75-21-8 . Metal fittings containing magnesium, copper or silver should be avoided, since traces of acetylene in ethylene oxide may produce metal acetylides capable of detonating the vapor [MCA SD-38, 1971]. After another 2 minutes (4 minutes of total treatment), about how many cells would still be alive? Ethylene oxide has a sweet, ether-like odor at air concentrations above 500 ppm. Sodium nitrate and sodium nitrite are added to many meat products, such as ham, bacon, hot dogs, and sausage. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Ethylene oxide is produced in large volumes and is used to make other chemicals, especially ethylene glycol, a chemical used to make antifreeze and polyester. Cycle Parameters. It is a relatively ‘cold’ sterilization technique and offers high compatibility with most materials used in the manufacture of medical devices, such as plastics, polymers, metals and glass. 7. bacteriostatic kills vegetative bacterial cells. Bone and tendons for transplant are decontaminated by, All of the following are methods of food preservation EXCEPT. The major use of ethylene oxide is as a chemical intermediate in the manufacture of ethylene glycol. It is shipped as a liquefied, compressed gas. This form of antimicrobial control is called __________. Test your knowledge of this information with this quiz and worksheet. Ethylene Oxide Health & Safety Manual: Training and Reference Materials on the Safe Use of Ethylene Oxide in Sterilizing Equipment. The initial population was 107 living cells (10,000,000). Which of the following correctly describes a method of physical control used to control microbial growth on or in such items? For this reason, following sterilization the item must undergo aeration to remove residual ETO. This is an example of chemical food preservation. Ethylene oxide (C₂H₄O) is a flammable gas with a somewhat sweet odor. Which of the following methods is used to preserve food by slowing the metabolic processes of foodborne microbes? Which concentration of ethanol is the most effective bactericide? Learn vocabulary, terms, and more with flashcards, games, and other study tools. Usually, ethylene is supplied from the thermal cracking of naptha from petroleum refining. None of the answers is correct; all of these factors may contribute to hospital-acquired infection. Acute (short-term) inhalation exposure to high concentrations of ethylene oxide can cause headache, dizziness, nausea, fatigue, respiratory irritation (e.g., coughing, shortness of breath, wheezing) and, in some cases, vomiting and other types of gastrointestinal distress. Ethylene oxide (also known as ETO or oxirane) is a flammable gas with a somewhat sweet odor. The thermal death time is the time needed to kill all the bacteria in a particular culture at a certain temperature. They are known to cause cancer and other serious health impacts such as reproductive effects or birth defects. Relative Humidity. A small but important use of ethylene oxide is in the sterilization of medical supplies and devices and healthcare products such as bandages. Although ethylene oxide is a hazardous material in terms of flammability, reactivity and toxicity, it can be distributed and handled safely provided that appropriate precautions are observed. Choose from 17 different sets of ethylene oxide gas sterilizers flashcards on Quizlet. Workers may be harmed from exposure to ethylene oxide. Ethylene oxide is soluble in water and organic solvents. Botulism food poisoning is a preventable illness if special precautions are taken during food preparation. Moist heat destroys organisms by denaturing proteins. Start studying ethylene oxide sterilization. Most ethylene oxide is used as an intermediate in the production of other chemicals used to manufacture products, such as fabrics for clothes, upholstery, carpet and pillows. CAS number: 75–21–8 NIOSH REL: <0.1 ppm (<0.18 mg/m 3) TWA, 5 ppm (9 mg/m 3) CEILING, 10-minutes/day; NIOSH considers ethylene oxide to be a potential occupational carcinogen as defined by the OSHA carcinogen policy [29 CFR 1990]. These additives help to prevent the growth of Clostridium botulinum by inhibiting certain iron-containing enzymes of the organism. What was the MOST likely source of the family's botulism food poisoning? Any process that destroys the non-spore forming contaminants on inanimate objects is sterilization. Start studying Ethylene Oxide (EO)Gas. _______________ is a process used to destroy pathogens in food and drinks. An antimicrobial chemical was added to a population of bacteria. Ethylene oxide is a flammable, colorless gas used to make other chemicals that are used in making a range of products, including antifreeze, textiles, plastics, detergents and adhesives. Oxidizing agents include all of the following EXCEPT, All of the following substances are effective against nonenveloped viruses EXCEPT. The weight of ethylene oxide is determined by weighing to the nearest ± 0.1 mg. the needle ethylene oxide bubbles should not appear so that ethylene oxide does not es-cape when the needle is withdrawn through the septum. Which of the following is a limitation of the autoclave? It cannot be used with heat-labile materials. A pressure cooker utilizes steam to create a higher-pressure environment that allows the food to cook at higher temperatures than normal. Start studying Micro - Ch. Prior to drawing blood for a blood donation, the nurse will clean the arm with a Betadine solution. Ethylene oxide also is used to sterilize equipment and plastic devices that cannot … Sue noticed that the pressure cooker was malfunctioning during the canning process. The pH of the medium has no effect on the activity of the disinfectant being applied. The melting point of ethylene is −169.4 °C [−272.9 °F], and its boiling point is −103.9 °C [−155.0 °F]. Preparation of Ethylene Glycol – C 2 H 6 O 2. Ethylene oxide is a flammable gas with a somewhat sweet odor. Express your answer using two significant figures. Which of the following best explains why the pressure cooker is so important in the canning process? It is a member of the ether family; known as an epoxide. It must be done at a lower temperature than other methods so that _______________. During a flood, a community's well water system is contaminated with a pathogenic fungus. Which of the following correctly describes a method of chemical control used to control microbial growth? Learn ethylene oxide with free interactive flashcards. The gas I'm talking about is called ethylene oxide. High toxic , low temp sterilization method, vacuum, humidification, exposure , sterilant introduction, fin…, Removes all the air from the ethylene oxide chamber and and th…, Sterilisation, disinfectant and Ethylene Oxide, Isolation/barrier nursing, hygiene, vaccinations, balanced die…, -A substance derived from living matter such as Faeces, urine,…, -A chemical that reduces breaks surface tension allowing the d…, -it kills microorganisms (including endospores) by interfering…, -concentration of EO gas... -temperature... -humidity... -time, gas comes in high-pressure metal cylinders or in disposable ca…, influences the destruction of microorganisms and increase the…, classes of chemical agents ETHYLENE OXIDE, Alkylating agent -- cross links proteins and other macromolecu…, process of eliminating or reducing harmful microorganisms from…, process of killing all microorganisms and their spores, steam, ethylene oxide, hydrogen peroxide, bleach, dry heat, ga…, ETO - Ethylene Oxide.... Sterilization Mec…. She should have fixed the instrument, borrowed a properly working one, or purchased a new pressure cooker. Can ethylene oxide cause immediate/acute health effects? Ethylene oxide (EO) sterilization is the most common industrial sterilization technique for medical devices. Both the gas and liquid are potential fire and explosion hazards. Exposure: Add EtO, all…, Flush load with warm filtered air to remove residuals. Ethylene oxide is a hazardous air pollutant, also referred to as a toxic air pollutant or air toxic. Which of the following substances is used for surgical hand scrubs? Chem., 1950, 42, p. 1251]. Which of the following does NOT achieve sterilization? Which of the following disinfectants acts by disrupting the plasma membrane?