interior channels of the endoscope to remove materials from the channels and deliver or draw foamed detergent or liquid detergent into the channels. In other embodiments conduits may be connected to the interior channels of the endoscope to remove materials from the interior channels of the endoscope and draw foamed detergent into the channels when foamed detergent is delivered from a foamed detergent delivery source.
While multiple embodiments are disclosed, still other embodiments of the present invention will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of the invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive. All references cited in the instant specification are incorporated by reference for all purposes. Moreover, as the patent and non-patent literature relating to the subject matter disclosed and/or claimed herein is substantial, many relevant references are available to a skilled artisan that will provide further instruction with respect to such subject matter.
The invention may take form in various components and arrangements of components, and in various steps and arrangements of steps. The drawings are only for purposes of illustrating specific embodiments and are not to be construed as limiting the invention.
Procedures for reprocessing endoscopes, such as colonoscopes and duodenoscopes, involve a number of critical steps to ensure rigorous cleaning and disinfection of contaminated endoscopes. As part of the reprocessing process, a clinician generally pulls or pushes a detergent solution through the interior channels of the endoscope to start the cleaning process and would then send the endoscope to a manual cleaning sink in a dedicated reprocessing area. It is important in the reprocessing process that the reprocessing begins immediately after the endoscope is used. If the process is delayed, such as having the process delayed for more than an hour after the endoscope is used, accepted reprocessing procedures may require an endoscope to be soaked in a detergent solution for as much as 8 hours before the endoscope then undergoes the rigorous reprocessing process. This soaking procedure makes the endoscope not useable in clinic procedures for an entire day.
The foamed or liquid detergent may be introduced in the channels in several modes. In one embodiment, foamed or liquid detergent may be introduced into the interior channels 11, 15 and/or 16 via the distal end 19 of the endoscope 10 by forcing the detergent under positive pressure through a connector that fits over the outside of the distal end 19. In this embodiment the appropriate connectors or valves would be opened in order to allow air to escape and the channel to be filled. In another embodiment, foamed or liquid detergent may be drawn into the interior channels 11, 15 and/or 16 by placing the distal end 19 of the endoscope 10 in a source of detergent and then applying negative pressure or vacuum to the appropriate connectors or valves to draw the detergent into the interior channels. In another embodiment, foamed or liquid detergent may be forced into interior channels 11, 15 and/or 16 under positive pressure by connecting a source of detergent to the appropriate connector or valve and forcing the detergent through the interior channels to the distal end 19 of the endoscope 10. In still another embodiment; a negative pressure or vacuum may be applied to the distal end 19 of the endoscope 10 through a connector that fits over the outside of the distal end 19. In this embodiment, the appropriate connectors or valves may be connected to a suitable detergent source so that the detergent may be drawn through the interior channels 11, 15 and/or 16 to the distal end 19 when negative pressure or vacuum is applied to the distal end 19 of the endoscope 10. One skilled in the art would readily appreciate that a variety of connectors, conduits and tubing would be suitable for applying the foamed detergent to the interior channels of the endoscope illustrated in
There are alternative embodiments to the embodiment illustrated in
One embodiment of this disclosure is when the bag illustrated in
Another embodiment of this disclosure is when the bag illustrated in
In addition to the embodiments described above, other embodiments of a preconditioning process may be used with a flexible bag, foamed detergent, bag connectors and optional liquid detergent. In one embodiment, a contaminated endoscope may be place in a bag, for example, and the outside surfaces of the endoscope may be completely covered with a foamed detergent from internal or external sources before or after the bag is sealed. During this same general procedure, the interior channels of the endoscope may be with filled with liquid detergent, again, before or after the bag is sealed. The order of the procedure may be varied as needed in order to assure the outer surfaces and interior channels of the endoscope are in contact with the foamed or liquid detergent so that the surfaces will remain in a wet or damp condition in the sealed bag until the endoscope may be fully reprocessed before it next use.
A suitable foamed detergent for use in the disclosed embodiments is INTERCEPT foam available from Medivators, Plymouth, Minn. A suitable liquid detergent for use in the disclosed embodiments is INTERCEPT detergent also available from Medivators, Plymouth, Minn.
Referring now to
In one example embodiment,
In another example embodiment,
In another example embodiment,
In yet another example embodiment,
Cleaning end 104 may include a plurality of extending members 110, wherein each extending member 110 extends outward from elongate shaft 102, for example at a perpendicular angle. In an embodiment, the extending members 110 are fixed, while in another embodiment, the extending members 110 are expandable. Extending members 110 may be bristle-like, comprising a material selected from polyester, polypropylene, cotton, woven fabrics, non-woven fabrics, nylon; or polyamide derivatives.
Alternatively, extending members 110 may be located along the length of the elongate shaft 102.
One embodiments of a cleaning end 104 may include an expandable squeegee. Such a device is capable of expanding in diameter to be used in endoscopes having interior channels with different diameter. A squeegee may be made from materials selected from flexible plastics, rubber, or similar materials.
Another cleaning end 104 may comprise a balloon catheter-type expanding member. In various example embodiments, the balloon portion disposed on the shaft of the cleaning device is: 1) formed of different sizes and includes various folds to accommodate balloon expansion; 2) one or more balloons are disposed along the shaft of cleaning device; and 3) the surface of the balloon and the folds include nubs or bumps to assist in cleaning the interior channels of the endoscope when the balloon is expanded and is combined with the cleaning foam or liquid detergent. In a related embodiment, the balloon or balloons disposed about the shaft of the cleaning device (as well as the shaft) include pores or holes to allow the foam or liquid detergent to flow through the shaft and into the balloon and fill the it with detergent that thereafter seeps from the balloon as it is cleaning the interior diameter and surfaces of the channels.
Modifications and variation of the above-described embodiments of the invention are possible without departing from the invention, as appreciated by those skilled in the art in light of the above teachings. It is therefore understood that, within the scope of the claims and equivalents, the invention may be practiced otherwise than as specifically described.
The explanations and illustrations presented herein are intended to acquaint others skilled in the art with the invention, its principles, and its practical application. Those skilled in the art may adapt and apply the invention in its numerous forms, as may be best suited to the requirements of a particular use. Accordingly, the specific embodiments of the present invention as set forth are not intended as being exhaustive or limiting of the invention.
This application claims priority to U.S. Provisional Patent Application No. 62/460,144 filed Feb. 17, 2017, which is hereby incorporated by reference in its entirety for all purposes.
Filing Document | Filing Date | Country | Kind |
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PCT/US18/18489 | 2/16/2018 | WO | 00 |
Number | Date | Country | |
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62460144 | Feb 2017 | US |