摘要:
Methods of reducing smoke levels in smoke-affected areas, reducing the level of toxic compounds produced by fires, fire suppression, and increasing flame retardancy. In particular, methods according to the present invention comprise dispersing nanocrystalline particles in the areas affected by smoke for sorption of smoke particulates and toxic compounds produced from a fire. The nanocrystalline particles are also effective for use in methods of fire suppression and flame retardancy.
摘要:
A porous material (10) is contaminated with soil (14). Optionally, the porous material is partially shielded by an impermeable layer. The contaminated porous material is packaged and shipped to a user site. The contaminated porous material is removed from the package and placed in an automated processor containing medical equipment (22). The medical equipment and porous material are subjected to a cleaning, disinfecting, or sterilizing cycle in the processor. The cleaning process is evaluated by examining the porous material with an infrared or other electronic reader (24) to determine the presence of remaining soil which has not be removed during the cleaning, disinfecting, or sterilizing cycle.
摘要:
A decontamination apparatus for medical devices includes a decontamination basin (14a, 14b) with a selectively opened and closed cover member (16a, 16b) to provide selective access to the basin (14a, 14b). A mixing chamber assembly (80) selectively dispenses detergent concentrate and decontaminant concentrate into a liquid to form a liquid cleaning solution or a liquid decontaminant solution, respectively. A source of decontaminated rinse liquid, such as a microbe removal filter (54), is in selective fluid communication with the basin (14a, 14b). A source of anti-microbial liquid is in selective fluid communication with the microbe removal filter (54) and rinse liquid flow paths (58) between the microbe removal filter and the basin for decontaminating the filter (54) and the rinse lines (58). Each channel of a medical device (E) being decontaminated is connected to a channel flush line (30) and a channel pump (32) for flushing the channels of the device (E). A pressure sensor (42) is in communication with each flush line (30) to sense a blockage in the channels of the medical device (E). The channel pumps (32) pump liquid or decontaminated air through the device channels. A leak test system is also provided for testing the integrity of an outer sheath of a medical device (E) such as an endoscope.
摘要:
A countertop decontamination unit (A) has a decontamination chamber (10) which contains items to be sterilized, disinfected, or otherwise microbially decontaminated. A catheter (60) has an initial curve shape (62A). However, the catheter (60) is straightened in use and returns to a shape (62B). During a decontamination cycle, one or more porous clips (64) are disposed into frictional contact with the catheter. The clip (64) holds the catheter in the initial or undersized shape (62A) during the decontamination process. In the decontamination process, the decontamination fluid is heated at least to a temperature that resets the shape memory of the catheter (e.g., 40.degree.-60.degree. C.). The clip (64) has a sufficient porosity that microbial decontamination fluid penetrates through the clip to wet portions of the item surface in frictional contact with the clip assuring total microbial decontamination of the catheter. Once the decontamination is complete and the catheter is cooled, it holds the reset initial shape (62A).
摘要:
A method for more selectively removing macromolecules from a plasma solution, whereby plasma containing the macromolecules to be removed is provided and heated to a temperature near or above normal body temperature but below the boiling point of the plasma solution. The heated plasma solution is filtered while at a temperature near or above normal body temperature but below its boiling point with a membrane filter to remove selectively macromolecules from the plasma solution. An apparatus for accomplishing the foregoing is also provided.
摘要:
A chamber (10) is supplied with a pressurized cleaning agent of carbon dioxide and cosolvents from a first source (12) and an antimicrobial fluid, such as ethylene oxide or hydrogen peroxide from a second source (16). Chamber conditions are maintained in the sub-critical range for the carbon dioxide. The cleaning agent and antimicrobial fluid are recirculated through a separator (32) and a condenser (38) to filter contaminants from the mixture before returning the carbon dioxide, and optionally the antimicrobial fluid and other additives, to the chamber. Medical instruments or other articles within the chamber are cleaned by the cleaning agent and sterilized by the antimicrobial fluid in a single cycle, rendering them ready for reuse in a short period of time. The instruments may be cleaned and stored in hermetically sealable containers (82). The cleaning agent is rapidly evaporated from surfaces of the articles at the end of the cycle by reducing the pressure in the chamber. optionally, a vacuum pump (60) assists in removing the antimicrobial fluid from the chamber.
摘要:
An electrolysis unit (10, 210, 310) has an anode (16, 216,316) and a gas diffusion cathode (18, 218, 318). Air is fed to the cathode (18, 218) to generate peroxide species, such as hydrogen peroxide, peroxide ions, or peroxide radicals by electrolysis of oxygenated water. A peracetic acid precursor, such as acetyl salicylic acid, reacts with the peroxide to form peracetic acid. An ion selective barrier (20, 220) optionally separates the unit into two chambers, an anodic chamber (12, 212) and a cathodic chamber (14, 214). By selecting either a proton permeable membrane or an anion exchange membrane for the barrier, the peracetic acid may be formed in either an alkaline electrolyte in the cathodic chamber or in an acid electrolyte in the anode chamber, respectively.
摘要:
An apparatus (A) for sterilizing medical instruments and other articles includes a tray (12) with an article receiving area (14). An article to be microbially decontaminated is positioned in the receiving area (14) and a microbe blocking lid (10) is closed. A water electrolysis apparatus (30) receives water, splits the water into two separate streams that pass respectively through an anode chamber (34) and a cathode chamber (36), and exposes the streams to an electric field that results in the production of a catholyte solution for cleaning and an anolyte solution for sterilization. The anolyte and catholyte are selectively circulated through the article receiving area (14) by a pump (66) to clean and microbially decontaminate the external surfaces and internal passages of an article located therein. The anolyte or deactivated anolyte provides a sterile rinse solution. A reagent dispensing well (60) receives an ampule (80) or the like. The ampule (80) contains internal compartments which are selectively accessed or opened to dispense detergent concentrate and/or sterilant concentrate reagents into the circulating anolyte and catholyte solutions. A water treatment apparatus (28) dispenses either a salt or a cleaning agent into the water received from the source (24) to vary the electrolysis reaction or to form a cleaning solution to clean and flush the electrolysis apparatus (30), respectively.
摘要:
A method for cleaning, decontaminating, and sterilizing catheters (10) using a combination of liquid and gaseous/plasma sterilization techniques to ensure the complete and efficient sterilization of a catheter (10). Angiographic dye and saline are removed from the interior (36) of the balloon (14) and its lumen (16). The outer surfaces of the catheter (10) and a guide wire lumen (18) of the catheter (10) are cleaned, decontaminated, and sterilized (42) with a liquid sterilant. The liquid sterilant fills a balloon (14) and a balloon lumen (16) of the catheter (10). The liquid sterilant is retained in the balloon (14) and the lumen (16) for a select amount of time. Thereafter, the liquid sterilant is drained from the balloon (14) and the balloon lumen (16). The filling, retaining, and draining steps are repeated until an interior (36) of the balloon (14) and the balloon lumen (16) are sterilized. Residual liquid sterilant is rinsed from the interior (36) of the balloon (14) and the balloon lumen (16). The catheter (10) is dried and then a plasma or gaseous sterilant is used to sterilize at least the outer surfaces and the guide wire lumen (18) of the catheter (10).
摘要:
Medical and other instruments and devices (16, 44) may have a build-up of biological residue film, even after sterilizing. Dead cell membranes in this film can give off endotoxins. To check for the presence of biological residue film, light from a source (10, 40) travels along optical fibers (12, 42) and is focused by a lens (24) on a surface (26) to be examined. Reflected or transmitted light is conveyed by optical fibers (46) to an opto-electrical analyzing device (30, 48). In one embodiment, the opto-electrical device (30) senses the intensity of reflected light to provide an indication of reflectivity attributable to the biological film build-up. In another embodiment, a spectrophotometer (48) converts the returned light into an indication of the reflected spectrum which is analyzed (50) to determine the nature of the material which reflected the light, in particular the type of protein or other biological residue found on the examined surface.